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STATE OF CALIFORNIA-Environmental Protecti8�gency 'i PETE WILSON,Govemor <br /> CALIFORNIA REGIONAL WATER QUALITY CON'FRIDL BOARDi HEALTH <br /> CENTRAL VALLEY REGION 'VICE <br /> 3443 Roeder Road,Suite A Q f AUG <br /> 2 7 PM 4: 3 1 <br /> Sacramento,CA 95827-3098 7 V <br /> PHONE:(916)255-3000 <br /> FAX:(916)255-3015 'rbA <br /> 23 August 1996 <br /> Mr. Nathan Esformes <br /> Triple F Produce <br /> P.O. Box 239 <br /> Tracy, CA 95378 <br /> GROUND WATER MONITORING PLAN, TRIPLE E PRODUCE FACILITY, TRACY, <br /> SAN JOAQUIN COUNTY <br /> I have reviewed the Ground Water Monitoring Plan submitted by Condor for the Tr- ,ie E <br /> Produce Corporation (Triple E) facility in Tracy. The plan is proposed to meet the requirements <br /> of Waste Discharge Requirements (WDRs) Order No. 96-118. As stated in the Order, the <br /> purpose of the monitoring plan is to identify procedures and wells to be monitored for measuring <br /> the effectiveness of achie ig plume containment and remediation. The monitoring plan is also <br /> to identify procedures and wells to be monitored for determining compliance with the disposal <br /> areas' ground water limitations. <br /> The proposed monitoring plan meets most of the requirements of the WDRs. However, Triple E <br /> must address the following comments. <br /> 4.0 Sampling Program <br /> Triple E must propose the analytical methods to be used in analyzing for trihalomethanes and <br /> standard minerals. <br /> 4.1.2 Well Purging <br /> The plan states that purge water generated from sampling monitoring wells MW-2 and MW-6 <br /> will be collected in a drum and then released to the aeration pond, since these two wells may <br /> have chloroform concentrations in excess of 50 µg/1. The plan proposes to discharge purge <br /> water from MW-1, MW-3, MW-4B, MW-5, and MW-7 to the ground surface. All purge water <br /> with detectable concentrations of any trihalomethane should be collected in drums and <br /> discharged to the aeration pond. <br /> 4.5 Monitoring for Ground Water Limitations <br /> Triple E proposes to use samples from MW-1 to indicate that ground water limitations <br /> downgradient of the spray field are not exceeded, by comparing trihalomethane (THM) <br /> concentrations in MW-1 through time and relating these concentrations to travel time from the <br /> apricot orchard spray field. The proposal does not adequately describe the procedures for <br /> determining compliance with Section C of the WDRs. <br />