bulk fuel tank farm conditions in rural alaska€¦ · bulk fuel tank farm conditions in rural...
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Bulk Fuel Tank Farm Conditions in Rural Alaska
David Lockard P.E., Lead EngineerAlaska Energy Authority
Rural Energy Conference, FairbanksApril 26th, 2016
Alaska Energy Authority Mission:
“To Reduce the Cost of Energy in Alaska”
AEA is an independent and public corporation of the State of Alaska
Created by the Alaska Legislature in 1976
44.83.070: “ The purpose of the Authority is to promote, develop, and advance the general prosperity and economic welfare of the people of the state by providing a means of financing and operating power projects and facilities that recover and use waste energy and by carrying out the powers and duties assigned to it under AS 42.45.”
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History of Bulk Fuel Upgrades in Rural Alaska
2015 Bulk Fuel Tank Farm Assessment Report
Photos and deficiency lists from seven facilities (“Name that code violation!”)
Assessment scoring sheet, scores, and results
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Presentation Outline
Alaska Bulk Fuel Upgrade History Many of the earliest bulk fuel facilities in rural Alaska were built for the Bureau of Indian Affairs schools starting around 1920
First statewide bulk fuel assessment done around 1990
Through the 1990’s AEA did low‐budget bulk fuel repair projects.
Second statewide assessment was done in 1998 by AEA and included 170 communities
Since 2000, with Denali Commission and other funding: AEA has completed 78 bulk fuel upgrades AVEC has completed 29 bulk fuel upgrades
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2015 Bulk Fuel Tank Farm Assessment Report
Requested and Funded by the Denali Commission
Performed by AK Energy Authority
Assessment work was contracted to three engineering firms: CRW Engineering Group LLC ERM Alaska Inc. Great Northern Engineering LLC
Assessments Performed in 57 Communities in 2015
242 Bulk Fuel Tank Farm Facilities Assessed
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• History of flooding• Inadequate containment• Insufficient foundation• Missing pressure relief• Missing emergency vents• No overfill protection• No check valve at fill point• Improper valve material• Active leaks • Inadequate pipe supports• No evidence of grounding• No fence• Insufficient regulatory
signs• Regulatory plans not
available• No locks on closed tank
issue valves• Spill response equipment
not available
Tanks > 90 years old!Recommendation: Replace facility
History of flooding Threatened by coastal erosion
No secondary containment
No tank foundations Improper emergency venting
Excessive tank corrosion No overfill protection Missing pressure relief Active leaks No evidence of grounding Inadequate fence Insufficient egress Insufficient regulatory signs
Regulatory plans not available
Recommendation: Replace facility
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• History of flooding• Threatened by coastal
erosion• Inadequate secondary
containment• Missing emergency
venting• Excessive corrosion• Improper valve material• Active leaks• Inadequate pipe supports• Improper wiring• No evidence of grounding• No fence• Missing regulatory signs• Missing fire extinguishers• Inadequate separation
from buildings• No locks on closed tank
issue valves
Recommendation: Replace facility
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• History of flooding• Threatened by coastal
erosion• Inadequate secondary
containment• Missing emergency
venting• Excessive corrosion• Improper valve material• Active leaks• Inadequate pipe supports• Improper wiring• No evidence of grounding• No fence• Missing regulatory signs• Missing fire extinguishers• Inadequate separation
from buildings• No locks on closed tank
issue valves
Recommendation: Replace facility
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• Tank farm within 100’ of a well• Inadequate secondary containment• Failing tank foundations• Missing emergency venting• No check valve at fill point• Missing pressure relief• Improper valve material• Active leaks• Damaged or stressed flex connectors• Inadequate pipe supports• Improper wiring• No evidence of grounding• Insufficient egress• Missing regulatory signs• Missing fire extinguishers• Regulatory plans not available• Spill response equipment not available
Recommendation: Replace facility
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• Tank farm within 100’ of a well• Inadequate secondary containment• Failing tank foundations• Missing emergency venting• No check valve at fill point• Missing pressure relief• Improper valve material• Active leaks• Damaged or stressed flex connectors• Inadequate pipe supports• Improper wiring• No evidence of grounding• Insufficient egress• Missing regulatory signs• Missing fire extinguishers• Regulatory plans not available• Spill response equipment not available
Recommendation: Replace facility
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• Inadequate secondary containment
• Insufficient or failing tank foundations
• Missing emergency venting
• Improper valve material
• Active leaks• Improper wiring• No evidence of
grounding• Insufficient egress• Missing regulatory
signs• Missing fire
extinguishers• Regulatory plans
unavailable
Recommendation: Replace facility
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• Inadequate secondary containment
• Insufficient or failing tank foundations
• Missing emergency venting
• Improper valve material
• Active leaks• Improper wiring• No evidence of
grounding• Insufficient egress• Missing regulatory
signs• Missing fire
extinguishers• Regulatory plans
unavailable
Recommendation: Replace facility
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• No secondary containment• Insufficient tank
foundations• Missing normal venting• Missing emergency venting• No overfill protection• Improper valve material• No evidence of grounding• No fence• Missing regulatory signs• Missing fire extinguishers• Missing regulatory
documents• No spill response equipment• Rubber hose in long‐term
use for fuel transfer
Recommendation: Replace facility
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• No secondary containment• Insufficient tank
foundations• Missing normal venting• Missing emergency venting• No overfill protection• Improper valve material• No evidence of grounding• No fence• Missing regulatory signs• Missing fire extinguishers• Missing regulatory
documents• No spill response
equipment• Rubber hose in long‐term
use for fuel transfer
Recommendation: Replace facility
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• Inadequate secondary containment
• Insufficient tank foundations
• Missing emergency venting• Excessive tank corrosion• Tanks not designed to
current standards• Missing pressure relief• Active leaks• No evidence of grounding• No fence• Missing regulatory signs• Missing fire extinguishers• Missing regulatory
documents• No locks on gates
Recommendation: Repair facility, paint tanks, provide secondary containment, signage, regulatory documents, and fence, replace piping, valves, vents, pumps, etc.
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• Inadequate secondary containment
• Insufficient tank foundations
• Missing emergency venting• Excessive tank corrosion• Tanks not designed to
current standards• Missing pressure relief• Active leaks• No evidence of grounding• No fence• Missing regulatory signs• Missing fire extinguishers• Missing regulatory
documents• No locks on gates
Recommendation: Repair facility, paint tanks, provide secondary containment, signage, regulatory documents, and fence, replace piping, valves, vents, pumps, etc.
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Facility Category Possible Points Awarded Points
Site LocationSite suitable for tank farm 0 points< 100 feet from a public well 10 points< 25 feet from an eroding bank or beach, or history of flooding 10 pointsGasoline tanks < 25 feet from an important building 10 points
30 points max.Secondary Containment*Liquid-tight, lined dike of proper volume and construction, 0 pointsor double wall or self diked tanks*Liquid-tight, lined dike of improper volume or construction 10 points*Fully diked but not liquid-tight (sand bag dike, gravel, torn or missing liner)20 points*Partial or no dike 30 points
30 points maxFoundations*Tanks on stable foundations (steel skids, min. 6” timbers, no cribbing) 0 points*Tanks directly on gravel pad or light timbers 5 points*Tanks directly on tundra or natural soils (no dike or liner, subject to erosion)10 pointsTanks leaning considerably or unstable foundations (seismic hazard) 10 points
20 points max.Tanks*Tanks in fair to good condition (no dents, min. rust, no major repairs needed)0 points*Immediate need of cleaning and painting 10 points*Rusted or dented beyond repair or riveted, bolted or other 30 points
30 points max.
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Piping (choose most likely to leak, i.e., victaulic, threaded or welded, only)*No piping or welded piping above grade 0 points*Welded piping below grade 5 points*Threaded piping above grade 10 points*Threaded piping below grade 20 points*Victaulic piping above grade 30 points*Victaulic piping below grade 40 pointsRubber hose 20 pointsAdditional for active leaks 20 points
80 points max.ElectricalWiring appears appropriate or there is no wiring. 0 pointsExposed wiring, improper grounding, etc. 10 points
10 points max.Life, Health & Safety*Appears code compliant (No extraordinary factors observed) 0 points*Low risk (Minor code violations that could result in personal injury to non-vigilant employees, such as tripping hazards, limited lighting, etc.) 10 points*Medium risk (More severe code violations that increase risk such as lack of security fence, falling hazards, unlocked valves, gravity dispensing, etc.) 20 points*High risk (Situations that pose an immediate threat to safety such as Fire hazards, gas leaks, failing tanks, unstable foundations, etc.) 40 points
40 points max.
Facility Total 240 points max.
Bulk Fuel Tank Farm Assessment Scores
Total # of scores: 242
Maximum Possible: 240
Maximum score: 195
Average score: 61
Median score: 50
Minimum score: 0
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Other Assessment Report Results Consultants recommended replacing 39 facilities
66 facilities environmentally threatened (flooding, riverine or coastal erosion, etc.)
Tank Farm Capacities (gallons) Maximum: 411,800 Average: 39,178 Minimum: 1,275
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