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TRANSPORTATION, WATER & INFRASTRUCTURE COMMITTEE

Meeting Date:	12/14/2020
Subject: PROVIDE letter of support for Hazardous Materials Commodities Flow Study-Risks to Transportation, and request action from BOS.
Submitted For:	TRANSPORTATION, WATER & INFRASTRUCTURE COMMITTEE
Department:	Conservation & Development
Referral No.:	5, 15
Referral Name:	Review projects, plans and legislative matters that may affect the health of the San Francisco Bay and Delta...
Presenter:	Ellen Dempsey, CCHMP & Matt Kaufmann, PWD	Contact:	Ellen Dempsey, (925)335-3200

Information

Referral History:

The Board of Supervisors approved a grant application to the State Office of Emergency Services (OES) in 2017.

Referral Update:

A Commodity Flow Study was prepared from historical and currently available railroad and highway data. Based on the results of the Flow Study, 3 chemicals of concern (COCs) were identified to be used in the Community Risk Assessment portion of this report. Based on the COCs and other criteria, including rising tide data from the Adapting to Rising Tides (ART) program, California Healthy Places Index, liquefaction susceptibility, CalARP facilities, locations of critical facilities, weather conditions, railroad locations, and critical arterial road locations, 5 pinch points* were located in the coastal areas of Contra Costa County.

The pinch points were used to prepare the Community Risk Assessment and chemical plume analysis to determine worst-case scenario effects of a release of the ammonia/anhydrous ammonia, propane, and sulfuric acid, which were designated as the most critical COCs.

Staff will provide additional detail on the report at the Committee meeting as well as answer any questions.

* Pinch points are locations most susceptible to a hazardous materials incident as well as vulnerable populations and critical facilities affected by an incident

Recommendation(s)/Next Step(s):

RECEIVE report, RECOMMEND that the Board of Supervisors accept the findings of the study which address community risk to flooding and sea level rise.

Fiscal Impact (if any):

No Fiscal Impact.

Attachments
HazMat Transportation Risk Assessment