United States
Environmental Protection
Agency
Solid Waste And
Emergency Response
5403W
EPA510-B-93-004
November 1993
Doing Inventory Control Right
For Underground Storage Tanks
i Printed on Recycled Paper
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Why You Should Read This Booklet If You
Use Inventory Control
Federal and state laws require underground storage tanks (USTs)
to have leak detection.
If your USTs do not have leak detection, you can be cited for
violations and fined. Leak detection violations can also keep
you from getting legally required insurance coverage and
reimbursement for cleanup costs. Without leak detection, you
constantly risk discovering a leak only after it becomes a major
financial burden for yourself and an environmental problem for
everyone.
If inventory control is part of your leak detection, then this
booklet can help you make sure you do inventory control
correctly.
Inspections conducted nationwide indicate that most people
who think they are doing inventory control are not doing it in a
way that is likely to find leaks and meet the law's requirements
for leak detection. So even if you are SURE you are doing
inventory control right, read this booklet carefully—it could save
you a lot of grief and money.
If you need information on federal leak detection requirements
and the various methods of leak detection available to you, see
"Straight Talk On Tanks." Call EPA's toll-free Hotline at 800
424-9346 and order this free publication by number: EPA
530/UST-90/012.
Straight Talk On Tanks
-1-
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How Does Inventory Control Work?
This booklet helps you use inventory control to meet federal
regulatory leak detection requirements by showing you how
to do three important tasks:
• Good sticking
• Good math
• Good recordkeeping
Without these three, you may fail to meet the leak detection
requirements. To do inventory control right, you have to
spend time to make sure that you consistently measure the
tank's contents correctly, that you don't let math errors
creep into your daily and monthly calculations, and that you
keep complete, easy-to-read records on file for at least a
year.
Basically, inventory control requires daily measurements of
tank contents and math calculations that let you compare
your "stick" inventory (what you've measured) to your
"book" inventory (what your recordkeeping indicates you
should have). Some people call this process "inventory
reconciliation." If the difference between your "stick" and
"book" inventory is too large, your tank may be leaking.
Be sure you read about several important restrictions on the
use of inventory control that are described on the next page.
To use INVENTORY CONTROL correctly,
follow Steps 7—5 starting on page 6.
-2-
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Please note these important restrictions on the use of
inventory control as leak detection:
• Inventory control can never be used alone. Inventory control
must always be used in combination with tank tightness
testing. Tanks must be tightness tested every 12 months if
they do not have corrosion protection and spill/overfill
devices. Tanks with corrosion protection and spill/overfill
devices must be tested every 5 years.
• Inventory control is a TEMPORARY leak detection method.
You can use inventory control only for 10 years after
installing a new tank that has corrosion protection and
spill/overfill devices or for 10 years after upgrading an old
tank with corrosion protection and spill/overfill devices. After
the 10-year period, you must use a monthly monitoring
method, such as groundwater monitoring or interstitial
monitoring.
Tanks without corrosion protection and spill/overfill devices
can use inventory control only until December 1998, when
these tanks must be upgraded or closed. (See "Straight Talk
On Tanks.")
• The combined use of inventory control and tank tightness
testing does not meet your tank system's leak detection
requirements for piping. Pressurized and some suction piping
must use other methods of leak detection, such as interstitial
monitoring. (See "Straight Talk On Tanks.")
If you don't pay careful attention to these
restrictions, you will fail to meet the leak detection
requirements.
-3-
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Do You Have The Right Equipment?
Gauge Stick Or Other Gauges
The gauge stick used to measure the depth of liquid in an
underground tank must be marked or notched to the Va inch, starting
with zero at the bottom end. Check your stick to be sure the end
has not been worn or cut off and that the stick is not warped. The
stick should be made of non-sparking material, such as wood, and
varnished to minimize the creeping of fuel above the actual fuel level
in the tank. Instead of using a gauge stick, you may use a
mechanical or electronic tank level monitor. Whatever measuring
device you use must be capable of measuring the level of product
over the full range of the tank's height to the nearest Va inch.
Pastes For Finding Water Or Fuel
You must check for water in the bottom of the tank at least once
each month by smearing a water-finding paste along the bottom of
the gauge stick. The paste changes color when it comes in contact
with water. Many operators improve their stick readings by
smearing a fuel-finding paste on about 6 inches of the stick where
they expect the fuel level to be. Fuel-finding paste changes color
when it comes in contact with fuel.
Forms
The instructions in this booklet are keyed to two forms: the "DAILY
INVENTORY WORKSHEET" and the "MONTHLY INVENTORY RECORD." You
will find filled-in sample copies of these forms on the last two pages
of this booklet. These samples are on perforated pages, so tear
them out and refer to them while you read through the directions
that are keyed alphabetically to the sample forms. Also, near the
back of the booklet, you will find "masters" you can copy repeatedly
to provide forms for use in your recordkeeping. If these forms are
filled out according to the instructions in this booklet, you will be in
compliance with federal regulations for inventory control. You
should find out if state or local requirements have limitations on the
use of inventory control or have requirements that are different from
those presented in this booklet. You can use other standard
recordkeeping forms, as long as they are clear, consistent, and
contain all the information required by the federal and state leak
detection regulations.
-4-
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Tank Chart
A tank chart is a table that converts the number of inches of liquid
in the tank into the number of gallons. You need a tank chart that
exactly matches your storage tank (tank manufacturers usually
provide charts for their tanks). If you have more than one tank, you
will need a chart for each tank unless the tanks are identical. The
tank chart must show conversion to gallons for each Va inch stick
reading. If your tank chart does not convert each 1/a inch reading into
gallons, contact the tank manufacturer, or, if you have a steel tank,
the Steel Tank Association (708 438-8265) to get an appropriate
chart.
You always need to convert inches into gallons in order to fill out the
forms correctly and to do the necessary math. To convert inches
into gallons, find your stick's reading to the nearest 1/a inch on the
tank chart, then simply read across to the gallons column to find the
number of gallons. If you cannot get a tank chart showing
conversion to gallons for each Va inch reading, you must do the
additional math explained on page 9.
Drop Tube
The fill pipe through which the fuel is delivered into the tank must
have a drop tube extending to within 1 foot of the bottom of the
tank. Stick measurements should be made through a drop tube in
the fill pipe or gauging port. If your fill pipe does not have a drop
tube, call your petroleum equipment supplier to have one installed.
Calibrated Dispensing Meters
Meters must be calibrated according to local standards.
Manifolded Tanks
If you have manifolded tanks or dispensers that blend fuel, consider
these tanks as one tank system if they share a common inventory
of stored fuel. As you follow the directions on the following pages,
you will need to combine your measurements and calculations for all
the tanks manifolded into one system.
-5-
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Step 1— Measure The Tank's Contents
Use the sample "DAILY
INVENTORY WORKSHEET"
from the fast two
pages of the booklet
to see where you put
the information from
fetters "A" through
"M" in the following
directions.
You must measure the tank every day that fuel is added or removed. You
may take measurements using a gauge stick or a mechanical or electronic
tank level monitor.
No fuel can be added or removed from the tank while you are performing
Step 1 or Step 2.
Every day you measure the tank, you should fill out a "DAILY INVENTORY
WORKSHEET." As you go through the following directions, refer to the
sample DAILY INVENTORY WORKSHEET you will find on the last pages of this
booklet. For easy reference, the sample is on a perforated page so you can
tear it out and keep it handy as you read through the directions. Also, near
the back of the booklet is a "master copy" on a perforated page you can
tear out to make copies of the DAILY INVENTORY WORKSHEET for your
recordkeeping.
Fill in the identifying information at the top of the worksheet.
Next to the "TANK IDENTIFICATION" box are empty vertical columns.
Each column represents one tank—consistently enter all information
on that one tank in the same vertical column. NOTE: Once you
have filled in the tank identification boxes, make copies of the
worksheet so you won't have to repeatedly enter the same
information.
USE GOOD STICKING PRACTICES: Slowly lower the gauge stick to the
tank's bottom. Let the stick gently touch the bottom, then quickly bring it
back up. Read the depth of fuel indicated by the wet mark to the closest
Vs inch division on the stick. Use of fuel-finding paste will make your stick
readings more accurate.
Write your measurement in the box labeled "END STICK INCHES" for
the tank you measured.
NOTE: If your tank is equipped with an automatic tank gauge (ATG), you
may record the inches of product and gallons of product directly from the
ATG's printed tape or simply staple the tape with this information to the
worksheet.
-6-
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Step 2 —Record The Amount Pumped
At the same time you measure the tank contents (Step 1), you must record
on the DAILY INVENTORY WORKSHEET the amount of fuel pumped. No fuel can
be added or removed from the tank while you are sticking the tank and
recording the amount pumped.
Locate the box labeled "AMOUNT PUMPED" on the left side of the
worksheet. Copy the numbers from each dispenser's totalizer onto
the worksheet. Be very careful that you write all the meter readings
for a tank in the same column. You may have several dispensers
and totalizers for one tank, so the worksheet provides boxes in
which you can enter several readings in any order.
Add up the totalizer meter readings in each column and write the
result in the box labeled "TODAY'S SUM OF TOTALIZERS."
Find the last DAILY INVENTORY WORKSHEET you completed. Copy
"TODAY'S SUM OF TOTALIZERS" from that worksheet into the "Previous
Day's Sum of Totalizers" box of the worksheet you are working on
today.
On today's worksheet, subtract "Previous Day's Sum of Totalizers"
from "TODAY'S SUM OF TOTALIZERS" and write the result in the box
labeled "AMOUNT PUMPED TODAY."
You may have an alternative to reading totalizers. If you have a self-
service fueling operation where the cashier can authorize fuel sales from
inside the facility, you can probably print out a daily report that gives you
the total sales for each type of fuel. NOTE: You can use the sales
volumes from this report instead of reading your totalizer meters only if no
fuel sales are made between the time you print the report from the cash
register and the time you measure your tanks (Step 1).
If you are using cash register reports to record the amount pumped,
enter the amount of each type of fuel pumped in the box labeled
"AMOUNT PUMPED TODAY" or staple the printout to the worksheet.
// you pumped fuel
through a dispenser
and back into a tank,
for example during a
test subtract the
number of gallons
you pumped from
"AMOUNT PUMPED
TODAY."
-7-
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Step 3 —Record Fuel Deliveries
You must check how much fuel has been delivered every time any amount
of fuel is delivered to your tank. NOTE: You should not pump any fuel
during the time it takes to do items "I" and "J" below.
Before the delivery begins, the liquid level in the tank must be measured.
Always use good sticking practices: slowly lower the gauge stick, gently
touch the stick to the bottom of the tank, then quickly bring the stick back
up. Read the depth of fuel indicated by the wet mark to the nearest Va inch
division on the stick,
Write your measurement in the box labeled
Delivery" for each tank you measured.
'Inches of Fuel Before
An automatic tank
gauge (A TGI can
usually print a delivery
report. If your tank
has an ATG that
prints such a report,
you may simply staple
the A TG rs deffvery
report to the DAILY
INVENTORY WORKSHEET.
The delivery person can now deliver fuel into the tank. After the delivery,
wait at least 5 minutes for the fuel level in the tank to stabilize, and then
measure again as described above.
Record fuel level in the box labeled "Inches of Fuel After Delivery."
Using your tank chart with Vs inch readings, convert both delivery
readings to the correct number of gallons. Record these numbers in
the boxes labeled "Gallons of Fuel Before Delivery" and "Gallons of
Fuel After Delivery." (If necessary, see page 9 on converting inches
into gallons.)
Subtract "Gallons of Fuel Before Delivery" from "Gallons of Fuel
After Delivery." Record the result in the box labeled "GALLONS
DELIVERED (STICK)."
Now look at the delivery receipt and find the volume of each type of
product that was delivered. If two volumes are given, one labeled "net"
and the other "gross," use the gross gallons as the volume of product
delivered.
For each type of fuel delivered, copy the gross gallons delivered from
the delivery receipt onto the worksheet in the box labeled "GROSS
GALLONS DELIVERED (RECEIPT)." The gallons in items "L" and "M"
should roughly match. If they don't, contact your supplier.
-8-
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Using Tank Charts Without Ve Inch Conversions
If your tank chart does not list direct conversions from inches to gallons for
overy Va inch, then you must do the additional math described below every
time you stick your tank.
The easiest way to explain this procedure is with an example. Let's say
you have a stick reading of 43% inches and you need to figure how many
gallons are in your tank.
1
Look on your tank chart and find the inch measurements that are
just above and below your stick reading and write down the number
of gallons for these inch readings. Subtract the gallon readings to
find the difference between the two readings:
Chart reading at 44 inches:
Chart reading at 43 inches:
3,585 gallons
3,480 gallons
Difference:
105 gallons
2. Dividing 105 by 8 will give you the number of gallons per 1/a inch,
which in this example is 13. (More exactly it is 13.125, but do
round off the number to the nearest whole number.) Because your
fraction is %, multiply 13 gallons by 3, which gives you 39 gallons
as the volume represented by % inch.
CAUTION: The gallons represented by each VB inch will vary from
top to bottom of the tank and must be calculated for each
conversion.
3. Take the number of gallons you have just calculated and add it to
the inch reading just below your actual stick reading:
Chart reading at 43 inches:
Gallons at % inch:
3,480 gallons
+ 39 gallons
Sum: 3,519 gallons
Thus, your stick reading of 43% inches converts to 3,519 gallons.
NOTE: If your tank chart is in half or quarter inches, you must still use this
procedure so that your gallon readings are accurate to Va inch.
After all of this math, you can see why it pays to have the correct tank
chart that indicates gallons for each VB inch.
-9-
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Step 4—Calculate Daily Changes In Inventory
Use the sample
"MONTHLY INVENTORY
RECORD" from the last
two pages of the
booklet to see where
you put the
information from
tetters "N" through
"Z" in the following
directions.
In this step, you will copy information from the DAILY INVENTORY WORKSHEET
onto the MONTHLY INVENTORY RECORD. You will then do some math to
determine your daily inventory. You need one MONTHLY INVENTORY RECORD
for each tank that you have.
As you go through the following directions, refer to the sample MONTHLY
INVENTORY RECORD you will find on the reverse side of the DAILY INVENTORY
WORKSHEET sample you have already been using. For easy reference, the
sample is on a perforated page so you can tear it out and keep it handy as
you read through the directions. Also, near the back of the booklet is a
"master copy" on a perforated page you can tear out to make copies of the
MONTHLY INVENTORY RECORD for your recordkeeping.
Fill in the identifying information at the top of the MONTHLY INVENTORY
RECORD.
If this is the very first day of your inventory recordkeeping, convert the
"END STICK INCHES" from the DAILY WORKSHEET into gallons and enter on the
MONTHLY RECORD under "END STICK INVENTORY (GALLONS)" for that startinc
date. (If necessary, see page 9 on converting inches into gallons.) This is
all you can do today. Starting tomorrow, follow all of the instructions listed
below.
Find the line in the left column on the MONTHLY RECORD with today's
date listed. Copy the previous day's "END STICK INVENTORY
(GALLONS)" number into the box for today's "START STICK INVENTORY
(GALLONS)."
Enter the amount of fuel delivered from the DAILY INVENTORY
WORKSHEET. If you were NOT pumping fuel during the time when the
delivery was taking place, then use the "GALLONS DELIVERED (STICK)"
number. However, if you had to pump fuel while the delivery was
taking place, then use the "GROSS GALLONS DELIVERED (RECEIPT)"
number as your delivery amount.
[•1 Copy the "AMOUNT PUMPED TODAY" number from the DAILY INVENTORY
WORKSHEET into the "GALLONS PUMPED" column of the MONTHLY
INVENTORY RECORD.
-10-
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Add the "START STICK INVENTORY (GALLONS)" and the "GALLONS
DELIVERED" columns; then subtract the "GALLONS PUMPED" column.
Enter the result in the column labeled "BOOK INVENTORY (GALLONS)."
Copy the "END STICK INCHES" number from the DAILY WORKSHEET into
the column labeled "END STICK INVENTORY (INCHES)" on the MONTHLY
RECORD. Convert inches into gallons and enter the result in the
column on the MONTHLY RECORD labeled "END STICK INVENTORY
(GALLONS)." (If necessary, see page 9 on converting inches into
gallons.)
Subtract the "BOOK INVENTORY (GALLONS)" from the "END STICK
INVENTORY (GALLONS)." Enter the difference into today's "DAILY OVER
OR SHORT" box. This number will usually be a positive or negative
number (only rarely will it be zero).
Enter your initials to show who entered today's information.
At least once each month, you must also measure for water in the tank.
Smear water-finding paste on the bottom few inches of the gauge stick.
Open the fill pipe and slowly lower the stick to the tank's bottom. Hold the
stick on the bottom for 10 seconds for gasoline (30 seconds for diesel).
Then remove the stick. If there is water in the bottom of the tank, the
water-finding paste will change color. Read the depth of water indicated by
the line where the water-finding paste has changed color to the closest Va
inch division on the stick. Do not use this stick reading to measure the
amount of fuel in the tank, because the fuel will creep up the stick and will
give you an inaccurate reading.
If you checked the tank for water today, enter the number of inches
of water in the tank on the line under "Facility Name" at the top of
the monthly record. If there is no water present, enter a zero to
indicate that you in fact checked for water but found none. If you
find more than 1 inch of water, you should arrange for its immediate
removal, notify the product supplier, and conduct further tests to
ensure that the tank is not leaking.
GOOD ADVICE: If
you are "over" for 5
days in a row (or
"under" for 6 days in
a row), you should
check for problems
with your math and
your UST.
-11-
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NOTE: Keep your
inventory control
records on file for at
least 1 year, Your
state, however, may
have different rules
about when you have
to report a teak or
how long you must
keep the inventory
records. Be sure you
know the rules that
apply to you.
Step 5— Calculate Monthly Changes In Inventory
At the end of each month, follow the directions below to see if the
difference between "stick" and "book" inventory indicates a possible leak.
Add all of the month's "GALLONS PUMPED" numbers and write this
total at the bottom of the column in the box labeled "TOTAL GALLONS
PUMPED."
Add all the month's "DAILY OVER OR SHORT" numbers: pay careful
attention to positive and negative numbers to get an accurate total.
For example, adding +4 and +3 and -2 should equal +5. Enter the
total at the bottom of the column in the box labeled "TOTAL GALLONS
OVER OR SHORT."
Fill out the "LEAK CHECK" line at the bottom of the MONTHLY
INVENTORY RECORD 3S follows:
• Take the "TOTAL GALLONS PUMPED" number and drop the last
two digits to get 1 % (for example: 6594 becomes 65).
• Add 130 (for example: 65 + 130 = 195).
Enter the result of this calculation at the end of the "LEAK CHECK"
line. This number is the maximum change in inventory allowed by
federal regulations (1% of throughput plus 130 gallons).
At the bottom of the MONTHLY INVENTORY RECORD, circle "YES" or
"NO" to show whether your "TOTAL GALLONS OVER OR SHORT"
number is LARGER than the "LEAK CHECK" number you identified in
the previous item. Even if your "TOTAL GALLONS OVER OR SHORT" is
a negative number, treat it as a positive number for the purpose of
this comparison. For example, -74 would become +74.
If you circle "YES" for 2 months in a row, you must notify your
regulatory agency as soon as possible (usually within 24 hours) that
your tank may be leaking.
-12-
U.S. GOVERNMENT PRINTING OFFICE: 1994 - 515-003 - 1302/01025
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DAILY INVENTORY WORKSHEET
FACILITY NAME:
YOUR NAME:
DATE:
TANK IDENTIFICATION |
Type of Fuel
—
Tank Size in Gallons
END STICK INCHES
AMOUNT PUMPED
Totalizer Reading
Totalizer Reading
Totalizer Reading
Totalizer Reading
Totalizer Reading
Totalizer Reading
Totalizer Reading
Totalizer Reading
TODAY'S SUM OF TOTALIZERS
Previous Day's Sum of Totalizers
AMOUNT PUMPED TODAY
DELIVERY RECORD
Inches of Fuel Before Delivery
Gallons of Fuel Before Delivery
(from tank chart)
Inches of Fuel After Delivery
Gallons of Fuel After Delivery
(from tank chart)
GALLONS DELIVERED (STICK)
[Gallons "After" - Gallons "Before")
GROSS GALLONS DELIVERED
(RECEIPT)
I Ssfe-W
1 lIlaKw
1 1 |p^ ffi?&s*
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-------
MONTHLY INVENTORY RECORD
TANK IDENTIFICATION & TYPE OF FUEL:
MONTH/YEAR :
FACILITY NAME:
DATE OF WATER CHECK:
LEVEL OF WATER (INCHES):
DATE
1
2
3
4
5
6
7
8
9
10
It
12
13
14
15
16
17
18
19
20
21
22
23
24
2S
26
27
28
29
30
31
START STICK BOOK
INVENTORY GALLONS GALLONS INVENTORY
(GALLONS) DELIVERED PUMPED (GALLONS)
(+> (-) (=)
(+) (-) (=)
(+) (-) (=)
(+) (-) (=)
(+) (-) (=)
(+) (-) (=)
(+) (-) (=)
(+) (-) (=)
(+) (-) (=)
(+) (-) (=)
( + ) (-) (=)
(+) (-) (=)
(+) (-) (=)
(+) (-) (=)
(+) (-) (=)
(+) (-) (=)
(+) (-) (=)
( + ) (-) (=)
( + ) (-) (=)
(+) (-) (=)
(+) (-) (=)
(+) (-) (=)
(+) (-) (=)
(+) (-) (=)
(+) (-) (=)
(+) (-) (=)
(+) (-) (=)
(+) (-) (=)
(+) (-) (=)
(+) (-) (=)
(+) (-) (=)
END STICK INVENTORY
(INCHES) | (GALLONS)
TOTAL GALLONS PUMPED > 1 1 TOTAL GALLONS OVER OR SHORT >
DAILY OVER ( + )
OR SHORT (-)
["End" - "Book"]
INITIALS
DROP THE LAST 2 DIGITS from the
PUMPED number and enter on the
LEAK CHECK:
TOTAL GALLONS
line below
Compare these
130
numbers
gallons
Is "TOTAL GALLONS OVER OR SHORT" LARGER than "LEAK CHECK" result? YES NO (circle one)
If answer is "YES" for 2 MONTHS IN A ROW, notify regulatory agency as soon as possible.
KEEP THIS PIECE OF PAPER ON FILE FOR AT LEAST 1 YEAR
-------
DAILY INVENTORY WORKSHEET
3 FACILITY NAME: l^AST
YOUR NAME: x7l//W J>0 £•
DATE:
TANK IDENTIFICATION
1
v-
Type of Fuel
K&a (JUL
Tank Size in Gallons
Totalizer Reading
Totalizer Reading
Totalizer Reading
Totalizer Reading
Totalizer Reading
Totalizer Reading
TODAY'S SUM OF TOTALIZERS
tietr
Previous Day's Sum of Totalizers
If I? I
AMOUNT PUMPED TODAY
12-SV
DELIVERY RECORD
I5-S5-
-------
MONTHLY INVENTORY RECORD
TANK IDENTIFICATION & TYPE OF FUEL: ty M IP&JM&& t/A/*'
MONTH/YEAR
: V /
FACILITY NAME:
DATE OF WATER CHECK:
LEVEL OF WATER (INCHES):
DATE
START STICK
INVENTORY
(GALLONS)
GALLONS
DELIVERED
GALLONS
PUMPED
BOOK
INVENTORY
(GALLONS)
END STICK INVENTORY
(INCHES)
(GALLONS)
DAILY OVER ( + )
OR SHORT (-)
["End" - "Book"]
INITIALS
( + )
> 53 «
32 ?r
- 13
31
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11
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12
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13
14
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15
16
17
57? (+>
-3
18
19
-4
20
(+)
5MV*
21
(+)
22
f
23
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24
-) 31 I <-
25
( + )
-) 239 < =
26
27
-) Z6V <-
28
P2?t>
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29
30
(+)
31
TOTAL GALLONS PUMPED >
TOTAL GALLONS OVER OR SHORT >
DROP THE LAST 2 DIGITS from the I TOTAL GALLONS
PUMPED number and enter on the * line below
CHECK: &5
Compare these
130
numbers
gallons
Is "TOTAL GALLONS OVER OR SHORT" LARGER than "LEAK CHECK" result? YES /NO/ (circle one)|
If answer is "YES" for 2 MONTHS IN A ROW, notify regulatory agency as soon as possible.
KEEP THIS PIECE OF PAPER ON FILE FOR AT LEAST 1 YEAR
-------
> > > Copy and post this reminder where employees
who measure tanks can see it!< < <
GET GOOD INVENTORY CONTROL
MEASUREMENTS!
• Measure each tank every operating day
• Use gauge sticks that are
t/ marked to the Va inch
i/ not cut off or worn off at the "0" end
%/ varnished and not warped
• Measure through the same drop tube each time
• Use good sticking practices
S SLOWLY lower stick
S GENTLY touch stick on tank bottom
./ QUICKLY pull stick out
• Measure just before each delivery
• Wait at least 5 minutes after delivery,
then measure again
• Read and record totalizer meters carefully
• Check for water at least once a month
using water-finding paste
-------
Developed in cooperation with.
Fiberglass
Petroleum Tank & Pipe Institute
INTERNATIONAL ASSOCIATION OF TANK TESTING PROFESSIONALS
iPEIj
"f UM EQUIPMENT INS%
PETROLEUM
MARKETERS
ASSOCIATION1*
AMERICA
service STATION DCALERS OF AMERICA
[ CM-MA • • SOCIETY OF INDEPENDENT
[SIGMAJI GASOLINE: MARKETERS
OF AMERICA
n
Steel
Tank
Institute
------- |