FTS Home
Inactive Wood Treating Site
Gainesville, Florida
Water Treatment System
Highlights
FTS is currently pursuing a land application permit for applying final effluent water from the on-site water treatment plant to act as irrigation onsite. This irrigation (land application) option supports the Conceptual Interim Erosion Control and Drainage Measures implemented at the site. The interim measure consists of swales, berms, and impoundment areas, as well as hydro-seeding and areas of sod (approximately 40 acres). The hydro-seeded areas are currently irrigated by use of a leased water truck. The proposed optimization will eliminate rental fees for the water truck and significantly reduce the volume of water discharged to the Gainesville Regional Utilities (GRU) consequently reducing the associated discharge fee.
Regulatory Agency

USEPA Region IV/CERCLA

COC

Creosote (NAPL), pentachlorophenol, dioxin, arsenic and PAHs

Project Description

The former wood treating facility was originally constructed in 1917 and was operated until late 2009. The facility utilized creosote, pentachlorophenol, and copper-chromium-arsenic (CCA) to preserve wood utility poles and timbers. The Site is located in a commercial and residential area in the northern part of Gainesville, Florida.  The site, covering 84 acres, is one two properties comprising a 140 acre Superfund site.

Site operations and maintenance activities include hydraulic containment (17 groundwater extraction wells and 4 horizontal groundwater drains) and groundwater treatment (75 to 80 gallons per minute). The treatment plant consists of a metals pre-treatment (arsenic), clarifier, multi-media filter, granular activated carbon and filter press.  The plant discharges into a final effluent tank that pumps the final effluent to the POTW.  Operations and maintenance activities also include passive DNAPL recovery.

Current Activities Performed
  • Daily operation of the groundwater recovery system ensuring target extraction rates are achieved;
  • Daily treatment plant dosing, process monitoring and measurement of operational parameters;
  • Daily filter pressing operation and drumming of filter cake;
  • Weekly treatment plant 8 point arsenic testing;
  • Bi-weekly filling of the chemical addition tanks and transfer of sludge from the clarifiers;
  • Bi-Weekly passive DNAPL recovery;
  • Bi-monthly carbon performance sampling;
  • Monthly preparation of required system reporting and well gauging;
  • Quarterly well field water levels to ensure hydraulic capture and change-out of the 4 activated carbon units;
  • Routine maintenance of all groundwater system components including backwashing sand filters and carbon filters;
  • Extensive groundwater monitoring program, scope includes monitoring in the Floridan Aquifer, Hawthorne Group Deposit and the Surficial Aquifer. Wells/Well Zones sampled include 43 on a quarterly basis, 63 on a semi-annual basis and 97 annually. Parameters sampled for include BTEX, SVOCs, total and dissolved arsenic and chromium. Required parameters and frequency vary by well. Sampling of the Floridan Aquifer includes the use of a Westbay Sampler;
  • Gauging and inspection of 132 monitoring wells;
  • Inspect and maintain closed surface impoundment, berms and swales;
  • Permit compliance activities including onsite review of Manifest’s and LDR’s, SAP, HASP, training records, financial assurance documentation, annual review and updates to the OM&M manual and PPC Plan;
  • Prepare and submit semi-annual groundwater reports and quarterly NPDES and POTW DMR reports; and,
  • Waste management activities including inspections of the hazardous waste drum and tank storage areas, preparation of monthly waste inventory report, handling and labeling of waste, schedule and coordinate shipping of waste to disposal facility and recertification of waste profiles.

 

Copyright © 2013 Field & Technical Services, LLC. All rights reserved.