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A.3 - STEP BY STEP BASE OVERVIEW Fig. A.4 Determine overall Tank Sump height based on the plans for grade level. You will then perform the following actions in order: NOTE: All steps to Abrade are inside and outside the Sump 1) Cut the minimum 2" from bottom of the Base 2)Abrade 4" up from bottom of Base, dust off, keep clean 3)Abrade 4" down from top of Tank Collar, dust off, keep clean 4) Carefully join the Base to Collar, Tape joint inside & out 5) Mix Paste with Catalyst and apply OVER the taped joint to smooth out wall transition in case of difference in Diameter 6) Fiberglass the base to the Tank Collar, Let Cure 7)Test the interstice: Pressure & Soap the Fiberglass job 8) Install your penetration fittings, Let Cure 9) Test the interstice: Pressure & Soap the Fitting areas Fig A.5 10) Cut the minimum 2" from the top of the Base 11)Abrade 4" down from top of Base, dust off, keep clean 12) Cut the bottom of the Body to attain the necessary overall height required to reach Grade specifications 13)Abrade 4" up from bottom of Body, dust off, keep clean 14) Carefully join the Body to Base, Tape joint inside & out 15) Mix Paste with Catalyst and apply OVER the taped joint to smooth out wall transition in case of difference in Diameter 16) Fiberglass the Body to the Base and let cure Fig. A.6 17) lightly sand, and flow-coat the joint, inside & outside, let cure 18) Test the interstice: Pressure & Soap the Fiberglass job 19) Field Air Integrity Test: 4 PSI on interstice and wait one hour before beginning test. Mark time, monitor for one hour 20) Hydrostatic Filling and Advanced Leak Detection Procedure 21) Hydrostatic Field Integrity Test: Mark liquid level and monitor one hour 22) Protect Tank Sump Reducer and Backfill A.4 - Trim the Bottom of piping sump BASE 2" from BOTTOM EDGE only using a carbide tipped blade or masonry saw. Material must be cut square with a 1/4" +/- tolerance to open the double wall space 3600 around sump. (Fig. A.4) A.5 - Abrade with air-driven sander (Fig. A.5) 4 inches up from the cut - Inside and Outside - until fiberglass surface can be seen clearly. Dust off with shop brush and keep clean. A.6 - Abrade with air-driven sander (Fig. A.5) 4 inches down from top edge of Tank Collar - Inside and Outside - until fiberglass surface can be seen clearly. (Fig. A.6) Dust off with shop brush and keep clean. 6 ii-B401-DW-SP-10A