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A S S O C i A T E S I M C <br /> During drilling and sampling activities, an obvious odd and unusual `bitrus" odor was observed <br /> between 56 and 75 feet bgs in SB 1, and between 40 and 51 feet bgs in SB2 This odd odor did <br /> not appear to register on the PID instrument indicating it was not a volatile organic compound <br /> Groundwater Sample (Collection <br /> A grab groundwater sample was collected from each of the two borings by lowering a dedicated <br /> disposable bailer down though the open hollow stem auger to groundwater Prior to advancing <br /> the augers past 76 5 feet bgs, all down hole equipment was steam cleaned with laboratory grade <br /> Alcanox® detergent The hollow stem augers were advanced approximately 4 feet past first <br /> encountered water for the purpose of obtaining an adequate volume of water required for <br /> laboratory analysis A field geologist was present to supervise the investigation and collect the <br /> groundwater samples Descriptions of field conditions encountered were recorded and are <br /> included on the Soil Boring Logs in Attachment 1 Subsequent to the sample collection, the open <br /> soil borings were tremle grouted to the surface with neat cement <br /> Soil and Groundwater Sample Analysis <br /> Selected soil samples and groundwater samples from boring SB 1 and S132 were placed on ice and <br /> delivered to Sequoia Analytical laboratory Soil samples were analyzed for total petroleum <br /> hydrocarbons as gasoline (TPHg) by EPA Method 8015, benzene, toluene, ethylbenzene, xylenes <br /> (BTEX) by EPA Method 8020, methyl tertiary butyl ether (MTBE) by EPA method 8260 or <br /> 8020, fuel oxygenate compounds by EPA 8260, and/or total lead by IPC or Atomic Absorption <br /> Additionally due to the odd `bitrus"odor detected during drilling activities discussed above, one <br /> soil sample was analyzed for volatile organic compounds (VOCs) by EPA method 8260 The soil <br /> sample selected for the VOC analysis was collected from SB 1 at 65 5 feet bgs and was chosen <br /> because the odor appeared be most concentrated at this location relative to the other samples <br /> collected <br /> All soil and groundwater analysis performed was requested by Ms Carol Oz of San Joaquin <br /> County Public Health Services, Environmental Health Division (PHS/EHD) based on site history <br /> and field observations during drilling activities <br /> i <br /> w\14885VgxKU\SUM doc 3 <br />