02111_SEPTICTANKCLOSURE.doc

USDA Forest Service Prescott National Forest Project Specifications Mingus Work Center and Fire Center Rappel Tower Demolition

SECTION 02111

SEPTIC TANK CLOSURE

PART 1 – GENERAL

1.1 sUMMARY

A. Includes removal, disposal, and backfilling of existing or abandoned septic tank, and utilities to the extent shown on the drawings. Refer to ADEQ A.R.S. R18-9-A309(D) for closure requirements. The internet link to the regulations is referenced in the STATEMENT OF WORK.

PART 2 – PRODUCTS

NOT APPLICABLE

PART 3 – EXECUTION

1.2 GENERAL

A. Topsoil stripping and storage, if required, shall comply with the applicable specification.

B. The abandoned septic tank shall be pumped prior to closure. Pumped liquid waste and septic tanks, or parts of them, shall be disposed of the same day as pumped or removed in accordance with location health requirements.

C. Backfill for removed items may be excess material from other excavation or borrow from an approved source.

1. Backfill shall be brought up in 12-inch compacted layers.

2. Compaction shall be by mechanical tampers, with at least three passes over the entire surface.

3. Maximum size of rock in backfill shall be 8 inches.

4. Backfill shall be compacted and rounded 6 inches above the natural ground.

D. When topsoil replacement is required, backfill and compaction shall comply with SECTION 02300, except the backfill shall terminate 6 inches below the natural ground. Placement of topsoil, when required, shall comply with the applicable specifications.

E. Excessive settlement or other evidence of improper backfill shall be corrected by reopening the excavation to the depth required for proper refilling and compaction.

END OF SECTION 02111

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