DCPZP-2018-00233 - Laserfiche WebLink

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Subsurface Exploration and Foundation Evaluation Proposed Golden Oil Refueling Station • Stoughton, Wisconsin PSI Project No. 0092822 Page 2 southwest and south of the site, there are two towing businesses. The topography of the site is hilly with an elevation difference of approximately 11 feet, sloping down away from the existing buildings. There are areas classified as wetlands on the east side of the site. The existing buildings, pavement, underground tanks, and other associated items will be removed prior to construction. Project Description From the information provided by the architect, it is understood that the proposed project will consist of a one-story structure, without a basement, about 10,500 square feet in plan dimension. Structural loads were not provided, but are estimated to be light to moderate in magnitude. No additional design information regarding the structure was provided. A planned finished floor elevation of EL. 875.0 was shown on the preliminary site plan provided by Keller Construction. The existing grades across the property presently range between about EL. 872.1 and 876.0. Therefore, on the basis of the planned first floor elevation, cuts and fills of about 1 to 3 feet are estimated to be necessary to reach finished grade. However, this will also be dependent on the subgrade preparation criteria, to be discussed in a later section. The pavements for this project are expected to consist of parking lots and drive lanes for passenger vehicles and semi-trucks. It is estimated that the proposed pavement areas will be subjected to relatively moderate to heavy automobile traffic volumes, however traffic loading was not provided. It is understood that an underground stormwater management basin will be located just north of the proposed structure under the asphalt parking lot. The size, type, bottom elevation and other design details were not provided. Underground storage tanks will also be installed but locations and other design details were not provided. EXPLORATION AND LABORATORY PROCEDURES Scope Summary The field and laboratory data utilized in the evaluation and analysis of the subsurface materials was obtained by drilling exploratory test borings, securing soil samples by the split-spoon sampling method, and subjecting the samples to laboratory testing. With respect to the stormwater management area, the field and laboratory work for classification of the subgrade soils was performed to provide information for use by the basin design personnel when considering requirements of Chapter NR151 of the Wisconsin Administrative Code, and of WDNR Technical Standard 1002, "Site Evaluation for Stormwater Infiltration" guidelines. The design of the proposed stormwater management area was beyond the scope of services for this project.