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TEST FOR NORMALITY: <br />NORMAL DISTRIBUTION? <br />TEST FOR OUTLIERS: <br />OUTLIERS PRESENT? <br />NO <br />TRANSFORM DATA NO <br />USE NOPARAMM <br />PROCEDURE <br />DETERMINE PERCENTAGE <br />OF RESULTS (P) ABOVE THE <br />DETECTION LIMIT DL) AND <br />THE NUMBER OF ESULTS <br />(N) THAT ARE GREATER <br />THAN THE DL. <br />P1>8_5�io <br />N'?3 <br />TEST FOR NORMALITY. <br />NORMAL DISTRIBUTION? <br />50%2-: P<85% lo% P<50% <br />N>3 NO <br />REPLACE NON DETECTS WITH I ADJUST THE MEAN AND <br />1/2*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 />I <br />NO STATISTICAL EVIDENCE <br />OF CONTAMINATION <br />STATISTICALLY <br />SIGNIFICANT EVIDENCE OF <br />CONTAMINATION <br />Pf<lo% <br />QUALITATIVE <br />INTER -WELL <br />COMPARISON OF <br />DATA <br />USE AN INTER -WELL TEST <br />OF PROPORTIONS <br />PROPORTION OF DETECTS <br />IN DETECTION MONITORING <br />WELL EXCEED <br />PROPORTION IN <br />BACKGROUND WELL <br />SIGNIFICANTLY? <br />FIGURE ■ <br />SCHEM1 • TIC . STATISTICAL <br />ANALYSIS <br />/ <br />••• PROCEDURES <br />