Annual Water Sampling and Analysis at the Salmon Test Site Area Lamar County, Mississippi April 2007 by James R. Harris, Jr. Prepared for the U.S. Department of Energy, Office of Legacy Management under Interagency Agreement DE-AI01-07LM00095 RADIATION AND INDOOR ENVIRONMENTS NATIONAL LABORATORY OFFICE OF RADIATION AND INDOOR AIR U.S. ENVIRONMENTAL PROTECTION AGENCY P.O.BOX 98517 LAS VEGAS, NV 89193-8517 ------- Annual Water Sampling and Analysis at the Salmon Test Site Area Lamar County, Mississippi April 2007 by James R. Harris, Jr. Prepared for the U.S. Department of Energy, Office of Legacy Management under Interagency Agreement DE-AI01-07LM00095 RADIATION AND INDOOR ENVIRONMENTS NATIONAL LABORATORY OFFICE OF RADIATION AND INDOOR AIR U.S. ENVIRONMENTAL PROTECTION AGENCY P.O.BOX 98517 LAS VEGAS, NV 89193-8517 ------- NOTICE The information in this document has been funded wholly or in part by the United States Environmental Protection Agency (EPA) through Interagency Agreement (LAG) DE-AI01-07LM00095 from the United States Department of Energy (DOE)-National Energy Technology Laboratory and Office of Legacy Management. This supersedes Agreement No. DE-AI0896NV11969, from the United States Department of Energy (DOE). The EPA (IAG) identification number RW-89-92243501-0 is a continuation of EPA- Reference RW89-937611-01. This document has been subjected to the Agency's peer and administrative reviews, and it has been approved for publication as an EPA document. Mention of trade names or commercial products does not constitute endorsement or recommendation for use. 11 ------- ABSTRACT The Long-Term Hydrological Monitoring Program (LTHMP), directed by the EPA, conducts annual water sampling on and around the Salmon Test Site Area. In 1964 and 1966, nuclear explosives were detonated approximately 2,700 feet (823 m) underground at the Salmon Test Site Area located in Lamar County, Mississippi. Drilling and clean-up activities have resulted in tritium contamination in close proximity to the surface ground zero. In this report, the 2007 annual water sampling at the Salmon Site is described, and the analytical results of the collected samples are given. The highest tritium concentration onsite was 6.2 x 101 pCi/L in water from well SA1-1H (see Appendix B). No radioactivity attributable to the test site was found in any offsite water sample. The highest tritium concentration offsite was 16.3 ± 6.9 pCi/L at the James D. Lowe pond. Negative values for tritium are obtained when the counts registered on the liquid scintillation counter for a regular sample are less than the average counts obtained for the fossil water samples used as background samples. The average background counts are deducted from the sample counts to correct for background radiation affecting the detector in the scintillation counter. It is normal to get some negative values for samples with little or no tritium in them due to statistical counting variations; hence environmental samples are at background levels. The incidence of negative results is slightly higher this year than in past years due to a change in the scintillation cocktail used for counting. We are no longer able to use the Beckman ReadySafe scintillation cocktail used in previous years because a change in the formulation has substantially raised the background counts from around 3.5 to 12 counts per minute. The result is to nearly double the detection limit and the 2-sigma error for the samples is unacceptable. All of the replacement scintillation cocktails show a slightly greater variability in counting resulting in more instances where the average background counts exceed the counts for the low activity samples. We are now using EcoLume liquid scintillation cocktail. All samples were also analyzed for the presence of gamma-ray emitting radionuchdes. None were detected above the minimum detectable concentration (MDC) (see Appendix B). in ------- This page is left blank intentionally. IV ------- CONTENTS Page Notice ii Abstract iii Contents v Figures vi Acronyms and Abbreviations vii/viii Acknowledgments ix Introduction 1 History 1 Historical Monitoring Results 2 Figures 1-7 3-8 Sample Collection 9 Sample Analysis 10 Water Analysis Results 10/11 References 12 Glossary of Terms 13/14 Appendices A. Summary of Analytical Procedures 15 B. Gamma/Tritium Results for Water Samples Collected in April 2007 16/17 C. R&IE's LTHMP related SOPs 18 ------- FIGURES Figure Number Page 1 General site location of Project Salmon Test Site Area 3 2 Topographic map of the Salmon Test Site Area showing the Surface Ground Zero and outline of Test Area at 2,700 feet below land surface 4 3 Test cavity and aquifers 5 4 Tritium concentration vs. sampling year for HM-S (depth = 30 ft) 6 5 Tritium concentration vs. sampling year for HM-L (depth = 200 ft) 6 6 List of Onsite past and present sampling locations 2007 7 7 List of Offsite past and present sampling locations 2007 8 VI ------- ACRONYMS AND ABBREVIATIONS AEC Bq/L 13?Cs 60Co CERMER CRQA DCG DOE EPA Frac Tank 3H+ HpGe HM-L, HM-L2 HM-S HM-1 HM-2a HM-2b HMO 1AG 1TC 131I keV kg kt L LTHMP m MCL MDA MDC MeV min mL MT ORIA pCi/L PHS REECo U.S. Atomic Energy Commission Becquerel per liter Cesium-137 Cobalt-60 Center for Environmental Restoration Monitoring and Emergency Response Center for Radioanalysis and Quality Assurance Derived Concentration Guide U.S. Department of Energy U.S. Environmental Protection Agency storage container gram Tritium Enriched Tritium high purity germanium gamma detector Hydrological Monitoring Well - Local Aquifer Hydrological Monitoring Well - Surficial Aquifer Hydrological Monitoring Well - Aquifer 1 Hydrological Monitoring Well - Aquifer 2a Hydrological Monitoring Well - Aquifer 2b Hydrological Monitoring Well - Aquifer 3 Interagency Agreement International Technology Corporation Iodine-131 kilo electron volts = thousand electron volts kilogram, 1000 grams kiloton (TNT equivalent) liter Long Term Hydrological Monitoring Program meter maximum contaminant level minimum detectable activity minimum detectable concentration one million electron volts minute milliliter = one thousandth of a liter megaton (one million tons TNT equivalent) Office of Radiation and Indoor Air picocuries per liter = 10"12 curies per liter = 1/1,000,000,000,000 curies per liter U.S. Public Health Service Reynolds Electrical & Engineering Company vn ------- ACRONYMS AND ABBREVIATIONS Continued R&IE Radiation and Indoor Environments National Laboratory, Las Vegas, NV 90Sr Strontium-90 SA Wells Source Area Wells SGZ surface ground zero USGS U.S. Geological Survey 131Xe Xenon-131 133Xe Xenon-133 Vlll ------- ACKNOWLEDGMENTS External peer review was provided by Vernon Hodge, Ph.D., Department of Chemistry, University of Nevada, Las Vegas. In addition, the author would like to acknowledge George Dilbeck, Ph.D., and Richard Flotard, Ph.D., as internal reviewers. Thanks also to Natalia Brooks, Mark Ovrebo and Steve McLemore, of the General Dynamics Corp, IT contractors, for their assistance and significant contributions in production of this report. Below are representative pictures of the DOE monument that displays the information of the actual sites detonations. The historical captions depict depths, dates, warnings which are located on plates, front and back on the granite monument standing at Surface Ground Zero. IX ------- INTRODUCTION Under an Interagency Agreement (IAG) with the DOE, the EPA's Radiation and Indoor Environments National Laboratory (R&IE) located in Las Vegas, NV, conducts annual sampling to measure radioactivity in water sources near the sites of underground nuclear explosions. The results provide assurance that radioactive materials from the tests have not migrated into potable drinking water supplies. This report presents the results for samples collected under EPA's LTHMP in April 2007, on and around the Salmon Test Site Area, Lamar County, Mississippi. History Project Dribble, consisting of two nuclear explosions, and Project Miracle Play, consisting of two non-nuclear gas explosions, were conducted in the Salmon Test Site Area, near Baxterville, Lamar County, Mississippi, between 1964 and 1970. The general area is depicted in Figure 1. The Salmon Test Site Area (Figure 2) contains approximately 1,470 acres located in Sections 11,12, 13, and 14, Township 2 North, Range 16 West. Test Date Name Type Yield (kt) 10-22-64 Salmon Nuclear 5.3 12-03-66 Sterling Nuclear 0.38 02-02-69 Diode Tube Gas 0.32 04-19-70 Humid Water Gas 0.32 These tests were part of the Vela Uniform Program of the U.S. Atomic Energy Commission (a predecessor agency of the DOE). The purpose was to measure and evaluate the phenomena of seismic waves that are induced from the explosions as compared to those that occur naturally from earthquakes. The first explosion, the Salmon Event, created a cavity in the salt dome underlying the test area. The top of the cavity is 1,160 feet (354 m) below the top of the salt dome which lies 1,500 feet (457 m) below the land surface (Figure 3). The Salmon detonation cavity was subsequently used to contain the next three explosions as described in the plagues on the previous page. Following each detonation, the surrounding area was closely monitored by the U.S. Public Health Service (PHS). Radiological monitoring became the responsibility of the EPA at its inception in 1970, and after the second site cleanup operation in 1971-72, the LTHMP was instituted. In this program, all potable aquifers, several wells, public water supplies, and selected surface waters in the vicinity of the Salmon Test Site are sampled on an annual basis and analyzed to determine the presence of tritium, gamma and other radioactive contaminants. ------- Historical Monitoring Results The disposal of drilling mud and fluids near the surface ground zero (SGZ) is responsible for tritium (3H) contamination of the soil zone and underlying shallow aquifer. These waters lie at depths of 4 to 10 feet (1.2 to 3 m) and 30 feet (9 m), respectively, and are not potable. Tritium contamination is also present in the potable water of the local aquifer which lies at about 200 feet (61 m). The observed 3H concentration in the local aquifer is significantly below the 20,000 pCi/L guideline specified in the National Primary Drinking Water Regulations; Radionuclides; Final Rule (40CFR9/141/142), and is thought to be due to drilling activities at the site (Fenske and Humphrey, 1980; Fordham andFenske, 1985). ------- Prentiss •* Monticello Seminary Bassfield \ { Moselle Eatonville Runnelstown Bunker Sumral Hill Hattiesburg Richton Purvis Talowah Tylertown - i _,. Pmebur MISSISSIPPI ]_ Baxterville LOUISIANA " T ""> '11 Major Highway Test Site, SGZ Figure 1. General site location of Project Salmon Test Site Area. ------- UL/^M» **JM» «I__»M»*K_» 4^*1. _ YVMRS wm auOTCoM •mm nNn tMa dnto 0(1400 (Ml (480 n) SALMON TEST SHE AREA BOUNDARY approx. 1 1/2mUo* N 60ALCMFOT Figure 2. Topographic Map of the Salmon Test Site Area showing Surface Ground Zero and outline of Test Area at 2,700 feet below land surface. ------- CITRONELLE AQUIFER HALF MOON CREEK ALLUVIAL AQUIFER WELL HT-2 TEST CAVITY SALT DOME* HIGHLY RADIOACTIVE MATERIAL GROUND SURFACE LOCAL AQUIFER AQUIFER 1 AQUIFER 2A ] AQUIFER 28 AQUIFER 3A AQUIFER 38 AQUIFER 4 AQUIFERS FLUID LEVEL RECRYSTALLIZED MELT PUDDLE LIMESTONE *Tne test cavi{y contains fission and activation products from tht detonations plus 10,770 cubic yards of radioactive, contaminated soils and 1,305,000 gallons of SANDSTONE contaminated fluids and water from surface cleanup. Figure 3. Salmon Site Test Cavity and Aquifers. ------- 40 | 30 X .?20 oo aoooSoo*^ SSSSot o\»o>9to\c*ON»<*ot0\ MMMMMMMM Calendar Year Figure 4. Tritium concentration vs. sampling year for HM-S (depth = 30 ft). 3000 2500 2000 X 1000 500 0 i I Measured D predicted MM Calendar Year Figure 5. Tritium concentration vs. sampling year for HM-L (depth = 200 ft). ------- Project Dribble Mississippi Well HM-L2 Half Moor • Huntin9 Tatum Club Well HMH-5B \ Creek SAM-LA ASA1-9-2 SA5-3-M >• SA5-4-4 A.SA5-2-M Well HT-2C t N Scale In Feet 1OOO LOCATION MAP Surface Ground Zero Water Sampling Locations New Wells Added in 1997 Mississippi Map is not to scale Lamar County Figure 6. List of Onsite past and present sampling locations 2007. 7 ------- Project Salmon Mississippi Gil Ray's Crawfish Pond Lower Little Creek #2 Howard Smith Pond Little Creek #1 - Lee Anderson Willie Surge I r- Joe Surge Roy Mills D. Napier Anderson's Pond B,R Anderson Rogers -W.H. Noble J Arteene Anderson Steve Cockemam R.L Anderson Jr Ray Daniels ^__ R L Anderson Sr . Daniel Jr. Daniel's Fish Pond Well #2 Lumberton City Well 2 01234 Scale in Kilometer* G.Ray Surface Ground Zero Water Sampling Locations Tatum Dome Test Area LOCATION MAP Mississippi Map is not to scale Latnar County Figure 7. List of Qffsite past and present sampling locations 2007. ------- Sample Collection According to standard operating procedures agreed to by DOE (U.S. DOE 1981), the shallow wells are first sampled, pumped-down, and resampled on the following day. Wells HM-1, HM-2A, HM-2B, HM-3, and HM-L, which lie adjacent to SGZ, were first sampled and then pumped steadily while further samples were taken at 30 minutes intervals until the pH and conductivity of the water stabilized. A final sample was taken from each well 30 minutes after stability was reached. Water samples were taken from sources near the SGZ area (i.e., Half Moon Creek, Half Moon Creek Overflow, and the Pond west of SGZ), before and after the pumping operations to identify any resulting changes in tritium concentration from previous years. Well HM-L2 was first sampled and then pumped for one hour before a second sample was taken and shut down. For wells with operating pumps, the samples were collected at the nearest convenient outlet. If the well has no pump, a truck-mounted or a submersible pump is used. Using this truck mounted unit, it is possible to collect three-liter samples from wells as deep as 1829 meters (6,000 ft.). The pH, conductivity, water temperature, and sampling water level was measured and recorded as each sample was collected. Waste water contained from wells HMH-5R, SA1-1-H was contained in a Frac Tank and then disposed of offsite by DOE, contractor Stoller. In November 2000, the U.S. DOE awarded a grant to Lamar County, Mississippi. The grant provided an extension of the current drinking water system around the Salmon Test Site. The water system eliminated the need to sample residential wells in the area and around the site. However, the EPA and the State of Mississippi will continue monitoring wells and surface locations onsite and offsite annually. The offsite sampling sites will consist of city wells in Purvis, Baxterville, Columbia, and Lumberton, as well as some local residents, ponds and streams. In 2002, the U.S. DOE plugged 33 wells on the Salmon Site. There are 28 wells, 3 mud pits, 1 pond, and 2 creek locations remaining in the LTHMP that will be sampled annually onsite. If the reader would like more information on the plugged wells, they should contact the U.S. DOE in Las Vegas, Nevada. The locations of all sampling sites are shown on pages 7 and 8. Sampling results are discussed in the sections that follow. ------- Sample Analysis Radiochemical laboratory procedures used to analyze the samples collected for this report are summarized in R&IE's SOPs (see Appendix A and C). These include standard methods to identify natural and man-made gamma-emitting radionuclides, tritium, plutonium, strontium, and uranium in water samples. Two types of tritium analyses are performed: conventional and electrolytic enrichment. The enrichment method lowers the minimum detectable concentration (MDC) from approximately 300 pCi/L to about 5 pCi/L. An upper activity limit of 800 pCi/L as specified in SOP RQA-603 has been established for the tritium enrichment method because sample cross-contamination becomes a problem at higher levels. In late 1995, it was decided that a maximum of 25 percent of all samples collected would be analyzed by the low-level enrichment method. This decision was based on the time required for analysis, budgetary constraints, and an assessment of past results. Under the current sampling and analysis protocols for the site, all samples are initially screened for tritium activity by the conventional method and selected samples enriched. At this time, only sampling locations that are in position to show migration are selected for enrichment. Sufficient sample is collected from new sampling locations to perform all routine analysis and a full-suite of other radiochemical determinations including assays for strontium-90, isotopic plutonium, and isotopic uranium. Water Analysis Results No radioactive materials from the Salmon Test Site Area were detected in any water sample collected offsite; nor were tritium concentrations above normal background values detected in any offsite sample. Gamma-ray spectral analysis results indicated that no man-made gamma-emitting radionuclides were detected in either onsite or offsite samples. The highest tritium concentration found onsite was 6.2 xlO3 pCi/L. This was detected in a water sample collected from Well SA1-1H which is a shallow well (40ft.) near SGZ. The water from this well is not available to the public, nor is it potable. Long-term decreasing trends in tritium concentrations are evident for onsite locations that have shown detectable tritium activity since monitoring began under the LTHMP in 1980 (wells HM-S and HM-L, depicted in Figures 4 and 5). In all, fifteen onsite sampling locations exhibited tritium concentrations above the MDC (Half Moon Creek, Pond West of GZ, Well E-7,Well HM-L Well HM-S, Well HMH-5R, Well HMH-16R, SA1-1H, SA1-2-H, SA1-3-H, SA-1-6H, SA1-8-L, SA3-4-H, SA3-11-3 and SA4-5-L.). Tritium concentrations in the offsite samples ranged from less than the MDC to 16.3 pCi/L (~ 0.6 Bq/L). These results are typical of background tritium levels and do not exceed the tritium activity expected in local precipitation. 10 ------- Water Analysis Results Continue Due to the high rainfall in the area, the sampling procedure for selected onsite wells was modified as follows: after collection of an initial sample, wells were purged and a second sample was collected the following day after the well had recharged. The second sample was representative of water that has infiltrated through the soil zone, where as the first sample may represent a mixture of direct rainwater influx at the top of the well and infiltrated soil zone water. A total of 21 of the 34 onsite locations were sampled in this manner (pre-and post- sampling): 8 yielded tritium activities greater than the MDC in either the first or second sample. Of these, all 8 yielded results higher than normal background (approximately 25 - 40 pCi/L [0.9 - 1.5 Bq/L]) as shown in Appendix B. The locations where the highest tritium activities were measured generally correspond to areas of known contamination. In summary, tritium concentrations in the water samples collected this year at the Salmon Site are consistent with those of past studies: Onsite tritium concentrations, were all below the 20,000 pCi/L maximum contaminant level (MCL) defined in EPA's National Primary Drinking Water Regulations; Radionuclides; Final Rule (40CFR9/141/142); and, the highest tritium concentration found offsite was 16.3 ± 6.9 pCi/L which was at the James D. Lowe Pond, (<1/10 of 1% (0.08%) of EPA's MCL. All samples were analyzed for presence of gamma-ray emitting radionuclides and none were detected (see Appendix B on pages 16-17). 11 ------- REFERENCES Final rule on Dec. 7,2000. Code of Federal Regulations, Vol. 65, Title 40, Parts 9, 141, and 142, December 7,2000, National Primary Drinking Water Regulations; Radionuclides; Final Rule. A Guide for Environmental Radiological Surveillance at U.S. Dept. of Energy Installations, July 1981,0ffice of Operational Safety Report. Las Vegas, NV: U.S. Department of Energy; DOE/EP-0023. Fenske, P. R.; Humphrey, T. M., Jr. The Tatum Dome Project Lamar County, Mississippi. Las Vegas, NV: U.S. Department of Energy, Nevada Operations Office; NVO-225; 1980. Fordham, J. W; Fenske, P. R. Tatum Dome Field Study Report and Monitoring Data Analysis, Las Vegas, NV: U.S. Department of Energy, Nevada Operations Office; DOE/NV/10384-03; 1985. 12 ------- GLOSSARY OF TERMS Background Radiation The radiation in man's environment, including cosmic rays and radiation from naturally-occurring and man-made radioactive elements, both outside and inside the bodies of humans and animals. The usually quoted average individual exposure from background radiation is 125 millirem per year in mid-latitudes at sea level (Shein & Terplak, 1984). Curie (Ci) The basic unit used to describe the rate of radioactive disintegration. The curie is equal to 37 billion disintegrations per second, which is the equivalent of 1 gram of radium. Named for Marie and Pierre Curie who discovered radium in 1898. One microcurie (uCi) is one millionth of a Ci. Isotope Atoms of the same element with different numbers of neutrons in the nuclei. Thus I2C, I3C, and I4C are isotopes of the element carbon, the numbers denoting the approximate atomic weights. Isotopes have very nearly the same chemical properties, but often different physical properties (for example 12 C and l3 C are stable, M C is radioactive). Enrichment Method A method of electrolytic concentration that increases the sensitivity of the analysis of tritium in water. This method is used by R&IE in selected samples if the tritium concentration is less than 800 pCi/L. Minimum Detectable Activity (MDA) Minimum detectable activity. Minimum Detectable Concentration (MDC) The smallest amount of radioactivity that can be reliably detected with a probability of Type I and Type II errors at 5 percent each (DOE 1981). Offsite Areas exclusive of the immediate Salmon Test Site Area. Onsite Refers to the immediate vicinity of the Salmon Test Site Area. Shallow ground water Water found near the soil surface, caused by precipitation infiltration of the soil. This shallow ground water is not an aquifer. 13 ------- GLOSSARY OF TERMS (Continue) Surflcial Aquifer The ground water layer located closest to the surface, generally at a depth of approximately 30 feet at SGZ. Tritium A radioactive isotope of hydrogen that decays by beta emission. Its half-life is about 12.5 years. Pre Sample First sample taken from wells onsite (before pumping). Post Sample Last sample taken from wells onsite (after recharge). Type I Error The statistical error of accepting the presence of radioactivity when none is present. Sometimes called alpha error. Type II Error The statistical error of failing to recognize the presence of radioactivity when it is present. Sometimes called beta error. 14 ------- Appendix A Summary of Analytical Procedures Type of Analysis HpGe Gamma b 3H 3H+ Enrichment (a) (b) Analytical C°unting H™*'" Approximate Equipment Perl°d Analytical Procedures Size ^.^ Limit . * (Min) counted HpGe detector 150 Radionuclide 3.5L Varies with calibrated at concentration quantified radionuclides and 0.5 from gamma spectral data detector used, keV/channel by online computer normally counted (0.04 to 2 program. to a MDC of MeV range). approx. 5 pCi/L Individual for Cs- 137. detector efficiencies ranging from 15 to 35%. Automatic 300 Sample prepared by 4 mL 300 pCi/L liquid distillation. scintillation counter. Automatic 300 Sample is distilled 5 mL 5 pCi/L liquid concentrated by scintillation electrolysis followed by counter. re-distillation. The detection limit is defined as the smallest amount of radioactivity that can be reliably detected, i.e., probability of Type I and Type II error at 5 percent each (DOE 1981). Gamma spectrometry using a high purity intrinsic germanium (HpGe) detector. Typical MDA Values for Gamma Spectroscopy ( 1 00 minute count time) Isotope Be-7 K-40 Cr-51 Mn-54 Co-57 Co-58 Fe-59 Co-60 Zn-65 Nb-95 Zr-95 Marinelli Water 3.5 liter MDA 4.56E+01 4.92E+01 5.88E+01 4.55E+01 9.65E+00 4.71E+00 1.07E-KH 5.38E+00 1.24E+01 5.64E+00 9.06E+00 Model Density Units Isotope Ru-106 Sn-113 Sb-125 1-131 Ba-133 Cs-134 Cs-137 Ce-144 Eu-152 Ra-226 U-235 Am-241 430G l.Og/mL pCi/L MDA 4.76E+01 8.32E+00 1.65E+01 8.28E+00 9.16E+00 6.12E+00 6.43E+00 7.59E+01 2.86E+01 1.58E+01 1.01E+02 6.60E+01 15 ------- Appendix B Gamma/Tritium Results for Water Samples Collected in April 2007 Collection oil • Sample Location 2007 Enriched Tritium Tritium pCi/L ± 2SD MDC pCi/L * 2SD Conimenls MDC Off-Site sampling locations Baxterville City Well Lower Little Creek #1 Lower Little Creek #2 Lumberton City Well #2 Purvis City Supply Well City Well 46-003-5-6-7 James D Lowe Pond Howard Smith Pond Thompson Blue Store Greenville Comm Or Nobles Pond B R Anderson Pond 4-16 4-16 4-16 4-17 10 ± 56<" 4-17 25 ± 50"' 4-17 4-16 163 ± 69 4-16 4-16 19 ± 56"' 4-16 4-16 4-16 (92) (82) (II) (94) 110 91 73 30 73 36 85 122 ± ± ± ± ± ± ± ± 182"» 182"> 181"' 180"' 178(a) 180"' 18I(" 182"' (296) (296) (296) (296) (296) (296) (296) (296) Background sample for HUB water la) Indicates results are less than MDC (b> No gamma radionuclides detected above MDC ND - Non-detected, MDC for gamma represents '"Cs (pCi/L) MDC - Minimum Detectable Concentration Appendix B Gamma/Tritium Results for Collection . •Mirirhpfl Sample Location Oil-Site sampling locations Well E-7 Half Moon pre Crock Post Half Moon Crk Overflow pre Half Moon Crk Overflow Post Well HMH-5R Pre Post Well HMH-I6R pre Post Well HM-S pre Post Well HM-L Pre l"30Mm 2nd 30 Mm 31" 30 Mm 4* 30 Mm Post Uale 2007 Tritium pCi/L ± 2 SD 4-16 25 ± 50"' 4-16 11 ± 53 4-17 90 ± 52 4-16 4-17 4-16 4-17 4-16 30 ±50 4-17 39 ±56 4-16 4-17 4-16 4-16 4-16 4-16 4-16 4-16 5.7 ± 53'" MDC (82) (83) (83) (73) (79) (86) Water Samples Collected in April 2007 Tritium pCi/L -48 101 2839 2865 434 450 310 352 101 -83 83 ± ± ± ± ± ± ± ± ± ± ± ± 2SD 180"' 183"' 156 157 11 10 188 189 183"' 179"' 183"' MDC (298) (298) (170) (170) (92) (88) (298) (298) (298) (298) (298) Comments 3 H (only) 3 H (only) 3 H (only) 3 H (only) 3 H (only) 3 H (only) Gamma Spcclronictry (b) pCi/L MDC ND ND ND ND ND ND ND ND ND ND ND ND (49) (47) (38) (49) (50) (49) (38) (48) (46) (49) (42) (49) Gamma Spcclronictry "" pCi/L MOC ND ND ND ND ND (49) (49) (38) (50) (49) ND ND ND ND ND ND (37) (48) (49) (4.6) (40) (50) 16 ------- Well HM-1 Pre 4-16 l"30Mm 4-16 2" 30 Mm 4-16 3ri30Mm 4-16 Post 4-16 Well HM-2A Pre 4-16 l"30Mm 4-16 2"d30Min 4-16 S-'SOMm 4-16 Post 4-16 Well HM-2B Pre 4-16 l"30Min 4-16 Post 4-16 Well HMO Pre 4-16 l"30Min 4-16 2nd 30 Mm 4-16 3rd 30 Mm 4-16 Post 4-16 RECCo Pit Dramage-A 4. i g RECCo Pit Dramage-B 4- 1 8 RECCo Pit Dramage-C 4-18 HM-L2 Pre 4-17 Post 4-17 Pond West of GZ Pre 4-16 Post 4-17 SAI-l-H Pre 4-16 Post 4-17 SA1-2-H Pre 4-16 Post 4-17 SA1-3-H Pre 4-16 Post 4-17 SAI-4-H Pre 4-16 Post 4-17 SAI-5-H Pre 4-16 Post 4-17 SA1-6-H Pre 4-16 Post 4-17 SAI-7-H Pre 4-16 Post 4. 17 SAI-8-L 4-18 SAM 1-3 4-18 SAI-12-H Pre 4-16 Post 4-17 SA2-1-L 4-18 SA2-2-L 4-18 SA2-4-L 4-18 SA3-4-H Pre 4-16 Post 4-17 SA3-11-3 SA4-5-L SA5-4-4 SA5-5-4 Frac Tank Frac Tank Filter 4-19 4-19 4-19 4-19 4-20 4-20 52 57 42 -38 2.9 27 -2 1 76 86 96 96 47 18 94 12 46 -1 1 15 ± ± ± ± ± ± ± ± ± ± ± ± ± ± ± ± ± ± 5 3"' (8 6) -95 53 -101 5.3(1) (8 6) 11 -47 00 85 -63 179 115 55 5 5(" (9 0) 46 80 102 4 4"' (7 5) 5 3(" (8 6) -12 -29 5 3"' (8 6) 4 5"' (7 6) 5 4"' (9 0) SO (80) 6212 5002 851 721 422 246 46 -59 164 123 46 (73) 46 (73) -87 -59 48 (79) 55 (90) -47 -105 -86 -160 53 (84) 46 (72) 47 49"' 50 6 1 (7 7) 84 (81) 88 (78) ± 179"' (298) ± 180<" (298) ± 179"' (298) ± |81(1) (298) ± 180"' (298) ± 181"' (298) ± 168"' (276) ± 166"' (276) ± 171"' (276) ± 169"' (276) ± 168"' (276) ± 168"' (276) ± 169"' (276) ± 169"' (276) ± I67"> (276) ± I67"> (276) ± 202 (170) ± 187 (170) ± 121 (170) ± 232 (361) ± 227 (361) ± 224"' (361) ± 220"' (361) ± 219"' (361) ± 222'" (361) ± 221"' (361) ± 218"' (361) ± 221"' (361) ± 218"' (361) ± 217"' (361) ± 186"' (311) ± 185"' (311) ± 189 (311) ± 137"' (223) ± 221(i) (361) Gamma ND (5 0) ND (4.9) ND (4 9) ND (4 5) ND (5 0) ND (5 0) ND (5 0) ND (4 0) ND (3.9) ND (4.9) ND (4 9) ND (4 9) ND (5 0) ND (5 0) ND (4 9) ND (4 8) ND (4 9) ND (4 4) 3 H (only) 3 H (only) 3 H (only) ND (5 0) ND (3 7) ND (4 9) ND (5 0) 3 H (only) 3 H (only) 3 H (only) 3 H (only) 3 H (only) 3 H (only) 3 II (only) 3 H (only) 3 H (only) 3 H (only) 3 H (only) 3 H (only) 3 H (only) 3 H (only) ND (5 0) ND (5 0) 3 H (only) 3 H (only) ND (4 2) ND (4.1) ND Not sampled 3 11 (only) 3 H (only) ND ND ND ND ND suspended ND (44) (49) (16) (4.6) (49) (Nol Required) (a> Indicates results are less than MDC (b) No gamma radionuchdes detected above MDC ND - Non-detected, MDC for gamma represents 137Cs (pCi/L) MDC - Minimum Detectable Concentration Only water niter 17 ------- Appendix C Standard Operating Procedures for the Center for Environmental Restoration, Monitoring & Emergency Response CER-203 Standard Operating Procedure for the Long-Term Hydrological Monitoring Program. Standard Operating Procedures for the Center for Radioanalysis & Quality Assurance RQA-302 Standard Operating Procedures of Gamma-Ray Detector Systems. RQA-602 Tritium Enrichment Procedure. RQA-603 Standard Operating Procedure for 89Sr and 90Sr in Water, Air Filters and Milk. RQA-604 Standard Operating Procedure of Convention Tritium in Water. RQA-606 Analysis of Plutonium, Uranium and Thorium in Environmental Samples by Alpha Spectroscopy. 18 ------- |