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GEOSCIENCE will attend one pre-constructlon meeting with the selected Contractor and City personnel to review key issues within the contract documents and technical speoifloations. In addition, questions will be addressed regarding hydrogeologic and logistical matters. Items to be discussed at the meeting will include (but not be limited to) required submittals slid inspections, permitting, discharge Issues, work schedule, involving, and communication protocols, Additionally, at the time of the pre-construptipn meeting, the prospective, Contractor will have the opportunity to visit the well site to satisfy themselves regarding conditions that may affect equipment set up. At the time of the meeting, the Contractor will have the opportunity to point out any issues that they may have regarding preparation of the site for the work. GEOSCIENCE will coordinate Contractor activities priorto mobilization. This will include verifying that the Contractor has providers all submittals required by the technical specifications and that equipment delivered to the Site Insets the requirements of specifications, it Is assumed that elf rehabilitation work will be bid under one contract and that attendance at only one pre -construction meeting for this Phase will be necessary. S, Technical Plans and Specifications GEOSCIENCE will prepare detailed technical plans and specifications for the rehabilitation of the City well based on observations obtained In Phase I, Including a detailed bid schedule with specific line items showing units and unit quantities for the work, Items Included in the technical specifications will include (but are not limited to) the following; • Well location, depth, dimensions, and materials-, ® Permits and regulatory requirement$, Compliance with discharge requirements (as necessary); Job conditions (e.g., nolse suppression, waste materials, runoff management, power, lighting, water, security, sanitation, parking, traffic control, and work damage); » Mobilization, demobilization, clearing, grubbing, and site cleanup; • Fqulpment, materials, and recordsto be furnished by the Contractor; • Records to be kept by the Contractor; • Well repair by swaging; • Well cleaning by brushing and bailing; • Well cleaning by chemical Injection; • Well redevelopment by airlifting and swabbing; • Well redevelopment by pumping and surging; • Aquifer pumping and recoverytest protocol; + Flowmotersurvey; • Field ground water quality monitoring protocol; • Ground water sampling protocol; • Post-rehabjlitatlon "duakoam" downhale video survey; and • Final well disinfection. GEOSCIENCE will submit an electronic copy of a 10 % DRAFT version of the technical plane and specli#cations to the City for review and comment. Comments to the draft will be incorporated and GEOSCIENCE will submit one (1) elaotronlc.popy and three (3) bound hard copies of the 100% FINAL technical specifications. 4. Field Inspection a. Well Modification by,$waging. If any damage to the well casing and screen Is observed from the downhole video survey, It may be necessary to swag a patch to stabilize fifter pack and formation material from entering the well during operation, if this is deemed necessary, GEOSCIENCE will provide full-time inspection while any patches or repairs are made. It, Initfal Brushing and Bailing of Well Casing and Screen A vigorous mechanical brushing procedure should be implemented to loosen and dislodge a maximum amount of surface encrustation and/or bio-fouling materlals. GEOSGIENCE will provide part�time inspection during brushing and balling of the Well to monitor the progress of the task and to ensure that the proper methods end equipment are employed. GEOSCIENCE will provide direction to Contractor regarding problem areas of the well screen that may require additional work. c. Chemical Rehabilitation Following mechanical rehabilitation, the well should undergo chemical cleaning to remove biofilm produced by bacteria, olays and fine-grained sediments, as well as assisting In removing biological slid mineral deposits that may be clogging the perforations and near -well zone. The exact nature of the chemicals to he used shall be recommended based on the results of the downhale video survey (Phase 1) and review of the wells water chemistry, GEOSCIENCE will provide full time inspection during mixing and application of the chemical mixture to ensure proper chemical concentrations and proper dispersal throughout the wall casing and screen. J. Initial Redevelopment by Swabbing and Airlifting