699MISCELLANEOUS TEMPORARY EROSION AND SEDIMENT CONTROL

New Hampshire Department of Transportation Standard Specifications – 2016

Description

1.1This work shall consist of miscellaneous temporary measures necessary to control erosion and sedimentation and protect

water quality through the life of the Contract. This work includes, but is not necessarily limited to, the use of pipes, berms, dams, sluices, sediment basins, fiber mats, silt booms, filter fabrics, netting, gravel, slope drains and other erosion control de vices or methods.

1.2The miscellaneous temporary erosion and sediment control provisions contained herein shall be coordinated with the

permanent erosion control features specified elsewhere in the Contract to the extent practicable to ensure economical, effective and continuous erosion and sediment control throughout the construction and post construction periods.

1.3The extent of erosion and sediment control will depend upon many factors, among which are the amount and type of soils

which may be exposed to erosion.

1.4The Department recognizes the importance of providing proactive effective erosion and sediment control and that siltation

could adversely affect the ecology. Materials

2.1Material requirements shall be as specified in 645.2 or as directed.

2.2Temporary slope drains may be constructed of rigid or flexible pipe, fiber mats, rubble, sluices, plastic sheets or other

acceptable material that will protect slopes from erosion.

2.3Fertilizer and soil conditioners shall meet the requirements of 642 and 643.

Construction Requirements

3.1Construction requirements shall be as specified in 645.3 or as directed.

3.2No work requiring erosion control shall commence until the Storm Water Pollution Prevention Plan (SWPPP) has been

approved. Method of Measurement

4.1Work authorized under this section will be measured as provided in 109.01 ; however, when such work falls within the

specifications for another Contract item, the work will be measured according to the met hod of measurement for that Contract item. Basis of Payment

5.1Payment for work authorized under this item will be made on a dollar basis according to 109.04 Method B, C or D.

5.1.1 The cost of construction and maintenance of temporary erosion and sediment control devices not provided for under a separate Contract item will be included for payment under this item.

5.2Payment for the following work will not be allowed under this item.

5.2.1 The temporary diversion of water during culvert construction and the dewatering, pumping and discharge of water at cofferdams and bridge sites shall be subsidiary to the pertinent Contract item. However, settlement basins, detention ponds or other approved sediment treatment measures required will be included for payment under this item unless otherwise shown on the plans. 5.2.2 Temporary erosion and sediment control measures required due to the Contractor's failure to install permanent controls as a part of the scheduled work, negligence, carelessness or type of operation outside the generally accepted standard construction practices within the State shall be at the Contractor's expense. 5.2.2.1 Temporary erosion and sediment control measures required at off -site areas including, but not limited to, haul roads, equipment and material storage sites, material pits, material processing sites and disposal areas shall be at the Contractor's expense. 5.2.3 Erosion control measures including dust control required for stockpiles of m aterials subject to wind or water erosion shall be at the Contractor’s expense. 5.2.4 Repair and maintenance of damaged or failed slopes, until project acceptance as stated in 104.13 shall be at the Contractor’s expense.

New Hampshire Department of Transportation Standard Specifications – 2016

5.3Direct costs plus project Engineering costs incurred by the Department to provide corrective temporary erosion and sediment

control deemed by the Engineer to be required and not provided by the Contractor will be charged to the Contractor and appropriate deductions made from the Contractor's estimates.

5.4The dollar amount inserted in the Proposal under this item is the amount the Department has set for miscellaneous temporary

erosion and sediment control measures. This amount must not be altered by the Bidder on the Proposal and must be included to obtain the Grand Total of the bid. 5.4.1 Payment of the amount set in the Proposal will not be a lump sum. Only the dollar value as authorized will be paid.

5.5When no mone y for this item is included in the Proposal under this item, it is anticipated that this work will be of minor

significance and will be the responsibility of the Contractor. Pay item and unit: 699. Miscellaneous Temporary Erosion and Sediment Control Dollar

New Hampshire Department of Transportation Standard Specifications – 2016

Table 702-1 – Anionic Asphalt Emulsion Type Rapid-Setting Grade RS-1 RS-1h RS-2 HFMS-2 MS-4 MS-5 min max min max min max min max min max min max Test Requirements: Emulsions: Viscosity, Saybolt Furol at 77 °F , s 20 100 20 100 100 see (1) 50 500 50 500 Viscosity, Saybolt Furol at 122 °F, s 75 400 Storage stability test, 24-h, % 1 1 1 1 1 1 Coating ability and water resistance: Coating, dry aggregate good 75+ 75+ Coating, after spraying fair see (2) (3)

Coating, wet aggregate fair Coating, after spraying fair Sieve test, % 0.10 0.10 0.10 0.10 0.10 0.10 Oil Distillate, % 2.0 7.0 0 3.0 Residue by distillation, % 55 55 63 65 65 65 Residue from distillation test: Penetration, 77 °F, 100 g, 5 s 100 200 40 90 100 200 100 200 200 150 250 Solubility in trichloroethylene, % 97.5 97.5 97.5 97.5 97.5 97.5 Float test, 140 °F , s 1200 50 100

Table 702-2 -- Cationic Asphalt Emulsion Type Rapid-Setting Grade CRS-1 CRS-1h min max min max Test Requirements: Emulsions:

Viscosity, Saybolt Furol at 77 oF, s 20 100 20 100 Viscosity, Saybolt Furol at 122 oF, s Storage stability test, 24-h, % 1 1 Sieve test, % 0.10 0.10 Oil Distillate, % 3 3 Residue by distillation, % 55 63 Residue from Distillation Test: Penetration, 77 oF, 100 g, 5 s 100 200 40 90 Solubility in trichloroethylene, % 97.5 97.5 Suggested spraying temperature, o C 25 60 25 60 Footnotes:

glass beaker and add soft tap water, approximately twice the volume of that of sand. Weigh into the beaker containing the sand and water 8 ± 0.2 g of the emulsion at room temperature and mix for two minutes with a stiff spatula. Cover the mixture with approximately twice its own volume of tap water and pour the water off without further mixing. Repeat this process. After the second rinse, at least 75 percent of the sand shall remain coated.

tap water, let stand for 12 to 16 hours, and examine. At least 75 percent of the sand shall remain coated.