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r <br /> California Regional Water Quality Control Board :^ <br /> Central Valley Region <br /> Winston H. Hickox <br /> Robert Schneider,Chair Secretary for Gray Davis <br /> Sacramento Main Office Governor <br /> Environmental Internet Address: http://www.swrcb.ca.gov/rwgcb5 <br /> Protection 3443 Routier Road,Suite A,Sacramento,California 95827-3003 <br /> Phone(916)255-3000-FAX(916)255-3015 <br /> 13 August 2003 <br /> W. Michael Carroll <br /> San Joaquin County Department of Public Works <br /> Solid Waste Division <br /> P.O. Box 1810 <br /> Stockton, CA 95201 <br /> HARNEYLANE SANITARYLANDFILL Q UAR TERL Y/ANNUAL 2002 AND QUARTERL Y2003, <br /> GROUNDWATER AND SURFACE WATER MONITORINGREPORTS, SAN JOA QUIN COUNTY <br /> FACILITYID 5B390308002 <br /> We have reviewed the Harney Lane Sanitary Landfill monitoring reports as follows: 3`d Quarter 2002, 4"' <br /> Quarter/Annual 2002, 1st Quarter 2003 and 2nd Quarter 2003. The facility is regulated under Waste Discharge <br /> Requirements (WDRs) Order No. 96-139. We have received the Resubmittal of Progress of Corrective Action <br /> Measures Report dated 31 January 2003 by letter dated 4 February 2003. A comprehensive review of the <br /> county's interpretation of the data in the Corrective Action Measures Report will be submitted separately. <br /> All reports include a generic Sampling and Analysis Plan (SAP) in an Appendices. It is not clear whether the <br /> purging method using the Well Wizard is a dedicated pump for each well or if one pump is used at all wells. In <br /> this regard, Board staff find it difficult to review individual monitoring reports for all the County landfills <br /> because of the generic SAP is recopied in each monitoring report. Please include additional statements in the <br /> reports discussing the SAP for each individual landfill for clarity. The quarterly reports are consistently <br /> disorganized with regards to figures in the SAP. Please ensure that this mistake is corrected for all future reports. <br /> Furthermore, the language in each document seems to be copied from the previous reports and do not reflect an <br /> updated interpretation of the new data. <br /> Because this landfill is in corrective action, we expect that the quarterly reports include a simple evaluation of the <br /> data to show whether constituents of concern (COCl) and monitoring parameters are changing and why. An <br /> evaluation should not only include the noted changes, but an explanation of why the changes are occurring or <br /> how the County intends to investigate the circumstances (i.e., increasing concentrations of constituents in surface <br /> water in the upgradient and downgradient samples). Further explanation of the type of statistics used to <br /> determine whether a constituent is increasing or decreasing should be included in that section in support of the <br /> conclusion(s) or observation(s). At the minimum, the next quarterly report should address the noted changes <br /> from the previous quarter or state that the more comprehensive semi-annual report will address the statistical <br /> changes or observations. <br /> Please respond to comments in this letter and the attached Monitoring Report Compliance Checklists 1CP <br /> subsequent monitoring reports, as applicable. , <br /> 5 Fn <br /> .. rn <br /> CA <br /> California Environmental Protection Agency <br /> Vic?Recc•cled Paper <br /> The energy challenge facing California is real. Every Californian needs to take immediate action to reduce energy consumption. <br /> Por a list of simple ways you can reduce demand and cut your energy costs,see our Web-site at http:./www.swrcb.ca.gov,n�geb> <br />