Laserfiche WebLink
r26 July 1999 <br /> . AGE-NC Project No 97-0301 <br /> Page 4 of 9 <br /> i <br /> amyl methyl ether (TAME), and MTBE by EPA Method 8260 Modified <br /> 1 <br /> 3 12 Ground Water Sample Collection <br /> Grab ground water samples were collected from P-1 through P-4 utilizing hydro-punch technology <br /> A Geoprobe water sampling assembly was advanced to a depth approximately four feet below the <br /> water table utilizing hollow steel rods The hollow steel rods were then retracted upward <br /> approximately four feet,thereby exposing a PVC screen to ground water A bailer fitting was then <br /> ' placed on the end of 3/8-inch diameter polyethylene tubing, inserted through the rod assembly into <br /> the exposed screen, through which water was manually pumped Sufficient sample was collected <br /> 1 from bonngs P-1 through P-4 to fill three 40-m1 EPA-approved VOA vials containing 0 5 ml 18% <br /> hydrochloric acid as a preservative and one 1-liter amber bottle Ground water sample containers <br /> were labeled with probe boring designation, date, time, and samplers initials <br /> ' Each preserved sample was logged on a chain-of-custody form, placed in a chilled container and <br /> transported to a DHS-certified laboratory, selected samples were analyzed for <br /> ' <br /> • TPH-g and TPH-d b EPA Method 5030/8015M <br /> Y <br /> ' • BTEX with MTBE by EPA Method 602, and I <br /> • TBA, DIPE, ETBE, TAME and MTBE by EPA Method 8260 Modified <br /> 1 <br /> 3 13 Equipment Decontamination <br /> Prior to sample collection, Geoprobe soil and ground water sampling equipment were thoroughly <br /> p <br /> rinsed with clean water after washing with a solution of Alconox Geoprobe rods were thoroughly <br /> cleaned prior to soil probe boring advancement <br /> 314 Logging <br /> During drilling activities, sample duplicates were monitored for the presence of organic vapor using <br /> an organic vapor meter equipped with a photo-ionization detector (PID Thermo Environmental <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 logs are included as Appendix A <br /> General lithology beneath the site is depicted in cross sectional view on Figure 3 <br /> AAanced GeoEnviron mental,Inc <br />