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81h Street Pond Proposal File No. 2223-067 The proposed field exploration program will include the following: Description Number of Depth Below Ground Borings Surface (feet) Pump Station Slab 1 SPT 15 Stormwater Pond 6 Auger 15 -2- The SPT boring will be drilled using truck -mounted drilling equipment and a procedure similar to the Standard Penetration Test outlined in ASTM D-1586. The boring will be sampled at 18 -inch intervals to 10 feet deep and at 5 -foot intervals below 10 feet. The auger borings will be drilled with a 4 -inch diameter, truck -mounted continuous flight auger. Each sample will be removed from the auger or sampler in the field and then examined and visually classified by our crew chief. Representative portions will be sealed and packaged for transportation to our laboratory for further analysis as required. Water level observations will be made in the boreholes during the drilling operation. Upon completion of drilling, the boreholes will be backfilled with soil cuttings. As requested, our field program will also include installing three temporary, 2 -inch diameter PVC groundwater sampling wells at semi -random, accessible locations within the proposed pond area. At least three well volumes of groundwater will be purged from each well and then groundwater samples will be collected for analysis of total nitrogen and total phosphorus. Upon completion of the groundwater sampling, the temporary wells will be removed from the ground and the boreholes will be backfilled with soil cuttings. LABORATORY PROGRAM Routine laboratory visual classification will be performed by a geotechnical engineer along with specific classification tests deemed necessary (i.e., percent fines, organic content). ENGINEERING ANALYSIS AND REPORT Engineering analysis of all data obtained will be made to evaluate general subsurface conditions and to develop engineering recommendations to guide site preparation in the proposed pump station slab on grade area. For our analysis, we will require specific loading conditions for the slab on grade. We will also provide a discussion of the subsurface conditions encountered within the proposed pond area and the results of the groundwater sampling and testing. Our recommendations for the pump station slab area, together with data developed during the exploration, will be submitted in a written report upon conclusion of the study. COST ESTIMATE The costs associated with the aforementioned tasks are as follows: Brush Mowing — 1 day (lump sum): $2,820.00 Subsurface Soil Exploration (lump sum) $5,900.00 Total Estimated Cost: $8,720.00 The total estimated cost presented above will not be exceeded without prior authorization from