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JAh4-16--°91 WED 12:04 TECHNOLOGIES, TEL NO:4.38 <br /> -- #498 P07 -- <br /> F ' <br /> The results were recorded on d Houston Instruments chart recorder. The <br /> BeCkman Model 400 was calibrated using certified standards of propane in <br /> nitrogen, The instrument was recalibrated periodically throughout the <br /> day using Certified standards, <br /> Re�ul is <br /> The total hydrocarbon concentration as vapor (TVH) recorded at the <br /> temporary vapor probes and monitoring wells at the depth intervals tested <br /> are given in Table 1 . <br /> The highest TVH concentration, 19,425 parts per million (ppm) , was <br /> recorded at monitoring well MW-3 in the vicinity of the former tank <br /> complex. Hydrocarbon concentrations as vapor were recorded at depths <br /> greater than 28 feet only, with one exception. A vapor concentration of <br /> 250 ppm was recorded at 19 to 21 feet below grade at Probe J. Probe J is <br /> in the vicinity of the former tank complex; TVH concentrations were <br /> recorded through the 32 to 34 feet depth interval at this probe. <br /> Table 1 . Soil Vapor Concentrations, <br /> LOCATION DEPTH TVH FLOW RATE <br /> (feet) (ppm) (cfh) <br /> A 14-16 ND 2 <br /> B 14-16 ND 2 <br /> C 14.16 ND 1<2 <br /> C 19-21 ND 14 <br /> C 28-30 ND 20 <br /> D 14-16 ND <2 <br /> D 28-30 NO 20 <br /> E 14-16 ND 2 <br /> F 14-16 NO 2 <br /> G 8-10 NO <2 <br /> G 14-16 ND 2 <br /> G 28-30 100 3 <br /> H 19-21 NO 18 <br /> H 28-30 ND 3 <br /> 1 14-16 NO 4 <br /> I 19.21 NO 9 <br /> I 28-30 15 4 <br /> I 32.34 NO 20 <br /> 14.16 ND 2 <br /> - 3 - <br /> i. <br /> > S <br />