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Mr.M.Scott Mansholt—CEMC <br /> 06 <br /> Site Investigation Work Plan March 29, f 5 <br /> Banta Road—UPRR Page 5 oof 5 <br /> • Total petroleum hydrocarbons quantified as crude oil(TPHc; CIO-C36)by EPA Method <br /> 8015M, <br /> • BTEX by EPA Method 8021B,and <br /> • Polynuclear aromatic hydrocarbons(PAHs)by EPA Method 8270C SIM. <br /> GROUNDWATER SAMPLE ANALYSES <br /> SAIC will collect a grab groundwater sample from each open borehole and submit the samples <br /> for the following chemical analyses: <br /> • BTEX by EPA Method 8021B, <br /> • TPH quantified as diesel(TPHd; C10-C25)by EPA Method 8015M(all samples with <br /> detectable concentrations of TPHd will be reanalyzed with silica-gel cleanup),and <br /> • PAHs by EPA Method 8270C SIM. <br /> QUALITY ASSURANCE/QUALITY CONTROL <br /> All field procedures will be conducted in accordance with SAIC's Quality Assurance and Quality <br /> Control Sample Collection,Handling, and Analysis 5procedures. <br /> REPORTING AND SCHEDULE <br /> SAIC anticipates beginning the investigation within 30 days following approval of the work plan <br /> and after obtaining all necessary permits,bonds, and access agreements. Upon completion of all <br /> field activities described above and receipt of all analytical results, SAIC will prepare an <br /> investigation report summarizing the field activities and observations,the laboratory analytical <br /> results, and conclusions and recommendations. A report of findings will be submitted to the <br /> RWQCB within 60 days after completion of the proposed fieldwork. <br /> CLOSING <br /> If there are any questions pertaining to the content of this report please call Chris Dennis at <br /> (916)979-3866. <br /> Sincerely, <br /> SCIENCE APPLICATIONS INTERNATIONAL CORPORATION <br /> Barrett Kaasa Christopher B. Dennis <br /> Environmental Scientist Senior Geologist <br /> Enclosures: <br /> Figure I Site Vicinity Map <br /> Figure 2 Site Map with Proposed Boring Locations <br /> Attachment A Summary of Field Activities, South San Joaquin Irrigation District Pipeline, <br /> Banta Road,Tracy,California,May 26,2004 <br /> 5. SAIC,2006. Quality Assurance and Quality Control Sample Collection,Handling,and Analysis. January <br /> (Updated). <br />