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tr <br /> '*-nemoranaum �-' <br /> CALIFORNIA REGIONRL WATER OURLITY CONTROL BORRO • CENTRRL URLLEY REGION <br /> 3443 Routier Road Phone: (916) 361-5600 <br /> Sacramento,California 9582773098 ATS5: 8-495-5600 <br /> TO: Ton Vorster - FROM: Gordon Lee Boggs <br />._ (Laurie Cotulla Underground Tank <br /> Diane Hinson Program coordinator <br /> Dave Carls, SMD) <br /> DATE: 22 June 1988 SIGNATURE: <br /> SUBJECT: COMMMENTS ON WORKPLANS FOR SAFEWAY, 1111 NAVY DR. , <br /> STOCKTON; ROBERTS OIL, LODI; TRI VALLEY GROWERS, <br /> THORNTON; SOUTHLAND (7-11), GRANTLINE, TRACY; UNOCAL, <br /> 4707 PACIFIC AVE., STOCKTON; AND GENOVA BAKERY,STOCKTON; <br /> Safeway, ilii Navy Drive Stockton <br /> Joe Theissen of Weiss Associates called on 20 June 1988 about the <br /> monitor well placement and soil excavation need in order to leave the <br /> Underground Tank (UT) concrete cradle in place. Because MW 3 and <br /> Boring 2 show that the area is interspersed with sand layers, it is not <br /> easy to determine the movement of the diesel at the site. We also <br /> E decided that to put MW 4 on the downgradient side of the cradle would <br /> duplicate what they have now and would be too far away for a point <br /> Of compliance. Therefore, Weiss will submit an amended workplan <br /> that will place MW 4 closer to the source of contamination and better <br /> define how the excavation of the site will take place. Boring 2 showed <br /> contamination at 20.7 feet which is three feet below the current water <br /> level. They also must explain that and determine how the excavation <br /> Will accomodate the removal of the contaminated soil above and below <br /> the water table. The placement and rationale for MW 4 is to be <br /> included. <br /> Roberts Oil Lodi <br /> Kent Parish of Ensco (formerly Exceltech) called on 21 June to discuss <br /> their proposal to begin work at the Roberts Oil site. The last work was <br /> done in 1985 by Kleinfelder Associates. Atter talking to Laurie Cotuila <br /> later in the day, we both were unaware that Ensco had begun work <br /> about a month ago. Kent is to prepare a workplan according to the <br /> Regional Board reporting guidelines. Copies of the new guidelines and <br /> the 1,2,5 investigation recommendations also were sent to Kent. <br />