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GEOMATRIX
<br /> TABLE 1
<br /> PREVIOUS SOIL ANALYTICAL RESULTS
<br /> U.S. Can/Welty Road
<br /> Vemalis, California
<br /> Concentrations reported in milligrams per kilogram(mg/kg)
<br /> Boring Sample Sample Sample Ethyl-
<br /> ID Depth ID Date TPHg TPHd TPHmo TPHc Benzene Toluene benzene Xylenes MTBE VOCs PAHs
<br /> GMX-4 31 GMX-4-31.0 11/10/991 NA I NA NA <50 <0.005 <0.005 <0.005 <0.005 NA NA <0.005
<br /> GMX-5 28.5 GMX-5-28.5 11/11/991 NA NA I NA <50 <0.005 <0.005 <0.005 <0.005 NA NA <0.005
<br /> GMX-6 28 1 GMX-6-28.0 11/11/99 NA NA NA <50 <0.005 <0.005 <0.005 <0.005 NA NA <0.005
<br /> GMX-7 28.5 1 GMX-7-28.5 11/11/991 NA NA NA <50 <0.005 <0.005 <0.005 <0.005 NA NA <0.005
<br /> Notes:
<br /> Sample S-6 collected by ERM-West,Inc.of Walnut Creek,California,and analyzed by Sequoia Analytical of Walnut Creek,California,for VOCs using EPA Method
<br /> 8240, Sample S-6 at 0.5 ft depth also contained 3900 mg/kg TPH quantified as oil and grease and 14 mg/kg lead.
<br /> 2 Samples designated"HB"collected by ERM-West,Inc.,of Walnut Creek,California. Complete analytical laboratory data and analytical methods used were not available.
<br /> x Sample collected by W HF,Inc.,of Oakdale,California,and analyzed by California Laboratory Services of Rancho Cordova,California,for TPHd and TPHmo using EPA
<br /> Method 8015M,and VOCs using EPA Method 8010/8020.
<br /> Sample MW-I collected by Geological Technics,Inc.,of Modesto,California,and analyzed by Sherwood Labs Corp.of Hilmar,California,for TPHg,TPHd,and TPHmo
<br /> using EPA Method 8015,and BTEX using EPA Method 8020;and by Entech Analytical Labs,Inc.of Sunnyvale,California,for VOCs using EPA Method 8240.
<br /> ' Results reported as EPA Method 8020/EPA Method 8240.
<br /> e Samples from B-1 through B-7collected by Radian International LLC,of Walnut Creek,California,and analyzed by American Environmental Network of Pleasant Hill,
<br /> California,for TPHg,TPHd,and TPHmo using EPA Method 8015M,BTEX using EPA Method 8020,and PAHs using 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 /> e Samples from B-7 through B-9 collected by Radian International and analyzed by Core Laboratories of Anaheim,California,for TPHg,TPHd,and TPHmo using EPA
<br /> Method 8015M,BTEX and MTBE using EPA Method 8020,and PAHs using EPA Method 8270. A silica gel cleanup was performed on TPHd extracts prior to analysis.
<br /> Samples collected by Geomatrix Consultants,Inc.,of Oakland,California,and analyzed by Friedman&Bruya of Seattle Washington. Sample GMX-I B was analyzed for
<br /> VOCs using EPA Method 8260. Sample GMX-2 through GMX-7 was analyzed for TPHc using EPA Method 8015M,BTEX using EPA Method 8260B,and PAHs using
<br /> EPA Method 8270 SIM,
<br /> Abbreviations:
<br /> TPHg=Total petroleum hydrocarbons(TPH)quantified as gasoline. MTBE=Methyl tertiary butyl ether.
<br /> TPHd=TPH quantified as diesel. TCE=Trichloroethene.
<br /> TPHc=TPH quantified as crude oil. 1,1,1-TCA= 1,1,1-Trichloroethane
<br /> VOCs=Volatile organic compounds. PAHs=Polynuclear aromatic hydrocarbons.
<br /> BTEX=Benzene,toluene,ethylbenzene,xylenes. NA=Not Analyzed
<br /> ND=Not Detected at or above laboratory reporting limit.
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