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• J. H. KLFI,\FELINR \ ASSOCIATES File No. 5-2314-1 August 15, 1978 PAGE FOUR and were drilled under the direction of an engineer from i , our firm. Relatively undisturbed core samples of these soils were obtained at frequent intervals for visual examination, classification and laboratory testing. A continuous log of all the soils encountered in the borings was maintained. Soils were collected by driving a 2-inch inside diameter sampler into the soil using a 140-pound hammer falling 30 inches +. - The blow counts required to advance the sampler are noted on the Logs of Borings at the corresponding sample locations . PERCOLATION TESTS j At your request, our firm performed five series of Percolation Tests . Each series consisted of three separate j tests performed in percolation holes extending 2 feet, 4 feet and 6 feet below the ground surface. The tests were performed in general accordance with the procedures outlined in the ! "Manual of Septic Tank Practice" by U. S. Department of Health, Education and Welfare. Percolation Test holes were approxi- mately 6 inches in diameter and were drilled on July 18, 1978 . Pea gravel was placed at the bottom of each hole and around a 1 4-inch perforated plastic pipe. The actual Percolation Tests were performed on July 20 and 21, 1978. The water level in each test was adjusted to approximately 12 inches above the top of pea gravel. In general , the tests were conducted over a period of approximately 4 hours with several reading and refillings f performed during this time. The results of the Percolation Tests are presented on Plate XVIL. The Logs of Percolation Test Holes are presented on Plates XIII through XVII . TEMPERATURE MEASUREMENTS Temperature measurements were attempted during the drilling of Borings 6 , 7 and 9 on July 26 , 1978. The procedure used was to drill to a particular depth , remove the auger and insert a 1