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WSB & Associates, In <br />Proposal BL-08-0238 <br />#ctober 9., 2008 <br />Page 2 <br />Penetration Test Borings <br />As discussed, we propose to drill a total of twenty-eight standard penetration test borings for the project <br />along the proposed road (and utility) alignments. The proposed boring depths are listed below. <br />Number of Borings <br />Proposed Depth (feet) <br />18 <br />15 <br />2 <br />20 <br />2 <br />25 <br />6- <br />30 <br />Penetration tests will be performed at 2 1/2-foot vertical intervals to a depth of 15 feet below grade and <br />then at 5-foot intervals to the boring termination depth. <br />If groundwater is encountered in the boreholes, the depth where it is observed will be recorded on the <br />bloring logs. If borings are located within areas that ar� I e currently paved; the approximate pavement and <br />aggregate base (if pre5ent), thicknesses will be measured. <br />Borehiolle Abandonment <br />Due to the presence of relitively shallow groundwater and the potential for encountering <br />environmentally impacted soils, we are planning to backfill all of the boreholes with bent onite' grout. <br />Sea mple Review and Laboratory Testing <br />Samples will be returned to our laboratory where they will be visually classified and logged by a <br />geotelchnical engineer. Laboratory testing will then be Iperformed to assist in evaluating the strength and <br />CoMpressibility of the soils. For our evaluation, we have inclu�ded forty-two 'moisture content, three <br />Atterberg limits,, six sieve analysis and eight organic content tests in our budget. However, actual <br />laboratory tests performed will be dependent on the soils encountered and may vary from those <br />p raw plosied, <br />Reporting and Engineering Analysis <br />Data obtained from the borings and laboratory tests will be used to evaluate the subsurface profile and <br />groundwater conditions, perform engineering analysies related to pavement and utility design and <br />performance, and prepare a report including: <br />A CAD sketch showing the project components and limits, as well as exploration locations. <br />Logs of the borings describing the materials encountered and presenting the results of our <br />groundwater measurements and laboratory tests. <br />M A summary of the subsurface profile and groundwater conditions. <br />Discussions regarding the reuse of on-site matie'rials during construction, and of the impact <br />of groundwater on construction. <br />IRecommenidations for preparing pavement and utility subgrades, excavation depths for soil <br />,corrections if applicable), and the selection, placement and compaction of excavation <br />bilackfill and other structural fill. <br />IN Geotlechniical recornmend'ations for the design of pavements and underground utilities. <br />La I Ilk <br />