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FIGURE 4a TYPE I AQUIFER <br /> WELLS PENETRATING ONE CONFINING LAYER <br /> Option 1 Option 2 Option 3 <br /> Ground Surface ` t foot 1 foot i <br /> `E Steel Casing <br /> Always Grout as Required/ Steel Surface Casing E <br /> by Rule 10.5.2.1 C.C. <br /> Min.Depth 19 ft bgs —.f Min.Depth 19 ft bgs <br /> No: <br /> v. <br /> -� ) 10 ft Grout <br /> Overlap <br /> Base of Grout from i Base of Grout from _1 <br /> at Least 39 ft bgs at Least 39 ft bgs <br /> � 1 <br /> n 2 'E <br /> qn. _ r r r r r r <br /> r Q r r� r r r r <br /> Tii <br /> r r r r r <br /> 'Confier -- r r r r r r <br /> Must Grout to Base -: Must Grout to Base - Ell PerforatedCasing <br /> - of Confining Layer -= of Confining Layer — <br /> Overlying Production Zone 7- Overlying Production Zone _ Solid Casing <br /> Production Zone 7. Annular 7_ \ Solid Steel Casing <br /> - <br /> _ Space -_ <br /> r ri d Approved Grout <br /> Figure 4a. Schematic diagram for wells that penetrate only one confining unit and are <br /> constructed into a Type I (confined) aquifer. <br /> Note:If the well is constructed with steel casing, the interval from the base of the confining unit directly <br /> above the production zone to the depth required by Rule 10.5.2.1 must be grouted with approved grout <br /> (Table 2). If surface casing is used, the grout must extend 10 feet above the base of the grouted surface <br /> casing. <br /> Suggest updating figure for instance where surface casing is min 39' + penetrates into bedrock where <br /> 10'grout overlap is not required. Could also add instance to illustrate Policy 2017-2. <br />