Governor's Office Emergency Services
Hazardous Materials Spill Report

    DATE: 12/18/2024
    TIME: 1005
    RECEIVED BY:
    CONTROL#:
    Cal OES - 24-7047
    NRC -
1.a. PERSON NOTIFYING Cal OES:
1. NAME:2. AGENCY:3. PHONE#:4. Ext:5. PAG/CELL:
West Valley Sanitation District
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. Sewage=7,000 Gal(s)SEWAGENoNo
2. = NoNo
3. = NoNo
g. DESCRIPTION: Per the reporting party: An overflow of sewage occurred from a manhole cover due to a blockage of the main line which was caused by a build-up of grease. This release began at 1800 hours on 12/17/2024 and was controlled at 0900 hours on 12/18/2024. The sewage released onto the concrete and asphalt and also into the nearby Short Creek. All the material has been deemed recoverable and will be returned to the system. At the time of report, approximately 4,000 gallons has been recovered. There are no hard road closures, however there is traffic control to navigate around the sewage.
h. STOPPAGE/CONTAINMENT:i. WATER INVOLVED: j. WATERWAY:k. DRINKING WATER IMPACTED
Stopped, ContainedYesShort CreekNo
l. MARITIME VESSEL
No
m. KNOWN IMPACT
None
3. a. INCIDENT LOCATION: Intersection Shannon Road and Happy Acres
b. CITY:c. COUNTY: d. ZIP:
Los Altos
Santa Clara CountyBAY AREA AQMD
4. INCIDENT DESCRIPTION:
a. DATE:b. TIME (Military):c. SITE:d. REPORTED CAUSE
12/17/20241800 Road Blockage
e. INJURIESf. FATALITY g. EVACUATIONh. CLEANUP BY:
NoNoNoReporting Party
6. NOTIFICATION INFORMATION:
a. ON SCENE:b. OTHER ON SCENE: c. OTHER NOTIFIED:
d. ADMIN. AGENCY: Santa Clara County Department of Environmental Healthe. 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: 24-7047 *********

Created by: Warning Center on: 12/18/2024 10:05:03 AM Last Modified by: Warning Center on: 12/18/2024 10:20:42 AM