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i s • <br /> 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 /> assxxasaasasasssssaxasasaaasaasssaaasasa:aaaasaasxaaaagaaaaaassaas=_cec_c_3azrsamaaasasaasssssaassasazazaasssaaaaassasaaa=a <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 /> asazzaazzazaamassaasaaaaaasssasasasaasasaaasxsaasaaaaaaasazsazsaazsaaaaa=aaazs-ee,eea=zeccnc._aaa3zasaaaassaaaasssssssssa <br /> 7B 03/23/89 MIA MA NA ND<500 ND<0.5 ND<O 5 MD<0 5 ND<O 5 --- SAL <br /> TB 07/19/89 NA NA NA NO-0500 ND<0.5 ND<O 5 ND<0.5 ND<0 5 --- SAL <br /> TO 10/05/89 NA NA NA ND<250 ND<O 5 ND<O 5 ND<0.5 ND<0.5 --- PACE <br /> TB 05/09/90 NA NA NA ND-60 ND<O 3 ND<0 3 ND<0.3 ND<0.6 --- GTEL <br /> TO 07/04/90 NA NA NA MD<50 ND<0 3 ND<0.3 ND<O 3 ND<0.6 --- GTEL <br /> TB 08/17/90 kA NA NA ND<50 ND<O 3 0.3 ND<O 3 1 --- GTEL <br /> TO 70/22/90 NA NA NA N0<50 04.3 ND<0.3 ND<0 3 ND<0.6 --- GTEL <br /> TO 01/19/91 NA NA NA ND<50 ND<O 5 ND4.5 MD<0 5 ND<0.5 --- SAL <br /> TB 07/21/91 NA NA NA ND<50 N0<0 5 ND<0.5 ND<0 5 ND<0.5 --- SAL <br /> TB 10/17/91 NA NA NA ND<50 ND<0 5 ND<0.5 MD<O 5 ND<0.5 --- SAL <br /> TO 01/09/92 NA NA NA ND<50 ND<O 5 ND<0.5 ND<O 5 ND<0.5 --- SAL <br /> TB 03/19/92 NA MA NA ND<50 ND<O 5 ND40.5 ND-CO 5 ND<0.5 --- SAL <br /> --------------------------------------------------------------------------------------------------------------------------------------------- <br /> EXPLANATION OF ABBREVIATIONS: <br /> TPH-G :Total Petroleum Hydrocarbons as Gasoline ND :Not Detected <br /> (EPA method 8015 modified) TB :Trip Blank <br /> B :Benzene (EPA method 8020 or 8240) D Duplicate <br /> T :Toluene (EPA method 8020 or 8240) e & C Brown & Caldwell Labs <br /> E :Ethyibenzene (EPA method 8020 or 8240) CCAS CCAS Labs <br /> X -Xylenes (EPA method 8020 or 8240) SAL Superior Analytical Labs <br /> 1,2-DCA 1,2-Dichtoroethene GTEL GTEL LABS <br /> --- .Not Anatyzed/Not Measured PACE PACE Labs <br /> E NA :Not Applicable/Not Available * Not sampled due to insufficient water in well <br /> ** Sampled separately to confirm results. <br /> Mote: Top of casing and ground water elevations are expressed as feet above mean sea level (NGVD -1929) <br /> --------------------------------------------------------------------------------------------------------------------------------------------- <br /> i <br /> 24-Apr-92 Page 8 <br />