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Coca-Cola Enterprises- West USTEC Job No. 90054.113 Comment 3) The CAR does not include the borings B-14 through B-18, which were drilled the end of October and first few days of November. E ' ! Response: The additional assessment fieldwork was conducted by USTEC in October 1990 and is discussed in Section 3.1 of this report. s Comment 4) Future samples analyzed for lead will need to be for total rather than organic lead. If the results of the total exceeds 5 ppm, the waste extraction test outlined in California Code of Regulations, Title 22, will then need to be run to determine the soluble portion of lead. i Response: USTEC has included a total lead analysis for all groundwater samples starting in the second quarter 1991. In accordance with the State of Caliiarnia Department of Toxicology ' ± recommendations;if the total Iead concentration was greater than 10 times the soluble threshold n14 limit concentration(STLC) limit of 5ppm, the Waste Extraction Test was run. Comment 5) Page<4>,(sample#008-0595),from Sequoia Analytical indicates a detection limit of 0.50 ppm for benzene and a non-detect result. Was this the detection limit used or is this a misprint? Response: USTEC checked the reported detection limit with Sequoia Analytical Laboratories, Inc.,and found that the detection limit reported was indeed 0.50 ppm. The detection limit was increased due to the sample dilution required for the analysis. A letter provided by Sequoia Analytical laboratories,Inc.which explains the reported detection limit is provided in Appendix C. 3.1 ADDITIONAL ASSESSMENT PROCEDURES Additional field assessment was conducted by USTEC from October 29, 1990 to November 5, 1990. The assessment consisted of drilling and logging of soil test borings, subsurface soil sampling, soil vapor monitoring, groundwater monitoring, vapor extraction test well construction,groundwater sampling, and soil vapor sampling. All work was conducted in