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TABLE 1 <br /> ANALYTICAL RESULTS FOR METALS <br /> SOIL AND OIL SAMPLES <br /> HISTORICAL PIPELINES <br /> Chevron Environmental Management Company <br /> Concentrations reported in mg/kg <br /> Chromium Molyb- <br /> Sample Name Site Name Date TPHc Antimony Arsenic Barium Beryllium Cadmium (Total) Cobalt Copper Lead Mercury denum Nickel Selenium Silver Thallium Vanadium Zinc <br /> Oil-Recent <br /> is <br /> MW-3 Alden Park,Tracy,CA 2004 NA <2.03 3.31 <6.76 <0.676 <0.676 <0.676 1.23 2.92 <0.676 <0.100 <3.38 51.3 <0.676 <0.676 <0.676 24.9 <6.76 <br /> MW-1 Hickson Kerley,Antioch,CA 2004 NA <2.88 4.57 <9.62 <0.962 <0.962 1.68 1.1 18 <0.962 <0.100 <4.81 38.9 <0.962 <0.962 <0.962 18.8 <9.62 <br /> REW-3 TAOC Tracy Pump Station,Tracy,CA 2004 NA <2.34 5.34 <7.81 <0.781 <0.781 1.18 <0.781 2.09 <0.781 <0.100 <3.91 32.8 <0.781 <0.781 <0.781 21.7 <7.81 <br /> Oil-Historical° <br /> SJV-Kern River SJV crude oil 1995 NA NA 0.23 <0.09 NA NA <0.36 NA <0.27 <2.7 <0.44 0.76 65.8 NA NA NA 29 3.03 <br /> SJV-Behid e SJV crude oil 2000 NA <5.0 <0.25 0.218 <0.1 <0.2 0.364 NA <3.0 <3.0 <0.024 <1.0 64.1 <0.25 <5.0 <20 82.4 0.72 <br /> SJV-KLM SJV crude oil 2000 NA <5.0 <0.25 <0.1 <0.1 <0.2 0.607 NA <3.0 <3.0 0.03 <1.0 55.4 <0.247 <5.0 <20 45.1 0.714 <br /> CP-0-0101 Alden Park,Tracy,CA 2001 170,000 <3.38 <6.67 <3.38 <0.169 <0.169 0.619 <0.338 1.85 <6.76 <0.1 <0.676 12.4 <5.07 <1.69 <6.76 6.64 0.975 <br /> Pipe#1 1 Byron Hot Springs Pum Station,Byron,CA 2002 NA NA <0.758 <7.58 1 NA <0.758 <0.758 <0.758 1 0.871 1.21 <0.2 <3.79 29.9 <0.758 <0.758 <0.758 21.3 <7.58 <br /> Lyoth,Tracy Pump Station(Renown),and Alden <br /> Prod-comp Park,Tracy,CA 2002 300,000 <0.391 1.08 <3.91 <0.391 <0.391 <0.391 0.543 3.17 0.395 <0.2 <1.95 22 <0.391 <0.391 <0.391 12.7 <3.91 <br /> AVERAGE METALS CONCENTRATION IN OILS -- -- 3.0 2.47 2.50 0.45 0.52 0.74 0.79 3.91 2.16 0.14 1.07 41.4 0.58 0.71 0.71 29.17 4.57 <br /> Screening Criteria for Soil <br /> LBNL6 Background Concentrations in CA 1995 NA 5.5 19.1 323.6 1 2.7 99.6 22.2 69.4 16.1 0.4 7.4 119.8 5.6 1.8 27.1 74.3 106.1 <br /> Kerney' Background Concentrations in CA 1996 NA 0.6 3.5 509 1.28 0.36 122 14.9 28.7 23.9 0.26 1.3 57 0.058 0.8 0.56 112 149 <br /> Residential PRG$ Health Screening Criteria 2004 NA 31 0.062 5,400 150 37 210 900 3,100 150 23 390 1,600 390 390 5.2 78 23,000 <br /> Environmental Screening Criteria,groundwater is a <br /> ESL9-residential current or potential resource 2005 500 6.1 5.5 750 4 1.7 580 10 230 150 3.7 40 150 10 20 1 110 600 <br /> CHHSLs10 Health Screening Criteria 2005 NA 30 0.07 5,200 150 1.7 150,000 660 3,000 150 18 380 1,600 380 380 5 530 23,000 <br /> Abbreviations: <br /> <=Analyte not detected above the laboratory reporting limit <br /> BAPL=Bay Area Products Line <br /> CA=California <br /> CAM=California Assessment Manual <br /> CHHSLs=California Human Health Screening Levels <br /> CPL=Chevron Pipeline Company <br /> EPA=U.S.Environmental Protection Agency <br /> ESL=Environmental Screening Levels <br /> ETC=Chevron Energy Technology Company <br /> IDW=Investigation-derived waste <br /> KLM=Kern-Los Medanos <br /> LBNL=Lawrence Berkeley National Laboratory <br /> mg/kg=Milligrams per kilogram <br /> NA=Not analyzed <br /> PRG=Preliminary Remediation Goal <br /> RWQCB=California Regional Water Quality Control Board <br /> SAIC=Science Applications International Corporation <br /> SJV=San Joaquin Valley <br /> TAOC=Tidewater Associated Oil Company <br /> TPH=Total petroleum hydrocarbons <br /> TPHc=TPH quantified as crude oil <br /> Notes: <br /> 1."IDW"or"Comp"in sample name indicates composite for disposal. <br /> 2. Average metals concentration in soil calculated by using detection limit for samples with no detectable metals. Averages for cadmium and thallium calculated without the elevated detection limits from samples BP-14 and GP-1,collected at the Gonzales Property,in Newman,CA. <br /> 3. Oil-Recent SJV crude oil samples collected by SAIC and sent to Friedman and Bruya,Inc.,for CAM 17 metals analyses by EPA Method 6000/7000 Series under SAIC chain-of-custody protocol. Crude oil samples were sent by Friedman and Bruya,Inc.,to their subcontractor laboratory North Creek <br /> Analytical,Inc.,for analyses. <br /> 4. Oil-Historical SJV crude oil samples analyzed by ETC for properties of crude. Samples contained approximately 1 percent(by weight)sulfur. <br /> 5. Average metals concentration in oil calculated without elevated detection limits for molybdenum,selenium,silver,and thallium. <br /> 6. LBNL,1995. <br /> 7. Kearney Foundation of Soil Science,1996. Kearney Foundation Special Report:Background Concentrations of Trace and Major Elements in California Soils,March 1996 <br /> 8. EPA Region 9 Preliminary Remediation Goal for residential use(Oct.2004);California-modified PRG used when available. <br /> 9. RWQCB,2005.Screening for Environmental Concerns at Sites with Contaminated Soil and Groundwater,Vol.2:Background Documentation for the Development of Tier 1 Environmental Screening Levels,February 2005. Residential values for groundwater as a current or potential drinking water resource <br /> are the same as the residential values for groundwater not as a current or potential drinking water resource. <br /> 10.Calfornia Environmental Protection Agency,January 2005,Use of Human Health Screening(CHHSLs)In Evaluation of Contaminated Properties <br /> T <br /> FJP1 aQ <br /> � t1`r® <br /> rmm Science to Solutrwu <br /> Page 3 of 3 <br />