DERR-2024-007994

AGW-1
0
10,000
20,000
30,000
40,000
50,000
60,000
70,000
0
50,000
100,000
150,000
200,000
250,000
300,000
350,000
400,000
450,000
500,000
11/11/1994 11/11/1998 11/11/2002 11/11/2006 11/11/2010 11/11/2014 11/11/2018 11/11/2022
Benzene (µg/L)
TPH-GRO (µg/L)
Date
Chevron Facility No. 211535
Teasdale, Utah
Well AGW-1
TPH-GRO Benzene
CGW-11
0
500
1,000
1,500
2,000
2,500
3,000
3,500
4,000
4,500
0
5,000
10,000
15,000
20,000
25,000
10/1/1998 11/1/2001 12/1/2004 1/1/2008 2/1/2011 3/1/2014 4/1/2017 5/1/2020 6/1/2023
Benzene (µg/L)
TPH-GRO (µg/L)
Date
Chevron Facility No. 211535
Teasdale, Utah
Well CGW-11
TPH-GRO Benzene
CGW-12
0
1,000
2,000
3,000
4,000
5,000
6,000
7,000
8,000
0
20,000
40,000
60,000
80,000
100,000
120,000
140,000
10/2/1998 10/2/2001 10/2/2004 10/2/2007 10/2/2010 10/2/2013 10/2/2016 10/2/2019 10/2/2022 10/2/2025
Benzene (µg/L)
TPH-GRO (µg/L)
Date
Chevron Facility No. 211535
Teasdale, Utah
Well CGW-12
TPH-GRO Benzene
DGW-16
0
500
1,000
1,500
2,000
2,500
3,000
0
1,000
2,000
3,000
4,000
5,000
6,000
7,000
8,000
9,000
10,000
12/1/1998 9/1/2001 6/1/2004 3/1/2007 12/1/2009 9/1/2012 6/1/2015 3/1/2018 12/1/2020 9/1/2023
Benzene (µg/L)
TPH-GRO (µg/L)
Date
Chevron Facility No. 211535
Teasdale, Utah
Well DGW-16
TPH-GRO Benzene
FGW-17
0
200
400
600
800
1,000
1,200
0
1,000
2,000
3,000
4,000
5,000
6,000
7,000
8,000
9/1/2005 8/1/2007 7/1/2009 6/1/2011 5/1/2013 4/1/2015 3/1/2017 2/1/2019 1/1/2021 12/1/2022 11/1/2024
Benzene (µg/L)
TPH-GRO (µg/L)
Date
Chevron Facility No. 211535
Teasdale, Utah
Well FGW-17
TPH-GRO Benzene
AGW-2
0
10,000
20,000
30,000
40,000
50,000
60,000
0
100,000
200,000
300,000
400,000
500,000
600,000
700,000
800,000
11/11/1994 11/11/1996 11/11/1998 11/11/2000 11/11/2002 11/11/2004 11/11/2006 11/11/2008
Benzene (µg/L)
TPH-GRO (µg/L)
Date
Chevron Facility No. 211535
Teasdale, Utah
Well AGW-2
TPH-GRO Benzene
BGW-4A
0
10,000
20,000
30,000
40,000
50,000
60,000
70,000
80,000
90,000
100,000
0
100,000
200,000
300,000
400,000
500,000
600,000
700,000
800,000
900,000
2/15/1996 2/15/1998 2/15/2000 2/15/2002 2/15/2004 2/15/2006 2/15/2008
Benzene (µg/L)
TPH-GRO (µg/L)
Date
Chevron Facility No. 211535
Teasdale, Utah
Well BGW-4A
TPH-GRO Benzene
BGW-6
0
2,000
4,000
6,000
8,000
10,000
12,000
14,000
16,000
18,000
20,000
0
50,000
100,000
150,000
200,000
250,000
300,000
350,000
9/4/1998 9/4/1999 9/4/2000 9/4/2001 9/4/2002 9/4/2003 9/4/2004 9/4/2005 9/4/2006 9/4/2007
Benzene (µg/L)
TPH-GRO (µg/L)
Date
Chevron Facility No. 211535
Teasdale, Utah
Well BGW-6
TPH-GRO Benzene
BGW-7
0
5,000
10,000
15,000
20,000
25,000
30,000
0
50,000
100,000
150,000
200,000
250,000
300,000
350,000
9/4/1998 9/4/1999 9/4/2000 9/4/2001 9/4/2002 9/4/2003 9/4/2004 9/4/2005 9/4/2006 9/4/2007 9/4/2008
Benzene (µg/L)
TPH-GRO (µg/L)
Date
Chevron Facility No. 211535
Teasdale, Utah
Well BGW-7
TPH-GRO Benzene
BGW-8
0
1,000
2,000
3,000
4,000
5,000
6,000
0
5,000
10,000
15,000
20,000
25,000
30,000
35,000
40,000
9/4/1998 9/4/1999 9/4/2000 9/4/2001 9/4/2002 9/4/2003 9/4/2004 9/4/2005 9/4/2006 9/4/2007 9/4/2008
Benzene (µg/L)
TPH-GRO (µg/L)
Date
Chevron Facility No. 211535
Teasdale, Utah
Well BGW-8
TPH-GRO Benzene
BGW-9
0
5,000
10,000
15,000
20,000
25,000
0
10,000
20,000
30,000
40,000
50,000
60,000
70,000
80,000
90,000
100,000
9/4/1998 9/4/1999 9/4/2000 9/4/2001 9/4/2002 9/4/2003 9/4/2004 9/4/2005 9/4/2006 9/4/2007 9/4/2008
Benzene (µg/L)
TPH-GRO (µg/L)
Date
Chevron Facility No. 211535
Teasdale, Utah
Well BGW-9
TPH-GRO Benzene
CGW-10
0
1,000
2,000
3,000
4,000
5,000
6,000
7,000
8,000
0
10,000
20,000
30,000
40,000
50,000
60,000
10/1/1998 12/1/1999 2/1/2001 4/1/2002 6/1/2003 8/1/2004 10/1/2005 12/1/2006 2/1/2008
Benzene (µg/L)
TPH-GRO (µg/L)
Date
Chevron Facility No. 211535
Teasdale, Utah
Well CGW-10
TPH-GRO Benzene
CGW-13
0
100
200
300
400
500
600
700
800
900
1,000
0
50,000
100,000
150,000
200,000
250,000
300,000
350,000
10/2/1998 10/2/2000 10/2/2002 10/2/2004 10/2/2006 10/2/2008
Benzene (µg/L)
TPH-GRO (µg/L)
Date
Chevron Facility No. 211535
Teasdale, Utah
Well CGW-13
TPH-GRO Benzene
DGW-15
0
50
100
150
200
250
300
350
400
450
0
5,000
10,000
15,000
20,000
25,000
30,000
12/1/1998 12/1/1999 12/1/2000 12/1/2001 12/1/2002 12/1/2003 12/1/2004 12/1/2005 12/1/2006
Benzene (µg/L)
TPH-GRO (µg/L)
Date
Chevron Facility No. 211535
Teasdale, Utah
Well DGW-15
TPH-GRO Benzene
VM-6
0
200
400
600
800
1,000
1,200
0
2,000
4,000
6,000
8,000
10,000
12,000
14,000
16,000
18,000
20,000
12/1/2001 10/1/2002 8/1/2003 6/1/2004 4/1/2005 2/1/2006 12/1/2006 10/1/2007 8/1/2008
Benzene (µg/L)
TPH-GRO (µg/L)
Date
Chevron Facility No. 211535
Teasdale, Utah
Well VW-6
TPH-GRO Benzene
ZSW-1
0
5
10
15
20
25
0
0
0
0
0
1
1
1
1
1
1
2/1/1999 10/1/1999 6/1/2000 2/1/2001 10/1/2001 6/1/2002 2/1/2003 10/1/2003 6/1/2004 2/1/2005 10/1/2005
Benzene (µg/L)
TPH-GRO (µg/L)
Date
Chevron Facility No. 211535
Teasdale, Utah
Well ZSW-1
TPH-GRO Benzene