Laserfiche WebLink
PUBLIC TEALTH SERVICES <br /> SAN JOAQUIN COUNTY a <br /> ENVIRONMENTAL HEALTH DIVISION <br /> Ernest M. Fujimoto, M.D., M.P.H., Acting Health Officer <br /> ��FOR <br /> 445 N. San Joaquin Street • P.O. Box 388 • Stockton, CA 95201-0388 <br /> (209) 468-3420 <br /> BRETT HUNTER �' '` ' <br /> SPR 0 7199 <br /> ENVIRONMENTAL ENGINEER <br /> CHEVRON USA <br /> PO BOX 5004 <br /> SAN RAMON CA 94583-0804 <br /> RE: Lincoln Village Chevron Station #9-4275 SITE CODE: 1952 <br /> 2905 West Benjamin Holt <br /> Stockton CA 95207 <br /> San Joaquin County Public Health Service, Environmental Health Division has reviewed <br /> the "Problem Assessment Report/Feasibility Study" dated March 16, 1994 and prepared <br /> by Groundwater Technology. PHS/EHD has the following comments for your <br /> consideration. <br /> The results of the preliminary assessment of soil and groundwater contamination were <br /> included in the Problem Assessment Report (PAR). The extent of groundwater <br /> contamination associated with the site has been basically defined with the exception of <br /> the southern area of the site where there may possibly be groundwater contamination co- <br /> mingling with the groundwater contamination associated with the ARCO station located <br /> at 2908 West Benjamin Holt to the south of the site. The physical boundaries of soil <br /> contamination are not well define as a majority of the data was obtained using vapor <br /> surveys. <br /> The PAR discussed various remedial alternatives including: source removal (excavation) <br /> and monitoring; bio-sparging; vapor extraction; and air sparging with vapor extraction. In <br /> all cases it was recommended that additional soil investigation be performed to further <br /> characterize the extent of soil contamination. The PAR also indicated that feasibility <br /> studies would be necessary to evaluate the effectiveness of the following remedial <br /> alternatives: bio-sparging, vapor extraction; and air sparging with vapor extraction. <br /> The PAR indicated that the seemingly most cost effective alternative was bio-sparging. <br /> This technology has had limited application and therefore, it is unclear whether this <br /> technology will prove both cost effective and successful for remediation of the soil and <br /> groundwater contamination evidenced at the site. <br /> A Division of San Joaquin County Health Care Services <br />