CONSTRUCTION STANDARD SPECIFICATION

SECTION 02720

[STORM SEWER SYSTEMS]{.underline}

Page

PART 1 - GENERAL

1.01 Summary [2](#summary)

1.02 Submittals [2](#submittals)

1.03 Quality Assurance [2](#quality-assurance)

PART 2 - PRODUCTS

2.01 Pipe And Fittings [3](#pipe-and-fittings)

2.02 Joints [3](#joints)

PART 3 - EXECUTION

3.01 Pipe Laying [4](#pipe-laying)

3.02 Cleaning [4](#cleaning)

3.03 Inspection [5](#inspection)

CONSTRUCTION STANDARD SPECIFICATION

SECTION 02720

[STORM SEWER SYSTEMS]{.underline}

# PART 1 - GENERAL

## 1.01 SUMMARY

A. This section shall apply to the materials and operations required for
the installation of exterior storm sewer systems.

B. The extent of the work is indicated on the contract drawings.

C. Related Sections: Refer to the following sections for related work:

1\. Section 02200, \"Earthwork\".

2\. Section 02725, \"Sewer Manholes\".

3\. Section 03300, \"Cast-in-Place Concrete\".

4\. Section 05120, \"Structural Steel\".

## 1.02 SUBMITTALS

Submit Material Safety Data Sheets (MSDS) for reinforced concrete pipes,
cement mortar and joint compounds as required.

## 1.03 QUALITY ASSURANCE

A. The materials and practices comprising the work shall conform to this
and other referenced standard specifications.

B. All materials used shall not contain any asbestos fibers.

# PART 2 - PRODUCTS

## 2.01 PIPE AND FITTINGS

Piping materials shall be as indicated on the contract drawings. Each
section shall be marked with a permanent label which allows
identification of class and type of material. In addition, pipe
materials shall conform to the following requirements:

A. Reinforced Concrete Pipe and Fittings: Class III minimum or class as
specified on the contract drawings, conforming to ASTM C 76. Reinforced
concrete pipe shall be a minimum of 18\" in diameter, unless otherwise
shown on the drawings.

B. Corrugated Steel Pipe and Fittings: Materials for the corrugated
metal pipe (CMP), pipe arches and convectors including base metal,
rivets and spelter coating shall be as specified in AASHTO M 36. CMP
shall be used for the construction of culvert road crossings only and
shall be a minimum of 18\" in diameter, unless otherwise shown on the
drawings.

C. Ductile Iron Sewer Pipe: 4\" Class 51, 6\" or larger Class 50, or
class as specified on the contract drawings, conforming to ASTM A 746.
Ductile iron pipe shall be a minimum of 4\" and a maximum of 12\" in
diameter, unless otherwise shown on the drawings.

## 2.02 JOINTS

Joints shall be supplied with the pipe or fitting. Gasket materials
shall be stored in accordance with ASTM C 443. In addition, the joints
shall conform to the following requirements:

A. Joints for reinforced concrete pipe shall be \"O\"-ring rubber
gaskets conforming to ASTM C 361 and C 443.

B. Joints for corrugated steel pipe shall have joining bands which are
the same gauge and material as the pipe.

C. Ductile iron pipe shall have push-on joints conforming to the
applicable requirements of AWWA C111.

# 

# PART 3 - EXECUTION

## 3.01 PIPE LAYING

A. General: Provide drainage pipe of the size, and class indicated and
install at the locations and elevations indicated on the contract
drawings.

B. Pipe installation shall be in accordance with the pipe
manufacturer\'s written installation instructions and with the
applicable provisions or requirements of the following referenced
handbooks and standard specifications:

1\. Ductile Iron Sewer Pipe: American Water Works Association C600.

2\. Reinforced Concrete Pipe: American Concrete Pipe Association
\"Concrete Pipe Installation Manual\".

3\. Corrugated Steel Pipe: \"Handbook of Steel Drainage & Highway
Construction Products\".

C. Pipe shall be laid on a smoothly-graded, prepared subgrade soil
foundation true to alignment and grade as indicated on the contract
drawings. Bell holes shall be hand-excavated so that the bottom of the
pipe is in continuous contact with the surface of the prepared subgrade
material.

D. Pipe laying shall proceed upstream with the spigot ends pointing in
the direction of flow. Pipe shall not be laid in standing water or when
trench or weather conditions are deemed unsuitable by the Sandia
Delegated Representative (SDR).

E. Approved backfill material shall be spaded and compacted into the
\"haunch\" area under each side of the pipe so that all void spaces
underneath the pipe are filled with compacted backfill material.

F. Approved backfill material shall be placed in the trench along the
side of the pipe and compacted by hand up to the top of the pipe.
Approved backfill material shall be placed and compacted a minimum of
12\" above the top of the pipe.

## 3.02 CLEANING

A. Prior to laying pipe, the interior of each pipe section shall be
cleaned of all soil and debris.

B. After laying and backfilling, all pipe interiors shall be free of all
foreign material such as soil, cement mortar, joint compounds, etc. If
large amounts of material have accumulated, the SDR may require flushing
of the pipe. If flushing is required, any outlets into existing lines
will be blocked so that no foreign material is discharged into existing
lines.

## 

## 3.03 INSPECTION

A. Upon arrival at the job site, each section of pipe shall be inspected
for compliance with the applicable piping materials product requirements
listed in Part 2 of this specification. Accepted sections of pipe may be
marked by the SDR. Any section of pipe found to be defective shall be
immediately removed from the job site and shall be replaced by the
Contractor at no additional cost to Sandia National Laboratories (SNL).

B. Immediately prior to laying, each pipe section shall be visually
inspected for defects or damage. Any damaged or defective pipe shall not
be used.

C. Pipe roundness shall not vary from a true circle by more than 5% of
the pipe\'s normal diameter and deviation from straight line parallel to
pipe length shall not exceed 1/16\" per linear foot measured on the
concave side. Allowable deviation from vertical grade shown on the
drawings shall be no more than 1/2\" below or above the true grade line.
In addition, vertical sags and crowns in the pipe joint shall be no more
than 1/2\" across any 16 feet of pipe length. Horizontal alignment
between manholes shall be within 3\" of the true line as shown on the
drawings and shall not vary more than 1/2\" across any single joint of
pipe. Any sections of pipe found to be defective, damaged, or in poor
alignment shall be taken up and relaid or replaced at the Contractor\'s
expense.

D. Storm sewer lines normally need not be tested, but if in the opinion
of the SDR, the workmanship and material do not appear to be
satisfactory, the SDR may require that the section be tested according
to UNI-B-6, \"Recommended Practice for Low-pressure Air Testing of
Installed Sewer Pipe\". If the line fails to meet the requirements of
the test, the Contractor shall determine the source or sources of
leakage and shall make repairs as necessary at no additional cost to
SNL. The pipe installation shall be retested after making repairs to
verify that it meets the requirements of the test.

END OF SECTION