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Item (d) includes removing mailboxes and supports, maintaining them at temporary locations, and reinstalling them at their permanent locations.
SP1092 (10-23-08)
(Use this Section for stormwater facilities. Remove subsections and work items that do not apply.)
SP1092 (10-23-08)
(Use this Section for stormwater facilities. Remove subsections and work items that do not apply.)
SECTION 01092 - STORMWATER CONTROL FACILITIES
Section 01092, which is not a Standard Specification, is included for this Project by Special Provision.
Description
01092.00 Scope - This work consists of furnishing and installing a stormwater biofiltration swale (bioswale) as shown or directed.
Materials
(Fill in the blank with one of the following types of pavers: heavy duty, medium duty, or light duty. Obtain the type to use from the Designer.)
01092.10 HDPE Porous Pavers - Furnish ___________________ HDPE porous pavers from the QPL or the Conditional List. Obtain the Engineer's approval before using pavers from the Conditional List.
01092.11 Blended Compost and Topsoil Mixture - Furnish composted yard debris meeting the requirements of 01040.15(b).
Furnish topsoil meeting the requirements of 01040.14.
Blend the composted yard debris and topsoil so that the mixture:
-
Is composed of between 40% and 50% composted yard debris material and between 50% and 60% topsoil material.
-
Has a pH between 5.5 and 8.0.
-
Does not have clumps greater than 3 inches in any direction.
-
01092.10 Biofiltration Soil Media - Furnish, mix, and place materials meeting the requirements in this Section. Materials may include existing, onsite materials, amended if necessary to meet the requirements in this Section, or materials from offsite sources.
-
Soil Media Requirements - Soil media to be a mixture of the composition specified in Table 1.1.
Table 1.1. Biofiltration soil media composition
Medium
|
Description
|
Percentage of Medium in Filter Layer
|
Sand
| -
Coarse grade with an effective particle size (D10) of 0.012” - 0.20” (0.3-0.5 mm)
-
Uniformity coefficient of less than 4
-
Washed
|
40% - 50%
|
Topsoil
| -
Loam or loamy sand texture per USDA Soil Textural Classification
-
Clay content of less than 5%
|
30% if loam, or
40% if loamy sand
|
Compost
|
Fine Compost material conforming to Special Provision 01040.15(b)
|
20% - 30%
|
Total Composition
|
100%
|
Total Organic Matter Content
|
Measured per ASTM Designation D 2974 (Standard Test Method for Moisture, Ash and Organic Matter of Peat and Other Organic Soils)
|
Approximately 10% by dry weight
|
Final biofiltration soil media shall meet the additional following requirements:
-
A pH between 5.5 and 7.0.
-
Minimum long-term hydraulic conductivity of 1.0 inches/hour per ASTM Designation D 2434 (Standard Test Method for Permeability of Granular Soils) at 80 percent compaction per ASTM Designation D 1557 (Standard Test Method for Laboratory Compaction Characteristics of Soil Using Modified Effort). Infiltration rate and hydraulic conductivity are assumed to be approximately the same in a uniform soil mix.
-
Uniformly mixed, and free of stones, stumps, roots, or other similar objects larger than two (2) inches.
-
Free of plant or seed material of non-native, invasive species, or noxious weeds as defined in Section 01030.02.
-
Soil Media Preparation - Soil mix preparation can be performed onsite or offsite and transported to the bioswale facility when ready for installation. The media shall be thoroughly mixed to ensure a uniform distribution in the mix. Onsite soil mixing or placement of soil media shall not be performed during saturated conditions.
-
Testing - Prior to installation, the soil media shall be tested. A minimum of one soil test shall be done for each bioswale. All of the samples shall be tested at the same approved soil testing laboratory. Required tests include sieve analysis, pH, and organic matter tests. The Contractor will pay for the tests. Seven (7) working days prior to placement of the soil mix prepared onsite, or transport of the soil mix prepared offsite, the Contractor shall submit the following to the Engineer:
-
A copy of the lab analysis report for each soil sample verifying that the material conforms to the requirements in these specifications.
-
A sample of the soil media to be used on the project, for each bioswale.
-
Acceptance of Material - Acceptance of each soil media material will be based upon a satisfactory Test Report from an approved soil testing laboratory for each sample tested and the sample(s) submitted to the Engineer.
-
Unacceptable Material - Soil media not conforming to the criteria specified in this section, or taken from a source other than those tested and accepted, shall be immediately removed from the project and replaced at no cost to the Contracting Agency.
01092.12 Plastic Board - Furnish plastic board meeting the following requirements:
-
Is HDPE or LDPE consisting of 75 percent overall recycled content, of which 50 percent is consumer material.
-
Does not contain paper, foil, or wood.
-
Smooth and free of splinters.
-
Includes an ultra-violet inhibitor.
-
Is consistent in color from piece to piece.
-
Contains no more than 3 percent air voids.
01092.13 Concrete - Furnish concrete meeting the requirements of Section 00440.
01092.14 Stone embankment Material - Furnish stone embankment material meeting the requirements of 00330.16 except:
-
Provide a maximum size between 9 inches and 3 inches.
-
No large rock fragments are allowed.
01092.15 Drainage Geotextile - Furnish Type 1 drainage geotextile meeting the requirements of Section 02320. Provide "Level B" documentation according to 02320.10(c).
01092.16 Riprap Geotextile - Furnish Type 1 riprap geotextile meeting the requirements of Section 02320. Provide "Level B" documentation according to 02320.10(c).
01092.17 Riprap - Furnish riprap meeting the requirements of 00390.11.
01092.18 Manholes, Catch Basins, and Inlets - Furnish manholes, catch basins, and inlets meeting the requirements of 00470.10.
01092.19 Storm Sewer Pipe - Furnish storm sewer pipe meeting the requirements of 00445.11.
Construction
01092.40 General - Construct water quality facility as shown or directed. Perform swale excavation work only when the biofiltration swale area is dry. Do not stockpile excavated material in the biofiltration swale area. Scarify the subsoil area a minimum 12 inches deep. After scarification, place the blended compost and topsoil mixture in maximum 12 inch lifts. Compact each lift by saturating it with water.
01092.41 Bioswales
-
Construction Site Stabilization - Prevent stormwater runoff from the construction site from entering a bioswale facility until the area draining to the facility has been permanently stabilized.
-
Soil Excavation and Preparation - Perform according to the following requirements:
-
Perform swale excavation work only when the biofiltration swale area is dry.
-
Do not stockpile excavated material in the biofiltration swale area.
-
Prevent compaction and smearing of the soils in the base and sidewalls of bioswale facilities. Use light equipment only within the facility basin.
-
If smearing occurs, rake or rototill the smeared areas of the interface before placing backfill material.
-
If compaction occurs at the base of a facility, scarify the subsoil a minimum of 12 inches deep.
-
Scarify soil surface by raking manually.
-
Biofiltration Soil Media Placement, Grading, and Compaction - Perform according to the following requirements:
-
After surface scarification, place biofiltration soil media in maximum 12-inch lifts. Compact each lift by saturating it with water. Ensure that the final surface invert and final surface grade are according to the plans.
-
Rake soil media to level out.
Maintenance
01092.70 Cleaning - If a stormwater control facility is used for erosion and sediment control, remove all accumulated sediment and debris before completing the facility.
Measurement
01092.80 Measurement - No measurement of quantities will be made for work performed under this Section. The estimated quantities of materials are:
Obtain items and quantities from the Designer. Fill all the required blanks. Delete items that do not apply.)
Item Quantity
HDPE Porous Pavers ____ Sq. Ft.
Blended Compost and Topsoil MixtureBiofiltration Soil Media ____ Cu. Yd.
Plastic Board Flow Spreader ____ Foot
Concrete Basin Flow Spreader ____ Each
Rock Basin Flow Spreader with Stone Embankment ____ Cu. Yd.
Rock Basin Flow Spreader with Riprap ____ Cu. Yd.
Drainage Geotextile, Type 1 ____ Sq. Yd.
Riprap Geotextile, Type 1 ____ Sq. Yd.
Loose Riprap, Class ____ ____ Cu. Yd.
Concrete Storm Sewer Manhole (Flow Splitter) ____ Each
Ditch Inlet, Type D ____ Each
____ Inch ____ Storm Sewer Pipe ____ Foot
Excavation (incidental to "Embankment in Place") 2260 Cu. Yd.
Biofiltration Soil Media Mix 192 Cu. Yd.
Payment
01092.90 Payment - The accepted quantities of work performed under this Section will be paid for at the Contract lump sum amount for the item "Water Quality Swale".
???
Payment will be payment in full for furnishing and placing all materials, and for furnishing all equipment, labor, and incidentals necessary to complete the work as specified.
SECTION 02001 - CONCRETE
SECTION02001 – CONCRETE
Comply with Section 02001 of the Standard Specifications modified as follows:
Replace Table 02001-1 with the following:
Table 02001-1
Concrete Strength and Water/Cementitious
Material (w/cm) Ratio
|
Type of
Concrete
|
Strength
(psi)
|
Maximum
w/cm Ratio
|
Structural
|
3600
|
0.48
|
HPC4000
|
0.40
|
HPC4500
|
0.40
|
5000 and above
|
0.40 1
|
1 PPCM's with cast-in-place decks and no
entrained air may have w/cm as follows:
5000 psi - 0.48; 5500 psi - 0.44; 6000 psi and up - 0.42
|
Section 01092, which is not a Standard Specification, is included for this Project by Special Provision.
Description
01092.00 Scope - This work consists of furnishing and installing a stormwater biofiltration swale as shown or directed.
Materials
(Fill in the blank with one of the following types of pavers: heavy duty, medium duty, or light duty. Obtain the type to use from the Designer.)
01092.10 HDPE Porous Pavers - Furnish ___________________ HDPE porous pavers from the QPL or the Conditional List. Obtain the Engineer's approval before using pavers from the Conditional List.
01092.11 Blended Compost and Topsoil Mixture - Furnish composted yard debris meeting the requirements of 01040.15(b).
Furnish topsoil meeting the requirements of 01040.14.
Blend the composted yard debris and topsoil so that the mixture:
-
Is composed of between 40% and 50% composted yard debris material and between 50% and 60% topsoil material.
-
Has a pH between 5.5 and 8.0.
-
Does not have clumps greater than 3 inches in any direction.
-
01092.10 Biofiltration Soil Media - Furnish, mix, and place materials meeting the requirements in this Section. Materials may include existing, onsite materials, amended if necessary to meet the requirements in this Section, or materials from offsite sources.
-
Soil Media Requirements – Soil media to be a mixture of the composition specified in Table 1.1.
Table 1.1. Biofiltration soil media composition
Medium
|
Description
|
Percentage of Medium in Filter Layer
|
Sand
| -
Coarse grade with an effective particle size (D10) of 0.012” - 0.20” (0.3-0.5 mm)
-
Uniformity coefficient of less than 4
-
Washed
|
40% - 50%
|
Topsoil
| -
Loam or loamy sand texture per USDA Soil Textural Classification
-
Clay content of less than 5%
|
30% if loam, or
40% if loamy sand
|
Compost
|
Material conforming to Special Provision 01040.15(b)
|
20% - 30%
|
Total Composition
|
100%
|
Total Organic Matter Content
|
Measured per ASTM Designation D 2974 (Standard Test Method for Moisture, Ash and Organic Matter of Peat and Other Organic Soils)
|
Approximately 10% by dry weight
|
Final biofiltration soil media shall meet the additional following requirements:
-
A pH between 5.5 and 7.0.
-
Minimum long-term hydraulic conductivity of 1.0 inches/hour per ASTM Designation D 2434 (Standard Test Method for Permeability of Granular Soils) at 80 percent compaction per ASTM Designation D 1557 (Standard Test Method for Laboratory Compaction Characteristics of Soil Using Modified Effort). Infiltration rate and hydraulic conductivity are assumed to be approximately the same in a uniform soil mix.
-
Uniformly mixed, and free of stones, stumps, roots, or other similar objects larger than two (2) inches.
-
Free of plant or seed material of non-native, invasive species, or noxious weeds as defined in Section 01030.02.
-
Soil Media Preparation - Soil mix preparation can be performed onsite or offsite and transported to the bioswale facility when ready for installation. The media shall be thoroughly mixed to ensure a uniform distribution in the mix. Onsite soil mixing or placement of soil media shall not be performed during saturated conditions.
-
Testing - Prior to installation, the soil media shall be tested. A minimum of one soil test shall be done for each bioswale. All of the samples shall be tested at the same approved soil testing laboratory. Required tests include sieve analysis, pH, and organic matter tests. The Contractor will pay for the tests. Seven (7) working days prior to placement of the soil mix prepared onsite, or transport of the soil mix prepared offsite, the Contractor shall submit the following to the Engineer:
-
A copy of the lab analysis report for each soil sample verifying that the material conforms to the requirements in these specifications.
-
A sample of the soil media to be used on the project, for each bioswale.
-
Acceptance of Material - Acceptance of each soil media material will be based upon a satisfactory Test Report from an approved soil testing laboratory for each sample tested and the sample(s) submitted to the Engineer.
-
Unacceptable Material - Soil media not conforming to the criteria specified in this Section, or taken from a source other than those tested and accepted, shall be immediately removed from the project and replaced at no cost to the Contracting Agency.
01092.12 Plastic Board - Furnish plastic board meeting the following requirements:
-
Is HDPE or LDPE consisting of 75 percent overall recycled content, of which 50 percent is consumer material.
-
Does not contain paper, foil, or wood.
-
Smooth and free of splinters.
-
Includes an ultra-violet inhibitor.
-
Is consistent in color from piece to piece.
-
Contains no more than 3 percent air voids.
01092.13 Concrete - Furnish concrete meeting the requirements of Section 00440.
01092.14 Stone embankment Material - Furnish stone embankment material meeting the requirements of 00330.16 except:
-
Provide a maximum size between 9 inches and 3 inches.
-
No large rock fragments are allowed.
01092.15 Drainage Geotextile - Furnish Type 1 drainage geotextile meeting the requirements of Section 02320. Provide "Level B" documentation according to 02320.10(c).
01092.16 Riprap Geotextile - Furnish Type 1 riprap geotextile meeting the requirements of Section 02320. Provide "Level B" documentation according to 02320.10(c).
01092.17 Riprap - Furnish riprap meeting the requirements of 00390.11.
01092.18 Manholes, Catch Basins, and inlets - Furnish manholes, catch basins, and inlets meeting the requirements of 00470.10.
01092.19 Storm Sewer Pipe - Furnish storm sewer pipe meeting the requirements of 00445.11.
Construction
01092.40 General - Construct water quality facility as shown or directed. Perform swale excavation work only when the biofiltration swale area is dry. Do not stockpile excavated material in the biofiltration swale area. Scarify the subsoil area a minimum 12 inches deep. After scarification, place the blended compost and topsoil mixture in maximum 12 inch lifts. Compact each lift by saturating it with water.
01092.41 Bioswales
-
Construction Site Stabilization – Prevent stormwater runoff from the construction site from entering a bioswale facility until the area draining to the facility has been permanently stabilized.
-
Soil Preparation and Excavation - Perform according to the following requirements:
-
Perform swale excavation work only when the biofiltration swale area is dry.
-
Protect the base and sidewalls of bioswale facilities from heavy equipment prior to and after placement of the biofiltration soil media to prevent compaction and smearing of the soils. Use light equipment only within the facility basin, such as light excavation hoes, light equipment with turf-type tires, marsh equipment, or wide-track loaders.
-
Do not stockpile excavated material in the biofiltration swale area.
-
Scarify the subsoil area a minimum 12 inches deep by raking manually. If smearing occurs, rake or rototill the smeared areas of the interface before placing backfill material. If applicable, install an underdrain.
-
Biofiltration Soil Media Placement, Grading, and Compaction - Perform according to the following requirements:
-
After scarification, place biofiltration soil media in maximum 12-inch lifts. Compact each lift by saturating it with water. If necessary, overfill above the proposed surface invert and surface grade to compensate for natural settlement to the proper grade. Compact invert area at final grade to 75% proctor.
-
Rake soil media to level out.
Maintenance
01092.70 Cleaning - If a stormwater control facility is used for erosion and sediment control, remove all accumulated sediment and debris before completing the facility.
Measurement
01092.80 Measurement - No measurement of quantities will be made for work performed under this Section. The estimated quantities of materials are:
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