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Chevron Pipeline Easement Environmental Assessment Report <br /> November 21,2001 <br /> Page 5 <br /> 3.5 LABORATORY ANALYSES <br /> Soil samples were analyzed for total extractable petroleum hydrocarbons quantitated against crude oil <br /> (TEPH-C) by GC/MS Combination. Most soil samples that had detectable concentrations of TEPH-C <br /> were analyzed for benzene, toluene, ethylbenzene, and total xylenes (BTEX).by EPA Method 8260; and <br /> for polynuclear aromatic hydrocarbons (PNAs) by EPA Method 8270. Additionally, if no soil sample <br /> collected from soil borings during the course of one day had detectable concentrations of TEPH-C, the <br /> soil sample collected that day that had the highest PID measurement was analyzed for BTEX and PNAs. <br /> Analytical methods used and practical quantitation limits (PQLs)are listed in Table 1, below. <br /> Table 1. Soil Sample Analytical Methods and Practical Quantitation Limits <br /> Analyte Method PQL <br /> TEPH-C GUMS Combination 10 mg/kg <br /> Benzene EPA 8260 0.005 mg/kg <br /> Toluene EPA 8260 0.005 mg/kg <br /> Ethylbenzene EPA 8260 0.005 mg/kg <br /> Xylenes EPA 8260 0.005 mg/kg <br /> PNAs <br /> Acenaphthene EPA 8270(SIM) 0.005 mg/kg <br /> Acenaphthylene EPA 8270 (SIM) 0.005 mg/kg <br /> Anthracene EPA 8270 (SIM) 0.005 mg/kg <br /> Benz(a)anthracene EPA 8270(SIM) 0.005 mg/kg <br /> Benzo (b) fluoranthene EPA 8270 (SIM) 0.005 mg/kg <br /> Benzo (k) fluoranthene EPA 8270 (SIM) 0.005 mg/kg <br /> Benzo (a)pyrene EPA 8270 (SIM) 0.005 mg/kg <br /> Benzo (ghi)perylene EPA 8270 (SIM) 0.005 mg/kg <br /> Chrysene EPA 8270 (SIM) 0.005 mg/kg <br /> Dibenzo(a,h) anthracene EPA 8270 (SIM) 0.005 mg/kg <br /> Fluoranthene EPA 8270 (SIM) 0.005 mg/kg <br /> Fluorene EPA 8270 (SIM) 0.005 mg/kg <br /> Indeno (1,2,3-cd) pyrene EPA 8270 (SIM) 0.005 mg/kg <br /> Naphthalene EPA 8270 (SIM) 0.005 mg/kg <br /> Phenanthrene EPA 8270 (SIM) 0.005 mg/kg <br /> Pyrene EPA 8270 (SIM) 0.005 mg/kg <br /> mg/kg=milligrams per kilogram <br /> PQL=standard Practical Quantitation Limit <br /> Groundwater samples were analyzed for total petroleum hydrocarbons quantitated against gasoline <br /> (TPH-G) by EPA Method 8260 and GUMS Combination, BTEX by EPA Method 8260,total extractable <br /> petroleum hydrocarbons quantitated against diesel (TEPH-D) by GUMS Combination, TEPH-D with <br /> silica gel cleanup performed on extract by EPA Method 3630 (TEPH-D/SG) by GUMS Combination, <br /> and for PNAs by EPA Method 8270 (SIM). Analytical methods used and PQLs are listed in Table 2, on <br /> the next page. <br /> 4M <br /> CONDOR <br />