Laserfiche WebLink
APPENDIX F: <br /> DATA USABILITY SUMMARY <br /> INTRODUCTION <br /> The Benham Companies, LLC, an SAIC Company(SAIC-Benham) evaluated the analytical data <br /> for soil and groundwater samples collected at US Can—Welty Road(the site) located in <br /> Vernalis, California. This data usability summary presents the results of the data review and <br /> validation process. SAIC-Benham collected environmental samples on behalf of Chevron <br /> Environmental Management Company to delineate the lateral extent of petroleum-affected soil <br /> and groundwater. Soil, groundwater, and water-matrix quality control (QC) samples were <br /> collected between July 20 and 22, 2010. The samples collected were as follows: <br /> • Nine soil samples <br /> • Four groundwater samples <br /> • One groundwater matrix spike(MS) sample <br /> • One groundwater matrix spike duplicate (MSD) sample <br /> • One groundwater field duplicate sample <br /> • Two water-matrix trip blank(TB) samples <br /> • Two equipment rinsate blanks <br /> • One water-matrix field blank <br /> Lancaster Laboratories, Inc. (Lancaster)performed all the analyses on the samples. The data <br /> were reported in laboratory reports 1203972, 1203973, 1203974, 1204353, and 1204354. <br /> Lancaster is certified by the State of California through the Department of Health Services to <br /> perform environmental analyses. Soil and groundwater samples were analyzed using methods <br /> contained in United States Environmental Protection Agency(EPA)publication SW-846. <br /> Soil samples were analyzed for the following constitutents: <br /> • Benzene, toluene, ethylbenzene, and total xylenes(BTEX)by EPA Method 8260B. <br /> • Polynuclear aromatic hydrocarbons (PAHs)by EPA Method 8270C with selective ion <br /> monitoring(SIM). <br /> • Total petroleum hydrocarbons (TPH) quantified as crude oil (TPHc), carbon range CIO- <br /> C36i by EPA Method 8015 Modified. <br /> Groundwater and water-matrix samples were analyzed for one or more of the following <br /> constituents: <br /> • BTEX by EPA Method 8260B. <br /> • PAHs by EPA Method 8270C with large-volume injection(LVI). <br /> • TPH quantified as diesel (TPHd), carbon range CIO-C25, by EPA Method 8015 Modified; <br /> a silica gel clean-up procedure based on EPA Method SW3630 was also performed on <br /> samples with TPHd detections to remove non-target biogenic compounds. <br /> • Alkalinity, bicarbonate, and carbonate by Standard Method(SM)20 2320 B. <br /> F-1 The Benham Companies.LLC <br />