Laserfiche WebLink
• <br /> 22 August 2003 <br /> • AGE-NC Project No. 02-0896 <br /> Page 3 of 5 <br /> 3.0. PROCEDURES <br /> On 03 March 2003, AGE personnel conducted soil sampling activities at the site. Prior to <br /> mobilization, the area of investigation was clearly marked and a utility clearance obtained through <br /> Underground Service Alert. <br /> 3.1. PROBING AND SAMPLING <br /> A single soil boring (P-1) was advanced within the former 1,000-gallon UST excavation on <br /> 03 March 2003 using a van-mounted Geoprobe 5400 direct-push probing unit equipped with <br /> 1.25-inch diameter probing rods; the probing unit advances soil probe borings using a hydraulic <br /> thammer to drive soil and ground water sampling tools to specified depths. Figure 2 depicts the <br /> location of the soil boring. <br /> The boring was advanced to a total depth of 50 feet below surface grade(bsg) before encountering <br /> refusal.Discrete soil samples were collected at 5-foot intervals beginning at a depth of 10 feet bsg; <br /> samples were collected using a 1.5-inch diameter, two-foot long, piston type sampler loaded with <br /> • four pre-cleaned 6-inch brass sleeves. The sampling equipment was washed in an Alconox solution <br /> and double rinsed with water prior to each sampling run to avoid cross-contamination. <br /> Upon sample retrieval, both ends of the leading or other brass sleeve were covered with Teflon <br /> sheets, capped and sealed with tape. The samples were labeled, stored on ice and transported under <br /> chain-of-custody to Cal Tech Environmental Laboratories(CTEL)a State of California Department <br /> of Health Services (DHS)-certified analytical laboratory. Selected samples were analyzed for: <br /> • Total petroleum hydrocarbons as gasoline (TPH-g) in accordance with EPA Method 8015 <br /> Modified; and <br /> 1 • Benzene,toluene,ethylbenzene and total xylenes(BTEX)and the fuel additives methyl-tert- <br /> butyl ether(MTBE), tertiary butyl alcohol (TBA), di-isopropyl ether(DIPE), ethyl tertiary <br /> butyl ether (ETBE), tertiary amyl methyl ether (TAME), 1,2-dibromoethane (EDB), <br /> 1,2-dichloroethane (1,2-DCA), methanol and ethanol in accordance with EPA Method <br /> 8260B. <br /> 3.2. SOIL LOGGING <br /> After sample preservation,soil was extruded from the remaining sleeves and field-screened utilizing <br /> • an organic vapor analyzer (OVA) equipped with a photo-ionization detector (PID: Thermo <br /> Environmental 580b, 10.0 eV,calibrated to isobutylene). The soil was also described in accordance <br /> Advanced GeoEnvironmental,Inc. <br /> 1 <br />