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Phase-Two
Water Detector
Phase Separation
Detection
What is Phase Separation
Full Phase Separation: Classic Definition
> Any time water enters a tank of ethanol-blended gasoline,
some of it binds to ethanol and stays suspended
> Continues until saturation, then ethanol-water mixture
falls to bottom of tank  Phase Separation
> A half-full 10’ 10k gallon tank with 20 gallons of water will
lead to 5” of PS
Partial Phase Separation: More Common Occurrence
> The water that does not stay suspended falls to the
bottom, pulling ethanol with it  you never have pure
water at the tank bottom
> Occurs far more often than full phase separation; needs
much less water
CLEAN
GASOLINE
PHASESEPARATED
GASOLINE
> Can still cause same damage as full phase separation
If you get water in a tank of ethanol-blended gasoline, you will get
phase separation
Effects of Phase Separation
Unsellable remaining
Damage to customer
Damage to existing
fuel
vehicles and brand
equipment
 Ethanol is octane-booster
 Removing PS leaves fuel
ethanol-depleted and suboctane
 PS damages cars’ engines
 Liability with station owner
 Unhappy customers talk 
6:00 news
 Older tanks are only
compatible to E10
 PS is E75-E80
 PS leads to tank corrosion
Left undetected, Phase Separation can corrode your tanks, your
customers’ engines, and your profits
What phase separation can cost you
Early detection
> No cars have been affected
> No lines have been affected
Remedy
> May be automatically resolved with
another delivery of fuel
> Pump out a couple inches of PS from
bottom of tank to sweeten load
Stage
1
Early Detection
Implications
> Lost fuel
> Service contractor
> Lost business
Problem controllable if caught early
($300)
($300)
($0)
$600
What phase separation can cost you
Later detection
> Depleted fuel now out of spec
Remedy
> Pump out entire tank of fuel
> Tank down for a few hours
Implications
> Lost fuel
> Service and repairs
> Lost business
Stage
2
($10,000)
($1,000)
($500)
$11,500
Clogged Filters
Problem quickly becomes much more expensive to remediate
What phase separation can cost you
Damaged vehicles
> Cars stalled out on lot
> Legal liabilities
> Damaged reputation (evening news)
Remedy
> Pump out entire tank of fuel
> Repair damaged vehicles
> Purge lines
> Brand damage control
Stage
3
Damaged
Vehicles
Implications
> Lost fuel
> Service and repairs
> Lost business
Customer brand damage will harm your business
($10,000)
($4,000)
(unknown)
$$$$
What phase separation can cost you
Petroleum infrastructure
> Tanks/piping not rated for phase
separation start leaking
> EPA is at your front door
> Can bankrupt a small network
Remedy
> Extract underground tanks/piping
> Clean up leaking gas
> Deal with the EPA
Stage
4
Petroleum
infrastructure
Implications
> Lost fuel
> Service and repairs
> Lost business
($10,000)
($$$$)
($$$$)
Potential shutdown
Petroleum infrastructure damage may bankrupt an entire network
Current Detection Methods
1. Sticking tank with paste
2. Dispenser Fuel Filter
3. Automatic Tank Gauge
E-10
Gasoline
Layer
“Good”
“Bad”
Traditional
Water
Float
Description
Description
• Put paste on a long stick and
insert into tank
• Use dispenser filter specially
designed for phase separation
• If paste changes color,
indication of potential problem
Drawbacks
• Do not stick tank regularly
• Only detects PS at dispenser,
not in tank  remediation costs
are higher
• Difficult to follow consistent
procedure
• More frequent filter changes
adds additional cost
• Difficult to interpret results
• Lack of use / awareness
Drawbacks
Phase
Separation
Layer
Description
Water float sensor on electronic
probe detects level of water in
tank
Drawbacks
Density of phase separation
may be too low to raise water
float, making PS undetectable
Existing detection methods are either unreliable or detect too late
PHASE-TWO™ WATER DETECTOR
Inner Float (Phase Separation)
Outer Float (Water)
E-10 Gas
Inner Float Lifts
Phase
Separation
Stages of Inner Float Rising
Phase Separation Detected
The Veeder-Root Phase-Two Water Detector is the first and only solution to
continuously monitor and detect phase separation in an underground storage tank
Technical Details
> Reliable detection up to E-15
> Available for minimum 4” tank openings
> Better performance than traditional water float, even in pure gasoline  the new standard gasoline float kit
Specification
Traditional
Water Float
Phase-Two
Water Detector
NO
YES
Minimum Water Height
0.63”
0.38”
Minimum Fuel Height
3.1”
7.0”
± 0.10"
± 0.10"
NA
+ 0.75”
Reliable detection of phase separation
Accuracy in water
Accuracy in phase separation
Veeder-Root Compatibility
Consoles
TLS-450 (software v3A or higher)
TLS-350 / TLS-300 (software v30B or higher)
Probes
Compatible to Mag Plus probes (8463 / MAG7, 8, 9)
Not compatible with Standard Mag probes (8473 / MAG1, 2, 3)
Phase Separation: Summary
> If you get water in a tank of ethanol-blended gasoline, you will get Phase
Separation; existing detection methods are either unreliable or detect too late
> The Veeder-Root Phase-Two™ Water Detector is the first and only solution to
continuously monitor and detect phase separation in an underground storage tank,
protecting your:
> Customer Liabilities and Brand
> Fuel Quality
> Petroleum Equipment Infrastructure
> The Phase-Two is retrofittable to your existing Veeder-Root tank gauge
The earliest detection is the only protection
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