Section 03936 WATER LEAKAGE TEST FOR CONCRETE STRUCTURES

Section 03936

WATER LEAKAGE TEST FOR CONCRETE STRUCTURES

PART 1 - GENERAL

1.1 THE REQUIREMENT

A. The CONTRACTOR shall furnish labor, tools and equipment to perform specified leakage tests for concrete water holding structures.

1.2 SUBMITTALS

A. Shop Drawings: Leak repair methods by epoxy injection or surface treatment.

_{PART 2 - PRODUCTS (NOT USED)}

PART 3 - EXECUTION

3.1 WATER LEAKAGE TEST

A. Test the Following Concrete Water Holding Structures for Leakage:

1. Solids storage bins.

B. Before Testing Water Holding Structures for Leakage:

1. Backfill excavations to top of structure foundations.

2. Cure concrete and obtain specified concrete compressive strength.

3. Do not apply brick facing or other materials that will cover concrete surfaces until after testing water holding structures for leakage.

C. Isolate sections of water holding structures that can be isolated in actual operation. Test sections separately for leakage.

D. Close valves and gates to structures.

E. Fill water holding structures with water to maximum liquid level indicated on the

Drawings.

F. Make other equipment such as stop gates, sluice gates, valves, and temporary bulkheads watertight, or measure leakage through other equipment by methods acceptable to ENGINEER. Do not base leakage upon manufacturer's estimates

G. Determine evaporation by floating evaporation pans in structures during testing.

H. Examine concrete surfaces for leaks and damp spots during first 24 hours after filling structures.

I. When Leaks or Damp Spots Appear on Exposed Surfaces:

_{1. Mark visible leaks and damp spots.}

Sludge Dewatering and Odor Control at Plant 1 WATER LEAKAGE TEST

2. Drain structures of water after minimum 24 hours of being full.

3. Repair defects causing leaks and damp spots in accordance with accepted leak repair submittal on both interior and exterior of structures.

4. Refill water holding structures.

5. Repeat testing and repair process until no leaks or damp spots appear.

J. When no leaks or damp spots appear after 24 hours of being full, measure change in water volume during the next 24 hours.

K. When water volume loss exceeds 0.10 percent of water volume originally held with allowance for equipment leakage, evaporation, and precipitation:

1. Determine cause of volume loss.

2. Drain structures of water.

3. Repair defects causing loss of water volume.

4. Refill water holding structures.

5. Repeat testing and repair process until volume loss does not exceed 0.10 percent of water volume originally held in 24 hours.