Per California Law (Government Code 4216) and Cal/OSHA regulations, all excavators, including public agencies, are required to contact their ONE CALL Center prior to breaking ground. Both excavators and utility members have responsibilities as dictated by the law.
- Delineate or pre-mark their work area in white (paint, chalk, flour, flags, etc.).
- Contact us and give at least two (2) working days NOT including the date of notification (4216.2(b)) prior to excavating.
- Hand dig to expose utility lines to the point of no conflict within the tolerance zone.
Utility members must:
- Mark or locate their lines within two (2) working days NOT including the date of notification (4216.2(b)) prior to the start of excavation.
- Use the APWA Color codes to mark their facilities.
- Be accurate within 24 inches either side of the buried facility (tolerance zone).
Employees assigned utility locating responsibilities or are involved in excavation operations must be trained in the One Call Law and utility marking guidelines.
California Government Code 4216
USA North 811 | Call 811 Before You Dig – Serves the following counties :Alameda, Alpine, Amador, Butte, Calaveras, Colusa, Contra Costa, Del Norte, El Dorado, Fresno, Glenn, Humboldt, Kern, Kings, Lake, Lassen, Madera, Marin, Mariposa, Mendocino, Merced, Modoc, Mono, Monterey, Napa, Nevada, Placer, Plumas, Sacramento, San Benito, San Francisco, San Joaquin, San Luis Obispo, San Mateo, Santa Clara, Santa Cruz, Shasta, Sierra, Siskiyou, Solano, Sonoma, Stanislaus, Sutter, Tehama, Trinity, Tulare, Tuolumne, Yolo, Yuba.
USA North Delineation Guidelines
DIGALERT | Call 811 Before You Dig – Serves Imperial, Inyo, Los Angeles, Orange, Riverside, San Bernardino, San Diego, Santa Barbara, and Ventura counties.
DIGALERT Delineation Guidelines
The California Regional Common Ground Alliance (CARCGA) – is a 501(c)(6) non-profit mutual benefit corporation dedicated to ensuring public safety, environmental protection, and integrity of underground services in California through the effective promotion of CGAs damage prevention best practices.
CARCGA Damage Information Reporting Tool | Field Form – California Government Code section 4216.6 g & h calls for operators and excavators to provide information about “incident events” using the California Regional Common Ground Alliance Virtual Private Damage Information Reporting Tool. Incident events are excavator downtime, utility damages, near misses, and One Call Law violations.
CGA Best Practices
JPIA Trench Excavation Competent Person Pocket Guide
Cal/OSHA Trench Toolbox Topic
CARCGA Facility Facility Event Form (DIRT)
JPIA Trench Inspection and Entry Authorization
JPIA Trench Competent Person Assignment Form
JPIA Qualified Underground Line Locator Form
JPIA Trenching by the Numbers Toolbox Topics
JPIA Daily Worksite Checklist for Trench-Excavation Sites