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� Y • 1 <br /> o.•°�iN c <br /> PUBLIC HEALTH SERrICES �..�. ..o <br /> SAN JOAQUIN COUNTY Q <br /> JOGI KHANNA NLD..KP H <br /> Health OfficerP: <br /> P.O. Box 2009 • (1601 East Hazelton Avenue) 0 Stockton, California 95201 iE 6-it <br /> (209)468-3400 <br /> AUG 3 0 1991 <br /> CHUCK CARMEL <br /> ARCO PRODUCTS COMPANY <br /> P O BOX 5811 <br /> SAN MATEO CA 94403 <br /> RE: Village Arco 12133 IN REPLY REFER TO SITE CODE: 1021 <br /> 2908 W. Benjamin Holt Drive <br /> Stockton, CA 95207 <br /> San Joaquin County, Public Health Services, Environmental Health <br /> Division (PHS/EHD) has completed review of the report entitled <br /> "Draft Final Remediation Plan" prepared by Brown and Caldwell <br /> Consultants. The following comments are to be addressed in an/ <br /> addendum to the "Draft Final Remediation Plan. " <br /> Groundwater remediation was only considered within the plan. There <br /> was no mention of remediation of the soil contamination associated <br /> with the site. Soil remediation must be included in the Final <br /> Remediation Plan. <br /> Soil contamination throughout the site was detected by Western <br /> GeoEngineers and reported in the April, 1987 report entitled <br /> "Gasoline/Soil Vapor Concentrations. " According to registered <br /> geologists with Western GeoEngineers "Most of the product seems to <br /> have been forced out of the tank fill and into the sand below the <br /> clay (below the 8.5 foot level) . There are some areas where the <br /> product appears to have migrated along the top of the clay, at the <br /> 6 foot level. " <br /> In the October, 1987 report entitled "Soil Sampling Results" <br /> prepared by Brown and Caldwell, the soil contamination associated <br /> with the former leaking 550 gallon waste oil tank was recommended <br /> to "be treated as part of the entire hydrocarbon problem at the <br /> site. " However, this contamination has never been addressed. <br /> Soil remediation alternatives, in-situ aeration and soil venting, <br /> were presented in the June, 1987 "Problem Assessment Report" <br /> prepared by Brown and Caldwell, yet neither have been proposed in <br /> the "Draft Final Remediation Plan. " <br /> Within the "Problem Assessment Report" is found Figure 1-2 "Plot <br /> Plan and Underground Utility Locations. " This figure locates a <br /> septic tank line, a septic tank, and two eighty foot leach lines as <br /> well as a future sanitary sewer line. Septic systems are conduits <br /> A Division of San Joaquin County Health(are Scrvices �� <br />