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CLACI A AS <br />COUNTY <br /> <br />August 20, 1992 <br /> <br />Department of Transportation & Development <br /> <br />W. H. Christner, Plant Supt. <br />Canby Sand & Gravel <br />PO Box 269 <br />Canby~ OR 97013 <br /> <br />SUBJECT: <br /> <br />SAND FILTER MEDIA APPROVAL <br />CANBY - SAND & GRAVEL <br /> <br />The sieve analysis by Carlson Testing, Inc., dated August 18, <br />1992, of material from canby Sand and Gravel, is found to meet <br />minimum DEQ specifications for "medium sand" used in the <br />construction of sand filter systems. Material approval is <br />granted for a period of 90 days. <br /> <br />Your cooperation in this matter is greatly appreciated. If you <br />have questions or need further information, please feel welcome <br />to contact our office. <br /> <br />BEP~NIE J. DUFFY - Soil Scientist <br />Building Services Division <br /> <br />/krb <br /> <br />cc: <br /> <br />Bill Doak <br />Larry Olander <br />Karen Livingstone <br />Dick Polson <br />Sand Filter Installers <br />File <br /> <br />902 Abernethy Road · Oregon City, OR97045-1100 · (503) 655-8521 · FAX650-3351 <br /> <br /> <br />