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MONITORING AND REPORTING PROGRAM NO.R5-2004-0028 7 MONITORING AND REPORTING PROGRAM NO.R5-2004-0028 8 NPDES NO.CA0081558 NPDES NO.CA0081558 CITY OF MANTECA,CITY OF LATHROP AND DUTRA FARMS CITY OF MANTECA,CITY OF LATHROP AND DUTRA FARMS WASTEWATER QUALITY CONTROL FACILITY WASTEWATER QUALITY CONTROL FACILITY SAN JOAQUIN COUNTY SAN JOAQUIN COUNTY THREE SPECIES CHRONIC TOXICITY MONITORING A composite sample of biosolids shall be collected in accordance with USEPA's POTW Biosolids Sampling and Analysis Guidance Document,August 1989,(or most recent edition)and tested for the Chronic toxicity monitoring shall be conducted to determine whether the effluent is contributing toxicity following constituents: to the San Joaquin River. The testing shall be conducted as specified in EPA/82I-R-02-013,Short-term Methods for Estimating the Chronic Toxicity of Effluents and Receiving Waters to Freshwater Constituent Units Sample Type Frequency Organisms,Fourth Edition,October 2002,or later amendment with Regional Board staff approval. Chronic toxicity samples shall be taken at the effluent monitoring location specified in this Monitoring Quantity Dry Tons -------- Quarterly and Reporting Program. Twenty-four hour composite samples shall be representative of the volume and Solids Content %percentage Composite Quarterly quality of the discharge. Adequate sample volumes shall be collected to provide renewal water to Disposal Location -------- -------- Quarterly complete the test in the event that the discharge is intermittent. Time of sample collection shall be Arsenic mg/kg Composite Quarterly recorded.The receiving water control shall be obtained immediately upstream of the discharge from an Cadmium mg/kg Composite Quarterly area unaffected by the discharge in the receiving waters. The sensitivity of the test organisms to a Chromium mg/kg Composite Quarterly reference toxicant shall be determined concurrently with each bioassay and reported with the test results. Copper mg/kg Composite Quarterly Both the reference toxicant and effluent test must meet all test acceptability criteria as specified in the Lead mg/kg Composite Quarterly chronic manual. If the test acceptability criteria are not achieved,then the Discharger must re-sample Mercury mg/kg Composite Quarterly and re-test within 14 days. Molybdenum mg/kg Composite Quarterly Nickel mg/kg Composite Quarterly Chronic toxicity monitoring shall include the following: Selenium mg/kg Composite Quarterly Zinc mg/kg Composite Quarterly Species: Pimephales promelas,Ceriodaphnia dubia,and Selenastrum capricornutum Oil and Grease mg/kg Composite Quarterly Nitrogen mg/kg(dry) Composite Quarterly Frequency: Quarterly Ammonia mg/kg(dry) Composite Quarterly Nitrate mg/kg(dry) Composite Quarterly Dilution Series: Total Kjeldahl Nitrogen mg/kg(dry) Composite Quarterly Fecal Coliform MPN/gram total solids Composite See Footnote 1 Dilutions(%) Controls Priority Pollutants --- Composite See Footnote 2 100 50 25 12.5 6.25 Receiving Lab The Discharger shall collect seven composite samples over a two week period each quarter, Water Water and analyze the samples for fecal coliform(report as MPN/gm total solids). Results for each •W WTP Effluent 100 50 25 12.5 6.25 0 0 sample shall be reported along with the geometric mean of the results. %Dilution Water 0 50 75 87.5 93.75 0 100 •Receiving Water 0 0 0 0 0 100 0 2 Within 90 days of the effective date of this Order,and annually thereafter,the Discharger shall submit results of chemical analysis for the priority pollutants listed in 40 CFR 122 Dilution water shall be standard laboratory control water due to intermittent receiving water Appendix D,Tables II and III(excluding total phenols). Suggested methods for analysis of toxicity. biosolids are provided in USEPA publications titled"Test Methods for Evaluating Solid Waste:Physical/Chemical Methods"and"Test Methods for Organic Chemical Analysis of Municipal and Industrial Wastewater". Other guidance is available in USEPA's POTW Biosolids Sampling and Analysis Guidance Document,August 1989(or most recent edition). Results of monitoring shall be reported in compliance with the Reporting Section. The biosolids BIOSOLIDS MONITORING monitoring report shall include a statement concerning compliance with 40 CFR Part 503 biosolids