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<br />Site F is located just east of Snelling Avenue and south of the central part of TCAAP. The site contains about 10
<br />acres, and was apparently held burning kettles, plates and tanks for disposal of scrap powder and ordnance. The site
<br />also had pits for burying cyanide pots and mercury crack cases. The ash and residue from burrting were dumped on
<br />the surface and casings were buried in trenches. Soil at Site F is contaminated primarily with metals, with isolated
<br />zones ofVOC contamination. Groundwater shows the presence ofVOCs but no significant metal contamination.
<br />
<br />Interim Remediation, Soil washing and soil leaching are currently being conducted to remove metals from the
<br />soil. This procedure occurred in October- November 1983, May - October 1994, andApri1- July 1995, when
<br />soil washing/leaching was completed. VOC contamination in the soil still exists. Most oftheVOC-contaminated
<br />soil has been stockpiled and covered. It is anticipated that this contaminated soil will be treated at the smelter
<br />that is now reclarnating the metals.
<br />Draft Feasibility Study Recommended Alternative: None, since this site is near closure.
<br />
<br />Site G is located east of Snelling A venue and south-southeast of thc central part of TCAAP. It contains an
<br />irregularly shaped landfill that was used as a durnp site for rubble, asphalt pavement, barrels, oil filters, etc.
<br />Contanrinants of concern include solvents, VOCs and heavy metals. Soil at this site is contaminated with VOCs and
<br />metals. Groundwater has detectable levels ofVOCs.
<br />
<br />Interim Remediation, An eighteen-inch clay cap and SVE system were installed in late 1985. The SVE system
<br />went into operation in February 1986.
<br />Draft Feasibility Study Recommended Alternative: Continue existing SVE, expand SVE with deep vents and
<br />institotional controls.
<br />
<br />Site H is located in the southeastern comer ofTCAAP on the northwest side of Sunfish Lake. Site H was a burrting
<br />site with a burning cage in the middle. The cage was used to bum primarily Class A combustibles ( wood, paper,
<br />cardboard, and burnable trash). Other materials, including solvent-contaminated maizo, were also burned at Site H.
<br />Contaminants of concern include solvents, metals, explosives, VOCs, PCBs, semivolatiles, and dioxins. Surface
<br />soils at the site have metal contamination. VOC contamination was detected via a soil gas survey. Copper
<br />contamination was measured in sediments at Site H. Low levels ofVOC contamination may be present in the
<br />groundwater at this site.
<br />
<br />Interim Remediation: No remediation has been conducted at this site.
<br />Draft Feasibility Study Recommended Alternative: Excavation, soil washinglleaching, other materials
<br />handling, backfilling.
<br />
<br />Site I consists of Building 502 and its associated structures and facilities. The site is located about 700 feet north of
<br />the southern boundary ofTCAAP, near the intersection of Highways 96 and 10. Sewer disposal of oil and grease,
<br />metal griodings, heavy metals and solvents occurred at this facility. Contaminants of concern include PCBs, VOCs,
<br />heavy metals, and uranium. Soil and groundwater contamination and sewer sediment contamination are concerns at
<br />this site.
<br />
<br />Interim Remediation: In August 1987, a Unit 3 groundwater collection/treatment system, known as TGRS
<br />(TCAAP Groundwater Recovery System), was installed.
<br />Draft Feasibility Study Recommended Alternative: Extraction well pwnping, POTW discharge, monitoriog.
<br />
<br />Site J is a portion of TCAAP's sanitary and storm sewer system. It is located along the southern and southwestern
<br />borders ofTCAAP. Potential contaminants include oil and grease, metals, heavy metals, solvents, explosives,
<br />lacquers, thinners and metal shavings. No metal contamination greater than the action criteria was found in the
<br />groundwater at this site. Sporadic VOC contamination was detected in monitoriog wells around Site J. No VOC,
<br />PCB, semivolatiles, or other organics were present in soil boriogs. Low levels of metals were present in all boriogs.
<br />
<br />Camiros, Ltd./SEH. Inc./LHDL, Ltd.
<br />
<br />TeMP Framework Plan
<br />Page 27
<br />
<br />Chapter II
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