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PGSF WMVD Storm and Combined Sewer - Construction Package 2 Cast-in-Place Concrete <br />Project No. 180162 03 30 00 - 27 <br /> <br />4. Testing includes visual inspection of the dry sides of all walls, wall base construction <br />joint at top of the slab, and the soffit of elevated slabs for evidence of leakage. Damp <br />spots, leakage, or seepage revealed by the test, including those caused by shrinkage <br />of concrete, honeycombed areas, construction joints, or other sources shall be <br />repaired by Repair Method 1 (see Repair Methods paragraph in the Repair of <br />Damaged Concrete and Cracking article above). <br />5. Damp spots are defined as areas from which water that can be picked up on dry <br />hand and smeared across the dry concrete surface. <br />6. Re-test tanks or channels which have been repaired to check the suitability of <br />repairs. <br />7. Provide water required for testing and re-testing and dispose of in an approved <br />manner. <br />8. After repair of visual leakage, liquid containing or conveying concrete structures <br />supported on soil must also meet maximum leakage criteria into the soil through <br />their base slab or mat foundation as follows: <br /> <br />Structure Type Tightness Criterion <br />Containment structures fully lined prior to hydrostatic test No measurable loss <br />Rectangular basins and tanks 0.050 percent per day <br />Note: All damp spots and/or leakage through walls, wall-to-slab joints, and elevated slabs shall first be <br />repaired as described above. <br /> <br />9. Record volume loss by measuring the vertical distance from the water surface to a <br />fixed point on the tank above the water surface. Account for evaporation from open <br />surfaces. <br />10. If the drop in water surface during the test period exceeds the values given in the <br />table above, exclusive of evaporation, the leakage is considered excessive and shall <br />be remedied. The test period shall be per ACI 350.1. <br />3.17 CLEANUP <br />A. Upon completion of the work and prior to final inspection, clean all concrete surfaces as <br />follows: Sweep with a broom to remove loose dirt, then mop and/or flush with clean <br />water. Scrub by hand or machine as required to remove and blend stains or discolored <br />areas . <br />B. Clean floors that have curing and sealing compound as stated above, followed by the <br />final application of curing and sealing compound. <br />END OF SECTION