Specifications include, but are not limited to: The contractor will implement the amended work plan prepared by INTERA and approved by the New Mexico Environment Department, as included in the Phase II Environmental Site Assessment Report, Former Frank Ortiz Landfill, Santa Fe County, New Mexico, dated July 30, 2018 (attached). The amended work plan includes, but is not limited to, the following required activities: 1. Installation of three groundwater monitoring wells downgradient to the Former Frank Ortiz Landfill Site. The proposed well locations are shown on Figure 2. The new groundwater monitoring wells will be completed as a groundwater monitoring well coupled with permanent soil vapor sampling ports (one shallow, one intermediate, and one deep).; 2. Completion of new groundwater monitoring wells coupled with three soil vapor ports: one shallow, one intermediate, and one deep. To be consistent with the other three on-site soil vapor monitoring wells, the shallow, intermediate, and deep vapor sampling ports will be installed at approximately 10, 30, and 40 ft bgs.; 3. Installation of a soil vapor well with three soil vapor ports (one shallow, one intermediate, and one deep), adjacent to existing groundwater monitoring well, Ortiz Park-1. The shallow, intermediate, and deep vapor sampling ports will be installed at approximately 10, 30, and 40 ft bgs.; 4. Collection of eight soil samples (two per soil boring) during well installation to be analyzed for volatile organic compounds (VOCs), semi-volatile organic compounds (SVOCs), NMED designated metals (arsenic, barium, cadmium, chromium, lead, selenium, silver, uranium, copper, iron, manganese, zinc, aluminum, boron, cobalt, molybdenum, and nickel), polychlorinated biphenyls (PCBs), and nitrate/nitrite. Two (2) soil samples will be submitted to the laboratory for analysis from each soil boring location. In the soil borings completed for groundwater monitoring wells, one soil sample will be collected just below the total depth of the waste and one soil sample collected at the water table interface. For the soil vapor well, one soil sample will be collected just below the total depth of the waste and one soil sample collected at the total depth of the soil boring; 5. Conduct a single initial soil vapor monitoring event following the installation of the soil vapor well collecting soil vapor samples from all Former Frank Ortiz soil vapor wells (4 total soil vapor wells, 3 ports per soil vapor well and three ground water wells with co-located soil vapor probes [3 soil vapor probes per groundwater well]) (21 soil vapor probes total) to test for the presence and concentration of landfill gases (methane and hydrogen sulfide) and VOCs.