Laserfiche WebLink
..- lir ! \ ' <br /> x � <br /> •} PROPOSED MEETING AGENDA <br /> CHAPIN BROTHERS INC <br /> 1766 Monte Diablo Ave <br /> Stockton, California <br /> Location San Joaquin County Public Health Services - Environmental Health Services �I , <br /> Date 29 January 1998 <br /> Attending Mr Russel Chapin - Property Owner/Responsible Party <br /> Mr Harlin Knoll and Ms Margaret Lagorio - PHS-EHD <br /> Mr William Little, Mr Robert Marty, Mr Nuel Henderson - <br /> Advanced GeoEnvironmental, Inc <br /> Proposed Discussion <br /> I Hydrocarbon concentrations in ground water at the site have decreased <br /> 2 Dissolved oxygen levels have increased in selected areas of the site, corresponding to the <br /> decline in hydrocarbons These relationships demonstrate the effectiveness of the IAS <br /> portion of the remediation system <br /> • 3 Since initiation of the SVE s stern an estimated <br /> y 316 gallons of gasoline have been removed <br /> SVE system has removed the major portion of the hydrocarbons from the exposed vadose <br /> soil zone in the SVE system's area of influence <br /> 4 However, soil contamination was documented to depths of twenty to twenty-five feet during <br /> the site assessment Water has risen to a depth of 15 feet This contamination remains in <br /> saturated soil in the core portion of the dissolved hydrocarbon plume <br /> 5 Benzene in extracted soil gas have been reduced to concentrations below the detection limits <br /> of the soil ,apor analytical method <br /> AGE recommends the following <br /> • Installation of additional IAS point or well approximately fifteen feet south of well MW4 <br /> to stimulate remediation of impacted ground water in southeastern quadrant of the <br /> remediation area <br /> • Reinitiate operation of ine SVE system for an additional quarter or until soil vapor <br /> sample concentrations cease to decline, indicating a point of diminishing returns and <br /> completion of effective remediation <br />