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California Regional Water Quality Control Board <br /> Dr.Alan Lloyd Central Valley Region <br /> Secretaryfor Arnold Schwarzenegger <br /> Environmental Robert Schneider,Chair Governor <br /> Protection: 245 2Hf](�gdn'T C_e er j) e(3�� <br /> 20 cho Cordova,CA 95670-6114 <br /> (916)464-3291 •Fax(916)4644775 <br /> ..http:#n",iiro6.ca.gov/rwqcb5 <br /> EN !rZ0NIMElITAL <br /> HEALTH DEP°,PTMENT <br /> 4 October 2005 <br /> Ms. Sandra Glenn <br /> MonierLifetile <br /> 3511 N. Riverside Ave. <br /> Riato, CA 92377 <br /> SEMI-ANNUAL 2005 GROUNDWATER MONITORING REPORT, JUNE 2005, LATHROP <br /> AND FRENCH CAMP FACILITIES, MONIERLIFETILE LLC., SAN JOAQUIN COUNTY <br /> (CASE NO. 4503) <br /> We have reviewed the Semi-Annual Groundwater Monitoring Report June 2005 submitted on 19 <br /> September 2005 for MonierLifetile's Lathrop and French Camp Facilities. The enclosed Monitoring <br /> Report Compliance Checklists summarizes our comments on the report. The report is complete. <br /> In recent monitor events weathered diesel has been detected in groundwater at both the Lathrop and <br /> French Camp facilities. Over the past year diesel concentrations in FCW-1 have increased to 3100 <br /> ppb; diesel concentrations at LPW-1, -2, and—3 are 570, 470 and 260 ppb respectively. A workplan <br /> with time schedule to investigate the extent of diesel impacts to soil and groundwater underlying the <br /> waste tile stockpiles should be submitted by 15 November 2005. The time schedule should plan to <br /> complete the investigation and submit a report of the findings by 15 February 2006. <br /> Revised Cleanup and Abatement Order No. 5-01-722 requires clean closure of Lathrop and French <br /> Camp tile waste piles by 30 June 2006. Clean closure requires removal of all waste and any soil <br /> containing waste constituents beneath the waste piles. <br /> If you have any questions please call me at (916) 464-4614. <br /> Ross D. Atkinson <br /> Associate Engineering Geologist <br /> CC. Mr. Mike Huggins, San Joaquin Enviromnental Health Department, Stockton <br /> Ms. Linda Conlan, Geomatrix Consultants, Inc. Newport Beach.. <br /> RDA;C:Unydocuments\moniertile\2q_051tr <br /> California Environmental Protection Agency <br /> Cc1 Recycled Paper <br />