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S�aeA �C Technical Consultai Data Analysis and 7*A G LltigaGon Support for the Ennironci 2656 29" Street, Suite 201 Santa Monica, CA 90405 Matt Hagemann, P.G, CA& (949) 987-9013 mhmmannaswaoe.com May 11, 2020 Rebecca Davis Lozeau I Drury LLP 1939 Harrison Street, Suite 150 Oakland, CA 94618 Subject Comments on the Final Impact Report for the Bowery Mixed Use Project Dear Ms. Davis: I have reviewed the May 2020 Final Impact Report for the Bowery Mixed Use Project ("ProjecC'j in Santa Ana, California for impacts related to Hazards and Hazardous Waste. Prior to Project approval, the applicant needs to engage California Department of Toxic Substances Control (DTSC? in a voluntary cleanup agreement to ensure adequate contaminated soil cleanup at the Project site. The Project site contains approximately 900 cubic yards of TPH contaminated soils above residential screening levels that will require excavation and disposal (FEIR, p. 2-7). Past land uses at the Project site, according a Phase 1 and two Phase It environmental site assessments, include Ricoh thermal paper processing and toner manufacturing operations. Mitigation Measure HAZ-1 requires a soil management plan to be used during construction to guide the removal and disposal of the areas of TPH-impacted soil. On its own, a soil management plan is insufficient Toensure the adequacyand the health -protectiveness of the cleanup, engagementof the DTSC is necessary. DTSC engagement should be formalized through a voluntary cleanup agreement and the cleanup of the Projectsite should follow an assessment and cleanup program directed by DTSC. DTSC itself, in commenting on the Project DEIR, said: "Please note that all environmental investigations, sampling and/or remediation for the project Site should he conducted under a workplan approved and overseen by a regulatory agency that has jurisdiction to oversee hazardous substance cleanup. Clarify in this section that a Removal Action Workplan (RAW) or Remedial Action Plan (RAP) would be prepared and specify the oversight agency to review and approve the RAW or RAP" "Please note that land use covenant may be required for the Project Site if both soil and groundwater cannot be remediated to meet cleanup goals for residential use." (Final EIR, p. 2- 3). 32 75C-87