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Mr. Himanshu H.Mehta,P.E. <br /> 7 July 2014 <br /> Page 4 <br /> original concentration is confirmed then the stepout samples will be analyzed in two steps (5 ft <br /> stepouts,then 10 ft stepouts, if needed). <br /> Budget has been included for analysis of up to a total of 68 samples. Each soil sampling location <br /> will be surveyed for northing and casting using a Global Positioning System (GPS) unit with <br /> sub-meter accuracy. Soil samples will be collected in accordance with FDEP SOPs. It has been <br /> assumed that this effort can be completed within five days with a two-person field team. <br /> Subtask B: LFG Investigation <br /> This subtask includes the completion of a LFG investigation at the Site. Based on the observed <br /> depth to groundwater at the Site over the past two years, it has been assumed that the water table <br /> is present at approximately 3 to 5 ft BLS. The LFG investigation will be focused on the interval <br /> from land surface to the water table (i.e., vadose zone). Temporary LFG monitoring wells will <br /> be constructed of 3/4-in diameter pre-packed poly-vinyl chloride (PVC) wells with 5 ft or less of <br /> slotted screen and installed with a track direct-push technology (DPT) rig. This proposal <br /> includes installation of up to eight LFG monitoring wells at locations based on results of the <br /> historical records review, previous observations, and observations from the soil sampling, cover <br /> thickness, presence of waste evaluation results, and areas of potential development. The wells <br /> will be completed at the surface as a stickup with a sampling port at the top of the well. Tubing <br /> will be attached to the sampling port and a gas analyzer (such as a GA-2000) will be attached to <br /> the tubing to measure the concentrations of methane, oxygen, carbon dioxide, carbon monoxide, <br /> and hydrogen sulfide in the soil gas. The concentration of VOCs in the soil gas will be measured <br /> using a PID. Since there are historical VOC groundwater impacts at the Site, if VOCs in the soil <br /> gas are observed, up to three samples will be collected for submittal to the analytical laboratory <br /> for analysis of VOCs. Each LFG well location will be surveyed for northing and easting using a <br /> GPS unit with sub-meter accuracy. It is anticipated that this effort will take two days with one <br /> person in the field. <br /> Task 4 — Reporting: Under this task, Geosyntec will perform data evaluation activities and <br /> prepare an assessment report. Data evaluation activities will include database management, <br /> screening results against applicable regulatory criteria, and GIS figure preparation. The results <br /> of assessment activities will be discussed and supported by attachments containing field notes <br /> and observations, photographs, analytical results, and other applicable materials. The report will <br /> incorporate the preliminary assessment results and the results collected as part of the activities <br /> described herein. An evaluation of the human health risk related to the potential site end-uses <br /> will be included in the report. The draft report will be submitted to IRC SWDD for review. <br /> SCHEDULE <br /> Geosyntec will begin planning the assessment activities upon authorization of this proposal and <br /> should be able to initiate the fieldwork within approximately four to six weeks based on <br /> subcontractor availability. The field activities are anticipated to take seven days (five days with <br /> XR14096\XR 14053-RE V.docx <br /> engineers I scientists I innovators <br />