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Table 3.2c 27101 Ortega HijZhway- Single Well Statistics -Trend Analysis minimum Mann Kendall Sen s test number of est far trend x=time(years) MTBE data ranges(for data wdhout qualISSM) sample statistics(detected data) samples y=In(c)and c=concentration(ug1L) 4 non-detect(<) meas (detected)samples sn Mann decrees log decrees ardhmehc std geometric geometric data sets Kendall trend decrees slope err in slope xero trend decreas combtned first last count min max count mm max average do,, std dev, taestic evident vend? d In(cydt ;at 95%Cl) slope? evident !rend? Interpretation of WeG No date date u u L u L uU f—� CI 1 ar 1"or) (Cl I trend MW 5 31141D0 9128100 0 2 36000 43000 39500 4950 39300 0 126 no t ATN 2 3114100 811103 2 100 200 a 35 250 135 83 1 110 0 729 yes 12 0 089 rncreas 061 1 18 .0857 yes D 266 no trend nxreas/no trmnd MWh 3114!011 811103 0 11 200 100000 13700 30200 2070 199 yes 49 1 decreas 208 169 229 no 0973 decreas decreas MW 5 3!14100 8!1103 6 2 10 5 11 310 103 121 5134 1 25 yes 8 0 958 decreas 308 1 98 — no OW decreas decreas MW-6 3114100 811113 6 2 1000 5 14 4100 951 1760 218 203 yes 8 0 958 decreas -4 32 -0821 — no 0 851 decreas decreas MW 8 3114100 811703 4 10 25 6 52 340 130 110 103 0 714 yes 5 0 765 decreas -0711 143 459 yes 0 727 no trend decreas l no trend MW 9 31141013 811103 0 11 230 35000 15600 13100 6970 1 76 yes -44 1 decreas 1 77 1 D9 253 no 0 96 decreas docreas MW 10 1 3114100 811103 2 100 250 3 2200 7600 5030 2710 4460 0 638 no MW 11 813101 811103 1 100 100 a 100 4800 1410 1890 646 132 yes 24 0 999 decreas 1 B5 107 266 no 0 944 decreas decreas MW 12 813!01 811103 0 9 620 19000 4220 5740 2550 0 967 yes 30 t degas 106 -078 186 no 0 943 decreas decreas MW 13 8!3101 811103 0 9 14 590 220 2D3 146 1 09 yes 28 0 999 decreas 1 1 -0347 202 no 0 929 decreas decreas MW 14 10124102 811103 0 4 53 79 70 5 11 9 697 0 165 yes MW 15 10724/02 811103 0 4 23 270 163 104 119 1 12 yes ATN 16 10/24/02 8!3103 0 4 140 360 230 1342 217 D 396 yes 1 3114/00 9128100 0 0 — no W 2 1 3114700 t 811103 0 11 23 40000 5230 12100 493 2 35 Yes 33 0 994 decreas 1 246 -0 634 4 84 no 0 902 decreas I decreas THA non-detect{<) meas (detected)samples Mann decreas log decreas amhmetic sld geometnc geometric mintmum Kendall trend decreas slope err m slope zero trend decreas combated rirsl last count min max count min max average do" mean std dev, samples? statistic evident trend) d In(cydt (at 95%CI) slope? omden! trend? Interpretation of WeA Na dale date u u u u L u 1L u CI 1f ear 11 ear CI trend _ MW 1 3114100 9128100 0 0 — — — — no MW 2 3114/00 811103 0 10 6400 110000 59500 35700 43000 103 yes 11 019 :ncreas 05D 145 -0407 yes 0 318 no trend mcreas 1 no Nord MW-4 3714100 811103 0 9 48000 88000 68700 16800 66800 0 256 yes -4 0 619 decreas -D 0562 0 359 -0529 yes 0 583 no trend decreas 1 no trend MW 5 3114100 811103 0 10 1300 230011 7280 7630 4490 1 134 yes 1 05 no trend 00669 1 17 184 yes 0 495 no trend no trend MW-6 3114100 811/03 0 10 740 390D00 44100 12200D 6030 173 yes 3 0 569 decreas -0154 156 187 yes D 567 no trend decreas/no trend ATN 8 3114/00 1111103 0 10 3100 100000 27600 37300 13700 1 19 yes 7 03 mcreas 0 348 1 17 1 83 yes 0 403 no trend tnomas 1 no trend ATN 9 3114190 811103 2 1WIXI 13D00 7 8900 43000 23300 11800 20700 0 53 yes 16 00102 mcreas 0 716 1 31 0 168 no 013 mcreas Increas MW 10 3114/00 811103 0 5 86000 170000 132000 401 DO 127000 0 322 yes 7 092 decreas -0645 000 — no 0 836 decreas decreas r MW 11 813101 811103 0 9 35000 95000 641 D0 17500 61900 0 288 yes 19 097 decreas -0352 -0 0247 -0555 no 0 851 decreas decreas MW 12 8W1 811103 1 2500 2500 8 3500 6500 5200 977 5110 0201 yes 16 0 031 mcreas 0 219 0 589 -00133 yes 0 172 no trend mcreas/no Vend MW 13 813101 811103 a 9 390 2400 1190 622 1050 0 551 yes 16 094 decreas -0 625 0 121 1 25 yes 0 807 no trend decreas I no trend MW 14 10124102 8!1!03 1 10 1 D 3 11 21 153 5 13 148 0 327 no MW 15 10124102 8/1193 t 10 19 3 36 84 64 7 253 607 0 457 no MW 16 10124102 811193 0 4 61000 64000 62800 1500 62790 0 024 yes 1 05 no trend 00106 0 217 — no 05 mcreas to[1) W 1 3114100 9128100 0 0 — — — — no W 2 3/14MO 811103 0 10 755 27000 8740 8350 4960 1 26 13 0 146 mcreas 0 63 2 24 -0 866 s 0 302 no herd Snpea37.treri note[1](tri table)-Confidence interval on decreasing trend is P=0 5,or)test as likely to be decreasing as Increasing i 8