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5 ..�x �-a-- _�-._ �#m :;u� _i T.l-.�'- alga- - $ � - �-�r-�c - a.��.�� :�3,_-.- - `.:: 'ss __.. -. -'�'s- ra - '=•� _ -..lP�+n <br /> j <br /> ra <br /> September 1.6, 1991 <br /> ARCO Service Station ,No. 2076. Lodi, California <br /> from borings B-1 through B-3 up to 159 <br /> ?' The geologist noted PID readings on the sampless rant ed <br /> parts p <br /> er million by volume (ppmv). In borings B-6. B-7 and 13-8 the PIU reading g <br /> from 5 to 66 ppmv. The PID did not detect hydrocarbons in soil samples collected root <br /> borings B-4 and B-5• <br /> ter- <br /> ground W, <br /> Barings B-1 through B-5 were drilled to approximately 30 feet ber was elow <br /> in borings or B-1 B-2,rand <br /> whichever was encountered first. Ground <br /> ddeat Aar,1710 13-1 through B-5 were terminated <br /> B-$ at approximately <br /> 30 feet below grade. g <br /> ted to the surfa <br /> between 29 and 31 feet below grade and grou26 1/2 feet t below grade and <br /> were drilled to approxi <br /> slurry. Borings B-6.B"7and B-8 wmately <br /> s V«''1�VW-2 and VtiV-3 respectively. Details of vapar- <br /> converted to vapor-extractions well <br /> extraction well construction are shown on the Logs of Borings. <br /> -foot intervals from each boring <br /> were submitted to <br /> Two to four soil samples collected at 5 <br /> The samples submitted for analyses are shown on <br /> State-Certified laboratories for analyses. <br /> the Chain Of Custodv (Appendix B) <br /> Laboratory Analyses and Results <br /> Soil samples selected for analyses were analyzed for total petrolehydrocarbons Method 5030 <br /> S ency (EPA) preparation <br /> Gasoline (TPH9) using Environmental Protection Ag <br /> and modified EPA lllethad 8413 and BTEX using EPA Method 802Q. <br /> F aboratory analyses of soil samples collected during the Octobes 1990 tilling <br /> Results a� 1 <br /> event (Table?)indicated hydrocarbons were not detected oluenenethylbenxerte,the soil land total xylene <br /> analvses from borings B-2. B- and B o: benzene. from borings B-1 and B-3 ranging <br /> isomers(BTEX) concentrations were detected in samples <br /> from 0.08 to 0.052 parts per million (ppm). <br /> u1008-3R' <br />