ARCHIVED REPORTS_XR0004131 - Laserfiche WebLink

Home Browse Search

1 Site Background Information Flame Mini-Mart Page 3 of 4 1 Penetrometer Testing(CPT)Report-November 2001 , dated 21 June 2002)was submitted ' by AGE to the SJCEHD • July 2003 - Ground water monitoring wells MW-6 and MW-7 were Installed at the site to ' depths of 65 feet bsg and 90 feet bsg,respectively, installation of off-site well(MW-5)was not conducted due to permitting issues TPH-g was detected in the 25-foot soil sample from MW-6 and the 50-foot soil sample from MW-7 at concentrations of 0 mg/kg and 12 mg/kg, ' respectively, MTBE was detected from MW-7 at depths between 50 feet and 90 feet bsg at concentrations as high as 28 mg/kg,respectively,TAME was detected in the 50-foot and 70- foot soil samples from MW-7 at concentrations of 0 11 mg/kg and 0 011 mg/kg,respectively, ' TBA was detected from MW-7 in the 50-foot soil sample at a concentration of 2 9 mg/kg Laboratory analysis of initial water samples collected from MW-7 detected MTBE at a concentration of 16µg/1 A report of findings(Quarterly Report-Third Quarter 2003, dated ' 02 February 2004)was submitted by AGE to the SJCEHD • December 2005 - Ground water monitoring well MW-8 was installed at the site to a depth ' of 65 feet bsg, soil vapor extraction wells VW-1 through VW-4 were installed at the site at depths between 50 and 55 feet bsg, soil boring B-5 was advanced at the site to a depth of 70 feet bsg TPH-g was detected in soil samples collected from B6(VW-2)-30/45/55, from ' B7(VW-1)-30/40/50 and from B9(VW-4)-40/50/60 at concentrations as high as 22 mg/kg Ethylbenzene was only detected from B6(VW-1)-55 foot soil sample at a concentration of 0 11 mg/kg MTBE was detected in soil samples collected from B5-40/55/70, from B6(VW-2)-20/30/45/55/65, from B7(VW-1)-20/30/40/50/65/70 and from B9(VW4)- ' 25/40/50160 at concentrations as high as 21 mg/kg TAME was detected in soil samples collected from B6(VW-2)-55 at a concentration of 0 80 mg/kg and from B7(VW-1)-30/50 at a concentrations of 0 062 mg/kg and 0 33 mg/kg, respectively A report of findings (Quarterly Report-Fourth Quarter 2005, dated 10 February 2006)was submitted by AGE to the SJCEHD • April 2006-An eight-hour soil vapor extraction(SVE)pilot test was performed at the site, the SVE pilot test was conducted by applying a vacuum at SVE well VW 1 (screened between 30 and 50 feet bsg), and collecting induced vacuum measurements from observation wells VW-2 through VW-4 and MW-1 through MW-4 TPH-g was detected in the Influent soil- vapor samples at concentrations as high as 12,000 gg/l,benzene,toluene,ethylbenzene and ' total xylenes were detected in the soil-vapor samples at concentrations as high as 4 7 µg/1 benzene, 12 µg/1 toluene, 58 µg/1 ethylbenzene and 200 µg/l total xylenes MTBE was detected at concentrations as high as 5,000 µg/1 Based upon an effective vacuum potential of 0 1 Inches of water, the theoretical effective radius of influence of SVE at the site was projected at 42 feet Results of SVE pilot test were reported in Soil Vapor Extraction Pilot Test Report-April 2006, dated 17 May 2006 I Between November 1999 and March 2006, twenty-four ground water monitoring events were Advanced GeoEnvironmental,Inc