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` 06/14/96 FIJI 09:52 FAX 583 3282 ULTRAMAft <br /> uitramar <br /> ; Telecopy: 209.585-5685 Credit <br /> Ultramar,Inc. 209-583-3330 Adminiadative <br /> P.(].Box 486 209-5a3-33o2 Intormabon Services <br /> 525 W.Third Street 209.583-3356 Accounting <br /> Hanford,CA 93232-0466 <br /> (209)582.0241 <br /> June 14,1996 <br /> Mr. Mike inforna <br /> SanJ 9oa uin;County <br />} Environmental Health Department <br /> 445 North San Joquin Street JUN 14 1996 <br /> Stockton, California 95201 <br /> ENVIRONMENTALI110E <br /> HEALTH <br /> SUBJECT BEACON STATION NO.641,7210 EAST HAMMER LA W <br /> STOCKTON,CALIFORNIA <br /> �r <br /> 4 Dear Mr. Iaifurna: <br /> This correspondence is provided as per our telephone conversations of today <br /> 4 and yesterday. As we discussed, Ultramar will install 16-inch PVC conductor <br /> casings in selected locations within the UST area at the above-referenced <br /> Ultramar facility. The casings will allow drilling activities to be conducted in the <br /> UST area to assess the vertical extent of gasoline hydrocarbon impacted soil. In <br /> addition to the casings,we propose to install water, electrical, and air PVC <br /> conduits to five of the casingsto allow for vapor/ground-water extraction and <br /> air sparging if remediation becomes necessary. Installation of remediation <br /> equipment is not proposed at4his time. <br /> :i <br /> The casings will be located in the UST area as depicted on the enclosed drawing. <br /> A total of casings are proposed. Five of the casings will be used for <br /> assessment borings and possible remediation equipment,and five casing will be <br /> used for confirmation brings at a later date. A well box will be installed to the <br /> east of the west fuel islands. This box will allow for drilling activity to assess the <br /> lateral extent of impacted soil east of the UST area. No casing will be installed in <br /> { this box. Due to the installation of the west canopy over the east ends of the <br /> former UST's,it will be necessary to perform drilling activities in this area <br /> during the UST replacement project. A detailed workplan outlining all of the <br /> proposed drilling activity is being prepared and will be delivered to you for <br /> your review. <br /> 1 <br /> To accommodate the contractor's schedule for the UST project,it will be <br /> necessary to�perform the drilling activities by July 10,1996. Therefore,the <br /> workplan will be delivered to you by June 20, 1996. Upon your review of the <br /> workplan,please provide a reisponse by June 27, 1996. <br /> BEACON <br /> A Member of the Ultramar Group of Companies d1 Quality and Service <br /> E <br /> II . <br /> i ! <br />