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Record of Decision System (RODS)



Address:  1500 S TIBBS AVE 
City & State:  INDIANAPOLIS  IN  46241
County:  MARION
EPA ID:  IND000807107
EPA Region:  05
NPL Status:  Currently on the Final NPL
ROD Type:  Record of Decision
ROD ID:  EPA/ROD/R05-92/197
ROD Date:  06/30/1992
Operable Unit(s):  01
Media:  Ground Water
Contaminant:  VOCs, Other Organics, Metals, Inorganic
Abstract:  SITE HISTORY/DESCRIPTION: The 120-acre Reilly Tar & Chemical (Indianapolis Plant) site is a former coal tar refinery and creosote wood treatment plant located in Indianapolis, Indiana. The site is divided into the 40-acre Oak Park property and the 80acre Maywood property. The Oak Parkproperty contains the majority of the operating facilities, including above- ground storage tanks, distillation towers, and aboveground and underground utilities. The Maywood property contains operating facilities on its northern end. This property was formerly the site of chemical process and wood preserving activities and currently contains four waste disposal areas. The area surrounding the site is mixed residential, industrial, and commercial. The site lies within the White River drainagebasin. From 1921 until 1972, coal tar refinery and creosote wood treatment plants operated onsite. Beginning in 1941, several chemical plants were constructed and operated on the Oak Park property. Environmental problems at the site were found to be related to the improper use and disposal of creosoting process wastes and substances used in manufacturing chemicals. In 1955, alpha picoline, a chemical manufactured onsite, was identified in nearby residential wells, and in 1964, three contaminants from the site were detected in offsite ground water samples and onsite surface water samples. In 1975, state investigations identified several onsite problems believed to be contributing to ground water contamination with organic chemicals. In 1980, state investigations revealed various organic chemicals in soil and subsequently in 1987, 60,000 gallons of waste fuel were accidentally spilled on the Oak Park property. The spilled fuel oil was recovered, and some of the contaminated soil was excavated. This ROD provides an interim remedy for OU1 and addresses offsite migration of contaminated ground water. Several additional operable units are planned to address contamination of onsite source and onsite and offsite ground water impacted by the site. The primary contaminants of concern affecting the ground water are VOCs, including benzene and toluene; other organics, including PAHs; metals, including arsenic, chromium, and lead; and inorganics. PERFORMANCE STANDARDS OR GOALS: Interim ground water clean-up levels are based on the more stringent of a 10[-6] cumulative lifetime cancer risk, or MCLs forcarcinogens; and MCLGs, MCLs, or a HI = 1 for noncarcinogens. Chemical- specific ground water goals include benzene 5 ug/1 (MCL); toluene 1,000 ug/l (MCL); xylenes 10,000 ug/l (MCL); pyridine and pyridine derivatives 35 ug/l (HI); arsenic 50 ug/l (MCL); chromium (MCL); lead 5 ug/l (MCL); and ammonia 30 ug/l (MCL). Treated ground water discharged to the POTW must meet separate clean-up criteria under CWA. INSTITUTIONAL CONTROLS: Not provided.
Remedy:  SELECTED REMEDIAL ACTION: The selected remedial action for this site includes either extracting contaminated ground water downgradient of the site and treating the water using biological treatment, followed by filtration and activated carbon adsorption, with offsite discharge of 5mgd to a POTW, with the remainder reinjected to the aquifer; or combining ground water extraction from up-gradient wells, with treatment using precipitation/clarification, followed by activated carbon, with reinjection to the aquifer in conjunction with extracting ground water from interior of the site, and treating this by precipitation/clarification, followed by air stripping, with offsite discharge to a POTW; monitoring ground water and implementing engineering controls. The final selection of options and specific design parameters will be determined during the remedial design, based on the results of treatability tests to determine the optimum design and operating requirements. The estimated present worth cost for this remedial action is $15,000,000, which includes an annual O&M cost of $1,000,000 for 30 years.
Text:  View full-text ROD [ 64K ]
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