6-170 must be within one pH unit of the background pH level of the re source and shall have a turbidity no greater than the receiving resource. This requi rement is applicable to concrete that is placed or spilled (including leakage from form s) as well as indirect contact via tools or equipment. Water not meeting release cri teria shall be addressed in the SEWPCP. Discharging impounded water to the stream must t ake place in a manner that does not disturb the stream bottom or cause erosion . The Contractor shall be responsible for monitoring pH with a calibrated meter accura te to 0.1 units. A record of pH measurements shall be kept in the Environmental Co ordinator’s log.
f.The Contractor shall contain all demolition debris (includi ng debris from wearing surface removal, saw cut slurry, dust, etc.) and shall not allo w it to discharge to any resource. All demolition debris shall be disposed of in accorda nce with Section
202.03 Removing Existing Superstructure, Structural Concrete, Railings, Curbs,
Sidewalks and Bridges. The Contr actor shall dispose of debris i n accordance with the Maine Solid Waste Law, Title 38 M.R.S.A., Section 1301 et. seq. Containment and disposal of demolition debris shall be addressed in the Contrac tor’s SEWPCP.
g.The Contractor shall air dry all treated lumber for at leas t 21 days before use. All treated timber surfaces shall be exposed during air-drying.
h.The Contractor shall place all permanent seeding in accorda nce with Section 618 - Seeding unless the Contract states otherwise. The Contractor sh all state what additional measures they will employ for soil stabilization bet ween November 1 st and April 1st.
i.The Contractor shall not remove rocks from below the normal high water line of any wetland, great pond, river, stream, or brook, except to the ext ent necessary for completion of the Work and as allowed by environmental permits. The Contractor shall not work below the high water line of a great pond, river , stream, or brook during periods of elevated water, except as necessary to protec t work in progress or for emergency flood control and as allowed by environmental per mits.
j.During periods of approved sus pension, the Contractor shall inspect and maintain temporary and permanent erosion controls in accordance with its approved SEWPCP.
k.All sites of disturbed soil out side the right-of-way such a s haul roads, staging areas, Equipment storage sites, mixing plants, and waste disposal site s including expansion of existing sites shall be graded smooth, loamed, seeded, and m ulched upon completion of the work. For a related provision, see Section 105.8.6 - Pit Requirements. IMPLEMENTATION OF SEWPCP 656.4.3 Follow Plan Until Acceptance of the Work, the Contrac tor must continuously provide soil erosion and water pollution controls in compliance with its approved SEWPCP as amended, if necessary, and in compliance wit h Section 656.4.5 - Additional Measures/Amendment of SEWPCP. 6-171 656.4.4 Inspection and Record Keeping The Environmental Coord inator must inspect and monitor all controls for the duration of the projec t and keep a written log. This log must include daily on-site precipitation and air temperatur e, as well as the performance, failure, and any corrective action for all controls in place. T he log must be updated at least weekly and after all significant storm runoff and flood events. The Environmental Coordinator must make this log available to the Department upon request. The Contractor will retain the log for three years after the completion of the project. 656.4.5 Additional Measures/Amendment of SEWPCP If there exis ts observable evidence of erosion or sedimentation despite the installation o f all controls in compliance with the Contractor’s approved SEW PCP, then the Contractor must undertake such additional measures as are necessary to stop such erosion and p revent further erosion or sedimentation. Observable evidence of erosion or sedimentation includes visible sheet, rill, or gully erosion, discoloration of water by suspended particles , areas of sediment accumulation, slumping of banks, deposition of soil, and visibl e dust. Such additional measures must be undertaken within 24 hours and completed withi n 48 hours from the time such evidence is observed, unless otherwise authorized by the D epartment. Within 7 days of that time, the Contractor must submit an amendment to its SEWPC P setting forth the apparent cause of the erosion or sedimentation and the addition al measures undertaken and that will continue to be undertaken. If the Contractor complies with the requirements of this Section, all additional measures and the amendment of the SEWPC P will be Extra Work and any Delay resulting from the additional measures will be analyz ed in accordance with Section 109.5 - Adjustments for Delay. 656.4.6 Duration of Contractor’s Responsibility The Contracto r shall provide temporary soil erosion and water pollution controls in complian ce with its SEWPCP and maintain all permanent control features until Acceptance of the Work. Once final surface treatments are established, the Contractor is responsible for r emoval of all temporary sedimentation control practices such as silt fence. Notwithstan ding the preceding sentence, all work needed to remedy damage to properly installed and main tained permanent control features caused by a weather-related Uncontrollable Event shall be Extra Work. PAYMENT 656.5.1 If Pay Item 656.75 Provided If the Schedule of Items contains Pay Item
656.75 for Temporary Soil Erosion and Water Pollution Control, payment will be made on a
Lump Sum basis, payment of which will constitute full and compl ete compensation for all labor, equipment, materials, inspection, professional services, and incidentals necessary to prepare, submit, obtain approval of, and properly implement the Contractor’s SEWPCP. The Lump Sum will be payable in installments as follows: 10% of the Lump Sum once the final SEWPCP is approved and the initial soil erosion and water pollu tion controls are in place and certified by the Contractor, with the 90% balance to be pai d as the Work progresses at a rate proportional to the percentage completion of the Contract.
Source: Maine Standard Specifications for Road and Bridge Construction, 2020 Edition. Pages 640–641 of 817.