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MONITORING AND REPORTINPPROGRAM NO.R5-2003-XXXX is -2 - PACIFIC GAS AND ELECTRIC COMPANY McMULLIN NATURAL GAS DEHYDRATOR STATION SAN JOAQUIN COUNTY Analyses and Sampling Frequency EPA Analytical Max. Detection Sampling Constituents Method Limit(µg/1)3 Frequency Depth to Groundwater --- 0.01 foot Quarterly 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 2.0 Quarterly TPH-gasoline2 8015M 50 Quarterly TPH-diesel2 8015M 50 Quarterly TPH-motor oil2 8015M 500 Quarterly E For nondetectable results. i Results reported in these ranges are for comparison purposes. This is a natural gas facility, so the resulting chromatograph will not match refined fuel standards. 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 1 st day of the second"ifnontli following the end of each calendar quarter (i.e.,by 1 February, I 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: (a) a description and discussion of the groundwater sampling event and results, including trends in the concentrations of pollutants and groundwater elevations in the wells, how and when samples were collected, and whether the pollutant plume(s) is delineated; (b) field logs that contain, at a minimum,water quality parameters measured before, during, and after purging, method of purging, depth of water, volume of water purged, etc.; (c) groundwater contour maps for all groundwater zones, if applicable; (d) isocontour pollutant concentration maps for all groundwater zones, if applicable;