CN-370000-GC653-T49D.pdf

This document package comprises a Petroleum Preapproval Program Task Assignment and supporting cost proposal materials between the Florida Department of Environmental Protection (FDEP), Division of Waste Management, Bureau of Petroleum Storage Systems, and AMEC Environment & Infrastructure, Inc. (AMEC). The task assignment GC653-049D is for remedial action activities at Karen's Kwik Stop (KWIK STOP-KAREN'S), a convenience store located at 730 East Main Street in Lake Butler, Union County, Florida. The facility (FDEP ID: 63/8517150) is contaminated with petroleum from a 12,000-gallon underground storage tank installed in 1993. The work is subject to Florida Statute Section 376.30711(1)(b), requiring FDEP preapproval prior to work commencement or cost incurrence.

The task assignment encompasses two primary events: Event 1 involves well installation including mobilization, drilling setup, four monitoring wells (DW-9, DW-10, DW-11, DW-12) at approximately 35 feet depth, one air sparge (AS) well at 25 feet depth, and one soil vapor extraction (SVE) well at 15 feet depth, with associated pilot test well documentation and interim reporting. Event 2 covers pilot test implementation and groundwater sampling, including a 32-hour pilot test (SVE only, AS only, and combined SVE/AS configurations), groundwater sampling from nine monitoring wells, water level measurements, and laboratory analysis using EPA-approved methods (BTEX/MTBE, PAHs, TRPH, lead, EDB). The fixed-price task assignment totals $40,542.27 (Event 1: $21,021.27; Event 2: $19,521.00) with a 10% retainage of $4,054.23. Equipment rental through GWTT (Groundwater Treatment & Technology, Inc.) is contracted at $4,860.00 for the two-day pilot test. Laboratory costs total approximately $3,287.02 through TestAmerica-Tallahassee. The work period extends from the last signature date through September 25, 2013, with no change orders authorized after that date.