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i <br /> Emcon \Vol, <br /> 1433 North Market Boulevard •Sacramento,California 95834-1943• (916)928-3300• Fax(916)928-3341 <br /> June 23, 1997 <br /> Project 20805-142.007 <br /> Ms. Margaret Lagorio <br /> San Joaquin County Public Health Services <br /> Environmental Health Division <br /> P. O. Box 388 <br /> Stockton, California 95201 <br /> Re: Abandonment of Wells at ARCO Service Station No. 760, Located at <br /> 225 South Cherokee Lane, Lodi, California <br /> Dear Ms. Lagorio: <br /> At the request of ARCO Products Company (ARCO), EMCON has prepared this letter summarizing <br /> the proposed field activities associated with the abandonment of three monitoring wells (MW-1 <br /> through MW-3) and thirteen vapor extraction wells (VW-1 through VW-13) at the subject site (see <br /> Figure 1). Individual well construction details are presented in the attached table, and well locations are <br /> shown on Figure 2. Based on a letter from the San Joaquin County Public Health Services <br /> (SJCPHS) dated April 29, 1997, the SJCPHS indicated that no further action related to the <br /> underground storage tanks was required. In addition, SJCPHS indicated that the wells could be <br /> abandoned. <br /> EMCON will contract a licensed drilling contractor to abandon the sixteen wells. The wells will <br /> be decommissioned by pressure grouting each well from the total depth to the surface. The grout <br /> will consist of neat cement. A concrete seal will be placed at the surface. <br /> Please call if you have questions regarding the information in this letter. <br /> Sincerely, <br /> EMCON <br /> &444& CIsa:, <br /> PAYENT <br /> Claudio Avila J. R.GRECEIVED, <br /> . EI E <br /> Project Geologist Ge ogy Manager <br /> JUN 2 7 1997 <br /> Attachments: Table Groundwater Monitoring Data <br /> SAN J J:A.JUf ht GG%vN!'Y <br /> Figure 1 Site Plan PUBUC HE ALTH SERVi';ES <br /> Figure 2 Generalized Site Plan ENVIRONNIEN?AL HEAi<ri;rlviSioN <br /> cc: Paul Supple, ARCO Products Company <br /> Elizabeth Thayer, California Regional Water Quality Control Board <br /> SAC\N�PJM805\08051420.7AS-97\prz:1 <br />