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MONITORING AND REPORTIN .ROGRAM NO.R5-2002-0838 -2 - VOLPI FARM SAN JOAQUIN COUNTY EPA Analytical Max.Detection Sampling Constituents Method Limit(µg/1)1 Frequency Depth to Groundwater --- --- Quarterly Total Petroleum Hydrocarbons(TPH-g, 8015M 50 Quarterly TPH-d,and TPH-mo) Benzene 8020 or 8260B 0.5 Quarterly Toluene 8020 or 8260B 0.5 Quarterly Ethylbenzene 8020 or 8260B 0.5 Quarterly Xylene 8020 or 8260B 0.5 Quarterly Dissolved Lead2 7241 10 Quarterly MTBE3 8260B 0.5 Quarterly TBA3 8260B 5 Quarterly TAME' 8260B 0.5 Quarterly DIPE3 8260B 0.5 Quarterly ETBE' 8260B 0.5 Quarterly Ethanol3 8260B 50 Quarterly Methanol' 8260B 100 Quarterly I For nondetectable results. 2 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. 3 Fuel oxygenates,including MTBE,methanol,ethanol,tertiary butyl alcohol(TBA),tertiary amyl methyl ether (TAME),di-isopropyl ether(DIPE),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. REPORTING When reporting data, the Discharger shall arrange the information in tabular form so that the date,the constituents, and the concentrations are readily discernible. The data shall be summarized in such a manner as to illustrate clearly the compliance with this Order. In addition, the Discharger shall notify the Board within 48 hours of any unscheduled shutdown of any soil vapor and/or groundwater extraction system. As required by the California Business and Professions Code Sections 6735, 7835, and 7835.1, all reports shall be prepared by a registered professional or their subordinate and signed by the registered professional. Quarterly reports shall be submitted to the Board by the 1st day of the second month following the end of each calendar quarter (i.e., by 1 February, 1 May, 1 August, and 1 November) until such time as the Executive Officer determines that the reports are no longer necessary. Each quarterly report shall include the following minimum information: