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11 December 2000 <br /> AGE-NC Project No 97-0312 - <br /> Page 4 of 4 - <br /> the site ` <br /> • TPH-g, TPH--d, bei zene and toluene were detected In the water samples collected from <br /> -` UST-5; TPH-d was detected in UST-1 and UST-4 Hydrocarbons were not detected in the' <br /> water samples collected from UST-2,UST-3 and UST-6 <br /> • MTBE and fuel oxygenated compounds were not detected above laboratory reporting levels <br />' , r in the ground water samples collected this quarter - <br /> • 1,2-DCA was detected in the samples collected from UST-5 and UST-6 at concentrations of <br />' ^ 750 µg/1 and 4 0 µg/1„respectively, exceeding the State of Califorma drinking water <br /> maximum contaminant level (MCL) of 0 5 µg/1 <br /> • Petroleum hydrocarbons were not detected in the two on-site domestic wells on either 20 or <br />' 28 September 2000 <br /> I <br /> • Chlorinated hydrocarbons were not detected in any of the ground water samples collected <br />' this quarter <br /> r <br /> 5.0. RECOMMENDATIONS <br />' Based upon data obtained from the site, AGE recommends the following <br /> 4 <br /> • An oxygen releasing compound (ORC) should be considered for injection into UST-5 and <br />' M , utilized as a catalyst for bioremediation of UST-5 ' <br /> • The next monitoring event is scheduled for December 20Q0 <br /> I <br /> ' r <br /> 6.0, LIMITATIONS ; <br /> , 3 y <br /> Our professional services were performed using that degree of care and skill ordinarily exercised+by " <br /> environmental consultants practticini g in this or similar,localities The findings were based mainly <br />' upon analytical' results provided by an independent laboratory Evaluation of the <br /> geologiclhydrogeologic conditions at the site for the purpose of this investigation was made from <br /> a limited number'of available data points(i a ground water samples)and subsurface conditions may <br />' vary away from these data points No other warranty, expressed or implied, is made as to,.the <br /> professional recommendations contained in this report <br /> , rs <br /> ' y r <br /> I <br /> ` S <br /> Advanced GeoEnviranmental,Inc <br /> I <br /> , t ^ <br />