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the Office of the State Engineer who will provide information regarding <br /> how the incorporated material may be obtained or examined is: Assistant <br /> State Engineer for Ground Water, 1313 Sherman Street, Room 818, Denver, <br /> Colorado 80203. The number of tests conducted on a- sample and the <br /> specific negative pressures may vary, but, as a minimum, values must be <br /> obtained at tensions (negative pressures) of 10, 30, 100, 300, and 450 <br /> feet of water. Laboratory test data shall be plotted as a moisture <br /> content-tension curve. The appropriate value of specific yield for the <br /> sample will be the lesser of the specific yield for the test conducted at <br /> the greatest negative pressure or the value coinciaing for the negative <br /> pressure in feet which is equal to the thickness of the aquifer or portion <br /> thereof at the well site. <br /> 3) In unconfined aquifers, the State Engineer shall accept an <br /> aquifer or well test ascertaining the specific yield of the aquifer at the - <br /> location of the well . <br /> 4) The applicant, prior to well construction, may request the <br /> State Engineer to consider the use of substitute laboratory , procedures for <br /> determining specific yield, the use of geophysical logging procedures <br /> which measure specific yield directly, or the use of other methods to <br /> determine specific yield. The State Engineer shall evaluate the request <br /> and either approve or disapprove the alternate method and inform the <br /> applicant accordingly. <br /> E. The number of feet of saturated aquifer materials shall be <br /> determined as follows: 1 ) The number of feet of saturated aquifer <br /> materials from a specific aquifer will be calculated from analysis of <br /> geophysical logs meeting the minimum log requirement described in Rule 9 <br /> or by application of valid Rules & Regulations applying to a particular <br /> aquifer. The appropriate value for use in determining the allowed average <br /> annual amount of withdrawal will be an average value for the saturated <br /> aquifer materials which underlie the overlying land. The -applicant may be <br /> required to demonstrate that the individual aquifer materials are in fact <br /> saturated in order to claim those zones in the calculation of saturated <br /> aquifer materials. <br /> F. The State Engineer shall require an applicant or permittee who <br /> wishes to submit site specific data to establish the average specific <br /> yield value or average number of feet ,of saturated aquifer materials <br /> underlying the overlying land to furnish data obtained from more than one <br /> site, if necessary, to determine an average value for the land. Data <br /> obtained for a specific site shall be presumed to be representative of <br /> aquifer characteristics within 1 ,320 feet of that site. <br />