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<br />Work Authorization No. 85 <br />September II, 2006 <br />Calvin, Giordano & Associates, Inc. Proposal No. 03-4122.4 <br /> <br />CITY OF SUNNY ISLES BEACH <br />Central Island Drainal!:e & Street Improvements <br />Hvdrol!:eolol!:ical Investil!:ation <br /> <br />PROJECT DESCRIPTION: <br /> <br />1. SCOPE OF SERVICES <br /> <br />Task I - Project Startup <br /> <br />· Project setup and invoicing, coordination with subcontractors and, as necessary, with the <br />Client, the property owner, the site contact and other parties identified by the Client. <br />· On-site meetings with the Client to determine acceptable test hole locations. <br />· Coordination and on-site meetings with representatives of public utilities through <br />Sunshine One-Call and City utility representatives to ensure that the test hole locations are <br />clear of underground utilities. <br />· Time for securing permits from the City or Miami-Dade County to drill in the rights-of- <br />way. <br /> <br />Task 1 can be completed within three weeks, depending on our number and nature of the <br />required permits and the time required to secure underground clearance. <br /> <br />Task 2 - Field Activities <br /> <br />Reasonable Assurance Report - A 7-inch diameter test hole is proposed to 150 ft. below land <br />surface (bls). Continuous samples will be collected of the soil and rock. Water quality <br />samples at approximately 10-ft intervals will also be collected for field measurement and <br />laboratory analysis of total dissolved solids. <br /> <br />A description of the geology in the field will be recorded, making particular note of intervals <br />of hard, dense or cemented rock that might act as semi confining layers to prevent the vertical <br />migration of injected storm water. The TDS concentration will be measured with a field meter <br />to estimate the depth at which the concentration exceeds 10,000 parts per million (ppm). <br /> <br />Specific Capacity Tests - At least one specific capacity test will be conducted in a potential <br />production zone in each test hole, at depths below which the criteria for reasonable assurance <br />are satisfied. The interval at which the hole will be grooved to the bottom of that interval and <br />set the well casing at the top of that interval. The specific capacity test will be a step- <br />drawdown test, which consists of pumping groundwater and monitoring the flow rate, the <br />drawdown, the elapsed time and the recovery time, and then pumping the groundwater at a <br />higher flow rate, with the same kind of monitoring. <br /> <br />P:\Proposals\2003 Additional SelVices\03-4122.4 SIB Hydrogeologicallnvestigation.doc <br /> <br />SIB <br />