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City of Elk River <br />Proposal SG-11.00955 <br />March 2, 2011 <br />Page 2 <br />Depending on access requirements, ground conditions or potential utility conflicts, our field crew may <br />after the exploration Locations from those proposed to facilitate accessibility. <br />Prior to dri(iing or excavating, we will contact Gopher State One Call and arrange far notification to the <br />appropriate utility vendors to mark and clear the exploration locations of public underground utilities. <br />You or your authorized representative are responsible to notify us before we begin our work of the <br />presence and location of any underground objects ar private utilities that are not the responsibility of <br />public agencies. <br />Aenetration Test Borings <br />You requested we drill 7 standard penetration test borings for the buildings, We propose to extend each <br />boring to a depth of 20 feet. You also requested we driii 3 borings within the pavement area, extending <br />each boring to a depth of 15 feet. Penetration tests wiii be performed at 21/2-foot vertical intervals to <br />the termination depths afthe borings. <br />if groundwater is encountered in the boreholes, the depth where it is observed wiii be recorded on the <br />boring logs. <br />If existing fill, organic materials or other structurally unfavorable soils are oat penetrated above the <br />intended boring termination depths, we wiii extend the borings to obtain at least five feet of penetration <br />into more competent materials at greater depths, The additional information wiii help evaluate such <br />issues as excavation depth, consolidation settlement, and foundation alternatives, among others, If <br />deeper borings {ar additional borings} are needed, we wiii contact you prior to increasing our total <br />estimated drilled footage and submit a Change iJrder summarizing the.anticipated additional effort and <br />the associated cost, for your review and authorisation: <br />Borehole Abandonment <br />Minnesota Well Code requires sealing of any boring ar core that encounters groundwater and is either <br />greater than 25 feet deep or penetrates a confining layer. We currently do not anticipate having to seal <br />any of the borings. <br />Sample Review and laboratory Vesting <br />Soli samples wiii be returned to our laboratory, where they wiii be visually classified and logged by a <br />geotechnica! engineer. To help classify the materials encountered and estimate their engineering <br />properties, we have budgeted to perform 2 mechanical analyses (through a t#200 sieve only}. <br />Reporting <br />Bata obtained from the borings and Laboratory tests wil! be used to evaluate the subsurface profile and <br />groundwater conditions, perform engineering analyses related to structure design and performance and <br />prepare a report, including: <br />^ A CAD sketch showing project components, limits, and exploration locations. <br />~,1~~ <br />~~~~~~ <br />