Pigment Plant

The lagoon is de-watered, and residue is scraped from bottom and sides of liner.

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Project Details:

• Client: Former Pigment Plant, Pennsylvania
• Contaminants: Hexavalent and Trivalent Chromium
• Regulatory Agencies: EPA; Pennsylvania Department of Environmental Resources
• Contract Value: Approximately $270,000

Related Services

• Waste Management

Background

This project entailed drainage of 260,000 gallons of standing water from 4 lagoons, disposal at a local POTW (Public-Owned Treatment Works), and subsequent closure. Time frame for completion was a critical factor.

Closure of four settling lagoons used to treat wastewater from a former pigment plant involved a hazardous waste aspect hexavalent and trivalent chromium. MARCOR was selected by the owner and the consulting engineer, Roux Associates, Inc., because of an impressive history of work with Roux on other projects and a longstanding ability to accomplish work on schedule. This project had to be accomplished within a five-week time frame, without a source of potable water on site. The entire project would be performed during one of the worst periods of drought in Pennsylvania State history.

Job Description

After removal of standing water and sediment, small, concrete structures used for regulating flow from the lagoons to discharge points on a nearby river were demolished with hydraulic hammers mounted on backhoes. All pipes leading from the lagoons were sealed with hydraulic cement.

MARCOR revived a former river pumping system and utilized river water for the decontamination and hydroseeding components of the project. Critical capping procedures completed the job.

Following perforation operations, each lagoon was lined with geotechnical fabric to provide stability for the soils that would be added. The lagoons were backfilled with 6,500 tons of PADOT 2RC. This material not only provided for future drainage of surface waters, but it also offered the advantage of a 95% compaction rate and associated geotechnical strength to support vehicular traffic over the former lagoon area. All 2RC soil was installed in twelve-inch lifts and tested by a third party geotechnical firm to ensure that the 95% compaction criterion was met. The area was graded to engineer-specified elevations, and a six-inch layer of topsoil was added. MARCOR then subcontracted a firm to hydroseed the area with a rye/bluegrass mixture, which sprouted in two weeks.

For additional information, call MARCOR's corporate headquarters at 1-800-547-0128 or send email to info@marcor.com.