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r <br /> APEX <br /> 7644 Madison Avenue,Suite 106 • Fair Oaks,CA 95628 <br /> E N V I R 0 T E C H , I N C . 1.800.242.5249 • Ph.916.535.0200 • Fax 916.535.0207 <br /> January 12, 1999 <br /> Mr. Jerry Moore <br /> Moore Petroleum, Inc. <br /> 5491 "F" Street <br /> Banta, California 95304 <br /> Subject: Fourth Quarter 1998 Groundwater Monitoring Report <br /> Moore Petroleum, Inc. <br /> 5491 "F" Street,Banta, California <br /> Apex Project No. ERA02.004 <br /> Dear Mr. Moore: <br /> Apex Envirotech, Inc. (Apex), is pleased to provide Moore Petroleum,Inc. (Moore Petroleum), <br /> this report documenting the results of the quarterly groundwater monitoring conducted on <br /> December 12, 1998, at the subject site(Figure 1). The monitoring included collection of depth- <br /> to-groundwater measurements and groundwater samples from monitoring wells MW-1 through <br /> MW-3 and MW-5 located on site (Figure 2). <br /> This report is based, in part, on information obtained from Moore Petroleum Inc., and is subject <br /> to modification as newly acquired information may warrant. <br /> BACKGROUND <br /> Apex began work on the 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 a"Quarterly Groundwater Monitoring Report," dated <br /> April 18, 1991, submitted to Moore Petroleum by Aegis. <br /> On May 5, 1995, a soil vapor extraction 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 vapor extraction <br /> system consists of an internal combustion engine with catalytic converters mounted on the <br /> f exhaust. The system was set up such that soil vapors could be extracted from either vapor well <br />