WORK PLANS - Laserfiche WebLink

Home Browse Search

27 July 1999 AGE-NC Project No. 99-0605 Page 3 of 5 Based on soil contamination encountered beneath the former USTs and dispensers, AGE proposes advancement of borings in the following locations: • The area of the former dispenser island, located south of the former UST No.3; • Approximately 10 feet south of the former dispenser island area; • Approximately 10 feet northwest of former UST No. 2; • Approximately 10 feet north of former UST No. 3; and • Approximately 10 feet northeast of former UST No. 1. Initially, AGE will advance one boring to a depth of approximately 70 feet bsg or to ground water, the other four borings will be advanced to 30 feet bsg, although total depths of soil borings will be based on field observations and field screening using an organic vapor monitor(OVM). Soil samples will be collected from each boring at five-foot intervals beginning at 5 feet bsg to the total depth, excluding the boring within the excavation, where sample collection will start at 15 feet bsg. Field procedures for advancement of borings and collection of soil/ground water samples are presented in Section 4.1. and 4.2. Selected soil samples will be analyzed by a State of California Department of Health Services (DHS)-certified laboratory for the following constituents: • Total petroleum hydrocarbons as gasoline (TPH-g) in accordance with EPA Method 8015 Modified; • TPH-d (diesel) and TPH-mo (motor oil) in accordance with EPA Method 8015 Modified; • Benzene, toluene, ethylbenzene, xylenes and methyl tertiary butyl ether (MTBE) in accordance with EPA Method 8020; and • Fuel oxygenates including MTBE,tertiary-butyl alcohol (TBA), di-isopropyl ether (DIPS), ethyl tertian-butyl ether(ETBE) and tertiary-amyl methyl ether(TAME) in accordance with EPA Method 8260 Modified. 3.3. REPORT PREPARATION Upon completion of field work and receipt of the final laboratory results, a report will be prepared presenting the findings of the investigation. The report will include a description of the work performed and results of the sampling and analysis. Conclusions and applicable recommendations Advanced GeoEn%ironmental.Inc.