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The annual monitoring program described above should be conducted <br />until waste acceptance is initiated at the site, which is proposed for <br />1990. This will constitute a "background" monitoring program (i.e., <br />three annual analytical events and analytical data from analyses <br />previously performed at the site). The background analytical data <br />from all wells should be used in the development of Water Quality <br />Protection Standards (WQPS) for the site. <br />In developing WQPS for use in a detection monitoring program, it will <br />also be necessary to select a statistical evaluation procedure. <br />Subchapter 15 requires the use of Cochrane's Approximation to the <br />Behrens -Fischer Student's t-test unless an alternate procedure is <br />approved by the RWQCB. At this time, it is anticipated that the <br />Student t-test will not be the appropriate statistical evaluation <br />method and that an alternative, such as the tolerance interval method, <br />will be recommended. <br />Once waste acceptance is initiated, the annual background monitoring <br />program should be converted to a routine quarterly detection monitor- <br />ing program in accordance with Subchapter 15. In converting to a <br />detection monitoring program, the background data should be evaluated <br />to determine what changes to the analytical parameter list and testing <br />frequency are needed. <br />PJ9 9390207.00D 17 <br />