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' APPENDIX D.1 <br /> DATA USABILITY SUMMARY <br /> ' INTRODUCTION <br /> Science Applications International Corporation (SAIC)evaluated the analytical data for soil, <br /> groundwater, and water-matrix quality control (QC) samples collected at the Tracy Byron Road site in <br /> ' Tracy,California. This data usability summary presents the results of the data validation process. SAIC <br /> collected environmental samples on behalf of Chevron Environmental Management Company to <br /> delineate the lateral and vertical extent of petroleum-affected soil and groundwater. Samples were <br /> collected between March 12 and 13, 2007. <br /> The total number of samples collected was as follows: <br /> • Eleven soil samples <br /> • Six groundwater samples <br /> ' • One groundwater field duplicate sample <br /> • Three water-matrix trip blank samples <br /> • Two water-matrix equipment rinsate blanks <br /> ' Lancaster Laboratories, Inc. (Lancaster)performed all the analyses on the samples. The data were <br /> reported in five sample delivery groups (SDGs): 1029184, 1029539, 1028980, 1029537, and 1029183. <br /> Lancaster is certified by the State of California through the Department of Health Services to perform <br /> ' environmental analyses. <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 /> • Methyl tertiary butyl ether(MTBE) by EPA SW8260B. <br /> • Total petroleum hydrocarbons quantified as crude oil (TPHc), carbon ranges C7-Cr6, C16-C32,and <br /> CIO-C36by EPA Method SW8015B modified. <br /> • Polynuclear aromatic hydrocarbons (PAHs) by EPA Method SW8270C with selective ion <br /> monitoring(SW8270C-SIM). <br /> t • Metals by EPA Method SW6010B. <br /> Groundwater samples were analyzed for one or more of the following constituents: <br /> • BTEX by EPA Method SW8260B. <br /> • MTBE by EPA Method SW8260B. <br /> • Total petroleum hydrocarbons quantified as diesel (TPHd),carbon range Cro-C25,by EPA Method <br /> ' SW8015B modified; a silica gel-cleanup procedure based on EPA Method SW3630C was also <br /> performed on samples with TPHd detections(TPHdsg)to remove non-target biogenic compound. <br /> • PAHs by EPA Method SW8270C with large-volume injection (SW8370C-LVI). <br /> • General minerals by EPA Method 200.7. <br /> ' • Total dissolved solids (TDS)by EPA Method 160.1. <br /> The trip blank samples were only analyzed for BTEX,MTBE,and TPHg by EPA Method SW8260B. <br /> Page D.1-1 <br /> ' From science to solutions <br />