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' r D <br /> 171-90 <br /> FINDINGS <br /> is <br /> The findings that follow area result of the field Investigation and laboratory soil and <br /> x <br /> groundwater analyses conducted on January 21 and 22, 199 . <br /> y <br /> l ; <br /> A. f=ield Investigation (APPENDIX A): <br /> Y y clay strata, <br /> 1 . The site lithology is generally comprised of a sitbclay/a e of silly slit. <br /> f.� overlain by a fine to coarse-grained sand and cappedY Y <br /> 1 r 2, The depth to groundwater is approximately 18 feet below the ground surface <br /> per measurements taken in the on-site monitoring wells. <br /> to medium <br /> i 3. During the drilling phase of the field Investigation strong <br /> e detected in all of the monitoring well borings: <br /> petroleum odors war <br /> 4. Soil densities were generally classified as medium to dense. <br /> t below ground <br /> t f , 5. The groundwater 0 .0051ent fee,per footrtowardsed at stheenorthe stt (FIGURE f3)a was <br /> calculated toe <br /> [ <br /> g, During the ground water sampling phase of the site field investigation an <br /> f a unidentified odor was detected in Monitoring Well MW1. <br /> ? B. Laboratory Analyses of Soil and Groundwater Samples <br /> (APPENDIX 13): <br /> i <br /> Petroleum constituents were found to be present in the soli e Levels collected ofi <br /> from all of the monitoring wells drilled during this project. <br /> Benzene ranged between non-detectable to 0.21 ppm. Toluene ranged between <br /> non- <br /> non-detectable to 0.3G ppm, with Total Xylenes ranging between non- <br /> 1-� <br /> detectable to 2.0 ppm. The highest overall levels were found in Monitoring <br /> Well MW2. <br /> [es indicate detectable levels of <br /> }, 2. Laboratory analyses of groundwater same, band Total <br /> line) at 3,400 ppb. <br /> petroleum contamination in all of the monitoring wells. <br /> The highest levels <br /> I , were found in Monitoring Well MWi with Benzene at 24.0 pp levels were <br /> Petroleum Hydrocarbons (gaso <br /> r" found in Monitoring Well MW3 with Benzene at i.ippb and Total Petroleum <br /> Hydrocarbons (gasoline) at 98 ppb. <br /> [ 9 <br /> s�. 3. Laboratory anaiysismo�d pniioringed to eWell Well at 21 to 2151 Leet ibelow the <br /> resulted in 0.17 pp <br /> - --- ,-•✓ - - - ---- - -ground surface. <br /> is <br /> 1 <br />