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Home My WebLink AboutAboveground storage tank requirements � . t, , 4 ��_� General Requirements for Aboveground Storage Tanks Minnesota Poliution Control Tanks/Aboveground Storage Tanks#1.02 • April 2004 Agency his fact sheet outlines the • temporary tanks requirements for regulated above- . tanks that are less than 500 gallons ground storage tanks (ASTs)found in Minn. R. chs. 7001 and 7151. These rules apply to all ASTs storing a liquid AST requirements substance that is not gaseous or solid at Owners and operators must comply with ambient temperature and pressure. AST requirements in Minn. R. 7151, unless The Minnesota Pollution Control Agency exempted as outlined below. (MPCA)must be notified about all ASTs Many ASTs are exempt from Minn. R. ch. within 30 days of installation or change in 7151. They are: tank status(Minn. Stat. § 1 16.48). • tanks containing 500 gallons or less The AST rules and notification statute does not indicate a minimum tank size,but the • farm tanks MPCA considers the smallest AST . residential tanks 1,100 gallons or less requiring registration to be a tank that is used for noncommercial purposes 500 gallons or greater in capacity. This size . equipment or machinery containing is consistent with underground storage tank notification requirements. substances for operational purposes like hydraulic lift tanks,heating and Owners and operators must complete and cooling equipment, and electrical submit the AST Notification Form to the equipment MPCA. To get a copy of this form, call . vehicles designed and used to transport MPCA at 651-296-6300 or toll-free at substances that don't remain at the 1-800-657-3864 or on the MPCA Web site same location for more than 30 at www.pca.state.mn.us/cleanup/ast. consecutive days or refill at the same site after dispensing the tank's contents Exemptions from notification . heating oil tanks 1,100 gallons or less Tanks not required to be registered . wastewater treatment facility include: equipment • farm or residential tanks 1,100 gallons . indoor tanks or less storing motor fuel for . tote tanks noncommercial purposes • heating oil tanks 1,100 gallons or less • tanks greater than 500 gallons capacity, but less than or equal to 1,100 gallons • agricultural chemical tanks capacity that are more than 500 feet • tanks storing liquids that are a gas at from surface water atmospheric temperature and pressure • tote tanks t-a 1-02 Minnesota Pollution Control Agency • 520 Lafayette Rd. N., St. Paul, MN 55155-4194 • www.pca.state.mn.us 651-296-6300 • 800-657-3864 • TTY 651-282-5332 or 800-657-3864 • Available in alternative formats • septic tanks Requirements for AST facilities with a • a surface impoundment, pit, pond, or lagoon capacity greater than one million gallons • stormwater collection systems Facilities with greater than one million gallons total capacity for all liquid storage tanks must apply to the • temporary tanks (tanks at a site less than 30 days MPCA for a major facility permit. Requirements for • storage tanks with drinking water, filtered-surface tanks at these facilities are based on the individual site water, demineralized water, noncontact cooling and tank characteristics(Minn. R. 7001.4200). water, or water stored for emergency purposes Requirements for small tanks near surface Requirements for regulated tanks greater Water thatl 1,100 gallOnS Regulated tanks with a capacity of greater than 500 gallons, but less than or equal to 1,100 gallons that are All regulated tanks with a capacity greater than 1,100 within 500 feet of a class 2 surface water(water that can gallons must: be used for recreational purposes)are required to: • be registered with the MPCA . be registered with the MPCA • be labeled • be labeled • be constructed using appropriate industry standards . provide secondary containment • have secondary containment . have a sign at the facility • have a facility sign posted . be constructed using appropriate industry standards • have substance transfer area safeguards Requirements for temporary tanks • have internal and/or external corrosion protection Tanks larger than 1,100 gallons that store product for • have overfill protection longer than 30 days, but less than one year are defined as • be monitored for leaks and regularly inspected temporary tanks and must: • be properly maintained • be labeled • have monitoring and inspection records on site • have a posted facility sign • assess releases during operations or at tank removal • have secondary containment and report them to the State Duty Officer at . be maintained 1-800-422-0798 Temporary tanks with a capacity of greater than 500 • label lines so connections can be identified during gallons within 500 feet of a class 2 surface water must substance transfer also meet the temporary tank requirements listed above. • have underground pipin�safeguards if utilized The MPCA will not require temporary tanks to be • be properly closed if no longer used registered, however the rule requirements still apply. • be sampled for contamination when tank is removed Compliance with other regulations More information about these requirements and their Other regulations that tank owners need to be in effective dates can be found in fact sheets listed at the compliance with include: end of this document in the"Need more informatiorr" section. General Requirements for Aboveground Storage Tanks • t-a1-02 • Apri�2004 �. � MinnesoW Pollution �'�" Ca�trol Aye�xY Page 2 � . • the federal Spill Prevention,Control and Countermeasures Plan • the Minnesota"Spill Bill" requirements • hazardous waste regulations • state and local fire code • other state and local regulations Also, petroleum products that are stored for resale in ASTs greater than 2,000 gallons must comply with the petroleum product delivery law(see Petroleum Product Delivery Law fact sheet for more information). Need more information? Visit the AST Program at www.pca.state.mn.us/cleanup/ast.html. The site has forms, fact sheets, and other information about ASTs and AST requirements. You can also call the MPCA at 651-296-6300 or 1-800-657-3864. General Requirements for Aboveground Storage Tanks • t-a1-02 • April 2004 �Fnnesow roUui�on � Control Agency Page 3 1 �..�,,,� Minnesota Pollution Aboveg ro u n d Sto rage Ta n k � Control Agency 520 Lafayette Road (AST) P ro g ra m St.Paul,MN 55155-4194 Major AST Facility Permit Application Pursuant to Minn. Stat. § 115.03, subd. (1)(e)(3)and Minn. R. ch. 7001, a permit is required for the aboveground storage of liquid substances at a major facility.A major facility is one where the total liquid storage design capacity of all tanks, including indoor tanks, is one million gallons or greater. Instructions 1. This permit application is to be used for: . proposed new major facilities • non-major facilities that intend to expand liquid substance storage to one million gallons or greater • re-permitting of existing major facilities 2. This application form should not be used for permit modification requests; a separate form is available at: http://www.pca.state.m n.us/pu blications/t-a3-26.doc. 3. For new and expanding facilities, a permit must be issued by the Minnesota Pollution Control Agency(MPCA)prior to initiating tank construction. It is recommended that this application be submitted at least 90 days prior to initiating tank construction. 4. For permitted facilities, this application must be submitted at least 90 days prior to expiration of the current permit according to Minn. R. 7001.0040, subp.3 and Minn. R. 7001.0020.H. 5. Answer all questions, except for questions limited to facility types(new,expanding, or existing)other than your own. Answer questions in the blocks provided. If more space is needed, enlarge or create additional blocks, or add information at the end of the document on additional pages. 6. Answer questions using information that is currently available.Where an answer to a question is unknown,would require further testing or assessment, indicate"Unknown". 7. Even if the information requested has been submitted to the MPCA at some other time or in some other form, please include it here in order to verify that it is up to date. One exception would be if a specific document is requested which was previously submitted; in this case, reference the name of the document and date it was submitted. 8. To add rows to the tables to accommodate more information or more tanks, click on the last box in the table and hit the Tab key or use the Table-Insert-Rows above or Rows Below function. 9. The application must be signed and certified by the appropriate authorized company representative as defined in Minn. R. 7001.0060. 10. Submit: • a signed paper copy of the completed application • all required attachments Submit to: Aboveground Storage Tank Program Attn: Beckie Olson Minnesota Pollution Control Agency 520 Lafayette Road North St. Paul, Minnesota 55155-4194 I. General This permit application is for(check one): ❑ A proposed new major facility("New") ❑ A non-major facility that intends to expand liquid storage to one million gallons or greater("Expanding") ❑ Re-permitting of an existing major facility("Existing") Company permit contact: Last name: First name: Address: City: State: Zip code: Email: Telephone Number: t-a3-25 4/4/07 Page 1 of 8 Preparer of application contact: Last name: First name: Address: City: State: Zip code: Email: Telephone Number: II. Current Permit (Existing facilities only) AST Permit number: Date of issuance or most recent modification: Expiration date: III. Tank Owner/Operator List any legal entity that is an owner or operator as defined in Minn. R. 7151.1200, subp. 24 and 26, of any tank at the facility. If there are multiple owners and/or operators,designate each as(Owner)or(Operator). Cor orate name Mailin address Re istered a ent name IV. Facility Facility name: Address: City or township: County: GPS identifier: V. Description of Business Activities Provide a brief description of the nature of the business activities at the facility and how aboveground liquid storage is used in the course of the business activities: VI. Tanks Using the tables below, provide the applicable information regarding tanks at the facility. In Part A., list all regulated AST systems at the facility. Part B requests the applicant to list certain AST's that are not regulated, for purposes of verifying their exclusion from regulation. For questions about whether or not a tank should be listed, consult an AST permit manager by calling 651-297-8305. A. Regulated Tanks List all AST systems located at the facility that are being used to store any substance as defined in Minn. R. 7001.4205, and that are not excluded AST systems under Minn. R. 7151.1300. For each tank, identify: Tank number: If the facility has a permit, use the company's numbering system from the current permit. If there is no current permit, provide a numbering system. Each tank must have a unique number. Tank numbers must be keyed to the facility layout and to the secondary containment and substance transfer sections of the application. Substance: Identify the stored liquid substance with as much specificity as possible. For petroleum products, food products, and chemicals, identify grade, type, or solutions. If the tank is used to store different substances at different times, list all. If the substance is a mixture, a solution, or has identifiable contaminants, list all components of the substance,with percentages. Capacity: Design capacity to overflow(in gallons) Year of installation • If uncertain, give estimate and identify as an estimate • If the floor of a steel field-erected tank has been replaced, give most recent year as follows: [new floor vear] Status t-a3-25 4/4/07 Page 2 of 8 A=Active(currently contains liquid substances or temporarily empty and resumption of storage is anticipated within one year or contains no liquid substances but has not been closed according to Minn. R. 7151.8200) C= Closed(currently contains no liquid substances and resumption of storage is not anticipated within one year and tank has been closed in accordance with Minn. R. 7151.8200) Tank material S= Steel single wall SS= Stainless steel single wall DW= Steel double wall F= Fiberglass P= Plastic C=Tiled concrete O=Other(describe) Fabrication type SF= Shop-fabricated FE= Field-erected Tank foundation design(One or more as applicable) S =Tank resting on native soil, gravel, or sand L=Tank resting on synthetic liner on native soil, gravel, or sand C=Tank resting on concrete slab or pad (CC=concrete is coated) R=Tank resting on concrete ringwall E =Tank is elevated on supports O=Other(describe or provide a drawing) Capacity Year Fabrication Tank# Substance igallon�_ installed Status Tank Material �e Tank Foundation Desi� Last external inspection • Field-erected tanks=give date of last external inspection per API Standard 653 or other protocol. • Shop-fabricated tanks=give date of last periodic inspection per STI SP001-00 or other protocol. . None= never externally inspected to any protocol. Lastinternalinspection • Field-erected tanks=give date of last out-of-service internal inspection. Attach copy of full API Standard 653 inspection report, or inspection report summary, using MPCA Guidelines format. If inspection protocol was other than API 653, attach a description of the protocol and results of the inspection. If inspection report or summary has previously been submitted to the MPCA, mark Report Submitted (date). • Shop-fabricated tanks=give date of last certified inspection per STI SP001-00 or other protocol. • None= never internally inspected to any protocol. Next external inspection • Field-erected tanks only: give proposed date of next e�ernal inspection. Next internal inspection • Field-erected tanks: provide proposed date of next out-of-service internal inspection and justification(ten years from date of initial service for new tanks). • Shop-fabricated tanks: provide proposed date of ne�certified inspection and justification per STI SP001-00 or other protocol. Release Prevention Barrier(RPB), if any If the tank has a RPB placed under the tank which has the function of: 1. Preventing the escape of released material, and 2. Containing or channeling released material for leak detection; identify as either: S=synthetic liners C=concrete pads CL=clay liners DB =double steel bottom DB-L=double steel bottom with synthetic liner Other: describe yours t-a3-25 4/4/07 Page 3 of 8 Internal floor coating (if any) Give year of installation Give base material(epoxy, fiberglass, etc) API 652=coating was installed according to API RP 652 TN =thin coat(less than or equal to 20 mils) TK=thick coat(greater than 20 mils) F=fiberglass reinforced Cathodic protection system for underside of tank floor(if any) Give year of installation API 651 =system is designed and operated according to API RP 651 SA=sacrificial anode system IC= impressed current system Release detection system(if any) V= periodic visual monitoring of tank for releases(identify interval) LT=periodic tank leak testing (identify methodology used and interval) Last Next Release Intemal Cathodic Release Last external internal external Next internal prevention coating or protection detection Tank# ins ection ins ection ins ection ins ection barrier liner s stem s stem Substance level gauging mechanism I FL=float gauge, local readout only FR=float gauge, local and remote readout O=other type(describe and/or provide schematic) Substance transfer—Area name or number Provide a unique name or number, keyed to the facility layout, for any area(s)where transfer vehicles(tank truck, rail car, barge, or aircraft)are stationed during transfers in and out of the tank. Substance transfer—In—Identify all methods by which substances may be transferred into the tank. T=from tank truck R=from railcar B=from barge P=by fixed piping from industrial process, from other tanks, or from outside the facility Substance transfer—Out—Identify all methods by which substances may by transferred out of the tank. T=to tank truck R=to railcar B=to barge A=to aircraft P=by fixed piping to industrial process, to other tanks, or off the facility property Substance transfer area construction C= Concrete pad A=Asphalt S= Native soil O=other type(describe) Overfill prevention system(if any) . Level 1 = High level alarm visible or audible to person controlling the fill,API RP 2350 design. Level set at no greater than 95%of capacity to overfill and no less than 30 minutes to overfill at maximum fill rate. Alarm need not be independent of gauging system. Applicability: Attended transfers of Type A and Type B substances from vehicle(truck, railcar, barge) into tank containment, and Type C1 substances • Level 2= Level 1, plus alarm is fully independent of tank gauging system. Applicability: Unattended transfers (individually initiated and terminated by personnel)of Type A and Type B substances from industrial process, from other tanks, or from off-site pipeline into tank • Level 3= Level 2 plus automatic shutoff device fully independent of tank gauging system.Applicability: Automated and/or continuous transfers(not individually initiated and terminated by personnel)of Type A substances from industrial process into tank; or unattended transfers(individually initiated and terminated by personnel)of Type A and Type B substances from industrial process, from other tanks, or from off-site pipeline into tank • None=Type C2 substances t-a3-25 4/4/07 Page 4 of 8 Substances • Type A=gasoline, aviation gas, naphtha, denatured ethanol, and hazardous materials, or mixtures or blends containing such substances • Type B=diesel, kerosene,jet fuel, crude, fuel oils#1-4,waste oii • Type C1 =fuel oil#6, low hazard chemicals, process wastewater, asphalt emulsion . Type C2=asphalt, roofing flux, vegetable oils, sugar beetjuice, paper pulp, other regulated substances Substance transfer—Other List one or both or leave blank, as applicable: • I = impermeable containment area at transfer connection point(give materials of construction and maximum spill volume contained) • RT= remote transfers may occur, during which transfers either in or out are initiated, monitored, terminated, or otherwise controlled from outside of the facility, e.g. interstate pipelines • RT-UM = remote transfers may occur when the facility is unmanned Substance Substance Substance Substance OverFill ' transfer Area transfer transfer transfer prevention Substance Tank# Gau in name or# methods—In methods—Out area construction s stem transfer—Other B. Non-Regulated Tanks List all tanks at the facility greater than 1100 gallons capacity that are not subject to regulation for one of the specific reasons given below. Tanks must meet the applicable exclusion criteria in Minn. R. ch. 7151.1300. Tanks at the facility that are not subject to regulation for other reasons, (e.g. tote tanks)need not be listed below. 1. Tank number or name Provide a unique number or name for the tank. Tank numbers or names must be keyed to the facility layout. 2. Contents Identify the contents of the tank. 3. Reason for exclusion(choose one): ❑ Indoor(per Minn. R. 7151.1300, subp. 2.C.) An indoor tank is one that is located inside of a building, resting on or elevated above an impermeable floor, from which a release in the amount of the design capacity of the tank would (Identify by letter a/b/c which of the containment methods applies to the tank.): a. be entirely contained within a tank-specific secondary containment structure; or b. would not escape from the building through doorways, floor drains, or by other means; or c. would be directed by the drainage system of the building either to a permitted on-site wastewater treatment facility, or to a permitted municipal wastewater treatment facility. ❑ Wastewater clarifiers, basins, and treatment equipment(per Minn. R. 7151.1300, subp. 2.A.) ❑ Hazardous waste(per Minn. R. 7151.1300, subp. 2.E.) ❑ Agricultural chemical(per Minn. R. 7151.1300, subp. 2.F.) ❑ Stainless steel (per Minn. R. 7151.1300, subp. 2.1.) ❑ Clean water(per Minn. R. 7151.1300, subp. 2.J.) ❑ Solid(substance is a solid at ambient temperatures and pressures) ❑ Gas(substance is a gas at ambient temperatures and pressures) Tank#or name Contents Reason for exclusion VII. Secondary Containment List all secondary containment areas for tanks listed in Part VI.A., including: Containment area number Give each area a number. This can be the same number as that of the tank in the area, or one of the tanks if there are more than one, or another numbering system may be used. Containment area number must be keyed to facility layout. t-a3-25 4/4/07 Poge 5 of 8 Tank number of each tank within area Available containment volume Calculate net available volume of containment in gallons, accounting for contour of land, slope of dike walls, piping, tanks, buildings, and other obstructions within area. A secondary containment area must be able to contain at least 100 percent of the design capacity of the largest tank in the secondary containment area plus displacement from additional tanks within the containment area, with an additional ten percent capacity where secondary containment areas are exposed to precipitation. Volume calculation method M =manual measurements S=survey showing contour and elevation Give date of most recent survey or measurement Attach calculations to the application(new facilities or after major modification) Construction materials Identify primary materials used for containment area construction. If dike walls and basin floor are different, describe each.Attach construction specifications and drawings(new facilities only). SL=synthetic liner(identify material) CB=concrete block CP=poured concrete CC=coated concrete ST=steel NS =native soil CL=engineered liner using imported clay or bentonite SA=permeabi�ity of native soil reduced by means of clay amendment G=geotextile-bentonite mat Permeability(new and expanding facilities only)(native soil,soil amendment,and clay liners only) Express permeability as hydraulic conductivity to water in cm/sec. Attach post-construction permeability test reports. Area# Tank#'s Volume Calculation method Construction Materials Permeabilit VIII. Piping Piping subject to AST major facility permitting includes any piping of two inches or greater inside diameter, located either aboveground or underground, used to convey a substance to, from, or between any regulated tank(see Minn. R. 7001.4205, 7151.1200, and 7151.1300). A. Aboveground piping For aboveground piping at the facility, describe in general terms the Iocation, fabrication (steel, plastic, other), and any release prevention, detection and containment safeguards and procedures such as visual inspection, pipe coating and wrapping, double-walled piping, and leak testing. If there is no such piping, indicate"none". B. Short-run underground piping Short-run underground piping includes dike penetrations, roadbed crossings, and other line segments that are less than 50 feet in length. For short-run underground piping at the facility, describe in general terms the location,fabrication (steel, plastic, other)and any release prevention, detection and containment safeguards and procedures such as visual inspection, pipe coating and wrapping,double-walled piping, non-corrosive materials, API Standard 570, and leak testing. If there is no such piping, indicate"none". C. Long-run underground piping Long-run underground piping includes any line segments that are 50 feet or greater in length. Identify each segment as specified below and describe any release prevention, detection and containment safeguards and procedures used for each segment, such as visual inspection, pipe coating and wrapping, double-walled piping, non-corrosive materials,API Standard 570, and leak testing. Provide a scale schematic showing the location of the endpoints A and B and identify the endpoints below. If there is no such piping, indicate"none". t-a3-25 4/4/07 Page 6 of 8 Segment name or# End oint A End oint B Inside Diameter Fabrication Substance s Existin Safe uards IX. Site Hydrogeology (New and expanding facilities only) Requested information may be found in engineering reports or site assessments. Information requested is for facility as a whole; however, if significant geological differences exist within the facility, give information as applicable to each containment area. Avera e or estimated de th to round water ft beneath tanks: Native soil classification s , between surface and roundwater: Calculated or estimated average vertical permeability to water of native soil cm/sec : Avera e or estimated de th to bedrock ft : Bedrock t e and formation name: Name of the nearest Class 2 surface water and distance to the nearest tank at the facility(surface water must be shown on location ma : Discuss any known tank-or piping-related site contamination, or an investi ation indicatin no contamination: X. Suggestions (Existing facilities only) If there is any requirement in the current permit which in the view of the applicant is unnecessary, or for which a less burdensome alternative exists which would accomplish the same goal, please identify and briefly explain. XI. Attachments Required of all applicants: 1. Facility layout(minimum scale: 1" = 100')showing the facility with the following marked: • All tanks as numbered or named in VI.A. and B. • Boundaries of all secondary containment areas as numbered in VII. • Substance transfer areas(connection point between tank and transfer vehicle)for each tank listed in VI.A., including any loading rack • Endpoints and approximate run of each long-run underground line segment listed in VIII.C. • Buildings • Roads and railroad tracks • On-site ponds 2. Location Map showing the area surrounding the facility for a distance of at least one mile in all directions(a USGS Quad map works well for this purpose), including: • Nearest Class 2 surface water • Nearest towns and cities Required for new and expanding facilities only: • Construction specifications and drawings for field-erected tanks and secondary containment areas. • Permeability test reports per MPCA testing guidelines for any native soil, engineered clay liner and soil amendment containment areas. • Survey and volume calculations for any native soil,engineered clay liner and soil amendment secondary containment areas. Submit actual drawings showing site contour and elevations. Survey may be up to three years old if no new containment areas have been constructed and no modifications made to containment areas since the survey was conducted. A survey over three years old may be submitted if a licensed surveyor has recently shot the lowest part of each dike and the highest part of the bottom of each diked area to determine if the original elevations remain accurate. • Containment area measurements and calculation of available containment volume for each area not subject to survey. t-a3-25 4/4/07 Page 7 of 8 Required for new facilities only: • Copy of any draft or final environmental impact statement or environmental assessment worksheet regarding the facility. XII. Certification Certification must be signed by an authorized company representative who is a member of company management as defined in Minn. R. 7001.0060. I hereby certify, under penalty of law, that I have personally examined and am familiar with the information submitted on this and all attached documents. I believe that the submitted information is true, accurate and complete. Signature: Date: Print name: Title: t-a3-25 4/4/07 Page 8 of 8 _ -T_ This guidance is not a regulatory document and should be considered only informational and supplementary to the MPCA permits(such as the construction storm water general permit or MS4 permit)and local regulations. 7.62 Containerized Storage: ABOVE-GROUND STORAGE TANKS GENERAL REQUIREMENTS FOR REGULATED TANKS (Minn. Rules ch. 7100) Facilities that have less than 1 million gallons in tank capacity are covered under a general permit issued on November 1, 1995. These requirements pertain to above-ground storage tanks storing liquids, such as petroleum products, used oil, chemicals, food products and pulp. A site is considered to have a liquid storage permit for its above-ground storage tanks if the following requirements are met. Tanks over 110 gallons capacity must be registered Includes: Exempt: Petroleum tanks Farm, residential, and heating oil tanks 1,100 gallons Chemical tanks and less Farm, residential and heating oil tanks over Flow-through process tanks 1,100 gallons Compressed gas tanks Agricultural chemical tanks Tanks over 1,100 gallons capacity must have secondary containment Includes: Exempt: Petroleum tanks Farm, residential and heating oil tanks 1,100 gallons Chemical tanks and less. Tanks which store a liquid which could pollute Flow-through process tanks. the waters of the state Compressed gas tanks. Food tanks(e.g., molasses, vegetable oil) Agricultural chemical tanks. March 2000 7.62-1 Chapter 7 ,,,,.,�.� Q Other Regulated Substance _ Requirements for Aboveground Minnesota Storage Tanks Poliution Control Tanks/Aboveground Storage Tanks#2.07 • April 2004 Agency boveground storage tanks(ASTs) Stainless steel ASTs storing liquids other than Stainless steel ASTs(for example,milk petroleum, hazardous substances, or tanks)containing other regulated asphalt cement are considered other substances are excluded from Minn. R. ch. regulated substance ASTs if the product 7151. has the potential to pollute the waters of the state. Examples include food-based Labeling products for human or animal consumption. ASTs containing other regulated substances must be clearly labeled Other regulated substance ASTs must be in �ndicating the type of substance stored and compliance with specific tank requirements the tank's capacity. If there is more than outlined in Minn. R. ch. 715 L If site one tank, each tank must be labeled with a capacity for ASTs is greater than one unique tank number. million gallons,this rule does not apply and the owner or operator must apply for a Tank piping used for loading or unloading permit from Minnesota Pollution Control must be labeled so that the person Agency (MPCA). performing the product transfer can identify which tank line is connected to Registration which tank. The MPCA does not require the If a person is not on site 24 hours a day, a registration of other regulated substance sign must be posted with the name, ASTs.Petroleum and hazardous substance address, and telephone number of the ASTs must be registered(Minn. Stat. § facility owner or operator, ar a local 116.46, subd. 6). emergency response contact. The sign must be posted so that it can be seen outside any containment area. Exemptions • corrosion protection and corrosion Secondary containment protection monitoring Other regulated substance ASTs need 100 • substance transfer areas percent containment area volume of the • overfill protection largest tank in the containment area. An additional 10 percent capacity is required • leak detection for ASTs exposed to precipitation. • internal inspections for field-erected ASTs • soil or ground water sampling during removal for possible contamination t-a2-07 Minnesota Pollution Control Agency • 520 Lafayette Rd. N., St. Paul, MN 55155-4194 • www.pca.state.mn.us 651-296-6300 • 800-657-3864 • TTY 651-282-5332 or 800-657-3864 • Available in alternative formats T ASTs installed on or after November 2, 1998, need Annual equipment checks to maintain leak detection or secondary containment constructed of: monitoring and warning equipment must be done. This includes function and calibration checks in accordance • compacted clay(12 inches thick with a permeability with manufacturer's guidance. of 1 x 10-�cm./sec. and has a cover material to prevent drying and erosion)that is designed and American Petroleum Institute(API)external inspections certified by a registered professional engineer of field-erected ASTs were required by November 2, 2003, or five years after the initial construction date, • concrete whichever is later. • a synthetic membrane Maintenance • a geosynthetic clay liner • the outer shell of a double-walled tank Owners and operators must minimize rust on the tank exterior and must dispose of water drawn from the • the lower bottom of a double-bottomed tank bottom of the tank in accordance with any state and federal regulations. • fabricated steel • fiberglass The secondary containment area must be kept free of cracks, open seams, open drains, siphons, and vegetation Tanks installed prior to November 2, 1998, were other than grass. Grass is used to reduce erosion. required to have a dike(could be made of soil) preventing release to surface water by'November 1, Precipitation must be removed as often as possible to 1998. By November 1, 2003,the containment area had maintain proper containment area volume. If to meet a minimum permeability standard based upon precipitation exists in the containment area,the tank the product type being stored, distance from surface volume must be reduced to maintain the 100 percent water, and depth to groundwater. For questions about capacity of the largest tank in the containment area. these requirements, see the"Permeability Testing Guidance for Secondary Containment Areas"fact sheet. Stormwater that collects in the containment area must be discharged according to state and federal regulations. Monitoring Safeguard systems must be installed and maintained For other regulated substance ASTs, someone must be according to the manufacturer's schedules and standards. present to visually monitor loading and unloading of product and be able to shut off product transfer before an Record keeping overfill occurs. For the life of the tank A visual inspection for tank releases must be conducted Owners or operators of other regulated substance ASTs at least every 72 hours if the containment area does not must keep for the life of the tank all tank system design meet the standards for tanks installed on or after records including maintenance and repair November 2, 1998. If the containment area meets the documentation,third-party certifications, and as-built standards for ASTs installed after this date,the drawings. inspection must be conducted at least weekly. All containment area evaluations for soil permeability if the tank is double-walled,the inspection must be must be kept for the life of the tank. These evaluations conducted at least monthly. should include soil classification, soil description, sample logs,tables for individual permeability tests, and On a monthly basis, a visual inspection for both new and the hydraulic conductivity of the soil. existing tanks is required. This inspection must include a walk through of the site to identify cracks in the Records for external inspections of field-erected tanks secondary containment area. Visual examination of the must be retained for the life of the tank system. exterior surfaces of tanks, piping, valves, pumps, and other equipment for cracks, corrosion,releases, and maintenance deficiencies must also be conducted. The monthly inspection must also identify poor maintenance, operating practices, or malfunctioning equipment. Other Regulated Substance Requirements for MfnnesoW Pollution Aboveground Storage Tank • t-a2-07 • Aprtl 2004 CO�ro1��y Page 2 � , � For three years Other regulated substance ASTs All service check and equipment calibration records considered temporary must be kept for three years. All periodic monitoring Other regulated substance ASTs that are on site between (72-hour, weekly and monthly)records must be kept for 30 days and a year are considered temporary tanks and three years. Documentation for monitoring must include must meet the temporary tank requirements. These ASTs the name of the person conducting the monitoring,the must be labeled"Temporary Storage"and show the date method used,the date of the monitoring, and the the storage began. monitoring results.The owner or operator must keep records indicating that the AST was taken out of service If a person is not on site 24 hours a day,a sign must be in compliance with regulations. These records must be posted with the name,address, and telephone number of kept for three years. the facility owner or operator, or a local emergency response contact. The sign must be posted so that it can Discharges to a secondary containment be seen outside any containment area. area Finally,the secondary containment area must be An owner or operator of another regulated substance constructed and maintained according to the standards AST must immediately investigate a suspected release to for ASTs installed before November 2, 1998. a secondary containment area. Moving other regulated substance ASTs The owner or operator must assess the secondary If another regulated substance AST is moved from one containment area for damage where product release site to another, the tank must be determined to be sound occurred and make any necessary repairs. by conducting one of the following leak tests before it is The owner or operator must notify the Minnesota Duty put back into use. Officer immediately of discharges to the secondary . tracer gas test containment area or of other releases. They can be reached at 800-422-0798 or 651-649-5451. • vacuum test • air pressure test Out-of-service requirements . hydrostatic test When another regulated substance AST is no longer If the other regulated substance AST is moved within the used, it must be taken out of service or removed. same site and put back into use, it must be determined to To take the tank system out of service,the tank owner or be sound through a thorough internal and external operator must: cleaning,degassing, and inspection. You can also conduct one of the leak tests above to determine the • Remove all substances from the AST, connected integrity of the tank. piping, and appurtenances. • Secure the AST to prevent unauthorized entrance or AST design standards tampering. An underground storage tank cannot be used as an AST. • Thoroughly clean the interior of the tank and piping Also,AST providers must comply with industry tank of all sludge, solids, and residuals. and piping design and construction standards. • Dispose of tank bottom sludge according to Need more information? applicable state and federal regulations. Visit the AST Program at • Render the tank free of vapors. http://www.pca.state.mn.us/cleanup/ast.html. The site • Label the tank exterior"Out of Service,"and the has forms, fact sheets, and other information about date the tank was removed from service. ASTs and AST requirements. You can also call the MPCA at 651-296-6300 or 1-800-657-3864. Other Regulated Substance Requirements for Mtnnesoca vollut�or� Aboveground Storage Tank • t-a2-07 • April 2004 �- tontrolA9e�cy Page 3 R Secondary Containment for Aboveground Storage Tanks Minnesota Pollution COIIt�OI Tanks/Aboveground Storage Tanks#4.01 • December 2008 Agency econdary containment helps prevent Materials serious environmental problems The acceptable impermeable materials that from occurring because of tank must be used for construction of the releases. While the tank itself is vital to containment area for ASTs installed on minimize the potential for leaks, secondary November 2, 1998, or later include: containment is another important safeguard from potential releases. This fact sheet • compacted clay (if clay is used,it must outlines the requirements and choices have a minimum of 12 inches available for secondary containment for compacted clay, be protected with aboveground storage tanks(ASTs) cover material to prevent drying and according to Minn. R. ch. 7151. erosion, be designed, inspected, and certified by a registered professional engineer, and be tested after Compatibllity installation to meet a permeability rate If more than one type of substance is stored to water equal to or less than 1 x 10-' within a single containment area,the cm/sec) substances must be compatible with each . a geosynthetic clay liner other and the containment material. • concrete VOlume • a synthetic membrane For containment areas which are exposed • the outer layer of a double-walled tank to precipitation,the containment area . fabricated steel capacity (available space)must be at least 110 percent of the size of the largest tank • fiberglass in the containment area. Containment areas with tanks that were For containment areas which are not �nstalled before November 2, 1998, may be exposed to precipitation,the containment constructed using any of the impermeable area capacity must be at least 100 percent materials listed above, or may be of the size of the largest tank in the constructed of native or amended soils that containment area. have been tested to meet the following minimum permeability rates for the A separate containment area is not required applicable substance type and hydrology. for double-walled tanks. Soil testing requirements are explained in the fact sheet"Permeability Testing for Secondary Containment Areas." t-a4-01 Minnesota Pollution Control Agency • 520 Lafayette Rd. N., St. Paul, MN 55155-4194 • www.pca.state.mn.us 651-296-6300 • 800-657-3864 • TTY 651-282-5332 or 800-657-3864 • Available in alternative formats � Permeability rates to water for secondary containment areas made of native or amended soils re-November 2, 2008,tanks onl Substance Classification If ground water or bedrock is If ground water or bedrock is < 10 feet from grade or AST is within > 10 feet from grade or AST is within 100 feet of Class 2 water 100 feet of Class 2 water Type A Minimum of three feet of soil at Minimum of three feet of soil at 1 x 10-5 cm/sec 1 x 10�cm/sec Type B I Minimum of three feet of soil at Minimum of three feet of soil at ' 1 x 10�cm/sec 1 x 10-3 cm/sec Type C I Minimum of three feet of soil at No minimum permeability standard 1 x 10-3 cm/sec Type A substances include gasoline, aviation gas, Temp01'aly ta11kS naphtha, denatured ethanol,hazardous materials, and mixtures or blends of these with Types B and C Temporary tanks are ASTs located at a facility for more substances. (Antifreeze is considered a Type A than 30 days, but less than one year. Secondary substance.) containment areas for temporary tanks must meet the volume requirements described above, and be Type B substances include crude oil, diesel, kerosene,jet constructed either of the impermeable materials listed fuel, fuel oil types one through four, waste oils, and above or meet the applicable permeabiliry rate from the mixtures or blends of these with Type C substances. table above. (Virgin lube oil is considered a Type B substance.) Drainage Type C substances include asphalt cement, roofing flux, precipitation that collects within the secondary fuel oil types 5 and 6, and other regulated substances containment area must be discharged in compliance with which are not petroleum-based and not hazardous all state and federal regulations materials. Release detection design Containment evaluation For ASTs installed on November 2, 1998, or later, and Owners and operators of tanks must retain, for the life of for ASTs installed before that date which are lifted or the tank system,the following written records of moved after that date, the area of secondary containment sampling and testing used to evaluate permeability of which is directly under the tank must be designed to soil containment areas: allow for visual detection of a release of a substance . classification of soils used in containment area through the tank floor. construction Release detection designs that can be used include: • soil descriptions and logs of each sample location • tank is elevated • a table of individual permeability tests • continuous concrete slab under the tank( in the case • Permeability of the soil expressed as cm/sec for each of a Type A substance, slab must be treated with sample location and for each containment area material that is impermeable to the substance) • fiberglass or steel pad under the tank Need more information? • synthetic membrane under the tank Visit the AST Program at www.pca.state.mn.us/cleanup/ast.html. The site has • double-walled tank(shop fabricated) forms, fact sheets, and other information about ASTs • double bottom tank(field erected) and AST requirements. You can also call the MPCA at 651-296-6300 or 1-800-657-3864. Secondary Containment for Aboveground Storage Tanks • t-a4-01 • December 2008 � MEn+tiesaw Po��uiton �.— Controlllger►cy Page 2