SITE INFORMATION AND CORRESPONDENCE

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MONITORING AND REPORTING rAOGRAM NO.R5-2005-XXXX -2- FORMER 2-FORMER CONNELL MOTOR LIFT TRUCK SAN JOAQUIN COUNTY the above-named wells and any wells installed subsequent to the issuance of this MRP, shall follow the schedule below. If present, monitoring wells with free phase petroleum(free) product or visible sheen shall be monitored for product thickness and depth to water only, and bailed to remove free product. A sample of free product(if present) must be collected at least once and analyzed for classification of product and to obtain a chromatograph for comparison to dissolved hydrocarbons detected in other we s. The volume of extracted groundwater and petroleum product (if present) shall be provided in quarterl monitoring reports. Sample collection and analysis shall follow standard EPA protocol. SAMPLING FREQUENCY` Quarterly Semi-Annually Annually Wells MW-1 MW-2 MW-3 MW-5 MW-6 MW-9 MW-10 MW-4 MW-29 Onsite MW-7 MW-8 MW-15 MW-16 MW-11 MW-12 MW-13 Supply Well MW-17 MW-18 MW-22 MW-23 MW-14 MW-19 MW-20 MW-24 MW-25 MW-26 MW-27 MW-21 MW-28 MW-30 MW-31 MW-32 MW-33 MW-34 MW-35 MW-36 MW-37 OW-1 OW-2 New Wells All wells will be monitored quarterly for water levels,and the presence and thickness of free product. Constituents EPA Analytical Max.Detection Method Limit(jag/1)' All Volatile Organic 8260B 0.5 Compounds,including Ethylene Dibromide and 1,2- Dichlorethane Total Petroleum Hydrocarbons (TPH),as Gasoline 8260B or 8015M 50 TPH,as Diesel 8015M 100 TPH,as Stoddard Solvene 8015M 100 Benzene 8260B 0.5 Toluene 8260B 0.5 Ethylbenzene 8260B 0.5 Xylene 8260B 0.5 Dissolved Lead3 7241 10 MTBE4- 8260B 0.5 TBA' 8260B 5 TAME4 8260B 0.5 DIPE4 8260B 0.5 ETBE4 8260B 0.5 Ethanol4 8260B 50 Methanol4 8260B 100 1 For nondetectable results. 2 Stoddard Solvent shall be analyzed in all monitoring wells during two monitoring events in the first and third quarters. If results are nondetectable for Stoddard Solvent or the results do not conform to the standard for both sampling events,no further monitoring for Stoddard Solvent is required in that well. If Stoddard Solvent is detected,it shall be added to the quarterly monitoring program for the well in which it was detected. 3 If dissolved lead is detected,the Discharger shall perform verification sampling within 30 days of submittal of the monitoring report. If lead pollution is verified,the Discharger shall continue quarterly monitoring for dissolved lead. If the presence of dissolved lead is not confirmed,no further test is required. 4 Fuel oxygenates,including MTBE,methanol,ethanol,tertiary butyl alcohol(TBA),tertiary amyl methyl ether(TAME),di-isopropyl ether(D1PE),and ethyl tertiary butyl ether(ETBE)shall be analyzed in all monitoring wells during two monitoring events in the first and third quarters. If results are nondetectable for fuel oxygenates for both sampling events,no further monitoring for oxygenates is required in that well. if a fuel oxygenate is detected,it shall be added to the quarterly monitoring program for the well in which it was detected.