abredeensettlementinvestigation

Consulting Geotechnical Engineers Environmental Science Construction Management & Inspection Construction Materials Testing Hydrogeology/Groundwater Monitoring Earth Instrumentation Services

5871 New Peachtree Road Doraville, GA 30340-1084 Phone: 770/457-9776 Fax: 770/457-9964

CCG

Chattahoochee Consulting Group, Inc.

November 28, 2016 Project Number: 4754.002.16

Engineered Solutions of Georgia 2260 Northwest Parkway Suite H Marietta, GA 30067

Attention: Mr. Chuck Irby

RE: Report of Geotechnical Exploration The Aberdeen on Paces Ferry 2700 Paces Ferry Road Vinings, Georgia

Gentlemen:

Chattahoochee Consulting Group, Inc. (CCG) is pleased to present this proposal for geotechnical engineering services.

PROJECT BACKGROUND

We understand that the high-rise condominium structure was completed in 2009 and is primarily supported on pile foundations based on a review of the structural drawings for the building. Based on our visual observations, apparent settlement is evident primarily along the front, northeast portion of the building. Outward deflection of the free-standing retaining wall structures within this area, as well as distress of the pavements between the loading dock and lower parking garage was noted, including the areas around the two drop inlet structures. Additionally, significant distress was noted at the entrance of the lower parking garage and the adjacent electrical room enclosed by masonry walls. Our review of the architectural plans prepared by Smallwood, Reynolds, Stewart, Stewart and Associates, Inc. and the structural plans prepared by Stanley D. Lindsey, Ltd., indicate that the front (north) and the front portion of the east side wall of the electrical room are supported by a foundation wall which is not pile supported, (see Figure 3). Additionally, a below grade storm water detention vault, 16 feet deep, is present below the parking deck near this area. It appears that the settlement observed is due to consolidation of the backfill soils in this area. Review of the report from a ground penetrating radar (GPR) investigation, performed by GPRS, Inc. dated May 7, 2016, reported several areas