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12 / 20 / 2004 23 : 19 772 - 343 - 9404 DET PSL PAGE 03 <br /> Indian River County Page 2 <br /> Proposal No. P0441 � 1726 <br /> The proposed grade line (PGL) will range from slightly above (3 inches) to 1 '/4-feet above the <br /> existing grade line. <br /> M. addition to the proposed roadway, a f2-acre pond will be excavated at the northwest corner of <br /> Oslo Road and 2CP Avenue. According to Mr. Brian Good, P.E., the pond will extend from the <br /> north side of the Oslo Road and 2& Avenue right-of--ways. <br /> SCOPE OF STUDY <br /> Our work for this project will consist of five (5) primary components. <br /> 1 _ Exploration of the shallow subsurface conditions along the proposed roa& .way using borings <br /> advanced by hand-turned augering equipment to a depth of approximately b feet below the <br /> existing ground surface. We plan to perform ten ( 10) auger borings at about 250400t <br /> centers. The borings will be positioned at staggered locations within the 3 Moot wade stretch <br /> along the north side of the existing pavement, including a few on the south edge of the <br /> existing pavement. <br /> Groundwater levels will be measured in each borehole upon its completion, and again after <br /> an approximate 24-hour period to allow the water table tame to stabilize. <br /> 2. Two (2) Standard Penetration Test (SPT) borings will be drilled in accc:ssible areas at the <br /> proposed f2-acre pond location. Each of the SPT borings will be drilled to a depth of 25 <br /> feet below the existing ground surface using a conventional truck�motmted drill . rig and <br /> utilizing mud rotary procedures. For each SPT boring, samples of the mi ppaace soils will be <br /> recovered at frequent vertical intervals using a standard split-barrel driver. . with a 140-pound <br /> hammer freely falling 30 inches (Standard Penetration Test per ASTM D 1586). <br /> 3 . Lalxrratory examination (classification) of the recovered material samples and physical <br /> property tests of same to establish their gradation, organic content, and moisture content. <br /> The results of the laboratory tests will be used for soil classification and to determine <br /> relevant engineering properties such as strength and compressibility. <br /> 4. Evaluation of the geotechnical suitability of the inn-situ materials fo:r use as roadway <br /> embankment and subgrade, borrow (pond) suitability, estimating a design Limerock Bearing <br /> Ratio (LDR) value, and projecting wet season water levels . <br /> 5 . Submittal of an engineering report transmitting the factual infonnation gathered including <br /> dratted cross-sectional profiles of, the subsurface conditions with AASHTO soil <br /> classifications. The report will present recommendations pertaining to in�mtu soil suitability, <br /> embankment construction and pavement drainage. The report will be prepared following <br /> l:DOT's "Soil Survey" guidelines with the drafted cross-sectional pro Files in AutoCAD <br /> Version 2004 format for inclusion on the roadway cross-section drawing;;. Boring locations <br /> VIEE ■ <br />