COMPLIANCE INFO_1995-2011 - Laserfiche WebLink

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• Inner Wall Test • Release pressure from primary tank. • Remove primary tank fitting plug. • Look inside for any accumulation of monitoring tracer fluid. Important: If a colored fluid is found during any test, discontinue the installation and immediately contact Owens-Corning Field Service. Phone numbers are listed on page 2. • Replace and tighten fitting plug. A4. Hole Size A 18" Minimum' 24" Preferred '24" Required on 12'Tanks Stable Excavations • 4' through 10' diameter tanks require: ❑ Minimum of 18" (24" preferred) between adjacent tanks. ❑ Minimum of 18" (24" preferred) between tank sides and ends and the banks of the excavation. • 12' diameter tanks require: ❑ 24" between adjacent tanks. ❑ 24" between tanks sides and ends, and the banks of the excavation. Important: If tanks are mechanically anchored, additional clearance is required between tanks. (See section A7) .� �• ,� VA / Mid ,- :. �W — *24; Required on 2'Tanks 1/2 Tank Dia. 1/2 Tank Dia. 1/2 Tank Dia. M00 Unstable Excavations (all size tanks) • Muck, bog, peat, swamp or landfill type areas where the soil is soft or in areas with expansive clay soils. • Have less than 750 lbs./sq. ft. cohesion per ASTM D 2166*. • Have ultimate bearing capacity of less than 3500 lbs./ sq. ft. ❑ Minimum 18" (24" preferred) between adjacent tanks. ❑ Excavation must allow a minimum of 1/2 the tank diameter from ends and sides of tanks to excavation walls. *Test Methods for Unconfined Compressive Strength of Cohesive Soil. • May require a reinforced concrete pad under tank. • Contact soils consultant for recommendations. • Filter fabric hole liner is recommended for soils (See section A6 for list and further requirements): ❑ With less than 2501bs./sq. ft. cohesion ❑ With ultimate bearing capacity of less than 500 lbs./sq. ft. A5. Burial Depth and Cover Excavation Depth • All tank holes must be deep enough to: ❑ Allow a minimum of 12" and a maximum of 24" required backfill bed over the hole bottom or concrete pad. • If the total burial depth from tank top to grade is greater than 60% of the tank diameter, anchoring the tank may not be required (see section A7). Pad Dimension • Paving must extend at least 12" beyond tank perimeter in all directions. Maximum Burial Depth • UL Requirements specify that the depth of cover must not exceed 7'. ❑ For all size tanks. ❑ For both traffic and no traffic conditions. • For deeper burial depths, contact your Fiberglas Tank Installation Manager. Minimum Burial Depth No Traffic Load (4' thru 10' diameter tanks) • Tanks need a minimum cover of 24" backfill or • 12" of backfill plus 4" reinforced concrete.* • Consult local codes for minimum allowable burial depth. *When mechanical anchoring is required, 6', 8' and 10' diameter tanks must be buried a minimum of 36". (12' diameter tanks) • Tanks need a minimum cover of 42" backfill or • 38" backfill plus 4" reinforced concrete. Continued on next page.