STI-P3^®
Phone: (262) 534-3130 Fax: (262) 534-4748 e-mail: sales@ipstanks.com

Protect The Environment, Protect Yourself

The Steel Tank Institute remains at the forefront in underground tank design with the STI-P3^® Dual Wall Steel Underground Storage Tank. The Dual Wall Tank doesn't just meet federal, state, and local requirements; it surpasses them.
Federal law requires that all underground tanks be structurally sound, corrosion resistant, and product compatible. Some state and local governments are beginning to require secondary containment. Fines for noncompliance are stiff; the liability for a tank leak can be sky-high. By specifying the STI-P3^® Dual Wall Tank, you'll take a giant step beyond regulations.

High structural strength
     The STI-P3^® tank's steel construction ensures a rugged and durable structure.
     Steel STI-P3^® tanks have inherent strength and resilience.

Three-way corrosion protection
     The STI-P3^® system provides a multi-level approach to assure complete external corrosion resistance.

The three-way system includes:

Protective Coating: A tough, heavy-duty dielectric coating covers the tank and seals it from the surrounding soil. It provides the first line of defense against stray current and galvanic corrosion.

UL-Listed Dielectric Bushings: Nylon bushings in all openings electrically isolate the tank from piping. They prevent the entry of stray currents or galvanic action through piping connections.

Cathodic Protection: Galvanic anodes provide protective current flow to any scratches in the coating that my occur during shipping/handling. The anodes are self-regulating, supplying current only as needed, for extra long life. Every P3 tank is shipped with a factory installed PP2 Protection Prover cathodic protection monitoring system.

Fuel/chemical compatibility
     The STI-P3^® steel tank is compatible with all current fuels, including alcohol blend gasolines. It's also compatible with anticipated fuels and nearly all commonly stored chemicals.

Dual-wall containment
     The UL-listed STI-P3^® Dual Wall Tank provides a rugged steel wrap for secondary containment. The double-wall steel construction is more secure than vaults or liners. It's also simpler and stronger than other double-wall tanks; no special internal ribbing is required for outer wall support.
     The Dual Wall Tank's outer steel wrap surrounds the inner UL-58 tank, creating an interstitial space between wrap and tank. P3^® tanks are manufactured to both U.L. Type 1 and Type II standards according to local codes or requirements. Any potential leak that may occur will be captured in this sealed space, preventing a release to the environment. And with the tank's leak monitoring provision, a warning will be provided.

Store Liquids Safely

Easy monitoring
The tank includes an integral leak monitoring well which is connected to the tank's interstitial space. The monitoring well enables quick and easy leak detection by any of a variety of methods: electronic, mechanical, pressure, vacuum, hydrostatic, or manual (dipstick). Automatic monitoring methods provide immediate warning to appropriate personnel.
Recommended monitoring depends on the particular application.

Variety of sizes
The STI-P3^® Dual Wall Tank is available in a wide range of sizes. Standard capacities range from 300 to 50,000 gallons. Custom sizes are also available.

STI-86: Containment of Pipe & Fitting Leaks

Studies show that about 70% of underground leaks are due to leaking piping or fittings rather than the tank itself. Since the STI-P3^® system has effectively solved the tank leak problem, the Steel Tank Institute has channeled its engineering expertise into solving the piping and fitting leak problem. The result is the state-of-the-art STI-86 piping containment and access system.

Leakproof containment
STI-86 is a design standard developed to trap piping leaks at the tank and prevent environmental damage. The system places all tank access points-- fittings, connections, etc. -- within a leakproof chamber atop the tank. So pipe joints, which are the most likely to leak, are fully contained and removed from contact with the soil.
Filling spills, another troublesome source of groundwater contamination, will be captured as well.

Easy access
Since all connections are located in a single area, STI-86 provides easy access to piping, fittings, pump, and gauges. It also enables simple and quick visual inspection whenever the tank is to be filled.

Isolated and protected
All openings are through the tank's manway cover which is electrically isolated from the tank. The containment chamber is coated in the same manner as the tank and is electrically isolated.
All piping exiting the chamber is likewise isolated.

Overfills eliminated
An optional fill limiting valve prevents overfilling the tank, to stop spills and product loss.

Fits a variety of needs
The STI-86 system will accommodate all existing pumps and piping. Whatever your application needs, your equipment will fit.

Highest Quality Assured

All STI-P3^® tanks are fabricated following rigorous quality control procedures. To ensure conformance to standards, tanks must undergo three levels of quality inspection: the manufacturer's own inspection; regular inspections by a national testing organization; and unannounced Steel Tank Institute inspections.

Thorough testing
     Tanks go through a batter of tests and checks. The protective coating must pass tests for aboveground weathering, product compatibility, cathodic disbondment, underground weathering, coating adherence, and dielectric properties. The coating is also wet-film and dry-film tested to check for appropriate thickness.
     Anodes must be of the proper material and purity, properly sized and located, and securely attached to the tank. Isolation bushings must be dielectric and UL approved.
     Both the inner tank and outer wrap must be pressure tested and checked with leak detecting solution.

30-year warranty
Because of careful engineering and strict manufacturing standards, STI-P3^® tanks offer warranty protection that is unsurpassed in the industry --a 30-year limited warranty against structural, corrosive, or incompatibility failure. And the Steel Tank Institute itself backs each tank.
Only the best manufacturers are licensed to build STI-P3^® tanks, so you get only the best in underground storage.

Specifications

The following specification chart is provided as a reference for typical STI-P3^® Dual Wall Tanks. Slight variances may occur depending upon the manufacturer and the application. Consult your local STI-P3^® licensed manufacturer before specifying.

Capacity (Gallons)	Tank Diameter	Tank Length	Overall Length	Wall Thickness (Nominal)	Weight (Pounds)
300	3' 2"	5' 0"	5' 10"	.290"	890
550	4' 0"	6' 0"	6' 10"	.313"	1,120
1,000	5' 4"	6' 0"	6' 10"	.290"	1,650
1,500	5' 4"	9' 0"	9' 10"	.313"	2,540
2,000	5' 4"	12' 0"	12' 10"	.313"	3,120
2,500	5' 4"	15' 0"	15' 10"	.313"	3,820
3,000	5' 4"	18' 0"	18' 10"	.313"	4,400
4,000	5' 4"	24' 0"	24' 10"	.313"	5,680
4,000	7' 0"	14' 0"	14' 10"	.313"	4,910
4,000	8' 0"	10' 8"	12' 6"	.384"	5,840
5,000	8' 0"	13' 4"	14' 2"	.384"	6,920
6,000	6' 0"	28' 5"	29' 3"	.384"	8,000
6,000	8' 0"	16' 0"	16' 10"	.384"	9,600
8,000	8' 0"	21' 4"	22' 2"	.384"	10,120
10,000	8' 0"	27' 0"	27' 10"	.384"	12,220
10,000	10' 6"	15' 6"	16' 4"	.429"	12,200
12,000	8' 0"	32' 0"	32' 10"	.429"	16,000
12,000	10' 6"	18' 6"	19' 4"	.429"	13,900
15,000	8' 0"	40' 0"	40' 10"	.492"	22,400
15,000	10' 6"	23' 4"	24' 2"	.492"	19,120
20,000	10' 6"	31' 0"	31' 10"	.492"	24,200
25,000	10' 6"	38' 9"	39' 7"	.554"	33,300
25,000	12' 0"	30' 0"	30' 10"	.625"	34,700
30,000	10' 6"	46' 6"	47' 4"	.554"	39,000
30,000	12' 0"	36' 0"	37' 10"	.625"	40,800