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1 T <br /> 11 7 <br /> Mr. Michael J. Pudil <br /> Page 2 <br /> February 19, 1999 <br /> 10. "Phase II Investigation Work Plan,"prepared by Barr Engineering,dated May 1, 1998; <br /> 11. "Operation and Maintenance Plan, Ground Water Monitoring and Remediation System, <br /> prepared by PEER,dated May 1, 1998; <br /> 12. "Special Discharge Report- Second Quarter 1998,"prepared by PEER,dated July 17, 1998; <br /> 13. "Semi-Annual Ground Water Monitoring Summary Report,"prepared by PEER,dated <br /> July 17, 1998; <br /> 14. "Remedial Action Plan,"prepared by Barr,dated September 1, 1998; <br /> 15. "Receptor Survey Results,"prepared by PEER,dated September 18, 1998; and <br /> 16. Various correspondence and monitoring submittals in the MPCA Site file. <br /> In 1987, Washington Scientific Industries Inc. (WSI)identified chlorinated solvents in the soil <br /> and ground water at the Site on the south portion of its facility during the construction of a <br /> parking lot expansion. In 1988, WSI installed a ground water pump-out system as a remedy <br /> under the MPCA Resource Conservation and Recovery Act(RCRA)Corrective Action Program. <br /> Since that time, WSI has continued to operate the ground water remediation system and submit <br /> periodic ground water monitoring reports. In a letter dated June 29, 1998, Sarah Halvorson of <br /> Lindquist&Vennum,P.L.L.P. requested on behalf of WSI that MPCA oversight of the ground <br /> water response actions and monitoring continue under the administrative oversight of the VIC <br /> Program. A letter from the MPCA RCRA project staff on August 10, 1998,effectively <br /> transferred continuing oversight of the project to the VIC Program. <br /> In response to a request by the MPCA RCRA project staff, WSI has prepared and submitted the <br /> "Receptor Survey Results"(the Report),to address questions regarding the location and <br /> construction of private ground water supply wells in the vicinity of the Site. The Report also <br /> presents a conceptual work plan for installing a ground water sentry well between the Site source <br /> contamination and the downgradient residential properties and for working towards a phased <br /> shutdown of the ground water pump-out system. <br />