SITE INFORMATION AND CORRESPONDENCE

Home Browse Search

MONITORING AND REPORTINGOGRAM NO. -2- SOUTH SHORE PARCELS,L&M RABLE UNIT • CONOCOPHILLIPS PETROLEUM COMPANY;CHEVRON,U.S.A.; TEXACO REFINING AND MARKETING,INC.;TOSCO CORPORATION; L&M PETROLEUM COMPANY,INC.;AND MR.BILLY MCKINNON STOCKTON,SAN JOAQUIN COUNTY groundwater also shall be provided in monitoring reports. Sample collection and analysis shall follow standard EPA protocol. Maximum Detection Sampling Constituents EPA Analytical Method Limit(µg/q' Frequency' Depth to Groundwater --- --- Quarterly Volatile Organic Compounds 8021B or 8260B 0.5 Quarterly Semivolatile Organic Compounds 8270 various' Quarterly TPH as Gasoline 8015M 50 Quarterly TPH as Diesel(Extractable) 8015M4 50 Quarterly TPH as Motor Oil(Extractable) 8015M4 50 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 0.5 Quarterly Dissolved Metals' 6000/7000 various' Semi-annually, MTBE' 8260B 0.5 Quarterly TBA' 8260B 5 Quarterly TAME' 8260B 0.5 Quarterly DIPE7 8260B 0.5 Quarterly ETBE' 8260B 0.5 Quarterly Ethanol' 8260B 50 Quarterly Methanol' 8260B 100 Quarterly For nondetectable results. ' Groundwater level measurements for all South Shore Parcel monitoring wells shall be collected within an eight-hour period. Groundwater sampling activities for all wells requiring sampling shall be collected within five days. If the OUs are collecting water levels and performing sampling separately,the activities must be coordinated to meet these requirements. ' Maximum detection limits must meet or be lower than the applicable water quality objective,unless this is not achievable by an EPA or State approved laboratory method. See Table 2 for a list of applicable water quality objectives. ° Without silica gel cleanup. s Dissolved metals to be analyzed include antimony, arsenic,beryllium,cadmium,chromium, copper,mercury,nickel,lead, T selenium, silver,thallium, and zinc. lJ Semi-annual sampling shall be conducted during the first and third quarters. 1 Fuel oxygenates,including methyl tertiary butyl ether(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 fust and third quarter monitoring events. If results are nondetectable for fuel oxygenates in all wells during both monitoring events,no further monitoring for oxygenates is required. If a fuel oxygenate is detected in either monitoring event, it shall be added to the quarterly monitoring program for the well in which it was detected. REPORTING When reporting the 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.