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<br /> GEOMATRIX
<br /> TABLE A•-2
<br /> HISTORICAL GROUNDWATER ANALYTICAL RESULTS
<br /> 35275 Welty Road
<br /> Vernalis, California
<br /> Concentrations reported in micrograms per liter(µg/1)
<br /> Sample Ethyl- cis-1,2-
<br /> Sample ID Date TPHg TPH(f TPHmo MTBE Benzene Toluene Benzene Xylenes TCE DCE PAHs
<br /> W11 3130/95 <0.05 NA NA NA ND' <2 <2 <2 <20 ND NA
<br /> MW-1' 10/1/96 61,000 3,000 NA NA <1000 <1000 <1000 <1000 <1000 <1000 NA
<br /> se <0.4/<1.O' <0.4/<1.0' 2.11<1.07 1.71<1.07 <0A/<107 <l.0 NA
<br /> CPT-],3G-39' ' 2127197 NA NA NA NA
<br /> CPT-1,50-53'
<br /> 6 2127/97 NA NA NA NA <0.4/<1.07 <0.4/<1.07 4.7/<1.07 2.8/<I.07 <0.4/<107 <1.0 NA
<br /> CPT-1,50-53'(dup)6 2/27/95 NA NA NA NA <0.4/<1'07 <0.4/<I.07 4.41<1.07 2.8/<1.07 <0.4/<10' <L0 NA
<br /> CPT-2,36-39'6 2/27/97 NA NA NA NA <0.4/<I.0' <0.4/<1.07 5.9/<I.07 L9/<1.07 <0.4/<107 <1.0 NA
<br /> CPT-2,49-51'6 2127197 NA NA NA NA 0.4!<1'07 <0.4/<1.07 4.51<1.07 3.4/<1.07 <0.4/<107 <1.0 NA
<br /> ' .0' .1/< .47 1.0!< . ' 7
<br /> 6 <0.4/<l <0.4/<1
<br /> CPT-3,32-35' 2127197 0 2.4 NA
<br /> CPT-3,50-53'6 2127!97 NA NA NA NA <0.4/<1.07 <0.4/<I.07 <0.41<1.07 <0.41<1.07 <0.4/<10' <1.0 NA
<br /> COO I-GW(MW-4)' 7/28/98 <100 <50 <50 <10 <0.3 <0.3 <0.5 <0.6 NA NA <10
<br /> C002-GW(MW-2) 7/28/98 <100 2300 700 <]0 <0.3 <0.3 <0.5 <0.6 NA NA <iQ
<br /> 0003-GW(MW-3) 7/28198 <€00 300 <50 <]0 <0.3 <0.3 <0.5 <O.G NA NA <iQ
<br /> Notes:
<br /> Inc. of Walnut Creek,Califomia, and analyzed by Sequoia Analytical of Walnut Creek,California, for TPHg by EPA
<br /> Sample collected by ERM-West,
<br /> Method 8015,TPHog by Standard Method 5520,and for VOCs by EPA Method 8240.
<br /> s NA =Not analyzed.
<br /> ' ND=Not detected at or above laboratory reporting limit; used where detection limit not reported.
<br /> Inc.,of Modesto,Califomia,and analyzed by Sherwood Labs Corp. of Hilmar,California, for TPHg,TPHd,
<br /> Sample collected by Geological Technics,
<br /> TPHmo,and TPHk by EPA Method 8015M,and by Sequoia Analytical of Sacramento,California, for VOCs by EPA Method 8240.
<br /> s Samples collected by Radian International LLC of Walnut Creek,California,and analyzed by NEI/GTEL Environmental Laboratories, Inc., for VOCs by EPA
<br /> Method 8260A, and for BTEX and TCE by EPA Method 8010/8020.
<br /> 6 lsopropylbenzene,n-propyl benzene, sec-butylbenzene,and naphthalene were detected in the samples, but were also detected in the travel blank submitted with
<br /> the samples.
<br /> 7 Results reported as: EPA Method 8010, 8020/EPA Method 8260A.
<br /> a Samples collected by Radian frntemational and analyzed by Core Laboratories of Anaheim,California, for TPHg,TPHd, and TPHmo by EPA Method 8015M,
<br /> BTEX and MTBE by EPA Method 8020,and PAHs by EPA Method 8270.
<br /> Definitions:
<br /> TPHg=Total petroleum hydrocarbons(TPH) TPHog=TPH quantified as oil and grease. MTBE=Methyl tertiary butyl ether.
<br /> quantified as gasoline. TPHk=TPH quantified as kerosene. TCE=Trichloroethene.
<br /> TPHd=TPH quantified as diesel. VOCs=Volatile organic compounds. cis-1,2-DCF=cis 1,2 dichloroethene,
<br /> TPHmo=TPH quantified as motor oil. BTEX=Benzene,toluene,ethylbenzene,xylenes. PAHs Polynuclear aromatic hydrocarbons.
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