The South Prescott Community Technical Assistant (TA) will be in training on November 18. Office hours will be rescheduled to Thursday or Friday. When office hours for the week of November 17 have been determined, they will be posted here.

Posted in AMCO Superfund Site Remediation, Community, Technical | Leave a comment

On Monday September 29, 2014 the Technical Assistance for Communities Technical Advisor (TASC TA) participated in a meeting with EPA representatives, EPA’s contractor representatives, and representatives from the California Department of Toxic Substances Control (DTSC). The purpose of the meeting was to update DTSC on the Non-time Critical Removal Action being implemented at the AMCO Chemical Superfund Site and to obtain DTSC’s input for the EE/CA that EPA is preparing as part of the Non-time Critical Removal Action.

EPA discussed the following points regarding the Non-time Critical Removal Action process compared with the formal Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA) process:

  • There is no DTSC cost share.
  • There is no Record of Decision (ROD).
  • Instead of a ROD, an EE/CA is done. The EE/CA can be thought of as a mini Feasibility Study (FS).
  • Only three criteria (implementability, cost, and effectiveness) are used for the EE/CA. Applicable or Relevant and Appropriate Requirements (ARARs) and risk are also taken into account.
  • The EE/CA project cost limit is $6,000,000 and funds come from a Remedial Action fund in the EPA.
  • An EPA Priority Panel decides whether the project will be funded.

EPA discussed the following schedule items:

  • The source area wells will be sampled on October 20. EPA hydrogeologist Terry Johnson will be present for the sampling of these wells.
  • The Draft EE/CA will be issued for review in November.
  • The public review period will end in early January.
  • The Priority Panel will meet in March.
  • Pending approval of funding by the Priority Panel, the remediation contractor will mobilize in the summer of 2015.

DTSC suggested that enhanced bioremediation using horizontal wells be considered in the EE/CA.

On October 1, 2014 the TA participated in a conference call meeting with EPA representatives and EPA’s contractor representatives. The EE/CA must examine the No Action alternative and at least two other alternatives. Based partly on DTSC input, the EE/CA will consider the following alternatives:

  • Free Product Removal followed by In-Situ Chemical Reduction using zero-valent iron (ZVI) and/or Enhanced In-Situ Bioremediation
  • Dual-Phase Extraction
  • In-Situ Thermal Treatment (Electrical Resistance Heating or Thermal Conductive Heating)
  • Excavation with Off-Site Disposal
  • No Action

A number of factors affecting the selection of the preferred remedy were discussed. These included community concerns such as:

  • Emissions from the remedy, including diesel emissions from trucks
  • Desire not to dispose of wastes in a way that could cause problems for some other community
  • Desire for sustainability of the remedy
  • Traffic in the neighborhood
  • Noise
  • Vibrations
Posted in AMCO Superfund Site Remediation, Community, Technical, USEPA | Leave a comment

A new technical document has been posted in the Technical Assistant’s (TA’s) Documents section of the Document Archive of this website. The new document is titled “Response to AMCO Community Action Group Question Regarding Vapor Intrusion” and answers the question asked by CAG members during the March meeting, “Is the potential for vapor intrusion into the homes nearest to the AMCO Chemical Superfund Site increasing, decreasing, or staying about the same?” Please have a look at the report in the Document Archive to see how the TA used a tool called “hydrographs” to conclude that the potential for vapor intrusion into the homes is decreasing.

Posted in AMCO Superfund Site Remediation, Community, Technical | Leave a comment

EPA has hired OTIE (Oneida Total Integrated Enterprises) as the contractor for the cleanup (remediation) phase of work at the AMCO site. The local community’s Technical Assistant (TA) participated in a site walk on September 9th with representatives from EPA, OTIE, and Gilbane (formerly ITSI), which has been EPA’s contractor for the past several years. OTIE is respected by the TA and others in the environmental consulting community as an excellent environmental engineering contractor. OTIE is owned by the Oneida Tribe of American Indians.

Posted in AMCO Superfund Site Remediation, USEPA | Leave a comment

The Technical Assistant (TA – John Schweizer) will resume office hours at the regularly scheduled time (Tuesdays from 1 PM to 5 PM) on August 26. Drop by the West Oakland Environmental Indicators Project office at 349 Mandela Parkway during office hours to chat and ask your questions about the AMCO Chemical Superfund Site.

Posted in AMCO Superfund Site Remediation, Community, Technical | Leave a comment

The Technical Assistant for the West Oakland community will not be holding office hours on August 19 because of a schedule conflict.

Posted in AMCO Superfund Site Remediation, Community, Technical | Leave a comment

The Community Technical Assistant (TA) has resumed regular weekly office hours from 1:00 PM to 5:00 PM on Tuesday afternoon. Office hours are held at the West Oakland Environmental Indicators Project office located at 349 Mandela Parkway. Come by to have your questions answered about the AMCO Chemical Superfund Site, which is located on 3rd Street between Mandela Parkway and Center Street. Or come by just to chat.

Posted in AMCO Superfund Site Remediation, Community, Technical | Leave a comment

This week (March 17 – 21) only, the Technical Advisor’s Office Hours will be from 10AM to 2PM on Thursday, March 20. Regular Tuesday Office Hours from 1PM to 5PM will resume on March 25.

Posted in AMCO Superfund Site Remediation, Technical | Leave a comment

The Technical Advisor’s (TA’s) latest Field Observation Report (#8) has been posted to the TA’s Field Reports page on this website.

Posted in AMCO Superfund Site Remediation, Community | Leave a comment

The Technical Advisor’s (TA’s) comments on EPA’s Draft Remedial Investigation Addendum document has been added to the TA’s Documents section of the Document Archive on this website. The TA will discuss these comments at the March 3 CAG Meeting.

Posted in AMCO Superfund Site Remediation, Community, Technical, USEPA | Leave a comment