2.2 Remedial design for soil excavation and off-site disposal Potentially utilizing a push-probe rig to collect soil samples saturated with free product and analysis of the soil samples for treatability testing and treatment recipes to inform RD development. Excavation of a combined total of approximately 3,500 tons of impacted soil from the areas of monitoring wells PZ-03E and PZ-03H (see Soil Quality Map, Figure 6, from May 3, 2022 Summary Report of Supplemental Site Investigation – PZ-03 Area). Disposal of impacted soil at a Subtitle C (hazardous waste) landfill, with the more impacted and NAPLsaturated (at depth) soil potentially requiring treatment (based upon treatability testing specified above) prior to disposal. Application of aerobic microbes to enhance bioremediation of groundwater impacts exceeding the Enforcement Standard (ES) for naphthalene in the areas of piezometer PZ-03E and PZ-03H, upon completion of the soil remediation. Development of a groundwater monitoring plan that will document the effectiveness of the remedial actions. 2.3 Development of remedial action bid specifications Upon RD completion and approval by EPA and DNR, use the RD to assist DNR in developing bid specifications to enable the proposed work to be bid and contracted by DNR as soon as possible upon the allocation of funding for the remedial work. This will include a Request for Proposal (RFP) document(s), per DNR contracting requirements. For the purposes of this RFQ, firms should assume that there will be one RFP for all soil and groundwater remedial work and post-remedial groundwater monitoring. However, multiple RFPs may be needed. The consultant that prepares the RD discussed above will be responsible for all technical aspects of the RFP document, with DNR approval, and DNR will be responsible for all contractual-related aspects of the RFP document.
