2020-031-E AMS - Summit BOE stormwater mitigation

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DocuSign Envelope ID:216C4FOB-B6EC-41B3-B861-9632C4A197DD Proposal for Waterproofing and Building Exterior Consulting Services Four(4)Orange County Facilities Prepared for Summit Design and Engineering Services Prepared by Atlas Engineering-Project No.:J2405 January 8,2020-Page 2 Recreation Building and northeast corner of the Orange County Dental Clinic at the Whitted Complex; the exterior walls in the below-grade basement of the Board of Elections; the north east corner of the Sheriff's Office in the uniform storage room; and the north and west sides of the Public Transportation Building. Perform fieldwork to evaluate areas of isolated damage to building exteriors. Reported areas of exterior damage include the brick veneer infill over the entrance to the Central Recreation Building and at the walls near the northeast corner of the Orange County Dental Clinic at the Whiffed Complex. As a part of our fieldwork, Atlas will evaluate exterior wall and roof conditions above/adjacent to water intrusion or damage locations to determine if other exterior wall or roof conditions may be contributory.Atlas will access roof areas with hatches or permanent ladders,or will provide our own extensions ladders (up to a 40' extension ladder) for access. Where access cannot be obtained by these means, Atlas will communicate with Summit Design and can view these areas utilizing either our unmanned drone, or by a manlift provided by others. Fieldwork at each site will be divided into Initial and Final fieldwork. Initial fieldwork will be used to gather measurements, investigate interior conditions, investigate existing wall and waterproofing conditions/construction,observe adjacent roof and exterior wall conditions,and obtain other information as needed to evaluate the potential causes of the water intrusion and necessity of waterproofing repair or installation and to create design details and specifications for repairs. Atlas will return to the sites as needed for Final fieldwork following coordination meetings with Summit Design to confirm the intended storm water drainage repairs and other site improvements for each site and the determine the impact on exterior walls/below-grade waterproofing. Fieldwork is anticipated to include hand digging adjacent to building exterior walls to expose representative portions of existing waterproofing.Based on initial observations, destructive test cuts at masonry walls may not be necessary. If during initial fieldwork, Atlas determines that masonry test cuts may provide critical information necessary for evaluation or design, we will communicate directly with Summit Design to coordinate this work. We recommend that a contingency be included in Summit's design fees to cover the cost of this potential destructive testing. The Owner has reported issues with high moisture content in concrete slabs and associated issues with flooring finishes within the interior of two buildings (Central Recreation Center and Dental Clinic at the Whitted Complex). Evaluation of the soil conditions beneath the flooring,slab moisture content,and repair options is outside of the scope of our services.Atlas will investigate general exterior wall and waterproofing near areas with under slab moisture to determine whether there are any potential contributory conditions and will provide associated information to Summit to assist in their evaluation of flooring issues. 3. SD/Design Development Phase (25% Construction Documents): Atlas will meet with Summit Design following completion of initial fieldwork to discuss on-site observations and anticipated scope options. At this phase, Atlas will utilize aerial photos, field sketches, field photos, and building plans to communicate project scope with Summit Design. Drawings and specifications will not be submitted at this phase, however, Atlas can provide a written summary of our evaluation and recommendations for inclusion in a SD/DD phase submittal. 4. Construction Documents (75%): Submit 75% Construction Document including drawing sheets for each of the facilities indicating the locations and extents of waterproofing and building exterior repairs and a portion of the design detailing. Technical specification sections for recommended waterproofing and exterior repair materials will be included in the submittal. These documents will be provided to Summit in electronic format(.pdf). Atlas will coordinate