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-- - ' 2,1GINAL <br />�Kraza_ & ASSOCIATES, INC. <br />GEOTECHNICAL ENGINEERING• ENVIRONMENTAL ENGINEERING <br />CONSTRUCTION TESTING & INSPECTION <br />June 20, 2000 KA Project No. 036-00036 <br />Mr. Rollo Stephens <br />Ramcon Engineering & Environmental Contracting, Inc. <br />PO Box 1026 <br />West Sacramento, California 95691 <br />RE: In-place Density Testing — Tank Removal Excavation <br />San Joaquin County Mosquito & Vector Control District Office <br />7759 Airport Way <br />Stockton, California <br />Dear Mr. Stephens, <br />In accordance with your authorization, a representative of Krazan & Associates, Inc. performed in-place density testing for <br />the old tank excavation at the above -referenced project. The density testing services summarized in this report were <br />performed by our engineering technician, Mr. Samual Hyatt, on June 6, 2000. <br />Our services included part-time field observation, in-place density testing and associated laboratory compaction tests. The <br />in-place density tests were performed in accordance with ASTM Test Designations D2922 and D3017 (Nuclear Probe <br />Method). The approximate test locations are shown on the attached field report and the laboratory as well as the field density <br />results are presented on the attached table. The depths noted are measured from finished subgrade elevation. <br />The results of the density tests indicated that the backfill material for the tank excavation at the locations and depths tested <br />was placed and compacted to a minimum 90% of the maximum dry density in accordance with the approved project plans <br />and specifications. This testing does not preclude the possibility that the soil or fills may be loosened by future construction <br />activities. <br />Test results represent the compaction at the depths and locations where the tests were performed. Full time construction <br />observation or testing was not conducted during this portion of the project. Our firm does not guarantee earthwork <br />construction, nor does our work relieve the contractor of his responsibility to conform with the approved project plans and <br />specifications. This report represents a summary of progress on the date above. A final report can be provided at <br />completion of the project, if required. <br />If you have any questions or if we can be of further assistance, please do not hesitate to contact our office. <br />Respectfully submitted, <br />KRAZ" & ASSOCIATES. INC. <br />Daniel P. Co <br />Managing En <br />RCE No. 52172 <br />DPC1DA:kl <br />cc <br />Dean Alexander <br />Principal Engineer <br />RCE No. 34274 <br />With Ten Offices Serving The Western United States <br />123 Commerce Circle • Sacramento CA 95815 • (916) 564-2200 • Fax: (916) 564-2222 <br />03000036.1.ukpit.dw <br />