The Contractor shall perform environmental and engineering services for the purposes of landfill inspection, as provided in the City landfill Closure Plan or mandated by the regulators. Services provided will include quarterly inspections, investigation, and monitoring at the former Ortiz Landfill and the Paseo de Vista Landfill. It is important to note that the Former Frank Ortiz Landfill is regulated under a Stage 1 Abatement Plan that is administered by the New Mexico Environment Department (NMED) Ground Water Quality Bureau. The Paseo De Vista Landfill is regulated under NMED Solid Waste Bureau Solid Waste Management Regulations. The described work plans will guide, but not limit, the activities required. The regulators may reduce requirements or add additional requirements for managing both closed landfills. a) Continued Stage 1 Abatement Plan Investigation The contractor will implement the amended work plan approved by the New Mexico Environment Department, as included in the Sampling and Analysis and Quality Assurance Project Plan Waste and Vadose Zone Characterization Revision 3.0 dated November 6, 2019, and Stage 1 Abatement Plan Modification Surface Emissions Monitoring Activities dated September 23, 2021 (both attached). These work plans will guide, but are not limited to, the following activities: 1. Installation of one groundwater monitoring well (Ortiz Park-5) upgradient of the Former Frank Ortiz Landfill Site, in the northeastern portion of the current Ortiz LF Dog Park. The proposed well location is shown in Figure 1. This monitoring well will be completed as a 4-inch nominal polyvinyl chloride (PVC) permanent groundwater monitoring well with approximately 30 feet (ft) of saturated screen (10 ft below the interpreted water table and 20 ft above). 2. Complete a groundwater gauging event in which depth to water is gauged at the five Ortiz LF groundwater monitoring wells. 3. Conduct an initial groundwater monitoring event, collecting samples from all groundwater monitoring wells (5 total), and analyzing for volatile organic compounds (VOCs), semi-volatile organic compounds (SVOCs), NMED-designated metals (i.e., arsenic, barium, cadmium, chromium, lead, selenium, silver, uranium, copper, iron, manganese, zinc, aluminum, boron, cobalt, molybdenum, and nickel), PCBs, and nitrate/nitrite. This initial groundwater monitoring event will be conducted concurrently with the semi-annual groundwater monitoring event and the data will be included as part of this semi-annual report.
