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,.a <br /> J. H. KLEINFELDER &ASSOCIATES <br /> File: W-20G6--1 <br /> March 16, 1986 <br /> Page 6 <br /> by volume in relation to a selected standard. The standard used <br /> for this investigation was 25 ppm benzene calibration gas. <br /> Calibration was performed daily prior to and during its field use. <br /> The screening procedure consisted of scraping the top soil layer <br /> collected in the middle tube to expose fresh soil and scanning the <br /> vapors emitted from that sample. PID readings were recorded on <br /> the baring logs. The results of the PID field screening are shown <br /> on Table 2 on and the bore logs (Plate Nos. 4 through 15). The <br /> PID was also used to measure the total hydrocarbon concentration <br /> i:. <br /> in the breathing zone for protection of the field craw. <br /> SOIL ANALYTICAL RESULTS OF SOIL SAMPLES <br /> F <br /> A total of sixteen soil samples collected in the field were <br /> submitted for EPA 8020 (volatile aromatic compounds) and total <br /> w„ hydrocarbons analyses. The analyses were performed by California <br /> Analytical Laboratories, Inc. located in West Sacramento. Table 1 <br /> presents the results of the soil samples analyzed. Selection of <br /> the samples for analyses were made by Guild Wineries and the San <br /> Joaquin Department of Health based on the PID readings obtained in <br /> the field. Table 2 presents the PID readings of the sixteen soil <br /> samples. <br /> ---- - - <br /> In Borings B-7 and B-9 through B-1E, low PID readings were <br /> recorded in the soil samples from a depth of sixteen feet down to <br /> a depth immediately above the water table. PID readings were also <br /> recorded in the soil samples collected at six feet (10 ppmv), <br />