The URL can be used to link to this page

Home My WebLink Aboutexhibit7• • • December 21, 2004 Metric Engineering, Inc. 13940 S.W. 136 Street, Suite 200 Miami, FL 33186 Attention: Mr. Manuel A. Sauleda, P.E. Chief Highway Engineer Reference: Proposal Request for Hydrogeological Services City of Miami NE 71st Street Drainage Improvements FOR METRIC ENGINEERING, INC. Dear Mr. Sauleda: 1.0 Background and Objective URS Corporation is pleased to provide this proposal to provide hydrogeological services in connection with the drainage improvement project in the vicinity of NE 71st Street, Miami. Recent modifications in the requirements for Class V stormwater injection wells now require a report to provide reasonable assurance that the operation of the stormwater injection well will not adversely affect G-II groundwater (<10,000 mg/L of total dissolved solids) or nearby surface water. Some of the requirements stated in the regulation, such as "sufficient confining or semi - confining strata" cannot be met, as they simply do not exist in many of thecoastal areas of Miami -Dade County. Since the inception of this requirement, the Florida Department of Environmental Protection (FDEP) has been attempting to reconcile natural conditions, intent of the regulations and effects on development, health and environment. As such, FDEP has expressed a willingness to evaluate how best to satisfy the regulatory requirements. The initial interpretations of the stormwater injection well requirements by FDEP have been to provide a report detailing the geology of the area and obtaining water quality samples to establish the depth at which the transition between the G-II and G-III groundwater. This has been performed by installation of a test well, using coring procedures to obtain geologic samples and obtain water quality information. Costs for URS Corporation 7850 Corporate Center Drive, Suite 401 Miami, FL 33126-1220 Tel: 305.884.8900 Fax: 305.884.2665 URS December 21, 2004 Metric Engineering, Inc. Proposal — Hydrogeological Services City of Miami NE 71' Street Drainage Improvements this activity are estimated to be $14,350.00. This would be the worst case scenario. There may be an acceptable alternative to this activity. The area for the proposed improvements has already been identified in USGS technical publications as a zone where salt -water intrusion from Biscayne Bay has severely affected groundwater quality. The thickness of the G-H component may be very thin, possibly in the order of twenty to thirty feet. It is possible that collection of groundwater samples during the drilling activities at selected wells may provide the information to show that the injection at the design depth would be into the G-III zone and would not have an adverse effect on G-II class groundwater or nearby surface water. In conversation with the FDEP, they have indicated that this methodology may be appropriate at coastal installation, but each plan must be site -specific, A Proposed Work Plan needs to be provided to FDEP for their approval prior to any field activities, 2.0 Scope of Work In order to satisfy FDEP's requirements, URS proposes the following tasks. 2.1 Communications with FDEP and preparation of Proposed Field Plan URS will contact Mr. Joseph May, the FDEP underground injection control (UIC) program manager to discuss the site conditions, proposed stormwater management system improvement and site -specific alternatives available. URS will prepare a Proposed Field Plan that will provide supporting documentation obtained from current publications on the geology and hydrogeology of the area. The plan will also detail the stormwater injection well installation procedures (provided by Metric Engineering), groundwater sampling methods, field testing and laboratory analyses that will be performed. The Proposed Field Plan will be provided to Metric Engineering for review and comment prior to submittal to FDEP. Depending on the methods the Metric Engineering has selected for the installation of the stormwater injection wells, URS will propose methods to collect representative groundwater samples at different intervals These samples would be tested in the field using a salinity/conductivity/temperature probe to characterize the aquifer as G-[I or G-III. As conductivity/salinity measurements are only approximations of total dissolved solids (TDS) content, samples will also be collected for laboratory analyses to confirm the actual TDS content and to precisely correlate the field readings of conductivity/salinity with the natural TDS. URS will respond to any technical comments that FDEP may have, in order to obtain an approved work plan. Upon receipt of FDEP's approval, URS will coordinate with Metric • URS • December 21, 2004 Metric Engineering, Inc, Proposal — Iiydro geological Services City of Miami NE 71' Street Drainage Improvements Engineering to perform the sample collection during the installation of the stormwater injection wells. If FDEP does not approve the Proposed Field Plan or includes additional tasks, a revised cost proposal will be provided to Metric Engineering. 2.2 Implementation of the Field Plan URS will provide field personnel for the collection of groundwater samples during the installation of the stormwater injection wells. For the purposes of this proposal, it is estimated that it will require one day per well. Three samples from each of the two wells will be retained for laboratory analyses for TDS. 2.3 Reporting Upon completion of the field activities and receipt of the laboratory analyses results, URS will evaluate the results to find if the stormwater injection wells will have an adverse impact on the groundwater or surface water quality, A draft report summarizing the -Endings and providing reasonable assurance (if concluded) will be provided to Metric Engineering. 3.0 Schedule The schedule for the above scope of work is estimated as follows: • Contact with FDEP and preparation of the Proposed Work Plan: One week from contract approval. • Review by FDEP: to be arranged, but estimated to be between two to four weeks. • Field activities — to be performed during the installation of the stormwater injection wells, estimated at two working days. • Laboratory analyses: standard turn around time is five to seven working days. • Analyses of the data and report preparation: one week. 4.0 Fees URS proposes to perform the above scope of work on a Time and Expense basis, in accordance with the attached Professional Services Agreement. On this basis, total costs for the above scope of work are estimated as follows: • • • • December 21, 2004 Metric Engineering, Inc. Proposal — Hydrogeological Services City of Miami NE 718 Street Drainage Improvements Labor Rate Task 1 Proposed Field Plan Task 2 Field Activities Task Report Preparation Hours 3 Cost Hours Cost Hours Cost Senior Geologist $122.32 10 $1,223,20 4 $489.28 8 $978.56 Manager $104.99 0.5 $52.50 $0,00 0.5 $52,50 _Project Project Engineer $73.30 4 $293.20 8 - $586,40 8 $586.40 Field Geologist $58.25 $0.00 24 $1,398.00 4 $233.00 Subtotal $1,568,90 $2,473,68 $1,850,46 Labor Total $5,893.03 Expenses are estimated as follows: Laboratory analyses - 6 TDS samples $102.00 Field Equipment - SCT Meter $250.00 Mileage $75.00 Miscellaneous field supplies $50.00 Reproduction $75.00 Total Expenses $552.00 On this basis, total costs arc estimated at $6,445.03. However, this assumes that FDEP accepts the Proposed Field Plan without changes. URS requests authorization of Work Order #1 for $1,568.90, to cover labor and expenses to perform Task 1. Upon receipt of FDEP's approval and/or comments and suggestions, URS will provide Metric Engineering with an updated scope of work and cost to completion as Work Order #2. For budgeting purposes, it is estimated that Work Order # 2 will be for $4,876.13. If this proposal is acceptable, please sign the enclosed Professional Services Agreement and Work Order #1 and return these to our office. For your convenience, these may be faxed. URS December 21, 2004 Metric Engineering, Inc. Proposal — Hydrogeological Services City of Miami NE 71" Street Drainage Improvements We appreciate this opportunity to be of assistance to Metric Engineering. If you have any questions or comments on this proposal, please do not hesitate to contact us. Sincerely, URS Corporot' n' / Carlos F, Garcia, P.G. Consultant CC: Mr. Keith Stannard — URS Miami Enclosures: Professional Services Agreement Work Order 1 • •