Task 1: Site Clearing - Surveying, clearing, grubbing, grading and removal of debris for the fence line or any required clear areas adjacent to the fence. The entire site was cleared in Fall, 2023. However, between then and the time of this RFP, vegetation has grown back over most of the site. Approximately 0.26 acres of the site is required to be cleared. Task 2: Earthwork - Earthwork includes proper grading and excavation for underground stormwater systems, utilities, electrical, power, and buried conduits In Fall, 2023, approximately 600 cubic yards of material were removed from the site (616.29 tons of impacted soil, 93.01 tons of asphalt, and 13.29 tons of stumps). At this time, no additional soil exports are required from onsite, however, up to 100 cubic yards of soil may need to be removed from the site. Additionally, 25 cubic yards of concrete and 50 cubic yards of material below the sidewalks remain to be removed and disposed of at a licensed off-site facility, should this material not be able to be reused onsite. Targeted excavation was completed to remove soil impacted with petroleum hydrocarbons at concentrations above RIDEM Method 1 Industrial/Commercial Direct Exposure Criteria (I/CDEC), and/or GB Leachability Criteria (GBLC). Remaining soil at the site contains PAHs and lead at concentrations above RIDEM Method 1 Residential Direct Exposure Criteria (RDEC) and I/CDEC. If additional soil is removed from the site, it shall be disposed of off-site to a licensed disposal facility. Should the material remain on site, it will ultimately be covered with an engineered barrier (See Tasks 6, 7, and 8) consisting of the following: ● 2 feet of clean fill ● 1 foot of clean fill over a geotextile barrier (TerraTexNOe, SRW LSe, or similar “Class” 3” geotextile per AASHTO M2880-06) ● Asphalt pavement; and/or ● Concrete pads. Soil at the site will need to remain in the general area from which it came during construction to avoid needing to recharacterize soil if it is generated for disposal. If soil is generated for disposal, it needs to come from the eastern portion of the site. Soil disposal will be coordinated by the environmental consultant. Sedimentation and erosion controls will need to be in place to ensure that soil is not tracked off site during construction and dust suppression must be employed at all times during all soil disturbing/handling activities at the site in order to minimize the generation of fugitive dust. - See Task 3. Fill materials imported to the site will need to be sampled prior to importing. This will be completed by the environmental consultant, and it is the responsibility of the contractor to coordinate importing of fill materials with the environmental consultant. - See Task 6.
