Laserfiche WebLink
20 July 2000 <br /> AGE Project No. 98-0456 <br /> Page 4 of 7 <br /> methyl tertiary butyl ether (MTBE), tertiary amyl methyl ether (TAME) and tertiary butyl <br /> alcohol (TBA) by EPA Method 8260 Modified. <br /> • Polychlorinated biphenols (PCBs) in accordance with EPA Method 8080 modified. <br /> 3.1.2 . Ground Water Sample Collection <br /> Following collection of soil samples from boring B-1 and AB-1, ground water was encountered at <br /> approximately 50 feet, as inferred from saturated soil samples collected at 50 feet bsg, at which point <br /> a Geoprobe water sampling assembly, equipped with a slotted PVC screen, was advanced into the <br /> boring to a depth of 54 feet bsg. The PVC screen was then exposed to the saturated soil. Ground <br /> water was allowed to enter the casing and a water sample was retrieved using a modified PVC tubing <br /> .r bailer. A sample was then drawn to the surface. The grab ground water sample was transferred into <br /> a laboratory-supplied 40-m1 EPA-approved volatile organic analysis (VOA) vials containing 0.5 ml <br /> 18%hydrochloric acid as a sample preservative and from boring B-1 into one 1-liter amber bottle. <br /> The sample containers were labeled with the sampling identification(boring location,time and date). <br /> The samples were placed in a chilled container. <br /> The water samples were analyzed for the analytical constituents referenced in 3.1.1. <br /> 3.1.3. Equipment Decontamination <br /> Prior to sample collection, Geoprobe soil and ground water sampling equipment was thoroughly <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 /> 3.1.4. Logging <br /> w <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 /> 3.2. WELL SURVEY <br /> AGE conducted a reconnaissance for visible potential receptors (noting well address and location), <br /> a review of files and records available from the San Joaquin County Public Health Service - <br /> Iwo Advanced GeoEnvironmenfal,Inc. <br /> LO <br />