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4�N <br /> STATE OF CALIFORNIA - Environmental Protr Agency PETE WILSON, Governor <br /> CALIFORNIA REGIONAL WATER QUALITY CONTROL BOARD <br /> CENTRAL VALLEY REGION <br /> 3443 Routier Road, Suite A <br /> Sacramento, CA 95827-3098 <br /> PHONE: (916) 255-3000 <br /> FAX: (916) 255-3015 <br /> 1 June 1994 -J U N 0 3 1994 <br /> ENVIRONMENTAL HEALTH <br /> PERMIT/SERVICES <br /> Mr. Nick Nickerson <br /> Unocal Corporate Environmental Remediation & Technology v?.40 <br /> 2000 Crow Canyon Road, Suite 450 <br /> --Sani-Ramon,-CA- 94533o2/3o G[/ <br /> FORMER PUREGRO FEED FACILITY, PORT OF STOCKTON <br /> Thank you for meeting with me today to discuss the investigative work conducted to date at <br /> the former PureGro feed facility on West Washington Street within the Port of Stockton. <br /> Staff feel that the soils have been fully characterized with respect to concentrations of feed <br /> products and fertilizer. The 12 May 1994 soils investigation report summarizes all of this <br /> data. <br /> Four monitoring wells were installed and sampled.in December, February, and May. The <br /> j results show nitrate contamination in the upgradient well, but no nitrogen contamination in <br /> the other three wells. For each of these three monitoring events, the groundwater gradient <br /> has been to the west. Unfortunately', none of the four monitoring wells are in a <br /> downgradient position. . Therefore, you are hereby;;requested to install a fifth monitoring well <br /> at the site. As discussed today, the general location of the well is to be at the west-northwest <br /> portion of the property; however, the exact placement depends on the existence of <br /> underground utilities. <br /> By 30 June 1994 please submit a short workplan and timeline for installation and surveying <br /> of the'new`monitoring`wel"'We-expect-that tie weil should"be in-place in time`for the �- <br /> August quarterly monitoring event. The new well should.be sampled for the same <br /> constitutents as the existing wells. <br /> If you have any questions, I can be reached at (916) 255-3104. <br /> WENDY WYELS <br /> Ag Regulatory Unit <br /> E <br /> ) <br /> C6: Mr. Michael Infurna; San Joaquin County Environmental Health, Stockton <br /> Ms. Charlene Wall, Port of Stockton, Stockton € <br /> Mr. Jack Holm, Cargill, Stockton I <br /> Mr. John Rapp, Sierra Pacific Consultants, El Dorado Hills <br /> I <br /> i <br />