Los Angeles, CA NATTS Network Assessment Review
• Established 2007: Carbonyls, Chromium VI, PAHs, PMio Metals, and VOCs
o Chromium VI ended in in 2014
• For the NATTS Network Assessment (2007-2018):
o 16 of 18 Method Quality Objective (MQO) Core HAPs were included in the national trends
¦ Vinyl Chloride: Low completeness (under 75%) in 2016.
¦ Carbon Tetrachloride: High Bias (outside ±35%) AND completeness was 79% in 2016.
o 191 of 210 pollutant datasets were suitable for trends analysis
o Annual Average and 3-Year Rolling Average Concentrations were generally flat over time, with the
exception of a few pollutants (benzene, 1,3-butadiene, chromium VI, naphthalene, tetrachloroethylene,
and trichloroethylene).
o 100% Reporting of Datasets
• Method Quality Objectives (MQO): 2007-2018
o Completeness: Met 85% completeness in 183 of 212 pollutant datasets
o Method Detection Limits: Met MDL Target Ratio of 1.00 in 191 of 215 pollutant datasets
o Bias: Met ±25% for 124 of 146 pollutant datasets
o Overall Method Precision: Met <15% CV for 81 of 157 pollutant datasets
o Analytical Method Precision: Met <15% CV for 103 of 141 pollutant datasets
• Analytical Laboratories for 2018
voc
Carbonyl
PMio Metals
Chromium VI
PAHs
SCAQMD
SCAQMD
SCAQMD
NA
ERG
• Equipment Year Deployed
Equipment Type
VOC
Carbonyl
PMio Metals
Chromium VI
PAHs
Sampler
2004
2018
2018
2007
2016
Analytical
2006
1999
2010
2007
2014
Preconcentrator
2017
NA
NA
NA
NA
Standards Preparation
2018
NA
NA
NA
NA
Canister Cleaning
2007
NA
NA
NA
NA
Extraction
NA
NA
2009
<2000
2004
-------
National Summary: NATTS data were collected at 27 locations across the United States,
with sites beginning in 2003 or later (Figure 1) for 19 core HAPs. Over 528,000 concentrations
(primary, secondary, and replicate) were generated and analyzed for this assessment. Pollutant
datasets were scored to assess whether they were suitable for trends analysis. Each
pollutant dataset was evaluated against four MQOs: Completeness; Sensitivity; Bias; and
Precision. Datasets that were suitable (A- or B-rated) for six consecutive years were used for
national trends analysis (Table 1).
National trends were determined by comparing the most recent 3-year blocked averages
(e.g., 2013-2015 vs. 2016-2018) to determine if the NATTS Trends DQO was being met:
To be able to detect a al5percent difference (trend) between the annual mean
concentrations of successive 3-year periods within acceptable levels of decision error.
Of the 19 core HAPs. 18 were assessed for the NATTS Trends DQO. Due to sampling and
analytical issues, acrolein was not considered for trends analysis (Table 2). This assessment
showed that across the network, 15 of those 18 pollutants were decreasing between the
3-year blocks, while two of those pollutants were increasing between the 3-year blocks.
One pollutant did not exhibit a trend.
Table 1. NATTS Network Assessment: Count and Percentage of Suitable
Datasets by Pollutant Group
Pollutant Group
A-rated
B-rated
Does Not Meet
#
%
#
%
#
%
VOCs
1,452
53%
737
27%
555
20%
Carbonyls
523
67%
193
25%
66
8%
PM10 Metals
1,418
61%
685
30%
213
9%
Chromium VI
159
74%
29
13%
27
13%
PAHs
410
74%
124
22%
18
3%
Total = 6,609
3,962
60%
1,768
27%
879
13%
Table 2. Three-Year Block Averages for National Trends
Pollutant
Units
# Sites
Block 1
Block 2
% Difference
Acetaldehyde
Hg/m3
19
1.51
1.39
-7.7%
Arsenic (PM10)
ng/m
21
0.71
0.68
-3.2%
Benzene
Hg/m3
19
0.65
0.59
-10.2%
Figure 1. NATTS Site and Year Established
Benzo(a)pyrene
ng/m3
21
0.113
0.087
-23.2%
Seattle, ,
Beryllium (PM10)
ng/m3
20
0.012
0.009
-26.4%
Butadiene, 1,3-
Hg/m3
19
0.071
0.063
-10.9%
Portland (#1), OR* Portland (#2), OR _ ^ / \
• > ' \ ; " I I >
Cadmium (PM10)
ng/m3
21
0.170
0.097
-43.0%
* »•* l | - Underbill.Vt
/l_a Grande (#1), OR*-' '"•••JL. • _ _ j ,,l M/ i ' \ f
} /. a V«?i-7S»" I s ') H or icon.' Wit' \ \ "-Roxbury. MA
j... ¦ La Grande (#2), OR i f c-/ . * ] Rochester, NY \ I ...-S
) / ; I | May ville.Wr >f, \~ V
/ i ! I -->.#/ \ Detroit; Ml f
- — — ; I i J \ j X. Providence, Rl
f / Bountiful'UT | X — \ ^f- .Bronx (#1), NY"
\ 1 ™ . \ Chicago, IL ¦ ; _ j \ S
_ X \ ' . 1, , Washington^D.C. "w
SanJoBB.CA j [ ^
, Grand Junction. CO V St Louis MO Grayson Lake. KY J ' Bronit (#2), NV"
\ \ _ ' 1 v. U-.--.'1" . ,-.v * Richmond. -VA
S \ _ : i . \ i i*/ '
. . . \ ' v • - — -1 _ Vs Hazard, KY*--^-""?" / j
Los Angeles, CA \J ; j_ | _ J _ r - "[¦/
- Rubidoux, CA i / £' y-""" /
• X: / >' ' 1 / T \Chesterf ield, SC
NATTS Sites phoenix.AZ / ; —J / 1 j. /
; i Karnack, TX ) South DeKalb, GA y
~ Rural \ j | J , > /
O Urban X \ t ; \ ,r(
NATTS - Year Established Houston, ri ^\
| 2003 "^T.mp,.FL
¦ 2004 \ Pinellas County, FL, 'i
1 "> ./ 'i. 1
¦ 2007 1 >
"ft
¦ 2008
| | 2009
2010
2016
?ni7 * The Hazare|. Mayville, Wl, La Grande <#1), OR, Portland (#1), OR, sites were relocated in 2008, 2009, 2016, and 2017, respectively.
"The Bronx (#1), NY site temporarily moved to the Bronx (#2), NY site from mid-2010 to mid-2012.
Carbon Tetrachloride
Hg/m3
15
0.59
0.56
-4.7%
Chloroform
Hg/m3
20
0.256
0.255
-0.4%
Chromium VI
ng/m
18
0.029
0.026
-7.7%
Formaldehyde
Hg/m3
19
2.77
2.68
-3.3%
Lead (PM10)
ng/m
21
3.08
2.81
-8.9%
Manganese (PM10)
ng/m3
20
8.06
7.93
-1.6%
Naphthalene
ng/m3
20
66.70
51.08
-23.4%
Nickel (PM10)
ng/m3
19
1.28
1.05
-18.0%
T etracliloroethylene
ng/m3
19
0.149
0.174
17.2%
T ricliloroethylene
ng/m3
19
0.020
0.022
10.7%
Vinyl Cliloride
ng/m3
17
0.0051
0.0048
-5.5%
Page 1 of 25
-------
NATTS Site Type Urban
AQS Site Code
06-037-1103
NATTS Operating Agency
South Coast AQMD
Longitude
-118.22688
AQS Land Use
Residential
AQS Location Setting
Urban/City Center
10-Mile Population
10,017,068
Region
County
Los Angeles
Latitude
34.06659
Site Information
NATTS Monitoring Site Report: Los Angeles, CA
Figure 2. NATTS Site Location
Pollutant Datasets Evaluation: Suita )le for Trends (Y=yes; Y(T
=yes, and usee
Final Pollutant Name
2003
2004
2005
2006
2007
2008
2009
2010
2011
2012
2013
2014
2015
2016
2017
2018
Acetaldehyde
—
—
..
~
Y
Y
Y
Y
Y
Y
Y(T)
Y(T)
Y(T)
Y(T)
Y(T)
Y(T)
Arsenic (PM10)
~
—
--
-
Y
Na
Y
Y
Y
Y
Y(T)
Y(T)
Y(T)
Y(T)
Y(T)
Y(T)
Benzene
~
~
~
Y
Y
Y
Y
Y
Y
Y(T)
Y(T)
Y(T)
Y(T)
Y(T)
Y(T)
Benzo(a)pyrene
—
—
~
—
--
Y
Y
Y
Y
Y
Y(T)
Y(T)
Y(T)
Y(T)
Y(T)
Y(T)
Beryllium (PM10)
~
~
~
--
Y
Na
Nb
Nb
Y
Y
Y(T)
Y(T)
Y(T)
Y(T)
Y(T)
Y(T)
Butadiene, 1,3-
~
—
~
—
Y
Y
Y
Y
Y
Y
Y(T)
Y(T)
Y(T)
Y(T)
Y(T)
Y(T)
Cadmium (PM10)
~
~
--
-
Y
Na
Y
Y
Y
Y
Y(T)
Y(T)
Y(T)
Y(T)
Y(T)
Y(T)
Carbon tetrachloride
—
~
—
-
Nb
Nb
Nb
Y
Y
Y
Y
Y
Y
Nc
Y
Y
Chloroform
—
—
~
~
Y
Y
Y
Y
Y
Y
Y(T)
Y(T)
Y(T)
Y(T)
Y(T)
Y(T)
Chromium VI
—
—
—
~
Y
Y
Y(T)
Y(T)
Y (T)
Y(T)
Y(T)
Y(T)
~
—
-
~
Formaldehyde
~
—
~
Y
Y
Y
Y
Y
Y
Y(T)
Y(T)
Y(T)
Y(T)
Y(T)
Y(T)
Lead (PM10)
~
—
--
—
Y
Na
Y
Y
Y
Y
Y(T)
Y(T)
Y(T)
Y(T)
Y(T)
Y(T)
Manganese (PM10)
~
--
-
--
Nb
Na
Y
Y
Y
Y
Y(T)
Y(T)
Y(T)
Y(T)
Y(T)
Y(T)
Naphthalene
—
—
~
—
~
Y
Y
Y
Y
Y
Y(T)
Y(T)
Y(T)
Y(T)
Y(T)
Y(T)
Nickel (P.Mjo)
~
—
~
-
Y
Na
Y
Y
Y
Y
Y(T)
Y(T)
Y(T)
Y(T)
Y(T)
Y(T)
T etrachloroethylene
~
--
..
~
Y
Y
Y
Y
Y
Y
Y(T)
Y(T)
Y(T)
Y(T)
Y(T)
Y(T)
T ri chl oroethylene
—
—
--
~
Y
Y
Y
Y
Y
Y
Y(T)
Y(T)
Y(T)
Y(T)
Y(T)
Y(T)
Vinyl chloride
~
~
-
--
Nb
Nb
Nb
Nb
Y
Nb
Y
Y
Y
Na
Y
Y
for DQO Trends; N=No; "=not rated
a: Completeness was less than 75% based on l-in-6 day sampling
b: Reported MDL to NATTS Target Ratio greater than 2.0
c: Bias Percent was outside of ±35%
Page 2 of 25
-------
Table 3. NATTS Network Assessment Data (2003-2018) - National Distribution Statistics By Type3
Analyte
Units
Site Type
# Data
Records
%
Detections
Arithmetic
Meanb
Percentile Value0
5th
10th
25th
50th
75th
90th
95th
Acetaldehyde
ng/m3
Urban
15,704
100%
1.77 ± 0.02
0.50
0.66
0.97
1.45
2.19
3.24
4.04
ng/m3
Rural
4,930
100%
1.20 ± 0.04
0.36
0.46
0.65
0.93
1.38
2.02
2.76
ng/m3
All Sites
20,634
100%
1.63 ± 0.02
0.44
0.58
0.86
1.31
2.00
3.02
3.86
Arsenic (PM10)
ng/m3
Urban
14,968
97%
0.89 ± 0.04
0.10
0.19
0.34
0.58
0.99
1.70
2.41
ng/m3
Rural
4,622
96%
0.49 ± 0.02
0.04
0.08
0.17
0.35
0.59
0.94
1.28
ng/m3
All Sites
19,590
97%
0.79 ± 0.03
0.06
0.14
0.29
0.52
0.89
1.54
2.19
Benzene
Hg/m3
Urban
15,984
99%
0.86 ± 0.01
0.25
0.30
0.43
0.66
1.05
1.64
2.21
Hg/m3
Rural
2,494
95%
0.43 ± 0.02
0.04
0.13
0.21
0.33
0.52
0.78
1.01
Hg/m3
All Sites
18,478
99%
0.81 ± 0.01
0.19
0.26
0.39
0.61
0.98
1.55
2.09
Benzo(a)pyrene
ng/m3
Urban
12,336
70%
0.096 ± 0.004
ND
ND
ND
0.04
0.11
0.24
0.37
ng/m3
Rural
3,179
36%
0.067 ± 0.009
ND
ND
ND
ND
0.02
0.13
0.37
ng/m3
All Sites
15,515
63%
0.090 ± 0.004
ND
ND
ND
0.03
0.10
0.23
0.37
Beryllium (PM10)
ng/m3
Urban
15,783
75%
0.051 ± 0.006
ND
ND
0.00003
0.005
0.018
0.050
0.101
ng/m3
Rural
4,687
49%
0.023 ± 0.003
ND
ND
ND
ND
0.005
0.017
0.072
ng/m3
All Sites
20,470
69%
0.045 ± 0.005
ND
ND
ND
0.003
0.012
0.049
0.100
Butadiene, 1,3-
Hg/m3
Urban
15,388
81%
0.092 ± 0.002
ND
ND
0.025
0.058
0.114
0.215
0.302
ng/m3
Rural
2,185
29%
0.012 ± 0.001
ND
ND
ND
ND
0.017
0.046
0.059
ng/m3
All Sites
17,573
75%
0.082 ± 0.002
ND
ND
ND
0.049
0.104
0.199
0.287
Cadmium (PM10)
ng/m3
Urban
16,360
92%
0.21 ± 0.02
ND
0.01
0.05
0.09
0.17
0.42
0.63
ng/m3
Rural
4,684
87%
0.10 ± 0.01
ND
ND
0.03
0.06
0.11
0.20
0.29
ng/m3
All Sites
21,044
91%
0.18 ± 0.01
ND
0.01
0.04
0.08
0.16
0.35
0.56
Carbon Tetrachloride
ng/m3
Urban
14,713
99%
0.569 ± 0.003
0.361
0.433
0.496
0.562
0.651
0.737
0.798
ng/m3
Rural
2,189
92%
0.534 ± 0.016
ND
0.180
0.402
0.537
0.633
0.727
0.798
ng/m3
All Sites
16,902
98%
0.565 ± 0.003
0.304
0.408
0.490
0.559
0.649
0.736
0.798
Chloroform
ng/m3
Urban
16,068
87%
0.265 ± 0.022
ND
ND
0.093
0.132
0.217
0.420
0.668
ng/m3
Rural
3,802
43%
0.052 ± 0.003
ND
ND
ND
ND
0.095
0.144
0.230
ng/m3
All Sites
19,870
79%
0.224 ± 0.018
ND
ND
0.064
0.113
0.196
0.364
0.586
Chromium VI
ng/m3
Urban
8,414
74%
0.036 ± 0.002
ND
ND
ND
0.020
0.042
0.081
0.120
ng/m3
Rural
2,586
41%
0.018 ± 0.004
ND
ND
ND
ND
0.017
0.031
0.051
ng/m3
All Sites
11,000
66%
0.032 ± 0.001
ND
ND
ND
0.016
0.036
0.073
0.114
Page 3 of 25
-------
Table 3. NATTS Network Assessment Data (2003-2018) - National Distribution Statistics By Type3
Analyte
Units
Site Type
# Data
Records
%
Detections
Arithmetic
Meanb
Percentile Value0
5th
10th
25th
50th
75th
90th
95th
Formaldehyde
ng/m3
Urban
16,118
100%
3.11 ± 0.04
0.66
0.99
1.60
2.47
3.84
5.63
7.25
ng/m3
Rural
5,002
100%
2.22 ± 0.05
0.53
0.68
1.06
1.69
2.74
4.19
5.45
ng/m3
All Sites
21,120
100%
2.90 ± 0.04
0.61
0.86
1.43
2.29
3.59
5.38
6.96
Lead (PM10)
ng/m3
Urban
16,366
100%
4.21 ± 0.13
0.72
0.98
1.55
2.64
4.56
8.35
11.90
ng/m3
Rural
4,680
99%
2.10 ± 0.16
0.37
0.50
0.84
1.41
2.37
3.91
5.36
ng/m3
All Sites
21,046
99%
3.74 ± 0.11
0.55
0.80
1.31
2.31
4.04
7.41
10.56
Manganese (PM10)
ng/m3
Urban
16,141
100%
9.80 ± 0.32
1.09
1.51
2.52
4.92
10.21
20.10
30.08
ng/m3
Rural
4,627
99%
3.96 ± 0.14
0.46
0.73
1.36
2.57
4.75
8.54
12.13
ng/m3
All Sites
20,768
100%
8.50 ± 0.25
0.85
1.23
2.15
4.18
8.89
17.98
26.70
Naphthalene
ng/m3
Urban
12,332
100%
74.63 ± 1.14
15.62
21.27
33.55
55.89
94.64
150.05
196.16
ng/m3
Rural
3,301
100%
24.47 ± 1.38
3.74
4.73
7.74
13.86
26.25
50.88
79.17
ng/m3
All Sites
15,633
100%
64.04 ± 1.00
6.58
10.92
23.37
45.59
83.31
137.54
181.75
Nickel (PM10)
ng/m3
Urban
16,125
97%
1.85 ± 0.05
0.25
0.41
0.67
1.11
2.00
3.52
5.27
ng/m3
Rural
4,623
85%
0.65 ± 0.08
ND
ND
0.10
0.28
0.64
1.15
1.89
ng/m3
All Sites
20,748
94%
1.58 ± 0.04
ND
0.15
0.47
0.92
1.73
3.14
4.74
T etrachloroethylene
Hg/m3
Urban
15,612
86%
0.25 ± 0.01
ND
ND
0.06
0.13
0.25
0.48
0.74
Hg/m3
Rural
2,272
36%
0.09 ± 0.04
ND
ND
ND
ND
0.04
0.08
0.16
Hg/m3
All Sites
17,884
79%
0.23 ± 0.01
ND
ND
0.04
0.11
0.22
0.44
0.70
T richloroethylene
Hg/m3
Urban
15,843
41%
0.040 ± 0.002
ND
ND
ND
ND
0.051
0.107
0.164
ng/m3
Rural
3,388
13%
0.021 ± 0.003
ND
ND
ND
ND
ND
0.017
0.250
ng/m3
All Sites
19,231
36%
0.037 ± 0.002
ND
ND
ND
ND
0.041
0.105
0.167
Vinyl Chloride
ng/m3
Urban
14,778
19%
0.0044 ± 0.0003
ND
ND
ND
ND
ND
0.0137
0.0257
ng/m3
Rural
2,444
8%
0.0040 ± 0.0009
ND
ND
ND
ND
ND
ND
0.0156
ng/m3
All Sites
17,222
17%
0.0043 ± 0.0003
ND
ND
ND
ND
ND
0.0126
0.0254
3 Statistics presented are from pollutant datasets which were suitable for trends.
b The arithmetic mean is the average of all samples results which include actual measured values. If no chemical was registered, then a value of zero is
used when calculating the mean.
c ND: No results of this chemical were registered by the laboratory analytical equipment.
Page 4 of 25
-------
Table 4. Summary Statistics for Los Angeles, CA
Analyte
Units
# Data
Records
%
Detection
Arithmetic Mean3
Percentile Va
b
ue
5th
10th
25th
50th
75th
90th
95th
Acetaldehyde
(ig/m3
702
100%
2.17 ± 0.10
0.57
0.76
1.17
1.84
2.83
3.93
4.87
Arsenic (PM10)
ng/m3
671
98%
0.89 ± 0.28
0.12
0.20
0.31
0.50
0.80
1.40
2.31
Benzene
(ig/m3
668
100%
1.21 ± 0.06
0.39
0.47
0.69
1.03
1.54
2.18
2.59
Benzo(a)pyrene
ng/m3
688
71%
0.07 ± 0.01
ND
ND
ND
0.03
0.07
0.17
0.26
Beryllium (PM10)
ng/m3
671
74%
0.29 ± 0.09
ND
ND
ND
0.01
0.02
0.10
1.70
Butadiene, 1,3-
l-tg/m3
667
92%
0.15 ± 0.01
ND
0.04
0.07
0.13
0.22
0.32
0.41
Cadmium (PM10)
ng/m3
671
91%
0.17 ± 0.02
ND
0.02
0.07
0.10
0.20
0.30
0.60
Carbon Tetrachloride
l-tg/m3
665
99%
0.50 ± 0.01
0.38
0.42
0.45
0.51
0.56
0.59
0.64
Chloroform
l-tg/m3
667
99%
0.175 ± 0.007
0.097
0.098
0.102
0.150
0.204
0.288
0.339
Chromium VI
ng/m3
618
100%
0.08 ± 0.01
0.02
0.03
0.04
0.06
0.10
0.15
0.21
Formaldehyde
l-tg/m3
705
100%
4.52 ± 0.18
1.45
1.99
3.00
4.22
5.53
7.30
8.41
Lead (PM10)
ng/m3
671
100%
5.67 ± 0.39
0.01
1.67
2.98
4.60
7.28
10.00
12.60
Manganese (PM10)
ng/m3
671
99%
13.46 ± 0.76
1.05
3.66
7.00
11.10
18.60
24.00
30.00
Naphthalene
ng/m3
688
100%
115.45 ± 6.09
34.44
41.62
60.93
91.96
148.80
215.25
261.17
Nickel (PM10)
ng/m3
668
99%
3.65 ± 0.64
0.60
0.90
1.32
2.00
3.11
7.00
10.00
T etrachloroethylene
l-tg/m3
666
92%
0.199 ± 0.012
ND
0.067
0.071
0.140
0.271
0.408
0.487
T richloroethylene
l-tg/m3
667
65%
0.089 ± 0.011
ND
ND
ND
0.054
0.110
0.215
0.327
Vinyl Chloride
l-tg/m3
599
4%
0.0010 ± 0.0004
ND
ND
ND
ND
ND
ND
ND
3 :The arithmetic mean is the average of all samples results which included actual measured values. If no chemical was registered, then a value of zero is used.
bND: No results of this chemical were registered by the laboratory analytical equipment.
Table 5. Analytical Labs Supporting this Site
Pollutant Group
2007
2008
2009
2010
2011
2012
2013
2014
2015
2016
2017
2018
VOCs
SCAQMD
SCAQMD
SCAQMD
SCAQMD
SCAQMD
SCAQMD
SCAQMD
SCAQMD
SCAQMD
SCAQMD
SCAQMD
SCAQMD
Carbonyls
SCAQMD
SCAQMD
SCAQMD
SCAQMD
SCAQMD
SCAQMD
SCAQMD
SCAQMD
SCAQMD
SCAQMD
SCAQMD
SCAQMD
PM10 Metals
SCAQMD
SCAQMD
SCAQMD
SCAQMD
SCAQMD
SCAQMD
SCAQMD
SCAQMD
SCAQMD
SCAQMD
SCAQMD
SCAQMD
Chromium VI
CARB
CARB
CARB
CARB
CARB
CARB
CARB
CARB
-
-
-
—
PAHs
ERG
ERG
ERG
ERG
ERG
ERG
ERG
ERG
ERG
ERG
ERG
ERG
Not Applicable
SCAQMD: South Coast Air Quality Management District ERG: Eastern Research Group, Inc.
CARB: California Air Resources Board
Page 5 of 25
-------
4.00
3.20
B
~St>
a.
c
o
2.40
1.60
§
o
c
o
U
0.80
0.00
Figure 3. Los Angeles, CA Annual Average Concentrations
Los Angeles, CA
Annual Averages:
Acetaldehyde
-H
"T $ {"
1-?
2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018
Year
10.00
8.00
E
e
e
o
6.00
4.00
c
o
o
c
o
U
2.00
0.00
Los Angeles, CA
Annual Averages:
Arsenic (PM,0)
2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018
Year
B
e
o
c3
2.5
2.0
1.5
1.0
8
g 0.5
o
U
0.0
Los Angeles, C A
Annual Averages:
Benzene
m i
2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018
Year
S
c
c
o
c
O
c
o
U
0.15
0.12
0.09 -
0.06
0.03
0.00
Los Angeles, CA
Annual Averages:
Benzo(a)pyrene
o <~
I
2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018
Year
Page 6 of 25
-------
Figure 3. Los Angeles, CA Annual Average Concentrations
Los Angeles, CA
Annual Averages:
Beryllium (PM,0)
0.30
Los Angeles, CA
Annual Averages:
1,3-Butadiene
0.050
0.24
0.040
"k
C")
S
3-0 18
—<
» ,
<
~
<
<
~
~
S 0.030
O
"cd
<
~
c
o
2 0.12
o T
L <~ T
° <~ O T
£ 0.020
§
o
a
o
^ I * * i
-i—>
a
S3
o
^ 0.06 ¦
,r 1 J- 1 n
u 0.010
1 ? i
*
0 00
0.000
2007
i
2008
2009
i i i i i i , i i
2010 2011 2012 2013 2014 2015 2016 2017 2018
Year
2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018
Year
Los Angeles, CA
Annual Averages:
Cadmium (PMI0)
1.0
^ 0.8
Los Angeles, CA
Annual Averages:
Carbon Tetrachloride
1.00
^ 0.80
'e
"b
3 0.6 -
•S 0.60
C
o
~
c
_o
2 0.4 -
~ i « J ~ i
* .
£ 0.40
c
-------
Figure 3. Los Angeles, CA Annual Average Concentrations
E
c
o
c
o
U
0.30
0.24
0.18
0.12
0.06
0.00
rm
Los Angeles, CA
Annual Averages:
Chloroform
LA
2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018
Year
10.0
£
c
o
c
u
C
o
U
8.0
6.0
4.0
2.0
0.0
I
Los Angeles, CA
Annual Averages:
Formaldehyde
i i i
i " i
4-
2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018
Year
0.200
_ 0.160
m
£
3, 0.120
G
O
g 0.080
H
C
o
9
g 0.040
u
0.000
2007
2008
Los Angeles, CA
Annual Averages:
Hexavalent Chromium
i—i
*
I
2009
2010 2011
Year
2012
2013
2014
20.0
16.0
S
"ts
c
o
c
o
o
a
o
U
12.0
8.0
4.0
0.0
Los Angeles, CA
Annual Averages:
Lead (PM10)
f
i
i
2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018
Year
Page 8 of 25
-------
Figure 3. Los Angeles, CA Annual Average Concentrations
20.0
E
c
o
c
e
o
a
-------
0.40
0.32
B
1ft
0.24
e
o
C3 0.16
c
-------
Figure 4. Los Angeles, CA - 3-Year Rolling Average Concentrations
1.0
Los Angeles, CA
3-Year Rolling Averages:
Arsenic (PM10)
0.8
0.6
t
SD
C
c
o
2 0.4
c
o
c
o
° 0.2
* * * *
0.0 +—
~
Years
v0// ^ ^ ^
3.5
2.8
2.1
1.4
0.7
Los Angeles, CA
3-Year Rolling Averages:
Acetaldehyde
bX)
G
C
o
c
-------
Figure 4. Los Angeles, CA - 3-Year Rolling Average Concentrations
ao
c
0.15
0.12
0.09
C
to
"3
Vh
g 0.06
o
c
o
U
0.03
0.00
Los Angeles, CA
3-Year Rolling Averages:
Benzo(a)pyrene
I
f
n
3°0? *°0g 3°0g *Oj 20j
-------
Figure 4. Los Angeles, CA - 3-Year Rolling Average Concentrations
ao
2.0
1.6
1.2
c
o
v-
S 0.8
o
c
o
U
0.4
0.0
0.30
0.24
£
=L 0.18
c
o
-4—»
C3
S 0-12
o
c
o
U
0.06
0.00
Los Angeles, CA
3-Year Rolling Averages:
Benzene
1 F
* J f
4-
*
* * i
X,
io/? /g
Years
Los Angeles, CA
3-Year Rolling Averages:
1,3-Butadiene
Li
^ ^ ^ ^ ^ ^
^°Og °/0 ^°/j "°/s ~~°/6 -°/? ^O/g
Years
Page 13 of 25
-------
Figure 4. Los Angeles, CA - 3-Year Rolling Average Concentrations
Los Angeles, CA
3-Year Rolling Averages:
Cadmium (PM,0)
S
s
o
0.20
0.16
0.12
g 0.08
s
o
U
0.04
0.00
i
~ ~ T ~-
"°0(J -%
i
<9.-, 70o
-------
Figure 4. Los Angeles, CA - 3-Year Rolling Average Concentrations
0.25
0.20
zi.
C 0.15
o
g
a o.io
S
O
U
0.05
0.00
Los Angeles, CA
3-Year Rolling Averages:
Chloroform
* i
*
*
i i
i
^ -?% / 2o, 20j
^00g %q
Years
6.0
f
w 3.6
e
_o
ca
s-
£ 2.4
(U
o
c
o
U
1.2
0.0
Los Angeles, CA
3-Year Rolling Averages:
Formaldehyde
+
* » » '
t M t
i
^R., ^ ^ ^
°Og °/q °/j °/j °J3 °/j °/S °/6 °/? °/,
-------
Figure 4. Los Angeles, CA - 3-Year Rolling Average Concentrations
0.15
Los Angeles, CA
3-Year Rolling Averages:
Hexavalent Chromium
s?
a
o
0.12
0.09
§ 0.06
o
C
o
U
4 ¥
0.03
0.00
->0,
'Og
%
*0.
'>0
lo,
%
*o.
~^0
'fK
'//
o
/«
K?0.
''8
Years
Page 16 of 25
-------
Figure 4. Los Angeles, CA - 3-Year Rolling Average Concentrations
Los Angeles, CA
3-Year Rolling Averages:
Manganese (PM10)
20.0 —
16.0
j5P 12.0
e
o
a
n «*.
'0*0 *°//
%
Years
\
3°J3 *0,
^0, 3^o, ^0, S^0.
'/« -"'S ^6 *°ig
Los Angeles, CA
3-Year Rolling Averages:
Naphthalene
200.0
160.0
60
c
c
o
120.0
e5 80.0
H
-4—»
e
0/-, «?©,, -?0/ 2o,
<•%> ^ ^ ^ ^ <"%
^ ^Oy0 2oJ} 2oJ:> /? ^ r ^ <^/. "?0,
Years
"Ar %•
Page 17 of 25
-------
Figure 4. Los Angeles, CA - 3-Year Rolling Average Concentrations
6.0 -r—
Los Angeles, CA
3-Year Rolling Averages:
Nickel (PM10)
4.8
&o
C
CJ
O
-------
Figure 4. Los Angeles, CA - 3-Year Rolling Average Concentrations
0.20
Los Angeles, CA
3-Year Rolling Averages:
Trichloroethylene
0.16
oo
3 0.12
c
0
ts
1 0.08
o
c
o
U
0.04
i
i—f
0.00
^o. "V,. ^ -'"'J.,. ^ ^
^ ^
Years
Los Angeles, CA
3-Year Rolling Averages:
Vinyl Chloride
0.0035
0.0028
00
3 0.0021
c
o
c
o
o
c
o
u
0.0014
0.0007
0.0000
-o0?
*4
%
«P
«.
*0.
V(J
'o
-2o.
*o.
'//
*0,
'
-------
Table 6. NATTS Network Assessment: MQO#l - Completeness Percentage at Los Angeles, CA
Pollutant Group
Year
2007
2008
2009
2010
2011
2012
2013
2014
2015
2016
2017
2018
Carbonyl
Acetaldehyde
115
100
98
97
100
79
98
98
98
98
97
75
Carbonyl
Formaldehyde
115
102
98
98
100
79
98
98
98
100
97
75
Chromium VI
Chromium VI
85
100
102
100
98
97
100
97
--
--
--
--
PAH
Benzo(a)pyrene
--
100
98
97
97
98
95
92
95
100
95
98
PAH
Naphthalene
-
100
98
97
97
98
95
92
95
100
95
98
PM10 Metals
Arsenic (PM10)
85
69
93
92
97
98
98
95
97
98
98
90
PM10 Metals
Beryllium (PM10)
85
69
93
92
97
98
98
95
97
98
98
90
PM10 Metals
Cadmium (PM10)
85
69
93
92
97
98
98
95
97
98
98
90
PM10 Metals
Lead (PM10)
85
69
93
92
97
98
98
95
97
98
98
90
PM10 Metals
Manganese (PM10)
85
69
93
92
97
98
98
95
97
98
98
90
PM10 Metals
Nickel (PM10)
85
69
93
92
97
98
93
95
97
98
98
90
voc
Benzene
92
97
98
89
90
84
93
92
92
77
102
95
voc
Butadiene, 1,3-
92
97
98
89
90
84
93
92
92
75
102
95
voc
Carbon tetrachloride
98
97
97
89
90
84
93
92
92
79
100
95
voc
Chloroform
92
97
98
89
90
84
93
92
88
79
102
95
voc
T etrachloroethylene
92
97
98
89
90
84
93
92
88
79
102
93
voc
T richloroethylene
92
97
98
89
90
84
93
92
88
79
102
95
voc
Vinyl chloride
98
97
97
82
77
67
79
82
82
52
93
90
A-rated: >85%
B-rated: Between 75% to 85%
Does not meet: <75%
No data available
Page 20 of 25
-------
Table 7. NATTS Network Assessment: MQO#2 - Reported Method Detection Limits (MDLs) at Los Angeles, CA
Pollutant
Group
Pollutant Name
Target
MDL
Units
2007
2008
2009
2010
2011
2012
2013
2014
2015
2016
2017
2018
Carbonyl
Acetaldehyde
0.45
pg/m3
0.40
0.40
0.40
0.40
0.02
0.02
0.02
0.02
0.04
0.08
0.02
0.08
Carbonyl
Formaldehyde
0.98/0.08a
Ug/m3
0.13
0.13
0.13
0.13
0.03
0.03
0.31
0.31
0.25
0.36
0.25
0.36
Chromium VI
Chromium VI
0.08
ng/m"
0.25
0.25
0.25
0.25
0.25
0.08
0.08
0.05
--
--
--
--
PAH
Benzo(a)pyrene
0.91
ng/m"
0.07
0.07
0.07
0.04
0.05
0.05
0.04
0.03
0.11
0.05
0.02
0.01
PAH
Naphthalene
29.00
ng/m"
0.002
0.015
0.009
0.011
0.003
0.004
0.005
0.012
0.005
0.021
0.056
0.058
PM10 Metals
Arsenic (PM10)
0.23
ng/m"
1.23
1.24
1.49
1.49
0.41
0.04
0.04
0.04
0.12
0.08
0.08
0.12
PM10 Metals
Beryllium (PM10)
0.42
ng/m"
1.12
1.13
2.52
2.52
0.22
0.02
0.02
0.02
0.068
0.046
0.023
0.023
PM10 Metals
Cadmium (PM10)
0.56
ng/m"
0.24
0.24
0.19
0.19
0.17
0.04
0.03
0.03
0.034
0.034
0.034
0.017
PM10 Metals
Lead (PM10)
15.0
ng/m"
0.011
0.011
0.017
0.017
0.006
0.001
0.001
0.001
0.009
0.009
0.003
0.003
PM10 Metals
Manganese (PM10)
5.0
ng/m"
2.65
2.65
0.16
0.156
0.02
0.004
0.004
0.004
0.03
0.03
0.05
0.04
PM10 Metals
Nickel (PM10)
2.1
ng/m"
0.10
0.10
0.15
0.154
0.04
0.05
0.05
0.05
0.20
0.22
0.15
0.15
voc
Benzene
0.13
l-tg/m"
1.23
1.23
1.23
1.23
0.64
0.64
0.64
0.64
0.98
0.98
0.49
0.25
voc
Butadiene, 1,3-
0.10
l-tg/m"
0.88
0.88
0.88
0.88
0.62
0.62
0.62
0.58
0.58
0.66
0.44
0.44
voc
Carbon tetrachloride
0.17
l-tg/m"
3.70
3.70
3.70
0.74
0.74
0.74
0.74
0.74
0.74
0.74
0.37
0.37
voc
Chloroform
0.50
l-tg/m"
0.20
0.20
0.20
0.20
0.20
0.20
0.20
0.20
0.20
0.20
0.20
0.10
voc
Tetrachloroethylene
0.17
l-tg/m"
0.40
0.40
0.40
0.40
0.40
0.40
0.40
0.40
0.40
0.40
0.40
0.40
voc
T richloroethylene
0.5/0.2a
l-tg/m"
0.21
0.21
0.21
0.21
0.21
0.21
0.54
0.54
0.54
0.54
0.54
0.27
voc
Vinyl chloride
0.11
l-tg/m"
2.32
2.32
2.32
2.32
1.19
1.19
1.19
0.79
0.79
0.70
0.93
0.23
A-rated: MDL to Target MDL ratio < 1
B-rated" MDL to Target MDL ratio between 1 and 2
Does Not Meet MDL to Target MDL ratio>2
No data available
a: For the 2012 sampling year, the Target MDL for this pollutant was reduced.
Page 21 of 25
-------
Table 8. NATTS Network Assessment: MQO#3 - Bias Percent Difference at Los Angeles, CA
Pollutant Group
Pollutant Name
2007
2008
2009
2010
2011
2012
2013
2014
2015
2016
2017
2018
Carbonyls
Acetaldehyde
a
a
-14.2
0.8
-2.8
b
41.4
-2.3
b
-2.9
4.5
-5.3
Carbonyls
Formaldehyde
a
a
-15.7
-3.5
-2.1
b
42.6
0.7
b
-12.5
0.9
6.2
Chromium VI
Chromium VI
b
b
b
c
b
18.0
-11.8
-8.9
--
--
--
--
PAH
Benzo(a)pyrene
b
b
-1.7
-2.3
-2.1
25.2
-5.7
-16.3
-14.2
-10.5
-22.4
-14.8
PAH
Naphthalene
b
b
-7.7
-17.1
-13.9
21.4
25.5
0.7
-11.4
-9.5
-11.6
-20.7
PM10 Metals
Arsenic (PM10)
a
a
-26.0
-11.6
-15.1
-1.6
-16.0
-9.4
b
-1.6
-12.0
-7.2
PM10 Metals
Beryllium (PM10)
a
a
-35.6
-18.0
-18.9
-1.9
-9.2
d
b
-5.5
-14.1
-9.4
PM10 Metals
Cadmium (PM10)
a
a
-27.9
-9.8
-13.8
-1.1
227.0
d
b
0.8
-15.4
-15.4
PM10 Metals
Lead (PM10)
a
a
-32.2
-7.7
-10.4
8.7
0.3
7.3
b
2.3
-11.6
-8.3
PM10 Metals
Manganese (PM10)
a
a
-40.2
-13.7
-14.5
8.5
-10.3
8.4
b
5.5
-5.5
0.6
PM10 Metals
Nickel (PM10)
a
a
-42.8
-11.2
-11.1
-8.1
-13.1
c
b
20.5
9.9
10.5
voc
Benzene
a
a
-17.6
e
9.8
b
1.9
5.7
OO
00
1
10.5
-17.9
-12.0
voc
Butadiene, 1,3-
a
a
-30.6
e
1.1
b
15.2
-5.3
-25.5
-5.6
-14.4
-13.6
voc
Carbon tetrachloride
a
a
-25.9
e
-5.1
b
3.2
-1.7
14.8
51.2
-4.6
-8.3
voc
Chloroform
a
a
-43.8
e
-12.4
b
14.0
-4.8
-10.5
14.9
-6.0
-8.6
voc
T etrachloroethylene
a
a
-19.5
e
9.4
b
-4.0
3.6
-25.6
-8.7
10.8
-4.7
voc
T richloroethylene
a
a
-32.8
e
-11.7
b
-3.7
-6.1
-30.6
-14.0
-28.9
-26.0
voc
Vinyl chloride
a
a
-26.8
e
-3.9
b
2.3
6.7
-5.1
1.7
-8.5
-7.5
A-rated:±25%
B-rated: Between 25% to 35% or between -25% to -35%
Does not meet:>35% or <35%
No data available
a: Due to lab constraints, EPA granted a 2-year waiver from participating the Proficiency Test program until 2009.
b: No Proficiency Test samples were sent for this pollutant and year.
c: Although a Proficiency Test sample was sent to the lab supporting this site and year, the results were nullified by
d: The Proficiency Test sample for this pollutant was 0; the site reported a concentration as "
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Table 9. NATTS Network Assessment: MQO#4 - Overall Method Precision %CV at Los Angeles, CA
Pollutant Group
Pollutant Name
Overall Methot
precision % CV
2007
2008
2009
2010
2011
2012
2013
2014
2015
2016
2017
2018
Carbonyls
Acetaldehyde
59.3
44.0
30.1
18.3
43.1
42.6
32.1
56.3
14.3
12.2
14.6
19.5
Carbonyls
Formaldehyde
45.8
47.8
34.7
19.3
25.8
34.7
19.5
34.4
16.6
13.6
10.5
14.9
Chromium VI
Chromium VI
40.8
27.6
19.2
30.3
35.3
47.5
42.0
57.6
--
—
--
—
PAH
Benzo(a)pyrene
--
--
--
—
--
—
--
—
--
—
--
—
PAH
Naphthalene
~
--
--
—
--
—
--
—
--
—
--
—
PM10 Metals
Arsenic (PM10)
28.6
14.0
34.0
7.9
17.1
13.4
2.3
4.6
3.3
12.6
8.6
5.9
PM10 Metals
Beryllium (PM10)
77.1
a
a
a
a
55.6
40.8
38.5
a
20.2
0
47.1
PM10 Metals
Cadmium (PM10)
41.6
28.3
38.9
a
5.4
29.8
10.3
10.9
4.9
27.4
3.8
9.8
PM10 Metals
Lead (PM10)
13.8
7.3
11.3
15.1
7.3
9.5
5.4
17.4
2.7
4.6
6.0
5.1
PM10 Metals
Manganese (PM10)
a
9.3
5.5
21.2
0.0
7.8
5.8
4.3
1.0
4.7
7.3
3.8
PM10 Metals
Nickel (PM10)
37.2
6.5
11.8
19.2
3.8
7.3
7.6
17.7
1.0
5.2
7.2
4.4
voc
Benzene
14.2
8.1
10.3
7.6
18.7
15.1
19.7
19.8
19.5
21.4
21.3
22.0
voc
Butadiene, 1,3-
30.3
14.2
23.6
20.9
51.7
28.6
14.6
33.0
25.2
28.5
14.6
28.9
voc
Carbon tetrachloride
a
a
0.0
a
14.3
8.3
10.1
12.4
15.0
17.0
13.9
15.9
voc
Chloroform
a
a
a
a
9.7
8.3
10.5
23.5
38.3
6.1
14.1
19.5
voc
T etrachloroethylene
a
5.3
10.9
17.4
9.5
0
11.8
25.2
a
0.0
29.6
26.9
voc
T richloroethylene
a
a
8.3
a
a
8.3
10.5
12.1
54.1
a
a
0
voc
Vinyl chloride
a
a
a
a
a
a
a
a
a
a
a
a
A-rated:< 15% CV
B-rated: Between 15%CV to25% CV
Does Not Meet: >25% CV or did not report Precision (required in the NATTS Workplan Template since 2012)
No data available
a: Although both primary and secondary data were reported, both sets of values were less than the MDL. Thus no %CV was calculated.
Page 23 of 25
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Table 10. NATTS Network Assessment: MQO#4 - Analytical Precision %CV at Los Angeles, CA
Pollutant Group
Pollutant Name
Analytica
Method precision % CV
2007
2008
2009
2010
2011
2012
2013
2014
2015
2016
2017
2018
Carbonyls
Acetaldehyde
--
—
—
—
2.8
1.6
1.1
0.9
1.1
1.8
0.8
0.5
Carbonyls
Formaldehyde
--
--
--
—
1.0
1.7
2.1
1.9
0.7
0.4
0.5
0.3
Chromium VI
Chromium VI
2.4
5.9
3.8
4.7
--
a
a
--
--
--
--
--
PAH
Benzo(a)pyrene
~
~
--
—
--
a
9.0
4.1
b
1.7
1.0
2.0
PAH
Naphthalene
~
~
--
—
--
11.4
2.0
3.7
2.6
2.4
2.3
2.0
PM10 Metals
Arsenic (PM10)
38.0
9.7
OO
*00
0
5.7
11.0
a
a
8.3
5.8
3.2
5.2
PM10 Metals
Beryllium (PM10)
10.2
b
b
b
b
0
a
a
b
20.2
27.5
0.0
PM10 Metals
Cadmium (PM10)
--
--
--
0
0
32.4
a
a
17.4
6.5
8.2
5.0
PM10 Metals
Lead (PM10)
8.0
4.0
0.7
12.9
4.2
10.4
a
a
2.7
1.2
1.4
0.8
PM10 Metals
Manganese (PM10)
~
1.3
3.7
0.0
21.1
8.6
a
a
3.7
2.1
1.0
0.9
PM10 Metals
Nickel (PM10)
22.2
6.5
6.4
38.5
3.3
7.5
a
a
4.3
5.0
3.2
3.7
voc
Benzene
--
5.1
3.5
5.3
2.6
4.0
4.5
3.5
5.2
4.2
3.2
3.5
voc
Butadiene, 1,3-
~
12.0
b
b
11.1
18.3
14.5
20.1
14.5
5.6
15.2
14.6
voc
Carbon tetrachloride
~
b
0
—
5.3
7.1
5.4
8.3
8.0
7.7
6.0
4.0
voc
Chloroform
~
b
b
b
b
b
0
b
0
0
15.7
5.7
voc
T etrachloroethylene
--
0
b
b
b
b
b
b
b
0
0
9.0
voc
T richloroethylene
~
b
7.7
b
b
b
7.4
17.7
0
0
b
0
voc
Vinyl chloride
~
b
b
b
b
b
b
b
b
b
b
b
A-rated:< 15% CV
B-rated: Between 15%CV to25% CV
Does Not Meet: >25% CV or did not report Precision (required in the NATTS Workplan Template since 2012)
No data available
a: Per the NATTS Workplan template, analytical replicates were required to be reported to AQS for this sampling year
b: The primary and/or replicate value were less than the MDL, so no calculation could be made.
Page 24 of 25
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Appendix A: Equipment Inventory
Pollutant Type
Year(s)
Manufacturer/Model, Extraction Type, and Year
Sampling Equipment
Carbonyls
2007-2017
RM Environmental Systems 924 Toxic Air Sampler (Year Deployed: 2004)
2018
ATEC 8000 (Year Deployed 2018)
Chromium VI
2007-2010
RM Environmental Systems 924 Toxic Air Sampler (Year Deployed: 2006)
2011-2014
RM Environmental Systems 924 Toxic Air Sampler (Year Deployed: 2007)
PAHs
2007-2015
Thermo Andersen GPS-1 PUF Sampler (Year Deployed: 2004)
2016-2018
TischPuf+ (Year Deployed: 2016)
PM10 Metals
2007-2017
Thermo-Andersen SSI PM10 Hi-VOL; Tisch TE-10557 sampler (Year Deployed: 2007)
2018
Tisch SSI+ (Year Deployed: 2018)
VOCs
2007-2018
Xontech 910A Canister Sampler (Year Deployed: 2004)
Analytical Equipment
Carbonyls
2007-2018
Waters Alliance 2690 HPLC/ model 996 PDA (Year Deployed: 1999)
Chromium VI
2007-2014
Dionex modular Ion Chromatography (Year Deployed: 2007)
2007-2007
HP/Agilent 5890/5971 GC/MS (Year Deployed: 1990)
PAHs
2008-2013
HP/Agilent 5890/5971 GC/MS (Year Deployed: 2008)
2014-2018
HP/Agilent 7890B/5975C GC/MS (Year Deployed: 2014)
PM10 Metals
2007-2010
LECO Renaissance TOF-ICP-MS (Year Deployed: 1998)
2011-2018
PE ELAN ICP-MS (Year Deployed: 2010)
VOCs
2007-2018
Agilent 6890/5973 GC/MS (Year Deployed: 2006)
Preconcentrator Equipment
VOCs
2007-2016
Entech 7100A (Year Deployed: 2006)
2017-2018
Entech7200 (Year Deployed: 2017)
Standards Preparation Equipment
VOCs
2007-2017
Entech 4600 (Dynamic Dilution) (Year Deployed: 2004)
2018
Entech 4700 (Pressure Dilution) (Year Deployed: 2018)
Canister Cleaning Equipment
VOCs
2007-2018
Entech 3100A (Hot) (Year Deployed: 2007)
PM10 Extraction Equipment
PM10 Metals
2007-2009
CEMMars5 (Microwave) (Year Deployed: 2002)
2010-2018
CEMMars5 (Microwave) (Year Deployed: 2009)
Chromium VI Extraction Equipment
Chromium VI
2007-2014
Zenith Model G4-80/40 Sonicator (Year Deployed: <2000)
PAHs Extraction Equipment
PAHs
2007-2018 |Dionex -300 (ASE) (Year Deployed: 2004)
Page 25 of 25
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