Revised Interim Measures Implementation Plan, Polynt Composites USA
3 Documents in Project
Summary
SCH Number
2018101005
Lead Agency
Department of Toxic Substances Control
Document Title
Revised Interim Measures Implementation Plan, Polynt Composites USA
Document Type
NOD - Notice of Determination
Received
Posted
10/22/2020
Document Description
The Department of Toxic Substances Control (DTSC) has approved the Revised Interim Measures Implementation Plan (Revised IMIP) for soil and groundwater contamination at the Polynt Composites USA, Inc. (Polynt) facility located at 2801 Lynwood Road, Lynwood, Los Angeles County, California. The Revised IMIP will expand the existing soil vapor extraction (SVE) system with the addition of air sparging (AS) to improve the rate of soil and groundwater contaminant removal. The proposed approach will introduce fresh air into the groundwater resulting in physical removal and biological degradation (destruction) of contaminants. Additional soil vapor extraction wells will remove contaminated soil vapor from the soil. A new thermal oxidizer unit will be installed to treat extracted vapor to the current air quality standards prior to discharge to atmosphere. The existing groundwater extraction and treatment (GET) system will be enhanced to include a combination of injection and extraction wells to increase groundwater flow and contaminant removal. Impacted groundwater will be extracted from beneath the site and then treated for removal of dissolved organic compounds including 1,4-dioxane. The extracted groundwater will be treated in a new above-ground system using activated carbon, hydrogen peroxide, and ultra-violet light. The treated groundwater will then be injected back into the subsurface through injection wells.
The injected treated groundwater will enhance cleanup times by driving impacted groundwater more quickly to the extraction wells. After approval of the Revised IMIP, the project design and installation were changed to accommodate redevelopment of the property. These changes were: installation of well heads and piping underground; increased capacity of the groundwater treatment system; and relocation of the treatment system and electrical hookups. The “100% Design Report – Remediation Systems,” October 2, 2020, incorporates the project changes.
Contact Information
Name
Paul Ruffin
Agency Name
Department of Toxic Substances Control
Contact Types
Lead/Public Agency
Phone
Name
Agency Name
Polynt Composites USA, Inc.
Contact Types
Project Applicant
Location
Cities
Lynwood
Counties
Los Angeles
Other Location Info
2801 Lynwood Road, Lynwood, CA 90262
Notice of Determination
Approving Agency
DTSC
Approving Agency Role
Lead Agency
Approved On
Determinations
(1) The project will have a significant impact on the environment
No
(2a) An Environmental Impact Report was prepared for this project pursuant to the provisions of CEQA
No
(2b) A Mitigated or a Negative Declaration was prepared for this project pursuant to the provisions of CEQA
Yes
(2c) An other document type was prepared for this project pursuant to the provisions of CEQA
No
(3) Mitigated measures were made a condition of the approval of the project
No
(4) A mitigation reporting or monitoring plan was adopted for this project
N/A
(5) A Statement of Overriding Considerations was adopted for this project
No
(6) Findings were made pursuant to the provisions of CEQA
Yes