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n I] u L 1 r a L r_ J. The well log form shall be completed by the Contractor in its entirety. A typed copy shall be submitted to the Engineer for review and acceptance after completion of the project. Well completion shall not be considered complete until the well log has been accepted as complete by the Engineer. K. All refuse and soil with refuse drilled out shall be disposed in a Contractor provided container and hauled off-site at the end of each working day. The Contractor may choose to dispose the materials in the container at the Tracy Transfer Station located at 30703 MacArthur drive in Tracy. L. If a well bore hole is not drilled by the end of the day and is to be left open, the Contractor shall securely cover the top opening of the bore hole with plywood, or approved equivalent to prevent any landfill gas escaping into the atmosphere. The Contractor shall cordon off the area with safety ribbon and barricades. At all times, the Contractor shall be responsible to enforce Cal OSHA Health and Safety requirements and secure the construction area. A. The Contractor shall alert the Engineer if an obstruction is reached during drilling such that the well cannot be completed as called for on the Construction Drawings. The Engineer shall determine whether the borehole has reached a sufficient depth for its intended function. If the borehole is not to the bottom of refuse, the Engineer may direct the Contractor to abandon the hole by backfilling with clean soil, compacted in two -foot lifts, up to four feet below grade. A bentonite seal, four inches thick, will be placed in the borehole four feet from the surface and the borehole shall be capped with compacted clean soil. The Engineer will advise the Contractor about a location and depth of a replacement well borehole, if any. B. Contractor is responsible for all equipment (i.e., drill bits, pipe, and tools) left in abandoned boreholes. 3.04 WELL INSTALLATION A. Install LFG extraction well in coordination with EHD inspector as per the Construction Drawings and as specified here in. B. The Contractor shall re -drill any borehole that caves in during well installation at no additional cost to the County. C. Place backfill materials in a controlled manner to avoid bridging or overfilling the boring, or damaging the well pipe. D. Remove any organic materials from the drain rock backfill. SHAW ENV/RONMENTAL, /NC. San Joaquin County — Extension of Cap Corral Hollow Sanitary Landfill — CH Closure Cap Ext Proj Technical Specs -4-19-12 Revl.DocRev. 0, 04/05/2012 Landfill Gas Extraction Well 02776-6