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Opportunity Zone Development LLC JN 19152
<br />June 9, 2019 Page 4
<br />foundation wall. A specific elevation of the bottom of the adjacent building's footing, its weight, as
<br />well as Its offset from the proposed shoring/foundation walk, will be needed to determine an
<br />appropriate surcharge bad.
<br />The eroskm control measures needed during the site development will depend heavily on the
<br />weather conditions that are encountered. We anticipate that a sift fence Will be needed around the
<br />downslope sides of any cleared areas. Existing pavements, ground cover, and landscaping should
<br />be left In place wherever possible to minimize the amount of exposed soil. Rocked staging areas
<br />and construction access roads should be provided to reduce the amount of soil or mud carted off
<br />the property by trucks and equipment. Wherever possible, the access roads should follow the
<br />alignment of planned pavements. Trucks should not be allowed to drive off of the rock -covered
<br />areas. Cut slopes and soil stockpiles should be covered with plastic during wet weather. Following
<br />clearing or rough grading, it may be necessary to mulch or hydroseed bare areas that will not be
<br />immediately covered with landscaping or an impervious surface. On most construction projects, it is
<br />necessary to periodically maintain or modify temporary erosion control measures to address
<br />specific site and weather conditions.
<br />The drainage andfor waterproofing recommendations presented In this report are intended only to
<br />prevent active seepage from flowing through Concrete walls or slabs. Even in the absence of active
<br />seepage into and beneath structures, water vapor Can migrate through walls, slabs, and floors from
<br />the surrounding soll, and can even be transmitted from slabs and foundation walls due to the
<br />concrete curing process. Water vapor also results from occupant uses, such as cooking, cleaning,
<br />and bathing. Excessive water vapor trapped within structures can result in a variety of undesirable
<br />Conditions, Including, but not limited to, moisture problems with flooring systems, excessively moist
<br />air within occupled areas, end the growth of molds, fungi, and other biological organisms that may
<br />be harmful to the health of the occupants. The designer or architect must consider the potential
<br />vapor sources and likely occupant uses, and provide sufficient ventilation, either passive or
<br />mechanical, to prevent a build up of excessive water vapor within the planned structure.
<br />As with any project that involves demolition of existing site buildings and/or extensive excavation
<br />and shoring, there is a potential risk of movement on surrounding properties. This can potentially
<br />translate into noticeable damage of surrounding on -grade elements, such as foundations and
<br />slabs. However, the demolition, shoring, and/or excavation work Could just translate into percetmal
<br />damage on adjacent properties. Unfortunately, it is becoming more and more common for adjacent
<br />property owners to make unsubstantiated damage claims on new projects that occur close to their
<br />developed lots. Therefore, we recommend making an extensive photographic and visual survey of
<br />the project vicinity, prior to demolition activities, installing shoring, and/or commencing with the
<br />excavation. This documents the Condition of buildings, pavements, and utilities in the immediate
<br />vicinity of the site in order to avoid, and protect the owner from, unsubstantiated damage claims by
<br />surrounding property owners. Additionally, any adjacent structures should be monitored during
<br />demolition and Construction to detect soil movements. To monitor their performance, we
<br />recommend establishing a series of survey reference points to measure any horizontal deflections
<br />of the shoring system. Control points should be established at a distance well away from the walls
<br />and slopes, and deflections from the reference points should be measured throughout Construction
<br />by survey methods.
<br />Geotech Consultants, Inc. should be allowed to review the final development plans to verify that the
<br />recommendations presented in this report are adequately addressed in the design. Such a plan
<br />review would be additional work beyond the current scope of work for this study, and it may include
<br />revisions to our recommendations to accommodate site, development, and geomahnical
<br />constraints that become more evident during the review process.
<br />OEOTECH CONSULTNJrS, INC.
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