SITE INFORMATION AND CORRESPONDENCE FILE 1

Home Browse Search

I 03 August 1999 AGE-NC Project No. 95-0121 Page 6 of 6 using a Geoprobe soil sampling assembly loaded with pre-cleaned 1 . 125-inch by 64nch brass sleeves. Upon sample retrieval, the exposed ends of the second brass sleeve will be covered with Teflon sheets, capped and sealed with tape. Soils encountered in the borings will be visually classified by an AGE geologist in accordance with the Unified Soil Classification System (USCS). Additionally, soil samples will be field-screened for the presence of volatile organic compounds using an organic vapor meter (OVM). Following sample collection, each soil sample will be labeled with the boring location, depth, time, date and sampler's initials. Appropriately sealed and labeled samples will be placed in a chilled container under ice and transported under chain-of-custody procedure to a microbiological laboratory. 4.2. OXYGEN RELEASE COMPOUND PILOT TEST PROCEDURES Nine soil probe borings will be advanced to depths of 40 feet bsg utilizing a Geoprobe 5400 soil probing unit and spaced equidistant from well EW- 1 . Approximately 100 pounds of ORC will be injected into each boring utilizing a Geoprobe grout pump. Following ORC injection, all remaining soil boring void space will be backfilled with a portland cement. Following ORC inoculation, a six month pilot test will be performed at the site to evaluate general aerobic conditions at the site as well as the effectiveness of ORC when applied to a petroleum- impacted zone in saturated soil . The ORC pilot test will consist of monitoring dissolved oxygen, pH and specific conductivity from EW- 1 on a weekly basis using a YSI Model 55 Dissolved Oxygen Meter; monthly ground water samples will be collected from EW- 1 and logged on a chain-of- custody form, placed in a chilled container and transported to a California Department of Health Services (DHS)-certified laboratory for analysis o£ • Total petroleum hydrocarbons quantified as gasoline and diesel (TPH-g and TPH-d, respectively) by EPA Method 8015 Modified, • Volatile aromatic compounds : benzene, toluene, ethyl benzene and xylene (BTEX) with methyl-tertiary butyl ether (MTBE) by EPA Method 8020, and • Tertiary butanol (TBA), di-isopropyl ether (DIPE), ethyl tert butyl ether (ETBE), tert amyl methyl ether (TAME) and MTBE by EPA Method 8260 Modified . • Dissolved Oxygen by EPA Method 360. 1 . Advanced GeoEnviromnental, Inc.