Laserfiche WebLink
03 August 1999 <br /> AGE-NC Project No. 95-0121 <br /> Page 2 of 2 <br /> AGE still believes that SVE can be a cost effective alternative to remediate adsorbed petroleum- <br /> hydrocarbon impact within the reduced vadose zone; AGE still believes that AS can be a cost <br /> effective method to remediate dissolved petroleum-hydrocarbons in ground water. However, the <br /> rising ground water elevations at the site have created a much thicker interval of impacted soil in the <br /> saturated zone that should be reassessed with additional pilot tests to evaluate feasibility of SVE and <br /> AS under current site conditions. The following additional pilot tests are needed to reassess site <br /> conditions and select the most cost effective remediation strategy for the site: <br /> • PhysicochenucalAnd Bioenumeration Analysis - Soil probe borings will be advanced using <br /> direct push technology (Geoprobe 5400 soil probing unit) for collection of soil samples. <br /> Selected soil samples will be analyzed by a microbiological laboratory for microbial <br /> enumeration and physicochemical analysis to determine feasibility of bioremediation at the <br /> site. Results of the bioremediation analysis will provide an evaluation of natural occurring <br /> micro-organisms and characterize physicochemical conditions at the site to support microbial <br /> growth and bioremedial activity. <br /> • Oxygen Release Compound (ORC) Pilot Test - A six-month ORC pilot test will be <br /> performed at the site. to evaluate general aerobic conditions at the site as well as the <br /> effectiveness of ORC when applied to a petroleum-impacted zone in saturated soil . ORC <br /> will be injected into the subsurface utilizing a Geoprobe 5400 soil probing unit and spaced <br /> equidistant from a ground water monitoring source area. Dissolved total petroleum <br /> hydrocarbon concentrations and dissolved oxygen will be tested routinely during the six- <br /> month pilot test to monitor remedial progress. ORC is a patented formulation of magnesium <br /> peroxide that time-releases oxygen to enhance bioremediation of soil and groundwater <br /> contamination under aerobic conditions. The naturally occurring aerobic microbes degrade <br /> organic hydrocarbon compounds into harmless by-products. <br /> Upon completion of all pilot tests, a report will be prepared to evaluate the remedial progress. It is <br /> at this time that the necessity for any additional remedial alternatives for hydrocarbon4rapacted <br /> soil/ground water at the site will be considered. <br /> Sincerely, <br /> Advanced GeoEnvironmental, Inc. <br /> 7Xt ne k 0 1 Cl <br /> Timothy J. ue <br /> Project Geologl t <br /> Enclosures <br /> Advanced GeoEnvironmental, Inc <br />