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Governor's Office of Emergency Services
Hazardous Material Spill Update
CONTROL#: 24-3316 NRC#
NOTIFY DATE/TIME: 06/10/2024 / 0950RECEIVED BY:
OCCURENCE DATE/TIME:
06/08/2024/1830
CITY/OP. AREA:
Yosemite/Mariposa County

MARIPOSA COUNTY APCD
1.a. PERSON NOTIFYING Cal OES:
AGENCY: Yosemite West Utility District
1.b. PERSON REPORTING SPILL (If different from above):
AGENCY:
SUBSTANCE TYPE:
a. SUBSTANCE:b. QTY:
Amount
Measurec. TYPE:d. OTHER:e. PIPELINEf. VESSEL
>= 300 Tons
1.Sewage30,000 Gal(s)SEWAGENoNo
2. NoNo
3. NoNo
Orignal Description:Debris obstructed the cleanout of a single-family home, causing a sewage overflow near the listed location. The spill extended onto an adjacent undeveloped property and into a dry culvert. Multiple crews from the Yosemite West Utility District addressed the situation at the residence. They cleared the cleanout and the connected sewer main, restoring normal flow. Technicians are disinfecting the site, with cleanup efforts to follow. No damage to private property has been reported.
Update(s): 06/11/2024 09:05:52 AM - Mariposa County Public Works personnel discovered that the spill did reach the water of West Creek. The amount of sewage that impacted the creek is unknown. The reporting party will update the California State Warning Center with more information.
; 06/12/2024 03:36:18 PM - Per the reporting party 25,904 gallons of sewage was released. Yosemite West Utility District is taking Chloroform samples in the area.

PERSON NOTIFYING Cal OES OF SPILL UPDATE:
NAME:
AGENCY:
PHONE#:
Ext:
PAG/CELL:
Yosemite West Utility District
UPDATE QUANTITY
Amount
    Measure
1.
    Gal(s)
2.
3.
4.

UPDATE KNOWN IMPACT:




UPDATE CAUSE:

SITUATION UPDATE:
Per the reporting party 25,904 gallons of sewage was released. Yosemite West Utility District is taking Chloroform samples in the area.
Link to Spill Report: http://w3.calema.ca.gov/Operational/MALHaz.NSF/SpillAllDocs/C8E7C390C5DBF12188258B38005C7953?OpenDocument
FAX NOTIFICATION LIST:
AA/CUPA, DTSC, RWQCB, US EPA, USFWS, Co/WP, Co/Hlth, Co/E-Hlth
ADMINISTERING AGENCY:Mariposa County Health Department
SECONDARY AGENCY:
ADDITIONAL COUNTIES:
ADDITIONAL ADMIN. AGENCY:
OTHER NOTIFIED:None
RWQCB Unit:5C
Cal GEM:
Cal OES Region:

CONFIRMATION REQUEST:




FAX NOTIFICATION LIST:


ADMINISTERING AGENCY:


ADDITIONAL ADMIN. AGENCY:


SECONDARY AGENCY:


ADDITIONAL COUNTIES:


Cal GEM:


RWQCB Unit:


Cal OES Reg.


Created by: Warning Center on: 06/12/2024 03:36:18 PM Last Modified by: Warning Center on: 06/12/2024 03:42:00 PM
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