Site History

Envirostor (State of California) page

The Brentwood Gun Club began operation at the site in 1964. The facility had a trap and skeet field, rifle and pistol ranges, and an air gun range. Prior to that the property was used as a sanitary landfill. Contra Costa County acquired the property in August 1999 in preparation for the construction of the State Route 4 Bypass through the site. A Removal Action Workplan was implemented for consolidation of lead-contaminated soil under the proposed roadway and capping contaminated outside of the freeway footprint with 1-2 feet of clean fill. Some soils that exceeded residential screening levels but were below commercial screening levels for lead were left in place without a cap. A Land Use Covenant was filed with the County Recorder that restricts future usage of the site for residential, child care, or school facilities. Annual inspections are required as part of Operations and Maintenance.

Editors note; this deed restriction is current and yet it is a housing development even though it is prohibited in the land use covenant.

Envirostor Map

Deed Restriction / Land Use Covenant:

Land Use Covenant    9/2/2008

SITE MANAGEMENT REQUIREMENTS:

• ACTIVITIES PROHIBITED WHICH DISTURB THE REMEDY AND MONITORING SYSTEMS WITHOUT APPROVAL
• DAY CARE CENTER PROHIBITED
• HOSPITAL USE PROHIBITED
• LAND USE COVENANT
• NO EXCAVATION OF CONTAMINATED SOILS WITHOUT AGENCY REVIEW AND APPROVAL
• NO GROUNDWATER EXTRACTION AT ANY DEPTH WITHOUT APPROVAL
• NO OIL OR GAS EXTRACTION AT ANY DEPTH
• NOTIFY PRIOR TO CHANGE IN LAND USE
• NOTIFY PRIOR TO DEVELOPMENT
• NOTIFY PRIOR TO SUBSURFACE WORK
• PERFORM H&S PLAN PRIOR TO SUBSURFACE WORK
• PUBLIC OR PRIVATE SCHOOL FOR PERSONS UNDER 21 PROHIBITED
• RAISING OF FOOD PROHIBITED
• REQUIRES SURFACE COVERS
• RESIDENCE USE PROHIBITED

POTENTIAL CONTAMINANTS OF CONCERN

LEAD
POLYNUCLEAR AROMATIC HYDROCARBONS (PAHS)

lead, arsenic, cadmium, polycyclic aromatic hydrocarbons (PAHs) page 3 of the Land Use Covenant

Editors Note: DEED RESTRICTION