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Inspection Procedure Checklist And Ins FLUID p CONTAINMENT For Fiberglass Underground Tank Installation *This checklist must be completed in its entirety by the installing contractor to validate the remainder of the tank warranty. For warranty details, see Publications "Single -Wall Fiberglass Tanks for Underground Petroleum Storage," Pub. No. 6312 and "Double -Wall Fiberglass Tanks for Underground Petroleum Storage," Pub. No. 16207. Job Name Job Site Address Owner Installation Contractor Address Date Citv State Foreman Owner Representative Title Installation Checklist Contractor Owner's Please initial each item as it is completed. If not applicable, please mark N/A. Foreman Representative A. Handling and Testing ❑ Single-wall tanks tested at 5 psi for 4', 6', 8' and 10' diameter tanks; 3 psi for 12' diameter tanks. Soapy water solution applied and the entire tank surface carefully inspected for air bubbles. ❑ Double -Wall tanks tested in strict conformance with "Test Instructions" label on tank (Label No. L20020). Do not connect the air hose directly to fitting in annular space. ❑ Hydrostatic test of secondary containment collar complete (fill collar with water, hold 12 hours, and check for leaks). B. Bed & Backfill Material Meets all ASTM C-33 requirements for quality and soundness. No more than 5% of backfill materials passes through a #8 sieve. Attach a copy of the backfill supplier sieve analysis. Supplier Type (In accordance with installation specifications.) ❑ Pea Gravel -- Clean naturally rounded aggregate, with particle size not less than 1/8" or more than 3/4" in diameter. ❑ Crushed Stone or Crushed Gravel -- Washed crushed stone or gravel with angular particle size not less than 1/8" or more than 1/2" in diameter. ❑ Attach sieve analysis from a qualified soil engineer or from the supplier. C. Hole Size ❑ Stable walls -- 4', 6', 8' and 10' diameter tanks -- 18" minimum (24" preferred) between adjacent tanks and between tanks and hole walls. ❑ Stable walls -- 12' diameter tanks -- 24" minimum between tanks and hole walls and 24" between adjacent tanks. ❑ Unstable walls - '/2 tank diameter minimum between tanks and hole walls; 18" (24" preferred) minimum between adjacent tanks. (24" for 12' diameter tanks). D. Anchoring ❑ Hole flooding from high water table anticipated. ❑ Hole flooding from external surface water anticipated. ❑ Completed in accordance with Installation Instructions Slab Deadman ❑ Owner's representative aware of anchoring requirements. ❑ Not required. E. Installation Procedures 1 . Minimum 12" level backfill bed of approved material. 2. Initial backfill -- 1st two 12" lifts pushed completely under tank bottoms between ribs and under end caps to eliminate all voids. 3. Completed backfilling to tops of tanks in uniform lifts. 4. Tanks not filled with backfill to the tops of the tanks. Exceptions: wet holes. See Fluid Containment Pub. No. 6304. 5. Tanks completely filled with water or product after backfill is to the top of tanks. 6. Depth of bury/slab for traffic loads. 4'-10' diameter tanks: 36" of backfill, or 30" of backfill plus 6" of asphalt, or 18" of backfill plus 6" of reinforced concrete. 12' diameter tanks: 38" of backfill plus 6" of asphalt or 38" of backfill plus 6" of reinforced concrete. 7. Filter fabric hole liner is recommended, for the following installations: a. Tidal condition or frequently changing water table. b. Unstable soils (muck or landfill). c. Water condition with silty soil. See installation instructions Pub. No. 6304 for recommended brand name filter fabrics. 8. Reference Fluid Containment Pub. No. 6304 for complete installation instructions.