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f <br /> 17 <br /> LATHROP PROPERTY <br /> `• WKA No. 1184.02 <br /> r January 30, 1992 <br /> Page 2 <br /> application for remediation of excavated soils (January, 1991 Application for <br /> Authorization of Uncontrolled Soils Aeration) <br /> • initial report of ground water quality and status of soils aeration(October, 1991 Interim <br /> Summary Letter) <br /> a successful completion of excavated soils remodiation(November, 1991 Completion.of. <br /> Soils Aeiatian) <br /> preparation of this report. <br /> I Report Form <br /> Although this document is entitled Problem Assessment Report (PAR), the Appendix A - <br /> "W,.- ` Reports format, prepared by the staff of the Central Valley Regional Water Quality Control <br /> Board ICVRWQCB) was not strictly followed,as certain guidelines presented in Appendix A- <br /> Reports do not apply to the subject property. We have, however, followed the Appendix A - <br /> Reports guidelines with respect to summarizing previous studies, tabulation of analytical <br /> results, mapping recommendations and other items. For consistency and comparative <br /> f..: purposes, our reports previously prepared for the property (itemized in italics in preceding <br /> section) can generally be considered equivalent to those reports typically completed unr'er <br /> Appendix A-Reports guidelines prior to issuance of a PAR, <br /> e-e <br /> E - <br /> Site Assessment Protocol <br /> # Subsurface soil borings during site characterization were accomplished with a truck-mounted <br /> Mobile B-53 drilling rig equipped with six-inch-diameter hollow stem augers; ground water <br /> monitoring wells were installed with a truck-mounted Mobile B-57 drilling rig equipped with <br /> ten-inch-diameter hollow stem augers. The exploratory soil borings were completed under <br /> -SJCPIiS Permit Nos. 90-1782 & 90-2149, and the ground water monitoring wells were <br /> installed under Permit No. 91-2243. A fourth permit issued for monitoring well construc.cion, <br /> No.90-3334,was not used,as Mr. Quaresma did not wish to retain the services of WESTER, <br /> the driller for which the unused permit had been issued. Ms. Ratliff observed backfilling of <br /> � � <br /> WALLACE-KUHL <br /> ErASSDVATES INC. - <br />