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Building 201 Update : <br /> Diesel contamination was caused by a 550 gallon diesel <br /> storage tank . Excavation was performed down to 18 feet . <br /> Non-detect levels of contamination was reached in both north <br /> and south trench ends . The east/west trenches still show <br /> high contaminant levels . The gravel layer below the tank <br /> was contaminated with diesel . <br /> COE to contract for soil borings and a monitoring well . <br /> RWQCB and DTSC will review the plans . COE proposes <br /> bioremediation for contaminated soil , and soil to be left in <br /> place . ., RWQCB will get back with COE on bioremediation of <br /> the excavated soil . International Technology Corporation <br /> (ITC) will be remediating the diesel contaminated soil and <br /> COE is going to try and include the metals contaminated <br /> soils from the Subsistence Warehouse in the contract . The <br /> EPA stated this was 'okay' provided the metals portion is <br /> covered under a separate report . <br /> Well Monitoring Program <br /> i QM Sampling #2 - September 1991 <br /> QM Report #2 - November 1991 <br /> QM Sampling #3 - December 1991 <br /> QM Report #3 - February 1992 (Decision point ; SOW and <br /> establish new contract) <br />_ QM Sampling #4 - March 1992 <br /> QM Report #4 - May 1992 <br /> QM #1 , Year 2 - June 1992 <br /> Draft Annual Report - July 1992 (Recommendations on what to <br /> do ; how to continue to <br /> sample) <br /> RWQCB would like to see the data collected and have no <br /> program break . COE suggests that sampling be continued . <br /> E: RWQCB opposes dropping the quarterly sampling . They will be <br />{a reviewing the monthly and quarterly data. DDRW wants it on <br /> an option basis so that wells/contaminants which do not <br /> appear to be a problem can be dropped . COE will submit a <br /> written proposal stating what sampling will be performed on <br /> the wells . Decision will be made in the third report as to <br /> what route to take . <br /> Subsistence Warehouse <br /> A number of sites were excavated . Forty-nine drums were dug <br /> up. Nothing was found outside of calcium/cyanide , some VOCs <br /> in drums , small quantities of some pesticide , and lead. <br /> Everything will be mapped and color photographs will be <br /> 4 <br />