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Rick Notini <br /> Page 2 <br /> S. The two peek a ed soil remedistian alternatives proposed an on site aeration and <br /> b[ot<eatment. Uncontrolled aeration of soils with greater than 50 ppm TPH-gus is no Ionger <br /> Allowed- Controlled aeration of soil with greater than 50 ppm-gas requires an air pollution <br /> perp k which is granted by the San Joaquin Valley Regional Air Pollution District, Please <br /> Provide more information regarding the biotreatment alternative utilizing X-19 for <br /> composting. <br /> 6. The imposed treouaent of smuW*ater contamination specified discharge to the Cky of <br /> Stockton sanitary sewer. According to Lang Williams,City of Stockton Municipal Utilities <br /> (November S, 1991 telecoammmicaoice) requests for discharge of groundwater to the <br /> sanitary sewer will be denied. The disposal of smindwater to the sanitary sewer will be <br /> abolished by a pending ordinance. Please sudmh an alternate disposal plan for treated <br /> groundwater. It may be necessary to discharge treated groundwater under a National <br /> Pollutant Discharge Elimination System MMM permit which is granted by the Central <br /> Valley Regional Water Quality Control Board (CVRWQCB). <br /> 7. The March 22, 1990 analysis of MW1 indicated fecal contamination, 1600 MPN. <br /> Monitoring of faced contamination has not continued. Initiate quarmrly kcal coliform <br /> analysis of each monitkxing wall within 50 feet of sanitary sewer lines. <br /> 8. <br /> The investigation performed byMoInUlder indicated that there were no known water supply <br /> Walls within 500 feet of the site. The Tri-Regional Reemmendations Appendix A-Reports <br /> states that the proxhaky►of private,municipal and mon wells within 2000 feet of the <br /> site are to be ideaffied. Pleas identify the location of wells widrin 2000 feet of the sfte. <br /> 9. Please submit a work plan for the investigation of background lead levels and the <br /> contamination associated with the former tank #2 located at 1325 West Weber by <br /> December 30, 1991. <br /> If you have any comments or questions,please contact May Meat's,EM, of my staff at {209)468-3441. <br /> Jog[Khanna,M.D.,M.P.N. <br /> Health Officer <br /> ��L�'✓1I-� r <br /> r A.Cole,REM, <br /> Lravironmmtal Hearth Division <br /> '' L.NG�MMcnr <br /> c: CVRWQCB-Elizabeth Thayer <br /> c: l3 arrest-Jeffery Rubin <br /> 1777 Botelho Drive; Walnut Creek, CA 94596.5042 <br />