NV5 - Laserfiche WebLink

Home Browse Search

SCOPE OF SERVICES WATER RESOURCES (OPTION A) Our Scope of Services incorporates the tasks Identified by the City In the RFP, and as expanded below, Well Rehaloliitaticn PHASE 1 - WELL RECONNAISSANCE 1. Dynamic Well Evaluation a. Perform Aquifer PUMPing Tests In order to evaluate the current health of the well, and to provide a baseline from which to measure the effectiveness of the Phase 11'work, aquifer pumping tests should be performed These tests will provide current well and aquifer characterlstlos along with providing sand readings over time from start of pumping, Recovery measurements should be collected for a minimum of two (2) hours following the constant rate pumping test, The recommended aquifer pumping tests are so follows; Step Drawdown PumpingTeat's -to determine specific capacity and Well efficiency relationships, Typically three to four rates are selected for pumping beginning at the lowest rate and working up to the highest. • Constant Rate Pumping Test & Recovery Test. time drowdown and recovery measurements will be made to determine aquifer parameters such as transmissivity and storativity. it is recommended that the constant rate test be conducted for a minimum of 12 hours with 2 hours of recovery measurements, Our subconsultant, GEOSCIENCE will provide full-time inspection during pumping and recovery tests. 2.5tatio Well Evaluation a. Remove Existing Pump and Equipment From well GEOSCIENCE has teemed with Best Drilling and Pump, Inc. (Bost) to perform work associated with removal of equipment from the well. Best will remove the existing pumps, motors, and oolumn pipes from the well and store this equipment In the immediate area around the well site. Attire completion of all activities, Best will reinstall the pump and equipment to their original depths. Our cost proposal for this task includes Contractor fees. b. Perform Initial Video Inspection Once the pump is removed, Pacific Surveys, LLC (Pacific) under the supervision of GEOSCIENCE personnel, will perform a dual -scan downhole video survey of the well, The purpose of the video surveys will be to document the current condition and look for areas of damage and/or plugging In the well screen. GEOSCIENCE will provide full- time inspection during each video survey. The cost for the surveying Contractor is included in the proposal. S. Results and recommendations At the conclusion of the Phase I evaluation, GEOSCIENCE will prepare a letter reportthat summarizes the details and results of the work performed, This report will inolude: . Chronology of field activitlas, ° Analysis of aquifer pumping tests, • Evaluation of current well conditicns, and • Recommendations for further rahabilitation procedures. The letter report will be presented to the City In 100% DRAFT electronic format for review end comment. City comments will be incorporated and GEOSCIENCE will issue a 100% FINAL version in electronic format, as well as three (0) hard copies. For cost estimating purposes, it Is assumed that one round of comments will be addressed before a : Q0% FINAL verslon Is prepared. PHASE 11 - WELL REHABIUTATiON Based on the results of the activitles described in Phase I, some or all of the following tasks may be appropriate for the proper rehabilitation of the Well. Regardless of what tasks are decided upon, it will be necessary for the City to contract directly With a licensed. C•57 drilling Contractor to perform this work, The following scope Items are for GEOSCIENCE to assiat the City with procuring a qualified Contractor and providing field supervision during Contractor activities. 1, Project Construction Management GEOSCIENCE will provide construction management services during Phase II of the well rehabilitation to ensure that, all aspects of the project are carried out in a proper and efficient manner. Construction management activities will Include, but not limited to, attending a pre -construction meeting with prospective Contractors, responding to Contractor RFi's, review of Contractor submittals and Invoices, review of change order requests, and providing status updates to City personnel. In addition we will ensuro that all work is performed to the satisfaction of regulatory agencies. In addition, GEOSCIENCE will assist, as necessary, with the procurement of any permitting required to perform this work, including NPDES requirements. 2. Pre;Coneiructlon Meeting and Pre -Mobilization f, coordination with Contractor <<a