ARCHIVED REPORTS_XR0011556 - Laserfiche WebLink

Home Browse Search

` 27 September 1999 AGE-NC Project No 95-0167 Page 3 of 9 • Laboratory analysis of selected soil and ground water samples for total petroleum hydrocarbons as gasoline (TPH-g), volatile aromatic compounds (benzene, toluene, ethyl- benzene and total xylene BTEX) and fuel oxygenating compounds including di-isopropyl ether(DIPS),ethyl tertiary-butyl ether(ETBE), ethanol,methyl-tertiary butyl ether (MTBE), tertiary-amyl methyl ether(TAME) and tertiary-butanol (TBA), • Preparation of this report presenting the findings and results of the investigation activities 4.0. SITE INVESTIGATION ACTIVITIES On 15 and 16 June 1999, AGE advanced four soil boring for the construction of ground water monitoring wells, collected soil samples and procured laboratory analysis of the soil samples Additionally,the scope of work included the development of the four ground water monitoring wells On 29 July 1999, ground water samples were collected from each of the ground water monitoring wells Prior to mobilization of drilling equipment, the site investigation location was clearly marked and a utility clearance was obtained through Underground Service Alert • 4 1 SOIL SAMPLE COLLECTION AND ANALYSIS The four soil borings (MW-1 through MW-4) were advanced utilizing hollow-stem auger drilling techniques and were subsequently completed as monitoring wells Soil boring and monitoring well locations, shown on Figure 2, are located on the east portion of the site surrounding the approximate location of the former gasoline dispenser location Soil boring MW-I was advanced directly east of the former dispenser Soil boring MW-2 was established east of the former UST location, northeast of boring MW-1 Soil boring MW-3 was established west of the former UST location and west of the building on the site Soil boring MW-4 was established northeast of the former UST location, in a somewhat down-gradient location Soil boring MW-1 was advanced to a depth of 35 feet below surface grade (bsg) Soil borings MW-2 through MW-4 were advanced to a depth of 30 feet bsg Soil samples were collected and described to characterize the subsurface soil profile and identify water-bearing units for monitoring well screen placement Installation of the wells was performed using a truck-mounted CME 75-HT drill rig equipped with a 8-inch continuous flight hollow-stem augers The drill rig and two-man crew were supplied by Soil Exploration Services (SES) of Sacramento, California Samples were collected from the borings at five-foot intervals using a • California-modified split spoon sampler loaded with three clean, 2 X 6-inch brass sleeves A 140- pound hammer was used to advance the sampler 18 inches,the number of blows required to advance Advanced GcoEnwonmental,Inc