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<br />. <br /> <br />. <br /> <br />. <br /> <br />I <br />Lu <br /> <br />Based on the results of this investigation, total arsenic in soil was the only matrix and chemical of concern for the study area. <br />Applying the established SCTLs for arsenic the area of potential impact was defined both vertically and horizontally allowing <br />source removal approach to be designed. This design was presented to and approved by the FDEP. Approximately 1,000 cubic <br />yard of arsenic impacted soil were recovered and transported off site for disposal. A series of conformation samples were <br />collected from the sides and base of the excavation areas to document the complete removal of the impacted soils. A natural <br />attenuation/monitoring only (NA/MO) plan was developed and approved by the FDEP providing for the quarterly sampling of <br />monitoring wells for 1 year. <br />Five permanent monitoring wells were constructed in former impact area and sampled/analyzed for total arsenic. Elements of this <br />project that benefited our client include: <br />. Rapid negotiation and approval of regulatory document from the FDEP <br />. Innovative use of 0.006 inch slot well screen to reduce impacUfalse readings as a result of groundwater sample turbidity <br />. Quick implementation of the NA/MO allowing the site investigation groundwater sample results to be used as the first quarterly <br /> monitoring event <br />. Reduced project costs and schedule <br /> 25. FIRMS FROM SECTION C INVOLVED WITH THIS PROJECT <br /> (1) FIRM NAME (2) FIRM LOCATION rCitv and State) ROLE <br />a. Shaw Environmental, Inc. Clermont, Tampa, FL Prime <br /> <br />STANDARD FORM 330 (6/2004) PAGE F-2 <br />