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iTATE OF CAUFORNIA GEORGE DEURMEJwN G~"%*r <br /> CALIFORNIA REGIONAL WATIR QUALITY CONTROL BOARD 7 , ,_ ,;;^- REC`j`/EO <br /> CENTRAL VALLEY REGION CFF', ;. -�".' <br /> 3x43 ROUTIER ROAD -� �;r JAN 7 1987 <br /> SACRAMENTO.CA 95827-3098 <br /> R /..+rE 1�lJ, ] p^' <br /> ' EIDISN I eZ QlaMYErf.!PROTECTION DiPE <br /> JAN 31988 v 11011TORI;IL& GUIDANCE <br /> EINy!ftu'NMENTAL C: C. DeGrange <br /> 31 December 1987 EG0 i`CT14N DEPT. R. Queheillait <br /> D J. Blasy (DOES LSO <br /> v Chron File <br /> � <br /> vT At �{EALTH � <br /> ENVIROME.' . V1C�S <br /> FERM��(/5ER <br /> Mr. Robert 0. Godwin, Associate Director <br /> University of California L-a_ <br /> Lawrence Livermore National Laboratory <br /> P. 0. Box 808 <br /> Livermore, CA 94550 <br /> REPORT OF RECENT INSPECTION, UNIVERSITY OF CALIFORNIA, LAWRENCE LIVERMORE <br /> NATIONAL LABORATORY SITE 300, SAN "QUIN COUNTY <br /> The enclosed inspection report describes the 30 October 1987 meeting and <br /> inspection by Regional Board staff of Lawrence Livermore National Laboratory <br /> (LLNL) Site 300. <br /> At the meeting we discussed the draft Environmental Restoration Work Plan which <br /> was provided that day. We discussed some portions of the work plan at that <br /> time, and I subsequently provided detailed comments to Albert Lamarre of your <br /> staff by telephone on 4 November 1987. The final work plan, which was submitted <br /> 4 December 1987, is acceptable with one change which is discussed below. The <br /> work plan and time schedules should be updated in each Environmental Investi- <br /> gations Quarterly Report; please show the new and old versions for easy com- <br /> parison. <br /> One change needed in the work plan is in Task 12 concerning Pit b. According to <br /> Mr. Lamarre, LLNL implemented the recommendations in Brown and Caldwell ' s (B&C) <br /> July 1987 report by installing two new wells in the shallow alluvium near <br /> existing Wells EP 6-9 and K 6-1. Jur geologist has reviewed that report, and <br /> while we generally concur with B&C's conclusions and recommendations, we feel <br /> the ground water flow directions are not ciear on the pit' s west side. Ac- <br /> cording to our geologist, if the ground water follows the topography (the pit <br /> lies on a ridge) , the flow could be southwest as well as southeast. To check <br /> this possibility, a piezometer should be installed on the west side of the pit <br /> south of the fault, and the piezometric water levels reevaluated. <br /> Also, TCE has been found at high levels in two samples from Well BC-13 (100 ppb <br /> and 70 ppb; state action level for TCE is 5 ppb) . This is a shallow well <br /> monitoring a spring which discharges to the ground surface at a road cut. The <br />