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TEST FOR NORMALITY: <br />NORMAL DISTRIBUTION? <br />---- IYES <br />TEST FOR OUTLIERS: <br />OUTLIERS PRESENT? <br />NO <br />TRANSFORM UKIVI LJM I A NO <br />NOPARAMEl <br />PROCEDURE <br />DETERMINE PERCENTAGE <br />OF RESULTS (P) ABOVE THE <br />DETECTION LIMIT (DL) AND <br />THE NUMBER OF RESULTS <br />(N) THAT ARE GRDL. <br />EATER <br />THAN THE <br />P ?-:85% <br />FNt <br />NO <br />TEST FOR NORMALITY: <br />NORMAL DISTRIBUTION? <br />,.. F---- <br />50%? r P<85% 1 <br />0 <br />%T<50% <br />FN73 0 FN <br />YES ES <br />REPLACE NON DETECTS WITH 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 />IVES <br />NO <br />I <br />NO TICAL EVIDENCE <br />OF CONTAMINATION <br />P1<10% <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 />STATISTICALLY <br />SIGNIFICANT EVIDENCE OF <br />I <br />CONTAMINATION <br />FIGURE D-1 <br />SCHEMATIC OF STATISTICAL <br />ANALYSIS PROCEDURES <br />CITY OF STOCKTON <br />CH2MHILL <br />