Laserfiche WebLink
27 September 1999 <br /> AGE-NC Project No. 97-0327 <br /> Page 5 of 9 <br /> r, <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 /> 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 /> 4.0. FINDINGS <br /> K <br /> Soil descriptions were utilized to construct the cross section presented in Figure 3. Laboratory <br /> analysis of thirteen soil samples detected total petroleum hydrocarbons and MTBE in one soil <br /> sample; BTEX compounds were detected in two soil samples. Laboratory analysis of one grab <br /> ground water sample detected dissolved TPH-g, TPH-d, BTEX compounds and MTBE. <br /> 4.1 SOIL PROFILE <br /> Generally, brown, dry to saturated, fine sandy silt was encountered from 15 feet bsg to depths of <br /> approximately 55 feet bsg. Saturated soil was first encountered at a depth of 35 feet bsg in boring <br /> P-8; ground water levels were measured at 521/2 feet bsg utilizing a Geoprobe water level meter. <br /> Boring logs are included in Appendix A; general lithology beneath the site in cross sectional view <br /> is depicted on Figures 3. <br /> 4.2 FIELD EVIDENCE OF HYDROCARBON-IMPACTED SOIL AND GROUND WATER, <br /> Faint to intense hydrocarbon odor was noted in duplicate soil samples collected p p o ected from P-8 at depths <br /> between 40 feet bsg and 55 feet bsg. Petroleum hydrocarbon odor is noted on boring logs contained <br /> in Appendix A. = <br /> Organic vapor was detected in soil sample duplicates from P-5, P-7 and P-8 using a PID at <br /> Iconcentrations as high as 225 parts per million (ppm). Organic vapor field measurements are <br /> summarized on the boring lags'contained in Appendix A. <br /> Advanced CeoEnvironmenlal,Inc. <br />