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Phase 11 Environmental site Assessment Workplan <br /> 324 East 1 l th Street,Tracy,CA <br /> June 20,2013 <br /> Page 4 of 5 <br /> samples will be analyzed for: MTBE, tert-amyl methyl ether (TAME), tert-butyl alcohol (TBA), <br /> diisopropyl ether (DIPE), ethyl tert-butyl ether (ETBE), methanol, ethanol; and lead scavengers <br /> 1,2-dichloroethane(DCA)and 1,2-dibromoethane(EDB) by EPA Method 8260. To facilitate soil <br /> disposal, one composite soil sample will be analyzed for total lead by EPA Method 6010. <br /> Task 3 —Contingent Soil and Groundwater Sampling (if Merited) <br /> If significant contamination is observed during initial soil borings, Pangea plans to perform up to <br /> five step-out soil borings in an approximate radial formation as shown on Figure 1. Additionally, <br /> Pangea will install one to two of the borings to a deeper depth to provide vertical delineation. The <br /> contingent soil and groundwater sampling will be performed following procedures described <br /> above. To faciliate sampling of deeper soil and groundwater, dual-tube direct push sampling <br /> equipment may be used. A discrete-depth sampling device may also be used to sample deeper <br /> groundwater. Prior to performing this additional contingent investigation, Pangea will discuss <br /> initial sampling results with the property owner and other parties as directed by the property <br /> owner and in accordance with permit conditions. <br /> Task 4—Waste Management and Disposal <br /> Soil cuttings, decontamination water, and other investigation-derived waste will be stored onsite <br /> in Department of Transportation (DOT)-approved 55-gallon drums. The drums and their contents <br /> will be held onsite pending laboratory analytical results. Upon receipt of the analytical report,the <br /> waste will be transported to an appropriate disposal/recycling facility. <br /> Task 5— Phase II ESA Report Preparation <br /> Upon receipt of analytical data, Pangea will prepare a Phase II Environmental Site Assessment <br /> Report. The report will describe field activities, present analytical results, and include a site <br /> figure showing sampling locations. Pangea understands that the SJEH requires reporting of any <br /> hydrocarbon impact detected by the permitted borings. <br /> If you have any questions,please feel free to contact me at(510)435-8664. <br /> Sincerely, <br /> PANGEA Environmental Services, Inc. Qa �ryq <br /> LLI <br /> Bob Clark-Riddell, P.E. 1 No. C Q <br /> President/Principal Engineer �}t7 <br /> CFVl4 4��P�'. <br /> OF C/!►i\E�� '� <br />