Schlage Lock’s Remediation
The City of San Francisco approved the Schlage Lock development, a residential development of 1,679 housing units, which has parallel environmental issues as the former railyard portion of the Baylands site – where housing is being proposed. Similar to the Baylands, the Schlage Lock project required approval from various regulatory agencies of the proposed Remedial Action Plan, which outlines the approved methods for site cleanup. The successful cleanup included:
. Treating ~15,000 cubic yards of soil contaminated with VOCs by aeration
. Capping of ~ 22,000 cubic yards of soil contaminated with metals
. ~6,000 cubic yards of contaminated soil with VOCs disposed offsite to a permitted facility
. Groundwater treatment through an Enhanced Reductive Dechlorination (ERD) process using sodium lactate. Sodium lactate is a food grade substance injected into the groundwater to help the micro-organisms present in the soil and groundwater break down the VOCs into non-toxic compounds.
Land Use Controls (deed restrictions) are recorded where impacted soil remains. Where housing is proposed on the Baylands (areas in orange and yellow in the land use map) is likely to receive the same or similar methods of cleanup. Below is an except from the Brisbane Baylands EIR of potential methods for the former railyard site on the Baylands.