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Phase II Environmental Site Assessment Report <br /> 324 East 11th Street <br /> Tracy, CA <br /> July 23, 2013 <br /> borings B-1 through B-4 and B-6,the inner drilling rods were removed,temporary PVC piping and well screen <br /> was installed within the boring,and the outer drill rods were then removed.To sample deeper groundwater in <br /> boring B-5,the outer casing was pulled back from approximately 25 ft bgs to 23 ft bgs to expose 2 ft of screen <br /> in deeper soil. Grab groundwater samples were collected in new disposable bailers. Groundwater samples <br /> were then decanted into appropriate containers. Boring logs are included in Appendix C. All samples were <br /> shipped under chain of custody to McCampbell Analytical,Inc.,of Pittsburg,California,a California-certified <br /> laboratory. <br /> The drilling was observed in the field by Pangea project scientist Tina de la Fuente and supervised by Bob <br /> Clark-Riddell, a California Registered Professional Civil Engineer(P.E.). Soil characteristics such as color, <br /> texture, and relative water content were noted in the field using the USCS classification system and entered <br /> onto a field boring log. Field screening of soil samples for potential hydrocarbons and volatile organic <br /> compounds included visual and olfactory observations and a photo-ionization detector(PID). <br /> Sample Analyses <br /> Select soil and groundwater samples were analyzed for the following: <br /> ■ Total Petroleum Hydrocarbon Fuel Scan (TPH as gasoline, diesel, and motor oil)by EPA Method <br /> 8015B. Silica gel filtration was used prior to analysis for TPH as diesel and TPH as motor oil. <br /> ■ Total Petroleum Hydrocarbons as gasoline(TPHg),benzene,toluene,ethylbenzene,xylenes(BTEX) <br /> and methyl tert-butyl ether(MTBE)by EPA Method 8015/8021. <br /> Fuel oxygenates methyl tertiary butyl ether (MTBE), tert-amyl methyl ether (TAME), tert-butyl <br /> alcohol (TBA), di-isopropyl ether(DIPE), ethyl tert-butyl ether(ETBE), methanol, and ethanol by <br /> EPA Method 826013; and lead scavengers 1,2-dibromoethane(EDB) and 1,2-dichloroethane(1,2- <br /> DCA)by EPA Method 8260B. <br /> 3 <br />