At 2:17 pm, Contra Costa County Hazmat was responding to a 3,000 gallon chemical spill at Westbound Highway 4 at Somersville offramp in the City of Antioch.
Contra Costa County Fire was dispatched to the incident along with Hazmat. The off-ramp was being blocked by fire crews. The preliminary information was the chemical is a natural biodegradable sanitation chemical—possibly running into a creek from the offramp.
The westbound Highway 4 to Somersville was shutdown and CHP was requested to assist with blocking.
UPDATE
As of 2:30 pm, Engine 81 reported the offramp was blocked and sanitation vehicles were still on scene. County Hazmat was still not yet on scene.
4:07 pm UPDATE
Hazardous spill scene in Antioch has been stabilized & accidental leak stopped. Approx 1K gallons bio hazard blackwater spilled into adjacent detention basin & did not reach river. County hazmat overseeing cleanup. CHP working to reopen exit ramp in next 2 hours
5:05 pm UPDATE – all lanes open per CHP
County Hazmat Statement:
Our HazMat team has responded to an accidental spill of 3,000 gallons of blue biodegradable toilet mixture and human waste from portable toilets in Antioch near the Somersville Road exit of Hwy 4. The spill poses no inhalation-health threat to people who smell the odor. The spilled liquid and waste have been contained in an area that collects storm water. A plan is being developed to pump the spilled material and dispose of it properly in the sewer system.
| Detail Information | |||||||
| 5:15 PM | 12 | [17] ^***CANCEL SIGALERT*** ALL LANES OPEN | |||||
| 5:14 PM | 11 | [16] 1039 DOTCC | |||||
| 5:14 PM | 10 | [15] B19-404N RAMP BACK OPEN // CREW FINISHING UP CLEAN UP ON CITY STREETS | |||||
| 4:16 PM | 9 | [14] 19-S5 CONTACTED COCO FIRE HAZMAT TEAM – CONFIRMED NEG HAZMAT / CO HEALTH ALSO ON BOARD W/ THAT — CLEAN UP CONTAINED AT GS – OFR STILL SHUT DOWN / MAIN LINE NOT EFFECTED | |||||
| 3:39 PM | 8 | [13] ^***ISSUE SIGALERT*** THE SOMERSVILLE OFFRAMP FROM WB SR4 IS CLOSED DUE TO SPILLED LOAD. UNK ETO REF LOG 1165 | |||||
| 3:36 PM | 7 | [11] B19-404N REQ SIG ALERT | |||||
| 3:35 PM | 6 | [10] B19-403B CALTRANS 97 SETTING CLOSURE IN EXIT LN / MAINLINE OPEN | |||||
| 3:22 PM | 5 | [8] 1039 DOT CC | |||||
| 3:18 PM | 4 | [6] B19-404N FIRE IS ADV APPROX 3K GALLONS OF BLACKWATER FRM PORTA POTTY HOLDING TRUCK – NEG HAZMAT – HOWEVER IT HAS LEAKED INTO DRAINAGE BASIN – POSS BIOHAZARD — REQ DOT IN CASE OF HARD CLOSURE | |||||
| 3:11 PM | 3 | [5] B19-404N 2 RIGHT LANES PRIOR TO RAMP AND ENTIRE RAMP SHUT DOWN // MULTIPLE FIRE UNITS 97 | |||||
| 3:09 PM | 2 | [4] B19-404N FIRE 97 / COUPLE LANES SHUT DOWN / WILL ADV | |||||
| 2:50 PM | 1 | [1] PORTABLE TOILET CHEMICALS IN OFR LNS | |||||
