Addendum No. 1 - FS 227 33 4211 Stormwater Gravity Piping Enclosure 51.pdf
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- Attached to
- 1202 - County Fire Station 227 New Build
- Solicitation number
- ANE223-ANE2C-6144
- Issued by
- San Bernardino County, California
About this file
This document is an Addendum No. 1 to the specification for stormwater gravity piping work at SBC Fire Station 227, prepared by STK Architecture, Inc. in August 2025. The specification covers stormwater drainage piping installation, including pipe materials, accessories, and related work such as excavation, fill, backfill, and bedding operations. The scope requires corrugated polyethylene drainage pipe compliant with AASHTO M 252 and ASTM D3350 standards, along with associated fittings in various configurations including tees, bends, elbows, cleanouts, reducers, and traps. Installation requirements mandate that pipe be laid to slope gradients as noted on layout drawings with a maximum variation from true slope of 1/8 inch in 10 feet, and the stormwater drainage system must be connected as shown on the construction plans.
The specification establishes execution requirements for trenching and backfill operations, requiring cover fill to be tamped in place and compacted around pipe sides and to the top of the pipe. All pipe and bedding must be protected from damage or displacement until backfilling operations commence. The document references related specification sections for excavation procedures, fill and backfill requirements, and stormwater drain details, and requires all submittals to follow the procedures outlined in Section 01 3000 Administrative Requirements. No pricing terms, contract duration, bid submission dates, or award information is included in this technical specification addendum.
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Text version
STK Architecture, Inc. August 2025
SBC Fire Station 227 33 4211-1 Stormwater Gravity Piping
SECTION 33 4211
STORMWATER GRAVITY PIPING
PART 1 GENERAL
1.01 SECTION INCLUDES
A. Stormwater drainage piping.
B. Stormwater pipe accessories.
1.02 RELATED REQUIREMENTS
A. Section 31 2316 - Excavation: Excavating of trenches.
B. Section 31 2323 - Fill and Backfill: Bedding and backfilling.
C. Section 33 4230 - Stormwater Drains.
1.03 REFERENCE STANDARDS
A. AASHTO M 252 - Standard Specification for Corrugated Polyethylene Drainage Pipe; latest edition.
B. ASTM D3350 - Standard Specification for Polyethylene Plastics Pipe and Fittings Material;
2014.
1.04 SUBMITTALS
A. See Section 01 3000 - Administrative Requirements, for submittal procedures.
PART 2 PRODUCTS
2.01 STORMWATER PIPE MATERIALS
A. Provide products that comply with applicable code(s).
2.02 PIPE ACCESSORIES
A. Fittings: Same material as pipe molded or formed to suit pipe size and end design, in required tee, bends, elbows, cleanouts, reducers, traps and other configurations required.
PART 3 EXECUTION
3.01 TRENCHING
A. Backfill around sides and to top of pipe with cover fill, tamp in place and compact, then complete backfilling.
3.02 INSTALLATION
A. Lay pipe to slope gradients noted on layout drawings; with maximum variation from true slope of 1/8 inch in 10 feet.
B. Connect storm drainage system as shown on plans.
3.03 PROTECTION
A. Protect pipe and bedding cover from damage or displacement until backfilling operation is in progress.
END OF SECTION Enclosure #51
Fire Station #227 11/17/25
| PART 1 GENERAL |
| 1.01 SECTION INCLUDES |
| A. Stormwater drainage piping. |
| B. Stormwater pipe accessories. |
| 1.02 RELATED REQUIREMENTS |
| A. Section 31 2316 - Excavation: Excavating of trenches. |
| B. Section 31 2323 - Fill and Backfill: Bedding and backfilling. |
| C. Section 33 4230 - Stormwater Drains. |
| 1.03 REFERENCE STANDARDS |
| A. AASHTO M 252 - Standard Specification for Corrugated Polyethylene Drainage Pipe; latest edition. |
| B. ASTM D3350 - Standard Specification for Polyethylene Plastics Pipe and Fittings Material; 2014. |
| 1.04 SUBMITTALS |
| A. See Section 01 3000 - Administrative Requirements, for submittal procedures. |
| PART 2 PRODUCTS |
| 2.01 STORMWATER PIPE MATERIALS |
| A. Provide products that comply with applicable code(s). |
| 2.02 PIPE ACCESSORIES |
| A. Fittings: Same material as pipe molded or formed to suit pipe size and end design, in required tee, bends, elbows, cleanouts, reducers, traps and other configurations required. |
| PART 3 EXECUTION |
| 3.01 TRENCHING |
| A. Backfill around sides and to top of pipe with cover fill, tamp in place and compact, then complete backfilling. |
| 3.02 INSTALLATION |
| A. Lay pipe to slope gradients noted on layout drawings; with maximum variation from true slope of 1/8 inch in 10 feet. |
| B. Connect storm drainage system as shown on plans. |
| 3.03 PROTECTION |
| A. Protect pipe and bedding cover from damage or displacement until backfilling operation is in progress. |
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