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pressures, and description of the cementing equipment to be used by the <br /> CONTRACTOR for the cementing operation . <br /> 3 . 3 . 3 All cementing of casing shall be accomplished in the presence of the <br /> ENGINEER. <br /> 3 . 3 .4 If cementing activities require observation by a SJRWMD and/or County <br /> Health Department representative, the CONTRACTOR shall notify and <br /> coordinate cementing activities to accommodate this requirement at no <br /> additional cost to the OWNER. <br /> 3 . 3 . 5 The pressure grout method of cement placement shall be used for the <br /> initial stage of grouting the intermediate and final casings . The grouting <br /> shall be done in such a manner that shall assure the entire filling of the <br /> borehole and annular space from the casing bottom to the vertical stage <br /> height obtained. The grouting shall ensure a watertight seal around the <br /> well casing to avoid downward or upward movement of water along the <br /> casing annulus and borehole. The CONTRACTOR shall monitor <br /> temperature and casing pressure during grouting operations . <br /> 3 .3 . 6 The annular space tremmie method is required for all subsequent cement <br /> stages. The bottom of the tremmie pipe shall initially be set within five <br /> feet of the top of the previous annular grout tag in the well , as approved <br /> by the field ENGINEER. Tremmie pipe shall be withdrawn as the <br /> annulus is filled, and before the cement has begun to set. <br /> 3 . 3 . 7 Samples of each lift of cement grout installed around each of the casings <br /> shall be retained by the CONTRACTOR . These grout samples must be <br /> collected a minimum of three times for each cement batch pumped; <br /> before pumping, in the middle of the batch , and near the end of the batch. <br /> Each sample shall be labeled and forwarded to the ENGINEER. <br /> 3 . 3 . 8 The CONTRACTOR shall submit cement reports to the ENGINEER <br /> identifying the mixture and quantity of cement grout utilized for each <br /> cementing stage completed. <br /> 3 . 3 . 9 Staging and use of thixotropic or other high -yield cement types with <br /> special additives shall be required through highly permeable intervals, if <br /> approved by the ENGINEER and the SJRWMD . <br /> 3 . 3 . 10 Staging and use of gravel in an open borehole area shall be required if <br /> approved by the ENGINEER and the SJRWMD . The gravel shall be <br /> GROUT <br /> 02090 - 4 <br /> C:\DOCUME— I \mikeh\LOCALS-1 \Temp\Temporary Directory 16 for FRC wells Div l .zip\08-IRC_Grou1.doc <br /> 10117/07 <br />