SITE INFORMATION AND CORRESPONDENCE_1993-2003

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MONITORING AND REPORTING PROGRAM N0. R5-2002-0213 6 U.S. DEPARTMENT OF DEFENSE DEFENSE LOGISTICS AGENCY DEFENSE DISTRIBUTION DEPOT SAN JOAQUIN SHARPE GROUNDWATER REMEDIATION SYSTEM SAN JOAQUIN COUNTY Constituents Units Station Samplina Frequency Bromacil pg/L,(ppb) R-3, R-4 Twice Annually Nitrate° mg/L, (ppm) R-3, R-4 Twice Annually Turbidity NTU R-3, R-4 Quarterly Estimate of receiving water flow,recorded for each day of sample collection. Use CA DWR gauging station at French Camp if available. 2 Field measurements. 3 At a minimum the Discharger shall comply with the Monitoring Requirements for these constituents as outlined in Section 2.3 and 2.4 of the Policy for Implementation of Toxics Standards for Inland Surface Waters,Enclosed Bays, and Estuaries of California(SIP),adopted 2 March 2000 by the State Water Resources Control Board. For each priority pollutant use an analytical method from the SIP,Appendix 4 with a Minimum Level (ML) below all applicable pollutant criteria. In accordance with Section 2.4.2 of the SIP,the Discharger is to instruct the laboratory analyzing samples for priority pollutants to establish calibration standards so that the ML is the lowest calibration standard. At no time is the Discharger to use analytical data derived from extrapolation beyond the lowest point of the calibration curve. Report all peaks identified by the EPA test methods. Samples shall be collected weekly during periods of no flaw in the SSJID Canal. 5 Concurrent with metals monitoring. 6 Use clean sample collection techniques and EPA Test Method 1669 or 1631,or]ater amendment for Mercury. 7 Use EPA Test Method 7742, or later amendment for Selenium. 9 Dissolved Arsenic,Barium,Cyanide, Iron,Manganese, Silver,Zinc. 9 Total Nitrate(as N). - In conducting the receiving water sampling, a log shall be kept of the receiving water conditions throughout the reach bounded by Stations R-3 and R-4. Attention shall be given to the presence of. a. Floating or suspended matter e. Visible films, sheens or coatings b. Discoloration f. Fungi, slimes, or objectionable growths c. Bottom deposits g. Potential nuisance conditions d. Aquatic life Notes on receiving water conditions shall be summarized in the monitoring reports. THREE SPECIES CHRONIC TOXICITY MONITORING Chronic toxicity monitoring shall be conducted to determine whether the effluent is contributing toxicity to the South San Joaquin Irrigation District (SSJID) Canal. The testing shall be conducted as specified in EPA 600/4-91/002, or later amendment. Chronic toxicity samples shall be collected from the final GWTP's combined effluent discharge prior to its entering the SSJID Canal. Grab samples shall be representative of the volume and quality of the discharge. Time of collection samples shall be recorded.