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Mr. Dave Henry • • Project AE5701 <br /> June 5, 1998 Page 4 <br /> The area in which the recently excavated petroleum-impacted soils were stockpiled was <br /> marked using spray paint. Groundworks recommended to DSS that these soils be <br /> placed on plastic sheeting, and securely covered with plastic sheeting adjacent to the <br /> impacted soils already stockpiled on site, for subsequent characterization and proper <br /> disposition. <br /> Recommendations <br /> Based on the information obtained, current regulatory guidelines, and the judgment of <br /> Groundworks, the following recommendations are made. <br /> • Groundworks recommends that the appropriate parry contact the regulatory <br /> agencies to determine the likelihood that the stockpiled soils could be used as <br /> fill on site beneath the pavement of the D'Arcy Parkway extension. The <br /> option for using the soils on site would conceptually consist of distributing <br /> the impacted soils as fill in a lift below the D'Arcy Parkway extension. It is <br /> anticipated that the regulatory agency, if amenable to this proposal, would set <br /> an upper limit for allowable concentrations of TPHd in soils to be used on <br /> site. <br /> • Composite samples of the excavated materials should be collected and <br /> analyzed. If off-site disposal is necessary, a more rigorous sampling and <br /> analysis program may be required. <br /> • The appropriate regulatory agency should be contacted, and the requirement <br /> for further investigation, if any, should be ascertained. <br /> Groundworks Environmental, Inc. AE5701.DOC <br />