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City of Ramsey <br />Project B1705491 <br />August 11, 2017 <br />Page 14 <br />F. Qualifications <br />F.1. Variations in Subsurface Conditions <br />F.1.a. Material Strata <br />Our evaluation, analyses and recommendations were developed from a limited amount of site and <br />subsurface information. It is not standard engineering practice to retrieve material samples from <br />exploration locations continuously with depth, and therefore strata boundaries and thicknesses must be <br />inferred to some extent. Strata boundaries may also be gradual transitions, and can be expected to vary <br />in depth, elevation and thickness away from the exploration locations. <br />Variations in subsurface conditions present between exploration locations may not be revealed until <br />additional exploration work is completed, or construction commences. If any such variations are <br />revealed, our recommendations should be re-evaluated. Such variations could increase construction <br />costs, and a contingency should be provided to accommodate them. <br />F.1.b. Groundwater Levels <br />Groundwater measurements were made under the conditions reported herein and shown on the <br />exploration logs, and interpreted in the text of this report. It should be noted that the observation <br />periods were relatively short, and groundwater can be expected to fluctuate in response to rainfall, <br />flooding, irrigation, seasonal freezing and thawing, surface drainage modifications and other seasonal <br />and annual factors. <br />F.2. Continuity of Professional Responsibility <br />F.2.a. Plan Review <br />This report is based on a limited amount of information, and a number of assumptions were necessary to <br />help us develop our recommendations. It is recommended that our firm review the geotechnical aspects <br />of the designs and specifications, and evaluate whether the design is as expected, if any design changes <br />have affected the validity of our recommendations, and if our recommendations have been correctly <br />interpreted and implemented in the designs and specifications. <br />F.2.b. Construction Observations and Testing <br />It is reLu.Ifl ie .ded that we be retained to perform observations and tests during construction. This will <br />allow correlation of the subsurface conditions encountered during construction with those encountered <br />by the borings, and provide continuity of professional responsibility. <br />BRAUN <br />INIERItC <br />