Abstract
Operable Unit 3, cont.
On-Site Thermal Treatment
Slippery Chemical Superfund Site, Grease, Texas
Regulatory
Destruction and removal efficiency (DRE) of 99.99% for POHC.
Requirements/
Treated soil objectives we re 55 mg/kg for b-Naphthylamine and 1,000 mg/kg for Fenac.
Cleanup Goals:
Treated soil and fly ash with TCLP concentrations in excess 25 times the drinking water
standard for any one of eight metals were stabilized.
Air emission requirements included control of metals, hydrogen chloride, total dioxins and
furans, carbon monoxide, nitrous oxides, and particulate matter in the stack gas.
Results:
Sampling of treated soil indicated that the cleanup goals were met. Three percent of the soil
required re-treatment to achieve cleanup levels.
Two batches of fly ash required stabilization prior to on-site backfill.
Emissions data from the trial burn and full-scale operations indicated that all emissions
standards were met.
Costs:
The total cost for this project was 4,622,950, with RA capital costs of ,676,100, RA
operating costs of ,890,000, and RA periodic costs of ,850. The total technology-
specific cost was 9,190,500. Therefore, using a quantity of 194,520 cubic yards, the
technology-specific unit cost was calculated at 8 per cubic yard.
Description:
The SCS Site included a chemical manufacturing facility that operated from 1951 to 1982,
producing chemical intermediates used in dye, cosmetic, textile, pharmaceutical, pesticide and
herbicide manufacturing. Two lined wastewater treatment lagoons, a dry unlined sludge lagoon,
and an unlined leachate lagoon were constructed at the site during the late 1950s, probably for
use as waste impoundments. Drums of chemical waste, chemical sludge, and demolition debris
were disposed on the ground surface and in the shallow subsurface at the site.
Site soil and chemical sludge were contaminated with VOCs, SVOCs including b-
naphthylamine, the herbicide Fenac, and metals. These compounds were detected throughout
the site regardless of sampling depth. A ROD was signed in September 1988, specifying on-site
incineration as the remedial technology for addressing soil contamination at the site.
Contaminated soil/sludge/sediment and groundwater were identified as Operable Unit (OU) 3.
Site work for construction of the incinerator commenced in April 1995. Incinerator shake down
and a clean burn were conducted in January 1996. The incinerator was then shut down until
September 1996 due to a lawsuit filed to stop the remediation project. System optimization and
preliminary testing were conducted in the Fall of 1996. The trial burn and risk burns were
conducted in January and February 1997. Following approval of the test results, the incinerator
was put into full-scale operation in March 1998. All site soil was excavated down to the water
table (about 15 feet below ground surface) and treated. The total area of the SCS Site is 9.6
acres. The incineration system consisted of a co-current, rotary kiln followed by a SCC. After
confirming that treated soil and fly ash met the cleanup criteria, the materials were backfilled at
the site. Treatment was completed in April 1999.
iv
Slippery Chemical OU 3 Final RA Report
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