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i • <br /> California Regional Water Quality Control Board <br /> `\- Central Valley Region 7 <br /> v Robert Schneider,Chair <br /> Linda Adams Sacramento Main Office Arnold <br /> Secreiaryfor 11020 Sun Center Drive#200,Rancho Cordova,California 956766114 Sehwarzenegger <br /> Environmental Phone(916)464-3291 •FAX(916)464-4645 Governor <br /> Proreclion hnp://wwwwaterboards.ca gov/centralvalley <br /> 20 October 2006 DECEIVED <br /> Cary Keaten ,,,''/MSI OCT 2 4 2006 <br /> City of Lathrop ERtER&KAIINOWSKI,INC. <br /> 16775 Howland Road <br /> Lathrop, CA 95330 <br /> WELL DESTRUCTION WORKPLAN, WDRs ORDER NO. R5-2006-0094, CITY OF <br /> LATHROP, SAN JOAQUIN COUNTY <br /> I have reviewed the 7 July 2006 Monitoring Well Network Modification prepared by <br /> Hydrofocus, Inc. and the 11 July 2006 Well Destruction Work Plan prepared by Erler & <br /> Kalinowski, Inc., which request authorization to properly destroy groundwater monitoring Well <br /> MWM-18. The request to destroy the well was delayed by preparation of new Waste <br /> Discharge Requirements Order No, R5-2006-0094. Until the new Order was prepared and <br /> adopted, staff could not judge the need for the well. <br /> The documents state the well was installed to monitor Land Application Area No. 17, that no <br /> wastewater was applied to the area, and the land will be developed and not used for <br /> wastewater application in the future. <br /> The land application areas were renamed as part of the 14 February 2006 Report of Waste <br /> Discharge. The new name for the area is Land Application Area A22. Area A22 is not listed in <br /> WDRs Finding No. 32, which lists all the land application areas presently acceptable for <br /> recycled water application. Similarly, Well MWM-18 is not listed in Finding No. 62, which lists <br /> all the groundwater monitoring wells presently included in the monitoring network, as defined <br /> by the WDRs. <br /> The workplan states the well will be over drilled and grouted using neat cement and a tremmie <br /> pipe, with San Joaquin County oversight. Destruction of the well as described in the Work <br /> Plan is acceptable. Please proceed with the permitting and well destruction. <br /> If you have any questions on this information please contact me at (916) 464-4616. <br /> TIMOTHY . O'BRIEN <br /> Waste Discharge to Land Unit <br /> cc: Margaret Lagorio, San Joaquin County Environmental Health Department, Stockton <br /> C. David Umezaki, P.E., Erler & Kalinowski, Inc., Burlingame <br /> California Environmental Protection Agency <br /> rZa Recycled Paper <br /> W\SualM,rcnTLnloqinLLallwp WW'IPMOPLMGU%[ulen Ul(klWEoc <br />