Agmt09 Fugro West, Inc - Laserfiche WebLink

Browse Search

.. , " , City of Redwood City February 6, 2009 (Proposal No. 09.027) PROPOSED SCOPE OF SERVICES Fugro proposes to conduct a subsurface geotechnical drilling and sampling program, laboratory testing, and the preparation of a geotechnical design report concurrent with our environmental investigation. The scope of services and costs of our environmental study are submitted under a separate proposal. The geotechnical investigation will be conducted using standard industry practices for worker health and safety, as well as for sample handling and docu mentation. PRE-FIELD ACTIVITIES Fugro will review pertinent published and available geotechnical and geologic information in the specific area of the project. We will also coordinate with the environmental group to mark the proposed boring locations, notify Underground Service Alert (USA), and contract a private utility locator to clear the proposed boring locations. The boring locations proposed below may be moved pending the results of the utility survey. Fugro will also procure the necessary drilling permit from San Mateo County Environmental Health Department for the proposed locations, and coordinate with the City and County during the field exploration. SUBSURFACE STUDY Based on the project plans provided to us, we have determined that a total of three exploratory borings would be appropriate for the proposed development. In addition, one of these borings would be advanced to a depth of 50 feet, in accordance with CGS liquefaction evaluation guidelines. These borings would be drilled by conventional drilling equipment across the project site and two of the borings will be advanced within the footprint of the previous basement area. Our proposed boring locations and initially planned depths are summarized below. The depth of individual borings may be adjusted according to the materials encountered during drilling. Boring Location Boring Depth (feet) B-1 (Near the SWend of the property) 25 B-2 (Near the center of the property) 20 B-3 (Near the NE end of the property) 50 TOTAL LENGTH OF BORINGS: 95 Subsurface exploration will be conducted under the direction of our field engineer who will supervise, log, and collect samples from the borings. Standard penetration resistance will be determined in the borings at appropriate increments. Relatively undisturbed samples may also be recovered from various depths in the borings using the Modified California Sampler, as appropriate, to help determine strength and compressibility characteristics of the subsurface materials, particularly in clayey soils. We will also use a nuclear gauge to measure in-place density at the surface of the basement fill area, as practical. G:IPROPOSED WORK\2009\09027 -611 HELLER ST, REDWOOD CITY\GEOTECHIPROPOSAL GEO-6FEB09.DOC 2