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AL rt !_i 11 <br /> Cal/EPA 'F;I`, ; l_ Pete Wilson <br /> Governor <br /> December 8, 1997 97 DEC 15 PM 1: 13 <br /> State Water <br /> Resources <br /> Control Board <br /> Division of Carl Knowles <br /> Clean Water Harold Knowles <br /> Programs 1140 Hammer Ln W <br /> Stockton, CA 95209 <br /> Mailing Address: <br /> P.O.Box 944212 <br /> Sacramento,CA <br /> 94244-2120 PRE-APPROVAL OF CORRECTIVE ACTION COSTS,CLAIM NO. 7881, <br /> SITE ADDRESS: 102 WILSON WAY S,STOCKTON,CA 95205 <br /> 2014 T Street. <br /> Suite 130 <br /> Sacramento.CA I have reviewed Environmental Closures request, received on November 19, 1997, prepared and <br /> 95814 submitted on your behalf for pre-approval of additional operation and maintenance costs for <br /> (916)227-6010 <br /> FAX(916)2274530 performing previously pre-approved soil vapor extraction system by Ground Zero. Based on Ground <br /> Zero's cost proposal dated November 14, 1997, the total pre-approved amount is 54967. The <br /> World Wide Web <br /> ht[p://wwwswrcb.ca. reduction in the proposed costs is from the laboratory rates. The acceptable and reasonable rate for <br /> gov/-cvvphome/ the analyses of TPHg/BTEX is $80(included 15% markup) per sample. <br /> rundhome.htm <br /> Additionally,the costs for sampling and analyzing of the influent and effluent streams should be <br /> included in all future cost estimates including bid proposals. In this profession. <br /> consultants/contractors must realize that PID readings are used as screening tools and cannot be <br /> relied upon for actual vapor concentrations or to evaluate the effectiveness of the vapor extraction <br /> system. To obtain necessary data accurately, you need to consider the required laboratory analyses <br /> in your treatment processes and also to comply with the air district's requirements. Future cost <br /> submittals without this consideration will not be reviewed and return unprocessed. <br /> Please call if}ou have any questions. I can be reached at(916)227-6010. <br /> Sincerely, <br /> t <br /> Teresa Trinh. Water Resources Control Engineer <br /> Technical Review Unit <br /> Underground Storage Tank Cleanup Fund <br /> cc: <br /> Ms. Margaret Lagorio <br /> San Joaquin County EHD <br /> P.O. Box 2009 <br /> Stockton, CA 95201 <br /> Our mission is to preserve and enhance the quality of California's water resources,and <br /> r�a� Reryrled Paper ensure their proper allocation and efficient use jar the benefit of present and future generations. <br />