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- -MENI Ir <br /> r - - - _ 'Jr`� v <br /> i <br /> w a <br /> F� <br /> {s <br /> 4gf <br /> F•+ <br /> May 15, 1991 <br /> Ms. Margaret Lagorio <br /> San Joaquin County Public Health Seivices <br /> Environmental Health Division <br /> Post Office Box 2009 <br /> 445 North San Joaquin Street <br /> Stockton, California 95201 <br /> Subject: PROPOSED WORK PLAN FOR LIMITED ADDITIONAL SITE <br /> ASSESSMENT <br /> MOORE PETROLEUM, INC. <br /> (Frank's Exxon #2) <br /> 1399 East Yosemite Avenue, Manteca, California <br /> Dear Ms. Lagorio: <br /> Aegis Environmental, Inc. (Aegis), proposes the following work plan to conduct a Limited <br /> Additional Site Assessment at the subject site (Figure 1). The purpose of the proposed <br /> work plar�is to further define the lateral and vertical extent of petroleum hydrocarbons in <br /> soil and groundwater beneath the site. The site investigation would include the drilling <br /> and sampling of two soil borings to be completed as groundwater monitoring wells MW-4 <br /> and MW-5. Additionally, it is proposed to reconstruct the existing MW-1A as a <br /> 6-inch-diameter groundwater monitoring/vapor extraction well by over-coring and <br /> -� reconstruction. <br /> The proposed work is based on a detailed review of prior work performed at the site by <br /> -� previous consultants and recent groundwater monitoring (Aegis Quarterly Monitoring <br /> Report, dated April 15, 1991)• Further information was provided to Aegis by the San <br /> Joaquin County Public Health Services Department (SJCPHSD) and Moore Petroleum, <br /> �- Inc. This work plan is subject to modifications as newly acquired information may <br /> warrant. The work will be performed in accordance with the guidelines and <br /> recommendations of the San Joaquin County Public Health Services Department, the Tri- <br /> Regional Staff Recommendations for Initial Evaluation and the Leaking Underground Fuel <br /> Tank (LUFT) Manual. <br /> 1 - 90-048A.WPN <br />