WOONASQUATUCKET RIVER STUDY BRYANT COLLEGE ADVANCED WASTEWATER TREATMENT FACILITY AND STILLWATER, CAPRON, AND GEORCIAVILLE PONDS OCTOBER, 1974 MAY, 1975 REPORT OF DATA U.S. ENVIRONMENTAL PROTECTION AGENCY REGION I SURVEILLANCE AND ANALYSIS DIVISION NEEDHAM HEIGHTS, MASSACHUSETTS 02194 I ; I- , ,. Th ------- TABLE OF CONTENTS OVERVIEW SUMMARY CONCLUS IONS RECOMMENDATIONS APPROACH BRYANT COLLEGE AWWTF AND THE POLISHING POND Bryant College AWWTF Polishing Pond THE IMPOUNDMENTS RESULTS DISCUSSION OF RESULTS Bryant College AWWTF Polishing Pond Impoundments Water Quality Stations Sediment Stations Chemical Analyses Sediment Oxygen Demand (SOD) Biology Stations ------- LIST OF FIGURES Figure 1 Study Area Showing Sampling Stations 2 Bryant College Advanced Wastewater Treatment Facility, Smithville, Rhode Island and Polishing Pond 3 SunlIght Intensity and Dissolved Oxygen Measurements Versus Time at Station CRDOO1 4 Sunlight Intensity and Oxygen Saturation Versus Time at Station CRDOO1 5 Sunlight Intensity and Dissolved Oxygen Measurements Versus Time at Station CRDOO2 6 SunlIght Intensity and Oxygen Saturation Versus Time at Station CRDOO2 ------- LIST OF TABLES Table 1 AWWTF and Continuous Recording DO Stations, Dates Sampled, Numbers and Types of Samples Collected and Analyzing Laboratory 2 Water Quality and Polishing Pond Stations, Dates Sampled, Numbers and Types of Samples Collected and Analyzing Laboratory 3 SedIment Stations, Dates Sampled, Numbers and Types of Samples Collected and Analyzing Laboratory 4 AbbrevIations Used In the Report 5- Station Location and Description 6 Bryant College WWTF Influent and Effluent Analyses, Smithville, Rhode Island 7 Polishing Pond and Impoundment Water Quality Analyses Woonasquatucket River Study, Rhode Island 8 Chemical Sediment Analyses Woonasquatucket River Study, Rhode Island 9 Qualitative Benthic Survey ------- LIST OF APPENDIXES Appendix I NPDES Permit No. R10100285 Bryant College It State of Rhode Island Water Quality Standards ------- WOONASQUATUCKET RIVER STUDY BRYANT COLLEGE ADVANCED WASTEWATER TREATMENT FACILITY AND STILLWATER, CAPRON, AND CEORGIAVILLE PONDS TOBER, 1974 OVERVIEW During October, 1974, the United States Environmental Protection Agency (EPA) Region I, Surveillance and Analysis Divisions (S & A) personnel conducted a study of the advanced wastewater treatment facility (ANWTF) at Bryant College, Smithfield, Rhode Island, and three impoundments on the Woonasquatucket River at and below the point of discharge of the AWWTF effluent. The study area is shown in Figure 1. The purpose of the study was twofold: 1) evaluate the AWWTF in terms of fiveday biochemical oxygen demand (BOD 5 ), ammonianitrogen, and total phosphorus removal efficiencies; and 2) determine if the waters receiving the discharge from the AWWTF are being measurably affected by the discharge in terms of oxygen depletion by oxygen demanding material and nutrient enrichment from the phosphorus in the waste. SU1IMARY The AWWTF is operated in the extended aeration mode of the activated sludge process with facilities for phosphorus removal. The facility has a laboratory but does not perform all the testing normally considered routine for running an activated sludge unit. During the study, the AWWTF was experiencing operational problems, such as a t downet clarifier, heavy foaming in the aeration tanks, and no dissolved oxygen in the operating clarifiers. Nevertheless, the AWWTF ------- 2 was producing an effluent which, with the exception of total phosphorus concentrations, was well within the NPDES requirements. The small impoundment on the college property receiving the AWWTF discharge, referred to in the study as the polishing pond, was in an advanced stage of eutrophication, reflected by high DO concentrations and plankton algal count. The polishing pond was green during the study. The water quality in the Woonasquatucket River impoundments below the IIWWTF discharge does not appear to be adversley affected by the discharge. The only exception is higher phosphorus concentrations in the downstream sediments. The college is relatively new, however, and the longterm effects of this discharge, if any, cannot be predicted at this time. CONCLUSIONS 1. The AM4TF effluent (WQTTO2), with the exception of total phosphorus, is meeting NPDES permit limitations. 2. The polishing pond, if not considered a part of the AWWTF, is in an advanced stage of eutrophication. If the polishing pond is considered a part of the AWWTF, the total phosphorus limitation established in the permit is being exceeded. 3. The IiWWTF laboratory is not running routine operating analyses necessary to properly monitor and operate the activated sludge process. 4. The AWWTF was experiencing operational problems during the study such as low DO in the final clarifiers, and heavy foaming in the aeration basins. ------- 3 5. The MJWTF discharge haq no adverse effects on water quality of the Woonasquatucket River impoundments at this time. The sediments at some sampling sites below the discharge did indicate higher total phosphorus values than found in the sediment at the sampling site upstream of the discharge. 6. The college is relatively new, and the effects, if any, of long term discharge cannot be predicted from the results of this study. 7. The water .quallty of the Woonasquatucket River impoundment influenced by the AWWTF discharge meets the State of Rhode Islands Class B requirements, with the exception of total coliform concentrations. The AWWTF does not appear to be the cause of this violation as evidenced by the low counts in the AWWTF and polishing pond discharges. Also, the upstream impoundment station has total coliform counts in violation of Class B waters. RECONMENDATIONS 1. The operation of the unit process for phosphorus removal should be evaluated and steps taken to produce an effluent which meets permit conditions. Perhaps EPA, Region I, Operation and Maintenance Section personnel could offer assistance in this as well as with other operational problems, such as heavy foaming in the aeration basins, DO problems in the final clarifiers, sludge wasting practices, etc. 2. Clean up the polishing pond if it is nota part of the treatment process. ------- 4 3. A longterm monitoring program on the Woonasquatucket River impoundments with regard to phosphorus, chlorophyll a, plankton, and any other indication of eutrophication should be initiated. This study together with the relative newness of the AWWTF discharge should give us an excellent handle on any eutrophication trends directly attributable to the discharge. APPROACH The sampling was divided into two parts: 1) the AWWTF (Stations WQTTO1 and WQTTO2) and the discharge from a small natural pond (WQTEO1) which receives the A JWTF effluent. This small pond, for the sake of this report, will be referred to as a polishing pond; and 2) The receiving vaters (three impoundments known as Stiliwater, Capron, and Georgiaville Ponds). The report shall refer to these three ponds collectively as the impoundments. All samples, with the exception of those at the AWWTF were collected manually. All the composite samples collected at the AWWTF were time composited using automatic samplers. All samples, with the exception of those.taken for field measurements, such as temperature, pH, and chlorine residual, were hand delivered by field personnel to EPAs, Region I, Needham Heights Laboratory (NERL). Some of the samples were analyzed at NERL while others were shipped to EPAs Cincinnati Laboratory (NFIC). Tables 1 3 describe the analyses and analyzing laboratory. Standard EPA, Region I, chain of custody procedures were in effect at all times. ------- 5 Table 4 lists all abbreviations and/or symbols used throughout the report. BRYANT COLLEGE AWWTF AND THE POLISHING POND Bryant College AWWTF The AWWTF is designed for a 651 cmd or a 0.172 mgd hydraulic load. The process flow diagram is shown in Figure 2. The AWWTF was issued a final NPDES permit on August 20, 1974, (Permit No. RI 0100285). A copy of the issued permit is contained in Appendix I. The facility is a complete mix modification of the activated sludge process operated in the extended aeration (EA) mode. In addition, the facility used chemical coagulation with alum and flocculant aid, inclined tray settlers, and multi-media filters for phosphorus removal. The influent to and effluent from the AWWTF were sampled during the study. These locations are shown on Figures 1 and 2 and described in Table 5. During the study, EPA personnel found the plant was experiencing operational problems. Some of these were readily discernible, while others were learned from talking with the AWWTF operator. The operator supplied al1 historical, operation, and maintenance information discussed below. 1. Lack of DO in the aeration tanks. There was no measurable DO in the aeration tanks despite the recent installation of an aerated equilization basin at the headworks of the AWWTF. One reason for the lack of DO during the study was that the DO diffusers in the equilization basin had been shut do in over the weekend in an attempt to keep oil and grease from reaching the aeration ------- 6 basins. The equalization basin doubles as a grease trap and the aeration prevented proper baffling of the grease and other skimmings. The lack of oxygen and the low weekend flows which produced long detention times in the basin resulted in septic or nearly septic wastewater being pumped into the aeration tanks. Since the aeration capacity appears marginal with normal waste water, this septic waste really caused problems in the aeration tanks. 2. One of the smaller parallel treatment units was Out of order. This was caused by breakage of the sludge collection mechanism in the secondary clarifier causing sludge buildup resulting in septicity and sludge bulking. This unit was taken off line and was still not operating properly by the end of the study. 3. Excessive foaming was visible on the two larger aeration tanks, and with the exception of one day, heavy brown foam covered these tanks. Usually this type of foam indicates too long a sludge age. Increased sludge wasting is usually a stock solution to this problem. The operator indicated that sludge was not wasted regularly. Sludge is only wasted when a rising sludge blanket is visible in the final clarifier. The last wasting had been several months before our visit and was approximately 10,000 gallons. 4. High water alarms, signalling hydraulic surges, sounded several times during the study. Polishing Pond The discharge from the AWWTF enters a small pond on the college property. The discharge (Station WQTEO1) from this pond enters StiJ.lwater ------- 7 Pond and is shown on Figures 1 and 2 and described in Table 5. The polishing pond was green with phytoplankton during the entire study period. LT}IE IMPOUNDMENTS Stillwater, Capron, and Georgiaville Ponds are the downstream impoundments immediately below Stilivater Reservoir. Stiliwater Pond is approximately 1.45 .kilometers (0.9 miles) long; Capron Pond, 0.56 kilometers (0.35 miles) long; and Georgiaville Pond, 1.61 kilometers (1.0 mile) long. The discharge from the AWWTF enters Stiliwater Pond via a small tributary just downstream of the Route 104 bridge in Smithfield, Rhode Island. Water quality and Benthic samples were collected at selected stations. Figure 1 shows these stations. Table 5 describes the sampling locations. Tables 2 and 3 give the number of samples collected at each station and the type of analyses performed. The flow during the survey period as measured at the Centerdale U.S. Geological Survey Station averaged 1.05 cubic meters per second (cms) or 37.0 cubic feet per second (cfs). The seven consecutive day low flow with a recurrence interval of ten years for this gage is 0.24 cms or 8.3 cfs. This gage is approximately 4.5 kilometers (2.8 miles) below the Georgiaville Pond outlet. In addition to the water and benthic samples collected, two recording dissolved oxygen (DO) temperature meters were installed: one in Stillwater Pond at the Route 116 bridge and one in Georgiaville Pond just above the outlet. Figure 1 and Table 5 show and describe the installation locations, respectively. A recording pyrheliometer, an instrument for measuring sunlight intensity, was set up on the roof of the AWWTF Control Building to aid in interpreting the DO ------- 8 results. Theoretically, the higher the sunlight intensity, the more algal activity and, hence, the greater the DO production during daylight hours. Therefore, if algae is present in large numbers, a diurnal DO variation should occur. RESULTS Table 4 lists all abbreviations and/or symbols used in the results tables. The results of the AWWTF, polishing pond, and impoundment samplings are given in Tables 6 8. The results of the recording dissolved oxygen and pyrheilometer measurements are shown in Figures 3 6. DISCUSSION OF RESULTS Bryant College AWWTF As previously mentioned, the AWWTF appeared to be having operational problems during the study. Nevertheless, the results of the effluent samples analyses showed a discharge with an average BOD 5 of less that 5 mg/i and total suspended solids (nonfilterable residue) of 18 mg/i. These values are well within the maximum day permit limitations of 25 mg/i. The BOD 5 and total suspended solids removal efficiency through the AWWTF during the survey averaged better than 97 percent and 98 percent, respectively. The influent total suspended solids concentrations varied greatly during the survey: 1800 mg/i, 270 mg/i, and 2300 mg/i. There are several possible explanations for this: 1. Collection of a homogeneous sample for analysis. This was compounded by the fact that the influent samples had a great deal of floating solids. ------- 9 2. The sampling station was immediately down line from the comminuter. 3. Backwash from the phosphorus removal unit processes was returned into the waste stream just prior to the comminuter. The effluent pH was within the permit limitations. Chlorine residual, using the amperometric titration technique, varied from a high of 3.1 mg/l to a low of 1 54 mg/i. The large variance in residual concentrations is the result of decreasing the chlorine dosage after EPA field personnel recorded a high of 3.1 ing/l on the first day. The high average effluent chlorine residual of 2.0 mg/i was reflected by the low coliform counts found. The coliform counts were well below the permitted values of 400 fecal coliform per 100 ml. TKN decreased as it passed through the AWWTF. Nitrite nitrate nitrogen increased while ammonia nitrogen remained fairly constant. A portion of the AWWTF was designed specifically to remove phosphorus by the use of chemical coagulation, settling, and filtration. The phosphorus removal efficiency averaged 47 percent throughout the duration of the study. Also, the concentrations of phosphorus discharged are all in violation of the permit limitation of 1.0 mg/i. Part of the phosphorus problem could be attributable to the operation of the phosphorus removal unit operation. The operation, as related to S & A personnel, is described below: 1. A five percent alum solution is dosed into the secondary clarifier effluent to coagulate and settle out phosphorus. The usual dosage is about ten pounds of alum into an average flow of 0.18 cubic feet per second, cfs, 0.125 mgd. The phosphorus removal efficiency to meet the 1.0 mg/i permit limitation should be around 85 to 90 ------- 10 percent. EPAs process design manual for phosphorus (P) removal suggests an alum to phosphorus weight ratio of 16:1 and 19:1, respectively. Thus, to achieve 85 percent P removal from a wastewater containing 7.5 mg/i P, the alum dosage needed would be (16) (7.5) 120 mg/i or 1718 kilograms per million liters (1000 pounds per million gallons). With an average flow of 0.18 cfs (0.12 mgd), the Total P quantity should be 54.4 kilograms (120 pounds) per day. At a 90 percent removal rate, the total daily amount of alum added should be 64.4 kilograms (142 pounds). Those are theoretical dosages, but they seem to indicate the actual dosage at the AWWTF might be inadequate for the required removal efficiencies. There is presently no pH control for optimum alum removal. 2. The operation described for backwashing the multimedia filters and settling tanks used for phosphorus removal consists of sending the backwashings to a chamber from where it is pumped back to the head of the plant. This, combined with no regular sludge wasting, could be a major reason for poor phosphorus removal efficiencies; i.e. the phosphorus is settled out and then put back into the system. This could lead to a phosphorus build up in the system. Polishing Pond The polishing pond is not a designed part of the AWWTF. During the survey period, this pond was green in color, indicating excessive algal growth due to high nutrient concentrations (Total P and N) ------- 11 being discharged into it via the AWWTF effluent. The pond effluent analyses (WQTEO1) reflect this highly eutrophic state with a plankton algal count of 313,600 per milliliter of sample and chlorophyll a concentration of 48.9...qg/l. This condition easily fits Shindlers description of an eutrophic lake of algal blooms with more than 30 mg of chlorophyll a per liter) In addition to the high plankton count and chlorophyll a concentration, the average total phosphorus and various forms of nitrogen concentrations were very high. All the above, plankton, chlorophyll a, total phosphorus, and nitrogen concentrations show that the polishing pond is in a highly eutrophic state, with the AWWTF being responsible. The BOD 5 at this station was low as is the BOD 5 in the AWWTF effluent (less than 5 mg/i). The dissolved oxygen concentrations were extremely high (12.1 14.4 mg/i) indicating supersaturated conditions due to massive DO production. The coliform counts were also very low and pose no health problems. It should be noted that a chlorine residual was present in all the grab samples from this station and varied from 2.0 to 2.8 mg/i. This is high for a WWTF effluent let alone a polishing pond discharge. This high chlorine residual did not appear to adversely affect the phytoplankton in the pond as evidenced by the very high plankton count. There were no traces of chlorine in the Woonasquatucket River (Station WQTEO3) immediately below its confluence with the polishing pond effluent. 1 D. V. Shindler, Eutrophication and Recovery in Experiment Lakes Implications for Lake Management, Science , Volume 184, May 24, 1974, Pages 897 899. ------- 12 Impoundments Water Quality Stations The water quality of the downstream water quality stations (WQTEO3 WQTEO7) does not measurably vary from the upstream or control station (WQTEO2). The terms downstream and upstream refer to the station positions relative to the confluence of the tributary carrying the AWWTF effluent with the Woonasquatucket River in Stillwater Pond. The BOD 5 , DO, and pH data from all impoundment stations present a picture of good water quality, easily within the State Class B water quality limitations. See Appendix II. The total coliform counts at all stations below the waste confluence are higher than the 1000 per 100 milliliters the Class B criteria call for. This limitation was also exceeded at the upstream station (WQTEO2). The polishing pond discharge (WQTEO1) did not violate this colifonn standard, and due to the high chlorine residual in the polishing pond effluent after growth of coliforms does not seem feasible. Thus, it seems unlikely the high coliform counts can be attributed to the college AWWTF. The continuous dissolved oxygen (DO) meters showed a small diurnal variation at Station CRDOO1 and a larger one at Station CRDOO2. See Figures 3 6. These diurnal variations indicate algae are present in significant numbers at both stations. This is borne Out by noting the plankton algal count at the stations nearest the DO monitors. Station WQTEO3, nearest CRDOO1, showed a count of 2500 per milliliter, and Station WQTEO6, nearest CRDOO2, had a count of 2090 per milliliter. The high concentrations of total phosphorus and various nitrogen forms, NH 3 , NO 2 + NO 3 , TKN (hereafter referred to as N) in the polishing ------- 13 pond effluent have no measurable effect on the concentration of these nutrients in the downstream impoundment stations when compared to the upstream concentrations. The total phosphorus concentration of the upstream station (WQTEO2) and two downstream stations (WQTEO4 and WQTEO7) does exceed 0.05 mg/i in one of the three samples collected at each station. A total phosphorus concentration above 0.05 mg/i is generally considered an amount having the potential to accelerate the natural life cycle of a body of water or eutrophication. Some states, such as Massachusetts, limits total phosphate to 0.05 rng/l as P in Class B waters. Rhode Island, however, has no limitation on total phosphorus. The plankton algal count and the chlorophyll a concentration do not show any marked difference between the control and downstream stations. The algal counts, with the exception of these at Station WQTEO7, were all above 2,000 per milleliter. The chlorophyll a concentrations in the impoundments, ranging from 3.64 to 6.08 micrograms per liter (-4g11), rose steadily as you preceeded downstream with the exception of a decrease at Station WQTEO6 which is in a deadended portion of Ceorgiaville Pond. Sediment Stations Chemical Analyses The downstream impoundment sediment stations show no significant difference in the chemical constituents from the upstream sediment station. The first station below the discharge (WSOO2) shows a marked decrease from the upstream control station (WSOO1). After this initial decrease, the sediment total phosphorus concentrations increase by approximately 100 percent over the upstream control station. The literature is divided as ------- 14 to the effect, if any, of sediment phosphorus on the quality of the overlying water. Thus, no conclusions regarding the problem can be made at this time. Sediment Oxygen Demand (SOD ) EPAs Region I biology personnel collected three sediment samples from the study area for determining the SOD. These stations are shown and described in Figure 1 and Table 5, respectively. The apparatus used was a bench model benthic respirometer. The following equation was used to determine the SOD measured in grams oxygen per square meter per day (gmO2/m 2 /day): SOD (gins O 2 /m 2 /day) = ( Oi0 7 Where: Oi Initial DO (mg/i) Of = Final DO (mg/i) V Volume of confined water (in 3 ) Sa Surface area of the sediment (m 2 ) t = Time in days The data listed in Table 8 show that the sediments had low SOD values representative of sediments not subjected to any demonstrable untreated domestic of industrial waste accumulations. No attempt was made to determine the areal extent of these sediments. Biology Stations Table 9 lists the organisms found in the sediments at four locations. These locations are shown in Figure 1 and described it Table 5. ------- 15 Shallow fast flowing water over rubble (2 1/2 10 in diameter) downstream of Stiliwater Pond Dam (Station WSOO2) and Capron Pond Dam (Station WSOO3) supported several major taxonomic groups including insects, planarians, molluscs, crustaceans, coelenterates, porif era, and bryozoans. The dominant specie at these two stations was the caddisfly larvae, Hydropsyche simulans , an insect that is sensitive to pollution. Ten of the twelve animals collected at Station WS002 are classified as inhabitants of environments of intermediate water quality. Only one pollution tolerant snail, Physa integra , was collected compared to hundreds of dominant clean water caddisfly larvae indicating water of good quality at this station. Eight of the nine bottomdwellers comprising the benthic community of Station WSO3B are indicators of intermediate water quality. The dominant pollution sensitive caddisfly larvae, Hydropsyche simulans , however, indicates water of good biological quality at this station. Station WSOO4 located at the inlet to Georgiaville Pond was shallow with slow water velocity, and the rubble was overlaid with an accumulation of wood, sticks, and other undecayed coarse plant material. Nine of ten benthos living on this substrate (Station WS004) are classified as inter- mediate water quality inhabitants and the dominant form was a crustacean, the sowbug, Asellus militaris . A single specimen of the sensitive water mite was collected at this station of fair water quality. A Petersondredge grab sample of the bottom sediment of Georgiaville Pond (Station WSO4B) consisted of black muck with no detectable odor of decomposition and a low sediment oxygen demand rate of 0.61 grams 0 2 /square meter/day. This finely divided organic matter, completely decomposed and ------- 16 nutrient deficient, supported a few aquatic earthworms, Lumbricus variegatus , and midgefly larvae, Chironomous sp . The low SOD rate and low diversity and paucity of numbers of invertebrates indicate nutrient deficient sediments and little fertilization from overlying waters. One might question the conclusion concerning nutrient deficient sediments when the Ceorgiaville sediments had the highest average total phosphorus concentrations of the sediments sampled. The limiting nutrient in these sediments appears to be other than phosphorus or nitrogen. This could explain the lack of organisms with relatively high total P values. The overlying waters had low ammonia nitrogen concentrations and, with the exception of one value, had phosphorus concentrations below 0.05 mg/i. This is the rule of thumb concentration which, if in excess of, could contribute to eutrophication. Chlorophyll a values were also low (4.86 mg/l average). ------- -p a JIGURE 1 - STUDY AREA SHOWING SAMPLING STATIONS WQTE Water Quality Stations WO TT Wastewater Stations WSOO Sediment Stations CRDO Continuous Recording D.O. Stations L i , Cim I TEO6 , ------- lnflusnt S S . I s s I s e WQTTO1 __________________ I FiComiriutor i/I Crease I Equiti atton Chamber (Aerated) U a WQTEO1 Potishir g f FIGURE 2 Pond > to.! Stiliwater Pond Bryant College Advanced Wastewater Treatment Facility, Smithville, Rhode Island and Polishing Pond I ------- c j & 0. C) IJO (I .:. light In tens Tgr . ty s ar -Ti FIGUR E Diss rneat - 3H lvιd -ta-ti.o 1 L I - .-,-t-, . .-. .-,. I Sun )xygen rnr fl Nea u Ii rement El ) H illi : .,!! i . .J, ,. I; .ri1::; I, HIH. 1. I :: H H III. , H .H , HI. H HHTIH HI I;H:H i;./ . . . . .jHLIIIII THI .i lI..I . I I IH I II I I H .111 HH HIl l . HH IIIHH: ::I II. H I, -- - , Hi;i: H HI . :. . I I . ., .. . : 1( C I. ;_I_ \ V - - I 1 : 11,1 :1.1 HI HI HI IT :HHIHI HI H TTH: . iIHI:1F:T:.:HI T I HIHIH II HI T ! HIIHI : 1100 1400 1700 2000 2300 0200 0500 0800 1 00 1400 1700 200( 2300 0200 0500 0800 10/02/74 I. . . - 10VO3/74 I j ibjot / __________ 1 1 (hrs) . . . ------- 2000 2300 0200 0500 0800 1 ..: i j 10/04/74 I f r1. T f I Sun1i it 1n ensit3 IF]GUR and c xy en t- - -- , .( H Saturation 1\ Dr Afl1 Time ersus - 4- u0. 10( 8( 6 4 2 . . . . . . . . , . . I I I . II 14- - H H ..HH .. . ; IIII.IIHI: Hf. H, . ,, , 1 ..T ._ .. , . . . 1 l\ _ y . . . . . . , it , i , I I , I /1 1/ \ / I . . I H ... \\\ I I 4 -I H I II ; i i .. - . . . // -- \__ _ \ , , I I L- - LH - It .1 . 11 1 1100 1400 10/02/74 ii00 2000 23 0 02OO - 050( ill, 08 1 [ IME .(1 L. : I I II 0 1100 1400 1700 )i0 .3 iI7 td irs.) j . 1 __________ ------- H 1 - H+- FIG4 5 :S n1igh1 Inten sity . Versu 1jth δ rid. Di so1v .c Oxyge Stat5onCRt OO2 urerner ts Th-r - - 1± 1 21.2 4J ic L - - H .111:, .::j.. 1 7T__ _ 7__ _ iL_ :_: . . H H / - I II I / I I III IJI . I . . . . . F i - :1100 1400 1700 2000 2300 0200 0500 0800 1100 1400 1700 2000 2300 0200 0500 0800 10/02/74 . . . 10/03/74 . - - - 10/04/74 . ii II, I .1 1 1 1 tH I - .- S-,. / - ------- - - -H-- Stin1ighi TIG1J RE T Intensity nd Oxygen t ti n CR OO2 - -____ S turat1 onVe I I susTitne rr -1 I - L-_ . - . :11 - . :.. \ H -__ H -J ( / \ // 11 \\ / 1 . N1______ 7 ____T j 1.2 E C-) 1. U 0 . 8 3)0.4 4J F - i 0.2 lao- 60 4( 20 a H / /N A 2 -I H / 1100 1400 1700 2000 2300 0200 0500 0800 1100 1400 1700 2000 - 2300 0200 0500 0800 I I 1*Q3114 I - -- - - . . -i - - . 1 /04/7 - TIME (hrs.) ------- TABLE 1 AWWTF AND CONTINUOUS RECORDING DO STATIONS, DATES SAMPLED, NUMBERS AND TYPES OF SAMPLES COLLECTED AND ANALYZING LABORATORY Number of Samples Collected Grab/Composite Analyzing Facility Field NERL NFIC Station Total Number Date Temp pH DO Cl BOD Residue P Bacti NH N NO2NO 3 TKN WQTTO1 10/01/74 0 0 0 0 0 0 2/0 0 0 0 10/02/74 0 0 0 0/1 0/1 0/1 2/0 0/1 O/l 0/1 10/03/74 1/0 0 0 0/1 0/1 0/1 2/0 0/1 0/1 0/1 10/04/74 1/0 0 0 0/1 0/1 0/1 0 0 0 0 WQTTO2 10/01/74 0 0 0 0 0 0 2/0 0 0 0 10/02/74 0 0 0/1 0/1 0/1 0/1 2/0 0/1 0/1 0/1 10/03/74 1/0 0 0/1 0/1 0/1 0/1 2/0 0/1 0/1 0/1 10/04/74 1/0 0 0/1 0/1 0/1 0/1 0 0 0 0/1 CRDOO1 10/02/74 continuous continuous 10/03/74 continuous continuous 10/04/74 continuous continuous CRDOO2 10/02/74 continuous continuous 10/03/74 continuous continuous 10/04/74 continuous continuous ------- TABLE 2 WATER QUALITY AND POLISHING POND STATIONS, DATES SAMPLED, NUMBERS AND TYPES OF SAMPLES COLLECTED AND ANALYZING LABORATORY Number of Samples Collected Grab/Composite Analyzing Facility Field NERL NFIC Station Chlor Total Number Date Temp pH DO Cl BOD Residue Plankton a P Bacti N}1 3 N NO 2 NO3 WQTEO1 10/01/74 2/0 1/0 2/0 2/0 0/1 0 1/0 1/0 0/1 2/0 0/1 0/1 0/1 10/02/74 2/0 0/0 2/0 2/0 0/1 0 0 0 0/1 2/0 0/1 0/1 0/1 10/03/74 2/0 1/0 2/0 2/0 0/1 0 0 0 O/l 2/0 0/1 O/l 0/1 WQTEO2 10/01/74 2/0 2/0 2/0 0 0/1 0 1/0 1/0 0/1 2/0 0/1 0/1 0/1 10/02/74 2/0 2/0 2/0 0 0/1 0 0 0 0/1 2/0 0/1 0/1 0/1 10/03/74 2/0 2/0 2/0 0 0/1 0 0 0 0/1 2/0 0/1 0/1 0/1 WQTEO3 10/01/74 1/0 1/0 2/0 0 0/1 0 1/0 1/0 0/1 2/0 0/1 0/1 0/1 10/02174 2/0 2/0 2/0 1/0 0/1 0 0 0 0/1 2/0 0/1 0/1 0/1 10/03/74 2/0 2/0 2/0 i/O O/l 0 0 0 0/1 2/0 0/1 0/1 0/1 WQTEO4 10/01/74 2/0 2/0 2/0 0 0/1 0 1/0 1/0 0/1 2/0 0/1 0/1 0/1 10/02/74 2/0 2/0 2/0 0 0/1 0 0 0 0/1 2/0 0/1 0/1 0/1 10/03/74 2/0 2/0 2/0 0 0/1 0 0 0 0/1 2/0 0/1 0/1 0/1 WQTEO5 10/01/74 2/0 2/0 2/0 0 0/1 0 1/0 i/O 0/1 2/0 0/1 0/1 0/1 10/02/74 2/0 2/0 2/0 0 0/1 0 0 0 0/1 2/0 0/1 0/1 0/1 10/03/74 2/0 2/0 2/0 0 0/1 0 0 0 0/1 2/0 0/1 0/1 0/1 WQTEO6 10/01/74 2/0 2/0 2/0 0 0/1 0 1/0 1/0 0/1 2/0 0/1 0/1 0/1 10/02/74 2/0 2/0 2/0 0 0/1 0 0 0 0/1 2/0 0/1 0/1 0/1 10/03/74 2/0 2/0 2/0 0 0/1 0 0 0 0/1 2/0 0/1 0/1 0/1 WQTEO7 10/01/74 2/0 2/0 2/0 0 0/1 0 1/0 1/0 0/1 2/0 0/1 0/1 0/1 10/02/74 2/0 2/0 2/0 0 0/1 0 0 0 0/1 2/0 0/1 0/1 0/1 10/03/74 2/0 2/0 2/0 0 0/1 0 0 0 0/1 2/0 0/1 0/1 ------- TABLE 3 SEDIMENT STATIONS, DATES SAMPLED, NUMBERS AND TYPES OF SAMPLES COLLECTED AND ANALYZING LABORATORY Number of Grab Samples Analyzed at NERL Percent Total Station Date Moisture P TKN SOD Metals Biology WSOO1 10/23/74 1 1 1 0 1 0 WSOO2 10/23/74 1 1 1 1 1 WSOO3 10/23/74 1 1 1 1 1 1 WSOO4 10/24/74 1 1 1 1 1 1 WSOO4B 10/24/74 0 0 0 0 0 1 W 5005 10/24/74 1 1 1 0 1 0 ------- TABLE 4 ABBREVIATIONS USED IN THE REPORT Abbreviation Temp pH DO Couip Grab MGD CHS CMD BOD BOD 5 Total P NH 3 N0 2 -N0 3 TKN TKN (dry weight) Residue Nonfilterable Filterable Description temperature of sample field pH dissolved oxygen composite sample grab sample million gallons per day cubic meters per second cubic meters per day biochemical oxygen demand incubated at 20°C fiveday. BOD total phosphorus in water total phosphorus in sediments on a wet weight basis ammonia nitrogen combined nitritenitrate nitrogen total Kjeldahl nitrogen amount of TKN present in the sediment on dry weight basis solids suspended solids dissolved solids Units of Measure degrees centigrade (°C) stand.ard units (SU) milligrams per liter (mg/i) million gallons per day cubic meters per second cubic meters per day mg/i mg/i mg/i as phosphorus microgram per gram (mg/gm) mg/i as nitrogen (N) mg/i as N mg/i as N milligram per kilogram mg/i mg/i mg/i (mgd) (cms) (cmd) ------- TABLE 4 (CONT.) ABBREVIATIONS USED IN THE REPORT Abbreviation Description Units of Measure Total total solids mg/i Volatile organic solids (loss on ignition at 6000C) mg/i Fixed inorganic solids (remaining mg/i after ignition at 600°C) Metals total amount of a particular parts per million (ppm) metal present by weight Cr chromium ppm Ni nickle ppm Fe iron ppm Cu copper ppm Pb lead ppm Zn zinc ppm Sn tin ppm Coliform Bacteria coliform bacteria number per one hundred milliliters of sample Total total coliform bacteria number per one hundred milliliters of sample Fecal fecai coliform bacteria number per one hundred milliliters of sample Sunlight intensity sunlight intensity gram calories per square centimeter per minute (gmcal/cm 2 /min) Cl total chlorine residual mg/i Plankton total number of Plankton number per ml algal present Chior a chlorophyll a micrograms per liter (4lg/l) ------- TABLE 4 (CONT.) ABBREVIATIONS USED IN THE REPORT Abbreviation Description Units of Measure Percent moisture percent by weight of percent (%) moisture present In tne sedIment sample SOD sediment oxygen demand grams of oxygen utilized per square meter of sediment surface per day (grams 02/m 2 /day) 9999 composite sample Symbols preceding a report value demote the following: 3 = estimated, value not accurate K = less than L = greater thani R = results not reported = no sample collected S not present in measureable amounts NERL EPAs Region I Laboratory at Needham, Massachusetts NFIC EPAs National Field Investigations Center, Cincinnati, Ohio ------- River Kilometer (mile) 18.660.92+ (11.590.57+) 18.660.92+ (11.590.57+) 18.28 (11.4) 15.09 (9.38) 18.80 (11.65) 17.47 (10.86) 16.83 (10.46) 16.44 (10.22) 15.96 (9.92) 15.06 (9.36) TABLE 5 STATION LOCATION AND DESCRIPTION Station WQTTO1 WQTTO2 CRDOO1 CRDOO2 wS001 WSOO2 WSOO3 WSOO4 WSOO4B WSOO5 Location Latitude Longitude o o - Description 41 55 04 71 32 30 Influent to the Bryant College Advanced Wastewater .Treatment Facility (AWWTF), Smithfield, Rhode Island. 41 55 04 71 32 26 Effluent, after chlorination, from the Bryant College AWWTF, Smithfield, Rhode Island. 41 54 30 71 32 05 Continuous recording dissolved oxygen station at the Route 116 Bridge over Stiliwater Pond, Smithfield, Rhode Island. Same location as WQTEO3. 41 53 38 71 30 28 Continuous recording dissolved oxygen station just above the Georgiaville Pond outlet (WQTEO6), Smithfield, Rhode Island. 41 54 31 71 32 30 Sediment station in Stiliwater Pond upstream of the unnamed tributary carrying the AWWTF effluent and downstream of the Stillwater Reservoir outlet, Smithfield, Rhode Island. 41 54 26 71 30 30 Sediment station immediately below the outlet from Stiliwater Pond, Smithfield, Rhode Island. 41 54 10 71 31 19 Sediment station immediately below the outlet from Capron Pond, Smithfield, Rhode Island. 41 54 05 71 31 05 Sediment station in Georgiaville Pond, Smithfield, Rhode Island, approximately 1.43 kilometers northnorthwest of the outlet. 41 53 50 71 30 57 Sediment station in Georgiaville Pond, Smithfield, Rhode Island, approximately 0.95 kilometers northnorthwest of the outlet. 41. 53 35 71 30 29 Sediment station in Gιorgiaville Pond, Smithfield, Rhode Island. approximately 0.05 kilometers south.southwest of the outlet ------- TABLE 5 (CONT.) STATION LOCATION AND DESCRIPTION River Location Kilometer Latitude Longitude Station ( mile ) O 0 Description WQTEO1 18.660.92 41 55 01 71 32 36 Outlet from the polishing pond, Bryant College, S iithfield, (11.590.57) Rhode Island. UQTEO2 18.66 41 54 32 71 32 27 Upstream side of Route 104 Bridge, Smithfield, Rhode Island. (11.60) Station is upstream of the tributary carrying the Bryant College AWWTF discharge. WQTEO3 18.28 41 54 30 71 32 05 Upstream side of the Route 116 Bridge, Smithfield, Rhode Island. (11.36) This is the same location as Station CRDOO1,. WQTEO4 17.38 41 54 27 71 31 35 Immediately behind the dam at the outlet from Stiliwater Pond, (10.80) Smithfield, Rhode Island. WQTEO5 16.73 41 54 10 71 31 21 Immediately behind the dam at the outlet from Capron Pond, (10.40) Smithfield, Rhode Island. WQTEO6 15.010.35 41 53 26 71 30 33 The southeast end of Georgiaville Pond, approximately 0.25 (9.300.25) kilometers southsoutheast of the Georgiaville Pond outlet, Smithfield, Rhode Island. WQTEO7 15.01 41 53 35 71 30 26 Immediately behind the dam at the outlet from Georgiaville Pond, (9.33) Smithfield, Rhode Island. ------- TABLE 6 BRYANT COLLEGE WWTF INFLUENT AND EFFLUENT ANALYSES, SMITHVILLE, RHODE ISLAND Flow During Sample Composite Field Chlorine Residue (mg/i) Collection cmd pH Residual Nonfilterabie Filterable Station Date Time ( nzgd) ( SU) ( mg/i) Total Volatile Fixed Total Volatile Fixed WQTTO1 10/01/74 0945 1145 10/02/74 0945 1145 9999 502 1800 216 (0.1325) 10/03/74 0945 1145 6.9 270 240 9999 453 (0.1197) lq/04/74 9999 408 8.4 2300 2200 71 260 90 170 (0. 1077) WQTTO2 10/01/74 0945 1145 10/02/74 0945 1145 9999 502 3.1 14 194 (0. 1325) 10/03/74 0945 1145 6.7 9999 453 1,6 22 197 (0.1197) 10/04/74 9999 408 6.9 1.4 17 14 3 210 47 170 (0.1077) ------- TABLE 6 (CONT.) BRYANT COLLEGE WWTF INFLUENT AND EFFLUENT ANAL, SMITHVILLE, R}IODE ISLAND BOD (mg/i) NH3N ( mg / 1 ) Station WQTTO1 WQTTO2 N02+N0 3 -N (mg / 1) TKN ( mg/i ) 130 15 0.27 280 45 28 lO/04/74 10/01/74 0.40 300 51 Sample Collection Date Time Total Phosphorus (mg/i) Coiiforu - Counts Total Bacteria Per 100 ml Fecal_ 10/01/74 0945 1145 49,000,000 41,000,000 2;100,000 2,300,000 10/02/74 0945 1145 9999 5.07 32,000,000 63,000,000 4,200,000 3,800,000 10/03/74 0945 1145 9999 7.79 28,000,000 18,000,000 500,000 650,000 9999 7.93 0945 1145 1,900 1Q00 1Q00 1Q00 10/02/74 0945 1145 9999 4.8 4.00 300 1 (100 1(10 1(10 10/03/74 10/04/74 0945 1145 9999 9999 . R KS - 5.1 4.21 275 200 1(100 1(10 1(10 1 (5 20 18 16 20 ------- TABLE 7 POT.TS)I1N( POND ANI) LHPOUNDMF.NT IATER QUALITY ANA1.YSE UOONASOUATUCKET R1vI:R S l tIDY, RHODE ISI.AND Col [ form Total Nitrogen Bacteria Plankton Sample Field Field DOD P TKN Nil 3 N0 2 N0 3 Count Per Chlorine Algal Chlorophyll Collection Temp p 11 flO 5Day (mg/i (mg/i (mg/i (mg/i 100 ml Residual Count a Station Date Tine ( SU) ( mg/i) ( mg/i) as P) as N) as N) as N) Total Fecal ( mg/i) per ml ( .i 7i ) WQTEO1 10/01/74 1015 16 6.8 12.3 1(100 Fl00 2.1 313,600 48.90 1205 17 12.6 1(100 1(100 2.0 9999 2 2.57 14 10 4.0 10/02/74 1000 17 14.4 100 1(10 2.8 1200 17 14.3 100 1(10 2.8 9999 3 2.28 15 10 3.8 10/03/74 1000 14 12.1 1(100 1(10 2.2 1200 16 6.9 13.2 1(100 1(10 2.1 9999 3 4.03 15 14 4.5 WQTEO2 10/01/74 0820 17 7.5 8.8 6600 1(100 4,250 4.66 1125 18 7.7 9.0 4900 1(1.00 9999 3 1(0.01 0.8 0.02 0.05 -- 10/02/74 0825 17 7.0 8.7 5800 1(10 1010 17 7.2 9.0 2700 1(10 9999 3 0.17 0.7 0.06 0.07 - 10/03/74 0810 16 7.5 9.0 3600 30 0935 15 7.6 9.7 3300 10 9999 2 0.02 0.6 0.04 0.05 - WQTEO3 10/01/74 0900 17 7.2 8.2 5000 1 (100 2,500 5.63. 1145 ft ft 8.9 5400 1(100 9999 - 3 0.02 0.6 0.06 0.10 10/02/74 0840 16 7.6 8.9 6100 1 .0 1020 17 7.1 8.6 3203 10 9999 2 0.04 0.6 0.04 0.07 0.0 10/03/74 0820 15 7.6 8.7 5100 10 0945 14 8.1 9.0 4800 30 9999 2 0.03 0.6 0.06 0.06 ------- TABLE 7 (C0NT. WATER OUALITY ANALYSES WOONASQLJATUCKET RIVER STUDY, RHODE ISLAND Coliform Bacteria Plankton Sample Field Field DOD Total Count Per Algal Chlorophyll Collection Temp pH DO 5Day P Nitrogen 1OC ml Count a Station Date Time ( °C) ( SU) ( mg/l) ( mg/i) ( mg/i as P) TKN NH NO 2 N Total Fecal Per ml ( . ij7i ) WQTEO4 10/01/74 0935 17 6.8 8.1 - 5200 300 2260 5.98 1315 19 7.4 8.6 5300 200 9999 - 2 1 (0.01 0.7 0.70 0.03 -- 10/02/74 0900 16 6.9 8.0 5400 60 1035 17 6.4 8.2 3400 40 9999 2 0.01 0.5 0.02 0.04 10/03/74 0840 15 7.7 8.5 2900 40 1000 15 7.8 8.8 4100 Kl0 9999 2 0.21 0.6 0.02 0.05 - WQTEO5 10/01/74 1005 16 6.8 8.7 8100 1(100 3060 5.98 1330 17 7.5 8.7 7300 200 9999 2 0.01 0.5 0.03 0.06 -- 10/02/74 0920 16 7.1 8.4 8400 40 1100 17 6.2 8.7 5800 30 9999 2 1(0.01 0.5 0.04 0.05 -- 10/03/74 0850 15 7.8 8.5 1100 10 1025 15 7.5 8.4 1800 1(10 9999 2 0.01 0.8 0.03 0.04 WQTEO6 10101/74 1100 18 7.3 8.3 1800 300 2090 1410 19 7.5 8.5 1300 400 9999 1 0.02 0.7 0.08 0.07 10/02/74 0950 17 7.4 8.2 1300 100 1135 18 7.4 8.6 800 70 9999 2 1(0.01 0.6 0.06 0.08 ------- TABLE 7 (CONT. WATER OUALITY ANALYSES WOONASQUATUCKET RIVER STUDY, RHODE ISLANI1 Coliform Bacteria Plnnkton Sample Field Field BOD Total Count Per Algal Chlorophyll Collection Temp pH DO 5Day P Nitrogen 100 ml Count a Station Date Time ( °C) ( SU) ( mg/i) ( mg/i) ( mg/i as P) N11 N0 2 NO Total Fecal Per ml ( .ugT l ) UQTEO6 10/03/74 0920 16 7.8 8.8 500 40 (cont.) 1100 16 7.8 9.2 2500 40 0.01 0.7 0.06 0.07 WQTEO7 10/01/74 1030 18 7.5 8.6 _ 2100 100 1360 6.08 1345 19 7.5 8.5 700 200 9999 2 0.04 0.8 0.08 0.07 - 10/02/76 0935 17 7.2 8.2 1200 70 1120 18 7.3 8.6 1000 80 9999 2 0.16 0.6 0.06 0.07 10/03/74 0900 16 8.1 8.3 600 40 1035 16 7.3 8.9 400 10 9999 1 0.01 0.7 0.10 0.08 ------- TABLE 8 CHEMIcAL SEDIMENT ANALYSES - WOONASQUATUCKET RIVER STUDY, RHODE ISLAND Total P TKN Sample (wet (dry SOD Collection Percent weight) weight) Crams Metals (ppm) Station Date Time Moisture mg/gm mg/gm O m 2 /day Chromium Iron Nickle Copper Zinc .Tirr Lead WSOO1 10/23/74 1045 75.4 787 820 0.45 14,500 71 38 98 1300 33 WSOO2 10/23/74 1230 69.1 163 1100 0.62 0.26 20,000 9 22 235 114 77 WSOO3 10/23/74 1400 86.0 1450 1900 0 7O 0.32 22,000 19 57 299 523 77 WSOO4 10/24/74 1030 72.1 1300 940 0.61 0.27 21,000 11 25 209 23 62 WSOO5 10/24/74 1315 85.6 1810 530 0.52 22,500 11 57 260 S 106 ------- TABLE Q Woonasquatucket River, R.I. Qualitative Benthic Survey Oct. 1974 Organisms S tatioris Sensitive WSO2B WSO3B WSO4A WSO4B Caddisfly - Hydropsyche simulans x x c Water mite - Hydracarina x Intermediate Moss animalcules - Cristatella mucedo x Hydra - Hydra sp. x x P1.anarian - Planaria sp. x Clam - Sphaeriuxn sp. x x Sponge Spongi].la fragilis x Scud Hyallela azeteca x Sowbug - Asellus militaris x * Dragonfly - Leucorrhiriia sp. x Damselflies - Agrion sp. x - Chromagrion conditum x x Snails - Helisoma sp. x x Lymnaea sp. x x Ferrissia sp. x Midgefly (without gills) x x Fishfly - chauliodes sp. x Blackfly - Simulium uittatum x x Horsefly - Tabanus atratus x Beetles - Curculionidae x Dytiscidae x Haliplidae x Tolerant Aquatic earthworm - Lumbricus variegatus x Midgefly (with gills) - Chironomous sp. x Snail - Physa integra x Total Kinds 12 9 10 2 * Dominant Kind ------- APPENDIX I NPDES PERNIT. NO. R10100285 BRYANT COLLEGE U. S. ENVIRONMENThL PROTECTION AGENCY REGION I JOHN F. KENNEDY FEDERJ L BUILDING BOSTON, MASSACHUSETTS 02203 Application Number: R10100285 Name of Applicant: Bryant Co1le, e Expiration Date: January 1. 1979 AUTHORIZATION TO DI CHARCE TT 1DER THE NATIONAL POLLUTA;:T DISC !AR;E TLflIPATION SYSTEM In reference to the above application for a permit to discharge in compli- ance with the provisions of the Federal Water Pollution Control Act, as amended (hereinafter referred to as the Act), ____________________________ Bryant College (hereinafter referred to as the permittee) is authorized by the Regional Mministrator Region I, U. S. Environmental ProtectIon Agency, Boston, Massachusetts, to discharge from the B 7ant Co11 e t a. tewatpr T aa .tm rij Facility {Disch.ar e 002. ) to on unnamed tributary of t e oonascn: tucket River in accordance with the following general and special conditions: ------- APPENDIX I (CONT.) I. SPECIAL CONDITIONS Page SC 1 of A. Effluent Linits 1. Until January 1,1 9 , the permittee is authorized to discharge from discharge 001 the Br ant College Wastewater Treatment Facility to t4ie an unnamed tributary to the 1oonascuatucket River an effluent whose characteristics shall not exceed the values listed below. Discharg kg/day (lbs/day) Monthly Weekly Maximum Average Average Day ** ** Limitations (specify units) Monthly Weekly Maximum Average Average Day Biochemical Oxygen Demand, 5day, 20°C 9.7(21.2) ]2.9(2 .4) 15MG/L 2OMG/L 25MG/L Total Suspended Solids Settleable Solids a1 Coliform Bacteria Total Phosphorus 9 .. 7 j 21 .2) 129 (2 .4) 15MG,/L 20!IG/L 25MG/L 0. ]1.IL/L 0 .3ML/L 200/100?i 40O/l0O L 4OO/l0C IL 1 .0 IG/L Effluent Characteristic Flow, cu. !1/day (MCD) Biochemical Oxygen Demand, 5day, 20°C Total Suspended Solids tleable Solids Feca]. Coliform Bacteria Limitations (specify units) Nonthly Weekly Maximum Average Average Day Effluent Characteristic Flow, cu. H/day (MCD) * * 644.0(0.17) * * * * - -I -i authorized to discharge from t he an e f ucnt whose characteristics listed b .lo w. Discharc e kg/day (lbs/day) Monthl 1 y Wc ekly Maximum _______________ Average 4 jtverar. Day * & shall not exceed the values ** ** ** ** \_ :. . I ------- APPENDIX I (CONT.) Page C of a. The p11 f the cffl ent shall not be lc s than 6.0 nor greater than 9.0 at any time. b h t th . e& - C eco urv1a trs.an t i1 tev The total ch lo rifle residual of the effluent shall not result in any demonstrable harm to aquatic life or violate any water quality standard which has been or may be promulgated. Upon promulgation of any such standard, this pcrr it shall be revised or amended in accodance with such standard, and the permittee shall be so notified. c. :The effluent shall contain neither a visible oil sheen, foam, nor floating solids at any time. d. The discharge shall not cause visible discoloration of the receiving waters. e. The discharge shall not cause a violation of the water quality standards of the receiving waters. f. The monthly average concentrations of BOD and total suspended solids in the discharge shall not exceed 15 percent of the monthly avcrage concentrations of BOD and total suspended solids in he influent inco the permittccs wastcwater trcatm nt facilities. For the purposes of determining whether the permittee is in compliance with this condition, samples from the discharge and thc. influent shall be taken with appro- priate allowance for detentcon times. g. when the daily average flou for a period of l 0 days exceeds 0 percent of the per aitted flow limitation, the permittee shall sutmit to the Regional Administra- tor and the Director projected flo is and loadings. If these projected flo . -:s ar.d loadings exceed the cur- rently permitted flotzs and loadings, the permittee will subnit to the Regional Administratcr and the Director a plan insuring that additional treatment. capacity will be provided in keeping with approved water qu2lity rn ncgement plans. ------- APPENDIX I (CONT.) Monitoring and Re.porting Page SC 4 of 5 The permict e discharge (2) according to shall monitor and record the quality and quantity of 001 the Eryent Co1lec e !aot water Treatment Facility the following scnedule and other provisions: Parameter Minimum Frequency of Analysis Sample type Until Jιnuary 1, 1979 Fl nt B3D 5 TSS Settleabie Solids Fecal Coliform Continuon n d1 1 X monthly 1 X monthly 1 X daily 1 X monthly 1 X daily 1 X daily 1 X monthly Daily avg., max., m i i i . 8hour Comr,osjte 8hour Commosite Grab Grab Grab Any grab sac ple or ccw 2osite sarp]c re uircd to be taken less fre- quently thin daily sh 11 be taken d:r .r.c; the pcriod of !1onday through Friday inclusive. Eighthoir composites and grab samples shall beftaken between 6 a.m. and 6 p.ti. pH - Chlorine Residual Grab rotal Phosohorus , - b ... ,: 8hour Conoosite Sb.. . .- f - _ ) - After N - - . . r-- . , . - . % _ 4 .. ------- APPENDIX II STATE OF RHODE ISLAND WATER QUALITY STANDARDS aJ SS B Suitable for bathing, other recreational purposes, agricultural uses, industrial processes and cooling; excellent fish and wildlife habitat; good aesthetic vali ; acceptable for pi.blic water s p1y with appropriate treatnent. Standaix]s of Water Quality Item Water Quality Criteria 1. Dissolved oxygen 75% saturation, 16 hours/day 5 ugh at any tine 2. Sludge deposits-solid refuse None alla 1 zable floating solids, oils, and greasescum 3. Color and turbidity None in suth concentrations that would izrpair any usages specifically assigned to this Class 4. Coliform bacteria per 100 nil Not to exceed a nedian of 1,000 per 100 ml nor utore than 2,400 in nore than 20% of sauples collected 5. Taste and odor None in suth concentrations that would inpair any usages specifically assigned to this Class nor cause taste and odor in edible fish 6. pH 6.5 8.0 7. AllcMable tenperature increase Only sud increases that will not inpair any usages specifically assigned to this Class (See Note 7) 8. themical stit nts (See Note 5) ------- APPE&DIX It (coN :) ES : 1. These Standards do not apply to nditions brought about by natural causes. 2. Class D waters will be assigned only where a higher water use Class cannot be attained after all appropriate waste treatmant nethods are utilized. P ppropriate waste treat]rent shall be secxndary treatnent with disinfection or the equivalent. Lesser degrees of treatnent will be permitted only where it can be denxnstrated that attainnent of the specified water use class standard of qw 1i ty can be effectuated. 3. All sewage treatirent plant efflt ts shall re ive disinfection before discharge into a watercourse. 4. Any water falling bela i the standards of quality for a given Class shall be nsidered satisfactoi:y for the uses indicated for that Class. 1aters falling belc z the standards of quality for Class D shall be Class E and considered to be in a nuisan cx ndition. 5. Waters shall be free fran chemical constituents and radioactive materials in cona ntrations or cx rbinations which would be harmful to ht mian, animal, or a uatic life for the appropriate, rest sensi- tive and governing water class use. In areas where fisheries are the governing considerations and approved limits have not been established, bio-assays shall be porforired as required by the appropriate agencies. For publiα drinking water supplies the limits prescribed by the United States Pthlic Health Servica will be used where not st erseded by Irore stringent signatory State requirextents. 6. Deleted 7. The tcn erature increase shall not raise the tenperature of the recx iving waters above 68°F for waters supporting cold water fisheries and 83 0 F for waters supporting a warm water fishery. In no case shall the terrperature of the recaiving water be raised nore than 4 0 F. 8. Sludge deposits, floating solids, oils, grease and SCUITt shall not be allo.icd, exo pt for sudi small arrounts that may result fran the discharge of appropriately treated sewage or industrial waste effluents. 9 The minirrrum average daily flo i for seven consecutive days that can be expected to occur a in ten years shall be the miniitumi flo. , to which the standards apply. -17- ------- / 10. Class B and C waters shall be sibstantially free of pollutants that: a) Unduly affect the cxziposition of bottan fauna, b) Unduly affect the physical or themical nature of the bottan, C) Interfere with the propagation of fish. 11. Class A waters in use for drinking water supply may be sthject to restricted use by State and local authorities. ------- |