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CHEVRONTEXACO ENERGY TECHNOLOGY COMPANY <br /> INTEGRATED LABORATORY TECHNOLOGIES DEPARTMENT <br /> PROJECT SUMMARY <br /> Project No. 2004.0076a Requested by Bob Cochran <br /> Dates Initiated 7/1/04 Location CEMC <br /> Date Completed 8/03/04 6001 Bollinger Canyon Road <br /> CRTC Charge Code YWETS0110264 San Ramon, CA <br /> Phone 842-9655 <br /> Proleet Description: Analyze three soil samples labeled SB-2-6' (soil), SB-1-6.5' (soil) and SB-3-7' (soil)and <br /> three ground water samples labeled SB-2-GW (groundwater), SB-1-GW (groundwater) and SB-3-GW <br /> (groundwater) from a former Chevron fuel terminal, facility number 302792, located at 541 West Grantline <br /> Road,Tracy,CA. Identify the product and determine if jet fuel is present. <br /> Results: <br /> The samples all contain weathered, evaporated gasoline. The BTEX components have been reduced by <br /> biodegradation and/or evaporation. The light components have largely evaporated. While jet-range <br /> hydrocarbons are present,the samples do not contain jet fuel,rather the chromatograms are dominated by the <br /> heavy ends of gasoline boiling higher than approximately C8. The concentrations of hydrocarbons in the <br /> samples are shown in Table 1. The soil samples are all contaminated to varying degrees by petroleum wax, <br /> the likely source being the sample containers or the sampling apparatus. The contribution from the <br /> petroleum wax is not included in the total concentrations shown in the table. <br /> Table 1. TPH concentrations by GC-FID <br /> Sample Concentration Concentration <br /> in soil in groundwater <br /> m /k <br /> SB-2-6' soil 11.9 <br /> SB-1-6.5' soil 11.6 <br /> SB-3-7' soil 221 <br /> SB-2-GW(groundwater) 2710 <br /> SB-1-GW(groundwater) 2620 <br /> SB-3-GW undwater 1920 <br /> Estimates of the BTEX concentrations are given in Table 2. These are estimates based upon the integrated <br /> peak areas from the GC-FID chromatogram. EPA 8260 is the preferred method of quantification. <br /> Table 2. Estimated BTEX concentrations by GC-FID <br /> Sample Concentration(mgAg i Concentration <br /> Benzene I Toluene Ethylb.r Xylenes Benzene Toluene Ethylbenzene Xylenes <br /> SB-2-6' (soil) 0.1 0.6 0.1 0.6 <br /> SB-1-6.5'(soil) 0.1 0.6 0.1 0.5 <br /> SB-3-7' (soil) 0.1 5.9 1.2 1.4 <br /> SB-2-GW <br /> (groundwater) 1 280 10 20 <br /> SB-1-GW <br /> (groundwater) 1 340 9 10 <br /> SB-3-GW <br /> (groundwater) 4 70 20 10 <br />