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CITY OF LATHROP <br /> a) time, depth and results of all drilling fluid tests; <br /> b) materials added to the system;type, quantity,time, and depth; <br /> c)variances or modifications from approved drilling fluid program (e.g., time, depth, reason, and <br /> authorization). <br /> 7. Proper control of the drilling fluid must be maintained to the satisfaction of the City. The <br /> Contractor will be required, at the Contractor's expense, to retain or employ an experienced, <br /> qualified drilling fluid, or mud, engineer to supervise and maintain drilling fluid characteristics to <br /> the satisfaction of the City if such control cannot be accomplished by the Contractor. <br /> 8. If at any time the drilling fluid is not in compliance with these Technical Provisions or the <br /> recommendations of the drilling fluid engineer, as approved by the City, the properties shall be <br /> adjusted, and the tests rerun until the drilling fluid obtains the specified characteristics. If the <br /> specified properties cannot be maintained,the drilling fluid shall be replaced. <br /> 9. The Contractor shall provide one complete direct rotary drilling unit with shaker, de-sanding <br /> cones, and containment facilities if directed by the Engineer. <br /> 2.2 MATERIALS <br /> 2.2.1 CERTIFICATES OF COMPLIANCE <br /> If requested by the City,the Contractor shall provide certificates of compliance as specified herein. <br /> A. Items Requiring a Certificate of Compliance <br /> 1. The Contractor shall submit to the City for approval, certificates of compliance for the <br /> following materials: <br /> a) Cement Grout Sealing Material <br /> b) Blank Well Casing <br /> c) Well Screen <br /> d) Gravel Envelope Material <br /> 2. No material shall be incorporated into the Work until certificates of compliance have <br /> been approved in writing by the City. <br /> B. Content of Certificates of Compliance <br /> 1. Certificates of compliance from the Contractor, suppliers, and/or manufacturers, shall <br /> clearly indicate that the material to be delivered to the job site will meet all requirements <br /> of the project Technical Provisions. A certificate of compliance shall include, but not be <br /> LUHDORFF&SCALMANINI <br /> CONSULTING ENGINEERS 8 <br />