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Zmton Associates <br /> - 331 <br /> 1433 North Market Boulevard • Sacramento,California 95B34-19,L_- • (916) <br /> October 24, 1994 <br /> Project 0805-117.01 <br /> Mr. and Mrs. Miguel Guerrero <br /> 545 East Lodi Avenue <br /> Lodi, California 95240 <br /> Re: Authorization to Drill One Boring and Install One Vapor Extraction Well and Associated <br /> Pipeline on Parcel No. 57 of the San Joaquin County Assessors Map, Page 43 of Book 140 <br /> Dear Mr. and Mrs. Guerrero: <br /> At the request of ARCO Products Company(ARCO), EMCON Associates (EMCON) is conducting a <br /> subsurface environmental investigation at ARCO service station no. 760 at 225 South Cherokee Lane, <br /> Lodi, California. In conjunction with EMCON's on-site investigation, ARCO has requested that <br /> EMCON perform an off-site environmental investigation at nearby properties. <br /> This letter is to request authorization for EMCON and its subcontractors to drill one boring and install <br /> one vapor extraction well on your property, Parcel No. 57 of the San Joaquin County Assessor's map, <br /> page 43 of Book 140: the parcel is at the intersection of Cherokee Lane and Lodi Avenue, California, <br /> which is west of ARCO service station no. 760. <br /> It is EMCON's understanding from the city of Lodi Public Works Department that the alley located <br /> north of your property has been divided among adjacent property owners. That is, your property now <br /> extends to 10 feet from the limits of your previous property boundary to the alley. The environmental <br /> investigation EMCON proposes to conduct on your property will provide data on the condition of soil <br /> northwest of the ARCO station and comply with San Joaquin County Public Health Services <br /> requirements that hydrocarbons in soil be delineated. <br /> Enclosed are ARCO's License Agreement and three figures. Figure 1 is a generalized site plan showing <br /> features near ARCO service station no. 760. Shown on Figure 1 is the approximate location of the <br /> vapor extraction well EMCON proposes to install on your property. Figure 2 is a schematic well <br /> design showing the construction of a typical vapor extraction well installed by EMCON for projects <br /> throughout California. <br /> The vapor extraction well will be drilled using a truck-mounted drill rig with S- to 10-inch-ng will be installed in the boring. For safety and <br /> diameter <br /> augers. A 4-inch-diameter polyvinyl chloride casing <br /> security reasons, the top of the casing will be fitted with a locking cap and an aluminum cover with <br /> specially designed fasteners. The aluminum cover will be set approximately.25 inch above surrounding <br /> grade. The boring will take approximately 3 hours to drill, and the vapor extraction well construction <br /> will take approximately 4 hours. EMCON anticipates that the work will be completed in approximately <br /> 1 day. Two subcontractor personnel will operate the drill rig, and a geologist from EMCON will be <br /> SAC/PJM805\08051170.I AM-94 PAS:3 <br />