Final Removal Action Workplan for 3512 & 3518 Clayton Road (aka Clayton Road Townhomes Project)

The Ashbury Apartments Interim Removal Action Workplan involves the remediation of soil contamination at 1650 Ashbury Drive in Concord, California, spanning approximately 1.81 acres at the northwest corner of Ashbury Drive and Amador Avenue. The site is affected by lead and organochlorinated pesticides in soil concentrations exceeding residential screening levels and state hazardous waste thresholds. Remediation will entail the excavation of about 1,000 cubic yards—equivalent to roughly 1,500 tons—of contaminated soil from four distinct areas, with excavation depths ranging from two to four feet below ground surface. Soil removal will continue until confirmation sampling verifies compliance with established cleanup criteria, after which the excavated areas will be backfilled with clean, imported fill material verified to meet the Department of Toxic Substances Control’s guidelines. The project is scheduled to commence in Fall 2025 and is expected to be completed within six weeks, with all activities subject to local noise and dust control regulations. Operations are tracked via the EnviroStor environmental database, and imported fill must be accompanied by documentation certifying compliance with DTSC standards. The project is governed under the California Environmental Quality Act, with the City of Concord as the lead agency and the Department of Toxic Substances Control functioning as the responsible regulatory body, having approved the workplan on October 29, 2025. While no formal federal contract clauses, pricing, or procurement mechanisms are included, oversight is provided by designated representatives including Karri Peters of DTSC and Brad Dickason of Maracor Development, Inc., the project sponsor. Transportation of contaminated soil is anticipated to require approximately 84 truckloads for offsite disposal, though no specific packaging, labeling, or MIL-STD standards are prescribed; handling protocols are tied to state and local environmental codes rather than federal acquisition regulations. Inspection and acceptance of remediation outcomes occur at the site, contingent upon soil sampling results and adherence to DTSC’s clean fill criteria. The workplan aligns with prior environmental reviews, including the 2024 Modified Initial Study and related CEQA determinations, ensuring that remediation activities do not trigger significant environmental impacts. No financial figures, contract award criteria, or federal acquisition elements are documented, as the materials constitute an environmental remediation plan rather than a procurement solicitation or binding contract.