Governor's Office Emergency Services
Hazardous Materials Spill Report

    DATE: 09/19/2023
    TIME: 1511
    RECEIVED BY:
    CONTROL#:
    Cal OES - 23-6014
    NRC -
1.a. PERSON NOTIFYING Cal OES:
1. NAME:2. AGENCY:3. PHONE#:4. Ext:5. PAG/CELL:
E Bay MUD
1.b. PERSON REPORTING SPILL (If different from above):
1. NAME:2. AGENCY:3. PHONE#:4. Ext:5. PAG/CELL:
2. SUBSTANCE TYPE:
2. a. SUBSTANCE:b.QTY:>=<Amount Measurec. TYPE:d. OTHER:e. PIPELINEf. VESSEL
>= 300 Tons
1. Cementitious Material - Viscous Type, Post Grout=200-300 Gal(s)CHEMICALNoNo
2. = NoNo
3. = NoNo
g. DESCRIPTION: During construction of a chlorine holding basin an injection of material resulted in the release, material struck the bedrock then travelled horizontally through soil going directly into a waterway, operations have ceased and biologists are on sene monitoring creek impacts during mitigation, RP and contractor are handling the containment and clean up.
h. STOPPAGE/CONTAINMENT:i. WATER INVOLVED: j. WATERWAY:k. DRINKING WATER IMPACTED
Stopped, ContainedYesSan Pablo CreekYes
l. MARITIME VESSEL
m. KNOWN IMPACT
Other		Reason for Other: Area Isolated
3. a. INCIDENT LOCATION: 190 Camino Pablo Rd, Orinda Water Treatment Plant
b. CITY:c. COUNTY: d. ZIP:
Orinda
Contra Costa County94563BAY AREA AQMD
4. INCIDENT DESCRIPTION:
a. DATE:b. TIME (Military):c. SITE:d. REPORTED CAUSE
09/19/20230845 Treatment/Sewage Facility Human Error
e. INJURIESf. FATALITY g. EVACUATIONh. CLEANUP BY:
NoNoNoContractor
6. NOTIFICATION INFORMATION:
a. ON SCENE:b. OTHER ON SCENE: c. OTHER NOTIFIED:
RWQCB, DFW
d. ADMIN. AGENCY: Contra Costa County Health Services Departmente. SEC. AGENCY:
f. ADDITIONAL COUNTY: g. ADMIN. AGENCY:
h. NOTIFICATION LIST:
Cal GEM:
RWQCB Unit:

2
Cal OES Region:
AA/CUPA, DTSC, RWQCB, US EPA, USFWS, CDPH-D.O., DWP-DO, LANDS, PARKS & REC, Co/WP, Co/Hlth, Co/E-Hlth
Photo Attachment:
11. Cal OES Reg.
********* Control No: 23-6014 *********

Created by: Warning Center on: 09/19/2023 03:11:59 PM Last Modified by: Warning Center on: 09/19/2023 03:28:47 PM