ARCHIVED REPORTS_XR0007240 - Laserfiche WebLink

Home Browse Search

[ I I ud#7017 i0 glitz 1"tn n)tt ima tI R(111CdId It.,is11)[IRN I(,tit Rq>01 r Wjiu Ott 2 ) 200 ' vapor extracted during the VEW-2 (upper soil horizon) test indicated concentrations of approximately 17,000 ppmv VFH, 430 ppmv benzene, 1,500 ppmv toluene, 140 ppmv ethylbenzene, and 640 ppmv ' total xylenes The vapor sample laboratory analytical results are summarized in Table 8 A copy of the laboratory analytical report is provided in Appendix G 1 Based on the data collected from the VEW-1 and VEW-2 tests, the anticipated removal rate of volatile ' fuel hydrocarbons during initial remedial system start up (with an estimated average influent concentration of approximately 22,500 ppmv and a flow rate of approximately 345 cfm into a thermal ' oxidizer) would approach approximately 2,800 pounds of hydrocarbons removed per day However, the preceding calculation does not take into account the necessity of adding dilution air to a thermal oxidizer in order to regulate and optimize the system Therefore, the actual removal rate may be lower Based on the VE test results, a remedial system incorporating VE would be an effective treatment technology for ' the remediation of petroleum hydrocarbon impacted soil beneath the site I ' 4 3 AQUIFER PUMP TESTING On November 20 and 21, 2002, Blaes Environmental conducted two limited aquifer pump tests at the ' site The ob3ective of pump testing was to collect data necessary to evaluate the feasibility of extracting water from individual wells for above-ground treatment The pump tests were performed on ' groundwater monitoring wells MW-6C (screened from 70 to 90 feet bgs) and MW-3C (screened from 75 to 100 feet bgs) (Figure 2) Groundwater was purged from each well using a 0 5 horsepower MPI ' Grundfos pump 4 3 1 MW-6C Pump Test ' On November 20, 2002, Blaes Environmental began the MW-6C pump test Prior to commencing groundwater pumping, a Solinst data logger was installed in the extraction well in order to monitor static ' groundwater level changes Additionally, a second data logger was placed in monitoring well MW-6B (screened from 52 to 72 feet bgs) to monitor static level changes in the groundwater at a point near the ' extraction well (Figure 2) The Grundfos pump was installed to approximately 70 feet below the top of the MW-6C well casing The MW-6C and MW-6B data loggers were installed to approximately 80 feet and 68 feet, respectively, below the top of individual well casings Prior to pumping, a Fill-Rite Series ' 14 1