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CRA <br /> Table 1. Groundwater Extraction System Analytical Results, Former Shell Service Station, 2575 Country Club Boulevard, Stockton, California �. <br /> Influent MidfluentI Midfluent2 Mielfluent3 Effluent <br /> Sample TPHg Benzene MTBE TBA TPHg Benzene MTBE TBA TPHg MTBE TBA MTBE TBA TPHg Benzene MTBE TBA TRPH pH <br /> Dace Cone. Cone Cone. Cone, Conn. Cone Coco. Conc. Cone, Cone. Cenc. Conc. Cone. Cone. Cone Cone. Conc. Conn. <br /> b b b' (ppb) (ppb) (ppb) <br /> b . b (PP <br /> (Pp ) (ppb) (PP ) <br /> (mm/dd/n) (ppb) (ppb) (PPb) (ppb) (ppb) (ppb) (Ppb) (ppb) (ppb) (Pp ) CPP ) (P <br /> 03/11/08 NA NA 71200 47000 NA NA 12.0 31600 NA <0.50 <5.0 <0.50 56.0 NA NA <0.50 <5.0 NA NA <br /> 03/13/08 17,000 31000 61300 2,900 120 < 5.00 15.0 3,900 55 < 5.00 1700 < 2.50. 350 G50 <0.50 <0.50 17.0 <1 ,000 7. 1 <br /> 03/25/08 NA NA 57500 51100 NA NA <0.50 <5.0 NA <0.50 <5.0 i <0.50 <5.0 NA NA <0.50 <5.0 NA 9.8 „+ <br /> Abbreviations & Notes: - <br /> 1 <br /> TPHg = Total purgeable hydrocarbons az gasoline <br /> MTBE = MeNyl tert-butyl ether <br /> Conc. = Concentration <br /> ppb = pans per billion, equivalent to µpA - <br /> TPHg, benzene, and MTBE analyzed by EPA Method 8260 <br /> TRPH (hexane extractable = oil and grease) analyzed by EPA Method 1664. <br /> PH analyzed by EPA Method 150.1. <br /> Discharge Limits: TPH = 100 mg/L; benzene = 0.5 read , MTBE = 0.5 "/L, PH 5.0 < x < 10.0 + <br /> NS = Not sampled <br /> NA = Not analyzed _ IM <br /> N/A = Not applicable <br /> a = TRPH concentration used in lieu of TPHg <br /> ' TPH and pH were sampled on 7125/03, not )121/03. <br /> a The sample collected con 7/10/03 was a wnfirmettion sample after the addition of the fourth carbon vessel. he effluent was captured in the =star tank. <br /> s STL San Francisco analyzed the pH sample collected on 9/10/03 out of hold time. <br /> ` Resample event; system shutdown after sample collected. <br /> s The July 31 2007 effluent sample was net analyzed for HEM-SGT Oil & Grease due to bottle preservation issues; therefore an additional effluent sample was collected on July 27, 2007 to be <br /> I <br /> analyzed for HEM-SGT Oil & Grease. In. . <br /> 6 Laboratorynote: Primarily compomds not fond in typical Gasoline <br /> System shutdown August 22, 2007 through November 1, 2007 for LEL meter troubleshooting. <br /> E <br /> i. <br /> I <br /> Page 4 of 4 <br /> \\Son-sl\shared\Sonoma.Shell\StecMon 2575 Country C1ub\BEMgDJATION\O&M\Coamy Club GWE Data Tables.xls\7611 SMR SA <br />