31 25 00 - Erosion And Sedimentation Controls.pdf

31 25 00 – EROSION AND SEDIMENTATION CONTROLS

Herbert, Rowland & Grubic, Inc. 31 25 00 - 1 000483.0450

SECTION 31 25 00 – EROSION AND SEDIMENTATION CONTROLS

PART 1 - GENERAL

1.1 SUMMARY

A. Section Includes:

1. Rock Construction Entrance(s)

2. Sediment Barriers.

3. Site Stabilization.

B. Related Sections:

1. Section 03 10 00 – Concrete Forming and Accessories.

2. Section 03 20 00 – Concrete Reinforcing.

3. Section 03 30 00 – Cast-In-Place Concrete.

4. Section 03 41 00 – Precast Structural Concrete.

5. Section 31 23 16 – Excavation.

6. Section 31 23 23 – Fill.

7. Section 32 05 13 – Soils for Exterior Improvements.

8. Section 32 05 16 – Aggregates for Exterior Improvements.

9. Section 32 13 13 – Concrete Paving.

10. Section 32 91 19 – Landscape Grading.

C. Description: This section of the specification shall serve as a supplement to the Erosion and Sediment Pollution Control Plan for the Project.

1.2 REFERENCES

A. Pennsylvania Department of Environmental Protection, Bureau of Soil and Water Conservation

1. Erosion and Sediment Control Program Manual

B. American Association of State Highway and Transportation Officials:

1. AASHTO T88 - Standard Specification for Particle Size Analysis of Soils.

2. AASHTO T180 - Standard Specification for Moisture-Density Relations of Soils

Using a 4.54-kg (10-lb) Rammer and a 457-mm (18-in.) Drop.

C. American Concrete Institute:

1. ACI 301 - Specifications for Structural Concrete.

D. ASTM International:

1. ASTM C127 - Standard Test Method for Density, Relative Density (Specific

Gravity), and Absorption of Coarse Aggregate.

2. ASTM D698 - Standard Test Method for Laboratory Compaction Characteristics of

Soil Using Standard Effort (12,400 ft-lbf/ft3 (600 kN-m/m3).

3. ASTM D1557 - Standard Test Methods for Laboratory Compaction Characteristics of Soil Using Modified Effort (56,000 ft-lbf/ft3 (2,700 kN-m/m3).

4. ASTM D2922 - Standard Test Method for Density of Soil and Soil-Aggregate in

Place by Nuclear Methods (Shallow Depth).

Herbert, Rowland & Grubic, Inc. 31 25 00 - 2 000483.0450

5. ASTM D3017 - Standard Test Method for Water Content of Soil and Rock in Place by Nuclear Methods (Shallow Depth).

E. Precast/Prestressed Concrete Institute:

1. PCI MNL-116S - Manual for Quality Control for Plants and Production of Precast and Prestressed Concrete Products.

1.3 SUBMITTALS

A. Section 01 33 00 – Submittal Procedures: Requirements for submittals.

B. Product Data: Submit data on products to be used.

C. Manufacturer's Certificate: Certify Products meet or exceed specified requirements.

1.4 CLOSEOUT SUBMITTALS

A. Section 01 77 00 – Closeout Procedures: Requirements for submittals.

1.5 QUALITY ASSURANCE

A. Perform Work according to State of Pennsylvania’s Erosion and Sediment Control Program Manual standards.

1.6 SEQUENCING

A. See Drawings for specific construction sequence.

1.7 PRE-INSTALLATION MEETINGS

A. Section 01 31 19 – Project Meetings: Pre-installation meeting.

B. Convene minimum one week prior to commencing work of this section.

1.8 ENVIRONMENTAL REQUIREMENTS

A. Section 01 61 00 – Product Requirements: Environmental conditions affecting products on site.

B. Do not place grout when air temperature is below freezing.

C. Do not place concrete when base surface temperature is less than 40 degrees F, or surface is wet or frozen.

PART 2 - PRODUCTS

2.1 ROCK AND GEOTEXTILE MATERIALS

A. Geotextile Separation Fabric:

1. Description:

a. Non-biodegradable, UV-resistant, nonwoven geotextile fabric.

Herbert, Rowland & Grubic, Inc. 31 25 00 - 3 000483.0450

b. Material: Polypropylene.

c. Edges: Selvaged or finished to prevent separation of outer material.

d. Calendar such that yarns will retain relative positions.

2. Performance and Design Criteria:

a. Minimum Unseamed Sheet Width: 15 feet.

b. Nominal Weight: 12 oz./sq. yd..

c. Minimum Sheet Thickness: 120 mils.

d. Apparent Opening Size:

1) No. 100 U.S. standard sieve size.

2) Comply with ASTM D4751.

e. Vertical Water Flow Rate:

1) 70 gpm/sq. ft., minimum average roll value.

2) Comply with ASTM D4491/D4491M.

f. Grab Tensile Strength:

1) 270 lbf, minimum average roll value.

2) Comply with ASTM D4632/D4632M.

g. Grab Tensile Elongation:

1) 50 percent, minimum average roll value.

2) Comply with ASTM D4632/D4632M.

h. Trapezoidal Tear Strength:

1) 125 lbf, minimum average roll value.

2) Comply with ASTM D4533/D4533M.

i. Puncture Strength:

1) 100 lbf, minimum average roll value.

2) Comply with ASTM D4833/D4833M.

j. UV Resistance at 500 Hours:

1) Strength Retention: 70 percent.

2) Comply with ASTM D4355/D4355M.

2.2 BLOCK, AGGREGATE, AND SOIL MATERIALS

A. Coarse Aggregate: as specified in Section 32 05 16.

B. Soil Backfill: Suitable backfill, as specified in Section 32 05 13.

2.3 PLANTING MATERIALS

A. Erosion Control Mulch Blanket.

1. Organic Mulch Material. Machine produced mat of organic, biodegradable mulch material evenly distributed and attached on one side of a photodegradable polypropylene mesh with high-strength threads conforming to the following physical properties:

a. Weight 8 ounces per square yard, minimum

b. Mat thickness Approximately 0.125 inch to 0.6 inch

2. Reprocessed Wood Fiber. Flexible, non-woven, biodegradable water absorbing mat of mechanically defibrated wood fibers and synthetic fibers with a photodegradable polypropylene netting laminated to one side of the mat and conforming to the following physical properties:

a. Weight 6.4 to 7.9 ounces per square yard

b. Mat thickness 0.105 inch, minimum

Herbert, Rowland & Grubic, Inc. 31 25 00 - 4 000483.0450

2.4 PIPE MATERIALS

A. Pipe: Plastic, as specified in Section 33 31 11.

2.5 SEDIMENT BARRIERS

A. Silt Sock

1. Provide filter sock meeting the compost filter sock requirements as shown below.

Material Type 3 mil HDPE 5 mil HDPE 5 mil HDPE Characteristics Photo-degradable Photo-degradable Bio-degradable

Diameters 12”, 18” 12”, 18”, 24”, 32” 12”, 18”, 24”, 32” Mesh Opening 3/8” 3/8” 3/8”

Tensile Strength 26 psi 26 psi UV Stability % Original Strength (ASTM G-155)

23% at 1000 hr. 23% at 1000 hr. 23% at 1000 hr.

Min. Functional Longevity 6 months 9 months 6 months

2. Compost: well-decomposed, stable, weed-free, organic compost derived from agriculture, food, stump grindings, and yard or wood/bark organic matter sources

– aerobically composted with no objectionable odors. Provide compost meeting the compost standards for compost filter socks:

a. Organic Matter Content: 80% - 100% (dry weight basis)

b. Organic Portion: Fibrous and elongated

c. pH: 5.5 - 8.0

d. Moisture Content: 35% - 55%

e. Particle Size : 98% pass through 1” screen

f. Soluble Salt Concentration: Max 5 dS/m (mmhos/cm)

B. High Volume Filter Bags: Made from woven geotextiles that meet the following standards:

1. Avg. Wide Width Strength: min 60 lb/in per ASTM D-4884.

2. Grab Tensile: min 205 lb per ASTM D-4632.

3. Puncture: min 110 lb per ASTM D-4833.

4. Burst: min 350 per ASTM D-3786.

5. UV Resistance: min 70% per ASTM D-4355.

6. AOS % Retained : 80 sieve per ASTM D-4751.

2.6 SOURCE QUALITY CONTROL (AND TESTS)

A. Section 01 40 00 – Quality Requirements: Testing, inspection and analysis requirements.

B. Perform tests on cement, aggregates, and mixes to ensure conformance with specified requirements.

PART 3 - EXECUTION

3.1 EXAMINATION

A. Section 01 73 00 – Execution Requirements: Verification of existing conditions before starting work.

Herbert, Rowland & Grubic, Inc. 31 25 00 - 5 000483.0450

B. Verify compacted subgrade or stabilized soil is acceptable and ready to support devices and imposed loads.

C. Verify gradients and elevations of base or foundation for other work are correct.

3.2 CONSTRUCTION ENTRANCE

A. Clear and grub the footprint of the rock construction entrance.

B. Excavating to depth required, forming embankment.

C. Place geotextile over subsoils and place aggregate.

3.3 SEDIMENT BARRIERS

A. Compost Filter Socks and Weighted Sediment Filter Tubes

1. Prepare placement area by removing all debris.

2. Place parallel to contour with both ends of the sock extended upslope at a 45 degree angle to the rest of the sock to prevent end-arounds.

3. Socks placed on earthen slopes should be anchored with stakes driven through the center of the sock or immediately downslope of the sock at intervals recommended by the manufacturer.

4. Where socks are placed on paved surfaces, concrete blocks should be used immediately downslope of the socks (at the same intervals recommended for the stakes) to help hold the sock in place.

3.4 SITE STABILIZATION

A. Incorporate erosion control devices indicated on the Drawings into the Project at the earliest practicable time.

B. Construct, stabilize and activate erosion controls before site disturbance within tributary areas of those controls.

C. Stockpile and waste pile heights shall not exceed 35 feet. Slope stockpile sides at 2: 1 or flatter.

D. Stabilize any disturbed area of affected erosion control devices on which activity has ceased and which will remain exposed for more than 20 days.

1. During non-germinating periods, apply mulch at recommended rates.

2. Stabilize disturbed areas which are not at finished grade and which will be disturbed within one year.

3. Stabilize disturbed areas which are either at finished grade or will not be disturbed within one year.

E. Stabilize stockpiles immediately.

3.5 FIELD QUALITY CONTROL

A. Section 01 40 00 – Quality Requirements: Field inspecting, testing, adjusting, and balancing.

Herbert, Rowland & Grubic, Inc. 31 25 00 - 6 000483.0450

B. Inspect erosion control devices on a weekly basis and after each runoff event. Make necessary repairs to ensure erosion and sediment controls are in good working order.

3.6 CLEANING

A. Section 01 73 00 – Execution Requirements: Requirements for cleaning.

B. When sediment accumulation in sedimentation structures has reached a point one-third depth of sediment structure or device, remove and dispose of sediment.

C. Do not damage structure or device during cleaning operations.

D. Do not permit sediment to erode into construction or site areas or natural waterways.

E. Clean channels when depth of sediment reaches approximately one half channel depth.

3.7 PROTECTION

A. Section 01 73 00 – Execution Requirements: Requirements for protecting finished Work.

END OF SECTION 31 25 00