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i <br /> ° 29 feet, they increased to strong odors by 39 feet below grade <br /> and began decreasing to a slight odor at 48 feet which was the <br /> ` depth that water was first encountered. These odors in general <br /> corresponded with photo-ionization detector reading taken from <br /> the collected samples which ranged from 1.8 to 440 parts per <br /> million (ppm) (See Appendix I Drill Togs) . <br /> Laboratory analysis of soils from the previous soil borings <br /> drilled by Groundwater Technology in January of 1986 did not <br /> indicate the presence of hydrocarbon components in either of <br /> the two monitoring wells or in test borings completed at that <br /> time. soil samples taken from the bottom of the tank pit <br /> excavation indicate the presence of hydrocarbon components in <br /> levels that ranged from 39 ppm to 4500 ppm. Analysis of soils <br /> from the recently completed monitoring well 3.. recorded total <br /> ; �- hydrocarbon concentrations between .057 and .58 ppm. Table 2 <br /> summarizes the . test results and Appendix III contains the r <br /> laboratory report. <br /> tTABLE 2 <br /> k SAIL SAMPLE ANALYSIS. RESULTS <br /> Sample Sample. Total petroleum Benzene Toleusiie. • Xylene <br /> ID Depth Hydrocarbons (ppm) {pprf;t (ppm) <br /> (ppm) p# <br /> p� <br /> 3C 14 ft. 0.057 0.001 0.001 0.003 <br /> 3H. 39 ft. 0.58 0.16 1.10. C,.62 1 <br /> € <br /> 32 . - 44 ft. 0.19 0.043 0.013 OA06 ; <br /> Laboratory analysis of water samples recorded detectable: <br /> -concentrations of dissolved hydrocarbons in all three wells. The <br /> concentrations of total. hydrocarbons in the wells, ranged from ; <br /> :29 ppm in monitoring wells one and- two-to 14-:0- ppm- in monitoring <br /> 4 well three. The laboratory test results are summarized in <br /> t Table 3 and the laboratory report is presented in Appendix. III. i <br /> r <br /> 9 i <br /> n <br />