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MONITORING AND REPORTING PROGRAM NO. R5-2007-0808 -2- <br /> NEW WEST PETROLEUM/FLAG CITY SHELL <br /> SAN JOAQUIN COUNTY <br /> The Dischargers shall obtain all local and state permits and access agreements necessary to <br /> fulfill the requirements of this Order prior to beginning the work. <br /> GROUNDWATER MONITORING <br /> As shown on Figure 3, there are seventeen groundwater-monitoring wells, designated MW-1 <br /> through MW-9D. Also, there are five groundwater extraction well (EW-1 through EW-5) for the <br /> Interim GE remediation system. The groundwater monitoring program for the above-named <br /> wells and any wells installed subsequent to the issuance of this MRP, shall follow the schedule <br /> below. If present, monitoring wells with free phase petroleum (free) product or visible sheen <br /> shall be monitored for product thickness and depth to water only, and bailed to remove free <br /> product. A sample of free product (if present) must be collected at least once and analyzed for <br /> classification of product and to obtain a chromatograph for comparison to dissolved <br /> hydrocarbons detected in other wells. The volume of extracted groundwater and petroleum <br /> product (if present) shall be provided in quarterly monitoring reports. Sample collection and <br /> analysis shall follow standard EPA protocol. <br /> SAMPLING FREQUENCY <br /> Quarterly <br /> Wells EW-1 EW-2 EW-3 EW-4 EW-5 MW-1 MW-2 MW-3A MW-3B MW-4A <br /> MW-413 MW-4C MW-513 MW-5C MW-6B MW-6C MW-7A MW-78 <br /> MW-8A MW-813 MW-913 MW-9C MW-91D CSA-31 Well 1 and CSA-31 <br /> Well 2 New Wells <br /> All wells will be monitored quarterly for water levels, and the presence and thickness of free product. <br /> Constituents EPA Analytical Max. Detection <br /> Method' Limit (Ng/I)2 <br /> Total Petroleum 8260B or 8015M 50 <br /> Hydrocarbons (TPH), <br /> as Gasoline 826062 0.5 <br /> Benzene 8260B 0.5 <br /> Toluene 8260B 0.5 <br /> Ethylbenzene 82608 0.5 <br /> Xylene 8260B 0.5 <br /> MTBE 8260B 5 <br /> TBA 8260B 0.5 <br /> TAME 82608 0.5 <br /> DIPE 8260B 0.5 <br /> ETBE 8260B 50 <br /> Ethanol 82608 100 <br /> Methanol 82608 100 <br /> 1 Requests for equivalent, substitute EPA Analytical Methods must be approved by Regional Board staff <br /> letter. <br /> 2 For nondetectable results. <br />