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Farmington Groundwater Recharge Program STC Work Plan—Hammer Site 2. METHODOLOGY This section describes methods to be followed by program participants during implementation of field investigation activities. Initial field reconnaissance has begun at the site and methodology will be described in this section for the following tasks: • Drilling; • Borehole percolation testing; • Monitoring well construction; • Source and groundwater sampling; and • Recharge testing. 2.1. Initial Field Reconnaissance The objective of the initial field reconnaissance stage is to obtain environmental clearance at the site and prepare for the first field data collection stage to ultimately obtain quantitative site recharge performance data. An initial landowner meeting and site inspection was the first task conducted as part of the initial field reconnaissance stage. This initial landowner meeting and site inspection was conducted to assess landowner willingness to participate in the program, to evaluate general site feasibility, and to identify the presence of any "Fatal Flaws" at or near the site. Results from this landowner meeting and site inspection determined the adequacy of the site for the purposes of conducting field investigation activities. This meeting and inspection however, did not provide quantitative recharge performance data. A record of this initial landowner meeting and site investigations is documented in "Initial Field Record (Landowner Meeting—Hammer Site), April 20, 2004" (MWH, 2004). As part of the above-mentioned landowner meeting and provided in the Initial Field Record were, initial field observations including preliminary identification of potential soil or water quality concerns, analysis of surficial soil deposits and geologic features, observation of current and historical groundwater elevation data, potential water sources and conveyance structures, historical land use, accessibility and existing structures, and utilities and underground improvements were conducted. To augment this information, the next tasks under the initial field reconnaissance stage are included in the following sections. 2.1.1. Conduct Environmental Site Assessment An environmental site assessment (ESA) will be conducted at the site to determine if any environmental conditions exist at the site which would be affected during field investigation activities. The ESA includes an evaluation of historical aerial photos, regulatory database review, environmental permitting, and regional existing well completion data. The ESA document will assist in determining if the site or any adjacent properties within the vicinity of the site pose a"recognized environmental condition"(REC). MWH 2-1 July 2004