SECTION 02745

SEPTIC TANK SYSTEM

PART	GENERAL

SECTION INCLUDES

Septic tank, distribution box and filter drainage field system.

PRODUCTS FURNISHED BUT NOT INSTALLED UNDER THIS SECTION

Section [_____-__________]: Placement of pipe sleeves in concrete [foundation walls] [________________].

PRODUCTS INSTALLED BUT NOT FURNISHED UNDER THIS SECTION

Section [_____-__________]: Supply of connection devices to building sewage piping for placement by this Section.

RELATED SECTIONS

Section 02207 - Aggregate Materials.

Section 02222 - Excavating.

Section 02223 - Backfilling.

Section 02225 - Trenching.

Section 02607 - Manholes: Effluent discharge.

Section 02732 - Sanitary Sewerage Systems: Effluent discharge.

Section [______-____________]: Building sanitary drainage piping system: Effluent discharge.

Section 15410 - Plumbing Piping.

UNIT PRICE - MEASUREMENT AND PAYMENT

Septic Tank and Distribution Box:

Basis of Measurement: By the unit.

Basis of Payment: Includes excavating, placing and connecting to piping, backfilling.

Pipe and Fittings (Between Building Sanitary Piping and Septic Tank, Between Septic Tank and Distribution Box, Between Distribution Box and Filter Field):

Basis of Measurement: By the linear [foot] [________] ([meter] [________]).

Basis of Payment: Includes excavating, hand trimming, pipe and fittings, connections, connection to filter field header, [geotextile fabric,] backfilling.

Pipe and Fittings (Within Filter Field):

Basis of Measurement: By the square [foot] [________] ([meter] [________]) of field area, measured to outside of outer row and to end of pipe.

Basis of Payment: Includes excavating, hand trimming, aggregate bed and cover, pipe and fittings, distribution pipe filter field header, [geotextile fabric,] backfilling.

REFERENCES

ANSI A21.11 - Rubber Gasket Joints For Cast Iron and Ductile Iron Pressure Pipe and Fittings.

ANSI/ASTM A74 - Cast Iron Soil Pipe and Fittings.

ANSI/ASTM C12 - Practice for Installing Vitrified Clay Pipe Lines.

ANSI/ASTM C425 - Compression Joints for Vitrified Clay Pipe and Fittings.

ANSI/ASTM C700 - Vitrified Clay Pipe, Extra Strength, Standard Strength and Perforated.

ANSI/ASTM D2729 - Poly (Vinyl Chloride) (PVC) Sewer Pipe and Fittings.

ANSI/ASTM D2751 - Acrylonitrile-Butadiene-Styrene (ABS) Sewer Pipe and Fittings.

ANSI/ASTM D3033 - Type PSP Poly (Vinyl Chloride) (PVC) Sewer Pipe and Fittings.

ANSI/ASTM D3034 - Type PSM Poly (Vinyl Chloride) (PVC) Sewer Pipe and Fittings.

ASTM C4 - Clay Drain Tile.

ASTM C564 - Rubber Gaskets for Cast Iron Soil Pipe and Fittings.

SUBMITTALS

Submit under provisions of Section [01300.] [________.]

Shop Drawings: Indicate plan, location and inverts of filter field, inverts of connecting piping.

Product Data: Provide data on tank accessories and [________].

Manufacturer's Installation Instructions: Indicate special procedures for septic tank installation.

PROJECT RECORD DOCUMENTS

Submit under provisions of Section [01700.] [________.]

Accurately record actual locations and inverts of buried pipe, components, and connections.

REGULATORY REQUIREMENTS

Conform to [applicable] [___________] code and regulations for Work of this Section.

Provide certificate of compliance from [authority having jurisdiction] [________] indicating approval of systems.

COORDINATION

Coordinate work under provisions of Section [01039.] [________.]

Coordinate the work with connections to building sanitary sewer piping outlet.

PART	PRODUCTS

MANUFACTURERS - SEPTIC TANK AND DISTRIBUTION BOX

[__________________________________] Product [_________].

[__________________________________] Product [_________].

[__________________________________] Product [_________].

Substitutions: Under provisions of Section [01600.] [________.]

SEPTIC TANK AND DISTRIBUTION BOX

Septic Tank: Reinforced precast concrete construction, [4,000] [________] psi ([27.5] [____] MPa) 28 day minimum strength, concrete partitioned chambers, concrete lid with lift rings, vent, inlet inspection hole, inlet turned down minimum [12] [____] inches ([300] [____] mm) below effluent level.

****** [OR] ******

Septic Tank: [Steel with protective [epoxy] [________] coating] [Reinforced glass fiber], partitioned chambers, lid with lift rings, vent, inlet inspection hole, inlet turned down minimum [12] [____] inches ([300] [____] mm) below effluent level.

Tank Capacity: [750] [1,000] [1,500] [________] gallon ([2 840] [3 785] [5 680] [________] l).

Distribution Box: [Reinforced concrete] [________], single inlet, two outlets, gate, removable cover with lift ring.

CONNECTING PIPE MATERIALS

Ductile Iron Pipe [Type [____]]: ANSI/ASTM A74 [Extra Heavy] [Service] grade, plain end joint; nominal inside diameter of [____] inch ([____] mm):

Joint Device: ANSI A21.11 ribbed rubber gasket for positive seal; stainless steel clamp ring, expanding sleeve.

****** [OR] ******

Cast Iron Pipe [Type [____]]: [ANSI/ASTM A74] [Extra Heavy] [Service] grade, bell and spigot joint; nominal inside diameter of [____] inch ([____] mm):

Joint: ASTM C564.

****** [OR] ******

Joint Seal: [Rope and calk.] [Neoprene slip seal.]

****** [OR] ******

Vitrified Clay Pipe [Type [____]]: ANSI/ASTM C700 [Extra Strength] [Standard strength], bell and spigot joint; nominal inside diameter of [____] inch ([____] mm).

****** [OR] ******

Vitrified Clay Pipe [Type [____]]: ANSI/ASTM C700 [Extra Strength] [Standard strength], plain end joint; nominal inside diameter of [____] inch ([____] mm). Joint Device: ANSI/ASTM C425 compression gasket.

****** [OR] ******

Plastic Pipe (ABS) [Type [____]]: ANSI/ASTM D2751 SDR [23.5] [35] [42], nominal inside diameter of [____] inch ([____] mm), bell and spigot solvent sealed joints.

****** [OR] ******

Plastic Pipe (PVC) [Type [____]]: ANSI/ASTM D3033 Type PSP; nominal inside diameter of [____] inch ([____] mm), bell and spigot solvent sealed joints.

****** [OR] ******

Plastic Pipe (PVC) [Type [____]]: ANSI/ASTM D3034 Type PSM; nominal inside diameter of [____] inch ([____] mm), bell and spigot solvent sealed joints.

****** [OR] ******

Plastic Pipe (PVC) [Type [____]]: ANSI/ASTM D2729; nominal inside diameter of [____] inch ([____] mm), bell and spigot solvent sealed joints.

Fittings: Same material as pipe, tee bends, elbows, cleanouts, reducers, ends to suit pipe joint.

FILTER FIELD PIPE MATERIALS

Plastic Pipe (PVC) [Type [____]]: ANSI/ASTM D2729; plain end, nominal inside diameter of [____] inch ([____] mm).

****** [OR] ******

Vitrified Clay Pipe [Type [____]]: ANSI/ASTM C700 [Extra Strength] [Standard strength], plain end joint; nominal inside diameter of [____] inch ([____] mm).

****** [OR] ******

Clay Tile [Type [____]]: ASTM C4 [Standard] [Extra Quality] [Heavy Duty], plain end joint; nominal inside diameter of [____] inch ([____] mm).

****** [OR] ******

Bitumenized Fiber Pipe [Type [____]]: ANSI/ASTM D2311 Type [TJ - tapered pipe end and coupling] [BJ - split collar or internal coupling], plain end; nominal inside diameter of [____] inch ([____] mm).

Use [perforated] [unperforated] pipe at filter field system; unperforated through sleeves and at junction with distribution box.

BEDDING MATERIALS

Aggregate Bedding Material: Fill Type [A1] [A2] [A3] as specified in Section [02207.] [________.]

****** [OR] ******

Sand Bedding Materials: Fill Type [A4] [____] as specified in Section [02207.] [________.]

FILTER AGGREGATE

Filter Aggregate Materials: Fill Type [A1] [A2] [A3] as specified in Section [02207] [________].

****** [OR] ******

Filter Sand Materials: Fill Type [A4] [____] as specified in Section [02207.] [________.]

ACCESSORIES

Geotextile Fabric: [Non-woven fabric, polypropylene, minimum [____] oz/sq yd ([____] gm/sq m).] [________.]

PART	EXECUTION

EXAMINATION

Verify existing conditions under provisions of Section [01039.] [________.]

Verify that building sanitary sewer connection, size, location and invert are as indicated.

PREPARATION

Ream pipe ends and remove burrs.

Remove scale and dirt from components before assembly.

Establish invert elevations for all components in the system.

Hand trim excavation to suit septic tank, distribution box and field tile arrangement. Remove stones, roots or other obstructions.

TANK AND TANK BEDDING

Excavate in accordance with Section [02225] [________] for work of this Section. Hand trim excavation for accurate placement of tank to elevations indicated.

Place bedding material level in one continuous layer not exceeding [6] [8] [____] inches ([150] [200] [____] mm) compacted depth, compact to [95] [____] percent].

Backfill around sides of tank, tamped in place and compacted to [95] [____] percent.

Maintain optimum moisture content of bedding material to attain required compaction density.

Install septic tank and distribution box and related components on bedding in accordance with manufacturer's instructions.

CONNECTING PIPING

[Install vitrified clay pipe in accordance with ANSI/ASTM C12.]

Connect outlet between building sanitary piping and septic tank, between septic tank and distribution box, between distribution box and filter field header [with Type [____] pipe and fittings].

Place pipe and fittings on [____] inch ([____] mm) bed of [Type [____]] aggregate, tamp compacted.

****** [OR] ******

Place pipe and fittings on clean excavated subsoil.

Slope piping to each successive component, minimum of [1/4] [____] inch / foot ([19] [____] mm / m).

Cover pipe with [Type [____]] aggregate, sides and top. [Place geotextile fabric over cover prior to backfilling.]

INSTALLATION - FILTER FIELD

[Install vitrified clay pipe in accordance with ANSI/ASTM C12.]

Place field pipe header [, Type [____],] [at constant elevation] [sloping down from header inlet], [1/8] [____] inch / foot ([9] [____] mm / m).

Place [Type [____]] aggregate bed [18] [____] inch ([450] [____] mm) thick, tamp compact firm. Establish slope of bed to suit established invert elevations.

Place pipe sloping away from header minimum of [1/16] [____] inch / foot ([4.5] [____] mm / m) [, with perforations facing down].

Wrap pipe joints with paper, cover with [Type [____]] aggregate, sides and top. [Place geotextile fabric over cover prior to backfilling.]

Cover entire field with [Type [____]] aggregate [12] [____] inch ([300] [____] mm), lightly compact. Level prior to placement of subsoil cover as specified in Section [02223.] [________.]

FIELD QUALITY CONTROL

Field [inspection and] testing will be performed under provisions of Section [01400.] [________.]

Request inspection by [Architect/Engineer] [________] prior to placing aggregate cover over piping.

Compaction testing will be performed in accordance with [ANSI/ASTM D1557.] [ANSI/ASTM D698.] [AASHTO T180.] [ASTM D2922.] [ASTM D3017.]

If tests indicate Work does not meet specified requirements, [remove Work, replace and retest.] [refer to Section [01019] [01025] Defect Assessment.]

Frequency of Tests: [________________].

PROTECTION OF FINISHED WORK

Protect finished Work under provisions of Section [01500.] [________.]

Do not permit [vehicular] traffic over drainage field.

END OF SECTION