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ot <br />• <br />k"K L E I N F E L D E R <br />File No.: 20-1147-04 <br />August 3, 1988 <br />City of Stockton <br />Municipal Utilities Department <br />2500 Navy Drive <br />Stockton, California 95202 <br />Attention: Mr. Don King <br />Subject: RESULTS OF LABORATORY TESTS ON SLUDGE <br />MATERIAL FROM STOCKTON WASTEWATER <br />TREATMENT FACILITY/STOCKTON, CA <br />Gentlemen: <br />As requested, a representative of our firm obtained samples of the sludge <br />material from two stockpiles located at the wastewater treatment facility on <br />Navy Drive. These samples were delivered to our laboratory for testing. Tests <br />were performed to evaluate the suitability of the material as foundation <br />material in a landfill. The tests performed included a .Moisture Density <br />Analysis in accordance with ASTNI D-1557 .Method A, a Consolidation Test on <br />material compacted at approximately 90 percent relative degree of compaction, <br />and Unconfined Compressive Strength Test on samples of compacted soil at various <br />moisture contents. The results of the tests are presented on Plates I and 1I, <br />and Table 1, attached. <br />Although the material has a relatively low compacted density, the strength <br />characteristics of the material will allo%v its use as foundation material. We <br />also note that the consolidation characteristics of the material are very low. <br />It is also noted that the material has a high optimum moisture content and will <br />require a considerable amount of water to facilitate compaction if the material <br />is allowed to dry. It is recommended that the material be compacted to a mini- <br />mum relative degree of compaction of 90 percent based on ASTM D-1557 in the <br />landfill. <br />If you have any questions or need additional information, please contact us. <br />Respectfully submitted, <br />KLEINFELDER <br />Ron Hei nzen, G.E. <br />RE f:rls <br />MD62/cc: Client (2) <br />KLEINFELDER 2825 East Myrtle Street, Stockton, CA 95205 (209) 948-1345 <br />