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JCG was awarded the contract to remove sludge from an existing affluent sediment basin which was to remain in operation during construction activities.  The following dredging activities included:

• Removal of sludge from pond

• The set-up of a pumping operation to pump sludge material to an adjacent wetlands area as part of a closure plan

JCG worked at this site for four consecutive years, performing remedial construction activities.

The alliance between JCG and the owner allowed the owner/contractor project team to perform the work in the most cost effective manner.  While onsite, JCG performed numerous remedial construction activities which included pond drying, landfill cell construction and landfill closure, and other environmental related projects.

The pond project required several earthwork processing activities.  The scope of work included the dewatering and drying of contaminated sludge material located in the Pre-Equalization Pond, Oily Water Sludge Pond, and the Equalization Pond.  Construction activities included:

• Dewatering of ponds

• Processing and drying hydrocarbon sludge

• Stabilization with fly ash reagent, then air dried

• Berm construction

JCG personnel were required to perform the work in “fresh air” at all times.

Remediation, construction and maintenance for this “superfund” (hazardous waste) site has been ongoing since 1987.  T.L. James Industrial was one of the prime contractors for over 10 years.   JCG’s overall scope of work included site preparation, haul roads, piling, bridges, flood protection levees, hazardous waste excavation, fugitive emission controls and ground water recovery systems for the 45 acre site.  Key components of the project are listed below: 

• 35,000 linear feet of perforated HDPE piping in the bottom of a contaminated cypress swamp

• Trenching, sheet piling, installation of pipe, and the backfill of the trench were all accomplished while working under 4 to 6 feet of water to minimize volatile emissions

• Installation of 180,000 square feet of geogrid and over 600,000 cubic yards of clay and sand fill
• Excavation and removal of contaminated sediments from over 2,700 linear feet of Baton Rouge Bayou
•  Installation of 350 ground water recovery wells

This project required the use of an extensive health and safety plan, 29 CFR 1910.120 training, and the use of levels D, C, and B personnel protective equipment.

The project site consisted of a 100 acre ash pond with an existing 23 foot high containment dike.  The purpose of the pond is to collect ash which is a by-product of coal combustion used to generate electricity. Also, plant waste streams are commingled in this pond.  Geotechnical studies revealed the operating water level of the pond could not be increased without a significant dike reinforcement.  The scope of work included:

• Installation of geogrid reinforcing material along the inside toe of the existing dike

• Cut and fill operations of approximately 45,000 cubic yards of clay and ash

• Installation of 6900 LF of cement bentonite slurry wall within the existing dike at approximately 55 vertical feet

• Placement of 139,872 cubic yards of geogrid within each compacted layer of fill material throughout the length of the reconstructed dike