**Remedial Construction Through Fall 2013**
Baker Beach Disturbed Areas 1A and 2 are two former U.S. Army disposal sites located on the bluff tops above the Pacific Ocean and Marshall’s Beach.
BBDA 1A contains old asphalt roofing material from the adjacent Cranston and Marcus Miller batteries. The material consists of asphalt pieces, brick fragments, and tar-permeated sand. The material either eroded from the batteries or was removed from the batteries and disposed of in the area. BBDA 1A contains polycyclic aromatic hydrocarbons, metals, and a pesticide at levels that pose a potential risk to ecological species, such as plants and wildlife, and could pose a risk to humans if left to erode into the soil.
At BBDA 2, the Army disposed of debris and fill material. The debris fill is a mixture of soil, construction debris, landscaping debris, and other miscellaneous debris (e.g., cans, bottles, and glass). Approximately 6,700 cubic yards of debris fill and soil are contaminated with metals at levels that pose a potential risk to the environment.
In March 2013, the California Department of Toxic Substances Control (DTSC) approved Final Remedial Action Work Plans (RAPs) for the sites. Under the approved remedies, the Presidio Trust will removal fill material and contaminated soil to reduce the risks to levels that are protective of human health and the environment.
The Presidio Trust expects to perform remedial construction from summer through fall 2013. At BBDA 1A, an estimated 4,400 cubic yards of asphalt material and soil will be removed. At BBDA 2, approximately 6,700 cubic yards of debris and soil will be removed. The Presidio Trust will transport the excavated material via trucks to offsite, permitted landfills. The sites will then be backfilled with clean soil.
In general, work hours will be from 8 a.m. to 6 p.m., Monday through Saturday. Construction traffic will be limited to Merchant Road and Lincoln Boulevard to access Highway 101. For public safety, the Coastal Trail and coastal bluffs, from the Golden Gate Bridge toll plaza south to the intersection with the Batteries to Bluffs Trail, will be fenced off and closed to the public during construction. The Merchant Road and Langdon Court parking lots will be closed. The northern portion of Marshall’s beach will also be closed.
Following remediation, the sites will be stabilized by planting native plants grown in the Presidio Nursery. The historic earthworks west of the batteries will be restored and the alignment of the future Coastal Trail through the area established.
For questions during the course of the project, contact: