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Appendix E.1:Data Usability Summary <br /> • SB-27-W-080331 <br /> • SB-28-W-080331 <br /> Soil samples were analyzed for the following constituents: <br /> • Benzene,toluene, ethylbenzene, and total xylenes (BTEX)by U.S. Environmental Protection <br /> Agency(EPA)Method SW8260B. <br /> • Polynuclear aromatic hydrocarbons(PAHs)by EPA Method SW8270C with selective ion <br /> monitoring(SW8270C-SIM). <br /> • TPH quantified as crude oil(TPHc),carbon range C,o-C36,by EPA Method SW8015B modified. <br /> Groundwater samples were analyzed for one or more of the following constituents: <br /> • BTEX by EPA Method SW8260B. <br /> • PAHs by EPA Method SW8270C-SIM. <br /> • TPH quantified as diesel(TPHd),carbon range C,o-C25,by EPA Method SW8015B modified; a <br /> silica gel-cleanup procedure based on EPA Method SW3630 was also performed on samples with <br /> TPHd detections to remove non-target biogenic compounds. <br /> • Kjeldahl nitrogen by EPA Method 351.2. <br /> • Ammonia nitrogen by SM20 4500NH3 B/C modified. <br /> • Chloride, sulfate, and nitrate nitrogen by EPA Method 300.0. <br /> • Total Dissolved Solids by SM20 2540 C. <br /> • Specific conductance by SM20 2510 B. <br /> • Total phosphorus as PO4 by EPA Method 365.1. <br /> • Alkalinity,bicarbonate, and carbonate by SM20 2320 B. <br /> • Minerals by SW-8946 6010B. <br /> The trip blank sample was analyzed for BTEX only. <br /> The data was evaluated in general conformance to the requirements of project objectives specified in the <br /> following documents: <br /> • Quality Assurance and Quality Control: Sample Collection, Handling, and Analysis Guidelines; <br /> Chevron Texaco Historical Pipeline Portfolio Sites, California,April 2007; <br /> • SAIC Technical Procedure TP-DM-300-7,Data Validation; and <br /> • SAIC Technical Procedure TP-DM-300-14,Evaluation of Field and Analytical Data. <br /> INTENDED USES OF THE DATA <br /> Laboratory data are being used for site evaluation and decision making for petroleum releases attributed <br /> to Chevron's historical crude-oil and Bunker C fuel-oil pipelines. For contaminant delineation decision <br /> making, soil and groundwater laboratory analytical results were compared to"action levels,"or levels <br /> above which further evaluation to define the extent of contamination is appropriate. <br /> DATA QC OBJECTIVES <br /> SAIC evaluated project analytical data according to the following parameters in order to determine their <br /> usability: <br /> E.1-2 <br /> ori i wi <br /> From Science to Snlatiens <br />