WS-2865_7196_CA_Oth_20240604_Mann-Kendall-test

Evaluation Date:Job ID:
Facility Name:Constituent:
Conducted By:Concentration Units:ug/l, ppb
Sampling Point ID:Bezene Total Xylenes IPE Toluene
Sampling Sampling
Event Date
1 07/01/98 1,800 592 76.4 344
2 09/01/98 3,710 920 276 1,690
3 12/01/98 17,200 7,250 196 19,700
4 03/01/99 3,010 1,060 91.8 945
5 06/01/99 4,070 1,710 208 1,950
6 09/01/99 4,770 1,930 1,690 3,400
7 03/01/00 8,030 2,940 2,570 6,580
8 09/01/00 3,700 1,800 480 1,400
9 03/01/01 2,200 1,100 520 1,300
10 03/02/02 7,000 2,100 2,100 5,000
11 02/10/03 7,000 3,310 1,900 4,700
12 03/04/04 4,850 2,976 1,040 4,300
13 12/07/07 5,930 3,434 1,330 4,040
14 06/03/08 4,480 2,785 1,050 2,970
15 12/30/08 4,370 2,406 979 2,690
16 06/26/09 4,880 2,619 1,140 2,780
17 01/06/10 4,630 2,846 1,190 2,430
18 07/08/10 3,530 2,148 934 1,980
19 01/21/11 3,900 2,320 1,050 1,840
20 06/30/11 2,480 1,164 704 423
21 02/10/12 600 370 200 44
22 11/29/12
23 08/29/13
24
25
Coefficient of Variation:0.69 0.64 0.74 1.22
Mann-Kendall Statistic (S):-31 24 35 -40Confidence Factor:81.5%75.4%84.6%87.9%
Concentration Trend:Stable No Trend No Trend No Trend
Notes:
1.At least four independent sampling events per well are required for calculating the trend. Methodology is valid for 4 to 40 samples.
2.Confidence in Trend = Confidence (in percent) that constituent concentration is increasing (S>0) or decreasing (S<0): >95% = Increasing or Decreasing;
≥ 90% = Probably Increasing or Probably Decreasing; < 90% and S>0 = No Trend; < 90%, S≤0, and COV ≥ 1 = No Trend; < 90% and COV < 1 = Stable.
3.Methodology based on "MAROS: A Decision Support System for Optimizing Monitoring Plans", J.J. Aziz, M. Ling, H.S. Rifai, C.J. Newell, and J.R. Gonzales,
Ground Water, 41(3):355-367, 2003.
DISCLAIMER: The GSI Mann-Kendall Toolkit is available "as is". Considerable care has been exercised in preparing this software product; however, no party, including without
limitation GSI Environmental Inc., makes any representation or warranty regarding the accuracy, correctness, or completeness of the information contained herein, and no such
party shall be liable for any direct, indirect, consequential, incidental or other damages resulting from the use of this product or the information contained herein. Information in
this publication is subject to change without notice. GSI Environmental Inc., disclaims any responsibility or obligation to update the information contained herein.
GSI Environmental Inc., www.gsi-net.com
BENZENE, CONCENTRATION (ug/l, ppb)
4-Jun-24
CSC Croncrete Benzene,
GSI MANN-KENDALL TOOLKIT
for Constituent Trend Analysis
Gene Mao
MW-1
1
10
100
1000
10000
100000
01/00 05/27 10/54 02/82 07/09 11/36 04/64 08/91 01/19Co
n
c
e
n
t
r
a
t
i
o
n

(
u
g
/
l
,

p
p
b
)
Sampling Date
Bezene
Total Xylenes
IPE
Toluene
Evaluation Date:Job ID:
Facility Name:Constituent:
Conducted By:Concentration Units:ug/l, ppb
Sampling Point ID:Bezene Toluen Ethylbenzene Total Xylene Naphthalene
Sampling Sampling
Event Date
1 07/01/98 6,130 5,600 854 4,530 1,280
2 09/01/98 14,300 18,500 2,800 8,600 3,040
3 12/01/98 10,800 27,900 2,740 13,700 BQL
4 03/01/99 15,000 19,600 1,810 9,950 2,880
5 06/01/99 19,200 31,100 2,650 13,700 4,040
6 09/01/99 12,100 16,800 1,550 8,400 4,070
7 03/01/00 12,200 15,400 2,150 13,100 2,450
8 09/01/00 11,300 20,000 2,080 11,100 1,240
9 03/01/01 20,000 29,000 3,300 20,000 2,100
10 09/01/01 7,800 7,500 1,600 8,900 550
11 03/02/02 7,800 6,000 1,500 9,500 690
12 02/10/03 5,800 7,200 1,400 7,500 BQL
13 03/04/04 6,000 3,800 1,100 6,400 440
14 12/07/07 3,550 922 486 3,175 340
15 06/03/08 4,750 4,000 996 5,600 449
16 12/30/08 3,250 1,200 572 3,378 331
17 06/26/09 3,660 2,490 722 4,340 393
18 01/06/10 4,580 3,200 982 5,630 393
19 07/08/10 3,200 781 493 3,331 330
20 01/21/11 3,190 758 537 3,417 393
21 06/30/11 2,790 443 411 2,970 416
22 02/10/12 2,760 600 457 3,032 391
23 11/29/12 8,600 15,000 1,300 8,500 730
24 08/29/13 2,200 1,400 440 3,240 480
25 12/17/13 2,700 1,700 520 4,500 500
26 06/04/14 2,500 1,400 470 3,700 480
27 05/06/15 6,730 13,600 1,360 9,250 552
28 10/07/15 8,150 15,600 1,440 7,220 771
29 04/14/16 7,170 14,000 1,330 7,820 859
30 10/13/16 103 64.2 4.7 83.9 52.4
31 04/20/17 18.5 19.2 3.6 25.1 24.9
32 10/12/17 204
33
34
35
Coefficient of Variation:0.76 1.03 0.70 0.63 1.08
Mann-Kendall Statistic (S):-295 -216 -255 -206 -156
Confidence Factor:>99.9%>99.9%>99.9%>99.9%99.8%
Concentration Trend:Decreasing Decreasing Decreasing Decreasing Decreasing
Notes:
1.At least four independent sampling events per well are required for calculating the trend. Methodology is valid for 4 to 40 samples.
2.Confidence in Trend = Confidence (in percent) that constituent concentration is increasing (S>0) or decreasing (S<0): >95% = Increasing or Decreasing;
≥ 90% = Probably Increasing or Probably Decreasing; < 90% and S>0 = No Trend; < 90%, S≤0, and COV ≥ 1 = No Trend; < 90% and COV < 1 = Stable.
3.Methodology based on "MAROS: A Decision Support System for Optimizing Monitoring Plans", J.J. Aziz, M. Ling, H.S. Rifai, C.J. Newell, and J.R. Gonzales,
Ground Water, 41(3):355-367, 2003.
DISCLAIMER: The GSI Mann-Kendall Toolkit is available "as is". Considerable care has been exercised in preparing this software product; however, no party, including without
limitation GSI Environmental Inc., makes any representation or warranty regarding the accuracy, correctness, or completeness of the information contained herein, and no such
party shall be liable for any direct, indirect, consequential, incidental or other damages resulting from the use of this product or the information contained herein. Information in
this publication is subject to change without notice. GSI Environmental Inc., disclaims any responsibility or obligation to update the information contained herein.
GSI Environmental Inc., www.gsi-net.com
CONCENTRATION (ug/l, ppb)
4-Jun-24
CSC Croncrete
GSI MANN-KENDALL TOOLKIT
for Constituent Trend Analysis
Gene Mao
MW-12
1
10
100
1000
10000
100000
01/00 05/27 10/54 02/82 07/09 11/36 04/64 08/91 01/19Co
n
c
e
n
t
r
a
t
i
o
n

(
u
g
/
l
,

p
p
b
)
Sampling Date
Bezene
Toluen
Ethylbenzene
Total Xylene
Naphthalene
Evaluation Date:Job ID:
Facility Name:Constituent:
Conducted By:Concentration Units:ug/l, ppb
Sampling Point ID:benzene toluene ethylbenzene total xylene IPE Naphthalene
Sampling SamplingEventDate
1 09/01/98 3,400 12,900 3,100 14,200 BQL 1,930
2 12/01/98 3,140 5,470 2,150 8,030 54 1,100
3 03/01/99 11,400 29,200 3,130 17,500 90 1,160
4 06/01/99 20,300 36,600 3,700 19,100 685 909
5 09/01/99 7,610 18,700 2,620 13,900 BQL 730
6 03/01/00 10,900 29,500 3,800 22,600 BQL 1,000
7 09/01/00 9,000 19,600 3,200 17,100 172 1,030
8 03/01/01 46,000 69,000 5,200 35,000 BQL BQL
9 02/03/03 25,000 39,000 BQL 9,800 BQL NA
10 03/04/04 17,000 32,000 2,600 15,700 BQL NA
11 12/07/07 10,400 31,200 2,460 14,460 294 NA
12 06/03/08 14,100 31,400 2,580 14,180 BQL 1,340
13 12/30/08 10,200 28,800 1,900 11,410 BQL 1,500
14 06/26/09 15,000 32,200 2,350 13,950 1,290 BQL
15 01/06/10 13,600 35,800 3,000 17,370 2,140 852
16 07/08/10 8,690 28,800 2,450 14,540 262 793
17 01/21/11 6,880 27,100 2,880 15,670 783 1,290
18 06/30/11 6,580 26,400 2,640 14,480 369 J BQL
19 02/10/12 7,070 27,400 2,570 14,180 309 J BQL
20 11/29/12 21,000 41,000 4,000 18,900 3,000 1,200
21 08/29/13 11,000 43,000 3,500 19,000 570 1,000
22 12/17/13 7,200 36,000 3,500 22,000 460 J 1,100
23 06/04/14 7,600 34,000 3,200 18,100 430 1,100
24 05/06/15 19,400 33,200 2,470 13,300 2,760 819
25 10/07/15 12,800 29,200 2,080 9,680 1,910 753
26 04/14/16 14,500 26,500 2,130 11,390 1,980 636
27 10/13/16 6,150 29,800 2,020 12,050 771 883
28 04/20/17 2,980 16,900 1,350 10,990 718 684
29 10/12/17 2,650 19,100 1,520 13,510 721 828
30 04/12/18 2,000 11,900 1,180 9,140 469 713
31 10/18/18 2,230 9,180 798 8,090 553 767
32 04/17/19 1,010 7,710 531 6,860 372 388
33 10/23/19 572 5,510 373 5,210 131 265
34 04/21/20 231 2,070 360 3,250 37.1 239
35 10/27/20 152 1,260 286 2,360 19.5 176
36 04/14/21 42.0 373 75.4 1,083 14.0 61.1
37 10/26/21 BQL 488 164 1,353 70.2 102
38 04/20/22 124 534 156 1,254 11.2 91.4
39 10/20/22 340 1,530 403 1,863 20.1 208
40 04/12/23 266 1,430 389 1,705 100 210Coefficient of Variation:0.98 0.67 0.61 0.57 1.20 0.57Mann-Kendall Statistic (S):-383 -336 -451 -419 -128 -346Confidence Factor:>99.9%>99.9%>99.9%>99.9%99.2%>99.9%
Concentration Trend:Decreasing Decreasing Decreasing Decreasing Decreasing Decreasing
Notes:
1.At least four independent sampling events per well are required for calculating the trend. Methodology is valid for 4 to 40 samples.
2.Confidence in Trend = Confidence (in percent) that constituent concentration is increasing (S>0) or decreasing (S<0): >95% = Increasing or Decreasing;
≥ 90% = Probably Increasing or Probably Decreasing; < 90% and S>0 = No Trend; < 90%, S≤0, and COV ≥ 1 = No Trend; < 90% and COV < 1 = Stable.
3.Methodology based on "MAROS: A Decision Support System for Optimizing Monitoring Plans", J.J. Aziz, M. Ling, H.S. Rifai, C.J. Newell, and J.R. Gonzales,
Ground Water, 41(3):355-367, 2003.
DISCLAIMER: The GSI Mann-Kendall Toolkit is available "as is". Considerable care has been exercised in preparing this software product; however, no party, including without
limitation GSI Environmental Inc., makes any representation or warranty regarding the accuracy, correctness, or completeness of the information contained herein, and no such
party shall be liable for any direct, indirect, consequential, incidental or other damages resulting from the use of this product or the information contained herein. Information in
this publication is subject to change without notice. GSI Environmental Inc., disclaims any responsibility or obligation to update the information contained herein.
GSI Environmental Inc., www.gsi-net.com
CONCENTRATION (ug/l, ppb)
4-Jun-24
CSC Concrete
GSI MANN-KENDALL TOOLKIT
for Constituent Trend Analysis
Gene Mao
MW-13
1
10
100
1000
10000
100000
01/00 05/27 10/54 02/82 07/09 11/36 04/64 08/91 01/19Co
n
c
e
n
t
r
a
t
i
o
n

(
u
g
/
l
,

p
p
b
)
Sampling Date
benzene
toluene
ethylbenzene
total xylene
IPE
Naphthalene
Evaluation Date:Job ID:
Facility Name:Constituent:
Conducted By:Concentration Units:ug/l, ppb
Sampling Point ID:benzene
Sampling Sampling
Event Date
1 12/07/07 5.22
2 06/03/08 13.3
3 12/30/08 12.9
4 06/26/09 9.6
5 01/06/10 18.1
6 07/08/10 10.9
7 01/21/11 16.5
8 06/30/11 11.8
9 02/10/12 23.3
10 11/29/12 16.0
11 08/29/13 20.0
12 12/17/13 20.0
13 06/04/14 20.0
14 05/06/15 6.3
15 10/07/15 5.9
16 04/14/16 7.3
17 10/13/16 3.3
18 04/20/17 4.2
19 10/12/17 3.5
20 04/12/18 4.7
21 10/18/18 1.9
22 04/17/19 2.0
23
24
25
Coefficient of Variation:0.63
Mann-Kendall Statistic (S):-90Confidence Factor:99.5%
Concentration Trend:Decreasing
Notes:
1.At least four independent sampling events per well are required for calculating the trend. Methodology is valid for 4 to 40 samples.
2.Confidence in Trend = Confidence (in percent) that constituent concentration is increasing (S>0) or decreasing (S<0): >95% = Increasing or Decreasing;
≥ 90% = Probably Increasing or Probably Decreasing; < 90% and S>0 = No Trend; < 90%, S≤0, and COV ≥ 1 = No Trend; < 90% and COV < 1 = Stable.
3.Methodology based on "MAROS: A Decision Support System for Optimizing Monitoring Plans", J.J. Aziz, M. Ling, H.S. Rifai, C.J. Newell, and J.R. Gonzales,
Ground Water, 41(3):355-367, 2003.
DISCLAIMER: The GSI Mann-Kendall Toolkit is available "as is". Considerable care has been exercised in preparing this software product; however, no party, including without
limitation GSI Environmental Inc., makes any representation or warranty regarding the accuracy, correctness, or completeness of the information contained herein, and no such
party shall be liable for any direct, indirect, consequential, incidental or other damages resulting from the use of this product or the information contained herein. Information in
this publication is subject to change without notice. GSI Environmental Inc., disclaims any responsibility or obligation to update the information contained herein.
GSI Environmental Inc., www.gsi-net.com
CONCENTRATION (ug/l, ppb)
4-Jun-24
CSC Concrete
GSI MANN-KENDALL TOOLKIT
for Constituent Trend Analysis
Gene Mao
MW-14
1
10
100
07/98 04/01 01/04 10/06 07/09 04/12 12/14 09/17 06/20Co
n
c
e
n
t
r
a
t
i
o
n

(
u
g
/
l
,

p
p
b
)
Sampling Date
benzene