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REVISIONS TO WATER WELL STANDARDS <br />INTRODUCTION <br />Revisions to standards in DWR Bulletin 74-81, Chapter II, are presented in this section. All standards in <br />Bulletin 74-81 that are not revised by this supplement (Bulletin 74-90) remain unchanged and in effect. The <br />organization and numbering system used for the revisions is the same as that in Bulletin 74-81. <br />Table 1, page 10, below, lists portions of Bulletin 74-81 that are replaced by this supplement (Bulletin 74-90). <br />The user of this supplement should strike-out the replaced sections and paragraphs in the copy of Bulletin <br />74-81 that is enclosed in the back cover of this supplement. <br />.9-