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APEX <br /> E N V f R 0:T E C H I N C , 7844 Madison Avenue,Suite 106 • fair'Oaks,CA 95628 <br /> 1.800.242.5249 • Ph.916.535.0200 • fax 916.535.0207 <br /> r <br /> eu <br /> April 27, 2000 <br /> Mr. Jerry Moore <br /> Tom. <br /> Moore Petroleum f - <br /> 5491 F Street <br /> Banta, .California <br /> is Com- _ <br /> Subject: Workplan for Limited Subsurface Investigation and Pro osed Pilot Testing ' <br /> g p a <br /> k Former Moore Petroleum Bulk Plant <br /> 1 5491 F Street <br /> Banta, California "k <br /> Apex Project 4 ERA02.004 <br /> Dear Mr. Moore: <br /> Apex Envirotech; Inc. (Apex), is pleased to provide Moore Petroleum (Moore) this Workplan for <br /> limited subsurface investigation and proposed pilot testing at the subject site (Figure 1). This ' <br /> Workplan is�in response'to a letter.from San Joaquin County Environmental Health Division ; <br /> (County) dated March 9, 2000. A copy of this letter is presented in Appendix A. The proposed <br /> investigation includes: performing an updated off-site well search;,sarnple the off-site domestic <br /> -well towards the east; drilling four soil borings; convert three of the four soil borings into . <br /> groundwater,monitoring wells; collecting grounawater samples from each of-the three new wells; <br /> sample the existing nine monitoring wells (Figure 2); and perform a soil vapor extraction pilot <br /> test. The purpose of the investigation is to assess the lateral extent of etroleum,h drocarbons in <br /> p 1P g - p Y <br /> the shallow roundwater adjacent to the site and the.vertical extent in the area around MW-8 .' <br /> . g J <br /> (Figure 2). The purpose of performing the pilot test is to determine remediation alternatives in <br /> the area around well MW-8. , <br /> This report is based, in part, on information obtained from Moore Petroleum, and is subject to <br /> modification as newly acquired information may warrant. <br /> BACKGROUND .. <br /> Apex began work on,the project with the groundwater.-monitoring conducted on January 14, k <br /> 1994. Prior to Apex, work conducted at the site included subsurface investigations and t <br /> groundwater monitoring by Earth Treatment Systems, Inc., of Manteca, California; Delta. <br /> Environmental Consultants, Inc., of Rancho Cordova, California; Nations Groundwater - 1 <br />