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��J t' ' dew. <br /> �- <br /> ////APEX <br /> 13244 Pyrites Way Gold River, CA 95670 <br /> E N V I R 0 T E C H , INC . Phone 916.851.0174 Fax 916.851.flToll Free 1.800.242.4259 <br /> LINA\ <br /> July 31, 2002 O� ppr��S <br /> 'o"J <br /> Ms. Dot Lofstrom <br /> San Joaquin County Environmental Health Division <br /> P. O. Box 2009 <br /> Stockton, California 95201 <br /> Subject: Second Quarter 2002 Groundwater Monitoring Report <br /> Moore Petroleum Bulk Plant <br /> 5491 F Street, Banta, California <br /> Apex Project# ERA02.004 <br /> Dear Ms. Lofstrom: <br /> Apex Envirotech, Inc. (Apex), has been authorized by Moore Petroleum (Moore) to provide this <br /> report regarding quarterly groundwater monitoring conducted on April 30, 2002. The monitoring <br /> included collection of depth-to-water measurements and groundwater samples from monitoring <br /> wells MW-1 through MW-5, MW-7 through MW-12, recovery well RW-2, and vapor extraction <br /> well VEW-2, at the subject site (Figures I and 2). In addition, the domestic well at 5451 F Street <br /> was sampled monthly during the quarter. -MW-6 could not be located and was not sampled this <br /> quarter. <br /> BACKGROUND <br /> Apex began work on this project with the groundwater monitoring conducted on January 14, <br /> 1994. Prior to Apex, work conducted at the site included subsurface investigations and <br /> groundwater monitoring by Earth Treatment Systems, Inc., of Manteca, California; Delta <br /> Environmental Consultants, Inc., of Rancho Cordova, California; Nations Groundwater <br /> Associates of Sacramento, California; and Aegis Environmental, Inc. (Aegis), of Roseville, <br /> California. Site details may be found in the report titled, Quarterly Groundwater N.Ionitoring <br /> Report, dated April 18, 1991, submitted to Moore by Aegis. <br /> On May 5, 1995, a soil.vapor extraction (SVE) system consisting of an R.S.I. SAVE system was <br /> installed at the subject site. The vapor extraction system was installed per San Joaquin Valley <br /> Unified Air Pollution Control District (SJVUAPCD) permit conditions. The SVE system <br /> consisted of an internal combustion engine with catalytic converters mounted on the exhaust. <br /> The system was configured such that soil vapors could be extracted from either vapor well VEW- <br />