SITE INFORMATION AND CORRESPONDENCE_1993-2003

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MONITORING AND REPORTING PROGRAM -2- DEPARTMENT OF DEFENSE, DEFENSE LOGISTICS AGENCY DEFENSE DISTRIBUTION REGION WEST, SHARPE LOCATION INTERIM GROUND WATER CLEANUP SYSTEM SAN JOAQUIN COUNTY Sampling Constituents Method' Units Type of Sample Frequency Iron 200.7 µg11 24-hour composite Monthly Lead 239.290 µg11 24-hour composite Monthly Mercury 245.1 µg11 24-hour composite Monthly Nickel 200.7 /41 24-hour composite Monthly Selenium 270.3 µgQ 24-hour composite Monthly Silver 200.7 µg11 24-hour composite Monthly Thallium 279.2 4g/1 24-hour composite Monthly Vanadium 286.2 µg/1 24-hour composite Monthly Zinc 200.7 µg/1 24-hour composite Monthly Total Petroleum 3050 GCFlD µg/1 24-hour composite Monthly Hydrocarbons Total Hardness 130.2 mg/1 as 24-hour composite Monthly CaCO, Specific 120.1 µmhos/cm 24-hour composite Monthly Conductivity @25-C PH` SM 4500 pH Units Grab Monthly PCBs 8081 4g11 24-hour composite Quarterly Acute Toxicity' 600/4-90-027F %Survival 24-hour composite Quarterly Flow mgd Meter Continuous Temperature •F Grab Monthly All methods are EPA methods with the exception methods denoted SM which are Standard Methods Fathead minnows,at average temperature and pH for the canal based on the last four samples. 3 pH and Temperature shall be determined at the time of sample collection If the treatment system is inoperable for 72 hours or more, then on the first day of discharge following shut-down, the Discharger shall monitor and record data for all of the constituents listed above, after which the frequencies of analysis shall be doubled for the period of one month. Following one month of additional sampling, the frequencies given in the schedule shall apply. In no event shall the Discharger be required to monitor and record data more often than twice the frequencies listed in the schedule.