READ AND **REMOVE THIS PAGE** BEFORE PLACING

THE SPECIFICATION SECTION IN THE CONTRACT

\* \* \* \* \* \* \* \* \* \*

[DIVISION 2: SITEWORK]{.underline}

SECTION 02541 ‑ SUBSURFACE EFFLUENT DISPOSAL SYSTEMS

\* [NOTICE TO DESIGNER!!]{.underline} \*

\* \*

\* THIS SPECIFICATION MUST BE MODIFIED TO \*

\* COMPLY WITH APPLICABLE STATE OR LOCAL \*

\* REQUIREMENTS \*

USE: Constructing or installing subsurface effluent disposal systems for
domestic septic tank effluent and similar wastewater.

**NOTES TO SPECIFIER:**

A. Options within paragraphs are identified by enclosure in brackets;
blank spaces enclosed by brackets \[[ ]{.underline}\] provide for
information to be inserted, as appropriate to individual projects.

B. **TO AVOID CONFLICTING REQUIREMENTS AND COSTLY MISTAKES,** the
specifier must edit (delete, substitute or add to the text). The
remaining paragraphs must be renumbered.

C. DELETE FOR FINAL COPY: Notes to the Specifier, located between lines
of asterisks; all \[brackets\], [underlining]{.underline}, **boldface,
**and *italics* within the paragraphs; and this page. (Open Reveal Codes
\[alt F3\] to do this accurately).

D. [To Edit "(Footer B)":]{.underline} (Corel 8). **ENTIRE FOOTER SHOULD
BE BOLDED. **Click in the footer and delete the "Project Name (ftr B)"
text and replace it with the **Name Of The Project (upper/lower case).**
Replace date with current MM/YY (WITHOUT BRACKETS).

E. The Guide Specifications are intended to be continuously reviewed and
revised. User's technical comments are appreciated. Also, other related
or similar specifications that are written "from scratch" that could
benefit others, or other questions can be sent to NSTC A/E Group, ST-110
or call (303) 987-6851.

F. DESIGN NOTES:

Proper design and construction of a subsurface wastewater effluent
disposal system requires knowledge of the quality and quantity of
effluent, the site's soil and groundwater conditions, and applicable
regulations. Regulatory requirements vary, with state or county health
departments or similar agencies normally having jurisdiction. Design of
these systems should begin with determination of these requirements,
which will often dictate the manner in which soil and groundwater
information must be obtained.

There are a wide variety of subsurface effluent disposal systems used
throughout the United States. This guide specification provides options
for some of the most common configurations, but may not include specific
components which may be best suited to a particular application.

The capacity of the soil to receive effluent via infiltration must be
predicted, and is used in conjunction with the effluent quality and
quantity parameters to determine the size of the system.

One of the first decisions the designer must make is whether to use
gravity or pressure distribution of effluent in the system. Gravity flow
is simplest and most commonly used, but often results in uneven
distribution of the effluent to the infiltrative surface. Pressure
distribution requires the use of dosing siphons or pumps to
intermittently release effluent to the system, providing a uniform
distribution. The diameter and configuration of the piping and
perforation size and spacing must be carefully determined in a pressure
distribution system to ensure a uniform "dose" occurs over the entire
system. Options for both types of systems, as well as for "gravelless"
gravity disposal chambers, are provided in the guide specification.
Users should delete the provisions which aren't applicable to the
desired system.

1\. **DRAWING DATA REQUIRED:**

A. Site plan showing configuration, horizontal and vertical control, and
locations of all lines, structures and appurtenances.

B. Trench, chamber and/or bed cross sections.

C. Details of distribution boxes, observation wells and any other
appurtenances.

**REVISIONS OF THIS SECTION:**

CSI format, editorial changes 7/01

Metric: Not Applicable

Technical Update: 8/00

**SECTION 02541**

**SUBSURFACE EFFLUENT DISPOSAL SYSTEM**

**[PART 1: GENERAL]{.underline}**

**1.1 SUMMARY**

**A. Section Includes: \[Constructing\] \[Furnishing\] \[and\]
\[Installing\] a \[pressurized\]\[gravity\] subsurface sewage effluent
disposal system \[including\] \[distribution boxes,\]\[absorption
trenches,\]\[seepage bed\]\[and\]\[observation wells\].**

**1.2 DEFINITIONS**

**\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\***

**TERMINOLOGY USED FOR SUBSURFACE EFFLUENT DISPOSAL SYSTEM COMPONENTS
VARIES. THIS SECTION DEFINES TERMS AS USED IN THIS ARTICLE. REVISE TERMS
AS REQUIRED, AND REVISE THROUGHOUT SECTION TO MATCH OTHER PROJECT
SPECIFICATION SECTIONS.**

**\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\***

**A. Wastewater: Sewage, graywater, or other liquid requiring
disposal.**

**B. Effluent: Treated or partially treated wastewater flowing out from
a septic tank or other treatment device.**

**C. Absorption Trench: A leach line installed in a trench with a layer
or gravel or aggregate for effluent disposal by soil absorption.**

**D. Leach Line: Perforated pipe and pipe fittings or plain pipe with
open joints which distributes effluent in a subsurface effluent disposal
system.**

**E. Solid Piping: Pipe without perforations and pipe fittings installed
with watertight joints.**

**\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\***

**RETAIN ONLY 1 OPTION FROM THE 3 PARAS BELOW THAT CORRESPONDS TO THE
TYPE OF WASTEWATER DISPOSAL SYSTEM BEING SPECIFIED.**

**\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\***

**F. Absorption Trenches: System of single leach lines installed in
trenches for effluent disposal.**

**G. Seepage Bed: System of multiple, parallel leach lines installed in
a bed of crushed stone or gravel for wastewater disposal.**

**\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\***

**GRAVELLESS EFFLUENT DISPOSAL SYSTEMS USE MANUFACTURED CHAMBERS TO MAKE
UP THE LEACH LINES OF AN ABSORPTION TRENCH SYSTEM INSTEAD OF PERFORATED
PIPING IN A GRAVEL LAYER. **

**\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\***

**H. Gravelless Effluent Disposal System: System of plastic or precast
concrete leaching chambers and distribution piping for effluent storage
and disposal, designed to significantly reduce the amount of gravel
needed in constructing the system.**

**1.3 SUBMITTALS**

**\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\***

**LIST ITEMS OF WORK THAT MIGHT LOGICALLY BE FURNISHED AND INSTALLED
UNDER THIS SECTION, BUT INSTEAD ARE SPECIFIED IN ANOTHER SECTION. THIS
ARTICLE IS RARELY REQUIRED.**

**\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\***

**A. General: Submittals shall be according to \[Section 01330 ‑
Submittal Procedures.\] \[and\] \[Section 01331 - Certificates.\]**

**B. Manufacturer\'s Data: Submit three copies each of product data for
the following items to be used for this project:**

**1. Pipe and fittings.**

**\[2. Distribution boxes.\]**

**\[3. Leaching Chambers.\]**

**\[4. Geotextile.\]**

**C. Shop Drawings: Submit three copies of shop drawings for the
\[subsurface effluent disposal system\]\[and\]\[distribution box\].
Drawings shall be \[same\] \[larger\] scale as the full size Contract
Drawings.**

**\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\***

**PERCOLATION TESTS SHOULD BE PERFORMED BY THE GOVERNMENT BEFORE THE
START OF THE PROJECT DESIGN. RETAIN PARA BELOW ONLY IF SPECIFYING
PERCOLATION TESTS IN (PART 3) \"FIELD QUALITY CONTROL\" ARTICLE.**

**\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\***

**D. Test Reports: Submit three copies of Percolation Test results.**

**E. Certificates of Conformance: Submit three copies of written
certification from the supplier of the following Contractor-furnished
items to be used on this project that they conform to the requirements
of this specification section: **

**1. Piping**

**2. Geotextile**

**3. Aggregate**

**4. Sand**

**1.5 QUALITY ASSURANCE**

**A. Regulatory Requirements: Comply with all applicable regulations and
requirements of the local health department and authorities having
jurisdiction.**

**1.6 STORAGE AND HANDLING**

**A. Storage: Items which are subject to deterioration by exposure to
the elements shall be stored off the ground, in a well-drained location,
protected from the weather, and accessible for inspection. Do not store
plastic structures and plastic pipe and fittings in direct sunlight.**

**1. Protect pipe, pipe fittings, and seals from dirt and damage.**

**B. Handling: Handle precast concrete structures according to
manufacturer\'s rigging instructions.**

**[PART 2: PRODUCTS]{.underline}**

**2.1 PIPES AND FITTINGS**

**\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\***

**USE ANY OF THE FOLLOWING THREE PIPE MATERIALS FOR GRAVITY FLOW OF
EFFLUENT BETWEEN THE DISTRIBUTION BOX AND LEACH LINES, OR BETWEEN
ABSORPTION TRENCHES.**

**\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*
**

**A. Polyvinyl Chloride (PVC) Sewer Pipe and Fittings: ASTM D 3034,
SDR 35, nonperforated, for solvent-cement or elastomeric gasket
joints.**

**1. Solvent Cement: ASTM D 2564.**

**2. Gaskets: ASTM F 477, elastomeric seal.**

**B. Acrylonitrile-Butadiene-Styrene (ABS) Sewer Pipe and Fittings: ASTM
D 2751, SDR 35, for solvent-cement or elastomeric gasket joints.**

**1. Solvent Cement: ASTM D 2235.**

**2. Gaskets: ASTM F 477, elastomeric seal.**

**C. Vitrified-Clay Sewer Pipe and Fittings: ASTM C 700, Standard
Strength, unglazed, for gasket joints.**

**1. Gaskets: ASTM C 425, rubber sealing element.**

**\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\***

**MATERIALS IN 5 PARAS BELOW ARE FOR USE IN GRAVITY LEACH LINES.**

**\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\***

**H. Polyvinyl Chloride (PVC) Sewer Pipe and Fittings: ASTM D 2729,
perforated, with solvent-cement joints.**

**1. Solvent Cement: ASTM D 2564.**

**I. Polyethylene (PE) Sewer Pipe: ASTM F 810, perforated.**

**1. Fittings: ASTM D 2729 or ASTM D 3034, polyvinyl chloride (PVC); or
ASTM D 2751, acrylonitrile-butadiene-styrene (ABS).**

**J. Polyethylene (PE) Tube and Fittings: ASTM F 405, corrugated with
perforations.**

**1. Couplings: PE band, matching tube and fitting dimensions.**

**\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\***

**IF CLAY DRAIN TILE IS TO BE USED, SELECT FROM THE 2 PARAS BELOW.**

**USE THE 1ST TILE BELOW FOR CLOSED-END JOINING. USE THE 2ND TILE BELOW
FOR OPEN-END JOINING.**

**\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\***

**K. Clay Drain Tile: ASTM C 498, Standard class, perforated, drain tile
with regular and smooth ends, for closed joints.**

**\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\* OR
\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\***

**K. Clay Drain Tile: ASTM C 4, Standard class, drain tile with regular
and smooth ends, for open joints.**

**\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\***

**USE THE COUPLINGS IN PARA BELOW FOR NONPRESSURE JOINTS BETWEEN
DIFFERENT TYPES OF PIPE MATERIALS, PIPES HAVING SMALL DIFFERENCES IN
OUTSIDE DIAMETER, AND PIPES OF DIFFERENT SIZES.**

**\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\***

**L. Sleeve-Type Couplings: Rubber or elastomeric sleeve and band
assembly fabricated to match outside diameters of pipes to be joined.**

**1. Sleeves for Vitrified-Clay Pipe: ASTM C 425, rubber.**

**2. Sleeves for Concrete Pipe: ASTM C 443 (ASTM C 443M), rubber.**

**3. Sleeves for Cast-Iron Soil Pipe: ASTM C 564, rubber.**

**4. Sleeves for Plastic Pipe: ASTM F 477, elastomeric seal.**

**5. Sleeves for Dissimilar Pipes: Compatible with pipe materials being
joined.**

**6. Bands: Stainless steel, at least one at each pipe insert.**

**\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\***

**USE THE COUPLINGS IN PARA BELOW FOR NONPRESSURE JOINTS BETWEEN PIPES
THAT ARE 1 OR 2 NOMINAL SIZES DIFFERENT IN DIAMETER.**

**\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\***

**M. Gasket-Type Couplings: Rubber or elastomeric compression gasket,
made to match outside diameter of smaller pipe and inside diameter or
hub of adjoining larger pipe.**

**1. Gaskets for Vitrified-Clay Pipe: ASTM C 425, rubber.**

**2. Gaskets for Concrete Pipe: ASTM C 443 (ASTM C 443M), rubber.**

**3. Gaskets for Cast-Iron Soil Pipe: ASTM C 564, rubber.**

**4. Gaskets for Plastic Pipe: ASTM F 477, elastomeric seal.**

**5. Gaskets for Dissimilar Pipes: Compatible with pipe materials being
joined.**

**\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\***

**USE COUPLINGS IN PARA BELOW FOR JOINTS BETWEEN DIFFERENT TYPES OF PIPE
MATERIALS.**

**\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\***

**N. Sleeve-Type Couplings: Rubber or elastomeric sleeve and band
assembly fabricated to match outside diameters of pipes to be joined.**

**1. Sleeves for Cast-Iron Soil Pipe: ASTM C 564, rubber.**

**2. Sleeves for Dissimilar Pipes: Compatible with pipe materials being
joined.**

**3. Bands: Stainless steel, at least 1 at each pipe insert.**

**\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\***

**USE THE FOLLOWING PIPE MATERIALS FOR PRESSURIZED LEACH LINES.**

**\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\***

O. PVC Pipe: Schedule 40, ASTM D1785, solvent weld socket joints, ASTM
D2672.

1\. Socket Fittings: Schedule 40 PVC, ASTM D2466.

2\. Threaded Adapters and Plugs: Schedule 80 PVC, ASTM D2464.

3\. Thread Sealing Tape: Teflon.

2.2 CLEANOUTS: Section 02533

2.3 DISTRIBUTION BOXES

SEE EDITING INSTRUCTION NO. 2 IN THE EVALUATIONS. DELETE THIS ARTICLE
WHEN DISTRIBUTION BOXES ARE NOT REQUIRED.

SHOW DISTRIBUTION BOX CAPACITY, MANHOLE, AND OTHER DATA ON THE DRAWINGS.

RETAIN 1 DESCRIPTION FROM THE 2 PARAS BELOW.

\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*

SELECT ONE OF THE FOLLOWING OPTIONS FOR A MANUFACTURED UNIT, OR DELETE
AND ADD APPROPRIATE PARAGRAPHS FOR A CUSTOM-DESIGNED UNIT

\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*

A. Description: Precast, reinforced-concrete box and cover, designed for
structural loading according to ASTM C 890 and made according to ASTM
C 913. Include coal-tar epoxy coating, 15-mil (0.381-mm) minimum
thickness covering internal areas above water line and extending at
least 4 inches (100 mm) below that point. Include pipe and fittings.

DELETE THE RESILIENT CONNECTORS IN PARA BELOW IF NOT REQUIRED.

1\. Resilient Connectors: ASTM C 923 (ASTM C 923M), of size required for
connecting piping, fitted into inlet and outlet openings.

MODIFY BELOW TO SUIT PROJECT AND TO CONFORM TO DETAIL. SPECIFY MANHOLE
EXTENSION AND FRAME AND COVER AT GRADE WHEN TOP OF BOX IS MORE THAN 18
INCHES (450 mm) BELOW GRADE.

2\. Manhole Lid and Frame: 24-inch, cast iron construction, removable
lid. Casting shall conform to ASTM A 48, Class 30 and shall be free of
porosity, shrink cavities, cold shuts or racks, or any surface defects
which would impair serviceability.

VERIFY AVAILABILITY BEFORE SPECIFYING THE DISTRIBUTION BOXES IN PARA
BELOW.

B. Description: Molded, polyethylene (PE) plastic construction, and
fabricated for distribution box application. Include 1 chamber with
baffles, manhole, and inlet and outlet pipe connections.

1\. Manhole: 20-inch (508-mm) minimum diameter, PE riser section with PE
cover.

2.4 ABSORPTION TRENCH MATERIALS

USE THIS ARTICLE WITH OPEN-JOINT AND PERFORATED ABSORPTION-FIELD PIPE.

A. Gravel Media: ASTM D 448, Size No. 24, 3/4- to 2-1/2-inch (19- to
63-mm) size, washed, crushed stone or gravel.

SELECT FILTER MAT FROM 2 OPTIONS BELOW.

B. Geotextile: Woven or spun filter fabric, in 1 or more layers, for
minimum total unit weight of 3.0 oz. per sq. yd. (0.10 kg/sq. m).

C. Joint Covers for Open-Joint Pipe: Geotextile woven filter fabric, in
one or more layers, for minimum total unit weight of 3.0 oz. per sq. yd.
(0.10 kg/sq. m), copper mesh screening, or commercial
corrosion-resistant metal clips made for this application.

2.5 SEEPAGE BED MATERIALS

USE THIS ARTICLE WITH OPEN-JOINT AND PERFORATED ABSORPTION-FIELD PIPE.

A. Gravel Media: ASTM D 448, Size No. 24, 3/4- to 2-1/2-inch (19- to
63-mm) size, washed, crushed stone or gravel.

SELECT FILTER MAT FROM 2 OPTIONS BELOW.

B. Geotextile: Woven or spun filter fabric, in one or more layers, for
minimum total unit weight of 3.0 oz. per sq. yd. (0.10 kg/sq. m).

C. Joint Covers for Open-Joint Pipe: Geotextile woven filter fabric, in
one or more layers, for minimum total unit weight of 3.0 oz. per sq. yd.
(0.10 kg/sq. m), copper mesh screening, or commercial
corrosion-resistant metal clips made for this application.

2.6 GRAVELLESS EFFLUENT DISPOSAL SYSTEM MATERIALS

SEE EDITING INSTRUCTION NO. 4 IN THE EVALUATIONS. DELETE THIS ARTICLE
WHEN EFFLUENT DISPOSAL SYSTEMS ARE NOT REQUIRED.

THE CHAMBERS IN THE PARA BELOW ARE MADE IN DIFFERENT CAPACITIES BY
DIFFERENT MFRS. SHOW THE ACTUAL TYPE, NUMBER, AND SIZE OF THE UNITS
REQUIRED OR THE TOTAL STORAGE CAPACITY REQUIRED AT EACH LOCATION.

A. Leaching Chambers: \[Molded polyethylene (PE)\]\[or\]\[precast
concrete\] units with \[perforated sides and\] open bottom, specifically
manufactured for use in subsurface effluent disposal systems. Each
chamber shall have a minimum capacity of \[\_\_\_\] gallons (\[\_\_\_\]
liters). Include piping, connectors, end plates, and any other standard
components as required for a complete system.

SELECT CHAMBER TYPE FROM THE 4 SUBPARAS BELOW.

RETAIN TYPE 1A, 1B, OR BOTH. WHEN BOTH TYPES ARE SPECIFIED, INDICATE THE
TOTAL STORAGE CAPACITY ON THE DRAWINGS.

B. Gravel Media: ASTM D 448, Size No. 24, 3/4- to 2-1/2-inch (19- to
63-mm) size, washed, crushed stone or gravel.

C. Geotextile: Woven or spun filter fabric, in one or more layers, for
minimum total unit weight of 4.0 oz. per sq. yd. (0.13 kg/sq. m).

2.7 MONITOR WELL PIPE: Shall be \[2\]‑inch perforated Class 160 PVC. Top
shall be fitted with a removable cap as shown.

2.8 CONCRETE: Section 03310 - Structural Concrete.

[PART 3: EXECUTION]{.underline}

3.1 EXAMINATION

A. Verification of Conditions: Verify that the site conditions allow for
construction of a subsurface effluent disposal system which meets the
dimensions, and elevations \[shown on the drawings.\] \[as staked by the
Government.\]

3.2 PREPARATION

A. Clearing and Grubbing: Shall be according to \[Section 02231 -
Clearing and Grubbing.\] \[Section 02310 - Site Grading.\] \[Section
02321 - Trenching.\]

3.3 INSTALLATION

A. General: The subsurface effluent disposal system shall be installed
\[at the locations shown on the drawings.\] \[as staked by the
Government.\]

B. Excavation: Shall conform to Section 02321 ‑ Trenching. The trench
shall be to the width and depths shown on the drawings. The absorption
trenches shall not be excavated when the soil is wet. The Contractor
shall not compact the effluent disposal area.

C. Unsuitable Excavated Material: Shall be removed from the site and
spread evenly in an area \[approved by the Contracting Officer.\]
\[shown on the drawings\].

\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*

IT IS [CRITICAL]{.underline} THAT THE SOIL AROUND THE ABSORPTION
TRENCHES NOT BE COMPACTED OR WORKED WET, UNLESS IT IS A GRANULAR
MATERIAL OR UNLESS THE DESIGN SUBSTANTIALLY REPLACES NATIVE MATERIAL
WITH SELECT MATERIAL.

\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*

D. \[Trench\]\[Bed\] Preparation: All smeared or compacted surfaces in
the gravel zone shall be raked to a depth of 1 inch, and all loose
material shall be removed before the gravel is placed in the
\[trench\]\[bed\]. Do not walk or operate any equipment on the prepared
soil surface.

E. Gravel Media: Shall be placed as shown on the drawings after the
prepared \[trench\]\[bed\] has been approved by the Contracting Officer.

F. Absorption \[Trench\]\[Bed\] Piping: The gravel surface onto which
the pipe will be placed shall be level and free of bumps, holes, or
debris. The perforated lines shall be laid true level without low spots
or sags, with perforations facing downward. Avoid the mixing of soil and
fines into the bedding during placement of drainfield piping and
backfilling. Heavy construction equipment shall not pass over the lines
during backfilling or other construction operations. Do not cover the
pipe or backfill until the Contracting Officer has inspected and
approved the work. Cap the ends of the laterals.

G. Soil Barrier: Shall be one piece of fabric, placed to extend at least
4 inches up each side of the \[trench\]\[bed\] in addition to covering
the surface of the gravel media. If fabric of sufficient width cannot be
obtained, the fabric shall lap a minimum of 1 foot at all seams, and
shall be rolled or laid according to the manufacturer\'s instructions.
The soil barrier shall not be backfilled or covered until it is
inspected and approved by the Contracting Officer.

H. Backfilling: Backfill material shall consist of native soil passing a
2-inch sieve. It shall be carefully placed and shall include an overfill
as shown on the Drawings to allow for settling. Special care shall be
taken to prevent compacting the material or disturbing the piping.

I. Installation of Marking Tape: Section 02501 - Utility Line Marking.

J. Monitor Well Pipe: Install pipes to a \[\_\_\_\_\]-ft depth with
\[\_\_\_\_\] ft above ground at locations indicated on the drawings.
Install removable cap.

K. Appurtenances: Shall be installed according to the manufacturer\'s
instructions.

3.4 FIELD QUALITY CONTROL

A. Testing: The Contractor shall conduct the field performance and
acceptance tests of the subsurface effluent disposal system lines. The
Contractor shall furnish all necessary equipment, labor, and materials.
Tests shall be conducted in the presence of the Contracting Officer.
When leakage exceeds the limits of the applicable leakage allowance or
if testing otherwise shows the installation to be less than
satisfactory, the sewer line and/or appurtenances shall be replaced or
repaired and retested at no additional expense to the Government until
the leakage is within acceptable limits and until all components perform
satisfactorily.

3.5 PROTECTION

A. Requirements: After construction of the subsurface effluent disposal
system and during the remainder of the construction, the Contractor
shall cordon, flag, or enclose the area in barricades and prevent any
vehicles or equipment from operating in the area.

[PART 4: MEASUREMENT AND PAYMENT]{.underline}

4.1 METHOD OF MEASUREMENT

\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*

WHEN A \"LUMP SUM\" CONTRACT IS USED, DELETE THE TITLE PART 4:
MEASUREMENT AND PAYMENT, AND BOTH ARTICLES FROM THIS SECTION.
MEASUREMENT AND PAYMENT WILL BE ADDRESSED IN PART 4 OF SECTION 01009 -
GENERAL INFORMATION AND REQUIREMENTS OR SECTION 01010 - SUMMARY OF WORK.

WHEN NOT A \"LUMP SUM\" CONTRACT, SELECT APPLICABLE PHRASES; USE THE
\"NO MEASUREMENT\" PHRASE WHEN NONE OF THE PAY ITEMS IN THIS SECTION ARE
INCLUDED IN THE BID SCHEDULE.

\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*

A. Units: The work described in this section will \[not be measured for
payment.\] \[be measured and paid for\] \[on a lump sum basis.\] \[by
the linear foot.\] \[by the cubic yard.\] \[per each unit.\]

4.2 BASIS OF PAYMENT

\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*

WHEN NOT A \"LUMP SUM\" CONTRACT, SELECT APPLICABLE PHRASES; USE THE
\"NO DIRECT PAYMENT\" PHRASE WHEN NONE OF THE PAY ITEMS IN THE
SPECIFICATION ARE INCLUDED IN THE BID SCHEDULE.

WHEN NOT A \"LUMP SUM\" CONTRACT AND PAYMENT IS TO BE MADE UNDER THIS
SECTION, SELECT APPLICABLE PAY ITEMS. DO NOT CHANGE PAY ITEM NUMBER.
WHEN MORE THAN ONE DIAMETER OR GAUGE IS SPECIFIED FOR ANY PAY ITEM,
LETTER SUFFIXES WILL BE ADDED AFTER THE PARENTHESIS OF THE ITEM NUMBER.
WHEN GOVERNMENT-FURNISHED PROPERTY IS SPECIFIED FOR PAY ITEMS, THE
LETTER SUFFIX GF WILL BE ADDED AFTER THE PARENTHESIS OF THE ITEM NUMBER.

\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*

A. Payment: \[No direct payment for the work described under this
section will be made. Consideration for this item shall be included in
the bid price for other items of the Contract.\] \[Prices and payment
will be full compensation for the work described in this section.
Payment will be made under:\]

[Pay Item]{.underline} [Pay Unit]{.underline}

02541(01) Subsurface Effluent Disposal System Lump Sum

02541(10) Effluent Disposal System Laterals Linear Foot

02541(20) Effluent Disposal System Aggregate Cubic Yard

END OF SECTION