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Jim Pinasco <br /> August 15, 1994 <br /> Page 3 <br /> Recommendations <br /> Centralizers should be used in construction of all wells <br /> regardless of depth of completion. <br /> 4 . Required Accuracy for Surveying Top of Well Casing Elevation <br /> Section A.7 . 0. 0. 4 of Appendix A lists the required vertical <br /> accuracy for monitoring well casing elevation as plus or minus <br /> 0. 1 foot. However, accuracy to 0. 1 foot is inappropriate because <br /> ground water levels are measured to an accuracy of 0. 01 foot. <br /> Recommendations <br /> The required vertical accuracy for surveying monitoring well <br /> casing should be plus or minus 0. 01 foot and Section A.7 . 0. 0. 4 <br /> should be revised to reflect this. <br /> MS.t1 <br /> M543.OM/IOC <br />