ARCHIVED REPORTS_XR0005007 - Laserfiche WebLink

Home Browse Search

i �04 August 2000 ' AGE-NC Pioject No 98-0521 Page 8 of 1 1 ' - 01 ganrc vapor s wet e detected in vaf sous samples fi omboi Ings B-3,B-4 and B-6 The highest of gantc vapor concentl ations in these bol Ings wet e 134 parts pet million (ppm) to sample 133-10, 53 ppm to sample_B4-1 0 and 140 ppm to sample 136-20 The vapor concentt attons at e included on the bot mg ' logs to Appendix A 42 HYDROCARBON-IMPACTED SOIL ` 'A total of twenty-one soil samples wet e analyzed fol TPH-g, BTE&X and MTBE Nine of these soil — samples Nve1 e analyzed for the suite of five fuel additives by EPA Method 8260 Modified • T_ PH_-g was only detected to sample B3-10 at a concentration of 3 4 mg/kg - BTE&X compounds wet e only detected in soil samples 136-25 and 137-20 located-under the - former UST excavation The concemr atlons of BTE&X compounds in 136-25 1 anged fi om - ' 0 007 mg/kg of benzene to 0 084 mg/kg of xylenes Sample 137-20 contained BTE&X compounds at concentl attons l.anging ft om 0 005 mg/kg of benzene and ethylbenzene to • 0 032 rig/kg of Xylenes - - • MTBE was detected-by EPA method 8020 in samples B3-15 and B4-10 at 0 48 mg/kg and 0 16 rnAg, r espectiN ely MTBE was r econfirmed by EPA method 8260N4 in sample 133-1 5 ' at 0 3 mg/kg MTBE was also detected in sample 133-20 by EPA method 8260M at 0 029 F { -mg/kg T\o o€het fuel oxygenates Ave1e detected 1n the sample analyzed by EPA method 8260M • MTBE was detected 3n sample B4-10 at 0 16 mg/kg(EPA Method 8020),also collected fi om _ east of the formes UST ar ea No detection of MTBE was found«est of south of the former ' - UST ai ea Labor atol y 1 esults of soil-samples analyzed fol. pets oleum hydt ocaibons ale surnmar/zed in Tables 2 _ and 3 Tlne laboratory lepol-ts (MAI Laboratory 1D 35112 to 35135) quality assurance and quality -- control (QA/'QC)-reports and chains-of-custody ale included in Appendrt D - 43 HYDROCARBON-IMPACTED GROUND WATER - A total of g eight r ab water samples were collected on the site After the installation of the three g -ground water wells on the site all three ground«-ate/ monitol.ing wells were sampled Each sample ' -mvas analyzed for TPH-g, BTE&X with analysis fol MTBE and the suite of five fuel additives - — - Id+ancr d Ccnl m ti o+tnur+t+l lilt