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<br /> Fabricated Steel Products>Shop Fabricated Tanks>SP001 Standard FAQs
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<br /> Inspection of aboveground storage tanks(ASTs)can be a critical compliance issue under the planning
<br /> 0 requirements of the U.S. Environmental Protection Agency's rule for Spill Prevention Control and Countermeasure
<br /> (SPCC).Steel Tank Institute in 2000 released the first version of Standard for the Inspection of Aboveground
<br /> Storage Tanks—the STI SP001 standard—which provides a means for AST owners to comply with EPA
<br /> mandates.The standard, now in its fifth edition, has been updated by consensus of tank owners,tank
<br /> SHOP FABRICATED manufacturers and other industry leaders. Dana Schmidt is the Standards Engineer for STI/SPFA and staff liaison to the
<br /> STI SP001 Committee. She can be contacted at dschmidt@steeltank.com
<br /> TANKS
<br /> Quality Control Program FREQUENTLY ASKED QUESTIONS ABOUT
<br /> STI CP Testers and SP001 SP001
<br /> Inspectors
<br /> PRESSURE VESSELS Question#1: Does STI SP001 comply with EPAs requirement for tank integrity testing?
<br /> Answer:STI SP001 meets the intent of 40 CFR 112.8(c)(6)which states, "Test or inspect each aboveground
<br /> FIELD ERECTED WATER container for integrity on a regular schedule and whenever you make material repairs. You must determine, in
<br /> accordance with industry standards,the appropriate qualifications for personnel performing tests and inspections,
<br /> TANKS the frequency and type of testing and inspections,which take into account container size,configuration,and
<br /> design (such as containers that are: shop-built,field-erected, skid-mounted,elevated, equipped with a liner,
<br /> STEEL WATER PIPE double-walled,or partially buried). Examples of these integrity tests include, but are not limited to:visual
<br /> inspection, hydrostatic testing, radiographic testing, ultrasonic testing,acoustic emissions testing,or other
<br /> AWARD WINNING systems of non-destructive testing.You must keep comparison records and you must also inspect the container's
<br /> PRODUCTS supports and foundations. In addition,you must frequently inspect the outside of the container for signs of
<br /> deterioration,discharges,or accumulation of oil inside diked areas. Records of inspections and tests kept under
<br /> usual and customary business practices satisfy the recordkeeping requirements of this paragraph."
<br /> STEEL FACTS
<br /> Question #2: Why does STI SP001 require internal inspections when one cannot easily access the
<br /> SUSTAINABLE STEEL inside of a small shop-fabricated tank?
<br /> Answer: STI SP001 does not mandate entry into a tank for any tank under 30,000 gallons(113,529 liters). For
<br /> tanks under 30,000 gallons,either internal inspections are not required,or else an alternative is given with the
<br /> use of leak-test inspections.Tanks larger than 30,000 gallons usually have manways to allow personnel entry.
<br /> SP001 Question#3:Does the STI SP001 standard include inspection of fiberglass and other plastic tanks?
<br /> Answer: Overall,the standard focuses primarily on inspection of welded, metal, shop-fabricated and field-
<br /> STANDARDerected tanks.Also included is the inspection of smaller, portable containers such as 55-gallon drums,
<br /> intermediate bulk containers(IBCs)and other such containers that may be of metal or plastic construction.
<br /> RELATED
<br /> Inspection of non-portable,shop-fabricated plastic or fiberglass tanks is not included. See the definitions within
<br /> LINKSthe standard for more specific questions related to size and material of construction.
<br /> Question#4: The pre-2005 edition of STI SP001 gave specific instructions on the number of UT
<br /> Purchase the SP001 Standard readings to be taken on everytank.This ensured that each inspector did inspections exactly alike.
<br /> List of SP001 Certified Tank Inspectors Does the latest edition of the standard allow a tester to take one reading on the shell of the tank and
<br /> claim he tested the tank for an area where corrosion was most apt to occur?
<br /> Answer:The previous STI SP001 standard did not use a risk-based approach, but made the UT testing a
<br /> requirement on all tanks in all conditions. It required thousands of readings with some tank capacities.The third
<br /> and fourth editions place a much greater emphasis on a risk-based approach to the inspection process.The
<br /> newer editions do specify the number of UT readings to take per square foot of surface area, but they do not
<br /> necessarily establish specific areas for such readings.The STI SP001 standard expects a certified inspector to
<br /> use appropriate judgment on where corrosion is most apt to occur.A certified inspector will understand the
<br /> environmental,fire prevention,and life-safety issues involved. For internal inspections,the standard requires 100
<br /> percent UT of areas that cannot be visually inspected (for example,the bottom of a tank resting on the ground).
<br /> For external inspections, paragraph 7.3.1.1 states:"Take and record ultrasonic thickness testing (UTT)readings
<br /> and the location of the reading of each plate or shell course in areas accessible without entering the AST.
<br /> Readings must be concentrated in areas where corrosion is likely to occur. If significant internal corrosion is
<br /> detected,further investigation using ultrasonic testing scans(UTS) is required."[See the standard for definitions
<br /> of UTT and UTS].
<br /> Question#5: Are the checklists in Appendix C copyrighted?
<br /> Answer: No, but the rest of the standard is copyrighted. Word versions of these checklists are available here
<br /> Note that these checklists are to be used in conjunction with the STI Standard SP001 and the utilization of the
<br /> checklists alone do not constitute compliance with STI SP001. The STI Standard SP001 may be purchased here
<br /> Question#6: My tank contains sulfuric acid (or hydrochloric acid,etc.).Can STI SP001 be used to
<br /> inspect this tank?
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