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s s � Table 3 2a 30011 Crown Valley Parkway, La una Ni uel- Sin le Well Statistics -Trend Analysis minimum Mann Kendall Sans test number o4 testfortrand x=time(years) MTBE data ranges(for data without qualifiers) sample statistics(detected datal samples y=In(c) and c=concentration(uglL) (4) non-detect(<) meas (detected)samples m Mann decreas log decreas anthmelic std geometnc geometric data sell Kendall trend decreas slope err m slope zero trend decreas combined first last count min max, count min max average dev mean std dev statistic evdent trend? d In(cydt (at 95%Cl) slopel emdent trendy interpretatbn of We9 No dale date u u u L u u L 1L — CI 1 ar 1! ar— CI trend MW-01 3!3!00 518!03 1 1 1 4 26 1800 616 801 263 1 75 yes -6 0958 decreas 32 1 D6 no 1 decreas decreas MW-02 3(6!00 518103 1 0 D — — — — — no MW-03 3000 518!03 0 6 18D 46000 9660 17900 2650 1 63 yes 9 0 932 decreas 317 D487 829 yes 0 823 no trend decreas 1 no trend MW-04 313!00 518103 0 2 36000 42000 39000 4240 38900 0109 no MW 05 313!00 518103 0 7 4000 330000 102000 117000 48000 1 53 yes 7 0 809 decreas 1 75 229 322 yes 0 732 no trend decreas I no trend MW 06 313100 516103 0 1 71 71 71 71 — rto MW 07 313100 9116!03 6 50 200 6 22 910 212 344 931 131 yes 13 0 992 decreas 2 1 1 47 2 8 no 0 907 decreas decreas MW-08 3000 9!!6103 0 12 170 16000 3370 4760 1590 1 3 yes -62 1 decreas 1 14 -0912 146 nO 0 984 decreas decreas MW-09 3!3!00 9116!03 D 0 — — — — no MW 1D 3!3!00 9116!03 0 15 450 530000 40700 136000 2920 1 99 yes 79 1 decreas 1 37 -0812 185 no 0 976 decreas decreas MW 11 3000 9116103 0 13 240 20000 3210 5570 1140 142 yes -45 0 996 decreas 1 26 -0649 18 no 092 decreas decreas MW 12 313IDD 9!16103 3 1 1 9 1 '2 251 2 54 1 97 0 631 yes 16 0 94 decreas -0 218 0 009 13 yes 0 799 no trend decreas I no!nand MW 13 313!009/16103 0 12 110 830 272 210 225 0603 s 53 1 decreas 1 0 514 -0288 -0833 no 0 968 decreas decreas TBA rlondelecl(<) meas(detected)samples Mann decreas log decreas Lnthrn;elic std geometric geomeinc minimum Kendall trend decreas slope ov in slope zero trend decreas combined first last count min max count min max re dev mean std dev samples? statistic evident trend? d In(cydt (at 95%CI) slope? evident trend'r interpretation of en No date dale u u 1L u u L u Cr 1 ear 1/year) CI trend MW-01 313100 518!03 D 5 4100 30000 13200 10300 10300 0 784 yes -4 4 758 decreas -0 71 404 — no 0 707 decreas decroas MW-02 313100 518143 D 0 — — — — — no MW-03 3!3100 518!03 0 5 16000 110000 63800 37200 52400 0 774 yes -6 0 883 derreas -0727 161 — no 0 774 decreas decreas MW 04 313100 518103 0 2 1700DO 260000 215000 63600 210000 03 no MW415 3000 518/03 0 7 140000 1100000 55D00D 324000 460000 0 691 yes 17 0 0054 intreas 102 221 0 164 no 0 129 increas ..._tr ay M 06 313100 518103 0 1 5400 5400 5400 5400 — MW-07 311100 9116103 0 13 44D 51000 20500 19700 8980 1 59 yes 57 0000317 increas 1 34 182 083 no 00374 increas —1nlxeas MW-08 3000 9116103 1 1 DOOR 10000 11 1200 24000 965D 5940 6050 0 757 yes 3 0 438 increas 015 0 652 0 309 yes 0 468 no trend increas LVO Lrend- MW-09 313100 9116103 0 0 — — — — — no MW 10 313100 9116103 0 13 30000 1600000 207000 421000 99600 0 992 yes 38 0 988 decreas -0446 -0133 -0841 no 0896 decreas decreas MW 11 313100 9116/03 0 13 110 50000 29400 12400 198DO 1 59 yes 51 000114 increas 0 358 0 577 0 162 no 00636 increas _inrrP4____ MW 12 313100 9/16103 11 10 50 1 780 789 780 — 780 — no MW 13 313100 9A6f03 3 100 250 9 210 390 314 61 7 309 0208 yes 7 D 728 decreas 1 -0144 0 219 -0 377 yes 0 662 no trend I decreas/no trend Notes The range of first date to last date of data included In the trend analysis is as Indicated Data counts and ranges for detect and non-detect data are shown Analytical flagged data(J- code)are not included A minimum of 4 samples Is set as a criterion for the trend analysis For the Mann-Kendall statistic a single-sided confidence interval(CI)for a decreasing trend Is Indicated[CI=1 Is certainty in a decrease and Cl=0 Is certainty In an increase] For Sen s test,a logarithmic slope Is shown,along with a 95%confidence Interval range In the slope A no-trend judgment is made If the 95%confidence interval Intersects the zero-slope trend,otherwise a positive slope Is Increasing and a negative slope is decreasing The Sen's test confidence Interval(CI)for decreasing trend Is also shown[Ct=1 Is certainty in a decrease and CI=0 Is certainty in an Increase] 6