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i <br /> California Regional Water Quality Control Board -` <br /> Central Valley Region o <br /> Robert Schneider,Chair <br /> Terry Tamminen Arnold Schwarzenegger <br /> Secretary for Sacramento Main Office Governor <br /> Environmental Internet Address: http://www.swrcb.ca.gov/rwgcb5 <br /> Protection 11020 Sun Center Drive#200 Rancho Cordova,CA 95670-6114 <br /> Phone(916)464-3291 <br /> LCEs FO) <br /> 2 March 2004 <br /> W. Michael Carroll 2004 <br /> San Joaquin County Dept. of Public Works ENVIRONMENT HEALTH <br /> Solid Waste Division PERMIT/SERVICES <br /> P.O. Box 1810 <br /> Stockton, CA 95201 <br /> REVIEW OF 1sT, 2ND,AND 3P QUARTER 2003 MONITORING REPORTS, CORRAL <br /> HOLLOW SANITARY LANDFILL, SAN JOAQUIN COUNTY,WDID 5B390307001 <br /> We have reviewed the Corral Hollow Sanitary Landfill, 1", 2"d, and 3r`I Quarter 2003 Groundwater and <br /> Surface Water Monitoring Reports. Based on our review, we find the reports comply with Waste <br /> Discharger Requirements Order No. 5-01-176. <br /> Data show that there are increasing concentrations of inorganic constituents in monitoring wells, as well <br /> as increasing VOCs in MW-5 (impacted well). The current remediation system includes a landfill gas <br /> collection and flare system. As stated in the attached Monitoring Report Compliance Checklist, this <br /> system does not remediate inorganic constituents in groundwater; therefore, concentration limits for <br /> inorganic analytes must be developed for MW-5. <br /> The format of Table 1 (see Reports), should be changed to reflect the latest concentration limit for each <br /> constituent of concern (COC). As an example, when the statistical evaluation shows that nitrate is <br /> statistically increasing a new limit is not recalculated and the result in Table 1 is a NE [2]. When this <br /> occurs, Table 1 should reflect the latest calculated concentration limit for comparison. <br /> Please address areas of concern noted in the attached Monitoring Report Compliance Checklist in <br /> subsequent reports. <br /> If you have any questions, contact me at 916-464-4737. <br /> r <br /> KINe <br /> A. SCHWAB, R.G. <br /> Engineering Geologist <br /> Enclosure <br /> cc: Robert McClellon, San Joaquin County Environmental Health Department, Stockton <br /> Keith Kennedy,Permitting and Enforcement Division, CIWMB <br /> Kas:CorralH 1,2,3Q 2003 1tr.doc <br /> California Environmental Protection Agency <br /> �a Recycled Paper <br />