United States Office of Science EPA -822-R-02-034 Environmental and Technology April 2002 Protection Agency (4303T) EPA Statistical Support Document for the Development of Round 2 Biosolids Use or Disposal Regulations ------- ------- Acknowledgments This document was prepared by Charles E. White of the Engineering and Analysis Division in EPA's Office of Water. Kathleen Stralka with Science Applications International Corporation provided assistance under EPA Contract No. 68-C-99-233. Questions or comments regarding this document should be addressed to: Charles E. White, Statistician USEPA (4303T) 1200 Pennsylvania Avenue, NW Washington, DC 20460 White.Charles-E@EPA.Gov ------- ------- TABLE OF CONTENTS I. Executive Summary Page 1 II. Introduction Page 2 III. Analytical Data and Methods Page 3 IIIA. Sample Design and Survey Weights Page 3 IIIB. Data Conventions Page 6 IIIC. Toxic Equivalents Page 6 HID. Statistical Methods Page 6 IV. Dry Weight of Biosolids Disposed in 1988 Page 9 V. NSSS National Summary Statistics—Dioxins, Furans, and Dioxin-like PCB Toxic Equivalent Estimates Page 11 VA. 2001 NSSS Dioxin and Dioxin-like Concentration Descriptive Statistics Page 11 VB. 2001 NSSS National Summary Statistics—Dioxins and Dioxin-like PCB Toxic Equivalent Estimates Page 12 VC. 2001 NSSS National Dioxin and Dioxin-like TEQs By Flow Group Page 13 VD. 1988 and 2001 NSSS National Summary Statistics—Dioxins and Dioxin-like PCB Toxic Equivalent Estimates Page 15 VI. Self-monitoring Data Over Time Page 18 VIA. Self-monitoring Data Page 18 VIB. Data Conventions Applied to Self-monitoring Data Page 19 VIC. Self-monitoring Summary Statistics—Dioxins, Furans, and Dioxin-like PCB Toxic Equivalent Estimates Page 19 Appendix A National Pollutant Concentration Percentile Estimates from the 2001 NSSS Appendix B National Toxic Equivalent Estimates from the 2001 NSSS Appendix C Empirical Cumulative Distributions of National Toxic Equivalents from the 2001 NSSS Appendix D Empirical Cumulative Distributions of National Toxic Equivalents from the 2001 NSSS By Flow Groups ------- LIST OF TABLES Table 1: 2001 NSSS Survey Weights Page 5 Table 2: Strata Definitions and Sizes Page 5 Table 3: WHO—Toxicity Equivalency Factors Page 7 Table 4: Dry Weights of Biosolids Disposed in 1988 (U.S. Tons) Page 10 Table 5: 2001 NSSS National TEQ Estimates—Total TEQs Page 12 Table 6: 2001 NSSS Total Dioxin and Furan and Dioxin-Like PCB National TEQ Estimates— POTWs By Flow Groups Page 13 Table 7: Total Dioxin and Furan National TEQ Estimates Page 15 Table 8: Number and Type of Self-monitoring Data Page 18 Table 9: Total Dioxin and Furan TEQs Nondetected Values Set to Zero Page 22 Table 10: Total Dioxin and Furan TEQs Nondetected Values Set to 1A ML Page 24 Table 11: Total Dioxin and Furan TEQs Nondetected Values Set to ML Page 26 Table 12: Total Dioxin-like PCB TEQs Nondetected Values Set to Zero Page 28 Table 13: Total Dioxin-like PCB TEQs Nondetected Values Set to 1/2ML Page 30 Table 14: Total Dioxin-like PCB TEQs Nondetected Values Set to ML Page 32 Table 15: Total Dioxin, Furan and Dioxin-like PCB TEQs Nondetected Values Set to Zero Page 34 Table 16: Total Dioxin, Furan and Dioxin-like PCB TEQs Nondetected Values Set to 1A ML Page 36 Table 17: Total Dioxin, Furan and Dioxin-like PCB TEQs Nondetected Values Set to ML Page 38 ------- I. EXECUTIVE SUMMARY In accordance with Section 405 (d) of the amended Clean Water Act, the Environmental Protection Agency (EPA) proposed a limitation of 300 parts per trillion (ppt) toxic equivalents (TEQs) of dioxin, furan and dioxin-like coplanar polychlorinated biphenyls (PCBs) in biosolids. Under the proposed limitation, biosolids containing a TEQ in excess of this proposed limitation may not be land applied. Additionally, EPA also proposed that publicly owned treatment works (POTWs ), privately owned treatment works, and secondary preparers producing biosolids containing dioxin and dioxin-like TEQs in the range of 30 to 300 ppt be required to monitor their TEQs annually. Covered facilities producing less than 30 ppt TEQs would monitor every 5 years. Supporting regulation development for the use or disposal of biosolids containing dioxin and dioxin-like compounds, this document presents estimates describing the dry weight amount of biosolids used or disposed at various-sized treatment works across the country, distribution of TEQs of dioxin and dioxin-like compounds in biosolids from POTWs across the country, and the variability over time of dioxin and dioxin-like TEQs in biosolids from three POTWs. The estimated dry weight of biosolids used and disposed by POTWs were determined from data collected in the EPA's 1988 National Sewage Sludge Survey (NSSS). Dioxin and dioxin-like TEQs in biosolids as measured during the 2001 and 1988 NSSS support distributional assessments. It should be noted that chemical analytical techniques differed between the 1988 and 2001 surveys. In 1988, dioxin-like coplanar PCBs were measured as aroclors. Since the percentage of coplanar PCBS that comprise the aroclors are not publicly available, TEQs for the dioxin-like PCBs are not provided in this report. By contrast, the individual dioxin-like PCBs were measured in the 2001 NSSS and their TEQs are reported. Also, during the 1988 NSSS, the percent solids of each biosolid sample was quantified and a standard volume of each was subjected to chemical analyses. Dry weight amounts of the dioxin and furans were then determined mathematically based on the sample's percent solids. In 2001, the sample's volume was adjusted based on percent solids and this adjusted volume was then submitted for chemical analyses. Finally, characterization of dioxin and dioxin-like TEQs in biosolids overtime was determined from long term monitoring data provided voluntarily to the EPA by three POTWs. The EPA conducted the 1988 NSSS to support the development and promulgation of "Round 1" regulations. POTWs that practiced secondary or higher treatment of waste water were sampled from flow categories according to a statistical probability design. In 1988, biosolids from 174 POTWs were measured for dioxins and furans. Dioxin-like PCBs were measured as aroclors. During the 1988 NSSS, biosolid samples were obtained after final treatment just prior to use or disposal. EPA's 2001 NSSS characterized the dioxin and dioxin-like TEQ levels in biosolids produced by POTWs during that year. The 2001NSSS sample of 94 POTWs was drawn from EPA's 1988 NSSS. The 94 sampled POTWs that practiced secondary or higher treatment of wastewater in 2001 projects to 6,857 POTWs in the Nation. The maximum observed total dioxin/furan and dioxin-like PCB TEQs from the 2001 NSSS is 718 ppt. Of the 94 POTWs in the sample, only two POTWs exceeded the 300 ppt limitation. One POTW is in the category that treats more than 10 million but less than 100 million gallons of wastewater per day. The other is from the category of POTWs that treats more than 1 million but less than 10 million gallons of wastewater per day. Together, these two POTWs represent 61 of the 6,857 POTWs in the Nation in 2001 that practice secondary or higher treatment of wastewater— or 0.9 percent of the POTWs in the Nation. The 99th percentile estimate of total dioxin/furan and dioxin-like PCB TEQs from the 2001 NSSS ranges from 114 to 138 ppt, depending on the method used for congeners or aroclors not measured above the ------- minimum level (ML) of quantitation in a sample. The percentage of POTWs that produce biosolids with less than 30 ppt of dioxin and dioxin-like TEQs ranges from 79 percent to 73 percent, depending on the method used to produce estimates when dioxins are not measured above the ML in a POTW's biosolids sample. When the value zero is substituted for dioxin congeners not measured above the ML, 79 percent of the POTWs that practice secondary or higher treatment of wastewater in 2001 are below the total dioxin and dioxin-like TEQ 30 ppt limit and therefore would be required to monitor every 5 years. If the congener's ML values is substituted for those samples from which the congener was not measured above the ML, then 73 percent of the POTWs in 2001 produce biosolids containing less than 30 ppt TEQs of dioxin. Of the three POTWs that supplied self-monitoring data, one submitted 90 monthly dioxin and furan TEQs. These data were collected from 1991 through 2000. Although total dioxin and furan TEQs were less than 300 ppt from March 1992 through May 1993, TEQs ranged from 100 to 265 ppt during that time. After that, only three monthly TEQs exceeded 100 ppt. One of these values , 325 ppt, occurred in November 1994. The high TEQ for this month was dominated by a high OCDD measurement. The remaining POTWs reported monthly self-monitoring TEQs from 2000 and 2001. These total TEQs were rather consistent over time; however, the POTWs did report total TEQs in excess of 30 ppt and thus would be required to monitor under this "Round 2" regulation. II. INTRODUCTION Under the authority of Section 405 (d) Clean Water Act, as amended, the Environmental Protection Agency (EPA) is promulgating limitations for use or disposal of biosolids (40 CFR 503). Biosolids are treated sewage sludge, which is a byproduct of municipal wastewater treatment. Land application, surface disposal, and incineration are the regulated uses or disposal practices for biosolids. In 1993, EPA promulgated limits for nine toxic pollutants in biosolids that are to be land applied, surface disposed, or incinerated. Regulated pollutants included metals, pathogens, and total hydrocarbons. The 1993 limitations are referred to as the "Round 1" regulation for use and disposal of biosolids. In December 1999, EPA proposed a "Round 2" limitation of 300 parts per trillion (ppt) toxic equivalents (TEQs) of dioxins. Ppt is equivalent to nanograms per kilogram (ng/kg). The term "dioxins" is used in this document to encompass dioxins and dioxin-like poly chlorinated biphenyls (PCBs). This group of dioxin-like chemicals have similar chemical properties and can thus elicit common toxic responses. Under the proposed Round 2 regulation, biosolids containing more than 300 ppt TEQs of dioxin may not be land applied. The proposed Round 2 regulation also requires that all facilities test biosolids to be land applied for dioxins. Publicly owned treatment works (POTWs) finding dioxin TEQ levels between 30 and 300 ppt in their biosolids would be required to monitor dioxin levels annually. POTWs with less than 30 ppt of TEQs of dioxin would be required to monitor the dioxin levels in their biosolids once every 5 years. Exceptions to this testing requirement would be biosolids from POTWs that treat less than one million gallons of wastewater per day and small POTWs that prepare less than 290 dry metric tons of sewage sludge annually. EPA conducted the 1988 National Sewage Sludge Survey (NSSS) to support the development and promulgation of Round 1 regulations. This survey was conducted according to a statistical probability sample design. Biosolids from 174 POTWs were sampled and chemically analyzed. These samples projected to 7,714 POTWs in the Nation in 1988. In support of Round 2 regulation development, EPA conducted a 2001 NSSS. The Agency obtained biosolids samples from 94 POTWs that participated in ------- the 1988 NSSS analytical survey. The samples in the 2001 NSSS project to 6,857 POTWs in the Nation in 2001. Section III of this report describes the sampling plan for the 2001 NSSS. It also includes a discussion of sample weights and their application for projecting sample estimates to POTWs in the Nation. This report presents three information components that are integral to risk assessment and regulation development, including: quantity of biosolids used and disposed; the amount of dioxin and dioxin-like TEQs in disposed solids, and the variability of the TEQ amounts over time. Section IV of this report presents national estimates of the dry weight amounts of biosolids disposed by POTWs for 1988. The 2001 NSSS did not collect disposal amount information. Section V provides summary statistics for 2001 dioxin and dioxin-like pollutants, including three sets of tabulated estimates of the mean, median, and upper percentiles by congener. The estimates differ by the value that enters the estimation algorithms when a congener is not measured above the minimum level (ML) in a sample. The three methods substitute the values zero, one-half the ML, and the ML of the congener, respectively, when a congener is not measured above the ML in a sample. Application of toxic equivalent factors (TEFs) to POTW congener dry weight concentrations is the basis for estimating TEQs. The products of congener TEFs and congeners' dry weight concentrations from the POTWs sample are summed across congeners to produce the POTWs TEQ. Section V reports total TEQs for dioxins and furans; total TEQs for co-planar PCBs; and total TEQs for dioxins, furans, and co-planer PCBs from the 2001 NSSS. Again, national estimates are presented for each of three substitution methods when a congener is not measured above the ML in a POTW sample. Section V also provides side-by-side estimates of dioxin and furan TEQs from the 2001 and 1988 NSSS. Graphical empirical cumulative distributions of TEQs from the 2001 and 1988 NSSS augment tabulated estimates. Appendices C and D list cumulative empirical distributions underlying the graphics presentations. Results of statistical tests of differences in the national average amounts of total dioxin and furan TEQs between 1988 and 2001 are presented in Section V. Three POTWs submitted monthly self-monitoring data. Data were collected predominantly during 2000. However, one POTW provided data from 1991 through 2000. Section VI presents summary statistics for TEQs and displays graphical presentations of these data overtime. III. ANALYTICAL DATA AND METHODS This section defines the sample design and resulting weights for the 2001 NSSS. Because the 1988 NSSS is the basis from which the 2001 NSSS was drawn, Section IIIA presents a description of the 1988 NSSS. Section IIIB provides a description of the conventions and statistical methods employed to generate estimates presented in this report. Sections IIIC and HID discuss TEFs and statistical methods. IIIA. SAMPLE DESIGN AND SURVEY WEIGHTS To support Round 1 regulatory development efforts, EPA's 1988 NSSS collected biosolids quantity and pollutant occurrence data from a national probability sample of POTWs practicing at least secondary treatment of wastewater. Operationally, secondary treatment was defined as a primary clarifier process followed by biological treatment and secondary clarification. In 1988, 11,407 POTWs in the 50 states, Puerto Rico, and the District of Columbia met these criteria. ------- A statistical probability sample of 208 POTWs in the contiguous states and the District of Columbia comprised the analytical component of the 1988 NSSS. These POTWs were randomly drawn from secondary or higher treatment POTWs that were categorized into one of four strata based on their average daily flow of influent wastewater. These strata are defined as: • Flow greater than 100 million gallons per day (MOD) • Flow more than 10 MOD but less than or equal to 100 MOD • Flow more than 1 MGD but less than or equal to 10 MGD • Flow less than or equal to 1 MGD. EPA contract personnel collected biosolids samples from 180 POTWs in the analytical component of the NSSS. Samples were collected just prior to use or disposal of the biosolids. All sample collection and preservation was conducted according to protocol. Contract laboratories analyzed each biosolids sample for percent solids and the concentration of 412 analytes. Method 1613 measured dibenzofurans and dioxins in a standardized sample volume. Coplanar PCBs were measured as PCB aroclors. Chemical analysis methods were either developed, chosen, or adapted to allow for the most reliable and accurate measurement of the subject analytes in the biosolids matrix. The concentration of quantified chemicals in 1988 samples were converted to dry weight measures based on their percent solids so that dioxin and furan TEQs would be comparable across the range of samples. A more detailed discussion the NSSS sampling plan, POTWs, and data are included in a November 1992 final report titled "Statistical Support Documentation for the 40 CFR, Part 503 Final Standards for the Use or Disposal of Sewage Sludge." A total of 208 POTWs were selected for sampling as part of the analytical component of EPA's 1988 NSSS. However, 32 POTWs were excluded from statistical analyses because biosolid samples were not obtained after the completion of secondary treatment of wastewater. National concentration estimates of toxic equivalence of dioxins and furans were calculated from a sample of 174 POTWs. Biosolid samples from SurveylDs 23-07-036 (Episode=1554) and 35-05-012 (Episode=1561) were not analyzed for the dioxin and furans during the NSSS. Therefore, dioxin and furan estimates, generated from a sample of 174 POTWs, apply to a population of 7,714 POTWs. From the 1988 NSSS, a sample 101 POTWs was statistically drawn. Of these 101 POTWs, seven were either no longer in business or did not produce biosolids. These seven POTWs—one in stratum two, three in stratum three, and three in stratum four—represent 855 POTWs in the population of 7,714 POTWs in the Nation that practiced secondary or higher treatment of wastewater in 1988. The table below presents the descriptive sampling statistics for the 2001 NSSS. ------- TABLE 1: 2001 NSSS Survey Weights STRATUM (H) 1 2 3 4 • • SAMPLE SIZE(NH) 11 30 36 24 101 OPERATING POTWsiN SAMPLE 11 29 33 21 94 ADJUSTED STRATUM (NH) 27 291 1,685 4,854 6,857 SAMPLING FRACTION (NH/NH) 11/27 29/291 33/1,685 21/4,854 STRATUM WEIGHT (NH/N) 27/6,857 291/6,857 1,685/6,857 4,854/6,857 1.000 The primary assumption underlying the statistical sample design of the 2001 NSSS is that the population consists of 7,714 POTWs across the four strata. These strata categorize the POTWs according to the average daily flow of influent wastewater. The strata definitions and the strata sizes based on the 1988 population are tabulated in the table below. TABLE 2: Strata Definitions and Sizes STRATUM 1 2 3 4 TOTAL STRATUM DEFINITION FLOW GREATER THAN 100 MOD FLOW >10 MOD BUT • *00 MOD FLOW >1 MOD BUT MO MOD FLOW • * MOD NUMBER OF POTWs IN THE POPULATION STRATUM 27 301 1,838 5,548 7,714 The sampling fractions for the 2001 NSSS were derived using Bayes Theorem. Define Ah as the event that a POTW was randomly drawn from the Nh POTWs in stratum h of the 1988 population of POTWs. Define Bh as the event that a POTW was randomly drawn for the 2001 NSSS. The event B/A indicates that a POTW in the 2001 NSSS was randomly selected from the sample of nh POTWs in the 1988 NSSS to be included in the 2001 NSSS. The event AB is defined as the event that a POTW is in both the 1988 NSSS and 2001 NSSS. Thus, using Bayes Theorem, P[Bh/Ah]*P[Ah]=P[ABh] applied to stratum one yields a sampling fraction ( P[ABh]) of 11/27 because =11/19*19/27. ------- IIIB. DATA CONVENTIONS From 2001 NSSS biosolids samples, EPA quantified dioxin and furans using EPA Method 1613B. PCB concentrations were determined by EPA Method 1668A. Because the amount of biosolids differs per sample, EPA adjusted sample volume by percent solids to report quantified amounts on a dry weight basis. This allowed sample concentrations to be compared on the same basis. Units of measure are ppt (ng/kg). Before calculating the national estimates of dioxin, furans, and dioxin-like PCBs presented in Section V of this report, pollutant concentrations were aggregated on a POTW basis to form one concentration value per POTW for each pollutant. For POTWs with multiple samples, the pollutant concentrations were averaged together. Each aggregate concentration is considered to be detected above the pollutant's ML if at least one of the samples was detected above the ML. If a pollutant was not measured above the ML, estimates were calculated using three substitution methods. These methods substituted the value zero, one-half the ML, or the ML value when a congener was not measured above the ML in a POTW's sample. IIIC. Toxic EQUIVALENTS Dioxins, used in this report to refer to dioxin-like compounds, consist of poly chlorinated dibenzo-p- dioxins, poly chlorinated dibenzofurans, and co-planar PCBs. Because dioxins are of similar chemical structure, they express similar toxicity. TEFs standardize the toxicity of dioxin congeners to 2, 3, 7, 8 tetrachlorodibenzo-p-dioxin (TCDD). The World Health Organization (WHO) provides a TEF scheme that includes TEFs for coplanar PCBs in addition to those for dioxin and furans. Van den Berg, et. al published "Toxic Equivalency Factors (TEFs) for PCBs, PCDDs, and PCDFs for Humans and Wildlife" in the 1998, volume 106 issue of Environmental Health Perspectives. Table 3 lists the WHO-98 TEFs. Section V of this report presents TEQs. National estimates of TEQs at the congener level are generated from POTW TEQs resulting from the product of the congener's TEF times the congener's dry weight concentration in the POTW's biosolid sample. Total TEQs for dioxin and furans, coplanar PCBs, and total dioxin and dioxin-like compounds from a POTWs sample were mathematically aggregated by summing the congener TEQs from a POTW's sample. TEQ = (Congenen x TEFi] + (Congenerj x TEFj) + ••• + (Congener* x TEFn) HID. STATISTICAL METHODS Section V of this report presents national summary statistics for dioxins and dioxin TEQs. Estimates of the mean and standard deviations of the empirical measures were generated according to stratified random sampling procedure listed in Cohen's 1977 edition of "Sampling Techniques." The weights are those tabulated in this section. EPA calculated percentile estimates using the nonparametric, weighted cumulative distribution function (CDF) technique described below. Denote the dry weight, or the TEQ concentration of a given pollutant in the sampled biosolid from the j* POTW in the ith survey flow stratum as Xir The values of the variable X:J are then sorted in order of ------- increasing TEQ or concentration. The values of the adjusted survey weights ordered values of X^ are then summed until the first occurrence of p. j) associated with the If X is defined as the concentration of the p* percentile then, XP = F(X) > p where F(X) = with ntj 2,I(Xij < X) and I(Xij < x) = 1 if Xij < x for x > 0 = 0 otherwise. To determine the TEQ or pollutant concentration associated with the p* percentile, an inverse function was applied to the cumulative distribution function. Define the pth percentile as Fx(Xp) such that P[X < xj > p/100. The inverse of this function F'Xp), is the smallest value of x satisfying Fx(x) > p where p is the desired percentile point (P) divided by 100. Because the cumulative distribution created by application of the formula is empirical, integer valued percentile points are not always realized. The convention applied to determine the TEQ concentration associated with the pth integer percentile from the empirical distribution function was to determine the smallest TEQ concentration value x such that Fx(x) > p. This value was denoted x p+ and is the q* ordered TEQ concentration. The next smallest TEQ concentration from x ^, or the concentration associated with the (q-l)st ordered TEQ concentration was then identified. The TEQ concentration value for the p* percentile was obtained using linear interpolation between the qth and (q-1) values. TABLE 3: WHO—Toxicity Equivalency Factors* DioxiN/FURAN CONGENER OCTACHLORODIBENZO-P-DIOXIN OCTACHLORODIBENZOFURAN 1,2,3,4,6,7,8-HEPTACHLORODIBENZO-P-DIOXIN 1,2,3,4,6,7,8-HEPTACHLORODIBENZOFURAN 1,2,3,4,7,8-HEXACHLORODIBENZO-P-DIOXIN 1,2,3,4,7,8-HEXACHLORODIBENZOFURAN 1,2,3,4,7,8,9-HEPTACHLORODIBENZOFURAN 1,2,3,6,7,8-HEXACHLORODIBENZO-P-DIOXIN TEF 0.0001 0.0001 0.010 0.010 0.100 0.100 0.010 0.10 ------- DIOXIN/FURAN CONGENER 1,2,3,6,7,8-HEXACHLORODIBENZOFURAN 1,2,3,7,8-PENTACHLORODIBENZO-P-DIOXIN 1,2,3,7,8-PENTACHLORODIBENZOFURAN 1,2,3,7,8,9-HEXACHLORODIBENZO-P-DIOXIN 1,2,3,7,8,9-HEXACHLORODIBENZOFURAN 2,3,4,6,7,8-HEXACHLORODIBENZOFURAN 2,3,4,7,8-PENTACHLORODIBENZOFURAN 2,3,7,8-TETRACHLORODIBENZOP-DIOXIN 2,3,7,8-TETRACHLORODIBENZOFURAN CO-PLANAR POLYCHLORINATED BIPHENYLS PCB-77 PCB-81 PCB-126 PCB-169 PCB-105 PCB-118 PCB-123 PCB-156 PCB-157 PCB-167 PBC-114 PCB-170 PCB-180 PCB-189 TEF 0.100 1.000 0.050 0.100 0.100 0.100 0.500 1.000 0.100 TEF 0.0001 0.0001 0.1 0.01 0.0001 0.0001 0.0001 0.0005 0.0005 0.00001 0.0005 0.0000 0.0000 0.0001 *Source: Van den Berg, et. al., 1998. "Toxic Equivalency Factors (TEFs) for PCBs, PCDDs, PCDFs for Humans and Wildlife/ Environmental Health Perspectives 106:775-792. ------- IV. DRY WEIGHTS OF BIOSOLIDS DISPOSED IN 1988 The dry weight of biosolids disposed by POTWs is recorded in the 1988 NSSS. This information is not available for the POTWs in the 2001 NSSS. As a point of reference, Table 4 records mean, maximum, and upper percentiles of dry weight biosolids disposed in 1988 by POTWs that practice secondary or greater treatment of wastewater. Estimates are presented by flow groups. Table 4 includes three sets of disposal statistics for each flow stratum. These sets include those POTWs in the stratum that reported zero tons of biosolids disposed. The second set excludes POTWs reporting zero biosolids disposed. Finally, since Round 2 applies to land application, the third set of disposal statistics record dry weights of biosolids disposed by those POTWs in 1988 that indicated that they used land application as their major disposal practice. Table 4 indicates that in 1988, at least half of the POTWs treating less than one million gallons of wastewater per day were less than the 290 dry weight metric tons exemption. Actually, 90 percent of the POTWs in the nation in 1988 that treated less than one million gallons of wastewater per day disposed less than 290 metric tons of biosolids annually. ------- TABLE 4: Dry Weights of Biosolids Disposed in 1988 (U.S. Tons) POTWs TREATING > 100 MGD ALL REPORTED DISPOSED (ZEROS INCLUDED) ALL REPORTED DISPOSED (ZEROS EXCLUDED) ALL LISTING LA AS A MAJOR DISPOSAL PRACTICE 46,900 48,700 25,800 27,800 28,300 15,200 150,000 151,000 69,500 235,000 236,000 87,800 262,000 262,000 92,300 POTWs TREATING > 10 MGD BUT • 100 MGD ALL REPORTED DISPOSED (ZEROS INCLUDED) ALL REPORTED DISPOSED (ZEROS EXCLUDED) ALL LISTING LA AS A MAJOR DISPOSAL PRACTICE 6,310 6,410 4,560 4,370 4,400 2,830 20,500 20,700 12,900 26,200 26,200 14,000 39,900 39,900 14,200 POTWs TREATING > 1 MGD BUT • 10 ALL REPORTED DISPOSED (ZEROS INCLUDED) ALL REPORTED DISPOSED (ZEROS EXCLUDED) ALL LISTING LA AS A MAJOR DISPOSAL PRACTICE 670 691 581 357 390 297 1,890 1,900 1,760 5,180 5,390 2,500 13,600 13,600 13,600 POTWs TREATING • «l MGD ALL REPORTED DISPOSED (ZEROS INCLUDED) ALL REPORTED DISPOSED (ZEROS EXCLUDED) ALL LISTING LA AS A MAJOR DISPOSAL PRACTICE 51.7 85.6 78 31.9 31.0 22.0 247 351 347 436 457 455 5,630 5,630 958 10 ------- V. NSSS NATIONAL SUMMARY STATISTICS—DIOXINS, FURANS, AND DIOXIN-LIKE PCB Toxic EQUIVALENT ESTIMATES This section is comprised of four subsections. Section VA describes how 2001 NSSS dioxin and dioxin like compounds were measured. It also directs the reader to appendices that list descriptive statistics across the 94 POTWs in the 2001 NSSS for each measured compound. Section VB presents tabulated national estimates of TEQs from the 2001 NSSS. Since the proposed regulation includes testing exceptions for POTWs that treat less than one million gallons of wastewater per day, Section VC reports 2001 TEQ descriptive statistics for POTWs treating less than one million gallons of wastewater and those treating more than one million gallons. Finally, Section VD presents statistical tests of differences between the national mean dioxin and furan TEQs from 1988 and 2001. VA. 2001 NSSS DIOXIN AND DIOXIN-LIKE CONCENTRATION DESCRIPTIVE STATISTICS Exhibits 1-3 in Appendix A present national summary statistics for 2001 NSSS pollutant concentrations. All units are ppt (or ng/kg). Dioxins and furans were measured using EPA method 1613B. PCBs were quantified using EPA Method 1668A. Sample volumes were adjusted according to percent solids prior to chemical analysis. For each pollutant and aggregated or total pollutants, the tables report pollutant type, unit of measure, sample size, an estimate of the national percent detect, the observed maximum, and the 99th, 98th, 95th, 90th and median percentiles estimated from empirical national, cumulative distributions of pollutant concentrations. The column labeled "Sample Size" records the number of POTWs in the NSSS from which data were used to generate the reported estimates. The exhibits differ according to the method used to account for nondetected congeners. A congener is considered a nondetection if it is not measured above the ML in a POTW's biosolids sample. Incorporating nondetected samples into national estimates is important because if they are excluded, then estimates are biased high. Exhibit 1 reports national estimates that substituted the value zero for a congener that was not measured above the ML. This set of estimates is the least conservative with respect to the environment. Exhibit 2 records national estimates with one-half the ML value incorporated for nondetected samples. Finally, the most environmentally conservative estimates are listed in Exhibit 3. These estimates incorporated a congener's ML value for those samples from which the congener was not measured above the ML. The maximum observed value of 2, 3, 7, 8 TCDD in the 2001 NSSS was 47.20 ng/kg. The 99th percentile estimate from the empirical cumulative distribution of 2, 3, 7, 8 TCDD is 5.09 ng/kg. Biosolids from 99 percent of the POTWs in 2001 measured 2, 3, 7, 8 TCDD above the ML. PCB-126, which is the coplanar PCB with the highest TEF of 0.1, was measured above the minimum value in 49 percent of the 2001 NSSS biosolids samples. The observed maximum ranges from is 503 ng/kg to 908 ng/kg for the nondetection substitutions of zero and the ML, respectively. The exhibits demonstrate that most of the congeners display large standard deviations. This indicates that the observed values of the congeners vary widely. 11 ------- VB. 2001NSSS NATIONAL SUMMARY STATISTICS—DIOXINS AND DIOXIN-LIKE PCB Toxic EQUIVALENT ESTIMATES Exhibits 4-6 in Appendix B present TEQ national summary statistics for 2001 NSSS pollutants. The WHO-98 TEFs were applied to generate TEQs. All units are ppt or ng/kg. The convention applied for nondetections, as described in Section VA, were applied when estimating TEQ summary statistics. Exhibit 4 records TEQ estimates with the value zero, entering a POTW's TEQ when a congener is not measured above the ML in a sample. Exhibits 5-6 present TEQ estimates that use the values of one-half the ML and the ML, respectively, when a congener is not measured above the ML in a sample. Total TEQs estimates from Exhibits 4-6 are listed in the following table. TABLE 5: 2001 NSSS National TEQ Estimates—Total TEQs METHOD MEAN STD. DEV. MAX. 99™ % 98™ % 95™ % 90™ % 50™ % TOTAL DIOXIN AND FURAN TEQs 0 !/2ML ML 21.70 21.70 21.80 47.5 47.5 47.5 682.00 682.00 682.00 100.00 100.00 100.00 54..40 54.40 54.40 33.30 33.30 33.30 31.40 31.60 31.70 15.50 15.50 15.50 TOTAL COPLANAR PCB TEQs 0 !/2ML ML 5.22 9.87 14.50 10.3 14.0 22.4 58.30 58.30 103.00 50.60 55.10 97.2 44.80 54.50 91.60 13.10 49.40 78.00 9.66 19.20 35.00 2.05 6.04 8.11 TOTAL DIOXIN AND DIOXIN-LIKE TEQs 0 !/2ML ML 26.90 31.60 36.30 49.6 50.0 52.7 718.00 718.00 718.00 114.00 115.00 138.00 76.60 80.10 96.00 59.30 73.50 113.00 42.80 55.10 69.10 19.70 23.40 24.00 The coplanar PCBs exhibit more nondetections than the dioxin and furans. Therefore, their estimates are more sensitive to substitution methods. The POTW with the maximum observed dioxin and furan TEQ is not the same POTW with the maximum observed coplanar PCB. Appendix C presents the empirical cumulative distributions for the 2001 TEQ estimates. 12 ------- VC. 2001NSSS NATIONAL DIOXIN AND DIOXIN-LIKE TEQs BY FLOW GROUP Because Round 2 regulations provide a testing exception for those POTWs that process less than one million gallons of wastewater per day, EPA evaluated TEQ summary statistics for this group of 2001 NSSS POTWs in comparison to those POTWs that treat more than one million gallons of wastewater per day. There are 21 POTWs in the 2001 NSSS that treat less than one million gallons of wastewater per day. These 21 sampled POTWs project to 4,854 POTWs in the Nation. The remaining 73 sampled POTWs treat more than one million gallons of wastewater per day and project to 2003 POTWs in the Nation. Table 6 presents TEQ statistics for this dichotomy of POTWs. TABLE 6: 2001 NSSS Total Dioxin and Furan and Dioxin-Like PCB National TEQ Estimates— POTWs By Flow Groups METHOD ESTIMATE MEAN STD. DEV. MAXIMUM 99™ % 98™ % 95™ % 90™ % 50™ % ZERO FOR NONDETECTS MMGD 22.10 16.8 78.60 71.80 65.10 46.00 37.20 19.90 >1MGD 38.50 86.7 718.00 401.00 265.00 62.60 54.00 18.90 y* ML FOR NONDETECTS MMGD 26.50 18.3 78.6 76.40 74.20 67.10 46.10 22.90 >1MGD 44.10 86.8 718.00 403.00 269.00 94.80 64.20 22.60 ML FOR NONDETECTS MMGD 30.80 24.6 118.00 109.00 101.00 77.00 46.60 23.80 >1MGD 49.60 88.2 718.00 406.00 276.00 134.00 86.90 25.80 These descriptive statistics illustrate the skewness of the empirical distribution of TEQs between POTWs treating less than one million gallons of wastewater per day and those treating more than one million gallons of wastewater per day. This is evidenced by the fact that the medians (50th percentiles) of the two distributions of total TEQs are very similar. However, the mean and upper percentile TEQ estimates from POTWs treating more than one million gallons of wastewater per day are higher than those that treat less than one million gallons of wastewater per day. As anticipated, values in excess of 300 ppt are from the POTWs that treat more than one million gallons of wastewater per day. The skewness of the empirical distributions of total dioxin, furan and dioxin-like TEQs for the POTWs in the two flow categories is illustrated graphically on the next page. Appendix D presents the empirical cumulative distributions. 13 ------- Empirical Cumulative Distributions 2001 National Sewage Sludge Survey Total Dioxins/Furans/PCB TEQs Non detects substituted by Zero Z .1 1 10 100 1,000 Non detects substituted by half the Minimum Level 1 10 100 1,000 Non detects substituted by the Minimum Level .1 1 10 100 1,000 POTWs > 1 mgd POTWs < 1 mgd 14 ------- VD. 1988 AND 2001 NSSS NATIONAL SUMMARY STATISTICS—DlOXINS AND DlOXIN-LIKE PCB Toxic EQUIVALENT ESTIMATES This section lists TEQ estimates from the 2001 NSSS next to those from 1988. Overlayed cumulative distributions of the TEQs from the two NSSS surveys augment the tabulated national estimates. We also present statistical tests of differences. Because coplanar PCBs were measured as aroclors in 1988, TEQ estimates and statistical tests of differences are with respect to total dioxin and furan TEQs. That is, coplanar PCB TEQs are not included in the estimates. Before comparing results from the 1988 NSSS and the 2001 NSSS, the reader should notice that differences do exist between the surveys. First of all, 13 years have elapsed between the studies. Given that the treatment in a POTW is not expected to influence the amount of dioxins in biosolids, the amount of dioxins could differ in the influent between the two studies because of the effective reduction of pollutant loads facilitated by EPA's effluent guidelines for industrial categories. Also, the samples for the 1988 NSSS were taken just prior to disposal. The biosolids samples from the 2001 NSSS were obtained after secondary treatment. Chemical analytical methods between the two studies were the same. However, in the 1988 NSSS, congeners and aroclors were measured in samples of the same size. Recorded measures were then adjusted to dry weight using the sample's percent solids. In the 2001 NSSS, percent solids in the sample were measured first and then the sample aliquot was adjusted prior to measurement. Graphical presentations included in this section suggest that dioxin TEQs from the 1988 and 2001 NSSS are not identically distributed. Side-by-side TEQ estimates using the WHO-98 TEQ factors are presented for total dioxin and furans. Additionally, the graphics stack overlaid cumulative distribution functions for each method of incorporating nondetected values. The abscissa has been standardized across all graphics. TABLE 7: Total Dioxin and Furan National TEQ Estimates METHOD ESTIMATE MEAN STD. DEV. MAXIMUM 99™ % 98™ % 95™ % 90™ % 50™ % ZERO FOR NONDETECTS 2001 21.70 47.5 682.00 100.00 54.40 33.30 31.40 15.50 1988 46.50 153.0 1870.00 450.00 402.00 301.00 56.70 5.68 Vi ML FOR NONDETECTS 2001 21.70 47.5 682.00 100.00 54.40 33.30 31.60 15.50 1988 67.30 153.0 1870.00 453.00 404.00 303.00 152.00 34.20 ML FOR NONDETECTS 2001 21.80 47.5 682.00 100.00 54.40 33.30 31.70 15.50 1988 88.20 157.00 1870.00 466.00 455.00 340.00 226.00 52.40 Both the tabulated estimates and the graphical presentation of the empirical cumulative distribution functions of total dioxin and furan TEQs suggest that the 1988 estimates are much more sensitive to the 15 ------- method for incorporating nondetected values. This implies that there are more nondetections in the 1988 study than in the 2001 NSSS. The mean value of the 2001 NSSS is fairly consistent across substitution methods while the mean from 1988 changes with each method. The graphics and estimates also indicate that the 1988 NSSS is more variable than the 2001 NSSS. The greater variability in 1988 is illustrated by both the sensitivity to handling nondetections which are on the low end of the distribution and the higher extreme values at the upper part of the distributions. Two POTWs in the 2001 NSSS exceed the Round 2 limitation of 300 ppt. Approximately 5 percent of the 7,714 POTWs in 1988 would have exceeded the proposed Round 2 limitation of 300 ppt TEQs just based on total dioxin and furan TEQ without the coplanar PCBs. To apply statistical tests of differences, EPA created a variable to record for each POTW in both NSSS surveys—the difference between 1988 and 2001 TEQs. Paired statistical tests of differences indicate that total dioxin and furan TEQs are statistically different. The total mean TEQ from 1988 is statistically higher than that from 2001. The attained significance value for these tests are p=(0.0203, 0.0002, <0.0001) when zero, 1A ML, and the ML are substituted for congeners or aroclors not measured above the ML in the sample. If tests of differences are viewed at the flow rate stratum level, it is usually the POTWs treating one million gallons of wastewater per day or less that display statistically significant differences, with the 2001 mean TEQ being statistically less than the TEQ mean from the 1988 NSSS. 16 ------- Empirical Cumulative Distributions for 1988 and 2001 National Sewage Sludge Surveys Total Dioxins/Furans TEQs Non detects substituted by Zero .000001 .00001 .0001 .001 .01 .1 1 10 100 1,000 10,000 Non detects substituted by half the Minimum Level JL .000001 .00001 .0001 .001 .01 .1 1 10 100 1,000 10,000 Non detects substituted by the Minimum Level .000001 .00001 .0001 .001 .01 .1 1 10 100 1,000 10,000 1988 2001 Using WHO set of TEQs 17 ------- VI. SELF-MONITORING DATA OVER TIME Three POTWs submitted monthly dioxin, furan and dioxin-like PCB self-monitoring TEQs to the EPA. Data from two POTWs span from 1999 through 2001. One of these POTWS reported TEQs for two of their products. The third POTW reported self-monitoring TEQs from December, 1991 through October, 2000. At monthly intervals, the POTWs recorded the TEQ by congener or aroclor and total TEQs. Along with the congener/aroclor TEQ, the TEFs were reported. This section presents data conventions and statistical results across time from each of these three POTWs. Section VIA of this report characterizes the submitted self-monitoring data. Data conventions and standardizations were applied to the self-monitoring data to ensure comparability across facilities and to EPA's NSSS. Section VIB details these conventions. TEQ estimates, using each of the three substitution methods for aroclors or congeners that were not measured above the ML in a sample, are presented in Section VIC. We tabulate estimates first for total dioxin and furan TEQs, then for total dioxin-like PCB TEQs, and finally for total dioxin, furan, and dioxin-like PCB TEQs. These tabulated estimates are augmented by graphical presentations of TEQs overtime. Section VIC also provides a discussion of the results. VIA. SELF-MONITORING DATA EPA received self-monitoring data in spreadsheets. Included in the spreadsheets were the monthly indicators and TEQs at the congener/aroclor level. Also provided in the spreadsheets were listings of the TEQ values used to generate TEQs. Table 8 provides a characterization of the submitted self-monitoring data. TABLE 8: Number and Type of Self-monitoring Data SOURCE POTW 1 POTW 2 MlLORGANITE AGRI-LIFE PERIOD OF TIME MONTH/YEAR 12/91-10/00 7/99-5/01 4/99-6/01 10/99-7/01 MONTHS 90 24 17 14 TEF SOURCE* WHO-94 WHO-98 WHO-98A WHO-98A TREATMENT OF NONDETECTIONS !/2*MDL 0 0 0 TOTAL TEQs INCLUDE DIOXIN AND FURANS ONLY D/F 7/99- 1/00 D/F/PCB -2/00 D/F/PCBS D/F/PCBS * Please notice that the difference between the WHO-94 and WHO-98 TEQ factors occurs for 1,2,3,7,8-PeCDD. The WHO-94 factor is 0.5 while the WHO-98 factor is 1.0. A Milorganite and Agri-Life TEQs were calculated with modified WHO-98 TEFs. The difference is that OCDD and OCDF are weighted as 0.001—which is the WHO-94 weight not the WHO-98 factor which is 0.0001. 18 ------- VIB. DATA CONVENTIONS APPLIED TO SELF-MONITORING DATA To facilitate comparability of these self monitoring data to each other and to EPA's NSSS, EPA standardized TEQs to use the WHO-98 TEQs reported by Van den Berg et. al. These TEFs are recorded on Table 3 of this report. Across self-monitoring data submitted to EPA, the convention for incorporated congeners or aroclors that were not measured about the ML was inconsistent. Congeners or aroclor that are not measured about the ML in a sample are referred to as "censored or nondetects." The following paragraphs delineate how each POTW recorded censored data and EPA's technical approach to determining the MLs for each set of self-monitoring data. POTW_1 reported monthly TEQs by congener or aroclor. The spreadsheets also listed TEFs. Cell entries recorded in red indicated that the TEQ was censored and that one-half the ML was used to derive the congener's TEQ. Cell entries recorded in blue indicated that the TEQ was derived from a congener measurement that was above the ML. These blue TEQs are "non-censored." Thus, for the red cell entries indicating censored TEQs, the EPA applied the following relationship to determine the ML. If TEQt = \l2MLt* TEFt then MLt= TEQi*2ITEFr. These MLs were determined electronically and added to the POTW_1 database. POTW_2 recorded the ML, the measured concentration, and the TEQ by congener for each month. Milorganite and Agri-Life are products produced by the third POTW. Spreadsheets for these products indicated that the value zero was used for monthly censored congener TEQs. To determine MLs in these instances, EPA obtained their contract analytical laboratory sheets for each monthly analysis. ML values from the laboratory sheets were entered into an electronic database for censored data. Once TEFs had been standardized and MLs were electronically available for the three POTWs, EPA created three sets of TEQs by congener/aroclor for each POTW. The sets differed only by the values used when data were censored. Congeners or aroclors measured above the ML in a sample are treated identically in all three sets of data. That is, the measured concentration of the congener is multiplied by the congener's TEF to yield the monthly congener TEQ. In the first set, the value of the censored congener's ML was multiplied by the congener's TEF to determine a TEQ. Estimates using this method are labeled as "Nondetects set to ML". The second method set nondetected congener values to one-half the ML. These estimates are labeled "1A ML." The final set of TEQs set nondetected congeners/aroclors to zero. Total monthly TEQs for each facility were then determined by summing the congener/aroclor TEQs for that month. This method is described in Section IIIB of this report. VIC. SELF-MONITORING SUMMARY STATISTICS—DIOXINS, FURANS, AND DIOXIN-LIKE PCB Toxic EQUIVALENT ESTIMATES In order to evaluate performance across the three POTWs, in this section of the report we present total TEQ estimates first for total dioxins and furans, then for total dioxin-like PCBs, and finally for total dioxin/furan and dioxin-like PCBs TEQs. Within each set of total estimates, we tabulate mean, median, 19 ------- maximum, and upper percentile estimates of TEQs for the three POTWs. The tables presenting the data are grouped by the method designating the values used for nondetected or censored data. These statistics were generated arithmetically. Graphical presentations augment each table. Total Dioxin and Fur an TEQs Tables 9 though 11 present summary statistics for total dioxin and furan TEQs for each of the three POTWs. Table 9 reports TEQ statistics when nondetected data have been set to zero. In that instance, the nondetected or censored congener/aroclor does not add to the TEQ. Table 10 presents estimates that incorporate one-half the ML value for those congeners not measured in a sample. Finally, estimates that use the ML value for censored data are tabulated in Table 11. Consistently, POTW_l's statistics exceed those of the other two POTWs. In particular, Table 9 shows a maximum value for POTW_1 approximately four-fold higher than that of the other POTWs. In Table 9, only detected congeners or aroclors contribute to the TEQ as the value zero is used for censored data. The maximum value for the scenario where zero is substituted for the concentration when a congener or aroclor is not measured above the ML occurred in November 1992. That maximum value was predominantly caused by a high measured value for OCDD. For POTW_1, all values from March 1992 through May 1993 report total dioxin and furan TEQs of 100 ppt or greater. Four exceed 200 ppt. POTW_1 reported total dioxin and furan TEQs of 100 or more in only in 3 months out of 75 months (4 percent) after May 1993. These occurred in July 1993 (133 ppt), November 1994 (107ppt), and May 1995 (174 ppt). After May 1995, the highest total dioxin and furan TEQ observed for the scenario of entering zero for censored values is 77 ppt. This is more in range with the maximum TEQs observed by the other POTWs. Tables 10 and 11 illustrate the same pattern as Table 9. When the ML is used for those congeners that are not measured above the ML, the maximum TEQ recorded by POTW_1 is 325 ppt. This TEQ occurred in November 1994, and was caused by a high measured value of OCDD. The November 1994 POTW_1 record is the only occurrence of total dioxin and furan TEQs exceeding the proposed limit of 300 ppt. Total Dioxin-Like PCB TEQs POTW_1 did not report dioxin-like PCBs. Tables 12, 13, and 14 record descriptive statistics for two POTWs. The highest observed TEQ when nondetected aroclors are set to zero occurs in Agri-Life. This value was measured in April 2000. A majority of the aroclors were measured above the ML in this sample. When the ML values are substituted for aroclors not measured above the ML, the maximum TEQ occurs at 45 ppt. This measurement was reported by Agri-Life in October 2001. The TEQ value for this sample, when zero was substituted from those aroclors not measured above the ML, is 2.5. This difference in TEQs from the same sample indicates that the majority of aroclors were not measured above the ML. As Tables 12 through 14 suggest and the accompanying graphics illustrate, dioxin-like PCB TEQs are fairly consistent over time. Milorganite displayed the least variation in TEQs while Agri-Life's variation in TEQs was the highest among the three POTWs. 20 ------- Total Dioxin, Furan and Dioxin-Like PCB TEQs The maximum observed total TEQ occurs in November 1994. This value of 325 ppt is based on only dioxin and furan TEQs, since POTW_1 did not report dioxin-like PCBs. For the other two POTWs, most other total TEQ descriptive statistics are less than 100 ppt. After 1995, POTW_l's total TEQs are similar to those reported by the other three POTWs. All three POTWs reported total TEQs that would require them to monitor. 21 ------- TABLE 9: Total Dioxin and Furan TEQs Nondetected Values Set to Zero METHOD ESTIMATE MEAN STD. DEV. MAXIMUM 99™ % 98™ % 95™ % 90™ % 50™ % POTW 1 62.2 59.1 265.0 250.00 240.0 189.0 152.0 39.5 POTW 2 13.7 11.5 44.1 41.7 39.3 33.5 30.2 9.39 MlLORGANITE 17.9 16.3 65.6 62.4 59.3 49.8 32.4 14.4 AGRI-LIFE 13.5 9.73 26.7 26.6 26.5 26.3 25.9 9.88 22 ------- TOTAL DIOXIN and FURAN TEQs Over Time NonDetected Values set to ZERO O LU 700 - 600 - 500 - 400 - 300 - 200 - 100 - 0 - 100 0 ' 1/00 1/01 1/92 1/93 1/94 1/95 1/96 1/97 1/98 1/99 1/00 1/01 1/02 — + POTW 2 Year • — • Agri-Life • — • Milorganite A — A POTWJ Notes: TEQs incorporate WHO-98 Toxic Equivalent Factors. Total TEQs for POTW_1 are TOTAL Dioxin and Furan TEQs only. Beginning February 2000, POTW 2's TEQs include Dioxin-like PCBs in addition to Dioxin and Furan TEQs. 23 ------- TABLE 10: Total Dioxin and Furan TEQs Nondetected Values Set to Vz ML METHOD ESTIMATE MEAN STD. DEV. MAXIMUM 99™ % 98™ % 95™ % 90™ % 50™ % POTW_1 69.0 58.6 265.0 250.0 240.0 208.0 157.0 46.1 POTW_2 15.4 11.0 47.3 44.2 41.2 33.9 30.9 11.6 MlLORGANITE 19.6 16.5 69.6 66.1 62.7 52.2 33.6 15.2 AGRI-LIFE 28.3 14.5 50.5 49.4 48.2 44.9 41.3 23.8 24 ------- TOTAL DIOXIN and FURAN TEQs Over Time NonDetected Values set to 1/2 ML O LU 700 - 600 - 500 - 400 - 300 - 200 - 100 - 0 - 100 • 0 • 1/00 1/01 1/92 1/93 1/94 1/95 1/96 1/97 1/98 1/99 1/00 1/01 1/02 • — A POTW 1 ' — «• POTW 2 Year • — • Agri-Life • — • Milorganite Notes: TEQs incorporate WHO-98 Toxic Equivalent Factors. Total TEQs for POTW_1 are TOTAL Dioxin and Furan TEQs only. Beginning February 2000, POTW 2's TEQs include Dioxin-like PCBs in addition to Dioxin and Furan TEQs. 25 ------- TABLE 11: Total Dioxin and Furan TEQs Nondetected Values Set to ML METHOD ESTIMATE MEAN STD. DEV. MAXIMUM 99™ % 98™ % 95™ % 90™ % 50™ % POTW_1 75.7 60.9 325.0 271.0 252.0 209.0 157.0 53.3 POTW_2 17.2 11.0 50.5 46.8 43.1 34.4 31.7 12.4 MlLORGANITE 21.4 16.8 73.6 69.8 66.0 54.7 34.8 17.1 AGRI-LIFE 43.2 24.7 95.7 92.6 89.5 80.3 68.8 38.3 26 ------- TOTAL DIOXIN and FURAN TEQs Over Time NonDetected Values set to ML O LU 700 - 600 - 500 - 400 - 300 - 200 - 100 - 0 - 1/92 1/93 1/94 1/95 1/96 1/97 1/98 1/99 1/00 1/01 1/02 ' — «• POTW 2 Year • — • Agri-Life • — • Milorganite A — A POTWJ Notes: TEQs incorporate WHO-98 Toxic Equivalent Factors. Total TEQs for POTW_1 are TOTAL Dioxin and Furan TEQs only. Beginning February 2000, POTW 2's TEQs include Dioxin-like PCBs in addition to Dioxin and Furan TEQs. 27 ------- TABLE 12: Total Dioxin-like PCB TEQs Non detected Values Set to Zero METHOD ESTIMATE MEAN STD. DEV. MAXIMUM 99™ % 98™ % 95™ % 90™ % 50™ % POTW_2 4.34 3.35 10.7 10.2 9.72 8.18 7.71 5.03 MlLORGANITE 6.04 2.19 10.3 9.98 9.65 8.67 8.29 6.15 AGRI-LIFE 8.7 7.85 25.3 24.5 23.7 21.4 18.1 4.62 No PCB data exists for POTW 1 28 ------- TOTAL DIOXIN-LIKE PCB TEQs Over Time NonDetected Values set to ZERO O LU 700 - 600 - 500 - 400 - 300 - 200 - 100 - 0 - 100 • o • 1/00 1/01 1/92 1/93 1/94 1/95 1/96 1/97 1/98 1/99 1/00 1/01 1/02 ' — «• POTW 2 Year • — • Agri-Life • — • Milorganite A — A POTWJ Notes: TEQs incorporate WHO-98 Toxic Equivalent Factors. Total TEQs for POTW_1 are TOTAL Dioxin and Furan TEQs only. Beginning February 2000, POTW 2's TEQs include Dioxin-like PCBs in addition to Dioxin and Furan TEQs. 29 ------- TABLE 13: Total Dioxin-like PCB TEQs Nondetected Values Set to Vz ML METHOD ESTIMATE MEAN STD. DEV. MAXIMUM 99™ % 98™ % 95™ % 90™ % 50™ % POTW_2 6.53 4.18 18.6 17.3 16.0 12.2 10.8 5.91 MlLORGANITE 6.42 1.74 10.5 10.2 9.82 8.73 8.36 6.18 AGRI-LIFE 11.3 8.19 25.5 25.2 25.0 24.3 22.2 10.9 No PCB data exists for POTW 1 30 ------- TOTAL DIOXIN-LIKE PCB TEQs Over Time NonDetected Values set to 1/2 ML O LU 700 - 600 - 500 - 400 - 300 - 200 - 100 - 0 - 100 • 0 • 1/00 1/01 1/92 1/93 1/94 1/95 1/96 1/97 1/98 1/99 1/00 1/01 1/02 ' — «• POTW 2 Year • — • Agri-Life • — • Milorganite A — A POTWJ Notes: TEQs incorporate WHO-98 Toxic Equivalent Factors. Total TEQs for POTW_1 are TOTAL Dioxin and Furan TEQs only. Beginning February 2000, POTW 2's TEQs include Dioxin-like PCBs in addition to Dioxin and Furan TEQs. 31 ------- TABLE 14: Total Dioxin-like PCB TEQs Nondetected Values Set to ML METHOD ESTIMATE MEAN STD. DEV. MAXIMUM 99™ % 98™ % 95™ % 90™ % 50™ % POTW_2 8.73 7.93 35.2 32.7 30.3 22.9 14.2 5.95 MlLORGANITE 6.8 1.6 10.8 10.4 9.99 8.8 8.43 6.56 AGRI-LIFE 13.9 11.9 45.0 42.3 39.6 31.5 24.7 11.0 No PCB data exists for POTW 1 32 ------- TOTAL DIOXIN-LIKE PCB TEQs Over Time NonDetected Values set to ML O LU 700 - 600 - 500 - 400 - 300 - 200 - 100 - 0 - 100 • o • 1/00 1/01 1/92 1/93 1/94 1/95 1/96 1/97 1/98 1/99 1/00 1/01 1/02 ' — «• POTW 2 Year • — • Agri-Life • — • Milorganite A — A POTWJ Notes: TEQs incorporate WHO-98 Toxic Equivalent Factors. Total TEQs for POTW_1 are TOTAL Dioxin and Furan TEQs only. Beginning February 2000, POTW 2's TEQs include Dioxin-like PCBs in addition to Dioxin and Furan TEQs. 33 ------- TABLE 15: Total Dioxin, Furan and Dioxin-like PCB TEQs Nondetected Values Set to Zero METHOD ESTIMATE MEAN STD. DEV. MAXIMUM 99™ % 98™ % 95™ % 90™ % 50™ % POTW_1 62.2 59.1 265.0 250.0 240.0 189.0 152.0 39.5 POTW_2 16.8 13.2 44.8 43.6 42.4 39.7 38.8 14.0 MlLORGANITE 23.9 16.7 71.3 68.6 65.9 57.7 39.6 19.5 AGRI-LIFE 22.2 14.1 44.6 44.2 43.9 42.9 39.8 22.4 34 ------- TOTAL DIOXIN, FURAN and DIOXIN-LIKE PCB TEQs Over Time NonDetected Values set to ZERO a LU 700 - 600 - 500 - 400 - 300 - 200 - 100 - 0 - 100 • 0 • 1/00 1/01 1/92 1/93 1/94 1/95 1/96 1/97 1/98 1/99 1/00 1/01 1/02 • — A POTW 1 ' — «• POTW 2 Year • — • Agri-Life • — • Milorganite Notes: TEQs incorporate WHO-98 Toxic Equivalent Factors. Total TEQs for POTW_1 are TOTAL Dioxin and Furan TEQs only. Beginning February 2000, POTW 2's TEQs include Dioxin-like PCBs in addition to Dioxin and Furan TEQs. 35 ------- TABLE 16: Total Dioxin, Furan and Dioxin-like PCB TEQs Nondetected Values Set to Vz ML METHOD ESTIMATE MEAN STD. DEV. MAXIMUM 99™ % 98™ % 95™ % 90™ % 50™ % POTW_1 69.0 58.6 265.0 250.0 240.0 208.0 157.0 46.1 POTW_2 20.1 14.0 58.0 54.0 50.1 41.2 39.6 15.5 MlLORGANITE 26.1 16.8 75.4 72.3 69.3 60.2 40.8 21.6 AGRI-LIFE 39.7 21.2 76.0 73.8 71.6 65.1 59.8 35.4 36 ------- TOTAL DIOXIN, FURAN and DIOXIN-LIKE PCB TEQs Over Time NonDetected Values set to 1/2 ML O LU 700 - 600- 500 - 400- 300 - 200 - 100 - 0 - 100 • 0 • 1/00 1/01 1/92 1/93 1/94 1/95 1/96 1/97 1/98 1/99 1/00 1/01 1/02 — * POTW 2 Year • —• Agri-Life • — • Milorganite A —A poiWJ Notes: TEQs incorporate WHO-98 Toxic Equivalent Factors. Total TEQs for POTW_1 are TOTAL Dioxin and Furan TEQs only. Beginning February 2000, POTW 2's TEQs include Dioxin-like PCBs in addition to Dioxin and Furan TEQs. 37 ------- TABLE 17: Total Dioxin, Furan and Dioxin-like PCB TEQs Nondetected Values Set to ML METHOD ESTIMATE MEAN STD. DEV. MAXIMUM 99™ % 98™ % 95™ % 90™ % 50™ % POTW_1 75.7 60.9 325.0 271.0 252.0 209.0 157.0 53.3 POTW_2 23.4 16.0 71.3 67.4 63.5 52.7 42.4 18.1 MlLORGANITE 28.2 17.0 79.4 76.0 72.7 62.7 42.0 23.1 AGRI-LIFE 57.1 32.3 121.0 117.0 113.0 101.0 88.8 48.5 38 ------- TOTAL DIOXIN, FURAN and DIOXIN-LIKE PCB TEQs Over Time NonDetected Values set to ML O LU 700 - 600 - 500 - 400 - 300 - 200 - 100 - 0 - 1/92 1/93 1/94 1/95 1/96 1/97 1/98 1/99 1/00 1/01 1/02 ' — «• POTW 2 Year • — • Agri-Life • — • Milorganite A — A POTWJ Notes: TEQs incorporate WHO-98 Toxic Equivalent Factors. Total TEQs for POTW_1 are TOTAL Dioxin and Furan TEQs only. Beginning February 2000, POTW 2's TEQs include Dioxin-like PCBs in addition to Dioxin and Furan TEQs. 39 ------- ------- APPENDIX A: NATIONAL POLLUTANT CONCENTRATION PERCENTILE ESTIMATES FROM THE 2001 NATIONAL SEWAGE SLUDGE SURVEY Exhibit 1—Nondetects Set to Zero Dioxin and Furans A-l PCBs A-2 Totals A-9 Exhibit 2—Nondetects Set to One-half ML Dioxin and Furans A-10 PCBs A-ll Totals A-18 Exhibit 3—Nondetects set to ML Dioxin and Furans A-19 PCBs A-20 Totals A-27 41 ------- EXHIBIT 1 : NATIONAL POLLUTANT CONCENTRATION PERCENTILE ESTIMATES FROM THE 2001 NATIONAL SEWAGE SLUDGE SURVEY Nonparametric Substitution Method Estimation Procedure-Nondetects Set to zero group=Dioxins and Furans Pollutant Unit Sample Size Percent Detect Standard Deviation Observed Maximum 99th Percentile 98th Percentile 95th Percentile 90th Percentile Median NG/KG 1,2 .4,6,7,8-HEPTACHLORODIBENZOFURAN 99 1,2 .4,7,8,9-HEPTACHLORODIBENZOFURAN ,4,7,8-HEXACHLORODIBENZO-P-DIOXIN 99 124.00 1,2, ,4,7,8-HEXACHLORODIBENZOFURAN 1,2,3,6,7,8-HEXACHLORODIBENZO-P-DIOXIN 1,2,3,6,7,8-HEXACHLORODIBENZOFURAN 1,2,3,7,8,9-HEXACHLORODIBENZO-P-DIOXIN 1,2,3,7,8,9-HEXACHLORODIBENZOFURAN 1,2,3,7,8-PENTACHLORODIBENZOFURAN 93 189.00 2,3,4,7,8-PENTACHLORODIBENZOFURAN 2,3,7,8-TETRACHLORODIBENZO-P-DIOXIN 99 47.20 OCTACHLORODIBENZO-P-DIOXIN OCTACHLORODIBENZOFURAN A-l ------- EXHIBIT 1 : NATIONAL POLLUTANT CONCENTRATION PERCENTILE ESTIMATES FROM THE 2001 NATIONAL SEWAGE SLUDGE SURVEY Nonparametrie Substitution Method Estimation Procedure -Nondetects Set to zero group=PCBs Pollutant Unit Sample Size Percent Detect Standard Deviation Observed Maximum 99th Percentile 98th Percentile 95th Percentile 90th Percentile Median DECACHLORO BIPHENYL PCB- PCB- PCB-104 PCB-105 PCB-106 PCB-107+PCB-124 PCB-109 PCB-11 PCB-110+PCB-115 PCB-111 PCB-112 PCB-114 PCB-118 PCB-12+PCB-13 PCB-120 PCB-121 PCB-122 PCB-123 PCB-126 PCB-127 PCB-128+PCB-166 PCB-129+PCB-138+PCB-160+PCB-163 PCB-130 PCB-131 94 94 94 100 94 NG/KG 94 94 94 94 94 100 NG/KG 94 A-2 ------- EXHIBIT 1 : NATIONAL POLLUTANT CONCENTRATION PERCENTILE ESTIMATES FROM THE 2001 NATIONAL SEWAGE SLUDGE SURVEY Nonparametrie Substitution Method Estimation Procedure -Nondetects Set to zero group=PCBs (continued) Pollutant Sample Size Percent Detect Standard Deviation Observed Max imum 99th Percentile 98th Percentile 95th Percentile 90th Percentile PCB- PCB- PCB-134+PCB-143 PCB-135+PCB-151+PCB-154 PCB-136 PCB-137 PCB-139+PCB-140 PCB-14 PCB- PCB- PCB- PCB- PCB-146 PCB-147+PCB-149 PCB-148 PCB-15 PCB-150 PCB-152 PCB-153+PCB-168 PCB-155 PCB-156+PCB-157 PCB-158 PCB-159 PCB-16 PCB-161 'CB-141 'CB-144 'CB-14: 4.74 98 A-3 ------- EXHIBIT 1 : NATIONAL POLLUTANT CONCENTRATION PERCENTILE ESTIMATES FROM THE 2001 NATIONAL SEWAGE SLUDGE SURVEY Nonparametrie Substitution Method Estimation Procedure -Nondetects Set to zero group=PCBs (continued) Pollutant Unit Sample Size Percent Detect Standard Deviation Observed Maximum 99th Percentile 98th Percentile 95th Percentile 90th Percentile Median PCB- PCB- PCB- PCB- PCB-170 PCB-171+PCB-173 PCB-172 PCB-174 PCB-175 PCB-176 PCB-177 PCB-178 ?CB-179 PCB-18+PCB-30 PCB-180+PCB-193 PCB-181 PCB-182 PCB-183+PCB-185 PCB-184 PCB-186 PCB-187 PCB-188 PCB-189 'CB-17 A-4 ------- EXHIBIT 1 : NATIONAL POLLUTANT CONCENTRATION PERCENTILE ESTIMATES FROM THE 2001 NATIONAL SEWAGE SLUDGE SURVEY Nonparametrie Substitution Method Estimation Procedure -Nondetects Set to zero group=PCBs (continued) Pollutant Unit Sample Size Percent Detect Standard Deviation Observed Maximum 99th Percentile 98th Percentile 95th Percentile 90th Percentile Median 99 PCB-197+PCB-200 99 A-5 ------- EXHIBIT 1 : NATIONAL POLLUTANT CONCENTRATION PERCENTILE ESTIMATES FROM THE 2001 NATIONAL SEWAGE SLUDGE SURVEY Nonparametrie Substitution Method Estimation Procedure -Nondetects Set to zero group=PCBs (continued) EOLLUTANT ECB-26+ECB-29 ECB-27 ECB-3 ECB-31 ECB-32 ECB-34 ECB-35 ECB-36 ECB-37 ECB-38 ECB-39 ECB-4 ECB-40+ECB-41+ECB-71 ECB-4 2 ECB-4 3 ECB-44+ECB-47+ECB-65 ECB-45+ECB-51 ECB-4 6 ECB-4 8 ECB-4 9+ECB-69 ECB-5 ECB-50+ECB-53 ECB-52 ECB-54 ECB-55 UNIT UG/KG UG/KG UG/KG UG/KG UG/KG UG/KG UG/KG UG/KG UG/KG UG/KG UG/KG UG/KG UG/KG UG/KG UG/KG UG/KG UG/KG UG/KG UG/KG UG/KG UG/KG UG/KG UG/KG UG/KG UG/KG SAMPLE SIZE 94 94 94 94 94 94 94 94 94 94 94 94 94 94 94 94 94 94 94 94 94 94 94 94 94 EOTWs 6857 6857 6857 6857 6857 6857 6857 6857 6857 6857 6857 6857 6857 6857 6857 6857 6857 6857 6857 6857 6857 6857 6857 6857 6857 EERCENT DETECT 100 100 99 100 100 74 100 100 100 36 99 96 100 100 96 100 100 100 100 100 66 100 100 91 77 MEAN 641.00 202.00 118.00 3840.00 882.00 12.40 242.00 66.00 1430.00 3.93 30.10 447.00 3560.00 1870.00 223.00 7180.00 998.00 349.00 1060.00 4270.00 18.00 786.00 9640.00 14.40 50.90 STANDARD DEVIATION 1010.00 304.00 227.00 5720.00 1420.00 23.00 1200.00 52.00 2430.00 13.00 48.80 1230.00 7690.00 4210.00 392.00 14300.00 1760.00 641.00 1870.00 8670.00 48.70 1480.00 15700.00 71.30 67.60 OBSERVED MAXIMUM 8170.00 2140.00 3670.00 46100.00 10400.00 196.00 44500.00 523.00 12200.00 124.00 255.00 13700.00 41400.00 22700.00 1860.00 76300.00 9960.00 3180.00 9110.00 46200.00 492.00 7240.00 81200.00 2980.00 387.00 99TH EERCENTILE 3770.00 1630.00 643.00 17900.00 4710.00 95.40 727.00 176.00 11500.00 57.30 234.00 5030.00 35200.00 19200.00 1850.00 65100.00 8290.00 3140.00 9010.00 39500.00 216.00 7010.00 71900.00 86.90 232.00 98TH EERCENTILE 3060.00 915.00 616.00 16100.00 4640.00 90.70 532.00 173.00 10800.00 48.60 230.00 2300.00 29100.00 15600.00 1830.00 53900.00 8280.00 3090.00 8910.00 32800.00 75.10 6770.00 62600.00 83.50 225.00 95TH EERCENTILE 2210.00 902.00 502.00 13400.00 3880.00 47.90 434.00 155.00 4900.00 21.70 103.00 1530.00 12500.00 7100.00 1080.00 26300.00 3870.00 1440.00 3920.00 15900.00 67.00 3720.00 33700.00 62.60 195.00 90TH EERCENTILE 1670.00 564.00 383.00 12800.00 2530.00 24.70 396.00 144.00 3520.00 5.40 53.80 1020.00 6640.00 2960.00 419.00 11200.00 2420.00 782.00 2540.00 6110.00 44.50 1320.00 16200.00 27.30 136.00 MEDIAN 303.00 117.00 28.90 1900.00 458.00 5.72 179.00 49.80 699.00 0.00 15.20 149.00 1390.00 680.00 92.60 2890.00 391.00 143.00 450.00 1780.00 2.77 304.00 4750.00 4.49 22.00 A-6 ------- EXHIBIT 1 : NATIONAL POLLUTANT CONCENTRATION PERCENTILE ESTIMATES FROM THE 2001 NATIONAL SEWAGE SLUDGE SURVEY Nonparametrie Substitution Method Estimation Procedure -Nondetects Set to zero group=PCBs (continued) Pollutant Unit Sample Size Percent Detect Standard Deviation Observed Maximum 99th Percentile 98th Percentile 95th Percentile 90th Percentile Median 71 PCB-58 PCB-59+PCB-62+PCB-75 PCB-6 PCB-60 PCB-61+PCB-70+PCB-74+PC: PCB-63 PCB-64 PCB-66 PCB-67 PCB-68 ?CB-7 PCB-72 ?CB-73 PCB-77 PCB-78 PCB-79 PCB-8 PCB-80 PCB-81 PCB-82 ?CB-83+PCB-99 PCB-84 PCB-85+PCB-116+PCB-117 99 93 A-7 ------- EXHIBIT 1 : NATIONAL POLLUTANT CONCENTRATION PERCENTILE ESTIMATES FROM THE 2001 NATIONAL SEWAGE SLUDGE SURVEY Nonparametrie Substitution Method Estimation Procedure -Nondetects Set to zero group=PCBs (continued) EOLLUTANT ECB-86+ECB-87+ECB-97+ECB-108+ECB-119+ECB-125 ECB-88+ECB-91 ECB-89 ECB-9 ECB-90+ECB-101+ECB-113 ECB-92 ECB-93+ECB-95+ECB-98+ECB-100+ECB-102 ECB-94 ECB-96 UNIT flG/KG flG/KG flG/KG flG/KG flG/KG flG/KG flG/KG flG/KG flG/KG SAMPLE SIZE 94 94 94 94 94 94 94 94 94 EOTWs 6857 6857 6857 6857 6857 6857 6857 6857 6857 EERCENT DETECT 100 100 99 96 100 100 100 93 99 MEAN 8200.00 1440.00 130.00 60.00 11300.00 1980.00 8940.00 53.30 72.10 STANDARD DEVIATION 11200.00 1960.00 259.00 156.00 14100.00 2270.00 10700.00 90.90 107.00 OBSERVED MAXIMUM 60300.00 10500.00 1450.00 1600.00 71600.00 13700.00 53600.00 1370.00 643.00 99TH EERCENTILE 52500.00 9650.00 1220.00 594.00 69300.00 10300.00 52900.00 381.00 544.00 98TH EERCENTILE 44800.00 8800.00 982.00 275.00 67000.00 9330.00 52200.00 359.00 520.00 95TH EERCENTILE 19500.00 3350.00 303.00 255.00 27900.00 4930.00 21800.00 131.00 167.00 90TH EERCENTILE 15300.00 2870.00 202.00 105.00 25700.00 4450.00 18900.00 87.20 133.00 MEDIAN 4580.00 774.00 64.10 17.20 6590.00 1230.00 5290.00 29.70 39.60 A-8 ------- EXHIBIT 1 : NATIONAL POLLUTANT CONCENTRATION PERCENTILE ESTIMATES FROM THE 2001 NATIONAL SEWAGE SLUDGE SURVEY Nonparametrie Substitution Method Estimation Procedure -Nondetects Set to zero group=TOTALS EOLLUTANT PCBA PCBB TOTAL DICHLORO BIEHENYLS TOTAL HEETACHLORO BIEHENYLS TOTAL HEXACHLORO BIEHENYLS TOTAL MONOCHLORO BIEHENYLS TOTAL NONACHLORO BIEHENYLS TOTAL OCTACHLORO BIEHENYLS TOTAL ECBS TOTAL EENTACHLORO BIEHENYLS TOTAL TETRACHLORO BIEHENYLS TOTAL TRICHLORO BIEHENYLS DIOXINSA DIOXINSB UHIT UG/KG UG/KG UG/KG UG/KG UG/KG UG/KG UG/KG UG/KG UG/KG UG/KG UG/KG UG/KG UG/KG UG/KG SAMPLE SIZE 94 94 94 94 94 94 94 94 94 94 94 94 94 94 EOTWs 6857 6857 6857 6857 6857 6857 6857 6857 6857 6857 6857 6857 6857 6857 EERCENT DETECT 0 100 100 100 100 100 100 100 100 100 100 100 0 100 MEAN 249000.00 249000.00 14200.00 20000.00 50700.00 275.00 1590.00 6040.00 249000.00 74100.00 61000.00 19800.00 8320.00 8320.00 STANDARD DEVIATION 478000.00 478000.00 338000.00 28000.00 58000.00 1190.00 2190.00 7340.00 478000.00 97100.00 125000.00 30400.00 45000.00 45000.00 OBSERVED MAXIMUM 18400000.00 18400000.00 17500000.00 376000.00 516000.00 32500.00 11800.00 92900.00 18400000.00 516000.00 681000.00 244000.00 525000.00 525000.00 99TH EERCENTILE 1660000.00 1660000.00 61500.00 108000.00 243000.00 2010.00 10900.00 28900.00 1660000.00 457000.00 576000.00 100000.00 37200.00 37200.00 98TH EERCENTILE 1630000.00 1630000.00 26500.00 102000.00 217000.00 938.00 9910.00 28000.00 1630000.00 399000.00 472000.00 84800.00 15300.00 15300.00 95TH EERCENTILE 520000.00 520000.00 12400.00 69400.00 153000.00 903.00 4330.00 18200.00 520000.00 174000.00 213000.00 76900.00 9100.00 9100.00 90TH EERCENTILE 498000.00 498000.00 7040.00 35000.00 122000.00 672.00 2720.00 15000.00 498000.00 146000.00 92300.00 61100.00 8890.00 8890.00 MEDIAN 131000.00 131000.00 2860.00 13000.00 30500.00 81.70 888.00 3820.00 131000.00 42100.00 24800.00 9530.00 3350.00 3350.00 A-9 ------- EXHIBIT 2 : NATIONAL POLLUTANT CONCENTRATION PERCENTILE ESTIMATES FROM THE 2001 NATIONAL SEWAGE SLUDGE SURVEY Nonparametrie Substitution Method Estimation Procedure -Nondetects Set to H ML group=Dioxins and Furans POLLUTANT 1,2,3,4,6,7,8 -HEETACHLORODIBENZO-E-DIOXIN 1,2,3,4,6,7,8 -HEETACHLORODIBENZOFURAN 1 ,2 ,3 ,4 ,7 ,8 ,9-HEETACHLORODIBENZOFURAN 1,2,3,4,7,8 -HEXACHLORODIBENZO-E-DIOXIN 1,2,3,4,7,8 -HEXACHLORODIBENZOFURAN 1,2,3,6,7,8 -HEXACHLORODIBENZO-E-DIOXIN 1,2,3,6,7,8 -HEXACHLORODIBENZOFURAN 1,2,3,7,8,9 -HEXACHLORODIBENZO-E-DIOXIN 1,2,3,7,8,9 -HEXACHLORODIBENZOFURAN 1,2,3,7,8 -EENTACHLORODIBENZO-E-DIOXIN 1 , 2 , 3 , 7 , 8 -EENTACHLORODIBENZOFURAN 2,3,4,6,7,8 -HEXACHLORODIBENZOFURAN 2 , 3 , 4 , 7 , 8 -EENTACHLORODIBENZOFURAN 2,3,7,8 -TETRACHLORODIBENZO-E-DIOXIN 2,3,7,8 -TETRACHLORODIBENZOFURAN OCTACHLORODIBENZO-E-DIOXIN OCTACHLORODIBENZOFURAN UNIT TO/KG TO/KG TO/KG TO/KG TO/KG TO/KG TO/KG TO/KG TO/KG TO/KG TO/KG TO/KG TO/KG TO/KG TO/KG TO/KG TO/KG SAMPLE SIZE 94 94 94 94 94 94 94 94 94 94 94 94 94 94 94 94 94 EOTWs 6857 6857 6857 6857 6857 6857 6857 6857 6857 6857 6857 6857 6857 6857 6857 6857 6857 EERCENT DETECT 100 99 100 99 96 100 100 100 20 100 93 100 100 99 100 100 100 MEAN 492.00 167.00 9.13 3.61 5.53 21.30 5.21 11.80 0.84 5.76 1.51 6.03 2.61 1.42 3.11 6780.00 802.00 STANDARD DEVIATION 2060.00 551.00 58.30 6.87 20.70 35.00 25.20 19.80 2.51 5.69 7.28 38.70 17.70 1.50 3.93 39100.00 3890.00 OBSERVED MAXIMUM 24100.00 5150.00 655.00 124.00 500.00 369.00 618.00 332.00 54.40 92.00 189.00 974.00 463.00 47.20 79.70 457000.00 37800.00 99TH EERCENTILE 1520.00 3410.00 54.90 16.20 36.60 131.00 24.10 52.80 4.12 14.60 6.71 31.10 7.61 5.09 10.60 14300.00 19000.00 98TH EERCENTILE 1030.00 351.00 19.20 9.80 15.30 66.00 13.90 35.70 2.73 13.10 4.05 12.60 7.26 4.86 10.50 12800.00 1910.00 95TH EERCENTILE 743.00 231.00 8.73 8.02 10.10 43.90 8.37 22.80 1.72 12.00 3.04 8.19 5.91 3.37 7.87 7790.00 753.00 90TH EERCENTILE 656.00 170.00 6.94 6.46 8.73 41.30 8.07 21.20 1.10 11.10 2.61 7.81 3.97 2.38 5.70 7510.00 554.00 MEDIAN 273.00 88.20 2.80 2.22 3.36 15.10 2.60 7.49 0.50 4.57 1.00 2.80 1.50 1.10 2.30 2730.00 279.00 A-10 ------- EXHIBIT 2 : NATIONAL POLLUTANT CONCENTRATION PERCENTILE ESTIMATES FROM THE 2001 NATIONAL SEWAGE SLUDGE SURVEY Nonparametrie Substitution Method Estimation Procedure -Nondetects Set to H ML group=PCBs POLLUTANT DECACHLORO BIEHENYL PCB-1 PCB-10 PCB-103 PCB-104 PCB-105 PCB-106 PCB-107+PCB-124 PCB-109 PCB-11 PCB-110+PCB-115 PCB-111 PCB-112 PCB-114 PCB-118 PCB-12+PCB-13 PCB-120 PCB-121 PCB-122 PCB-123 PCB-126 PCB-127 PCB-128+PCB-166 PCB-129+PCB-138+PCB-160+PCB-163 PCB-130 PCB-131 UNIT TO/KG TO/KG TO/KG TO/KG TO/KG TO/KG TO/KG TO/KG TO/KG TO/KG TO/KG TO/KG TO/KG TO/KG TO/KG TO/KG TO/KG TO/KG TO/KG TO/KG TO/KG TO/KG TO/KG TO/KG TO/KG TO/KG SAMPLE SIZE 94 94 94 94 94 94 94 94 94 94 94 94 94 94 94 94 94 94 94 94 94 94 94 94 94 94 POTWs 6857 6857 6857 6857 6857 6857 6857 6857 6857 6857 6857 6857 6857 6857 6857 6857 6857 6857 6857 6857 6857 6857 6857 6857 6857 6857 PERCENT DETECT 100 95 85 98 9 100 0 100 100 97 100 2 0 100 100 100 65 25 99 100 49 80 100 100 100 100 MEAN 862.00 101.00 21.60 60.10 31.50 4570.00 3.28 411.00 687.00 11400.00 12900.00 3.78 7.20 292.00 9870.00 149.00 13.40 7.73 141.00 313.00 73.30 22.40 1780.00 11900.00 694.00 168.00 STANDARD DEVIATION 2260.00 521.00 53.20 159.00 46.60 7120.00 4.94 532.00 888.00 337000.00 17400.00 6.50 10.40 453.00 12200.00 220.00 29.50 12.70 256.00 386.00 117.00 23.60 2100.00 13800.00 763.00 182.00 OBSERVED MAXIMUM 12800.00 12700.00 722.00 3160.00 474.00 39200.00 24.50 2810.00 4700.00 17500000.00 93600.00 106.00 49.00 2500.00 63600.00 5000.00 575.00 166.00 1430.00 2140.00 503.00 241.00 10100.00 93800.00 4170.00 825.00 99TH PERCENTILE 10000.00 1150.00 225.00 308.00 236.00 33800.00 23.20 2540.00 4310.00 6910.00 81600.00 24.40 46.30 2180.00 58200.00 1070.00 64.20 47.70 1210.00 1830.00 467.00 95.90 9430.00 63500.00 3530.00 821.00 98TH PERCENTILE 7290.00 376.00 84.80 293.00 228.00 28300.00 21.80 2270.00 3920.00 6180.00 69700.00 24.30 43.70 1870.00 52800.00 589.00 63.60 45.00 984.00 1520.00 441.00 95.70 8770.00 62700.00 3410.00 817.00 95TH PERCENTILE 1490.00 208.00 56.70 167.00 84.90 10800.00 18.20 1040.00 1720.00 3860.00 29000.00 20.00 40.00 677.00 24700.00 452.00 48.70 40.00 298.00 674.00 400.00 65.40 5460.00 34200.00 1880.00 502.00 90TH PERCENTILE 927.00 174.00 40.60 101.00 41.50 8210.00 3.87 750.00 1270.00 3410.00 23800.00 8.29 15.20 536.00 19500.00 293.00 31.90 20.30 236.00 534.00 164.00 46.50 3630.00 30500.00 1520.00 357.00 MEDIAN 384.00 34.20 11.60 27.50 25.00 2270.00 2.50 223.00 388.00 1060.00 7330.00 2.50 5.00 154.00 5550.00 81.90 5.01 5.00 62.90 258.00 46.90 14.20 994.00 7000.00 399.00 101.00 A-ll ------- EXHIBIT 2 : NATIONAL POLLUTANT CONCENTRATION PERCENTILE ESTIMATES FROM THE 2001 NATIONAL SEWAGE SLUDGE SURVEY Nonparametrie Substitution Method Estimation Procedure -Nondetects Set to H ML group=PCBs (continued) Pollutant Unit Sample Size Percent Detect Standard Deviation Observed Maximum 99th Percentile 98th Percentile 95th Percentile 90th Percentile Median 94 4+PCB-143 PCB PCB PCB PCB PCB-139+PCB-140 PCB-14 PCB-141 PCB-142 PCB-144 PCB-145 PCB-146 PCB-147+PCB-149 PCB-148 PCB-15 PCB-150 PCB-152 PCB-153+PCB-168 PCB-155 PCB-156+PCB-157 PCB-158 PCB-159 PCB-16 PCB-161 94 5+PCB-151+PCB-154 94 94 94 94 94 94 94 94 94 94 94 A-12 ------- EXHIBIT 2 : NATIONAL POLLUTANT CONCENTRATION PERCENTILE ESTIMATES FROM THE 2001 NATIONAL SEWAGE SLUDGE SURVEY Nonparametrie Substitution Method Estimation Procedure -Nondetects Set to ^2. ML group=PCBs (continued) Pollutant Sample Size Percent Detect Standard Deviation Observed Maximum 99th Percentile 98th Percentile 95th Percentile 90th Percentile PCB- PCB- PCB-165 PCB-167 PCB-169 PCB-17 PCB-170 PCB-171+PCB-173 PCB-172 PCB- PCB- PCB-176 PCB-177 PCB-178 PCB-179 PCB-18+PCB-30 PCB-180+PCB-193 PCB-181 PCB-182 PCB-183+PCB-185 PCB-184 PCB-186 PCB-187 PCB-188 PCB-189 'CB-174 'CB-175 A-13 ------- EXHIBIT 2 : NATIONAL POLLUTANT CONCENTRATION PERCENTILE ESTIMATES FROM THE 2001 NATIONAL SEWAGE SLUDGE SURVEY Nonparametrie Substitution Method Estimation Procedure -Nondetects Set to H ML group=PCBs (continued) Pollutant Unit Sample Size Percent Detect Standard Deviation Observed Maximum 99th Percentile 98th Percentile 95th Percentile 90th Percentile Median 99 99 93 A-14 ------- EXHIBIT 2 : NATIONAL POLLUTANT CONCENTRATION PERCENTILE ESTIMATES FROM THE 2001 NATIONAL SEWAGE SLUDGE SURVEY Nonparametrie Substitution Method Estimation Procedure -Nondetects Set to H ML group=PCBs (continued) POLLUTANT PCB-26+PCB-29 PCB-27 PCB-3 PCB-31 PCB-32 PCB-34 PCB-35 PCB-36 PCB-37 PCB-38 PCB-39 PCB-4 PCB-40+PCB-41+PCB-71 PCB-42 PCB-43 PCB-44+PCB-47+PCB-65 PCB-45+PCB-51 PCB-46 PCB-48 PCB-4 9+PCB-69 PCB-5 PCB-50+PCB-53 PCB-52 PCB-54 PCB-55 UNIT flG/KG 3G/KG 3G/KG 3G/KG TO/KG TO/KG TO/KG TO/KG TO/KG flG/KG 3G/KG 3G/KG 3G/KG TO/KG TO/KG TO/KG TO/KG flG/KG flG/KG 3G/KG 3G/KG TO/KG TO/KG TO/KG TO/KG SAMPLE SIZE 94 94 94 94 94 94 94 94 94 94 94 94 94 94 94 94 94 94 94 94 94 94 94 94 94 POTWs 6857 6857 6857 6857 6857 6857 6857 6857 6857 6857 6857 6857 6857 6857 6857 6857 6857 6857 6857 6857 6857 6857 6857 6857 6857 PERCENT DETECT 100 100 99 100 100 74 100 100 100 36 99 96 100 100 96 100 100 100 100 100 66 100 100 91 77 MEAN 641.00 202.00 119.00 3840.00 882.00 15.90 242.00 66.00 1430.00 6.47 30.80 447.00 3560.00 1870.00 224.00 7180.00 998.00 349.00 1060.00 4270.00 21.80 786.00 9640.00 15.40 52.90 STANDARD DEVIATION 1010.00 304.00 227.00 5720.00 1420.00 23.40 1200.00 52.00 2430.00 13.30 48.60 1230.00 7690.00 4210.00 391.00 14300.00 1760.00 641.00 1870.00 8670.00 48.60 1480.00 15700.00 71.20 66.30 OBSERVED MAXIMUM 8170.00 2140.00 3670.00 46100.00 10400.00 196.00 44500.00 523.00 12200.00 124.00 255.00 13700.00 41400.00 22700.00 1860.00 76300.00 9960.00 3180.00 9110.00 46200.00 492.00 7240.00 81200.00 2980.00 387.00 99TH PERCENTILE 3770.00 1630.00 643.00 17900.00 4710.00 95.40 727.00 176.00 11500.00 57.30 234.00 5030.00 35200.00 19200.00 1850.00 65100.00 8290.00 3140.00 9010.00 39500.00 216.00 7010.00 71900.00 86.90 232.00 98TH PERCENTILE 3060.00 915.00 616.00 16100.00 4640.00 90.70 532.00 173.00 10800.00 48.60 230.00 2300.00 29100.00 15600.00 1830.00 53900.00 8280.00 3090.00 8910.00 32800.00 75.20 6770.00 62600.00 83.50 225.00 95TH PERCENTILE 2210.00 902.00 502.00 13400.00 3880.00 49.20 434.00 155.00 4900.00 24.50 103.00 1530.00 12500.00 7100.00 1080.00 26300.00 3870.00 1440.00 3920.00 15900.00 69.40 3720.00 33700.00 62.60 195.00 90TH PERCENTILE 1670.00 564.00 383.00 12800.00 2530.00 37.20 396.00 144.00 3520.00 11.20 53.80 1020.00 6640.00 2960.00 419.00 11200.00 2420.00 782.00 2540.00 6110.00 47.90 1320.00 16200.00 27.30 136.00 MEDIAN 303.00 117.00 30.80 1900.00 458.00 6.69 179.00 49.80 699.00 2.50 15.50 149.00 1390.00 680.00 92.60 2890.00 391.00 143.00 450.00 1780.00 5.00 304.00 4750.00 4.56 29.70 A-15 ------- EXHIBIT 2 : NATIONAL POLLUTANT CONCENTRATION PERCENTILE ESTIMATES FROM THE 2001 NATIONAL SEWAGE SLUDGE SURVEY Nonparametrie Substitution Method Estimation Procedure -Nondetects Set to H ML group=PCBs (continued) POLLUTANT PCB-56 PCB-57 PCB-58 PCB-59+PCB-62+PCB-75 PCB-6 PCB-60 PCB-61+PCB-70+PCB-74+PCB-76 PCB-63 PCB-64 PCB-66 PCB-67 PCB-68 PCB-7 PCB-72 PCB-73 PCB-77 PCB-78 PCB-79 PCB-8 PCB-80 PCB-81 PCB-82 PCB-83+PCB-99 PCB-84 PCB-85+PCB-116+PCB-117 UNIT UG/KG UG/KG UG/KG UG/KG UG/KG UG/KG UG/KG UG/KG UG/KG UG/KG UG/KG UG/KG UG/KG UG/KG UG/KG UG/KG UG/KG UG/KG UG/KG UG/KG UG/KG UG/KG UG/KG UG/KG UG/KG SAMPLE SIZE 94 94 94 94 94 94 94 94 94 94 94 94 94 94 94 94 94 94 94 94 94 94 94 94 94 POTWs 6857 6857 6857 6857 6857 6857 6857 6857 6857 6857 6857 6857 6857 6857 6857 6857 6857 6857 6857 6857 6857 6857 6857 6857 6857 PERCENT DETECT 100 71 45 100 92 100 100 100 99 100 100 100 97 86 4 100 32 100 93 18 100 100 100 100 100 MEAN 3440.00 20.70 14.20 548.00 182.00 1720.00 12700.00 268.00 3280.00 7610.00 146.00 50.90 59.30 37.00 6.55 824.00 8.77 131.00 697.00 7.27 199.00 1420.00 6270.00 2920.00 2020.00 STANDARD DEVIATION 9470.00 31.90 25.60 1100.00 473.00 4310.00 23800.00 549.00 6890.00 20400.00 241.00 404.00 359.00 70.80 14.20 2480.00 11.10 183.00 2260.00 10.70 354.00 2310.00 8630.00 3610.00 3120.00 OBSERVED MAXIMUM 52800.00 175.00 128.00 5860.00 4910.00 24000.00 129000.00 2960.00 37400.00 113000.00 1220.00 10600.00 9120.00 363.00 371.00 23200.00 120.00 981.00 24600.00 63.10 1980.00 12800.00 46500.00 18900.00 17100.00 99TH PERCENTILE 41900.00 140.00 108.00 5100.00 1970.00 19400.00 111000.00 2530.00 31400.00 89500.00 1160.00 164.00 441.00 357.00 47.30 10700.00 47.10 880.00 8750.00 48.70 1620.00 10800.00 41700.00 16800.00 14500.00 98TH PERCENTILE 30900.00 134.00 88.20 4340.00 689.00 14800.00 93800.00 2090.00 25500.00 65900.00 1100.00 159.00 113.00 351.00 44.60 7790.00 44.40 778.00 2660.00 48.30 1260.00 8820.00 36900.00 14600.00 12000.00 95TH PERCENTILE 9330.00 92.80 55.20 2160.00 644.00 4600.00 41700.00 1060.00 12100.00 25300.00 526.00 108.00 161.00 157.00 18.70 1910.00 40.00 322.00 1960.00 40.00 399.00 3220.00 13800.00 7440.00 4480.00 90TH PERCENTILE 4640.00 46.30 43.00 945.00 371.00 2820.00 19100.00 397.00 5020.00 8620.00 316.00 71.70 87.00 54.40 6.88 828.00 15.40 243.00 1630.00 8.18 375.00 2590.00 11500.00 5280.00 3490.00 MEDIAN 1170.00 8.21 5.00 223.00 54.20 577.00 5580.00 110.00 1350.00 2390.00 64.50 25.80 19.50 10.60 5.00 228.00 5.00 69.50 185.00 5.00 100.00 722.00 3370.00 1700.00 1020.00 A-16 ------- EXHIBIT 2 : NATIONAL POLLUTANT CONCENTRATION PERCENTILE ESTIMATES FROM THE 2001 NATIONAL SEWAGE SLUDGE SURVEY Nonparametrie Substitution Method Estimation Procedure -Nondetects Set to H ML group=PCBs (continued) POLLUTANT ECB-86+ECB-87+ECB-97+ECB-108+ECB-119+ECB-125 ECB-88+ECB-91 ECB-89 ECB-9 ECB-90+ECB-101+ECB-113 ECB-92 ECB-93+ECB-95+ECB-98+ECB-100+ECB-102 ECB-94 ECB-96 UNIT TO/KG flG/KG flG/KG 3G/KG 3G/KG TO/KG TO/KG TO/KG TO/KG SAMPLE SIZE 94 94 94 94 94 94 94 94 94 EOTWs 6857 6857 6857 6857 6857 6857 6857 6857 6857 EERCENT DETECT 100 100 99 96 100 100 100 93 99 MEAN 8200.00 1440.00 131.00 60.10 11300.00 1980.00 8940.00 53.90 72.10 STANDARD DEVIATION 11200.00 1960.00 259.00 156.00 14100.00 2270.00 10700.00 90.60 107.00 OBSERVED MAXIMUM 60300.00 10500.00 1450.00 1600.00 71600.00 13700.00 53600.00 1370.00 643.00 99TH EERCENTILE 52500.00 9650.00 1220.00 594.00 69300.00 10300.00 52900.00 381.00 544.00 98TH EERCENTILE 44800.00 8800.00 982.00 275.00 67000.00 9330.00 52200.00 359.00 520.00 95TH EERCENTILE 19500.00 3350.00 303.00 255.00 27900.00 4930.00 21800.00 131.00 167.00 90TH EERCENTILE 15300.00 2870.00 202.00 105.00 25700.00 4450.00 18900.00 87.20 133.00 MEDIAN 4580.00 774.00 64.10 17.20 6590.00 1230.00 5290.00 29.80 39.60 A-17 ------- EXHIBIT 2 : NATIONAL POLLUTANT CONCENTRATION PERCENTILE ESTIMATES FROM THE 2001 NATIONAL SEWAGE SLUDGE SURVEY Nonparametrie Substitution Method Estimation Procedure -Nondetects Set to H ML group=TOTALS POLLUTANT PCBA PCBB TOTAL DICHLORO BIPHENYLS TOTAL HEPTACHLORO BIPHENYLS TOTAL HEXACHLORO BIPHENYLS TOTAL MONOCHLORO BIPHENYLS TOTAL NONACHLORO BIPHENYLS TOTAL OCTACHLORO BIPHENYLS TOTAL PCBS TOTAL PENTACHLORO BIPHENYLS TOTAL TETRACHLORO BIPHENYLS TOTAL TRICHLORO BIPHENYLS DIOXINSA DIOXINSB UNIT UG/KG UG/KG UG/KG UG/KG UG/KG UG/KG UG/KG UG/KG UG/KG UG/KG UG/KG UG/KG UG/KG UG/KG SAMPLE SIZE 94 94 94 94 94 94 94 94 94 94 94 94 94 94 POTWs 6857 6857 6857 6857 6857 6857 6857 6857 6857 6857 6857 6857 6857 6857 PERCENT DETECT 0 100 100 100 100 100 100 100 100 100 100 100 0 100 MEAN 249000.00 249000.00 14200.00 20000.00 50700.00 275.00 1590.00 6040.00 249000.00 74100.00 61000.00 19800.00 8320.00 8320.00 STANDARD DEVIATION 478000.00 478000.00 338000.00 28000.00 58000.00 1190.00 2190.00 7340.00 478000.00 97100.00 125000.00 30400.00 45000.00 45000.00 OBSERVED MAXIMUM 18400000.00 18400000.00 17500000.00 376000.00 516000.00 32500.00 11800.00 92900.00 18400000.00 516000.00 681000.00 244000.00 525000.00 525000.00 99TH PERCENTILE 1660000.00 1660000.00 61500.00 108000.00 243000.00 2010.00 10900.00 28900.00 1660000.00 457000.00 576000.00 100000.00 37200.00 37200.00 98TH PERCENTILE 1630000.00 1630000.00 26500.00 102000.00 217000.00 938.00 9910.00 28000.00 1630000.00 399000.00 472000.00 84800.00 15300.00 15300.00 95TH PERCENTILE 520000.00 520000.00 12400.00 69400.00 153000.00 903.00 4330.00 18200.00 520000.00 174000.00 213000.00 76900.00 9110.00 9110.00 90TH PERCENTILE 500000.00 500000.00 7040.00 35000.00 122000.00 672.00 2720.00 15000.00 498000.00 146000.00 92300.00 61100.00 8890.00 8890.00 MEDIAN 132000.00 132000.00 2860.00 13000.00 30500.00 81.70 888.00 3820.00 131000.00 42100.00 24800.00 9530.00 3350.00 3350.00 A-18 ------- EXHIBIT 3 : NATIONAL POLLUTANT CONCENTRATION PERCENTILE ESTIMATES FROM THE 2001 NATIONAL SEWAGE SLUDGE SURVEY Nonparametrie Substitution Method Estimation Procedure -Nondetects Set to ML group=Dioxins and Furans POLLUTANT 1,2,3,4,6,7 , 8-HEETACHLORODIBENZO-E-DIOXIN 1,2,3,4,6,7, 8 -HEETACHLORODIBENZOFURAN 1,2,3,4,7,8, 9-HEETACHLORODIBENZOFURAN 1,2,3,4,7, 8 -HEXACHLORODIBENZO-E-DIOXIN 1,2,3,4,7, 8 -HEXACHLORODIBENZOFURAN 1,2,3,6,7 , 8 -HEXACHLORODIBENZO-E-DIOXIN 1,2,3,6,7 , 8 -HEXACHLORODIBENZOFURAN 1,2,3,7,8, 9-HEXACHLORODIBENZO-E-DIOXIN 1,2,3,7,8, 9-HEXACHLORODIBENZOFURAN 1,2,3,7 , 8-EENTACHLORODIBENZO-E-DIOXIN 1,2,3,7, 8 -EENTACHLORODIBENZOFURAN 2,3,4,6,7 , 8 -HEXACHLORODIBENZOFURAN 2,3,4,7, 8 -EENTACHLORODIBENZOFURAN 2,3,7 , 8-TETRACHLORODIBENZO-E-DIOXIN 2,3,7 , 8-TETRACHLORODIBENZOFURAN OCTACHLORODIBENZO-E-DIOXIN OCTACHLORODIBENZOFURAN UNIT flG/KG flG/KG flG/KG flG/KG flG/KG flG/KG flG/KG flG/KG flG/KG flG/KG flG/KG flG/KG flG/KG flG/KG flG/KG flG/KG flG/KG SAMPLE SIZE 94 94 94 94 94 94 94 94 94 94 94 94 94 94 94 94 94 EOTWs 6857 6857 6857 6857 6857 6857 6857 6857 6857 6857 6857 6857 6857 6857 6857 6857 6857 EERCENT DETECT 100 99 100 99 96 100 100 100 20 100 93 100 100 99 100 100 100 MEAN 492.00 167.00 9.13 3.62 5.56 21.30 5.21 11.80 1.41 5.76 1.66 6.03 2.61 1.42 3.11 6780.00 802.00 STANDARD DEVIATION 2060.00 551.00 58.30 6.87 20.70 35.00 25.20 19.80 2.66 5.69 7.32 38.70 17.70 1.50 3.93 39100.00 3890.00 OBSERVED MAXIMUM 24100.00 5150.00 655.00 124.00 500.00 369.00 618.00 332.00 54.40 92.00 189.00 974.00 463.00 47.20 79.70 457000.00 37800.00 99TH EERCENTILE 1520.00 3410.00 54.90 16.20 36.60 131.00 24.10 52.80 6.43 14.60 6.71 31.10 7.61 5.09 10.60 14300.00 19000.00 98TH EERCENTILE 1030.00 351.00 19.20 9.80 15.30 66.00 13.90 35.70 5.46 13.10 6.08 12.60 7.26 4.86 10.50 12800.00 1910.00 95TH EERCENTILE 743.00 231.00 8.73 8.02 10.10 43.90 8.37 22.80 3.44 12.00 4.15 8.19 5.91 3.37 7.87 7790.00 753.00 90TH EERCENTILE 656.00 170.00 6.94 6.46 8.73 41.30 8.07 21.20 1.76 11.10 2.63 7.81 3.97 2.38 5.70 7510.00 554.00 MEDIAN 273.00 88.20 2.80 2.22 3.36 15.10 2.60 7.49 1.00 4.57 1.00 2.80 1.50 1.10 2.30 2730.00 279.00 A-19 ------- EXHIBIT 3 : NATIONAL POLLUTANT CONCENTRATION PERCENTILE ESTIMATES FROM THE 2001 NATIONAL SEWAGE SLUDGE SURVEY Nonparametrie Substitution Method Estimation Procedure -Nondetects Set to ML group=PCBs POLLUTANT DECACHLORO BIPHENYI, PCB-1 PCB-10 PCB-103 PCB-104 PCB-105 PCB-106 PCB-107+PCB-124 PCB-109 PCB-11 PCB-110+PCB-115 PCB-111 PCB-112 PCB-114 PCB-118 PCB-12+PCB-13 PCB-120 PCB-121 PCB-122 PCB-123 PCB-126 PCB-127 PCB-128+PCB-166 PCB-129+PCB-138+PCB-160+PCB-163 PCB-130 PCB-131 UNIT flG/KG flG/KG flG/KG flG/KG flG/KG flG/KG flG/KG flG/KG flG/KG flG/KG flG/KG flG/KG flG/KG flG/KG flG/KG flG/KG flG/KG flG/KG flG/KG flG/KG flG/KG flG/KG flG/KG flG/KG flG/KG flG/KG SAMPLE SIZE 94 94 94 94 94 94 94 94 94 94 94 94 94 94 94 94 94 94 94 94 94 94 94 94 94 94 POTWs 6857 6857 6857 6857 6857 6857 6857 6857 6857 6857 6857 6857 6857 6857 6857 6857 6857 6857 6857 6857 6857 6857 6857 6857 6857 6857 PERCENT DETECT 100 95 85 98 9 100 0 100 100 97 100 2 0 100 100 100 65 25 99 100 49 80 100 100 100 100 MEAN 862.00 102.00 23.70 60.10 60.10 4570.00 6.56 411.00 687.00 11400.00 12900.00 7.33 14.40 292.00 9870.00 151.00 17.80 13.60 141.00 313.00 120.00 23.90 1780.00 11900.00 694.00 168.00 STANDARD DEVIATION 2260.00 521.00 54.70 159.00 90.60 7120.00 9.88 532.00 888.00 337000.00 17400.00 11.00 20.70 453.00 12200.00 273.00 33.80 21.50 256.00 386.00 209.00 23.60 2100.00 13800.00 763.00 182.00 OBSERVED MAXIMUM 12800.00 12700.00 722.00 3160.00 490.00 39200.00 49.00 2810.00 4700.00 17500000.00 93600.00 106.00 98.00 2500.00 63600.00 10000.00 575.00 166.00 1430.00 2140.00 980.00 241.00 10100.00 93800.00 4170.00 825.00 99TH PERCENTILE 10000.00 1150.00 225.00 308.00 485.00 33800.00 46.30 2540.00 4310.00 6910.00 81600.00 46.70 92.70 2180.00 58200.00 1070.00 95.60 94.40 1210.00 1830.00 927.00 95.90 9430.00 63500.00 3530.00 821.00 98TH PERCENTILE 7290.00 376.00 97.60 293.00 481.00 28300.00 43.70 2270.00 3920.00 6180.00 69700.00 44.10 87.30 1870.00 52800.00 589.00 92.20 89.10 984.00 1520.00 873.00 95.70 8770.00 62700.00 3410.00 817.00 95TH PERCENTILE 1490.00 208.00 87.70 167.00 179.00 10800.00 36.40 1040.00 1720.00 3860.00 29000.00 40.00 80.00 677.00 24700.00 452.00 80.00 80.00 298.00 674.00 744.00 72.10 5460.00 34200.00 1880.00 502.00 90TH PERCENTILE 927.00 174.00 42.20 101.00 62.40 8210.00 7.74 750.00 1270.00 3410.00 23800.00 16.60 30.40 536.00 19500.00 293.00 44.90 35.40 236.00 534.00 314.00 54.50 3630.00 30500.00 1520.00 357.00 MEDIAN 384.00 34.30 11.60 27.50 50.00 2270.00 5.00 223.00 388.00 1060.00 7330.00 5.00 10.00 154.00 5550.00 81.90 9.76 10.00 62.90 258.00 58.80 14.50 994.00 7000.00 399.00 101.00 A-20 ------- EXHIBIT 3 : NATIONAL POLLUTANT CONCENTRATION PERCENTILE ESTIMATES FROM THE 2001 NATIONAL SEWAGE SLUDGE SURVEY Nonparametrie Substitution Method Estimation Procedure -Nondetects Set to ML group=PCBs (continued) EOLLUTANT PCB-132 PCB-133 PCB-134+ECB-143 PCB-135+ECB-151+ECB-154 PCB-136 PCB-137 PCB-139+ECB-140 PCB-14 PCB-141 PCB-142 PCB-144 PCB-145 PCB-146 PCB-147+ECB-149 PCB-148 PCB-15 PCB-150 PCB-152 PCB-153+ECB-168 PCB-155 PCB-156+ECB-157 PCB-158 PCB-159 PCB-16 PCB-161 UNIT UG/KG UG/KG UG/KG UG/KG UG/KG UG/KG UG/KG UG/KG UG/KG UG/KG UG/KG UG/KG UG/KG UG/KG UG/KG UG/KG UG/KG UG/KG UG/KG UG/KG UG/KG UG/KG UG/KG UG/KG UG/KG SAMPLE SIZE 94 94 94 94 94 94 94 94 94 94 94 94 94 94 94 94 94 94 94 94 94 94 94 94 94 EOTWs 6857 6857 6857 6857 6857 6857 6857 6857 6857 6857 6857 6857 6857 6857 6857 6857 6857 6857 6857 6857 6857 6857 6857 6857 6857 EERCENT DETECT 100 100 100 100 100 100 100 84 100 0 100 75 100 100 89 100 98 89 100 95 100 100 95 100 0 MEAN 3670.00 145.00 594.00 3590.00 1380.00 584.00 199.00 16.10 2010.00 12.60 512.00 11.50 1440.00 8400.00 16.50 1130.00 13.70 12.90 9540.00 26.90 1540.00 1150.00 103.00 941.00 12.70 STANDARD DEVIATION 4020.00 169.00 660.00 4430.00 1620.00 583.00 211.00 41.30 2420.00 18.90 572.00 20.40 1610.00 9950.00 37.80 1460.00 25.30 18.10 11100.00 83.10 1690.00 1280.00 143.00 1750.00 19.00 OBSERVED MAXIMUM 31700.00 2570.00 4850.00 56200.00 19500.00 2610.00 1650.00 883.00 22200.00 98.00 4320.00 98.00 20300.00 107000.00 823.00 12800.00 591.00 310.00 109000.00 2010.00 8200.00 7760.00 1540.00 17200.00 98.00 99TH EERCENTILE 17600.00 613.00 2940.00 15900.00 6020.00 2550.00 898.00 104.00 10500.00 92.70 2300.00 92.70 6140.00 39100.00 94.60 5460.00 42.80 52.40 45700.00 184.00 7750.00 5770.00 600.00 6590.00 92.70 98TH EERCENTILE 17400.00 563.00 2890.00 15400.00 5710.00 2500.00 880.00 94.90 9160.00 87.30 2140.00 87.30 5640.00 35700.00 89.30 3740.00 42.70 52.10 41300.00 58.20 7460.00 5250.00 559.00 3910.00 87.30 95TH EERCENTILE 10100.00 419.00 1550.00 13900.00 4770.00 1780.00 583.00 80.20 5110.00 39.70 1840.00 41.70 4430.00 29100.00 65.30 3570.00 40.10 47.90 31900.00 51.30 4620.00 3060.00 341.00 2880.00 42.60 90TH EERCENTILE 9330.00 325.00 1470.00 7090.00 3120.00 1290.00 404.00 38.20 4720.00 14.60 1170.00 20.50 3350.00 18100.00 33.30 2880.00 30.10 27.70 20200.00 40.40 3200.00 2570.00 166.00 1710.00 15.20 MEDIAN 2150.00 91.60 354.00 2280.00 811.00 382.00 117.00 6.23 1310.00 10.00 310.00 5.20 904.00 5270.00 7.39 769.00 8.37 6.28 5840.00 20.40 917.00 664.00 62.90 456.00 10.00 A-21 ------- EXHIBIT 3 : NATIONAL POLLUTANT CONCENTRATION PERCENTILE ESTIMATES FROM THE 2001 NATIONAL SEWAGE SLUDGE SURVEY Nonparametrie Substitution Method Estimation Procedure -Nondetects Set to ML group=PCBs (continued) POLLUTANT ECB-162 ECB-164 ECB-165 ECB-167 ECB-169 ECB-17 ECB-170 ECB-171+ECB-173 ECB-172 ECB-174 ECB-175 ECB-176 ECB-177 ECB-178 ECB-179 ECB-18+ECB-30 ECB-180+ECB-193 ECB-181 ECB-182 ECB-183+ECB-185 ECB-184 ECB-186 ECB-187 ECB-188 ECB-189 UNIT UG/KG UG/KG UG/KG UG/KG UG/KG UG/KG UG/KG UG/KG UG/KG UG/KG UG/KG UG/KG UG/KG UG/KG UG/KG UG/KG UG/KG UG/KG UG/KG UG/KG UG/KG UG/KG UG/KG UG/KG UG/KG SAMPLE SIZE 94 94 94 94 94 94 94 94 94 94 94 94 94 94 94 94 94 94 94 94 94 94 94 94 94 EOTWs 6857 6857 6857 6857 6857 6857 6857 6857 6857 6857 6857 6857 6857 6857 6857 6857 6857 6857 6857 6857 6857 6857 6857 6857 6857 PERCENT DETECT 100 100 4 100 44 100 100 100 100 100 99 100 100 99 100 100 100 90 78 94 100 1 100 7 99 MEAN 32.20 754.00 6.29 455.00 4.91 1040.00 2090.00 677.00 372.00 2350.00 101.00 338.00 1340.00 539.00 1170.00 2040.00 5330.00 22.70 15.20 1690.00 64.30 12.60 3290.00 58.10 76.90 STANDARD DEVIATION 33.90 925.00 9.46 506.00 18.30 1820.00 3080.00 988.00 543.00 3330.00 135.00 482.00 2010.00 745.00 1590.00 3760.00 7970.00 25.80 23.20 2350.00 166.00 18.90 4240.00 90.60 117.00 OBSERVED MAXIMUM 217.00 6690.00 49.00 2740.00 466.00 16700.00 36100.00 12700.00 7240.00 42800.00 1890.00 7000.00 27100.00 11000.00 22400.00 36100.00 109000.00 195.00 317.00 31100.00 3960.00 98.00 55800.00 490.00 1440.00 99TH PERCENTILE 151.00 4310.00 46.30 2390.00 20.70 7270.00 13100.00 3780.00 2180.00 13100.00 474.00 1640.00 7290.00 2530.00 5490.00 14900.00 32400.00 113.00 97.90 8280.00 189.00 92.70 14900.00 463.00 502.00 98TH PERCENTILE 146.00 4250.00 43.70 2380.00 15.20 3870.00 11900.00 3450.00 2010.00 12200.00 449.00 1610.00 6860.00 2510.00 5390.00 8140.00 31100.00 112.00 97.90 7880.00 147.00 87.30 14800.00 437.00 455.00 95TH PERCENTILE 104.00 2240.00 20.10 1340.00 10.30 3850.00 6050.00 2490.00 1180.00 8310.00 402.00 1480.00 6040.00 2310.00 4930.00 6730.00 14300.00 70.10 65.80 7090.00 145.00 39.70 13900.00 153.00 212.00 90TH PERCENTILE 59.80 1780.00 8.20 960.00 8.34 2770.00 4250.00 1330.00 667.00 4110.00 186.00 575.00 2260.00 874.00 1890.00 4170.00 9330.00 57.10 32.50 3010.00 113.00 14.30 5560.00 57.10 167.00 MEDIAN 19.80 428.00 5.00 266.00 3.52 470.00 1230.00 407.00 228.00 1470.00 71.70 225.00 799.00 354.00 737.00 913.00 3160.00 13.30 8.86 1070.00 48.50 10.00 2190.00 50.00 43.10 A-22 ------- EXHIBIT 3 : NATIONAL POLLUTANT CONCENTRATION PERCENTILE ESTIMATES FROM THE 2001 NATIONAL SEWAGE SLUDGE SURVEY Nonparametrie Substitution Method Estimation Procedure -Nondetects Set to ML group=PCBs (continued) EOLLUTANT ECB-19 ECB-190 ECB-191 ECB-192 ECB-194 ECB-195 ECB-196 ECB-197+ECB-200 ECB-198+ECB-199 ECB-2 ECB-20+ECB-28 ECB-2 01 ECB-202 ECB-2 03 ECB-204 ECB-205 ECB-2 06 ECB-2 07 ECB-2 08 ECB-2 09 ECB-21+ECB-33 ECB-2 2 ECB-2 3 ECB-2 4 ECB-2 5 UNIT UG/KG UG/KG UG/KG UG/KG UG/KG UG/KG UG/KG UG/KG UG/KG UG/KG UG/KG UG/KG UG/KG UG/KG UG/KG UG/KG UG/KG UG/KG UG/KG UG/KG UG/KG UG/KG UG/KG UG/KG UG/KG SAMPLE SIZE 94 94 94 94 94 94 94 94 94 94 94 94 94 94 94 94 94 94 94 94 94 94 94 94 94 EOTWs 6857 6857 6857 6857 6857 6857 6857 6857 6857 6857 6857 6857 6857 6857 6857 6857 6857 6857 6857 6857 6857 6857 6857 6857 6857 EERCENT DETECT 100 100 100 1 100 99 100 100 100 97 100 99 100 100 25 99 100 100 100 100 100 100 50 93 100 MEAN 307.00 451.00 84.80 6.35 1110.00 422.00 649.00 262.00 1770.00 55.90 5300.00 228.00 490.00 1070.00 10.90 57.60 1050.00 127.00 412.00 862.00 999.00 1520.00 13.80 34.20 299.00 STANDARD DEVIATION 581.00 675.00 123.00 9.59 1560.00 650.00 874.00 302.00 2030.00 610.00 8320.00 253.00 455.00 1220.00 18.50 91.70 1440.00 141.00 620.00 2260.00 2230.00 2350.00 37.50 197.00 462.00 OBSERVED MAXIMUM 14800.00 7980.00 1630.00 49.60 19700.00 8240.00 12600.00 4220.00 24400.00 27100.00 48500.00 3430.00 4570.00 14400.00 98.00 1310.00 7690.00 943.00 3450.00 12800.00 22700.00 17800.00 844.00 10000.00 2930.00 99TH EERCENTILE 3210.00 2720.00 494.00 46.70 6570.00 2660.00 3320.00 1090.00 7930.00 169.00 32600.00 811.00 1590.00 4560.00 92.70 366.00 7220.00 653.00 2980.00 10000.00 9080.00 8640.00 93.60 233.00 1890.00 98TH EERCENTILE 646.00 2490.00 461.00 44.10 6320.00 2540.00 3210.00 1090.00 7730.00 142.00 30300.00 807.00 1570.00 4440.00 87.30 342.00 6750.00 614.00 2510.00 7290.00 3350.00 8390.00 88.30 40.20 1880.00 95TH EERCENTILE 1170.00 1630.00 265.00 20.90 3220.00 1470.00 1850.00 832.00 5090.00 102.00 24600.00 800.00 1520.00 3500.00 33.20 188.00 3000.00 356.00 985.00 1490.00 2540.00 4830.00 46.40 80.90 896.00 90TH EERCENTILE 917.00 803.00 161.00 7.60 2490.00 793.00 1500.00 572.00 4970.00 78.50 14700.00 536.00 1300.00 2880.00 13.20 110.00 1850.00 274.00 663.00 927.00 2330.00 4040.00 29.00 59.10 836.00 MEDIAN 143.00 258.00 50.90 5.00 645.00 213.00 392.00 187.00 1130.00 15.40 2640.00 156.00 380.00 687.00 6.68 30.90 583.00 83.20 233.00 384.00 384.00 719.00 6.00 17.50 126.00 A-23 ------- EXHIBIT 3 : NATIONAL POLLUTANT CONCENTRATION PERCENTILE ESTIMATES FROM THE 2001 NATIONAL SEWAGE SLUDGE SURVEY Nonparametrie Substitution Method Estimation Procedure -Nondetects Set to ML group=PCBs (continued) POLLUTANT PCB-26+PCB-29 PCB-27 PCB-3 PCB-31 PCB-32 PCB-34 PCB-35 PCB-36 PCB-37 PCB-38 PCB-39 PCB-4 PCB-40+PCB-41+PCB-71 PCB-42 PCB-43 PCB-44+PCB-47+PCB-65 PCB-45+PCB-51 PCB-46 PCB-48 PCB-4 9+PCB-69 PCB-5 PCB-50+PCB-53 PCB-52 PCB-54 PCB-55 UNIT flG/KG TO/KG TO/KG TO/KG TO/KG TO/KG TO/KG TO/KG TO/KG TO/KG TO/KG TO/KG TO/KG TO/KG TO/KG TO/KG TO/KG TO/KG TO/KG TO/KG TO/KG TO/KG TO/KG TO/KG TO/KG SAMPLE SIZE 94 94 94 94 94 94 94 94 94 94 94 94 94 94 94 94 94 94 94 94 94 94 94 94 94 POTWs 6857 6857 6857 6857 6857 6857 6857 6857 6857 6857 6857 6857 6857 6857 6857 6857 6857 6857 6857 6857 6857 6857 6857 6857 6857 PERCENT DETECT 100 100 99 100 100 74 100 100 100 36 99 96 100 100 96 100 100 100 100 100 66 100 100 91 77 MEAN 641.00 202.00 119.00 3840.00 882.00 19.40 242.00 66.00 1430.00 9.02 31.50 448.00 3560.00 1870.00 224.00 7180.00 998.00 349.00 1060.00 4270.00 25.60 786.00 9640.00 16.50 54.90 STANDARD DEVIATION 1010.00 304.00 227.00 5720.00 1420.00 27.70 1200.00 52.00 2430.00 15.20 48.70 1230.00 7690.00 4210.00 391.00 14300.00 1760.00 641.00 1870.00 8670.00 50.90 1480.00 15700.00 71.50 65.50 OBSERVED MAXIMUM 8170.00 2140.00 3670.00 46100.00 10400.00 196.00 44500.00 523.00 12200.00 124.00 255.00 13700.00 41400.00 22700.00 1860.00 76300.00 9960.00 3180.00 9110.00 46200.00 492.00 7240.00 81200.00 2980.00 387.00 99TH PERCENTILE 3770.00 1630.00 643.00 17900.00 4710.00 98.00 727.00 176.00 11500.00 60.50 234.00 5030.00 35200.00 19200.00 1850.00 65100.00 8290.00 3140.00 9010.00 39500.00 216.00 7010.00 71900.00 86.90 232.00 98TH PERCENTILE 3060.00 915.00 616.00 16100.00 4640.00 97.30 532.00 173.00 10800.00 56.20 230.00 2300.00 29100.00 15600.00 1830.00 53900.00 8280.00 3090.00 8910.00 32800.00 147.00 6770.00 62600.00 83.50 225.00 95TH PERCENTILE 2210.00 902.00 502.00 13400.00 3880.00 92.50 434.00 155.00 4900.00 45.40 103.00 1530.00 12500.00 7100.00 1080.00 26300.00 3870.00 1440.00 3920.00 15900.00 86.30 3720.00 33700.00 62.60 195.00 90TH PERCENTILE 1670.00 564.00 383.00 12800.00 2530.00 42.90 396.00 144.00 3520.00 22.50 53.80 1020.00 6640.00 2960.00 419.00 11200.00 2420.00 782.00 2540.00 6110.00 64.60 1320.00 16200.00 46.80 136.00 MEDIAN 303.00 117.00 30.80 1900.00 458.00 10.00 179.00 49.80 699.00 5.00 15.50 149.00 1390.00 680.00 92.60 2890.00 391.00 143.00 450.00 1780.00 10.00 304.00 4750.00 4.60 29.80 A-24 ------- EXHIBIT 3 : NATIONAL POLLUTANT CONCENTRATION PERCENTILE ESTIMATES FROM THE 2001 NATIONAL SEWAGE SLUDGE SURVEY Nonparametrie Substitution Method Estimation Procedure -Nondetects Set to ML group=PCBs (continued) Pollutant Unit Sample Size Percent Detect Standard Deviation Observed Maximum 99th Percentile 98th Percentile 95th Percentile 90th Percentile Median PCB- PCB- NG/KG PCB-58 PCB-59+PCB-62+PCB-75 PCB-6 PCB-60 PCB-61+PCB-70+PCB-74+PCB-76 PCB-63 PCB-64 PCB-66 PCB-67 PCB-68 PCB-7 PCB- PCB- PCB- PCB- PCB- PCB- PCB- PCB- PCB- PCB-83+PCB-99 PCB-84 PCB-85+PCB-116+PCB-117 NG/KG 94 94 94 94 >CB-72 94 94 94 94 NG/KG B-82 94 94 94 94 A-25 ------- EXHIBIT 3 : NATIONAL POLLUTANT CONCENTRATION PERCENTILE ESTIMATES FROM THE 2001 NATIONAL SEWAGE SLUDGE SURVEY Nonparametrie Substitution Method Estimation Procedure -Nondetects Set to ML group=PCBs (continued) Pollutant Sample Size Percent Detect Standard Deviation Observed Maximum 99th Percentile 98th Percentile 95th Percentile 90th Percentile PCB-86+PCB-87+PCB-97+PCB-108+PCB-119+PCB-125 PCB-90+PCB-101+PCB-113 A-26 ------- EXHIBIT 3 : NATIONAL POLLUTANT CONCENTRATION PERCENTILE ESTIMATES FROM THE 2001 NATIONAL SEWAGE SLUDGE SURVEY Nonparametrie Substitution Method Estimation Procedure -Nondetects Set to ML group=TOTALS Pollutant Sample Size Percent Detect Standard Deviation Observed Maximum 99th Percentile 98th Percentile 95th Percentile 90th Percentile 94 PCBb 94 TOTAL DICHLORO BIPHENYLS TOTAL HEPTACHLORO BIPHENYLS TOTAL HEXACHLORO BIPHENYLS TOTAL MONOCHLORO BIPHENYLS TOTAL NONACHLORO BIPHENYLS TOTAL OCTACHLORO BIPHENYLS 94 TOTAL PCBS 94 TOTAL PENTACHLORO BIPHENYLS 94 TOTAL TETRACHLORO BIPHENYLS 94 TOTAL TRICHLORO BIPHENYLS A-27 ------- APPENDIX B: NATIONAL Toxic EQUIVALENT ESTIMATES FROM THE 2001 NATIONAL SEWAGE SLUDGE SURVEY Exhibit 4—Nondetects Set to Zero Dioxin and Furans B-l PCBs B-2 Totals B-3 Exhibit 5—Nondetects Set to One-half ML Dioxin and Furans B-4 PCBs B-5 Totals B-6 Exhibit 6—Nondetects set to ML Dioxin and Furans B-7 PCBs B-8 Totals B-9 ------- EXHIBIT 4 : NATIONAL TOXIC EQUIVALENT ESTIMATES FROM THE 2001 NATIONAL SEWAGE SLUDGE SURVEY Nonparametrie Substitution Method Estimation Procedure - Nondetects Set to zero Dioxins and Furan TEQs POLLUTANT 1,2,3,4,6,7 , 8-HEETACHLORODIBENZO-E-DIOXIN 1,2,3,4,6,7, 8 -HEETACHLORODIBENZOFURAN 1,2,3,4,7,8, 9-HEETACHLORODIBENZOFURAN 1,2,3,4,7, 8 -HEXACHLORODIBENZO-E-DIOXIN 1,2,3,4,7, 8 -HEXACHLORODIBENZOFURAN 1,2,3,6,7 , 8 -HEXACHLORODIBENZO-E-DIOXIN 1,2,3,6,7 , 8 -HEXACHLORODIBENZOFURAN 1,2,3,7,8, 9-HEXACHLORODIBENZO-E-DIOXIN 1,2,3,7,8, 9-HEXACHLORODIBENZOFURAN 1,2,3,7 , 8-EENTACHLORODIBENZO-E-DIOXIN 1,2,3,7, 8 -EENTACHLORODIBENZOFURAN 2,3,4,6,7 , 8 -HEXACHLORODIBENZOFURAN 2,3,4,7, 8 -EENTACHLORODIBENZOFURAN 2,3,7 , 8-TETRACHLORODIBENZO-E-DIOXIN 2,3,7 , 8-TETRACHLORODIBENZOFURAN OCTACHLORODIBENZO-E-DIOXIN OCTACHLORODIBENZOFURAN UNIT UG/KG UG/KG UG/KG UG/KG UG/KG UG/KG UG/KG UG/KG UG/KG UG/KG UG/KG UG/KG UG/KG UG/KG UG/KG UG/KG UG/KG SAMPLE SIZE 94 94 94 94 94 94 94 94 94 94 94 94 94 94 94 94 94 EOTWs 6857 6857 6857 6857 6857 6857 6857 6857 6857 6857 6857 6857 6857 6857 6857 6857 6857 PERCENT DETECT 100 99 100 99 96 100 100 100 20 100 93 100 100 99 100 100 100 HEAN 4.92 1.67 0.09 0.36 0.55 2.13 0.52 1.18 0.03 5.76 0.07 0.60 1.31 1.41 0.31 0.68 0.08 STANDARD DEVIATION 20.60 5.51 0.58 0.69 2.07 3.50 2.52 1.98 0.25 5.69 0.36 3.87 8.86 1.50 0.39 3.91 0.39 OBSERVED MAXIMUM 241.00 51.50 6.55 12.40 50.00 36.90 61.80 33.20 5.44 92.00 9.45 97.40 232.00 47.20 7.97 45.70 3.78 99TH PERCENTILE 15.20 34.10 0.55 1.62 3.66 13.10 2.41 5.28 0.26 14.60 0.34 3.11 3.81 5.09 1.06 1.43 1.90 98TH EERCENTILE 10.30 3.51 0.19 0.98 1.53 6.60 1.39 3.57 0.06 13.10 0.20 1.26 3.63 4.86 1.05 1.28 0.19 95TH PERCENTILE 7.43 2.31 0.09 0.80 1.01 4.39 0.84 2.28 0.06 12.00 0.13 0.82 2.96 3.37 0.79 0.78 0.08 90TH PERCENTILE 6.56 1.70 0.07 0.65 0.87 4.13 0.81 2.12 0.02 11.10 0.12 0.78 1.98 2.38 0.57 0.75 0.06 MEDIAN 2.73 0.88 0.03 0.22 0.34 1.51 0.26 0.75 0.00 4.57 0.05 0.28 0.75 1.10 0.23 0.27 0.03 Note : Three significant figures are reported TEQs calculated with WHO-98 toxic eguivalent factors B-l ------- EXHIBIT 4: NATIONAL TOXIC EQUIVALENT ESTIMATES FROM THE 2001 NATIONAL SEWAGE SLUDGE SURVEY Nonparametrie Substitution Method Estimation Procedure - Nondetects Set to zero Dioxin-Like PCB TEQs POLLUTANT PCB-105 PCB-114 PCB-118 PCB-123 PCB-126 PCB-156+PCB-157 PCB-167 PCB-169 PCB-189 PCB-77 PCB-81 UNIT flG/KG TO/KG TO/KG TO/KG TO/KG TO/KG TO/KG TO/KG TO/KG TO/KG TO/KG SAMPLE SIZE 94 94 94 94 94 94 94 94 94 94 94 POTWs 6857 6857 6857 6857 6857 6857 6857 6857 6857 6857 6857 PERCENT DETECT 100 100 100 100 49 100 100 44 99 100 100 tfEAN 0.46 0.15 0.99 0.03 2.69 0.77 0.00 0.02 0.01 0.08 0.02 STANDARD DEVIATION 0.71 0.23 1.22 0.04 7.21 0.85 0.01 0.18 0.01 0.25 0.04 OBSERVED MAXIMUM 3.92 1.25 6.36 0.21 50.30 4.10 0.03 4.66 0.14 2.32 0.20 99TH PERCENTILE 3.38 1.09 5.82 0.18 34.90 3.88 0.02 0.13 0.05 1.07 0.16 98TH PERCENTILE 2.83 0.93 5.28 0.15 3.57 3.73 0.02 0.11 0.05 0.78 0.13 95TH PERCENTILE 1.08 0.34 2.47 0.07 6.82 2.31 0.01 0.06 0.02 0.19 0.04 90TH PERCENTILE 0.82 0.27 1.95 0.05 4.82 1.60 0.01 0.05 0.02 0.08 0.04 MEDIAN 0.23 0.08 0.56 0.03 0.00 0.46 0.00 0.00 0.00 0.02 0.01 Note: Three significant figures are reported using WHO set of TEFs B-2 ------- EXHIBIT 4 : NATIONAL TOXIC EQUIVALENT ESTIMATES FROM THE 2001 NATIONAL SEWAGE SLUDGE SURVEY Nonparametrie Substitution Method Estimation Procedure - Nondetects Set to zero Totals POLLUTANT PCBA PCBB 3IOXINSA 3IOXINSB TOTAL DIOXINS/FURANS/PCBS UNIT UG/KG UG/KG UG/KG UG/KG UG/KG SAMPLE SIZE 94 94 94 94 94 POTWs 6857 6857 6857 6857 6857 PERCENT DETECT 0 100 0 100 0 HEAN 5.22 5.22 21.70 21.70 26.90 STANDARD DEVIATION 10.30 10.30 47.50 47.50 49.50 OBSERVED MAXIMUM 58.30 58.30 682.00 682.00 718.00 99TH PERCENTILE 50.60 50.60 100.00 100.00 113.00 98TH PERCENTILE 44.80 44.80 54.40 54.40 76.60 95TH PERCENTILE 13.10 13.10 33.30 33.30 59.30 90TH PERCENTILE 9.66 9.66 31.40 31.40 42.90 MEDIAN 2.05 2.05 15.50 15.50 19.70 a Composites considered a detect if all individual congeners or PCBs are measured above the minimum level. b Composites considered a detect if at least one congener is measured above the minimum level. Note: Three significant figures are reported using WHO set of TEFs B-3 ------- EXHIBIT 5 : NATIONAL TOXIC EQUIVALENT ESTIMATES FROM THE 2001 NATIONAL SEWAGE SLUDGE SURVEY Nonparametric Substitution Method Estimation Procedure - Nondetects Set to H Minimum Level (H ML) Dioxins and Furan TEQs EOLLUTANT 1,2,3,4,6,7 , 8-HEETACHLORODIBENZO-E-DIOXIN 1,2,3,4,6,7, 8 -HEETACHLORODIBENZOFURAN 1,2,3,4,7,8, 9-HEETACHLORODIBENZOFURAN 1,2,3,4,7, 8 -HEXACHLORODIBENZO-E-DIOXIN 1,2,3,4,7, 8 -HEXACHLORODIBENZOFURAN 1,2,3,6,7 , 8 -HEXACHLORODIBENZO-E-DIOXIN 1,2,3,6,7 , 8 -HEXACHLORODIBENZOFURAN 1,2,3,7,8, 9-HEXACHLORODIBENZO-E-DIOXIN 1,2,3,7,8, 9-HEXACHLORODIBENZOFURAN 1,2,3,7 , 8-EENTACHLORODIBENZO-E-DIOXIN 1,2,3,7, 8 -EENTACHLORODIBENZOFURAN 2,3,4,6,7 , 8 -HEXACHLORODIBENZOFURAN 2,3,4,7, 8 -EENTACHLORODIBENZOFURAN 2,3,7 , 8-TETRACHLORODIBENZO-E-DIOXIN 2,3,7 , 8-TETRACHLORODIBENZOFURAN OCTACHLORODIBENZO-E-DIOXIN OCTACHLORODIBENZOFURAN UNIT NG/KG NG/KG NG/KG NG/KG NG/KG NG/KG NG/KG NG/KG NG/KG NG/KG NG/KG NG/KG NG/KG NG/KG NG/KG NG/KG NG/KG SAMPLE SIZE 94 94 94 94 94 94 94 94 94 94 94 94 94 94 94 94 94 EOTWs 6857 6857 6857 6857 6857 6857 6857 6857 6857 6857 6857 6857 6857 6857 6857 6857 6857 EERCENT DETECT 100 99 100 99 96 100 100 100 20 100 93 100 100 99 100 100 100 MEAN 4.92 1.67 0.09 0.36 0.55 2.13 0.52 1.18 0.08 5.76 0.08 0.60 1.31 1.42 0.31 0.68 0.08 STANDARD DEVIATION 20.60 5.51 0.58 0.69 2.07 3.50 2.52 1.98 0.25 5.69 0.36 3.87 8.86 1.50 0.39 3.91 0.39 OBSERVED MAXIMUM 241.00 51.50 6.55 12.40 50.00 36.90 61.80 33.20 5.44 92.00 9.45 97.40 232.00 47.20 7.97 45.70 3.78 99TH EERCENTILE 15.20 34.10 0.55 1.62 3.66 13.10 2.41 5.28 0.41 14.60 0.34 3.11 3.81 5.09 1.06 1.43 1.90 98TH EERCENTILE 10.30 3.51 3.57 0.98 1.53 6.60 1.39 3.57 0.27 13.10 0.20 1.26 3.63 4.86 1.05 1.28 3.57 95TH EERCENTILE 7.43 2.31 0.09 0.80 1.01 4.39 0.84 2.28 0.17 12.00 0.15 0.82 2.96 3.37 0.79 0.78 0.08 90TH EERCENTILE 6.56 1.70 0.07 0.65 0.87 4.13 0.81 2.12 0.11 11.10 0.13 0.78 1.98 2.38 0.57 0.75 0.06 MEDIAN 2.73 0.88 0.03 0.22 0.34 1.51 0.26 0.75 0.05 4.57 0.05 0.28 0.75 1.10 0.23 0.27 0.03 Note : Three significant figures are reported TEQs calculated with WHO-98 toxic eguivalent factors B-4 ------- EXHIBIT 5 : NATIONAL TOXIC EQUIVALENT ESTIMATES FROM THE 2001 NATIONAL SEWAGE SLUDGE SURVEY Nonparametric Substitution Method Estimation Procedure - Nondetects Set to H Minimum Level (H ML) Dioxin-Like PCB TEQs EOLLUTANT ECB-105 ECB-114 ECB-118 ECB-123 ECB-126 ECB-156+ECB-157 ECB-167 ECB-169 ECB-189 ECB-77 ECB-81 UNIT NG/KG NG/KG NG/KG NG/KG NG/KG NG/KG NG/KG NG/KG NG/KG NG/KG NG/KG SAMPLE SIZE 94 94 94 94 94 94 94 94 94 94 94 EOTWs 6857 6857 6857 6857 6857 6857 6857 6857 6857 6857 6857 PERCENT DETECT 100 100 100 100 49 100 100 44 99 100 100 rtEAN 0.46 0.15 0.99 0.03 7.33 0.77 0.00 0.04 0.01 0.08 0.02 STANDARD DEVIATION 0.71 0.23 1.22 0.04 11.70 0.85 0.01 0.18 0.01 0.25 0.04 OBSERVED MAXIMUM 3.92 1.25 6.36 0.21 50.30 4.10 0.03 4.66 0.14 2.32 0.20 99TH EERCENTILE 3.38 1.09 5.82 0.18 46.70 3.88 0.02 0.13 0.05 1.07 0.16 98TH EERCENTILE 2.83 0.93 5.28 0.15 44.10 3.73 0.02 0.11 0.05 0.78 0.13 95TH EERCENTILE 1.08 0.34 2.47 0.07 40.00 2.31 0.01 0.09 0.02 0.19 0.04 90TH EERCENTILE 0.82 0.27 1.95 0.05 16.40 1.60 0.01 0.06 0.02 0.08 0.04 MEDIAN 0.23 0.08 0.56 0.03 4.69 0.46 0.00 0.03 0.00 0.02 0.01 Note: Three significant figures are reported using WHO set of TEFs B-5 ------- EXHIBIT 5 : NATIONAL TOXIC EQUIVALENT ESTIMATES FROM THE 2001 NATIONAL SEWAGE SLUDGE SURVEY Nonparametric Substitution Method Estimation Procedure - Nondetects Set to H Minimum Level (H ML) Totals POLLUTANT PCBA PCBB DIOXINSA DIOXINSB TOTAL 3IOXINS/FURANS/PCBS UNIT UG/KG UG/KG UG/KG UG/KG UG/KG SAMPLE SIZE 94 94 94 94 94 POTWs 6857 6857 6857 6857 6857 PERCENT DETECT 0 100 0 100 0 HEAN 9.87 9.87 21.70 21.70 31.60 STANDARD DEVIATION 14.00 14.00 47.50 47.50 50.00 OBSERVED MAXIMUM 58.30 58.30 682.00 682.00 718.00 99TH PERCENTILE 55.10 55.10 100.00 100.00 115.00 98TH PERCENTILE 54.50 54.50 54.40 13.10 80.00 95TH PERCENTILE 49.40 49.40 33.30 12.00 73.50 90TH PERCENTILE 19.20 19.20 31.60 31.60 55.20 MEDIAN 6.04 6.04 15.50 15.50 23.40 a Composites considered a detect if all individual congeners or PCBs are measured above the minimum level. b Composites considered a detect if at least one congener is measured above the minimum level. Note: Three significant figures are reported using WHO set of TEFs B-6 ------- EXHIBIT 6 : NATIONAL TOXIC EQUIVALENT ESTIMATES FROM THE 2001 NATIONAL SEWAGE SLUDGE SURVEY Nonparametric Substitution Method Estimation Procedure - Nondetects Set to Minimum Level (ML) Dioxins and Furan TEQs POLLUTANT 1,2,3,4,6,7 , 8-HEETACHLORODIBENZO-E-DIOXIN 1,2,3,4,6,7, 8 -HEETACHLORODIBENZOFURAN 1,2,3,4,7,8, 9-HEETACHLORODIBENZOFURAN 1,2,3,4,7, 8 -HEXACHLORODIBENZO-E-DIOXIN 1,2,3,4,7, 8 -HEXACHLORODIBENZOFURAN 1,2,3,6,7 , 8 -HEXACHLORODIBENZO-E-DIOXIN 1,2,3,6,7 , 8 -HEXACHLORODIBENZOFURAN 1,2,3,7,8, 9-HEXACHLORODIBENZO-E-DIOXIN 1,2,3,7,8, 9-HEXACHLORODIBENZOFURAN 1,2,3,7 , 8-EENTACHLORODIBENZO-E-DIOXIN 1,2,3,7, 8 -EENTACHLORODIBENZOFURAN 2,3,4,6,7 , 8 -HEXACHLORODIBENZOFURAN 2,3,4,7, 8 -EENTACHLORODIBENZOFURAN 2,3,7 , 8-TETRACHLORODIBENZO-E-DIOXIN 2,3,7 , 8-TETRACHLORODIBENZOFURAN OCTACHLORODIBENZO-E-DIOXIN OCTACHLORODIBENZOFURAN UNIT UG/KG UG/KG UG/KG UG/KG UG/KG UG/KG UG/KG UG/KG UG/KG UG/KG UG/KG UG/KG UG/KG UG/KG UG/KG UG/KG UG/KG SAMPLE SIZE 94 94 94 94 94 94 94 94 94 94 94 94 94 94 94 94 94 EOTWs 6857 6857 6857 6857 6857 6857 6857 6857 6857 6857 6857 6857 6857 6857 6857 6857 6857 EERCENT DETECT 100 99 100 99 96 100 100 100 20 100 93 100 100 99 100 100 100 MEAN 4.92 1.67 0.09 0.36 0.56 2.13 0.52 1.18 0.14 5.76 0.08 0.60 1.31 1.42 0.31 0.68 0.08 STANDARD DEVIATION 20.60 5.51 0.58 0.69 2.07 3.50 2.52 1.98 0.27 5.69 0.37 3.87 8.86 1.50 0.39 3.91 0.39 OBSERVED MAXIMUM 241.00 51.50 6.55 12.40 50.00 36.90 61.80 33.20 5.44 92.00 9.45 97.40 232.00 47.20 7.97 45.70 3.78 99TH EERCENTILE 15.20 34.10 0.55 1.62 3.66 13.10 2.41 5.28 0.64 14.60 0.34 3.11 3.81 5.09 1.06 1.43 1.90 98TH EERCENTILE 10.30 3.51 0.19 0.98 1.53 6.60 1.39 3.57 0.55 13.10 0.30 3.57 3.63 4.86 1.05 1.28 0.19 95TH EERCENTILE 7.43 2.31 0.09 0.80 1.01 4.39 0.84 2.28 0.34 12.00 0.21 0.82 2.96 3.37 0.79 0.78 0.08 90TH EERCENTILE 5.56 1.70 0.07 0.65 0.87 4.13 0.81 2.12 0.18 11.10 0.13 0.78 1.98 2.38 0.57 0.75 0.06 MEDIAN 2.73 0.88 0.03 0.22 0.34 1.51 0.26 0.75 0.10 4.57 0.05 0.28 0.75 1.10 0.23 0.27 0.03 Note: Three significant figures are reported using WHO set of TEFs B-7 ------- EXHIBIT 6 : NATIONAL TOXIC EQUIVALENT ESTIMATES FROM THE 2001 NATIONAL SEWAGE SLUDGE SURVEY Nonparametric Substitution Method Estimation Procedure - Nondetects Set to Minimum Level (ML) Dioxin-Like PCB TEQs POLLUTANT PCB-105 PCB-114 PCB-118 PCB-123 PCB-126 PCB-156+PCB-157 PCB-167 PCB-169 PCB-189 PCB-77 PCB-81 UNIT UG/KG UG/KG UG/KG UG/KG UG/KG UG/KG UG/KG UG/KG UG/KG UG/KG UG/KG SAMPLE SIZE 94 94 94 94 94 94 94 94 94 94 94 POTWs 6857 6857 6857 6857 6857 6857 6857 6857 6857 6857 6857 PERCENT DETECT 100 100 100 100 49 100 100 44 99 100 100 HEAN 0.46 0.15 0.99 0.03 12.00 0.77 0.00 0.05 0.01 0.08 0.02 STANDARD DEVIATION 0.71 0.23 1.22 0.04 20.90 0.85 0.01 0.18 0.01 0.25 0.04 OBSERVED MAXIMUM 3.92 1.25 6.36 0.21 98.00 4.10 0.03 4.66 0.14 2.32 0.20 99TH PERCENTILE 3.38 1.09 5.82 0.18 92.70 3.88 0.02 0.21 0.05 1.07 0.16 98TH PERCENTILE 2.83 0.93 5.28 0.15 87.30 3.73 0.02 0.15 3.57 0.78 0.13 95TH PERCENTILE 1.08 0.34 2.47 0.07 74.40 2.31 0.01 0.10 0.02 0.19 0.04 90TH PERCENTILE 0.82 0.27 1.95 0.05 31.40 1.60 0.01 0.08 0.02 0.08 0.04 MEDIAN 0.23 0.08 0.56 0.03 5.88 0.46 0.00 0.04 0.00 0.02 0.01 Note: Three significant figures are reported using WHO set of TEFs B-8 ------- EXHIBIT 6 : NATIONAL TOXIC EQUIVALENT ESTIMATES FROM THE 2001 NATIONAL SEWAGE SLUDGE SURVEY Nonparametric Substitution Method Estimation Procedure - Nondetects Set to Minimum Level (ML) Totals POLLUTANT PCBA PCBB 3IOXINSA 3IOXINSB TOTAL DIOXINS/FURANS/PCBS UNIT UG/KG UG/KG UG/KG UG/KG UG/KG SAMPLE SIZE 94 94 94 94 94 POTWs 6857 6857 6857 6857 6857 PERCENT DETECT 0 100 0 100 0 tfEAN 14.50 14.50 21.80 21.80 36.30 STANDARD DEVIATION 22.40 22.40 47.50 47.50 52.60 OBSERVED MAXIMUM 103.00 103.00 682.00 682.00 718.00 99TH PERCENTILE 97.20 97.20 100.00 100.00 138.00 98TH PERCENTILE 91.60 91.60 54.40 54.40 117.00 95TH PERCENTILE 78.00 78.00 33.30 33.30 113.00 90TH PERCENTILE 35.00 35.00 31.70 31.70 69.10 MEDIAN 8.11 8.11 15.50 15.50 24.00 a Composites considered a detect if all individual congeners or PCBs are measured above the minimum level. b Composites considered a detect if at least one congener is measured above the minimum level. Note: Three significant figures are reported using WHO set of TEFs B-9 ------- APPENDIX C: EMPIRICAL CUMULATIVE DISTRIBUTIONS OF NATIONAL Toxic EQUIVALENTS FROM THE 2001 NATIONAL SEWAGE SLUDGE SURVEY Exhibit 1—Dioxin and Furan TEQs Nondetects Set to Zero C-l Nondetects Set to ML C-4 Nondetects Set to One-half ML C-7 Exhibit 2—Coplanar PCB TEQs Nondetects Set to Zero C-10 Nondetects Set to ML C-13 Nondetects Set to One-half ML C-16 Exhibit 3—Total Dioxin/Furan/Coplanar PCB TEQ Nondetects Set to Zero C-19 Nondetects Set to ML C-22 Nondetects Set to One-half ML C-25 ------- EPA / NSSS 15:55 19SEP01 M:\PW\SLUDGE\REQ165\R165AK10.SAS NATIONAL POLLUTANT CONCENTRATION PERCENTILE ESTIMATES FROM THE NATIONAL SEWAGE SLUDGE 2001 SURVEY - DIOXINS/FUBANS Nonparametric Substitution Method Estimation Procedure - Nondetects Set to zero Cumulative Distribution for Dioxins/Furans/PCBs EPISODE QTY LOW P b Composites considered a detect if at least one congener is measured above the minimum level. Using WHO set of TEFs C-l ------- EPA / NSSS 15:55 19SEP01 M:\PW\SLUDGE\REQ165\R165AK10.SAS NATIONAL POLLUTANT CONCENTRATION PERCENTILE ESTIMATES FROM THE NATIONAL SEWAGE SLUDGE 2001 SURVEY - DIOXINS/FUBANS Nonparametric Substitution Method Estimation Procedure - Nondetects Set to zero Cumulative Distribution for Dioxins/Furans/PCBs EPISODE QTY LOW P 23. 22. 22. 22. 20. 20. 20. 20. 19. 19. 19. 18. 18. 18. 17. 17. 17. 17. 16 . 15. 15. 15. 15. 15. 15. 14. 14. 14. 14. 14. 13. 13. 12. .046 .416 .321 .147 .863 .691 .451 .207 .961 . 652 .239 .894 .458 .205 .721 .187 .175 .123 .326 .502 .445 .380 .250 .180 .083 .985 .548 .425 .039 .018 .335 .304 .598 0.72630 0.69259 0.68515 0.67770 0.67624 0.64253 0.63508 0.62763 0 . 62019 0.61872 0.58501 0.58355 0.57611 0.56866 0.56720 0.55975 0.55230 0.51859 0.51115 0.50370 0.49625 0.49479 0.49333 0.45962 0.45217 0.44472 0.44326 0.44180 0.44033 0.40663 0.39918 0.39772 0.39625 C-2 ------- EPA / NSSS 15:55 19SEP01 M:\PW\SLUDGE\REQ165\R165AK10.SAS NATIONAL POLLUTANT CONCENTRATION PERCENTILE ESTIMATES FROM THE NATIONAL SEWAGE SLUDGE 2001 SURVEY - DIOXINS/FUBANS Nonparametric Substitution Method Estimation Procedure - Nondetects Set to zero Cumulative Distribution for Dioxins/Furans/PCBs EPISODE QTY LOW P 12. 10. 10. 10. 10. 10. 10. 9. 9 , 9 S. a. a. 8. 7 . 6. 6. 6. 6. 5. 5 . 5 . 4. 4. 4. 3. 2 . 2 . .487 .863 .684 .196 .167 .100 .074 .832 .399 .033 .929 .421 .339 .007 .515 .742 .302 .267 .093 .708 .429 .000 .449 .237 .060 .628 .713 .171 0.36254 0.35510 0.35474 0.32103 0.31957 0.28586 0.28439 0.28293 0.27548 0.27402 0.26657 0.25913 0.25168 0.24423 0.23679 0.22934 0.22190 0.18819 0.18074 0.14703 0.14667 0.11296 0.07925 0.04555 0.04408 0.04262 0.00891 0.00146 b Composites considered a detect if at least one congener is measured above the minimum level. Using WHO set of TEFs C-3 ------- EPA / NSSS 15:55 19SEP01 M:\PW\SLUDGE\REQ165\R165AK10.SAS NATIONAL POLLUTANT CONCENTRATION PERCENTILE ESTIMATES FROM THE NATIONAL SEWAGE SLUDGE 2001 SURVEY - DIOXINS/FUBANS Nonparametric Substitution Method Estimation Procedure - Nondetects Set to ML Cumulative Distribution for Dioxins/Furans/PCBs EPISODE detect if at least one congener is measured above the minimum level. Using WHO set of TEFs C-4 ------- EPA / NSSS 15:55 19SEP01 M:\PW\SLUDGE\REQ165\R165AK10.SAS NATIONAL POLLUTANT CONCENTRATION PERCENTILE ESTIMATES FROM THE NATIONAL SEWAGE SLUDGE 2001 SURVEY - DIOXINS/FUBANS Nonparametric Substitution Method Estimation Procedure - Nondetects Set to ML Cumulative Distribution for Dioxins/Furans/PCBs EPISODE 23 22 22 22 21 20 20 20 20 19 19 18 18 18 17 17 17 17 16 15 15 15 15 15 15 15 14. 14. 14. 14. 13 13 12 .046 .651 .416 .197 .291 .993 .551 .307 .061 .752 .339 .994 .558 .305 .821 .287 .275 .223 .326 .602 .445 .430 .280 .250 .208 .085 . 969 .598 .525 .118 .435 .304 .707 0.72630 0.69259 0.68515 0.67770 0.67624 0.66879 0.63508 0.62763 0.62019 0.61872 0.58501 0.58355 0.57611 0.56866 0.56720 0.55975 0.55230 0.51859 0.51115 0.50370 0.49625 0.49479 0.49333 0.48588 0.45217 0.44472 0.44326 0.40955 0.40809 0.40663 0.39918 0.39772 0.39625 detect if at least one congener is measured above the minimum level. Using WHO set of TEFs C-5 ------- EPA / NSSS 15:55 19SEP01 M:\PW\SLUDGE\REQ165\R165AK10.SAS NATIONAL POLLUTANT CONCENTRATION PERCENTILE ESTIMATES FROM THE NATIONAL SEWAGE SLUDGE 2001 SURVEY - DIOXINS/FUBANS Nonparametric Substitution Method Estimation Procedure - Nondetects Set to ML Cumulative Distribution for Dioxins/Furans/PCBs EPISODE C-6 ------- EPA / NSSS 15:55 19SEP01 M:\PW\SLUDGE\REQ165\R165AK10.SAS NATIONAL POLLUTANT CONCENTRATION PERCENTILE ESTIMATES FROM THE NATIONAL SEWAGE SLUDGE 2001 SURVEY - DIOXINS/FUBANS Nonparametric Substitution Method Estimation Procedure - Nondetects Set to ^ ML Cumulative Distribution for Dioxins/Furans/PCBs EPISODE QTYHALF P b Composites considered a detect if at least one congener is measured above the minimum level. Using WHO set of TEFs C-7 ------- EPA / NSSS 15:55 19SEP01 M:\PW\SLUDGE\REQ165\R165AK10.SAS NATIONAL POLLUTANT CONCENTRATION PERCENTILE ESTIMATES FROM THE NATIONAL SEWAGE SLUDGE 2001 SURVEY - DIOXINS/FUBANS Nonparametric Substitution Method Estimation Procedure - Nondetects Set to % ML Cumulative Distribution for Dioxins/Furans/PCBs EPISODE QTYHALF P 23. 22. 22. 22. 20. 20. 20. 20. 20. 19. 19. 18. 18. 18. 17. 17. 17. 17. 16 . 15. 15. 15. 15. 15. 15. 15. 14. 14. 14. 14. 13. 13. 12. .046 .486 .416 .172 .991 .928 .501 .257 .011 .702 .289 .944 .508 .255 .771 .237 .225 .173 .326 .552 .445 .405 .250 .230 .146 .035 .573 .504 .475 .068 .385 .304 .648 0.72630 0.69259 0.68515 0.67770 0.67624 0.66879 0.63508 0.62763 0 . 62019 0.61872 0.58501 0.58355 0.57611 0.56866 0.56720 0.55975 0.55230 0.51859 0.51115 0.50370 0.49625 0.49479 0.49333 0.45962 0.45217 0.44472 0.44326 0.44180 0.40809 0.40663 0.39918 0.39772 0.39625 b Composites considered a detect if at least one congener is measured above the minimum level. Using WHO set of TEFs C-8 ------- EPA / NSSS 15:55 19SEP01 M:\PW\SLUDGE\REQ165\R165AK10.SAS NATIONAL POLLUTANT CONCENTRATION PERCENTILE ESTIMATES FROM THE NATIONAL SEWAGE SLUDGE 2001 SURVEY - DIOXINS/FUBANS Nonparametric Substitution Method Estimation Procedure - Nondetects Set to ^ ML Cumulative Distribution for Dioxins/Furans/PCBs EPISODE QTYHALF P C-9 ------- EPA / NSSS 15:55 19SEP01 M:\PW\SLUDGE\REQ165\R165AK10.SAS NATIONAL POLLUTANT CONCENTRATION PERCENTILE ESTIMATES FROM THE NATIONAL SEWAGE SLUDGE 2001 SURVEY - PCBs Nonparametric Substitution Method Estimation Procedure - Nondetects Set to zero Cumulative Distribution for Dioxins/Furans/PCBs ANALYTE EPISODE QTY LOW 58 55 35 27 17 17 15 13 12. 12. 11 11 11 11 10 10 10 9 9 9 8 8 7 7 7 7 6 6 5 5 5 5 5 .2748 .5356 .9509 .3497 .9937 .1738 .3819 .1778 .7402 .1636 .9929 .6132 .4289 .0908 .8286 .7600 .2258 .4764 .4080 .2857 .4721 .2844 .8358 .5962 .5883 .4087 .6916 .2420 .6103 .5178 .4393 .4338 .4020 1.00000 0.99854 0.96483 0.96336 0.96190 0.96154 0.96118 0.95374 0.92003 0.91857 0.91710 0.91564 0.91528 0.91382 0.91346 0.90601 0.90566 0.89821 0.89675 0.89528 0.89492 0.88748 0.85377 0.85231 0.85084 0.84938 0.84902 0.81531 0.81385 0.81238 0.80494 0.79749 0.76378 detect if at least one congener is measured above the minimum level. Using WHO set of TEFs C-10 ------- EPA / NSSS 15:55 19SEP01 M:\PW\SLUDGE\REQ165\R165AK10.SAS NATIONAL POLLUTANT CONCENTRATION PERCENTILE ESTIMATES FROM THE NATIONAL SEWAGE SLUDGE 2001 SURVEY - PCBs Nonparametric Substitution Method Estimation Procedure - Nondetects Set to zero Cumulative Distribution for Dioxins/Furans/PCBs ANALYTE EPISODE QTY LOW 4. 3 3 3 3 3 3 3 3 2 2 2 2 2 2 2 2 2 2 1 1 1 1 1 1 1 1 .0763 .9998 .9313 .7741 .5951 .5212 .4290 .3979 .1042 .9963 .9424 .8151 .7198 .6203 .4876 .4690 .2176 .0846 .0547 .0465 .0184 .9198 .8972 .8074 .7598 .7252 .6298 .5647 .5436 0.68001 0.67256 0.66512 0.66365 0.65621 0.65585 0.65438 0.62067 0.61921 0.61177 0.60432 0.60286 0.59541 0.56170 0.55425 0.54681 0.53936 0.53790 0.50419 0.47048 0.46303 0.46267 0.45523 0.45376 0.42006 0.41970 0.41823 0.41079 0.37708 detect if at least one congener is measured above the minimum level. Using WHO set of TEFs C-ll ------- EPA / NSSS 15:55 19SEP01 M:\PW\SLUDGE\REQ165\R165AK10.SAS NATIONAL POLLUTANT CONCENTRATION PERCENTILE ESTIMATES FROM THE NATIONAL SEWAGE SLUDGE 2001 SURVEY - PCBs Nonparametric Substitution Method Estimation Procedure - Nondetects Set to zero Cumulative Distribution for Dioxins/Furans/PCBs ANALYTE EPISODE QTY LOW 1 1 1 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 .4653 .4571 .4513 .3857 .3756 .3094 .2799 .1356 .0939 .0041 .9365 .9144 .8375 .7866 .7716 .7508 . 6892 .6381 .4606 .4311 .3940 .2870 .2761 .2174 .2133 .0732 .0569 .0515 0.34337 0.33592 0.32848 0.29477 0.29330 0.28586 0.27841 0.27096 0.27061 0.23690 0.23543 0.22799 0.22652 0.19282 0.18537 0.17792 0.17048 0.16901 0.16755 0.16010 0.12639 0.09268 0.09122 0.08976 0.08231 0.04860 0.04116 0.00745 detect if at least one congener is measured above the minimum level. Using WHO set of TEFs C-12 ------- EPA / NSSS 15:55 19SEP01 M:\PW\SLUDGE\REQ165\R165AK10.SAS NATIONAL POLLUTANT CONCENTRATION PERCENTILE ESTIMATES FROM THE NATIONAL SEWAGE SLUDGE 2001 SURVEY - PCBs Nonparametric Substitution Method Estimation Procedure - Nondetects Set to ML Cumulative Distribution for Dioxins/Furans/PCBs ANALYTE EPISODE PCBb 6364 6385 6369 6359 6341 6358 6404 6345 6339 6407 6340 6352 6346 6415 6424 6355 6348 6373 6431 6416 6420 6413 6429 6405 6371 6366 6353 6367 6419 6425 6427 6437 b Composites considered a detect if at least one congener is measured above the minimum level. Using WHO set of TEFs .02. 84. 83. 82. 58. 55 . 42. 35. 34. 27. 23. 17. 17. 16. 15. 14. 13. 12. 12. 12. 12. 12. 12. 11. 11. 11. 11. 11. 11. 11. 11. 11. 11. .716 .000 .774 .568 .275 .536 .444 .951 .910 .375 .941 .994 .174 .733 .432 .036 .178 .996 .992 .740 .730 .164 .018 .993 .897 .760 .615 .613 .594 .515 .451 .429 .396 1.00000 0 . 96629 0.95884 0.95140 0.94395 0.94249 0.90878 0.90133 0.89987 0.89242 0.89096 0.88950 0.88914 0.88878 0.88133 0.87389 0.84018 0.80647 0.79902 0.79756 0.79610 0.76239 0.76092 0.76057 0.75910 0.75764 0.75728 0.72357 0.72321 0.68950 0.68206 0.64835 0 . 64689 C-13 ------- EPA / NSSS 15:55 19SEP01 M:\PW\SLUDGE\REQ165\R165AK10.SAS NATIONAL POLLUTANT CONCENTRATION PERCENTILE ESTIMATES FROM THE NATIONAL SEWAGE SLUDGE 2001 SURVEY - PCBs Nonparametric Substitution Method Estimation Procedure - Nondetects Set to ML Cumulative Distribution for Dioxins/Furans/PCBs ANALYTE EPISODE PCBb 6392 6409 6403 6350 6374 6401 6391 6344 6379 6349 6412 6399 6343 6411 6347 6418 6357 6370 6356 6426 6436 6438 6406 6361 6387 6375 6363 6338 6378 6390 6400 6342 6421 b Composites considered a detect if at least one congener is measured above the minimum level. Using WHO set of TEFs 11. 11. 11. 11. 11. 10. 10. 10. 10. 10. 10. 10. 10. 10. 9. 9. 9 . 8. 8. 8. 7 . 7 . 7 . 7 . 7. 6. 6. 6. 6. 5 . 5 . 5. 5. .376 .309 .144 .091 .054 .964 .888 .837 .829 .760 .739 .688 .267 .226 .476 .433 .336 .521 .472 .284 .886 .596 .588 .409 .110 .761 .702 .242 .062 .660 .518 .484 .439 0.64542 0.63798 0.63053 0.59682 0.59646 0.59500 0.59354 0.55983 0.55238 0.54493 0.54458 0.54311 0.54165 0.53420 0.52676 0.52529 0.52383 0.52347 0.52201 0.51456 0.48085 0.47939 0.47793 0.47646 0.47610 0.44239 0.43495 0.40124 0.39978 0.39233 0.39087 0.38342 0.34971 C-14 ------- EPA / NSSS 15:55 19SEP01 M:\PW\SLUDGE\REQ165\R165AK10.SAS NATIONAL POLLUTANT CONCENTRATION PERCENTILE ESTIMATES FROM THE NATIONAL SEWAGE SLUDGE 2001 SURVEY - PCBs Nonparametric Substitution Method Estimation Procedure - Nondetects Set to ML Cumulative Distribution for Dioxins/Furans/PCBs ANALYTE EPISODE PCBb 6377 6381 6396 6410 6372 6434 6393 6389 6397 6430 6360 6428 6386 6435 6351 6414 6365 6382 6376 6380 6433 6384 6383 6394 6354 6423 6402 6368 b Composites considered a detect if at least one congener is measured above the minimum level. Using WHO set of TEFs C-15 ------- EPA / NSSS 15:55 19SEP01 M:\PW\SLUDGE\REQ165\R165AK10.SAS NATIONAL POLLUTANT CONCENTRATION PERCENTILE ESTIMATES FROM THE NATIONAL SEWAGE SLUDGE 2001 SURVEY - PCBs Nonparametric Substitution Method Estimation Procedure - Nondetects Set to % ML Cumulative Distribution for Dioxins/Furans/PCBs ANALYTE EPISODE QTYHALF 58 55 53 43 43 42 35 27 21 18 17 17 15 13. 13. 12 12 11 11 11 11 10 10 10 9 9 9 9 9 8 8 7 7 .2748 .5356 .6673 .9998 .7741 .5276 .9509 .3622 .6900 .4780 .9937 .1738 .4069 . 9363 .1778 .7402 .1636 .9929 .6132 .4289 .0908 .8286 .7600 .2258 .7188 .4764 .4205 .3107 .0951 .4721 .2844 .9963 . 9674 1.00000 0.99854 0.96483 0.93112 0.92367 0.91623 0.90878 0.90732 0.90585 0.89841 0.89096 0.89060 0.89024 0.88280 0.88133 0.84762 0.84616 0.84470 0.84323 0.84288 0.84141 0.84105 0.83361 0.83325 0.82580 0.79209 0 . 79063 0.78917 0.78881 0.78136 0.77392 0.74021 0.73276 detect if at least one congener is measured above the minimum level. Using WHO set of TEFs C-16 ------- EPA / NSSS 15:55 19SEP01 M:\PW\SLUDGE\REQ165\R165AK10.SAS NATIONAL POLLUTANT CONCENTRATION PERCENTILE ESTIMATES FROM THE NATIONAL SEWAGE SLUDGE 2001 SURVEY - PCBs Nonparametric Substitution Method Estimation Procedure - Nondetects Set to % ML Cumulative Distribution for Dioxins/Furans/PCBs ANALYTE EPISODE QTYHALF 7 7 7 7 7 7 6 6 6 6 6 6 6 6 6 6 6 6 6 6 5 5 5 5 5 5 5 5 5 5 5 4. 4. .8608 .7248 .5962 .5883 .4087 .0184 .8972 .7598 . 6966 .5897 .5686 .4903 .4513 .3907 .3756 .3094 .2420 .1189 .0291 .0212 .9394 .8625 .8116 .7142 .6631 .6353 .5178 .4588 .4393 .2424 .1450 .5971 .2000 0.73130 0.72983 0.69613 0 . 69466 0.69320 0.69284 0.69248 0.69102 0.69066 0.65695 0.62324 0.58953 0.58209 0.54838 0.54692 0.53947 0.53202 0.53056 0.49685 0.49539 0.49392 0.49246 0.45875 0.45130 0.44984 0.44838 0.44691 0.43947 0.40576 0.39831 0.39087 0.38940 0.35569 detect if at least one congener is measured above the minimum level. Using WHO set of TEFs C-17 ------- EPA / NSSS 15:55 19SEP01 M:\PW\SLUDGE\REQ165\R165AK10.SAS NATIONAL POLLUTANT CONCENTRATION PERCENTILE ESTIMATES FROM THE NATIONAL SEWAGE SLUDGE 2001 SURVEY - PCBs Nonparametric Substitution Method Estimation Procedure - Nondetects Set to ^ ML Cumulative Distribution for Dioxins/Furans/PCBs ANALYTE EPISODE QTYHALF 4. 4. 4. 3 3 3 3 3 3 2 2 2 1 1 1 1 1 1 1 1 1 1 1 1 1 1 0 .1669 .0901 .0763 .7558 .5951 .4290 .3979 .1042 .0567 .6203 .4690 .2426 .0547 .9448 .8074 .7252 .6298 .6000 .4606 .4361 .3688 .2920 .2849 .2811 .1356 .0782 .0619 .7716 0.34825 0.34080 0.33335 0.32591 0.31846 0.31810 0.28439 0.28293 0.27548 0.26804 0.26059 0.25314 0.25168 0.21797 0.21053 0.17682 0.17535 0.16791 0.13420 0.12675 0.09304 0.05933 0.05787 0.05042 0.04896 0.04860 0.04116 0.00745 detect if at least one congener is measured above the minimum level. Using WHO set of TEFs C-18 ------- EPA / NSSS 15:55 19SEP01 M:\PW\SLUDGE\REQ165\R165AK10.SAS NATIONAL POLLUTANT CONCENTRATION PERCENTILE ESTIMATES FROM THE NATIONAL SEWAGE SLUDGE 2001 SURVEY - DIOXINS/FUJWNS/PCBS Nonparametric Substitution Method Estimation Procedure - Nondetects Set to zero Cumulative Distribution for Dioxins/Furans/PCBs ANALYTE EPISODE 6345 6377 6437 6346 6407 6341 6358 6429 6389 6385 6434 6350 6347 6421 6352 6353 6431 6355 6418 6361 6420 6411 6349 6340 6424 6435 6357 6415 6393 6369 6427 6402 6382 718 468 122 110 90 80 78 68 59 59 57 57 54 54 52 47 47 46 42 42 40 39 38 38 37 36 35 35 34 32 31 2 9 27 .246 . 969 .733 .321 .672 .422 .581 .014 . 609 .213 .522 .137 .902 .764 .822 .764 .516 .486 .476 .172 .743 .644 .541 .273 .526 .796 . 947 .833 .434 .602 .390 .307 .618 1.00000 0.99854 0.99109 0.98963 0.98927 0.98781 0.98634 0.95263 0.95117 0.94971 0.94226 0.94190 0.94154 0.94008 0.93263 0.93228 0.93192 0.93045 0.89675 0.89528 0.89492 0.89346 0.88601 0.88566 0.88419 0.85048 0.84304 0.84268 0.83523 0.80152 0.79408 0.79261 0.79226 b Composites considered a detect if at least one congener is measured above the minimum level. Using WHO set of TEFs C-19 ------- EPA / NSSS 15:55 19SEP01 M:\PW\SLUDGE\REQ165\R165AK10.SAS NATIONAL POLLUTANT CONCENTRATION PERCENTILE ESTIMATES FROM THE NATIONAL SEWAGE SLUDGE 2001 SURVEY - DIOXINS/FUJWNS/PCBS Nonparametric Substitution Method Estimation Procedure - Nondetects Set to zero Cumulative Distribution for Dioxins/Furans/PCBs ANALYTE EPISODE 6395 6433 6351 6400 6356 6430 6363 6390 6423 6426 6436 6406 6354 6387 6428 6409 6368 6365 6379 6386 6364 6381 6370 6378 6376 6348 6394 6392 6338 6344 6375 6342 25 25 24 23 23 23 23 23 22 22 21 21 19 19 19 19 18 18 18 18 17 17 17 16 16 16 16 15 15 .659 .425 .063 .866 .816 . 696 .534 .281 .968 .321 .736 .077 . 767 . 665 .515 .249 .795 .657 .424 .069 .773 .196 .015 .710 .556 .438 .288 .834 .600 0.70848 0.70104 0.69359 0.65988 0.62617 0.62471 0.61726 0.58355 0.58209 0.58062 0.57318 0.53947 0.50576 0.49831 0.49087 0.48940 0.48196 0.47451 0.44080 0.43934 0.43788 0.43043 0.42298 0.41554 0.41407 0.40663 0.40516 0.39772 0.39027 C-20 ------- EPA / NSSS 15:55 19SEP01 M:\PW\SLUDGE\REQ165\R165AK10.SAS NATIONAL POLLUTANT CONCENTRATION PERCENTILE ESTIMATES FROM THE NATIONAL SEWAGE SLUDGE 2001 SURVEY - DIOXINS/FUJWNS/PCBS Nonparametric Substitution Method Estimation Procedure - Nondetects Set to zero Cumulative Distribution for Dioxins/Furans/PCBs ANALYTE EPISODE 6374 6416 6410 6414 6404 6373 6413 6396 6405 6360 6372 6339 6380 6401 6419 6438 6359 6384 6383 6425 6371 6367 6391 6366 6412 6403 6399 6343 15 15 13 13 13 13 12 12 11 11 11 10 10 10 9 9 9 8 8 7 7 6 6 6 4 4 4 2 429 318 998 622 423 042 881 207 971 653 591 976 741 313 805 767 230 187 110 544 467 543 267 014 926 722 699 930 0 . 35656 0.35510 0.32139 0.31394 0. 1248 0. 0503 0. 0357 0. 0321 0.29576 0.29430 0.28685 0.27941 0.27196 0.23825 0.23679 0.22934 0.22788 0.22043 0.21299 0.17928 0.14557 0.14521 0.11150 0.07779 0.04408 0.04262 0.00891 0.00745 detect if at least one congener is measured above the minimum level. Using WHO set of TEFs C-21 ------- EPA / NSSS 15:55 19SEP01 M:\PW\SLUDGE\REQ165\R165AK10.SAS NATIONAL POLLUTANT CONCENTRATION PERCENTILE ESTIMATES FROM THE NATIONAL SEWAGE SLUDGE 2001 SURVEY - DIOXINS/FUJWNS/PCBS Nonparametric Substitution Method Estimation Procedure - Nondetects Set to ML Cumulative Distribution for Dioxins/Furans/PCBs EPISODE QUANTITY detect if at least one congener is measured above the minimum level. Using WHO set of TEFs C-22 ------- EPA / NSSS 15:55 19SEP01 M:\PW\SLUDGE\REQ165\R165AK10.SAS NATIONAL POLLUTANT CONCENTRATION PERCENTILE ESTIMATES FROM THE NATIONAL SEWAGE SLUDGE 2001 SURVEY - DIOXINS/FUJWNS/PCBS Nonparametric Substitution Method Estimation Procedure - Nondetects Set to ML Cumulative Distribution for Dioxins/Furans/PCBs EPISODE QUANTITY 35 34 31 29 29 28 28 27 27 26 26 26 26 25 25 25 25 25 23 23 23 23 23 23 23 23 23 23 22 22 21 21 21 .983 .774 .490 . 867 .307 .578 .074 .115 .061 .861 . 656 .475 .438 .825 . 759 .755 .579 .428 . 976 .966 .883 .706 .534 .518 .331 .119 .092 .018 .921 .881 .971 .969 .625 0.77174 0.76429 0.73058 0.72912 0.72167 0.72131 0.71985 0.68614 0.67870 0.64499 0.61128 0.60383 0.57012 0.56268 0.55523 0.54778 0.54034 0.53887 0.50516 0.47145 0.46999 0.46254 0.45510 0.42139 0.38768 0.38622 0.38475 0.38329 0.38183 0.37438 0.37402 0.37256 0.36511 detect if at least one congener is measured above the minimum level. Using WHO set of TEFs C-23 ------- EPA / NSSS 15:55 19SEP01 M:\PW\SLUDGE\REQ165\R165AK10.SAS NATIONAL POLLUTANT CONCENTRATION PERCENTILE ESTIMATES FROM THE NATIONAL SEWAGE SLUDGE 2001 SURVEY - DIOXINS/FUJWNS/PCBS Nonparametric Substitution Method Estimation Procedure - Nondetects Set to ML Cumulative Distribution for Dioxins/Furans/PCBs EPISODE QUANTITY 20 19 19 19 19 18 18 17 17 16 16 16 16 16 15 15 15 14. 14. 14. 13 12 12 11 11 . 4 63 .955 . 765 .349 .306 .795 .474 .819 .467 .810 .693 .538 .417 .164 .800 .732 .186 .972 .849 .098 .080 .851 .307 .753 .691 0.36365 0.36219 0.35474 0.34729 0.33985 0.33240 0.32495 0.32349 0.28978 0.28942 0.28796 0.25425 0.25279 0.21908 0.18537 0.15166 0.15020 0.14873 0.11502 0.11356 0.10611 0.09867 0.06496 0.05751 0.05007 detect if at least one congener is measured above the minimum level. Using WHO set of TEFs C-24 ------- EPA / NSSS 15:55 19SEP01 M:\PW\SLUDGE\REQ165\R165AK10.SAS NATIONAL POLLUTANT CONCENTRATION PERCENTILE ESTIMATES FROM THE NATIONAL SEWAGE SLUDGE 2001 SURVEY - DIOXINS/FUJWNS/PCBS Nonparametric Substitution Method Estimation Procedure - Nondetects Set to ^ ML Cumulative Distribution for Dioxins/Furans/PCBs ANALYTE EPISODE 6345 6377 6437 6346 6385 6407 6341 6358 6369 6364 6429 6389 6434 6350 6347 6421 6352 6359 6340 6353 6431 6355 6418 6361 6424 6420 6411 6349 6435 6357 6415 6395 6393 718 470 127 110 99 90 80 78 72 68 68 59 7 7 5 4 52 49 48 47 47 46 42 42 41 40 39 38 7 6 5 5 34 246 244 738 321 263 685 447 581 652 171 014 609 522 187 302 764 822 320 328 764 516 536 488 172 930 794 644 541 796 222 908 230 604 1.00000 0.99854 0.99109 0.98963 0.98927 0.98182 0.98036 0.97890 0.94519 0.93774 0.90403 0.90257 0.90110 0.90075 0.90039 0.89892 0.89148 0.89112 0.88367 0.88221 0.88185 0.88039 0.84668 0.84522 0.84486 0.81115 0.80969 0.80224 0.80188 0.79444 0.79408 0.78663 0.77918 C-25 ------- EPA / NSSS 15:55 19SEP01 M:\PW\SLUDGE\REQ165\R165AK10.SAS NATIONAL POLLUTANT CONCENTRATION PERCENTILE ESTIMATES FROM THE NATIONAL SEWAGE SLUDGE 2001 SURVEY - DIOXINS/FUJWNS/PCBS Nonparametric Substitution Method Estimation Procedure - Nondetects Set to ^ ML Cumulative Distribution for Dioxins/Furans/PCBs ANALYTE EPISODE 6404 6427 6402 6382 6339 6433 6351 6400 6356 6397 6430 6409 6387 6363 6390 6423 6426 6436 6406 6354 6428 6348 6392 6344 6378 6370 6365 6374 6416 6368 6379 6375 6386 34 31 29 28 27 27 27 25 25 25 25 24 24 23 23 23 23 23 22 22 22 22 21 21 .287 .440 .307 .098 .677 .061 .019 .775 .709 .590 . 269 .817 .299 .921 .891 .701 .534 .306 .993 .621 .297 .065 .606 .363 0.74548 0.73803 0.73657 0.73621 0.73474 0.72730 0.69359 0.65988 0.65243 0.64499 0.63754 0.60383 0.59638 0.56268 0.52897 0.52750 0.52006 0.48635 0.48488 0.48342 0.47597 0.44227 0.43482 0.42737 detect if at least one congener is measured above the minimum level. Using WHO set of TEFs C-26 ------- EPA / NSSS 15:55 19SEP01 M:\PW\SLUDGE\REQ165\R165AK10.SAS NATIONAL POLLUTANT CONCENTRATION PERCENTILE ESTIMATES FROM THE NATIONAL SEWAGE SLUDGE 2001 SURVEY - DIOXINS/FUJWNS/PCBS Nonparametric Substitution Method Estimation Procedure - Nondetects Set to ^ ML Cumulative Distribution for Dioxins/Furans/PCBs ANALYTE EPISODE 6381 6376 6373 6413 6405 6394 6338 6342 6401 6419 6414 6410 6425 6371 6396 6380 6360 6372 6367 6391 6366 6412 6403 6438 6399 6384 6383 6343 C-27 ------- APPENDIX D: EMPIRICAL CUMULATIVE DISTRIBUTIONS OF NATIONAL Toxic EQUIVALENTS FROM THE 2001 NATIONAL SEWAGE SLUDGE SURVEY BY FLOW GROUPS Exhibit 1—Dioxin and Furan TEQs - POTWs with Flows of > 1 MOD Nondetects Set to Zero D-l Nondetects Set to One-half ML D-4 Nondetects Set to ML D-7 Exhibit 2—Coplanar PCB TEQs - POTWs with Flows of > 1 MOD Nondetects Set to Zero D-10 Nondetects Set to One-half ML D-13 Nondetects Set to ML D-16 Exhibit 3—Total Dioxin/Furan/Coplanar PCB TEQ - POTWs with Flows of > 1 MOD Nondetects Set to Zero D-19 Nondetects Set to One-half ML D-22 Nondetects Set to ML D-25 Exhibit 4 —Dioxin and Furan TEQs - POTWs with Flows of < 1 MOD Nondetects Set to Zero D-28 Nondetects Set to One-half ML D-29 Nondetects Set to ML D-30 Exhibit 5—Coplanar PCB TEQs - POTWs with Flows of < 1 MOD Nondetects Set to Zero D-31 Nondetects Set to One-half ML D-32 Nondetects Set to ML D-33 Exhibit 6—Total Dioxin/Furan/Coplanar PCB TEQ - POTWs with Flows of < 1 MOD Nondetects Set to Zero D-34 Nondetects Set to One-half ML D-35 Nondetects Set to ML D-36 ------- EPA / NSSS 15:09 13NOV01 M:\PW\SLUDGE\REQ165\R165AK20.SAS 2 NATIONAL POLLUTANT CONCENTRATION PERCENTILE ESTIMATES FROM THE NATIONAL SEWAGE SLUDGE 2001 SURVEY - DioxiNS/FURANS NOHPARAMETRIC SUBSTITUTION METHOD ESTIMATION PROCEDURE - NONDETECTS SET TO ZERO INCLUDES ONLY POTWs WITH FLOWS OF > 1 MGD ANALYTE DlOXIN/FURANS EPISODE QTY LOW 6345 6377 6437 6346 6407 6389 6429 6385 6434 6421 6350 6347 6435 6353 6352 6431 6361 6340 6418 6411 6369 6420 6402 6349 6357 6395 6382 6423 6397 6341 6354 6415 6400 6427 6365 682 466. 121. 93. 63. 56. 56. 55. 53. 49. 46. 45. 36. 36. 34. 34. 34. 34. 33. 29. 28. 28. 28. 27. 26. 25. 25. 22. 22. 22. 20. 20. 20. 19. 19. .30 15 35 15 32 21 02 21 93 33 05 43 34 15 83 78 76 34 07 42 83 58 17 78 66 98 40 42 32 15 69 45 21 96 24 1.00000 0.99499 0.96950 0.96449 0.96326 0.95825 0.95324 0.94823 0.92274 0.92152 0.89602 0.89480 0.88979 0.86430 0.86307 0.86185 0.85684 0.85561 0.85060 0.84559 0.82010 0.79461 0.78960 0.78837 0.78715 0.78592 0.76043 0.75542 0.72993 0.70444 0.69943 0.67393 0.64844 0.62295 0.61794 D-l ------- EPA / NSSS 15:09 13NOV01 M:\PW\SLUDGE\REQ165\R165AK20.SAS NATIONAL POLLUTANT CONCENTRATION PERCENTILE ESTIMATES FROM THE NATIONAL SEWAGE SLUDGE 2001 SURVEY - DIOXINS/FURANS NONPARAMETRIC SUBSTITUTION METHOD ESTIMATION PROCEDURE - NONDETECTS SET TO ZERO INCLUDES ONLY POTWs WITH FLOWS OF > 1 MGD EPISODE DIOXIN/FURANS 2TY LOW 6368 6409 6390 6378 6356 6376 6386 6344 6436 6406 6392 6375 6394 6370 6374 6348 6414 6381 6404 6413 6338 6373 6405 6410 6401 6360 6339 6379 6419 6396 6372 6359 6384 6371 6412 18.89 18.46 18.21 17.72 17.19 17.12 16.33 15.50 15.45 15.38 15.18 15.08 14.98 14.55 14.42 14.02 13.33 13.30 12.49 10.86 10.20 10.10 10.07 9.83 9.40 9.03 8.93 8.42 8.34 8.01 7.51 6.74 6.27 5.71 4.24 0.61293 0.58744 0.56195 0.55694 0.53144 0.50595 0.48046 0.45497 0.42948 0.42447 0.41946 0.39396 0.36847 0.36346 0.35845 0.35344 0.32795 0.32294 0.31793 0.29244 0.29121 0.28620 0.28119 0.27618 0.25069 0.24568 0.22019 0.19470 0.16921 0.14371 0.11822 0.09273 0.06724 0.04175 0.04052 D-2 ------- EPA / NSSS 15:09 13NOV01 M:\PW\SLUDGE\REQ165\R165AK20.SAS NATIONAL POLLUTANT CONCENTRATION PERCENTILE ESTIMATES FROM THE NATIONAL SEWAGE SLUDGE 2001 SURVEY - DIOXINS/FURANS NONPARAMETRIC SUBSTITUTION METHOD ESTIMATION PROCEDURE - NONDETECTS SET TO ZERO INCLUDES ONLY POTWs WITH FLOWS OF > 1 MGD ANALYTE EPISODE QTY_LOW P DIOXIN/FURANS 6399 4.06 0.03551 6343 2.71 0.03050 6438 2.17 0.00501 D-3 ------- EPA / NSSS 15:09 13NOV01 M:\PW\SLUDGE\REQ165\R165AK20.SAS NATIONAL POLLUTANT CONCENTRATION PERCENTILE ESTIMATES FROM THE NATIONAL SEWAGE SLUDGE 2001 SURVEY - DIOXINS/FURANS NONPARAMETRIC SUBSTITUTION METHOD ESTIMATION PROCEDURE - NONDETECTS SET TO % ML INCLUDES ONLY POTWs WITH FLOWS OF > 1 MGD EPISODE DIOXIN/FURANS O.TYHALF 6345 6377 6437 6346 6407 6389 6429 6385 6434 6421 6350 6347 6435 6353 6352 6431 6361 6340 6418 6411 6369 6420 6402 6349 6357 6395 6382 6397 6423 6341 6354 6415 6400 6427 6365 682 466. 121. 93. 63. 56. 56. 55. 53. 49. 46. 45. 36. 36. 34. 34. 34. 34. 33. 29. 28. 28. 28. 27. 26. 26. 25. 22. 22. 22. 20. 20. 20. 20. 19. .30 15 35 15 32 21 02 26 93 33 10 83 34 15 83 78 76 39 07 42 88 63 17 78 91 13 86 49 42 17 99 50 26 01 29 1.00000 0.99499 0.96950 0.96449 0.96326 0.95825 0.95324 0.94823 0.92274 0.92152 0.89602 0.89480 0.88979 0.86430 0.86307 0.86185 0.85684 0.85561 0.85060 0.84559 0.82010 0.79461 0.78960 0.78837 0.78715 0.78592 0.76043 0.75542 0.72993 0.70444 0.69943 0.67393 0.64844 0.62295 0.61794 D-4 ------- EPA / NSSS 15:09 13NOV01 M:\PW\SLUDGE\REQ165\R165AK20.SAS NATIONAL POLLUTANT CONCENTRATION PERCENTILE ESTIMATES FROM THE NATIONAL SEWAGE SLUDGE 2001 SURVEY - DIOXINS/FURANS NONPARAMETRIC SUBSTITUTION METHOD ESTIMATION PROCEDURE - NONDETECTS SET TO % ML INCLUDES ONLY POTWs WITH FLOWS OF > 1 MGD EPISODE DIOXIN/FURANS O.TYHALF 6368 6409 6390 6378 6356 6376 6386 6344 6436 6406 6392 6375 6394 6370 6374 6348 6414 6381 6404 6413 6338 6373 6405 6410 6401 6339 6360 6379 6419 6396 6372 6359 6384 6371 6412 18.94 18.51 18.26 17.77 17.24 17.17 16.33 15.55 15.45 15.40 15.23 15.15 15.03 14.57 14.47 14.07 13.38 13.30 12.60 10.86 10.25 10.10 10.07 9.88 9.45 9.20 9.08 8.47 8.39 8.06 7.56 6.79 6.32 5.71 4.34 0.61293 0.58744 0.56195 0.55694 0.53144 0.50595 0.48046 0.45497 0.42948 0.42447 0.41946 0.39396 0.36847 0.36346 0.35845 0.35344 0.32795 0.32294 0.31793 0.29244 0.29121 0.28620 0.28119 0.27618 0.25069 0.24568 0.22019 0.19470 0.16921 0.14371 0.11822 0.09273 0.06724 0.04175 0.04052 D-5 ------- EPA / NSSS 15:09 13NOV01 M:\PW\SLUDGE\REQ165\R165AK20.SAS NATIONAL POLLUTANT CONCENTRATION PERCENTILE ESTIMATES FROM THE NATIONAL SEWAGE SLUDGE 2001 SURVEY - DIOXINS/FURANS NONPARAMETRIC SUBSTITUTION METHOD ESTIMATION PROCEDURE - NONDETECTS SET TO H ML INCLUDES ONLY POTWs WITH FLOWS OF > 1 MGD ANALYTE EPISODE O.TYHALF P DIOXIN/FURANS 6399 4.11 0.03551 6343 2.76 0.03050 6438 2.22 0.00501 D-6 ------- EPA / NSSS 15:09 13NOV01 M:\PW\SLUDGE\REQ165\R165AK20.SAS NATIONAL POLLUTANT CONCENTRATION PERCENTILE ESTIMATES FROM THE NATIONAL SEWAGE SLUDGE 2001 SURVEY - DIOXINS/FURANS NONPARAMETRIC SUBSTITUTION METHOD ESTIMATION PROCEDURE - NONDETECTS SET TO ML INCLUDES ONLY POTWs WITH FLOWS OF > 1 MGD EPISODE DIOXIN/FURANS QUANTITY 6345 6377 6437 6346 6407 6389 6429 6385 6434 6421 6347 6350 6435 6353 6352 6431 6361 6340 6418 6411 6369 6420 6402 6349 6357 6382 6395 6397 6423 6341 6354 6415 6400 6427 6365 682 466. 121. 93. 63. 56. 56. 55. 53. 49. 46. 46. 36. 36. 34. 34. 34. 34. 33. 29. 28. 28. 28. 27. 27. 26. 26. 22. 22. 22. 21. 20. 20. 20. 19. .30 15 35 15 32 21 02 31 93 33 23 15 34 15 83 78 76 44 07 42 93 68 17 78 16 31 29 65 42 20 29 55 31 06 34 1.00000 0.99499 0.96950 0.96449 0.96326 0.95825 0.95324 0.94823 0.92274 0.92152 0.89602 0.89101 0.88979 0.86430 0.86307 0.86185 0.85684 0.85561 0.85060 0.84559 0.82010 0.79461 0.78960 0.78837 0.78715 0.78592 0.78091 0.75542 0.72993 0.70444 0.69943 0.67393 0.64844 0.62295 0.61794 D-7 ------- EPA / NSSS 15:09 13NOV01 M:\PW\SLUDGE\REQ165\R165AK20.SAS NATIONAL POLLUTANT CONCENTRATION PERCENTILE ESTIMATES FROM THE NATIONAL SEWAGE SLUDGE 2001 SURVEY - DIOXINS/FURANS NONPARAMETRIC SUBSTITUTION METHOD ESTIMATION PROCEDURE - NONDETECTS SET TO ML INCLUDES ONLY POTWs WITH FLOWS OF > 1 MGD EPISODE DIOXIN/FURANS QUANTITY 6368 6409 6390 6378 6356 6376 6386 6344 6436 6406 6392 6375 6394 6370 6374 6348 6414 6381 6404 6413 6338 6373 6405 6410 6401 6339 6360 6379 6419 6396 6372 6359 6384 6371 6412 18.99 18.56 18.31 17.82 17.29 17.22 16.33 15.60 15.45 15.43 15.28 15.21 15.08 14.60 14.52 14.12 13.43 13.30 12.71 10.86 10.30 10.10 10.07 9.93 9.50 9.47 9.13 8.52 8.44 8.11 7.61 6.84 6.37 5.71 4.45 0.61293 0.58744 0.56195 0.55694 0.53144 0.50595 0.48046 0.45497 0.42948 0.42447 0.41946 0.39396 0.36847 0.36346 0.35845 0.35344 0.32795 0.32294 0.31793 0.29244 0.29121 0.28620 0.28119 0.27618 0.25069 0.24568 0.22019 0.19470 0.16921 0.14371 0.11822 0.09273 0.06724 0.04175 0.04052 D-8 ------- EPA / NSSS 15:09 13NOV01 M:\PW\SLUDGE\REQ165\R165AK20.SAS NATIONAL POLLUTANT CONCENTRATION PERCENTILE ESTIMATES FROM THE NATIONAL SEWAGE SLUDGE 2001 SURVEY - DIOXINS/FURANS NONPARAMETRIC SUBSTITUTION METHOD ESTIMATION PROCEDURE - NONDETECTS SET TO ML INCLUDES ONLY POTWs WITH FLOWS OF > 1 MGD ANALYTE EPISODE QUANTITY P DIOXIN/FURANS 6399 4.16 0.03551 6343 2.81 0.03050 6438 2.27 0.00501 D-9 ------- EPA / NSSS 15:09 13NOV01 M:\PW\SLUDGE\REQ165\R165AK20.SAS NATIONAL POLLUTANT CONCENTRATION PERCENTILE ESTIMATES FROM THE NATIONAL SEWAGE SLUDGE 2001 SURVEY - PCBs NONPARAMETRIC SUBSTITUTION METHOD ESTIMATION PROCEDURE - NONDETECTS SET TO ZERO INCLUDES ONLY POTWs WITH FLOWS OF > 1 MGD ANALYTE EPISODE QTf LOW 6341 6345 6407 6352 6346 6415 6431 6420 6429 6353 6427 6350 6379 6349 6411 6347 6418 6357 6356 6436 6438 6406 6361 6338 6390 6400 6421 6381 6396 6410 6372 6385 6340 6369 6434 58 35. 27. 17. 17. 15. 12. 12. 11. 11. 11. 11. 10. 10. 10. 9. 9. 9. 8. 7. 7. 7. 7. 6. 5. 5. 5. 5. 4. 4. 4. 4. 3. 3. 3. .27 95 35 99 17 38 74 16 99 61 43 09 83 76 23 48 41 29 47 84 60 59 41 24 61 52 44 12 20 17 08 00 93 77 60 1 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. .00000 99499 98998 98497 98375 98252 95703 95202 94701 94200 94077 93576 93454 90905 90782 88233 87732 87231 87108 84559 84058 83557 83056 82934 82433 81932 79383 76833 76332 73783 71234 68685 66136 65635 63085 D-10 ------- EPA / NSSS 15:09 13NOV01 M:\PW\SLUDGE\REQ165\R165AK20.SAS NATIONAL POLLUTANT CONCENTRATION PERCENTILE ESTIMATES FROM THE NATIONAL SEWAGE SLUDGE 2001 SURVEY - PCBs NONPARAMETRIC SUBSTITUTION METHOD ESTIMATION PROCEDURE - NONDETECTS SET TO ZERO INCLUDES ONLY POTWs WITH FLOWS OF > 1 MGD ANALYTE EPISODE QTf LOW 6370 6389 6397 6348 6373 6377 6360 6359 6386 6382 6339 6413 6384 6405 6371 6394 6354 6419 6395 6437 6392 6409 6423 6402 6374 6404 6401 6344 6368 6375 6412 6399 6435 6414 6365 3 3. 3. 3. 2. 2. 2. 2. 2. 2. 2. 2. 1. 1. 1. 1. 1. 1. 1. 1. 1. 1. 1. 1. 1. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. .52 40 10 00 94 82 62 49 47 22 05 02 92 90 76 73 63 47 46 39 38 31 28 14 00 94 91 79 77 75 69 64 46 29 28 0 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. .62963 62462 61961 59412 56862 56361 53812 51263 48714 46165 45664 43114 42992 40443 39942 39819 39318 36769 34220 31671 31170 28620 26071 23522 23399 22899 20349 19848 17299 14750 12201 11700 11199 08650 08149 D-ll ------- EPA / NSSS 15:09 13NOV01 M:\PW\SLUDGE\REQ165\R165AK20.SAS NATIONAL POLLUTANT CONCENTRATION PERCENTILE ESTIMATES FROM THE NATIONAL SEWAGE SLUDGE 2001 SURVEY - PCBs NONPARAMETRIC SUBSTITUTION METHOD ESTIMATION PROCEDURE - NONDETECTS SET TO ZERO INCLUDES ONLY POTWs WITH FLOWS OF > 1 MGD ANALYTE EPISODE QTY_LOW P PCBs 6343 0.22 0.07648 6376 0.07 0.05098 6378 0.05 0.02549 D-12 ------- EPA / NSSS 15:09 13NOV01 M:\PW\SLUDGE\REQ165\R165AK20.SAS NATIONAL POLLUTANT CONCENTRATION PERCENTILE ESTIMATES FROM THE NATIONAL SEWAGE SLUDGE 2001 SURVEY - PCBs NONPARAMETRIC SUBSTITUTION METHOD ESTIMATION PROCEDURE - NONDETECTS SET TO % ML INCLUDES ONLY POTWs WITH FLOWS OF > 1 MGD EPISODE O.TYHALF 6341 6385 6369 6359 6345 6407 6404 6339 6352 6346 6415 6340 6431 6420 6429 6353 6427 6350 6379 6349 6411 6347 6418 6357 6395 6356 6348 6373 6436 6438 6406 6361 6413 6405 6371 58.27 44.00 43.77 42.53 35.95 27.36 21.69 18.48 17.99 17.17 15.41 13.94 12.74 12.16 11.99 11.61 11.43 11.09 10.83 10.76 10.23 9.48 9.42 9.31 9.10 8.47 8.00 7.97 7.86 7.60 7.59 7.41 7.02 6.90 6.76 1.00000 0.99499 0.96950 0.94401 0.91851 0.91350 0.90849 0.88300 0.85751 0.85629 0.85506 0.82957 0.82456 0.81955 0.81454 0.80953 0.80830 0.80329 0.80207 0.77658 0.77535 0.74986 0.74485 0.73984 0.73861 0.71312 0.68763 0.66214 0.65713 0.65212 0.64711 0.64210 0.64087 0.63965 0.63464 D-13 ------- EPA / NSSS 15:09 13NOV01 M:\PW\SLUDGE\REQ165\R165AK20.SAS NATIONAL POLLUTANT CONCENTRATION PERCENTILE ESTIMATES FROM THE NATIONAL SEWAGE SLUDGE 2001 SURVEY - PCBs NONPARAMETRIC SUBSTITUTION METHOD ESTIMATION PROCEDURE - NONDETECTS SET TO H ML INCLUDES ONLY POTWs WITH FLOWS OF > 1 MGD ANALYTE EPISODE O.TYHALF 6419 6437 6392 6409 6338 6374 6370 6401 6344 6412 6399 6390 6400 6421 6343 6381 6396 6410 6377 6372 6375 6434 6389 6397 6378 6360 6386 6382 6384 6394 6354 6435 6414 6423 6365 6 6. 6. 6. 6. 6. 6. 5. 5. 5. 5. 5. 5. 5. 5. 5. 4. 4. 4. 4. 3. 3. 3. 3. 3. 2. 2. 2. 1. 1. 1. 1. 1. 1. 1. .49 39 38 31 24 03 02 94 81 71 66 64 52 44 24 14 20 17 09 08 76 60 40 10 06 62 47 24 94 73 63 46 29 28 28 0 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. .63341 60792 60291 57742 55193 54692 54191 53690 53189 50640 50139 49638 49137 46587 44038 41489 40988 38439 35890 33340 30791 28242 28119 27618 25069 22520 19971 17422 16921 14371 13871 11321 08772 08271 05722 D-14 ------- EPA / NSSS 15:09 13NOV01 M:\PW\SLUDGE\REQ165\R165AK20.SAS NATIONAL POLLUTANT CONCENTRATION PERCENTILE ESTIMATES FROM THE NATIONAL SEWAGE SLUDGE 2001 SURVEY - PCBs NONPARAMETRIC SUBSTITUTION METHOD ESTIMATION PROCEDURE - NONDETECTS SET TO H ML INCLUDES ONLY POTWs WITH FLOWS OF > 1 MGD ANALYTE EPISODE O.TYHALF P PCBs 6402 1.14 0.05221 6376 1.08 0.05098 6368 0.77 0.02549 D-15 ------- EPA / NSSS 15:09 13NOV01 M:\PW\SLUDGE\REQ165\R165AK20.SAS NATIONAL POLLUTANT CONCENTRATION PERCENTILE ESTIMATES FROM THE NATIONAL SEWAGE SLUDGE 2001 SURVEY - PCBs NONPARAMETRIC SUBSTITUTION METHOD ESTIMATION PROCEDURE - NONDETECTS SET TO ML INCLUDES ONLY POTWs WITH FLOWS OF > 1 MGD EPISODE QUANTITY 6385 6369 6359 6341 6404 6345 6339 6407 6340 6352 6346 6395 6415 6348 6373 6431 6420 6413 6429 6405 6371 6353 6419 6427 6437 6392 6409 6350 6374 6401 6344 6379 6349 6412 6399 84 83. 82. 58. 42. 35. 34. 27. 23. 17. 17. 16. 15. 13. 12. 12. 12. 12. 11. 11. 11. 11. 11. 11. 11. 11. 11. 11. 11. 10. 10. 10. 10. 10. 10. .00 77 57 27 44 95 91 37 94 99 17 73 43 00 99 74 16 02 99 90 76 61 52 43 40 38 31 09 05 96 84 83 76 74 69 1 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. .00000 97451 94902 92352 91851 89302 88801 86252 85751 85250 85128 85005 82456 79907 77357 76856 76355 75854 75732 75231 74730 74607 74485 71936 71435 70934 68385 65835 65713 65212 64711 62162 59612 59490 58989 D-16 ------- EPA / NSSS 15:09 13NOV01 M:\PW\SLUDGE\REQ165\R165AK20.SAS NATIONAL POLLUTANT CONCENTRATION PERCENTILE ESTIMATES FROM THE NATIONAL SEWAGE SLUDGE 2001 SURVEY - PCBs NONPARAMETRIC SUBSTITUTION METHOD ESTIMATION PROCEDURE - NONDETECTS SET TO ML INCLUDES ONLY POTWs WITH FLOWS OF > 1 MGD ANALYTE EPISODE QUANTITY 6343 6411 6347 6418 6357 6370 6356 6436 6438 6406 6361 6375 6338 6378 6390 6400 6421 6377 6381 6396 6410 6372 6434 6389 6397 6360 6386 6435 6414 6365 6382 6376 6384 6394 6354 10 10. 9. 9. 9. 8. 8. 7. 7. 7. 7. 6. 6. 6. 5. 5. 5. 5. 5. 4. 4. 4. 3. 3. 3. 2. 2. 2. 2. 2. 2. 2. 1. 1. 1. .27 23 48 43 34 52 47 89 60 59 41 76 24 06 66 52 44 37 17 20 17 08 60 40 10 62 47 46 30 29 27 08 97 73 63 0 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. .58488 55939 53390 52889 52388 52265 51764 49215 48714 48213 47712 47589 45040 44539 41990 41489 38940 36391 33841 33340 30791 28242 25693 25570 25069 22520 19971 17422 14872 14371 13871 13370 10820 08271 07770 D-17 ------- EPA / NSSS 15:09 13NOV01 M:\PW\SLUDGE\REQ165\R165AK20.SAS NATIONAL POLLUTANT CONCENTRATION PERCENTILE ESTIMATES FROM THE NATIONAL SEWAGE SLUDGE 2001 SURVEY - PCBs NONPARAMETRIC SUBSTITUTION METHOD ESTIMATION PROCEDURE - NONDETECTS SET TO ML INCLUDES ONLY POTWs WITH FLOWS OF > 1 MGD ANALYTE EPISODE QUANTITY P PCBs 6423 1.29 0.05221 6402 1.14 0.02672 6368 0.77 0.02549 D-18 ------- EPA / NSSS 15:09 13NOV01 M:\PW\SLUDGE\REQ165\R165AK20.SAS NATIONAL POLLUTANT CONCENTRATION PERCENTILE ESTIMATES FROM THE NATIONAL SEWAGE SLUDGE 2001 SURVEY - TOTAL DIOXINS/FURANS/PCBS NOHPARAMETRIC SUBSTITUTION METHOD ESTIMATION PROCEDURE - NONDETECTS SET TO ZERO INCLUDES ONLY POTWs WITH FLOWS OF > 1 MGD ANALYTE EPISODE QTf LOW TOTAL DIOXINS/FURANS/PCBS 6345 6377 6437 6346 6407 6341 6429 6389 6385 6434 6350 6347 6421 6352 6353 6431 6418 6361 6420 6411 6349 6340 6435 6357 6415 6369 6427 6402 6382 6395 6400 6356 6397 6390 6423 718.25 468 122 110 90. 80. 68. 59. 59. 57. 57. 54. 54. 52. 47. 47. 42. 42. 40. 39. 38. 38. 36. 35. 35. 32. 31. 29. 27. 27. 25. 25. 25. 23. 23. .97 .73 .32 67 42 01 61 21 52 14 90 76 82 76 52 48 17 74 64 54 27 80 95 83 60 39 31 62 43 72 66 42 82 70 1.00000 0.99499 0.96950 0.96449 0.96326 0.95825 0.95324 0.94823 0.94322 0.91773 0.91651 0.91528 0.91027 0.88478 0.88355 0.88233 0.87732 0.87231 0.87108 0.86607 0.84058 0.83936 0.83435 0.80885 0.80763 0.78214 0.75665 0.75164 0.75041 0.74540 0.71991 0.69442 0.66892 0.64343 0.63842 D-19 ------- EPA / NSSS 15:09 13NOV01 M:\PW\SLUDGE\REQ165\R165AK20.SAS NATIONAL POLLUTANT CONCENTRATION PERCENTILE ESTIMATES FROM THE NATIONAL SEWAGE SLUDGE 2001 SURVEY - TOTAL DIOXINS/FURANS/PCBS NOHPARAMETRIC SUBSTITUTION METHOD ESTIMATION PROCEDURE - NONDETECTS SET TO ZERO INCLUDES ONLY POTWs WITH FLOWS OF > 1 MGD EPISODE TOTAL DIOXINS/FURANS/PCBS 2TY LOW 6436 6406 6354 6409 6368 6365 6379 6386 6381 6370 6378 6376 6348 6394 6392 6338 6344 6375 6374 6410 6414 6404 6373 6413 6396 6405 6360 6372 6339 6401 6419 6438 6359 6384 6371 23.28 22.97 22.32 19.77 19.67 19.51 19.25 18.79 18.42 18.07 17.77 17.20 17.01 16.71 16.56 16.44 16.29 15.83 15.43 14.00 13.62 13.42 13.04 12.88 12.21 11.97 11.65 11.59 10.98 10.31 9.80 9.77 9.23 8.19 7.47 0.61293 0.60792 0.60291 0.57742 0.55193 0.52643 0.52142 0.49593 0.47044 0.46543 0.46042 0.43493 0.40944 0.38394 0.37894 0.35344 0.34843 0.32294 0.29745 0.29244 0.26695 0.26194 0.23645 0.23144 0.23021 0.20472 0.19971 0.17422 0.14872 0.12323 0.11822 0.09273 0.08772 0.06223 0.03674 D-20 ------- EPA / NSSS 15:09 13NOV01 M:\PW\SLUDGE\REQ165\R165AK20.SAS NATIONAL POLLUTANT CONCENTRATION PERCENTILE ESTIMATES FROM THE NATIONAL SEWAGE SLUDGE 2001 SURVEY - TOTAL DIOXINS/FURANS/PCBS NOHPARAMETRIC SUBSTITUTION METHOD ESTIMATION PROCEDURE - NONDETECTS SET TO ZERO INCLUDES ONLY POTWs WITH FLOWS OF > 1 MGD ANALYTE EPISODE QTY_LOW P TOTAL DIOXINS/FURANS/PCBS 6412 4.93 0.03551 6399 4.70 0.03050 6343 2.93 0.02549 D-21 ------- EPA / NSSS 15:09 13NOV01 M:\PW\SLUDGE\REQ165\R165AK20.SAS NATIONAL POLLUTANT CONCENTRATION PERCENTILE ESTIMATES FROM THE NATIONAL SEWAGE SLUDGE 2001 SURVEY - TOTAL DIOXINS/FURANS/PCBS NOHPARAMETRIC SUBSTITUTION METHOD ESTIMATION PROCEDURE - NONDETECTS SET TO H ML INCLUDES ONLY POTWs WITH FLOWS OF > 1 MGD ANALYTE EPISODE TOTAL DIOXINS/FURANS/PCBS O.TYHALF 6345 6377 6437 6346 6385 6407 6341 6369 6429 6389 6434 6350 6347 6421 6352 6359 6340 6353 6431 6418 6361 6420 6411 6349 6435 6357 6415 6395 6404 6427 6402 6382 6339 6400 6356 718.25 470 127 110 99. 90. 80. 72. 68. 59. 57. 57. 55. 54. 52. 49. 48. 47. 47. 42. 42. 40. 39. 38. 37. 36. 35. 35. 34. 31. 29. 28. 27. 25. 25. .24 .74 .32 26 68 45 65 01 61 52 19 30 76 82 32 33 76 52 49 17 79 64 54 80 22 91 23 29 44 31 10 68 77 71 1.00000 0.99499 0.96950 0.96449 0.96326 0.93777 0.93276 0.92775 0.90226 0.89725 0.89224 0.89101 0.88979 0.88478 0.85929 0.85806 0.83257 0.82756 0.82633 0.82132 0.81632 0.81509 0.81008 0.78459 0.78336 0.75787 0.75665 0.73115 0.70566 0.68017 0.67516 0.67393 0.66892 0.64343 0.61794 D-22 ------- EPA / NSSS 15:09 13NOV01 M:\PW\SLUDGE\REQ165\R165AK20.SAS NATIONAL POLLUTANT CONCENTRATION PERCENTILE ESTIMATES FROM THE NATIONAL SEWAGE SLUDGE 2001 SURVEY - TOTAL DIOXINS/FURANS/PCBS NOHPARAMETRIC SUBSTITUTION METHOD ESTIMATION PROCEDURE - NONDETECTS SET TO H ML INCLUDES ONLY POTWs WITH FLOWS OF > 1 MGD ANALYTE EPISODE TOTAL DIOXINS/FURANS/PCBS O.TYHALF 6397 6409 6390 6423 6436 6406 6354 6348 6392 6344 6378 6370 6365 6374 6368 6379 6375 6386 6381 6376 6373 6413 6405 6394 6338 6401 6419 6414 6410 6371 6396 6360 6372 6412 6438 25.59 24 23 23 23 22 22 22 21 21 20 20 20 20 19 19 18 18 18 18 18 17 16 16 16 15 14 14 14 12 12 11 11 10 9. .82 .89 .70 .31 .99 .62 .06 .61 .36 .83 .59 .57 .50 .72 .30 .90 .79 .45 .25 .07 .88 .97 .76 .49 .39 .88 .68 .05 .47 .26 .70 .64 .06 82 0.59245 0.56696 0.54146 0.53645 0.51096 0.50595 0.50094 0.47545 0.44996 0.42447 0.39897 0.37348 0.36847 0.36346 0.35845 0.33296 0.30747 0.28198 0.25648 0.25147 0.22598 0.22097 0.21975 0.21474 0.20973 0.20472 0.19971 0.17422 0.16921 0.14371 0.14249 0.11700 0.09151 0.06601 0.06100 D-23 ------- EPA / NSSS 15:09 13NOV01 M:\PW\SLUDGE\REQ165\R165AK20.SAS NATIONAL POLLUTANT CONCENTRATION PERCENTILE ESTIMATES FROM THE NATIONAL SEWAGE SLUDGE 2001 SURVEY - TOTAL DIOXINS/FURANS/PCBS NOHPARAMETRIC SUBSTITUTION METHOD ESTIMATION PROCEDURE - NONDETECTS SET TO H ML INCLUDES ONLY POTWs WITH FLOWS OF > 1 MGD ANALYTE EPISODE O.TYHALF P TOTAL DioxiNS/FURANS/PCBs 6399 9.77 0.05599 6384 8.26 0.05098 6343 8.01 0.02549 D-24 ------- EPA / NSSS 15:09 13NOV01 M:\PW\SLUDGE\REQ165\R165AK20.SAS NATIONAL POLLUTANT CONCENTRATION PERCENTILE ESTIMATES FROM THE NATIONAL SEWAGE SLUDGE 2001 SURVEY - TOTAL DIOXINS/FURANS/PCBS NOHPARAMETRIC SUBSTITUTION METHOD ESTIMATION PROCEDURE - NONDETECTS SET TO ML INCLUDES ONLY POTWs WITH FLOWS OF > 1 MGD ANALYTE EPISODE TOTAL DIOXINS/FURANS/PCBS QUANTITY 6345 6377 6385 6437 6369 6346 6407 6359 6341 6429 6389 6340 6434 6350 6347 6404 6421 6352 6353 6431 6339 6395 6418 6361 6420 6411 6435 6349 6357 6415 6427 6409 6402 6382 6348 718.25 471 139 132 112 110 90. 89. 80. 68. 59. 58. 57. 57. 55. 55. 54. 52. 47. 47. 44. 43. 42. 42. 40. 39. 38. 38. 36. 35. 31. 29. 29. 28. 27. .52 .31 .74 .70 .32 70 41 47 01 61 38 52 24 70 15 76 82 76 52 38 03 50 17 84 64 80 54 50 98 49 87 31 58 11 1.00000 0.99499 0.96950 0.94401 0.93900 0.91350 0.91228 0.90727 0.88178 0.87677 0.87176 0.86675 0.86174 0.86051 0.85929 0.85428 0.82879 0.80329 0.80207 0.80084 0.79583 0.77034 0.74485 0.73984 0.73861 0.73360 0.70811 0.68262 0.68139 0.68017 0.65468 0.64967 0.62417 0.62295 0.61794 D-25 ------- EPA / NSSS 15:09 13NOV01 M:\PW\SLUDGE\REQ165\R165AK20.SAS NATIONAL POLLUTANT CONCENTRATION PERCENTILE ESTIMATES FROM THE NATIONAL SEWAGE SLUDGE 2001 SURVEY - TOTAL DIOXINS/FURANS/PCBS NOHPARAMETRIC SUBSTITUTION METHOD ESTIMATION PROCEDURE - NONDETECTS SET TO ML INCLUDES ONLY POTWs WITH FLOWS OF > 1 MGD ANALYTE EPISODE TOTAL DIOXINS/FURANS/PCBS QUANTITY 6392 6344 6400 6356 6397 6374 6390 6378 6423 6436 6370 6373 6406 6354 6413 6405 6375 6365 6401 6419 6368 6379 6376 6386 6381 6371 6394 6338 6414 6412 6399 6410 6343 6396 6360 26.66 26 25 25 25 25 23 23 23 23 23 23 23 22 22 21 21 21 20 19 19 19 19 18 18 17 16 16 15 15 14 14 13 12 11 .44 .82 .76 .75 .58 .97 .88 .71 .33 .12 .09 .02 .92 .88 .97 .97 .62 .46 .95 .77 .35 .31 .79 .47 .47 .81 .54 .73 .19 .85 .10 .08 .31 .75 0.59245 0.56696 0.54146 0.51597 0.49048 0.46499 0.45998 0.45497 0.42948 0.40398 0.39897 0.39396 0.38895 0.38394 0.35845 0.35723 0.35222 0.32673 0.32172 0.31671 0.29121 0.26572 0.24023 0.21474 0.18925 0.18424 0.18301 0.17800 0.17299 0.16798 0.16297 0.15796 0.13247 0.10698 0.08149 D-26 ------- EPA / NSSS 15:09 13NOV01 M:\PW\SLUDGE\REQ165\R165AK20.SAS NATIONAL POLLUTANT CONCENTRATION PERCENTILE ESTIMATES FROM THE NATIONAL SEWAGE SLUDGE 2001 SURVEY - TOTAL DIOXINS/FURANS/PCBS NOHPARAMETRIC SUBSTITUTION METHOD ESTIMATION PROCEDURE - NONDETECTS SET TO ML INCLUDES ONLY POTWs WITH FLOWS OF > 1 MGD ANALYTE EPISODE QUANTITY P TOTAL DIOXINS/FURANS/PCBS 6372 11.69 0.05599 6438 9.87 0.03050 6384 8.34 0.02549 D-27 ------- EPA / NSSS 15:09 13NOV01 M:\PW\SLUDGE\REQ165\R165AK20.SAS NATIONAL POLLUTANT CONCENTRATION PERCENTILE ESTIMATES FROM THE NATIONAL SEWAGE SLUDGE 2001 SURVEY - DIOXINS/FURANS NONPARAMETRIC SUBSTITUTION METHOD ESTIMATION PROCEDURE - NONDETECTS SET TO ZERO INCLUDES ONLY POTWs WITH FLOWS OF • •! MGD DIOXIN/FURANS EPISODE 6355 6424 6393 6351 6433 6430 6358 6428 6387 6363 6426 6364 6416 6380 6342 6383 6425 6391 6367 6366 6403 2TY_LOW 33.31 32.12 31.00 25.53 25.01 23.67 23.05 20.86 19.65 17.17 15.25 14.04 12.60 10.68 10.17 6.30 6.09 5.43 5.00 4.45 3.63 1.00000 0.95238 0.90476 0.85714 0.80952 0.76190 0.71429 0.66667 0.61905 0.57143 0.52381 0.47619 0.42857 0.38095 0.33333 0.28571 0.23810 0.19048 0.14286 0.09524 0.04762 D-28 ------- EPA / NSSS 15:09 13NOV01 M:\PW\SLUDGE\REQ165\R165AK20.SAS NATIONAL POLLUTANT CONCENTRATION PERCENTILE ESTIMATES FROM THE NATIONAL SEWAGE SLUDGE 2001 SURVEY - DIOXINS/FURANS NONPARAMETRIC SUBSTITUTION METHOD ESTIMATION PROCEDURE - NONDETECTS SET TO % ML INCLUDES ONLY POTWs WITH FLOWS OF • •! MGD DIOXIN/FURANS EPISODE 6355 6424 6393 6351 6433 6430 6358 6428 6387 6363 6426 6364 6416 6380 6342 6383 6425 6391 6367 6366 6403 O.TYHALF 33.36 32.21 31.17 25.58 25.01 23.67 23.05 20.93 19.70 17.22 15.25 14.50 12.65 10.73 10.24 6.35 6.23 5.48 5.05 4.50 3.73 1.00000 0.95238 0.90476 0.85714 0.80952 0.76190 0.71429 0.66667 0.61905 0.57143 0.52381 0.47619 0.42857 0.38095 0.33333 0.28571 0.23810 0.19048 0.14286 0.09524 0.04762 D-29 ------- EPA / NSSS 15:09 13NOV01 M:\PW\SLUDGE\REQ165\R165AK20.SAS NATIONAL POLLUTANT CONCENTRATION PERCENTILE ESTIMATES FROM THE NATIONAL SEWAGE SLUDGE 2001 SURVEY - DIOXINS/FURANS NONPARAMETRIC SUBSTITUTION METHOD ESTIMATION PROCEDURE - NONDETECTS SET TO ML INCLUDES ONLY POTWs WITH FLOWS OF • •! MGD DIOXIN/FURANS EPISODE 6355 6424 6393 6351 6433 6430 6358 6428 6387 6363 6426 6364 6416 6380 6342 6383 6425 6391 6367 6366 6403 QUANTITY 33.41 32.30 31.34 25.63 25.01 23.67 23.05 20.99 19.75 17.27 15.25 14.97 12.70 10.78 10.32 6.40 6.37 5.53 5.10 4.55 3.83 1.00000 0.95238 0.90476 0.85714 0.80952 0.76190 0.71429 0.66667 0.61905 0.57143 0.52381 0.47619 0.42857 0.38095 0.33333 0.28571 0.23810 0.19048 0.14286 0.09524 0.04762 D-30 ------- EPA / NSSS 15:09 13NOV01 M:\PW\SLUDGE\REQ165\R165AK20.SAS NATIONAL POLLUTANT CONCENTRATION PERCENTILE ESTIMATES FROM THE NATIONAL SEWAGE SLUDGE 2001 SURVEY - PCBs NONPARAMETRIC SUBSTITUTION METHOD ESTIMATION PROCEDURE - NONDETECTS SET TO ZERO INCLUDES ONLY POTWs WITH FLOWS OF • »1 MGD ANALYTE EPISODE 6358 6355 6426 6363 6342 6424 6364 6393 6416 6387 6433 6383 6366 6367 6425 6403 6391 6351 6430 6428 6380 2TY_LOW 55.54 13.18 8.28 6.69 5.43 5.40 4.62 3.43 2.72 08 05 81 56 54 45 09 0.84 0.43 0.39 0.21 0.06 1.00000 0.95238 0.90476 0.85714 0.80952 0.76190 0.71429 0.66667 0.61905 0.57143 0.52381 0.47619 0.42857 0.38095 0.33333 0.28571 0.23810 0.19048 0.14286 0.09524 0.04762 D-31 ------- EPA / NSSS 15:09 13NOV01 M:\PW\SLUDGE\REQ165\R165AK20.SAS NATIONAL POLLUTANT CONCENTRATION PERCENTILE ESTIMATES FROM THE NATIONAL SEWAGE SLUDGE 2001 SURVEY - PCBs NONPARAMETRIC SUBSTITUTION METHOD ESTIMATION PROCEDURE - NONDETECTS SET TO H ML INCLUDES ONLY POTWs WITH FLOWS OF • »1 MGD ANALYTE EPISODE O.TYHALF 6358 6364 6355 6424 6426 6416 6363 6366 6367 6425 6403 6391 6342 6387 6393 6433 6383 6430 6351 6428 6380 55 53. 13. 9. 8. 7. 6. 6. 6. 6. 6. 5. 5. 4. 3. 2. 1. 1. 1. 1. 1. .54 67 18 72 28 72 70 59 57 45 12 86 46 60 43 05 81 60 44 37 06 1.00000 0.95238 0.90476 0.85714 0.80952 0.76190 0.71429 0.66667 0.61905 0.57143 0.52381 0.47619 0.42857 0.38095 0.33333 0.28571 0.23810 0.19048 0.14286 0.09524 0.04762 D-32 ------- EPA / NSSS 15:09 13NOV01 M:\PW\SLUDGE\REQ165\R165AK20.SAS NATIONAL POLLUTANT CONCENTRATION PERCENTILE ESTIMATES FROM THE NATIONAL SEWAGE SLUDGE 2001 SURVEY - PCBs NONPARAMETRIC SUBSTITUTION METHOD ESTIMATION PROCEDURE - NONDETECTS SET TO ML INCLUDES ONLY POTWs WITH FLOWS OF • »1 MGD ANALYTE EPISODE QUANTITY 6364 6358 6424 6355 6416 6366 6367 6425 6403 6391 6426 6387 6363 6342 6393 6430 6428 6351 6380 6433 6383 102 55. 14. 13. 12. 11. 11. 11. 11. 10. 8. 7. 6. 5. 3. 2. 2. 2. 2. 2. 1. .72 54 04 18 73 61 59 45 14 89 28 11 70 48 43 81 52 44 07 05 81 1.00000 0.95238 0.90476 0.85714 0.80952 0.76190 0.71429 0.66667 0.61905 0.57143 0.52381 0.47619 0.42857 0.38095 0.33333 0.28571 0.23810 0.19048 0.14286 0.09524 0.04762 D-33 ------- EPA / NSSS 15:09 13NOV01 M:\PW\SLUDGE\REQ165\R165AK20.SAS NATIONAL POLLUTANT CONCENTRATION PERCENTILE ESTIMATES FROM THE NATIONAL SEWAGE SLUDGE 2001 SURVEY - TOTAL DIOXINS/FURANS/PCBS NOHPARAMETRIC SUBSTITUTION METHOD ESTIMATION PROCEDURE - NONDETECTS SET TO ZERO INCLUDES ONLY POTWs WITH FLOWS OF • »1 MGD ANALYTE EPISODE TOTAL DIOXINS/FURANS/PCBS 6358 6355 6424 6393 6433 6351 6430 6363 6426 6387 6428 6364 6342 6416 6380 6383 6425 6367 6391 6366 6403 2TY_LOW 78.58 46.49 37.53 34.43 27.06 25.96 24.06 23.87 23.53 21.74 21.08 18.66 15.60 15.32 10.74 8.11 7.54 6.54 6.27 6.01 4.72 1.00000 0.95238 0.90476 0.85714 0.80952 0.76190 0.71429 0.66667 0.61905 0.57143 0.52381 0.47619 0.42857 0.38095 0.33333 0.28571 0.23810 0.19048 0.14286 0.09524 0.04762 D-34 ------- EPA / NSSS 15:09 13NOV01 M:\PW\SLUDGE\REQ165\R165AK20.SAS NATIONAL POLLUTANT CONCENTRATION PERCENTILE ESTIMATES FROM THE NATIONAL SEWAGE SLUDGE 2001 SURVEY - TOTAL DIOXINS/FURANS/PCBS NOHPARAMETRIC SUBSTITUTION METHOD ESTIMATION PROCEDURE - NONDETECTS SET TO H ML INCLUDES ONLY POTWs WITH FLOWS OF • »1 MGD ANALYTE TOTAL DIOXINS/FURANS/PCBS EPISODE 6358 6364 6355 6424 6393 6433 6351 6430 6387 6363 6426 6428 6416 6342 6425 6380 6367 6391 6366 6403 6383 O.TYHALF 78.58 68.17 46.54 41.93 34.60 27.06 27.02 25.27 24.30 23.92 23.53 22.30 20.37 15.70 12.68 11.80 11.62 11.34 11.09 9.85 8.16 1.00000 0.95238 0.90476 0.85714 0.80952 0.76190 0.71429 0.66667 0.61905 0.57143 0.52381 0.47619 0.42857 0.38095 0.33333 0.28571 0.23810 0.19048 0.14286 0.09524 0.04762 D-35 ------- EPA / NSSS 15:09 13NOV01 M:\PW\SLUDGE\REQ165\R165AK20.SAS NATIONAL POLLUTANT CONCENTRATION PERCENTILE ESTIMATES FROM THE NATIONAL SEWAGE SLUDGE 2001 SURVEY - TOTAL DIOXINS/FURANS/PCBS NOHPARAMETRIC SUBSTITUTION METHOD ESTIMATION PROCEDURE - NONDETECTS SET TO ML INCLUDES ONLY POTWs WITH FLOWS OF • »1 MGD ANALYTE TOTAL DIOXINS/FURANS/PCBS EPISODE 6364 6358 6355 6424 6393 6351 6433 6387 6430 6416 6363 6426 6428 6425 6367 6391 6366 6342 6403 6380 6383 QUANTITY 117.69 78.58 46.59 46.33 34.77 28.07 27.06 26.86 26.48 25.43 23.98 23.53 23.52 17.82 16.69 16.42 16.16 15.80 14.97 12.85 8.21 1.00000 0.95238 0.90476 0.85714 0.80952 0.76190 0.71429 0.66667 0.61905 0.57143 0.52381 0.47619 0.42857 0.38095 0.33333 0.28571 0.23810 0.19048 0.14286 0.09524 0.04762 D-36 ------- |