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31-0329 <br /> Table 1 <br /> Summary of Results of Ground Water Sampling <br /> Chevron service Station No. 9-6465 <br /> 5608 North Pershing Avenue, Stockton, California <br /> Concentrations in parts per billion (ppb) <br /> assasx:wxx=aaaaaaaaasaaassssssssssaaaxssxxsssssssssaa=aaaaaassas_ecnn_znax3cssxxcsaxcxxxasgaaaaaaaaaasasasxxsrxxxxxxxxxxx <br /> WELL DATE OF CASING DEPTH GROUND TPH-G B T E X 1,2-DCA LAB <br /> ID SAMPLING/ ELEVATION TO WATER <br /> MONITORING WATER ELEVATION <br /> spaxaaaaaaaaasasaassxssaassxxxxxxxsxaxsaasssssssasaacaasassscasastsssssysnsxcxxnxxceeexexxxapppxaxxxa�axaaaaaaaxssassssssss <br /> TB 03/23/89 NA NA NA ND<500 ND<O 5 ND<0.5 ND<0.5 ND<0.5 --- SAL <br /> TB 07/19/89 NA NA NA ND<500 ND<0 5 ND<0.5 ND<0.5 0<0.5 --- SAL <br /> TB 10/05/89 NA NA NA ND<250 N0<O.5 ND<0.5 ND-c0.5 ND<0.5 --- PACE <br /> TB 05/09/90 NA NA NA ND<50 ND<0.3 ND<O 3 ND<0.3 ND<0.6 --- GTEL <br /> TO 07/04/90 NA NA NA ND<50 ND<O 3 ND<O 3 ND<0.3 ND<0.6 --- GTEL <br /> TB 08/17/90 NA NA NA ND450 ND<O 3 0 3 ND<0.3 1 --- GTEL <br /> TB 10/22/90 NA NA NA ND<50 ND<0.3 ND<0.3 ND<0.3 ND4.6 --- GTEL <br /> TB 01/19/91 NA NA NA ND<50 ND<O 5 ND<0.5 ND<0.5 ND-c0.5 --- SAL <br /> TB 07/21/91 NA NA NA ND<50 ND<O 5 ND<0.5 ND<0.5 ND<O 5 --- SAL <br /> TO 10/17/91 IIA NA NA ND<50 NO-0.5 ND<0.5 ND<O 5 ND<O 5 --- SAL <br /> TB 01/09/92 NA NA NA ND<50 ND<0.5 ND4.5 ND<0.5 IID<0.5 --- SAL <br /> TB 03/19/92 NA NA NA ND<50 ND<0.5 ND<O 5 ND<O 5 ND<O 5 --- SAL <br /> TB 07/01/92 NA NA NA ND<50 ND<0.5 ND<O 5 ND<0.5 ND<0.5 --- SAL <br /> TB 09/16/92 NA NA NA ND<50 ND<0.5 ND<O 5 ND<O 5 ND<0.5 --- SAL <br /> TO 01/05/93 NA NA NA ND<50 ND<0.5 ND<O 5 ND<0.5 ND4.5 --- SAL <br /> -------------------------------------------------------------------------------------------------------------------------------------- <br /> EXPLANATION OF ABBREVIATIONS: <br /> TPH-G :Total Petroleum Hydrocarbons as Gasoline TB :Trip Blank <br /> (EPA method 8015 modified) D :Duplicate <br /> B :Benzene (EPA method 8020 or 8240) e & C :Brown & Caldwell Labs <br /> T Toluene (EPA method 8020 or 8240) CCAS :CCAS Labs <br /> E .EthyLbenzene (EPA method 8020 or 8240) SAL :Superior Analytical Labs <br /> X Xylenes (EPA method 8020 or 8240) GTEL GTEL LABS <br /> 1,2-DCA 1,2-Dichloroethane PACE PACE Labs <br /> --- Not Analyzed/Not Measured Not sampled due to insufficient water in well. <br /> NA Not Applicable/Not Available •• Sampled separately to confirm results <br /> NO Not Detected Dry well. <br /> ## Single peak in gasoline range <br /> + Not monitored due to historical insufficience <br /> of water in well and proximity to deeper well <br /> ++ :Not monitored due to historical insufficience <br /> of water in well and histrical absence of <br /> dectectable hydrocarbons <br /> Note: Top of casing and ground water elevations are expressed as feet above mean sea Level (NGVD -1929) <br /> 29-Jan-93 Page 9 <br /> 0 • 0 <br />