ARCHIVED REPORTS_XR0002491 - Laserfiche WebLink

Home Browse Search

i RAH drilled seven soil borings on November 28 , 1994 . Of the soil samples from the borings, only those from SB1 contained detectable amounts of hydrocarbons . No soil contamination was detected in samples analyzed from the installation of the prior soil borings at this site The presence of hydrocarbon contamination in the sample from SB1 probably is a result from .its close proximity to the old tank pit Its location next to the fork lift shop precluded drilling a conformation boring further from the tank pit in that direction FEBRUARY 10, 1995, SOIL BORINGS Selection of Soil Boring_Locations . The three soil borings were augered inside the forklift shop, see figure 3 The first boring HA1 was drilled on the other side of the out side wall of the shop opposite SB1, five feet in from the wall . When gasoline odor and elevated PID readings were detected in the soil while augering the boring, it was decided to auger HA2 12 feet further in from the wall Gasoline odor was also detected in HA2 necessitating the drilling of HA3 HA3 was drilled 28 5 feet in from the wall that faces the excavation, see figure 3 Drilling and Soil Sam le Collection- • The three soil borings were hand augered using a 4 5" augur, under the supervision of a WEGE geologist, working under C-57 license #513857 The borings were augered to a depth of 15 . 5 to 16 feet below surface, (see Appendix A Boring Logs) Soil samples were collected at the top of water, 6-8 feet bgs, (see Appendix A Boring Logs) , at the point were gasoline odor was first detected 11 to 12 feet below surface and at the base of the boring An attempt was made to collect the samples with the aid of a hand driven slide hammer, but it was found that once below the top of ground water the tubes would not retain the samples, therefore the samples were collected by filling the 2"X6" brass tubes by pushing them into the hand auger bucket After the boring was completed, the ground water was allowed to equilibrate, and the depth to water was measured A new disposable bailer was used to collect a water sample from the boring. The augers were washed with a TSP solution between each boring During the operations, the geologist maintained a log of the materials encountered Soil samples were field screened for the presence of total volatile organic (TVO) vapors using a handheld PID equipped with a 10 2 EV lamp 2