B01 Attachment 3 Technical Specifications.pdf

INDIAN HEALTH SERVICE

WESTERN OREGON DISTRICT OFFICE

BID DOCUMENTS AND SPECIFICATIONS

MARCH 2021

FOR

Individual On-site Septic System for Keith Moody

Warm Springs Tribe

Warm Springs Reservation

IHS Project No. PO-20-C72H

Measurement and Payment Mr. Keith Moody 7804 Hwy 9 Warm Springs, OR

MEASUREMENT AND PAYMENT

1. MOBILIZATION & DEMOBILIZATION

Payment for transportation of equipment, material, and personnel to and from the job site location (regardless of trips required), required permits for water and sewer, and all other necessary items to complete the work.

Mobilization & demobilization 1 LS $

2. SEPTIC TANK RISER (TWO RISER LIDS TO GRADE)

Payment for septic tank risers to be installed on existing septic tanks shall be made at the contract unit price based on the number of septic tank risers installed. Compensation shall include payment for riser material, locking cover, risers to grade, and all other necessary items for a complete and operational installation.

Two Riser Lids to Grade 1 LS $

3. 4” SOLID SEWER PIPE

Payment for 4” solid sewer pipe shall be made at the contract unit price per linear feet of 4” solid sewer pipe installed. Compensation shall include payment for the excavation, backfilling and compaction; all pipe and fittings; connection of the solid sewer pipe to the existing sewer line;

testing; and all other necessary items for a complete and operational installation.

4” Solid sewer pipe 155 LF $

4. EFFLUENT FILTER

Payment for effluent filter shall be made at the contract unit price for the sizes listed based on the number of septic tanks installed. Compensation shall include payment for excavation, backfilling and compaction; septic tank, baffles, access risers, effluent filter, inspection ports as required, and all other necessary items for a complete and operational installation.

Effluent filter 1 LS $

5. EXTRA DRAINROCK GRAVEL DRAINFIELD

Payment for conventional drainfield as specified in the detailed drawing, shall be made at the contract unit price based on the number of linear feet installed. Compensation shall include payment for, excavation, backfilling and compaction; clean drainfield gravel, drainfield filter fabric, laterals, and all other necessary items for a complete and operational installation.

Gravel Drainfield 500 LF $

Measurement and Payment Mr. Keith Moody 7804 Hwy 9 Warm Springs, OR

6. DISTRIBUTION BOX WITH RISER LID TO GRADE

Payment for distribution boxes to be installed shall be made at the contract unit price based on the number of distribution boxes installed. Compensation shall include payment for distribution box material, locking cover, and all other necessary items for a complete and operational installation.

Distribution boxes 1 EA $

7. INSPECTION PORT

Payment for inspection ports to be installed shall be made at the contract unit price based on the number of inspection ports installed. Compensation shall include payment for inspection port material, and all other necessary items for a complete and operational installation.

Inspection port 5 EA $

8. GARDEN LIME FOR EFFLUENT DISINFECTION

Payment for application of garden lime to disinfect surface effluent present at the site.

Compensation shall include payment for all materials and labor necessary for application of disinfectant over the entire area covered by surface effluent

Garden Lime Disinfection 1 LS $

Portland Area Indian Health Service Revised 04/2021

Gravel Drainfields 02545 - 1

SECTION 02545 – ROCK DRAINFIELD SYSTEMS

PART 1 - GENERAL

1.1 SUMMARY

A. This section includes construction of rock drainfield systems.

1.2 REFERENCES

A. ASTM D2665 – Standard Specification for Poly Vinyl Chloride (PVC) Plastic Drain, Waste, and Vent Pipe and Fittings

B. ASTM D3034 – Standard Specification for Type PSM Poly Vinyl Chloride (PVC) Sewer Pipe and Fittings

C. ASTM D2241 – Standard Specification for Poly(Vinyl Chloride) (PVC) Pressure- Rated Pipe (SDR Series)

D. Uniform Plumbing Code

1.3 SUBMITTALS

A. Distribution Box

B. 4” PVC Perforated Pipe

C. Geotextile

1.4 QUALITY ASSURANCE

A. Excavation or construction of drainfields will not be allowed when the moisture content of the soil is greater than the plastic limit or when the occurrence of rain, snow or frost is such that the quality of construction may be impaired.

B. The materials and construction methods specified herein are minimum requirements.

Where the appropriate state/local septic codes require more stringent materials or execution methods, they shall apply.

PART 2 - PRODUCTS

2.1 SOLID SEWER PIPE AND FITTINGS

A. Conform to ASTM D2665.

B. 4-inch Schedule 40 PVC, DWV pipe.

C. Solvent weld fittings.

Gravel Drainfields 02545 - 2

2.2 DISTRIBUTION BOX

A. Single inlet and three (3) or more outlets.

B. High Density Polyethylene.

1. Equal to American Distribution Box by American Mfg. Co. or Distribution Box by Tuf-tite.

2. Flow equalizers equal to Dial-A-Flow by American Mfg. Co. or Speed Leveler by Tuf-Tite.

C. Precast Concrete.

1. Supplied with American Dial-A-Flow equalizers as supplied by American Mfg. Co.

D. Distribution Box Riser

1. Minimum 24-inch diameter corrugated HDPE pipe, dual wall.

2. Interlocking access riser with removable cover equal to Polylok Model 3008-HD.

2.3 PERFORATED PIPE

A. 4-inch PVC conforming to ASTM D3034.

B. Minimum sidewall thickness of 0.120-inches.

2.4 GEOTEXTILE

A. Non-woven polypropylene geotextile

B. Minimum 3 ounce per square yard

C. Equal to Mirafi 135N or Synthetic Industries 401.

2.5 CLEAN GRAVEL OR CRUSHED ROCK

A. Washed gravel.

B. Size from ¾ to 1 ½ inches, with not more than 10 percent fines below the ¾-inch size.

C. Crushed rock may be approved on an individual basis, provided an acceptance sample is submitted for analysis.

2.6 INSPECTION PORTS

A. Construct from 4-inch Schedule 40 PVC pipe and fittings conforming to ASTM D2665.

B. Solvent weld all connections

Gravel Drainfields 02545 - 3

C. Supply 4-inch slip on cap or threaded female adapter with 4-inch diameter threaded slotted white flush plug with threaded brass insert as manufactured by Sioux Chief or approved equal.

PART 3 - EXECUTION

3.1 SOLID SEWER PIPE

A. Install pipe from the outlet stub at the septic tank by rubber gasket joint.

B. Minimum slope for 4-inch sewer pipe is 1%.

C. A minimum of 6-inches of drop is required from the invert of the outlet pipe at the septic tank to the beginning of the drainfield.

D. Maintain a minimum of 3-feet of cover whenever possible.

E. Install polystyrene insulation in areas with less than 3 feet of cover or as instructed by the Owner.

F. Approved PVC adapters are required to connect PVC DWV pipe to PVC sewer pipe.

Fernco connections are not acceptable.

G. Solvent weld all joint connections.

3.2 DISTRIBUTION BOX

A. Install at location shown on the plans, in accordance to manufacturer’s recommendations.

B. Install distribution box level.

C. Set outlet pipes level and at equal elevation.

D. Set outlet pipes lower than the inlet pipe elevation.

E. Adjust flow equalizers to allow for even distribution to all outlet connections.

3.3 ROCK DRAINFIELD CONSTRUCTION

A. Excavate to the length and direction specified by the drawings and as instructed by the Owner.

B. Maintain level trench a minimum width of 24-inches.

C. Rake all smeared or compacted surfaces of sidewalls to a depth of 1-inch.

D. Remove loose material and install 6-inches of clean gravel.

E. Install 4-inch perforated pipe level and place gravel a minimum of 2-inches above the pipe.

Gravel Drainfields 02545 - 4

F. Install gravel the full width of the trench or bed and lay perforated pipe level as shown on detail drawings.

1. Cover the entire top of the gravel with geotextile prior to backfilling.

G. Backfill trench with the excavated material and provide adequate drainage away from drainfield area.

1. Hand tamp soil backfill.

2. Match existing drainage pattern for the site to prevent ponding on any part of the drainfield.

H. Accomplish final landscaping by harrowing, dragging, and raking to ensure uniform slope across the disturbed area.

I. Install rebar at four farthest corners of drainfield to delineate the drainfield area to act as a permanent metal detectable marker.

1. Install vertically, 1-foot away from the centerline of the piping and the centerline of the chamber.

2. Bury rebar 6-inches below the surface.

3.4 INSPECTION PORTS

A. Install a 4-inch Schedule 40 PVC pipe inspection port on each drainfield lateral end.

1. Insert pipe into the 4-inch cut-out hole on the top of the end of the chamber, rest on the inspection port seat, and secure in place with a stainless steel screw.

2. Install 4-inch Schedule 40 PVC inspection port to the bottom of gravel drainfields with a solvent weld toilet flange as shown on detail drawings.

B. Extend PVC inspection port to 18” above final finished grade.

C. Provide with slip on Schedule 40 PVC cap.

1. If requested by the homeowner or Owner, cut inspection ports off flush with finished grade and install a 4-inch Schedule 40 female adapter and plug.

D. Hand compact soil around inspection ports to a density equal to the surrounding soil.

3.5 AS-BUILTS

A. Provide as-built information on each system in accordance with County requirements.

B. Maintain information including but not limited to:

1. Home owner name & location.

2. Septic tank, access openings, cleanout, distribution box, and diverter valve location.

3. Material and size of all facilities including drainfield.

4. Any other pertinent project related information.

Gravel Drainfields 02545 - 5

C. Final approval and payment will not be made until an accepted as-built is supplied.

END OF SECTION

D. Hand compact soil around inspection ports to a density equal to the surrounding soil.

C. Final approval and payment will not be made until an accepted as-built is supplied.

D. Hand compact soil around inspection ports to a density equal to the surrounding soil.

C. Final approval and payment will not be made until an accepted as-built is supplied.