Laserfiche WebLink
<br />No surface water sediment is associated with this site. However, sewer sediment is an issue. <br /> <br />Interim Remediation: In 1984-86, approximately 50% of the sanitary sewer system (42,000 linear feet) was <br />cleaned, inspected and tested. The sludge removed from the lines was hauled to a permitted hazardous waste- <br />disposal site in Ohio. Additional samples were collected in April 1992. <br />Draft Feasibility Study Recommended Alternative: None. The site was closed in 1993. <br /> <br />Site K is located in the western portion ofTCAAP and occupies approximately 21 acres consisting primarily of <br />Building 103. Potential contaminants include solvents, PCBs, semivolatiles and metals. Groundwater at this site is <br />contaminated with VOCs and low concentrations of metals. Surface water samples collected from nearby Rice <br />Creek showed no VOCs, metals or radionuclides above the action criteria. No VOCs or sernivolatiles were detected <br />at concentrations above the detection limits in sampled sediments. Soil contamination has been detected within the <br />Building 103 envelope. Soil contamination includes VOCs and metals. <br /> <br />Interim Remediation:A groundwater collection drain, purnp, and air stripper were installed July - September <br />1985. The remediation program continues to operate at the present time. <br />Draft Feasibility Study Recommended Alternative: Interceptor trench recovery, air stripping tower replaced <br />with shallow tray, NPDES permit, monitoriog. <br /> <br />Site 129-3 lies southwest of the intersection of Snelling and Upper Range Road near the center ofTCAAP. The site <br />was used for the flashing and disposal of contaminated wastewater, primarily from the lead styphnate primer mix <br />facility. A pit may also have been used for the disposal of mercurous nitrate. Potential contaminants include metals, <br />cyanide, and VOCs. Metal contantination was detected in the soils with minor amounts of VOCs. Groundwater data <br />indicate VOC contamination. No significant metal contamination was detected in the groundwater. <br /> <br />Interim Remediation: No remediation has been conducted at this site. <br />Draft Feasibility Study Recommended Alternative: Excavation, Soil washing/leaching, Other materials <br />handling, Backfllling. <br /> <br />Site 129-5 lies in the east central portion of TCAAP, just west of Harnline Avenue. The site covers about 4.5 acres <br />and was occupicd by farmsteads before TCAAP was constructed. Pits were established here for burrting explosive <br />wastes, spent solvents and wood. Evidence that the old farm foundations were used as disposal pits may be seen on <br />historical aerial photographs. Potential contaminants include metals, VOCs, explosives, dioxins, heavy metals and <br />solvents. Low to moderate concentrations ofVOC contamination in the soils were detected in the southeastern <br />corner of this site. Low levels ofVOCs have sporadically been detected in the groundwater. <br /> <br />Interim Remediation: No remediation has been conducted at tltis site. <br />Draft Feasibility Study Recommended Alternative: Excavate, transport to other on-site location, soil <br />washing/leaching at alternative location. <br /> <br />Site 129-15 is located east of Snelling Avenue near the intersection of Snelling and Reservoir Road in the central <br />part of TCAAP. This site was used as a landfill for construction debris. Contaminants of concern include solvents. <br />VOC contamination of soils may be present at this site. Groundwater data showed the presence ofVOCs. No <br />metals were detected in the groundwater at levels above the proposed action criteria. <br /> <br />Interim Remediation: No remediation has been conducted at this site. <br />Draft Feasibility Study Recommended Alternative: Excavation, transport to off-site TSDF, other materials <br />handling. <br /> <br />Deep Groundwater (Unit 3/4) contains Hillside Sand, which is a reddish brown mediurn-to-coarse sand aquifer <br />with occasional gravels, silty sands and red sandy tills. Unit 4 contains the Prairie Du Chien Group, which is a <br /> <br />Camiros, Ltd.lSEH, Inc.lLHDL, Ltd. <br /> <br />TCAAP Framework Plan <br />Page 28 <br /> <br />Chapter II <br /> <br />I <br /> <br />.- <br />- <br /> <br />I <br /> <br />I <br /> <br />I <br /> <br />I <br /> <br />I <br /> <br />I <br />.. <br /> <br />I <br /> <br />- <br /> <br />- <br /> <br />- <br /> <br />I <br /> <br />I <br /> <br />.- <br />I <br /> <br />I <br />