2−60 213.02 MATERIALS . Millings shall consist of bituminous material removed from the project roadway during cold planing operations and ground or crushed such that 100 percent of the material passes a 1-inch sieve. Millings shall be obtained from stockpiled locations on the project site, and shall be free of debris, topsoil and soil clumps. Millings may not be obtained from off-site sources unless specifically authorized by the Engineer. 213.03 CONSTRUCTION METHODS . The Contractor shall grade beneath the guardrail such that the finish surface of the millings is flush with the bituminous berm or edge of pavement. The millings shall be placed to a point 1 foot behind the guardrail post, and shaped, compacted and sloped to drain away from the pavement. The Cont ractor will not be allowed to dismantle the guardrail to perform any work associated with this item. The stockpiling of millings shall be restricted to approved, on-site locations, and in no instance will stockpiling of millings be allowed on the roadway shoulder or immediately adjacent to a travel lane. The Contractor shall use a suitable means to excavate and remove the material beneath the guardrail such that damage to the guardrail does not result, and to place the millings as indicated on the Plans or as directed by the Engineer. All material that is removed from beneath the guardrail, including excess millings, shall be legally disposed of. 213.04 METHOD OF MEASUREMENT . “Placement of Millings Beneath Guardrail” will be measured by the number of linear feet of guardra il for which millings were actually placed in accordance with the Plans and/or as directed by the Engineer. 213.05 BASIS OF PAYMENT . The accepted quantity of “Placement of Millings Beneath Guardrail” will be paid for at the contract unit price per linear f oot as listed in the Propos al. The price so-stated constitutes full and complete compensation for all labor, equipment and tools, including removal and disposal of the existing material, and all incidentals required to finish the work, complete and accepted by the Engineer. CONTAINMENT SYSTEM FOR CONTROL OF HYDRODEMOLITION RUNOFF AND MAINTENANCE AND DISPOSAL OF HYDRODEMOLITION RUNOFF
214.01 DESCRIPTION . This work consists of the provision of an on-site containment system for
runoff from hydrodemolition operations, a system wh ich shall provide for the temporary storage of discharge from the hydrodemolition operations, allow for the settlement of suspended materials from the hydrodemolition runoff, and enable the colle ction of sediments and other materials from the containment system for off-site disposal. 214.02 MATERIALS . Any use of materials not specifically included on the Plans and/or in this Specification shall require the prior approval of the Engineer. 2−61
214.03 CONSTRUCTION METHODS . At least thirty (30) days prior to starting hydrodemolition
operations, the Contractor shall submit for the Engineer’s approval the proposed storage area and maintenance plan for the hydrodemolition runoff. The submission shall consist of two elements: the containment/sedimentation system and the maintenance procedures. 214.03.1 Containment System for Control of Hydrodemolition Runoff . If the project is within the jurisdiction of the Rhode Island Department of Environmental Management (RIDEM) or the Coastal Resources Management Council (CRMC), the containment system must be constructed in accordance with permit conditions and approved plans. Otherwise, the Contractor shall be responsible for obtaining the necessary approvals prior to beginning hydrodemolition activities. Copies of all such approvals shall be provided to the Department.
a.Minimum Requirements . The containment system shall meet the following minimum requirements:
1.It shall be one of the following structures:
a.An open basin formed of natural topography lined with an impermeable fabric.
b.An area where excavated material can be placed to form a temporary earth berm, lined with an impermeable fabric.
c.A manmade, portable structure which can be placed on-site for the duration of the hydrodemolition process.
2.The submittal shall consist of comput ations accompanied by the hydrodemolition equipment’s operating specifications, demonstrating that the sedimentation area is capable of holding the maximum discharge from eight (8) hour s of hydrodemolition operations and a minimum of three thousand (3,000) gallons.
3.The containment system sha ll be located within the available infield(s) of the project, and shall not encroach on the pedestrian or travel ways . The location of the fa cility shall be surrounded by a temporary snow fence to discourage unauthorized entry.
4.If disturbance of the original soil is required for the establishment of the containment system, a row of haybales shall be placed five (5) feet downslope from the edge of disturbance, and shall remain in place through the hydrodemolition process. Subsequent site restoration shall be required. 214.03.2 Maintenance and Dispo sal of Hydrodemolition Runoff . The Contractor shall develop a method by which the temporary sedimentation basin is to be maintained, cleaned and emptied prior to the start of any work. No work within areas of RIDEM or CRMC jurisdiction, or which is outside of approved limits of disturbance, will be authorized by the Engineer.
a.Requirements . The disposal of the liquid and solid discharge elements of the hydrodemolition operations shall conform to the following requirements:
1.The Contractor shall not commence hydrodemolition operations on a given workday until the containment system has been cleaned to the satisfaction of the Engineer.
2.Liquid runoff may be removed and discharged in accordance with RIDEM or CRMC
Source: Rhode Island Standard Specifications (Bluebook), 2024 Edition. Pages 170–171 of 826.