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2011-221
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Last modified
2/17/2016 11:56:27 AM
Creation date
10/1/2015 2:57:22 AM
Metadata
Fields
Template:
Official Documents
Official Document Type
Second Amendment
Approved Date
10/18/2011
Control Number
2011-221
Agenda Item Number
15.B.3
Entity Name
Geosyntec Consultants
Subject
Amendment No.2 to Work Order No. 29
Former Gifford Road Landfill
Area
Gifford Landfill South Gifford Road Plumr
Supplemental fields
SmeadsoftID
10297
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Mr. Himanshu H . Mehta, P . E . <br /> 30 September 2011 <br /> Page 4 <br /> The wells will be developed until visually free of particulates , as observed by the on- site <br /> Geosyntec representative . It has been assumed that the well installation and development <br /> activities can be completed in five field days . <br /> Any soil investigation -derived waste (IDW), consisting of soil cuttings from well installation , <br /> will be placed in 55 - gallon drums, labeled , and placed at the Gifford Road Landfill for disposal <br /> by IRC SWDD . Any liquid IDW, including development water, will be transferred into the <br /> IP& T system and pumped into the IRC sanitary sewer system following treatment through the air <br /> stripper. <br /> Phase 3 — Iniection Activities <br /> EOS ® 598 has been selected as the optimal electron donor for this site . Based upon calculations <br /> presented in the RAPM Addendum No . 2 , EOS® 598 will be injected by Geosyntec personnel as <br /> a dilute solution directly into the injection wells and will remain active in the subsurface for a <br /> period of up to five years . The EOS® dosage will consist of the injection of twenty (20) 55 - <br /> gallon drums of EOS ® 598 solution at transect one, thirty- five (35 ) 55 - gallon drums of EOS® <br /> solution at transect three , and twenty-three (23 ) drums of EOS® solution in the former source <br /> area . The EOS® 598 solution will be diluted with site groundwater, with the injection of <br /> approximately 500 to 1 , 203 gallons of solution to each well . <br /> The electron donor solution will be delivered to each injection location via a trailer-mounted <br /> injection system which includes a mixing tank and centrifugal pump connected to a manifold that <br /> includes individual flow meters , pressure gages, and ball valves . During the performance of the <br /> injection work at each location, information regarding the injection start time , finish time , <br /> volume injected, and injection pressure will be recorded by Geosyntec personnel . It has been <br /> assumed that the injection activities can be completed in 18 field days . <br /> Phase 4 — Reporting <br /> Implementation of RAPM Addendum No . 2 will be summarized in the semi- annual groundwater <br /> monitoring report that follows completion of the implementation activities . UIC monitoring will be <br /> included with the semi- annual sampling events until criteria are met. Performance monitoring of <br /> CVOCs and TOC will continue to be included as part of the semi- annual sampling events . A limited <br /> budget has been included herein to incorporate a description of these activities and a summary of the <br /> results into the currently authorized semi- annual groundwater monitoring reports . <br /> UIC and Performance Monitoring <br /> Underground injection control (UIC ) monitoring is required after injecting remedial fluids into the <br /> aquifer according to Chapter 62- 528 of the Florida Administrative Code (F . A . C . ) . UIC monitoring <br /> XR11055\XRl 1072 <br /> engitice, rs ( ` t ictin st s ( irinovators <br />
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