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DETERMINE PERCENTAGE <br />OF RESULTS (P) ABOVE THE <br />DETECTION LIMIT (DL) AND <br />THE NUMBER OF RESULTS <br />(N) THAT ARE GREATER <br />THAN THE DL. <br />sr r - <br />f 010,71721 a i <br />P X85% 50%= P<85% lo%%-_ P<50% <br />N3 N''-_3 ® N'5 <br />YES IYES <br />REPLACE NON DETECTS WITH ADJUST THE MEAN AND <br />112"DL AND CALCULATE A STANDARD DEVIATION <br />TOLERANCE LIMIT USING COHEN'S METHOD <br />AND CALCULATE A <br />TOLERANCE LIMIT. <br />DO VALUES IN THE <br />DETECTION WELL EXCEED <br />THE TOLERANCE LIMIT? <br />IYES <br />NO <br />NO STATISTICAL EVIDENCE <br />OF CONTAMINATION <br />PI<10°!0 <br />EVIDENCE OF <br />CONTAMINATION <br />FIGURE D-1 <br />SCHEMATIC OF STATISTICAL <br />ANALYSIS <br />CITY OF STOCKTON <br />