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BOREHOLE ABANDONMENT <br /> Each day at the conclusion of the soil sampling activities, the boreholes were backfilled to the surface with <br /> a neat cement grout. The grout was slowly poured into the bottom of each borehole to minimize the <br /> possibility of bridging. The upper few inches of each borehole were backfilled with'/,-inch gravel to match <br /> the surface of the facility. Borehole abandonment was witnessed by a representative of SJCPHSD. <br /> cca09/17/93(9784a.doc)cp45) 4-3 <br />