exxonmobil presentation 2016.01

8/18/2019 ExxonMobil Presentation 2016.01

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CSB Public Meeting

ExxonMobil Refinery Explosion

Torrance, California

anuary ,


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Agenda

•

• Statements from Elected Officials• Investi ation Team Presentation

• Board Questions to Team

• Torrance Refinery Action Alliance• Break

• PSM Panel

• Board Questions to Panel• Public Comment

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• os ng ommen s


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Board Opening Remarks

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a emen s rom ec e c a s

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Investigation Team Presentation

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Investigation Presentation

• ac groun an rocess escr p on• Incident Description

• Modified Hydrofluoric Acid Near Miss

and Off-site Conse uences• Key Issues

• • Obstacles

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Background and Process Design

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Refinery was constructed

n -

The Torrance Refiner

represents about 1/5th of

southern California’s fluid

capacity

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Refinery Proximityto Public Receptors

Within a 3-mile radius

of the refinery, there

• 330,000 residents

• 71 schools

• 8 hospitals

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The FCC converts low-value, thick oil to higher value

gasoline by “ cracking” the large molecules apart into

smaller molecules

Catal tic Crackin

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FCC Layout

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Catal st

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uOperation

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ESP Principle of Operation

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Incident Overview

• February 11 – FCC expander began toex erience vibrations

• February 16- Expander vibrations

exceeded limit and unit wasautomatically put in “ safe park” by logic

controls

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Incident Overview

with expander issue

• u t mate y ec e to use same p an

from 2012 to go into expander and cleant, stay ng n sa e par

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nc en me ne• Early on February 18, maintenance

workers who were to blind theex ander outlet became concerneddue to steam coming out of expander

• Steam reduced, allowinhydrocarbons to flow from maincolumn to flue as i in

• Workers started getting hydrogensulfide alarms and exited the unit

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Serious Near Miss

“ Dropping loads or other falling objectsw n amage range o equ pmen

containing flammable or toxic material”

-near miss incident

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• Two tank

• Approximately80 feet south

of the ESP

• Still outside ofxxon o s

minimum

spacing

re uirement

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Location

Settler Tank

Damaged

Scaffold

IntakeIntake

Column

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MHF•

severe hazard to the population and

• Causes severe damage to skin,,

exposure and can lead to death

• arge re ease cou mpac un re s othousands of residents

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ommun y xposure

released due to the ESP explosion• ata yst ust e n t e near y

communities as far as a mile away• SCAQMD report can be found on theirwebsite: htt ://www.a md. ov/

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Key Issues Identified in Investigation

Operations Integrity Management System

• Process Hazard Analysis

• ec an ca ntegr ty

• Worker Participation

• Process Safety Regulatory Gaps

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Issue: Process Hazard Analysis

• PHA failed to ade uatel consider

hydrocarbons reaching the ESP – PHA onl considered carbon monoxideentering the ESP

– As a result, detectors used to shut down thewere on y ca rate to rea car on

monoxide

determine rationale behind the ExxonMobil

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Issue: Process Hazard Analysis Cont.

• S ent Catal st Slide Valve not maintainin

catalyst level• H drocarbons in main column

• No analysis of steam flow rate needed into

column

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ssue: ec an ca n egr y

• Expander

• CO gas detectors

• • Valves attached to these heat

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ssue: or er ar c pa on

Incident Response Team• nput was not g ven or t e var ance

• Workers ex ressed concern for actionsbeing taken

• Job Safety and Environmental Analysis

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Controls Analysis

• Could have prevented incident throughutilization of assive barriers.

• Shutting all valves leading to the ESP, or

• A blind at the top of the main column.• HOC Principles could have been applied.

• Design of SCSV

• Removing HC from MC• Evaluate the use of modified HF

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Process Safety Management

approach focused on the prevention

releases of chemicals or energy from

a rocess associated with a facilit . • Elements of PSM include:

– Process Hazard Analysis (PHA),

– Operating Procedures, – Management of Change (MOC), and

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Management (PSM) Reform•

been identified under the current CA.

• Certain PSM elements fail to require an

completion.• Current PSM re ulation also lacks ke

process safety requirements• CA draft PSM regulations will be discussed

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n a ater pane ton g t


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•Previous CSB re orts have

identified similar regulatory gaps in’

regulations• evron e nery re

• Tesoro Refinery Fatal Explosion

and Fire (2010)

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ona ssues

•ESP Sitin

•Non-routine operating conditions

• a e y r ca qu pmenManagement

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nves ga on s ac es

safety-related documentation•ExxonMobil subpoena responses:

• 51%-Full Res onsive• 24%-Partially Responsive

•

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a orwar

this Meeting into the Investigation• na ze nvest gat on an an or eport

• Issue Re ort with Recommendations• Safety Video

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oar uest ons or nvest gat on eam

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Break

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PSM Panel

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ograp yhttp://2010.igem.org/User:Meagan/Oil_Sands (black oil picture)

"Electrostatic precipitator" by Evan Mason - Own work.Licensed under CC BY-SA 3.0 via Commons -

https://commons.wikimedia.org/wiki/File:Electrostatic_precipitat

or.svg#/media/File:Electrostatic_precipitator.svg

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exxonmobil presentation 2016.01

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