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APPENDIX D.1 <br /> DATA USABILITY SUMMARY <br /> INTRODUCTION <br /> SAIC evaluated the analytical data for groundwater samples collected at Vernalis Offsite in Vernalis, <br /> 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 groundwater. Samples were collected on <br /> January 29 through February 26,2008: <br /> • QA-Pump-R-080129 • MW-2-W-080129 • MW-3-W-080129 <br /> • MW-5-W-080129 • MW-6-W-080129 • MW-6-W-080129MS <br /> • MW-6-W-080129MSD • MW-6-WD-080129 • MW-7-W-080129 <br /> • QA-T-080225 NA water • QA-Tubing-R-080225 • SB-33-W-080225 <br /> • SB-32-W-080226 • SB-31-W-080226 • SB-31-WD-080226 <br /> • SB-33-S-5-080225 • SB-33-S-36-080225 • SB-32-S-5-080225 <br /> • SB-32-S-35-080225 0 SB-31-S-5-080225 0 SB-31-S-37-080225 <br /> • SB-29-S-5-080226 • SB-29-S-36.5-080226 • SB-28-S-5-080226 <br /> • SB-28-S-38-080226 0 SB-27-S-5-080227 0 SB-27-S-33.5-080227 <br /> • SB-26-S-5-080227 • SB-26-S-31-080227 • QA-T-080226 NA water <br /> • QA-Screen-R-080226 • QA-Screen-R-080227 • SB-29-W-080226 <br /> • SB-29-W-080226MS • SB-29-W-080226MSD • SB-28-W-080226 <br /> • SB-27-W-080227 • SB-26-W-080227 • <br /> Groundwater and soil samples were analyzed for one or more of the following analyses: <br /> • Total petroleum hydrocarbons quantified as diesel(TPHd), carbon range C,o-C25,by United <br /> States Environmental Protection Agency(EPA)Method SW8015B modified; a silica gel-cleanup <br /> procedure based on EPA Method SW3630 was also performed on samples with TPHd detections <br /> to remove non-target biogenic compounds. <br /> • Polynuclear aromatic hydrocarbons(PAHs)by EPA Method SW8270C with selective ion <br /> monitoring(SW8270C-SIM). <br /> • Kjeldahl nitrogen by EPA Method 351.2. <br /> • Ammonia nitrogen by SM20 4500NH3 B/C modified. <br /> • Chloride, sulfate nitrite, 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 /> • Total hardness SM 18 2340. <br /> • Metal(calcium,iron, magnesium,potassium, sodium, manganese, and boron)by SW-846 601013. <br /> The data was evaluated in general conformance to the requirements of project objectives specified in the <br /> following documents: <br /> D.1-1 <br /> From Science to Solutions <br />