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magazines are legible in the cuttings) every five feet or more frequently <br /> if a change in refuse characteristics are observed. <br /> • Depth of identifiable liquid seeps. <br /> • Depth of Native soil under existing refuse. <br /> • Characteristics of native soil. <br /> • Depth of refuse that causes drilling obstruction. <br /> • Drilling start and finish time. <br /> I. Refuse and soil with refuse drilled out shall be disposed in a Contractor <br /> provided dumpster bin. The opening of dumpster shall be covered at all <br /> times and its contents disposed off-site when full. The Contractor may <br /> choose North County Landfill to dispose materials in the dumpster. <br /> Contractor shall pay all disposal fees. <br /> J. The Contractor shall re-drill any caved borings at no additional cost to the <br /> County. <br /> 3.04 ABANDONED BORINGS <br /> A. The Contractor shall alert the Engineer if an obstruction is reached during <br /> drilling such that the well cannot be completed in accordance with the <br /> construction drawings. <br /> B. The Engineer will determine whether the borehole has reached a sufficient <br /> depth for its intended function. If the borehole is not to the design depth, <br /> then the Engineer may direct the Contractor to abandon the borehole. <br /> C. Backfill abandoned borings in native soil with neat cement. The Contractor <br /> shall tremie neat cement in the abandoned boring <br /> D. Backfill abandoned boring in refuse with soil. <br /> E. The Engineer will direct the Contractor to a new well location. <br /> 3.05 WELL INSTALLATION <br /> The Contractor shall coordinate well inspections with EHD inspector. <br /> The Contractor shall re-drill any borehole that caves during well installation <br /> at no additional cost to the County. <br /> Construction Specifications San Joaquin County <br /> Dual LFG Extraction Wells Public Works Department <br /> Harney Lane Sanitary Landfill Page 7 of 13 Solid Waste Division <br /> Revised 11-18-09 <br />