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GEOMATRIX
<br /> TABLE A-1
<br /> HISTORICAL SOIL ANALYTICAL RESULTS
<br /> 35275 Welty Road
<br /> Vernalis, California
<br /> Concentrations reported in milligrams per kilogram(mg/kg)
<br /> Boring Sample Sample Ethyl-
<br /> ID Depth Sample ID Dale TPHg TPHd I TPHmo I Benzene Toluene benzene Xylenes MTBE VOCs PAHs Other
<br /> 69/M W-4 25 C057 7/23/98 <0.1 <10 <10 <0.0005 <0.0005 <0.0005 <0.0005 <0.01 NA ND --
<br /> B9/MW-4 30 C058 7/23/98 <0.1 <10 <10 <0.0005 <0.0005 <0.0005 <0.0005 <0.01 NA ND --
<br /> 139/MW-4 35 C059 7/23/98 <0.1 <10 <10 <0.0005 <0.0005 <0.0005 <0.0005 <0.01 NA ND --
<br /> 69/MW-4 40 C060 7/23/98 <0.1 <10 <10 <0.0005 <0005 <0.0005 <0.0005 <0.01 NA ND --
<br /> 69/MW-4 40 COLI (COGO Dup) 7/23/98 <0.1 <10 <10 <0.0005 <0.0005 <0.0005 <0.0005 <0.01 NA ND --
<br /> Notes:
<br /> Samples collected by ERM-West, Inc. of Walnut Creek,California,and analyzed by Sequoia Analytical of Walnut Creek,California, for VOCs by EPA Method 8240.
<br /> ' NA=Not analyzed.
<br /> ' Samples collected by ERM-West, Inc. Complete analytical laboratory data and analytical methods used were not available.
<br /> ' ND=Not detected at or above laboratory reporting limit; used where detection not reported or where detection limits varied.
<br /> ' Sample collected by WHF, Inc.,of Oakdale,California,and analyzed by California Laboratory Services of Rancho Cordova,California, for TPHd and TPHmo by EPA
<br /> Method 8015M,and VOCs by EPA Method 8010/8020.
<br /> e Samples collected by Geological Technics,Inc., of Modesto,California,and analyzed by Sherwood Labs Corp.of Hilmar,California, for TPHg,TPHd,and TPHmo by
<br /> EPA Method 8015,and BTEX by EPA Method 8020,and by Entech Analytical Labs,Inc. of Sunnyvale,California, for VOCs by EPA Method 8240.
<br /> ' Results reported as: EPA Method 8020/EPA Method 8240.
<br /> 9 Samples collected by Radian International LLC of Walnut Creek,California,and analyzed by American Environmental Network of Pleasant Hill,California,for TPHg,
<br /> TPHd,and TPHmo by EPA Method 8015M, BTEX by EPA Method 8020,and PAHs by EPA Method 8270.
<br /> ' Sample name changed to C035 because C013 was used twice. Sample name C035 was used again on boring B-7.
<br /> 10 Samples collected by Radian International and analyzed by Core Laboratories of Anaheim,California, for TPHg,TPHd,and TPHmo by EPA Method 8015M, BTEX and
<br /> MTBE by EPA Method 8020, and PAHs by EPA Method 8270. A silica gel cleanup was performed on PAH extracts prior to analysis.
<br /> Abbreviations:
<br /> TPHg=Total petroleum hydrocarbons(TPH)quantified as gasoline. BTEX=Benzene,toluene,ethylbenzene,xylenes.
<br /> TPHd=TPH quantified as diesel. MTBE=Methyl tertiary butyl ether.
<br /> TPHmo=TPH quantified as motor oil. TCE=Trichloroethene.
<br /> TPHog=TPH quantified as oil and grease. 1.,1,1-TCA= I,1,1-Trichloroethane
<br /> "fPHk=TPH quantified as kerosene. PAHs=Polynuclear aromatic hydrocarbons.
<br /> VOCs=Volatile organic compounds.
<br /> LToc_Sa11e15380\CPL Welty soil table.xls Page 5 of 5
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