Laserfiche WebLink
l-fieofogicaf7echnres Znc. �.J Page 4 <br /> Former Moresco Property-IRAP <br /> Project No. 251.3 <br /> April 8, 1997 <br /> • Once a month sample collection of influent and effluent samples for analytical <br /> evaluation. <br /> Note: This monitoring schedule is required by S.IVUAPCD. <br /> LO Inspection events will include monitoring all performance functions of the treatment system <br /> and measuring and recording air flow, temperature, and screening the influent air with an <br /> organic vapor meter (Thermo Environmental Instruments Model 580B with a 10.2 eV <br /> ,r photoionization lamp, calibrated to factory specification with a 100 ppm concentration of <br /> isobutylene gas). <br /> A log will be maintained on site that will list cumulative operating hours, OVM monitoring <br /> data, regeneration events, and an estimate of the amount of hydrocarbons removed per day. <br /> We expect to achieve a significant reduction of gasoline from the soil in a 6 to 8 month <br /> .. period of operation. <br /> 3.0 ASSESSMENT OF REMEDIAL EFFECTIVENESS <br /> Because this interim remediation is designed primarily to achieve source reduction at the <br /> depth of the highest contamination near the point of release it is expected that the existing <br /> +-� network of wells may not affect all impacted areas. That is anticipated since the goal is <br /> partial remediation and not complete removal. <br /> ,r Regular influent emissions testing will monitor the attenuation of volatile organic compounds <br /> remaining in the ground and a radial influence test will monitor the effectiveness of the <br /> remedial efforts. <br /> 3.1 Radial Influence Test <br /> Radial influence testing can provide valuable information regarding system operation. <br /> During the influence test the air-recharge wells are capped with an airtight cap fitted with a <br /> sampling port. Vacuum gauges are attached to the ports while the treatment system is in <br /> operation. The air-recharge wells are opened and closed in different combinations in order to <br /> determine which combination produces the largest radius of influence and best cross site <br /> vapor flow. <br /> 3.2 Removal Volumes <br /> OVM data and air flow rates will be tracked during the operation of the treatment unit. <br /> Calculations will be made to determine the volumes of gasoline removed and volume still left <br /> Lo in the soil. Initial mass balance calculations show approximately 1,675 gallons of gasoline in <br /> the soil. <br /> 4.0 SCHEDULE & REPORTING <br /> Geological Technics Inc. anticipates beginning work within 30 days of the approval of this <br /> �• work plan. A report detailing well installation, analytical data and the radial influence testing <br /> will be submitted upon completion of the radial influence test. Monthly transmittal letters <br />