Site Mitigation & Restoration Program

We protect and maintain California’s land and places
by setting strict standards for land restoration and cleanup

Resources & Contacts


The following are resources available:

Information Repositories

James S. Thalman
Chino Hills Branch Library

14020 City Center Drive
Chino Hills, CA 91709
M-Th: 10am-8pm
Fri: 10am-6pm
Sat: 9am-5pm
Sun: 1pm-5pm

Department of Toxic Substances Control
5796 Corporate Avenue
Cypress, CA 90630
714-484-5336 – Contact Jone Barrio for an appointment

Site documents are also available for electronic review on DTSC’s EnviroStor website.

Public documents from DTSC can be made available in alternate formats (Braille, large print, etc.) or in another language in accordance with state and federal law. Please contact Ms. Stacey Lear at DTSC (714-484-5354) for assistance.

Notice to Hearing Impaired Individuals TDD users can also obtain information about the Aerojet Site by using the California State Relay Service at 888-877-5378. Ask them to contact Ms. Stacey Lear, DTSC Public Participation Specialist, regarding Aerojet, Chino Hills.