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City of Centerville <br /> Project SP-07-03738 <br /> November 29,2007 <br /> Page 5 <br /> B.4. Laboratory Test Results <br /> Results of our laboratory tests are presented below in Table 3. <br /> Table 3. Laboratory Classification Test Results Summary <br /> Moisture Percent Organic <br /> Boring Sample Depth Content Passing a#200 Content <br /> Number (110 Classification (%) Sieve (%) <br /> ST-1 5 Sc 16 43 — <br /> ST-1 10 SC 14 41 — <br /> ST-3 21/2 CL 25 — 9 <br /> ST-37 21/2 SC 15 43 — <br /> Just below <br /> ST-00 aggregate base SP-SM 5 10 — <br /> ST46 71/2 SC 14 39 — <br /> ST-55 71/2 SC 14 43 — <br /> B.S. Groundwater Measurements <br /> Groundwater was observed at Borings ST-3,ST-14,ST-44 and ST-53 at depths ranging from 5 to 10 feet <br /> below the existing ground surfaces. Given the lack of consistent groundwater information,and the <br /> variable and generally fine-grained composition of the site's soils,it is our opinion that perched <br /> groundwater conditions exist(and likely develop periodically and/or seasonally)across the site, This, <br /> again,is largely due to the texturally layered soil strata ranging from relatively free-draining sand to <br /> nearly impermeable clay. <br /> C. Evaluation and Analyses <br /> C.I. Design Details <br /> C.l.a. Proposed Construction <br /> Bonestroo,Inc.,provided us with a list of materials and their proportions that are incorporated into the <br /> City Standards for street design in the City of Centerville. Those materials,beginning at the ground <br /> surface,are: <br /> 1 1/2 inches of bituminous wear course. <br /> 2 inches of bituminous base course <br /> 40 <br />