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LM 2801 West Lane,Stockton May 2005 �. Page 2 L. The screened intervals, completed depths, filter pack intervals of DMW-1 to DMW-7 included in Table 1 "Monitoring Well Construction Results"of the reports and previous quarterly sampling reports appeared to be incorrect The numbers in Table 1 are contrary to L. the numbers reported in Table 1 of Closure Request Report dated July 2001 prepared by URS, i quarterly sampling field records, and EHD official inspection reports at the time of well ' construction. Please review the original well logs and make any necessary corrections to Table 1 in all future reports. URS had previously submitted to EHD a well survey in Section-3.2 and Appendix A of the LM above-mentioned Closure Request Report. URS reported in Section 3.2 that only one domestic well completed to 125 feet bsg within 2,000 feet south of the site. Appendix A,comprised of a table and a map,identified 27 wells in the area. The radius of the circle on the map was not specified,but the radius of the circle appeared to far exceed 2,000 feet. Sincea distance scale was not provided on the map,it is not known which wells.labeled on the map are actually within 2,000 feet of the site. Also,the specific domestic well discussed in Section 3.2 could not be identified on the map or table. According to the-well-survey of the L" neighboring property, San Joaquin Catholic Cemetery,multiple private drinking and- irrigation wells existed at the cemetery and St Joseph's Hospital. None of these wells was identified or labeled on the well survey in Appendix A. Since the Harding Cemetery is �+* located immediately adjacent to the site,it is likely many of these wells exist within 2,000 of the site. The well survey in Appendix A is therefore potentially underreported. Submit a comprehensive 2,000-foot well receptor survey to EHD or demonstrate the adequacy of the �.. existing report by June 15,2005. The well survey should include a properly labeled map with distance scale and a 2,000-foot radius map,a list of the identified wells with ' corresponding addresses and well construction log. Reliance solely on reviews of Water Well Drillers Reports at the California Division of Water Resources may be inadequate. Conduct a door-to-door well survey if required. A complete well survey with all wells existing within 2,000 feet of the site is required before a site can be considered for No L Further Action status. Donna Heran,RENS,Director V Environmental CSrenpior Health Department Jeffrey Wong REHS Nuel C.Henderson,Jr_,RG LOP/Site Mitigation Unit N LOP/Site Mitigation Unit IV Ze c: URS Corporation—Anthony Mindling,RG c: RWQCB,Central Valley Region—James Barton,RG 1.. L _ F t L 1