- A final Site Walk was held on January 10, 2019 by the USEPA OSC; the TRS Thermal Project Manager; and the HRP Program Manager for the Carter Carburetor Superfund Site to review the overall ERH ISTD/SVE Project, the specific goals and Performance Standard(s) and a review of the Site after the demobilization of the ERH ISTD/SVE equipment. Demobilization of the ISTD/SVE was deemed to be complete with no further field activities or Removal Actions planned at this time. ACF is entering the last phase of the project, with the DRAFT Removal Action Final Report due May 10, 2019; and
- The DRAFT Removal Action Final Report was submitted to USEPA Region VII on May 10, 2019.
- Delivery/installation of two (2) power control units, two (2) blowers, two (2) condensers, an RTO and scrubber, LGAC treatment system, and step down transformers, three (3) water storage tanks, and VGAC vessels;
- Installation of ISTD/SVE System: 187 electrodes, 5 hydraulic control wells, 12 temperature monitoring points, and 15 piezometers;
- Treatment zones for the ISTD/SVE system are as follows, in general: TZ-A (former TCE AST area), TZ-B (below North Spring Avenue) and TZ-C (below the CBI Building Slab); and
- Operation and daily maintenance of ISTD/SVE ERH system for the removal of ~25,000 pounds of TCE from the former TCE AST area, below North Spring Avenue and below the CBI Building Slab;
- Conducted two (2) rounds of targeted soil sampling events for TZ-A, TZ-B and TZ-C to confirm that the Performance Standard clean-up goal of 24,000 micrograms per kilogram (µg/kg) had been achieved;
- All analytical data indicated that the remediation efforts in the former TCE AST Area have been successful in meeting the Performance Standard(s) and cleanup goal.
- Continuation of Field Work from 2014/2015/2016;
- Collected additional soil samples in the TCE AST area, North Spring Avenue and CBI Building Slab to maximize the efficiency of the ISTD ERH system;
- Completed Die Cast Area Engineered Control (TSCA CAP);
- ACM Phase IV Abatement field activities – Final ACM Subsurface ACM assessment during CBI Building Subslab Investigation;
- Sub-Slab Demolition of CBI Building; and
- Preparation/installation of ISTD/SVE ERH system.
- Continuation of Field Work from 2014/2015;
- Completed removal of impacted building materials to off-Site location via Rail Transfer station;
- Completed demolition above grade portions of CBI/WILLCO Buildings;
- Beneficial reuse of impacted building materials to Die Cast Area excavation; and
- CBI Sub-Slab/Sub-Surface Investigation & Delineation.
- Demolition of the CBI and WILLCO Buildings by Ahrens Contracting, Inc.;
- North Spring Avenue Road closure July 13, 2015, Permit Number 80118 (issued 6/29/2015 @ 8:42:51AM);
- Building Separation Plan and Communication Plan rescinded;
- Non‐RCRA/Non‐TSCA debris and Non‐RCRA/Non‐TSCA scrap metal removal;
- Pb Abatement field activities, utilizing Dry Ice blasting techniques;
- ACM Phase I/II Abatement field activities complete in CBI/WILLCO Buildings and in the exterior soils associated with the CBI Building;
- ACM Phase III Abatement field activities coincide with demolition of CBI/WILLCO Buildings;
- Installation of Die Cast Area Shoring Wall by Schnabel Foundation;
- Excavation/off-site disposal of Die Cast Area TSCA soils (~50,000 tons material); and
- Boilers removed from former South Boiler Room during demolition of CBI Building.
- April 21, 2014 – Start of Remedial Activities in the Field at Carter Carburetor Superfund Site;
- ACM Phase I/II Abatement field activities by Midwest Service Group (MSG);
- Independent 3rd Party Air Monitoring by City Design;
- Minority Participation (boots on the grounds, documented) at Carter Carburetor Superfund Site, in excess of 45%;
- Completion of Utility disconnects;
- HRP replaces AMEC as General Contractor on August 8, 2014; and
- Submission by General Contractor and approval by USEPA(1), include, but are not limited to, the following:
- Health and Safety Plan;
- Quality Assurance Project Plan;
- ACM Abatement Work Plan for the CBI Building;
- Removal Action Work Plan (RAWP) with comments and conditions with review and comments by the Missouri Department of Natural Resources (MDNR);
- Addendum B Demolition Work Plan for the CBI Building;
- Demolition Work Plan for the WILLCO Building; and
- ACM Abatement Work Plan for the WILLCO Building.
- All Addendums and Work Plans submitted to the USEPA have been approved and are part of the record on the USEPA Region VII website.
2011 - 2013
- Universal Waste removal;
- Installation of Security Fence and Perimeter HiDef Security Cameras with Ground Radar;
- Issuance of USEPA decision documents, i.e. USEPA’s Enforcement Action Memorandum (EAM), March 30, 2011; and
- Preparation and Submission of QAPP, HASPs, RAWPs and documentation as required by USEPA.
2005 – 2010
- Prepared and submitted work plans for additional characterization of the Carter Site;
- Sampled concrete floor of the former North and South Die Cast buildings, the soils below the floor of the North and South Die Cast buildings, soils adjacent to the former location of Substation #4, and soils surrounding the underground storage tanks located north of the North Die Cast building. Submitted report to the USEPA as: Supplemental Environmental Field Investigation Report for the Former Carter Carburetor Site: PCB Delineation of the North and South Die Cast Buildings, St. Louis, Missouri, October 2005;
- Sampled within CBI, Inc. (CBI Building) and Willco Plastics buildings (WILLCO Building) and former TCE AST. Also conducted ACM sampling of the ambient air within the CBI/WILLCO to determine worker PPE. Submitted report to the USEPA as: Interim Data Submission Report for the Former Carter Carburetor Site, Round 1 Field Data, St. Louis, Missouri, November 2006;
- Cleaned, mapped and video inspected sewer lines within/beneath Carter Site;
- Conducted characterization sampling of the UST clusters closed in place in 1983-1984 by ACF personnel;
- Collected additional soil samples in the TCE AST area, from the perimeter of the former North and South Die Cast buildings, and from nine (9) UST tank clusters for further delineation. Submitted report to the USEPA as: Interim Data Submission Report for the Former Carter Carburetor Site, Round 2 Field Data. St. Louis, Missouri. December, 2007 and UST Areas Characterization Results: CBI Building/LRA Property, Former Carter Carburetor Site”. St. Louis, Missouri. March, 2008;
- Collected concrete wipe/bulk samples in connection with a PCB remediation pilot study.
- Collected sub-slab vapor samples beneath a relict floor slab adjacent to the TCE AST and below the floor slab of the CBI/WILLCO Buildings and within the HHBGC. The on-Site sampling was conducted on a randomized grid pattern and was analyzed by the USEPA using USEPA on-Site mobile laboratory; and
- Prepared and submitted to USEPA for review and comment: Engineering Evaluation and Cost Analysis for the Former Carter Carburetor Site, 2840 N. Spring Avenue, St. Louis, Missouri, September 22, 2010.