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5 feet below the surface of the water table. <br />' The chemical MtBE was not tested for this quarter. It was tested <br /> for four quarters and no MtBE was found. <br /> The ferrous iron, nitrate and sulfate levels were not tested <br /> for this quarter. The anaerobic activity has been documented as <br /> taking place in the past and no further testing for it is <br /> planned. We tested for dissolved oxygen concentrations which <br /> I indicates aerobic activity and we will continue to perform these <br /> tests in the future. <br />' The benzene levels continue to be above 100 ug/L in well MW-11 <br /> which is the downgradient at this site. Perhaps a well located <br /> further gradient is warranted, we await comments from the DHS. <br /> On May 13 , 1997 , we executed the work plan dated February 14, <br /> 1997 and approved by the DHS on March 4 , 1997. We introduced <br /> Oxygen Release Compound (ORC) into 8 wells on the site. The <br /> I purpose of this is to lower the amount of gasoline contaminate in <br /> the groundwater under the site and reduce the amount of <br /> contamination leaving the site. The number of pounds of ORC <br /> Iplaced in the casing in each well is as follows: <br /> WELL Pounds ORC <br /> MW-1 8 <br /> MW-2 8 <br /> MW-3 8 <br /> MW-4 22 <br /> MW-6 21 <br /> MW-7 22 <br /> MW-9 22 <br /> Sparge 4 <br /> In the future we will be testing for oxygen concentrations in <br /> wells MW-5 and MW-8 to see of increases occur and if TPH levels <br /> decrease. <br /> This quarter we installed the Vapor Extraction System along with <br /> I the associated utilities. At present the electric motor of the <br /> VES system is being repaired. This system will be placed in <br /> operation in the latter half of May, 1997 . <br /> I <br /> Page 2 <br />