ARCHIVED REPORTS_XR0005432 - Laserfiche WebLink

Home Browse Search

' 11 August 1997 AGE-NC Project No 95-0173 ' Page 2 of 10 ' to a state-certified laboratory under chain-of-custody The samples were analyzed in accordance with EPA methods 5030/8015M for total petroleum hydrocarbons quantified as gasoline and diesel (TPH- g and TPH-d), and in accordance with EPA method 8020 for volatile aromatics (BTE&X) and ' methyl tertiary butyl ether (MTBE) The results of the laboratory analysis are contained in Table i - 4nalytical Results Of Soil Samples 2 1 2 GROUND WATER SAMPLE COLLECTION Grab ground water samples were collected from soil probe borings B-3, B-4, B-6 and B-7 utilizing a Geoprobe water sampling assembly Ground water was encountered in each probe boring at a depth of approximately 35-feet bsg Upon collection, ground water samples were transferred into three 40- ml EPA-approved VOA vials containing 0 5 ml 18% hydrochloric acid as a preservative, and a one- liter amber bottle Each sample container was labeled with the following information location, time, date and sampler's initials Each sample was logged on a chain-of-custody form, placed in a chilled container and transported to a state-certified Iaboratory for analysis for TPH-g, TPH-d, BTE&X and MTBE, as note above The results of the laboratory analysis are contained in Table 2 -Analytical . Results Of G7 ab Ground Water Samples I 213 LOGGING During probe boring activities, sample duplicates were monitored for the presence of organic vapor using an organic vapor meter with a photo-ionization detector (PID Thermo Environmental 580A, 10 0 eV, calibrated to isobutylene) and described on boring logs using the Unified Soil Classification System (USCS) Boring logs are summarized in Appendix A 2 1 4 EQUIPMENT DECONTAMINATION All sampling tools and brass sleeves used for sample collection were thoroughly rinsed with clean water after washing with a solution of Alconox All Geoprobe rods were cleaned prior to advancement of each probe boring f22 WELL INSTALLATION JULY 1997 2 2 1 DRILLING AND SAMPLING • On 16 through 18 rune 1997, five ground water monitoring wells (MW-5 through MW-9) and two SVE wells (VW-I and VW-2) were installed at the site utilizing a CME-75 truck-mounted drill rig 1