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. TRINITY ENGINEERING/KLEINFELDER (l\\/lf'(1 July 19, 200 1 Ms. Laurie Anderson, P.E. City of San Marcos Department of Environment & Engineering 630 East Hopkins San Marcos, Texas 78666 Reference: Geotechnical Investigation Cottonwood Creek Wastewater Line Improvements San Marcos, Texas Dear Ms. Anderson: We are pleased to submit this proposal and fee estimate to provide the Geotechnical Investigation for the Cottonwood Creek Wastewater Improvement Project. This letter describes our understanding of the project scope and our proposed geotechnical engineering services. The work scope presented herein was developed based on our recent conversations, and preliminary project plans provided by Freese and Nichols, Inc. and Byrn & Associates, Inc. Project Information: It is our understanding that the wastewater line improvement project will consist of four separate lines, namely; Line "A", Line "B", a 18-inch force main, and a 24-inch gravity line. The total length of the wastewater line is approximately 5% miles, extending north from the factory outlet mall to the Fish Hatchery. Lines "A" and "B" are being designed by Byrn & Associates Inc. and Freese and Nichols, Inc. (FNI) is designing the force main and gravity lines. In addition, two lift stations will be constructed, which will also be designed by FNl Lift Station No. 1 will be located at the intersection of the Line "A" and the IS-inch force main. Lift Station No.2 will tie the east end of the gravity line to the existing wastewater line located south of the Fish Hatchery. Although this project will be under a single contract, to simplify the process we propose to submit two separate reports. The first report will pertain only to the line boring locations and will be limited to discussing the general soil stratigraphy and local geotechnical concerns observed. The contractor is responsible for the design of trench excavation and safety measures. The second report will be limited to the lift station locations. Within this report, specific design and construction criteria will be presented for each lift station, small eMU building, precast vault, and concrete pavement. Previous Experience: Our firm has conducted numerous investigations in the vicinity of the project alignment. Several of these previous projects have been reviewed in order to better familiarize ourselves with the local soils conditions and overall geology. Noteworthy projects are the outlet mall located south of the project, the Fish Hatchery and San Marcos High School. Thick deposits of expansive clay and shale were observed at each project site. 61~3~13IPI53 Copyright 200 1 Kleinfelder, Inc. 3601 ,\\anor Road . Austin, Texas 78723 . !512) 92&-6650 . (512) 926-3312 fax