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• Geofogicaf Technics Inc. <br /> 2741 River9Zpad <br /> Marfesto,California 95351 <br /> (209)5384424157 al#538-5852 <br /> REPORT <br /> Groundwater Monitoring—Site Closure Request <br /> August, 2000 <br /> C & B Equipment <br /> Al <br /> 7474 West lith Street <br /> Tracy, California <br /> Proj ect No. 336.2 <br /> October 11, 2000 <br /> EXECUTIVE SUMMARY <br /> This report summarizes the August, 2000 round of groundwater monitoring and testing that <br /> took place on August 31, 2000. The test results show that detectable concentrations of the <br /> -i aromatic hydrocarbon compounds (BTEX) and gasoline range petroleum hydrocarbons <br /> (TPH-G) are present in three monitoring wells (MW-1, 2 & 101). MTBE was detected in two <br /> of the samples during this event. <br /> Wells MW-1 and MW-101 were re-sampled on September 19, 2000, to confirm the August <br /> 31, 2000 sample results. The results of the analyses confirm the presence of MTBE in well <br /> MW-1 and the presence of Ethanol in well MW-101. The low levels of these compounds <br /> present do not represent a significant risk to human health or the environment. <br /> The groundwater level has risen about 0.1 feet since October 1997. Site specific gradient and <br /> bearing measurements and calculations show that groundwater flows in a northerly direction <br /> at approximately 0.004 Mt. <br /> l <br />