Laserfiche WebLink
�.l 05 October 2000 <br /> AGE-NC Project No. 95-0197 <br /> ' Page 4 of 6 <br /> ' 3.1.2 Ground,Water Sample Collection, <br /> Grabground water samples were collected- from B-9'and B-10 using a temporary PVC screen. <br /> Ground water samples were not collected from borings.B-7 and B-8. The probe-rods were advanced <br /> ' to a depth approximately four feet below the"water table.'The hollow steel rods were then pulled out, rJ <br /> � �P mY <br /> and a screened casing was inserted into the saturated zone. Groundwater was allowed to enter the <br /> casing, and samples were retrieved-using a modified PVC tubing bailer. Sufficienf saznple,was <br /> collected from borings B-9 and B-10 to fill three 40-m1 EPA-approved VOA vials'containing 0:5 ml <br /> .18% hydrochloric acid as a sample preservative and into 1-liter amber bottles,without sample <br /> preservative. Ground water sample containers were labeled with probe boring 'designation;.date,; <br /> time, and samplers initials:,, <br /> .. <br /> The preserved'samples were logged on a chain-of-custody form; placed in a chilled'contalner-and ' <br /> transported to.a DHS-certified laborato'ryand were anal ` e'd•for: <br /> TPH-g and TPH-d by EPA Method 8015Modlfied <br /> a. BTEX with.MTBE by EPA Method'602; and <br /> o` TBA, DIPE, ETBE, TAME and MTBE by EPA Method 8260 Modified ' <br /> 3.131., Equi relent Decontamination' <br /> Prior to Samplecoliection, Geoprobe soil.and ground water saTplip'g.equipment was thoroughly <br /> rinsed with.clean water•after washing with a solution_of Alconox. Geoprobe rods were thozoughly, <br /> cleaned prior 6 soil,probe boring advancement.; <br /> a <br /> 3.1.4-' Logging <br /> ' During drilling activities,,sample'duplicates were monitored for the•presence of organic'v'apor,usilig' <br /> an organic,vapor•meter equipped with a photo-ionization detector (PID: Thermo Environirlentai <br /> ' 580A, 10.0,eV,calibrated'to isobutylene) and were visually-described on.boring logs in accordance <br /> -with the Unified'Soil'Classification System {USCS}. Boring log's are:included'as Appendix A.', ; <br /> ,,` ,.. .-., - ... ,4... =.v [• ' ' 1 1'- ' - , .. .. , 4L 'i. n +A 'SY...o.to "{ , 4a1 .k rr .. m^- ,..i <br /> 4.0: FINDINGS <br /> Soil descriptions were utilized to construct the vertical„and lateral soil model; laboratory analysis of, <br /> •soil and ground wafer samples were utilized to assess the hydrocarbon-impact on the two media.' <br /> Advanced GeoEnvironmental,Inc.- <br />