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30-140-01 <br /> Table 1 <br /> Summary of Results of Ground (later Monitoring and Sampling <br /> Former Mobil Station 04-NP4 <br /> 2375 Tracy Boulevard, Tracy, California <br /> Concentrations in parts per billion (ppb) <br /> aazmamsaasasaaaazza_aaaaamsasaxsaazmaaaasasszaaaaszaaanaasaaaasaaaaaaaaaasxsxsssxsaaazzaarcccrca=_axaasasasaaaa7caaasaaa <br /> WELL DATE OF CASING DEPTH GROUND FREE TPH-G B T E X LAS <br /> ID SAMPLING/ ELEVATION TO WATER PRODUCT <br /> MONITORING (ft-msl) HATER (ft) ELEVATION THICKNESS <br /> asaaasmzzamzaaaaaaasa«aaaszassasaaas:aaazaaa=aaansaaaasaaaaaaassxssassassaazaaaacsxasr_aaa»_x«aaaasaaaa«sasaamasrxssssaax <br /> ANW-5 12/10/91 26.19 5.95 20.24 0 00 ND<30 ND<0 30 ND<O 30 ND<0 30 ND<0.30 SEO <br /> ANW-600 12/10/91 26.33 5.85 20.48 0.00 ND<30 ND<0.30 ND<O 30 ND4.30 ND<O 30 SEO <br /> -------------------------------------------------- ---------------------------------------------------------------------- <br /> EXPLANATION TO ABBREVIATIONS: <br /> TPH-G :Total Petroleum Hydrocarbons as Gasoline 0 NW-5 was additionally tested for the following <br /> (EPA method 8015 modified) Method Analyte Amount Found <br /> B :Benzene (EPA method 8020 or 8240) xasssaaxsasaaaaaaaaaoo=====-----=--========aaaaa <br /> T -Toluene (EPA method 8020 or 8240) 120 1 Conductivity 1286 umhos/cm <br /> E :Ethylbenzene (EPA method 8020 or 8240) 160 1 Total Suspended Solids 789 mg/l <br /> X .Xylenes (EPA method 8020 or 8240) 160 1 Total Dissolved Solids 953 mg/l <br /> --- -Not sampled / not measured 410.4 Chemical Oxygen Demand 190 <br /> NA *Not Applicable/Not Available 360.1 Dissolved oxygen 1 3 mg/l <br /> ND .Not detectable at or above reported NA PH 7 60 <br /> laboratory detection limit <br /> CAL :Chromalab, Inc. <br /> SAL :Superior Analytical Lab 00 NW-5 and AMW-6 were additionally analyzed for <br /> SEO •Sequoia Analytical Fecal Coliform (CFU a Colony Forming Units) <br /> t ,Equivalent ground water elevations calculated MW-5 > 1600 CFU/100m1, MW-6 m 140 CFU/10Om1 <br /> assuming 0.8 specific gravity for free-floating <br /> product <br /> NOTES: Casing elevations were surveyed with respect to most southwesterly anchor bolt of the signal standard located <br /> at the most southerly return of the southwesterly corner of the intersection of Grant Line Road and <br /> Tracy Boulevard (elevation m 26.13). <br /> 13-Apr-92 Page 6 of 6 <br />