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STtOF CALIFORNIA GEORGE DEUKMEJIAN,Governor <br /> CALIFORNIA REGIONAL WATE QUALITY CONTROL BOARD— <br /> CENTRAL VALLEY REGION <br /> 3443 ROUTIER ROAD <br /> SACRAMENTO,CA 95827-3098 +,:: <br /> 8 February 1988 \ `� �\'` S LN <br /> Mr. Robert 0. Godwin, Associate Director <br /> University of California <br /> Lawrence Livermore National Laboratory <br /> P. 0. Box 808 <br /> Livermore, CA 94550 <br /> REVIEW OF ENVIRONMENTAL INVESTIGATION QUARTERLY REPORTS, UNIVERSITY OF CALI- <br /> FORNIA, LAWRENCE LIVERMORE NATIONAL LABORATORY (LLNL) SITE 300, SAN JOAQUIN <br /> COUNTY <br /> We have reviewed the Environmental Investigations Quarterly (EIQ) Reports for <br /> LLNL Site 300 for the second and third quarters of 1987, submitted 3 September <br /> and 7 December 1987, respectively. We have the following comments on the two <br /> reports which are referred to as EIQ-2 and EIQ-3 for the second and third <br /> quarter reports, respectively. <br /> 1. TCE Investigation <br /> a. EIQ-2, page 11 - This section refers to "near-background levels of TCE <br /> (up to 1.1 ppb)" detected in the regional aquifer. The background for <br /> TICE in ground water should be zero, not 1 ppb. <br /> b. EIQ-3, page 10 - The report states the soil venting tests at 8834 were <br /> to be conducted during the fourth quarter. We approved these tests in <br /> the summer of 1987; why was there such a long delay, were they <br /> conducted during the fourth quarter, and when will results be avail- <br /> able"? <br /> C. EIQ-3, page 12 - Figure 7 shows TCE values of 88 ppb and 133 ppb at <br /> Wells W-815-02 and W-817-03, respectively, in the regional aquifer. <br /> These values do not. match Appendix A, Table A-2 which shows 19 ppb for <br /> W-815-02 and 24 ppb for W-817-03. Also, Table A-2 shows "NA" under <br /> date column for Wells W-817-01 , W-817-03, and W-817-04. "NA" is <br /> listed to mean "not analyzed," but analyses are shown on the table on <br /> those rows. These items need to be clarified. <br /> d. EIQ-3, page 13 - The report notes that 24 ppb of 1,2-DCA was found in <br /> unused water supply well W-3 and suggests as a possible source a <br /> nearby corporation yard where "heavy equipment is parked and may <br /> undergo field servicing and maintenance. " Exactly what occurs at this <br /> yard and what waste disposal practices are used that could cause such <br /> ground water contamination? Well W-3 also is about 1200 feet down- <br /> gradient from inactive Pit 9; could Pit 9 be the source of DCA"? <br /> Clearly more investigation is needed, and study plans should be added <br /> to the Environmental Restoration Work Plan. <br />