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y • • <br /> Formal Reply to October 18,2005 Phone Conversation <br /> Flag City New West#1003,6437 West Banner Street,Lodi,California <br /> Page 2 <br /> The costs are as follows based on a$0.19 per gallon disposal cost for clean water and 21 hours <br /> per day vacuum truck usage: <br /> • Baker tank rental $30.00/day $5,460.00 <br /> • Overflow prevention $2,000.00 $2,000.00 <br /> • Vacuum Trucks $110.00/hour $415,800.00 <br /> • Water Disposal $0.15/gal $777,600.00 <br /> TOTAL.......................................................................$1,200,860.00 <br /> Apex submitted a workplan dated October 17, 2005 proposing the installation of five extraction <br /> wells onsite and four additional offsite monitoring wells in the first three aquifer zones.to attempt <br /> to delineate the vertical and lateral extent of the MTBE groundwater plume. The dissolved phase <br /> MTBE plume emanating from the New West site was originally discovered in May 2004 when <br /> the Flag City Chevron site first sampled wells MW-19A and B located approximately 30 feet - <br /> south of the New West site. Apex has already sampled four wells that were installed as part of <br /> the initial investigation directed by Mr. Inf rma in his first written directive to New West dated <br /> July 15, 2005. These newly installed wells provided additional information regarding the <br /> dissolved phase MTBE plume but did not define it laterally or vertically. The four proposed <br /> offsite well permits have been submitted and are scheduled for installation once San Joaquin <br /> County Public Works issues the encroachment permit and SJCEH issues the drilling permits. <br /> Once these data from the proposed wells is received(expected by mid November), a better <br /> determination can be made as to lateral and vertical extent of the dissolved phase groundwater <br /> MTBE plume and the necessity of batch extraction can be better evaluated at that time. <br /> If you have any questions or comments, please call us at(916) 851-0174. <br /> Sincerely, <br /> APEX ENV/IROTEC`H, INC. <br /> ennifer Worsley f1" w t� <br /> Project Manager V::. <br /> - <br /> Irt1..,M11'/V/ <br /> Michael S. Sgourakis, R.G. <br /> Senior Geologist <br /> CRG No. 7194 <br /> cc: Mr. Michael Infurna, SJCEH, 304 East Weber Avenue, 3rd Floor, Stockton, California 95202 <br /> Mr. James Barton, CVRWQCB, 11020 Sun Center Dr. #200,Rancho Cordova, California 95670 <br /> Mr. Gil Moore, New West Stations, 1831 16`b Street, Sacramento, California 95814 <br />