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PUBLICIIEALTH SERVICES <br /> SAN JOAQUIN COUNTY <br /> ENVIRONMENTAL HEALTH DIVISION <br /> Ernest M. Fujimoto, M.D., M.P.H., Acting Health Officer <br /> 445 N. San Joaquin Street • P.O. Box 388 • Stockton, CA 95201-0388 <br /> (209) 468-3420 <br /> CHUCK CARMEL <br /> C(DPY <br /> ARCO PRODUCTS COMPANY <br /> P O BOX 5811 <br /> SAN MATEO CA 94402 LIAR 2 4 1994 <br /> Re: Village ARCO #2133 Site Code: 1021 <br /> 2908 West Benjamin Holt <br /> Stockton CA 95207 <br /> San Joaquin County Public Health Services, Environmental Health Division (PHS/EHD) <br /> has completed review of the "Fourth 1993 Quarterly Report" and the "Soil Vapor <br /> Extraction, Air Sparge, and Groundwater Monitoring Well Installation" report both dated <br /> March 10, 1994 and prepared by Brown and Caldwell (BC). PHS/EHD has the following <br /> comments for your consideration. <br /> Between October 11, 1993 and October 19, 1993, two monitoring wells (MW1 - MW2) <br /> six air sparge wells (S1 - S6) and seven soil vapor extraction wells (V1 - V7) were <br /> installed. Soil samples were collected for laboratory analysis during the installation of <br /> most wells, at varying depths, with the exception of S3, S6, V2, V3, and V4. The soil <br /> data obtained aided in the definition of soil contamination. However, the extent of soil <br /> contamination to the northeast, east, southeast, south, and southwest remains undefined. <br /> The report indicated that MW1 and V7 were continuously cored. Please provide cross <br /> sections of the lithology encountered. <br /> The soil cuttings generated during drilling and the subsequent well development water <br /> were transported off site. Please submit disposal documentation for this contaminated <br /> material. <br /> The monitoring wells were sampled on November 9, 1993. The newly installed <br /> monitoring wells, MW1 and MW2, aided in the definition of groundwater contamination <br /> associated with the site. However, the groundwater contamination to the southwest and <br /> south of the site remains undefined. PHS/EHD has repeatedly requested information <br /> and indication that negotiations with neighboring property owners to the south were <br /> underway. Please provide PHS/EHD with evidence to suggest that efforts to gain access <br /> to drill an off site well continue. <br /> A Division of San Joaquin County Health Care Service. <br />