-CLOSURE MONITORING REPORT

2020 ANNUAL CLOSED PONDS POST-CLOSURE

MONITORING REPORT

FORMER MONTROSE FACILITY HENDERSON, NEVADA

CONVERSE PROJECT NO. 89-43133-25

Presented To:

MONTROSE CHEMICAL CORPORATION OF CALIFORNIA 600 Ericksen Avenue NE, Suite 360

Bainbridge Island, WA 98110

Presented By:

CONVERSE CONSULTANTS 6610 W. Arby Ave, Suite 104

Las Vegas, NV 89118 702-269-8336

September 3, 2020

Montrose 2020 Post Closure Report

Contents Page

Limitations ................................................................................................................... i Certified Environmental Manager (CEM) Statement .................................................... i 1.0 Sampling and Analysis Procedures ............................................................... 1

2.0 Water Level and Water Quality Data Evaluation ............................................ 2

2.1 Groundwater Elevation Data .............................................................. 2 2.2 Evaluation of Concentration Data ....................................................... 2 2.2.1 Indicator Compounds .............................................................. 3 2.2.2 Non-Indicator Compounds ...................................................... 6 2.2.3 Miscellaneous Organic Compounds ........................................ 9

3.0 Conclusions ................................................................................................... 10 4.0 Path Forward ................................................................................................ 11

List of Tables in Report

Table 1 - Groundwater Elevation Comparison

Table 2 – Indicator Compounds Results 2020

Table 2A - Carbon Tetrachloride Analytical Summary

Table 2B – Methylene Chloride Analytical Summary

Table 2C – DDT Analytical Summary

Table 3 – Quantified Non-Indicator Compounds

Table 3A – Benzene Analytical Summary

Table 3B – Chloroform Analytical Summary

Table 3C – Chlorobenzene Analytical Summary

Table 3D – 1,2 Dichlorobenzene Analytical Summary

Table 3E – 1,4 Dichlorobenzene Analytical Summary

Table 4 – Quantified Miscellaneous Compounds

List of Figures

Figure 1 – Site Map/Well locations

List of Appendices

Appendix A – Groundwater Trend Data

Table 1 - Two Year Analytical Results

MW-1, MW-2, MW-3, & MW-4 Time Series Graphs

Mann Kendall Trend Test for Plume Stability

Appendix B – Groundwater Elevation Data

Montrose Facility Groundwater Elevation Data Table

Graph - Montrose Facility Groundwater Elevations Over Time

Appendix C – June 2020 Laboratory Report

Appendix D – Low Flow Purge Sampling Forms

KJP:ls

Dist: 1/James Dotchin - NDEP - Electronic Transmittal 1/Mr. Joe Kelly - Montrose - CD 1/Mr. Ed Modiano – Montrose - CD

1/Latham & Watkins, Attn: Kelly Richardson - CD Electronic and Hard Copy Distribution per NDEP 7/1/14 Deliverable Distribution Guidance Distribution to BMI Interested Parties via posting to Project Portal website and E-mail notification of availability

89-43-133-25 June 2020 post closure report.doc Converse Consultants

Montrose 2020 Post Closure Report

This report has been prepared in accordance with the Amended Closure/Post-

Closure Plan approved by the Nevada Division of Environmental Protection

(NDEP). This report covers the 2020 annual monitoring and sampling of four

groundwater monitoring wells located near the closed ponds of the former

Montrose Chemical Corporation of California (Montrose) facility in Henderson,

Nevada. Well MW-1 is located upgradient of the former ponds, while wells MW-2,

MW-3, and MW-4 are arrayed in an east-west transect across the downgradient

edge of the ponds. A site map depicting the locations of these wells is provided

as Figure 1. Groundwater quality and water level trend data are presented within

this report and included in Appendices A and B.

1.0 Sampling and Analysis Procedures

Field sampling was performed in accordance with the current version of the

Sampling and Analysis Plan dated April 16, 2014. Water levels were measured

using a Keck and Solinst water level meter. Micro-purge sampling procedures

were used during this event to facilitate the use of consistent groundwater

sampling techniques across the sampling programs being performed at the

Montrose site. Water samples were logged and tracked using Chain-of-Custody

forms and shipped to Test America Laboratories of Irvine, California for analysis

(Appendix C). The groundwater samples were analyzed by TestAmerica

Analytical Testing Corporation, a Nevada certified laboratory. The samples were

analyzed for the following parameters:

• Volatile organic compounds (VOCs) using EPA Method 8260B

• Organochlorine pesticides using EPA Method 8081A

• 2,2/4,4-dichlorobenzil using EPA Method 8270C

Sampling data for each well was recorded on Low-Flow Purge/Sampling Forms,

as presented in Appendix D.

Montrose 2020 Post Closure Report 2


2.0 Water Level and Water Quality Data Evaluation

2.1 Groundwater Elevation Data

When compared to the April 2019 monitoring event, the static water level

elevations during June 2020 increased/decreased in the closed pond area as

follows:

Table 1 - Groundwater Elevation Comparison

2019 to 2020 Monitoring Events

Well I.D. MW-1 MW-2 MW-3 MW-4

April-19 1797.99 1781.97 1781.38 1782.01

June-20 1798.84 1782.13 1781.41 1782.17

Difference +0.85 ft +0.16 ft +0.03 ft +0.16 ft

Since the inception of monitoring in 1989, static groundwater elevations have

increased as follows:

1989 to 2020 Monitoring Events

Well I.D. MW-1 MW-2 MW-3 MW-4

May-89 1775.66 1771.37 1770.99 1771.77

June-20 1797.99 1781.97 1781.38 1782.01

Difference +23.18 ft +10.76 ft +10.42 ft +10.40 ft

A table and graph displaying the overall rise in groundwater elevations for these

wells over time are provided in Appendix B. As a note, water levels in monitor

wells MW-2 through MW-4 have leveled off.

2.2 Evaluation of Concentration Data

In accordance with the March 20, 1989 NDEP letter to Montrose, seven

compounds, as listed below, were identified as “indicator compounds” for

evaluation.

• Carbon Tetrachloride • Methylene Chloride

• DDT • Toluene

• Dichlorobenzil • Total Xylenes

• Ethylbenzene



The analytical suite used to analyze these indicator compounds also identifies

other compounds that, for the purposes of this report, are referred to as “non-

indicator” compounds. The following non-indicator compounds have had

historical detectable concentrations during monitoring:

• Benzene • Chlorobenzene

• Chloroform • 1,2 – Dichlorobenzene

• 1,4 – Dichlorobenzene

An evaluation of concentration data for indicator and commonly observed non-

indicator compounds in each well is as follows:

• From the preceding sampling period (April 2019)

• Historical concentration range observed over all monitoring periods since

1990

• Presence of trends occurring over the last five years (April 2016 to June

2020 monitoring events)

2.2.1 Indicator Compounds

For the June 2020 monitoring event, carbon tetrachloride, DDT and methylene

chloride were detected above their respective method detection limits (MDL).

Dichlorobenzil, ethylbenzene, toluene, and total xylenes (o-Xylene + m,p-Xylene)

were below their respective MDLs.

Table 2 – Indicator Compound Results 2020

Constituent MCL MW-1 MW-2 MW-3 MW-4

Carbon Tetrachloride 5 <0.25 <100 <100 0.72J

DDT 0.20 (BCL) .0197 .0075 <0.024 <0.097

Dichlorobenzil 11 (BCL) <4.4 <4.4 <87 <4.4

Ethylbenzene 700 <0.25 <100 <25 <0.63

Methylene Chloride 5 (BCL) <0.88 <350 94J <2.2

Toluene 1,000 <0.25 <100 <25 <0.63

Total Xylenes 10,000 <0.75 <300 <75 <1.93



Note: All concentrations are listed in micrograms per liter (µg/L). Numbers with (J) symbol indicates a

result that is less than the reporting limit (RL), but greater than or equal to the MDL and the concentration

is an approximate value. Numbers with a less than (<) symbol indicate that the number is less than the

MDL. Methylene Chloride does not have an EPA MCL. The NDEP Basic Comparison Level (BCL) was

used.

Table 2A - Carbon Tetrachloride Analytical Summary

Well 2020 2019 Historical

High Date Historical Low Date 5 Year Range

MW-1 <0.25 <0.25 <5 Multiple <0.25 Multiple <0.25-<0.25

MW-2 <100 97J 1,500 October 2006

<100 April 2018 <100-140

MW-3 <100 <25 76 October

2006 <13 Multiple <13-<100

MW-4 0.72J 0.93 80 October 2006

0.72 April 2018 0.72-1.9

Carbon Tetrachloride Summary

The carbon tetrachloride concentration in MW-1 remained below the MCL of 5

µg/L. The carbon tetrachloride concentration was non-detectable (<100 µg/L) in

monitoring wells MW-2 and MW-3. Although it was reported as non-detectable,

there is a possibility that the concentrations of carbon tetrachloride in MW-2 and

MW-3 are above the MCL of 5 µg/L. The carbon tetrachloride concentration in

well MW-4 (0.72 µg/L) was denoted with a J qualifier, which indicates a result

that is less than the RL but greater than or equal to the MDL and the

concentration is an approximate value. The 0.72 µg/L concentration is

approximate and may be above the EPA MCL of 5.0 µg/L for carbon

tetrachloride. Carbon tetrachloride concentrations in all wells are at the low end

of historical and 5-year ranges.

Table 2B - Methylene Chloride Analytical Summary



MW-1 <0.88 <1.1 <10 Multiple <0.95 Multiple <0.88-<1.1

MW-2 <350 <110 690 April 2013 4.3 April 1997 <110-<440

MW-3 94J 120J 300 January

1992 <5.0 Multiple 94-160

MW-4 <2.2 <2.2 300 January 1992

<2.2 Multiple <2.2-<2.8



Methylene Chloride Summary

The methylene chloride concentrations in MW-1 and MW-3 were non-detectable

(<1.1 µg/L & <2.2 µg/L) and below the NDEP BCL of 5.0 µg/L. Methylene

chloride was non-detectable (<350 µg/L) in monitoring well MW-2. Although it

was reported as non-detectable, there is a possibility that the concentration of

methylene chloride in well MW-2 is above the NDEP BCL of 5.0 µg/L. The

concentration of methylene chloride in monitoring well MW-3 in the 2020

sampling event was denoted with a J qualifier, which indicates a result that is

less than the RL but greater than or equal to the MDL and the concentration is an

approximate value. The 94 µg/L concentration is approximate. Methylene

chloride concentrations in all wells are at the low/mid end of their historical and 5-

year ranges.

Table 2C - DDT Analytical Summary



MW-1 0.0197 <0.0038 0.30 January

1992 <0.0038 April 2019

<0.0038-0.0197

MW-2 0.0075 <0.0039 0.15 October

2001 <0.0039 April 2019 <0.0039-0.012

MW-3 <0.024 <0.039 0.14 April 2005 <.019 Multiple <0.11-<0.021

MW-4 <0.0097 <0.0041 0.09 January

1992 <0.004 April 2016 <0.004-<0.11

DDT Summary

The concentration of DDT in monitoring well MW-1 (0.0197 µg/L) in the 2020

sampling event was denoted with a J qualifier, which indicates a result that is

less than the RL but greater than or equal to the MDL and the concentration is an

approximate value. The 0.0197 µg/L concentration is approximate and may be

above the EPA MCL of 0.20 µg/L for DDT. The concentration of DDT in

monitoring well MW-2 (0.0075 µg/L) in the 2020 sampling event was denoted

with a J and p qualifier. The p qualifier indicates that the relative percent

difference between the primary and confirmation column/detector is greater than

40%; therefore, the lower value has been reported. The 0.0075 µg/L

concentration is approximate and may be above the EPA MCL of 0.20 µg/L for

DDT. The DDT concentration in MW-3 and MW-4 was non-detectable (<0.024



µg/L & <0.0097 µg/L) and below the NDEP BCL of 0.20 µg/L. DDT

concentrations in all wells are at the low/mid end of their historical and 5-year

ranges.

Remaining Indicators

The other indicator compounds Dichlorobenzil, ethylbenzene, toluene, and total

xylenes (o-Xylene + m,p-Xylene) were reported to be below their respective

MDLs.

2.2.2 Non-Indicator Compounds

Data Presentation Conventions

The following presentation of the concentrations and trends for non-indicator

compounds focuses on those compounds having MCLs and for which historic

long-term data is available.

Data Evaluation and Trends

The concentrations of benzene, chloroform, chlorobenzene, 1,2-dichlorobenzene

and 1,4-dichlorobenzene identified during this monitoring event are summarized

along with their respective MCLs in Table 3 below. In Tables 3A-E, the

compound concentrations are shown relative to historic observations in each

well. Trends are based on Mann Kendall analysis, which summarizes the findings

of each compound and identifies trends in each well over the preceding five-year

time period. The full Mann Kendall trend analysis can be found in Appendix A

and the full analytical report is provided in Appendix B.

Table 3 - Quantified Non-Indicator Compounds June 2020 Monitoring Event


Benzene 5 <0.25 1,400 390 <0.63

Chloroform 80 1.5J 74,000 18,000 530

Chlorobenzene 100 <0.25 1,500 11,000 <0.63

1,2-Dichlorobenzene 600 <0.25 <100 17,000 <0.63

1,4-Dichlorobenzene 75 <0.25 <100 14,000 <0.63




Note: All concentrations are listed in micrograms per liter (µg/L). Bold text are concentrations above their

maximum contaminant level. Numbers with (J) symbol indicates a result that is less than the RL, but

greater than or equal to the MDL and the concentration is an approximate value. Numbers with a less than

(<) symbol indicates that the number is less than the MDL. The MCL for Total Trihalomethanes has been

utilized for chloroform.

Table 3A - Benzene Analytical Summary

Benzene Summary

The benzene concentrations in MW-1 and MW-4 remained below the MCL of 5

µg/L. Benzene concentrations in MW-2 and MW-3 were above the MCL, but are

at the low end of these wells’ historic and 5-year concentration range for

benzene.

Table 3B- Chloroform Analytical Summary


High Date

Historical Low

Date 5 Year Range Mann

Kendall Trend

MW-1 1.5 3.3 150 October

1995 0.69 April 2007 1.5-3.3 Stable

MW-2 74,000 94,000 130,000 April 2016 2,600 July 1991 74,000-130,000 Shrinking

MW-3 18,000 25,000 43,200 September

1990 7,500

December 2002

18,000-28,000 Stable

MW-4 530 520 97,000 October

1998 520 April 2019 520-1,200 Shrinking


High Date

Historical Low

Date 5 Year Range Mann Kendall

Trend

MW-1 <0.25 <0.25 10 April 2004 <0.25 Multiple <0.25-<0.25 Stable

MW-2 1,400 1,300 24,000 September 1990

<100 April 1994 1,300-1,600 Stable

MW-3 390 400 15,000 September

1990 390 Multiple 390-620 Stable

MW-4 <0.63 <0.50 15,000 March 1990 <0.50 Multiple <0.50-<0.63 Stable



Chloroform Summary

The chloroform concentration in MW-1 remained below the MCL of 80 µg/L.

Chloroform concentrations in wells MW-2, MW-3, and MW-4 remained above the

MCL of 80 µg/L. The chloroform concentration in well MW-1 are at the low end of

its historical range. Chloroform concentrations in MW-2 and MW-3 are in the

middle of the historical range and low end of the 5-year range. The chloroform

concentration in well MW-4 is at the low end of these wells’ historic and 5-year

concentration range.

Table 3C- Chlorobenzene Analytical Summary


High Date

Historical Low


Kendall Trend

MW-1 <0.25 <0.25 180 April 2004 <0.25 Multiple <0.25-0.55 Stable

MW-2 1,500 1,600 78,000 April 1993 110 October 1999

1,500-2,400 Stable

MW-3 11,000 12,000 38,000 October

2003 11,000 June 2020 11,000-16,000 Stable

MW-4 <0.63 2.2 43,000 March 1990

<0.63 June 2020 <0.63-3.3 Shrinking

Chlorobenzene Summary

Chlorobenzene concentrations in MW-1 and MW-4 remain below the MCL, while

concentrations in MW-2 and MW-3 exceeded the MCL of 100 µg/L.

Chlorobenzene concentrations in all wells are near the low end of their historical

ranges. The chlorobenzene concentration in MW-3 and MW-4 are at their lowest

concentration since the inception of sampling and the low end of their 5-year

ranges.

Table 3D- 1,2 Dichlorobenzene Analytical Summary


High Date

Historical Low


Trend


MW-2 <100 46 520 April 1992 13 April 2003 46-72 Stable

MW-3 17,000 18,000 43,000 October 1996

12,000 June 1990 17,000-21,000 Stable




High Date

Historical Low


Trend

MW-4 <0.63 4.4 8,900 April 1999 <0.63 June 2020 <0.63-4.9 Stable

1,2-Dichlorobenzene Summary

1,2-Dichlorobenzene concentrations in MW-1 and MW-4 remain below the MCL,

while the concentration in MW-3 exceeded the MCL of 600 µg/L. Concentrations

of 1,2-Dichlorobenzene are at the low end of their historically observed ranges

for all four wells.

Table 3E- 1,4 Dichlorobenzene Analytical Summary


High Date

Historical Low


Kendall Trend


MW-2 <100 69 650 April 1992 20 April 2003 69-140 Stable

MW-3 14,000 16,000 48,000 October 1996

14,000 Multiple 14,000-19,000 Stable

MW-4 <0.63 4.0 21,000 October 1998

<0.63 June 2020 <0.63-4.3 Stable

1,4-Dichlorobenzene Summary

Concentrations of 1,4-Dichlorobenzene in wells MW-1, MW-2, and MW-4 are

below the MCL of 75 µg/L, while the concentration in MW-3 exceeded the MCL.

1,4-Dichlorobenzene was non-detectable (<100 µg/L) in monitoring well MW-2.

Although it was reported as non-detectable, there is a possibility that the

concentration of 1,4-Dichlorobenzene in well MW-2 is above the MCL.

Concentrations of 1,4-Dichlorobenzene are at the low end of their historically and

in their 5-year observed ranges for all four wells.

2.2.3 Miscellaneous Organic Compounds

In addition to the indicator and non-indicator compounds discussed above, two

additional organic compounds and five pesticides have had measureable

concentrations during monitoring. These compounds are listed by well and

concentration in Table 4 below and the following is a summary of the detections

relative to MCLs or BCLs.



Table 4 - Quantified Miscellaneous Compounds

June 2020 Monitoring Event

Constituent MCL BCL MW-1 MW-2 MW-3 MW-4

1,3-Dichlorobenzene NA 80.7 <0.25 <100 710 <0.63

1,2,4-Trichlorobenzene 70 70 <0.40 <160 59J <1.0

4,4-DDE NA 0.193 <0.0025 0.0083J <0.094 <0.0024

4,4-DDD NA .063 <0.0025 <0.0025 0.019 <0.0024

beta-BHC NA 2.19 <0.0040 <0.0098 0.18p <0.0039

alpha-BHC NA 11 <0.0025 0.023 0.22 0.0028J

gamma-BHC (Lindane) 0.20 0.20 <0.0030 0.0065J 0.093p <0.0029

Note: All concentrations are listed in micrograms per liter (µg/L). Bold text are concentrations above their

maximum contaminant level. Numbers with a (J) symbol indicate a result that is less than the RL, but greater

than or equal to the MDL and the concentration is an approximate value. Numbers with a less than (<) symbol

indicate that the number is less than the MDL. Numbers with a (p) symbol indicate a relative percentage

difference between the primary and confirmation column/detector is >40% and the lower value has been

reported.

• Concentrations of 1,3-Dichlorobenzene were non-detectable in monitoring

wells MW-1, MW-2, and MW-4, but were detectable in MW-3 at a

concentration of 710 µg/L, which is above the BCL of 80.7 µg/L. 1,3-

Dichlorobenzene does not have a MCL.

• No other miscellaneous compounds had a concentration over their respective

MCLs or BCLs. There were numbers that were designated with J and p

symbols in the laboratory analysis, which represent that the concentrations

are approximated and the numbers may be over their respective MCLs or

BCLs.

3.0 Conclusions

Compared to the previous monitoring event, which was performed during April

2019, concentrations of the indicator and non-indicator compounds sampled

(VOCs, pesticides, and dichlorobenzil) in monitoring wells MW-1 through MW-4

generally decreased or remained stable as compared to their respective historic

ranges.



4.0 Path Forward

This annual closed pond post-closure monitoring event was conducted

concurrently with the annual site-wide groundwater monitoring event that covers

the entire Olin-Stauffer-Syngenta-Montrose (OSSM) site.

Unless otherwise planned through discussions with the NDEP, the next

monitoring event will be conducted in April 2021 and the analytical suite for the

monitoring event will utilize the same, standard post-closure monitoring suite of

VOCs, SVOCs (4,4-dichlorobenzil only), and organochlorine pesticides.

The data generated by each monitoring event will continue to be presented in a

format similar to that used for this report and will also be evaluated as part of the

OSSM annual site-wide comprehensive groundwater evaluation report to provide

a site-wide context to the data.

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Appendix A

Groundwater Trend Data

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Historical Carbon Tertachloride Concentrations - Montrose Monitoring Well MW-1

Carbon Tetrachloride Carbon tetrachloride MCL

Note: Non-detectable concentrations are shown as half of themethod detectable limit.

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Historical DDT Concentrations - Montrose Monitoring Well MW-1

DDT DDT BCL


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Historical 4,4 Dichlorobenzil Concentrations - Montrose Monitoring Well MW-1

4,4-Dichlorobenzil 4,4-Dichlorobenzil BCL


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Historical Ethylbenzene Concentrations - Montrose Monitoring Well MW-1

Ethylbenzene Ethylbenzene MCL


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1000

5/1/

89

5/1/

90

5/1/

91

5/1/

92

5/1/

93

5/1/

94

5/1/

95

5/1/

96

5/1/

97

5/1/

98

5/1/

99

5/1/

00

5/1/

01

5/1/

02

5/1/

03

5/1/

04

5/1/

05

5/1/

06

5/1/

07

5/1/

08

5/1/

09

5/1/

10

5/1/

11

5/1/

12

5/1/

13

5/1/

14

5/1/

15

5/1/

16

5/1/

17

5/1/

18

5/1/

19

5/1/

20

Con

cent

ratio

n in

µg/

L

Date of Sampling

Historical Methylene Chloride - Montrose Monitoring Well MW-1

Methylene Chloride Methylene Chloride BCL


0.1

1

10

100

1000

10000

5/1/

89

5/1/

90

5/1/

91

5/1/

92

5/1/

93

5/1/

94

5/1/

95

5/1/

96

5/1/

97

5/1/

98

5/1/

99

5/1/

00

5/1/

01

5/1/

02

5/1/

03

5/1/

04

5/1/

05

5/1/

06

5/1/

07

5/1/

08

5/1/

09

5/1/

10

5/1/

11

5/1/

12

5/1/

13

5/1/

14

5/1/

15

5/1/

16

5/1/

17

5/1/

18

5/1/

19

5/1/

20

Con

cent

ratio

n in

µg/

L

Date of Sampling

Historical Toluene Concentrations - Montrose Monitoring Well MW-1

Toluene Toluene MCL/BCL


0.1

1

10

100

1000

10000

100000

5/1/

89

5/1/

90

5/1/

91

5/1/

92

5/1/

93

5/1/

94

5/1/

95

5/1/

96

5/1/

97

5/1/

98

5/1/

99

5/1/

00

5/1/

01

5/1/

02

5/1/

03

5/1/

04

5/1/

05

5/1/

06

5/1/

07

5/1/

08

5/1/

09

5/1/

10

5/1/

11

5/1/

12

5/1/

13

5/1/

14

5/1/

15

5/1/

16

5/1/

17

5/1/

18

5/1/

19

5/1/

20

Con

cent

ratio

n in

µg/

L

Date of Sampling

Historical Total Xylenes Concentrations - Montrose Monitoring Well MW-1

Total Xylenes Total Xylenes MCL/BCL


0.1

1

10

100

1000

5/1/

89

5/1/

90

5/1/

91

5/1/

92

5/1/

93

5/1/

94

5/1/

95

5/1/

96

5/1/

97

5/1/

98

5/1/

99

5/1/

00

5/1/

01

5/1/

02

5/1/

03

5/1/

04

5/1/

05

5/1/

06

5/1/

07

5/1/

08

5/1/

09

5/1/

10

5/1/

11

5/1/

12

5/1/

13

5/1/

14

5/1/

15

5/1/

16

5/1/

17

5/1/

18

5/1/

19

5/1/

20

Con

cent

ratio

n in

µg/

L

Date of Sampling

Historical Benzene Concentrations - Montrose Monitoring Well MW-1

Benzene Benzene MCL Benzene BCLNote: Non-detectable concentrations are shown as half of themethod detectable limit.

0.1

1

10

100

1000

5/1/

89

5/1/

90

5/1/

91

5/1/

92

5/1/

93

5/1/

94

5/1/

95

5/1/

96

5/1/

97

5/1/

98

5/1/

99

5/1/

00

5/1/

01

5/1/

02

5/1/

03

5/1/

04

5/1/

05

5/1/

06

5/1/

07

5/1/

08

5/1/

09

5/1/

10

5/1/

11

5/1/

12

5/1/

13

5/1/

14

5/1/

15

5/1/

16

5/1/

17

5/1/

18

5/1/

19

5/1/

20

Con

cent

ratio

n in

µg/

L

Date of Sampling

Historical Chloroform Concentrations - Montrose Monitoring Well MW-1

Chloroform Chloroform MCLNote: Non-detectable concentrations are shown as half of themethod detectable limit.

0.1

1

10

100

1000

5/1/

89

5/1/

90

5/1/

91

5/1/

92

5/1/

93

5/1/

94

5/1/

95

5/1/

96

5/1/

97

5/1/

98

5/1/

99

5/1/

00

5/1/

01

5/1/

02

5/1/

03

5/1/

04

5/1/

05

5/1/

06

5/1/

07

5/1/

08

5/1/

09

5/1/

10

5/1/

11

5/1/

12

5/1/

13

5/1/

14

5/1/

15

5/1/

16

5/1/

17

5/1/

18

5/1/

19

5/1/

20

Con

cent

ratio

n in

µg/

L

Date of Sampling

Historical Chlorobenzene Concentrations - Montrose Monitoring Well MW-1

Chlorobenzene Chlorobenzene MCL/BCLNote: Non-detectable concentrations are shown as half of themethod detectable limit.

0.1

1

10

100

1000

5/1/

89

5/1/

90

5/1/

91

5/1/

92

5/1/

93

5/1/

94

5/1/

95

5/1/

96

5/1/

97

5/1/

98

5/1/

99

5/1/

00

5/1/

01

5/1/

02

5/1/

03

5/1/

04

5/1/

05

5/1/

06

5/1/

07

5/1/

08

5/1/

09

5/1/

10

5/1/

11

5/1/

12

5/1/

13

5/1/

14

5/1/

15

5/1/

16

5/1/

17

5/1/

18

5/1/

19

5/1/

20

Con

cent

ratio

n in

µg/

L

Date of Sampling

Historical 1,2 Dichlorobenzene Concentrations - Montrose Monitoring Well MW-1

1,2 - Dichlorobenzene 1,2 - Dichlorobenzene MCL/BCLNote: Non-detectable concentrations are shown as half of themethod detectable limit.

0.1

1

10

100

1000

5/1/

89

5/1/

90

5/1/

91

5/1/

92

5/1/

93

5/1/

94

5/1/

95

5/1/

96

5/1/

97

5/1/

98

5/1/

99

5/1/

00

5/1/

01

5/1/

02

5/1/

03

5/1/

04

5/1/

05

5/1/

06

5/1/

07

5/1/

08

5/1/

09

5/1/

10

5/1/

11

5/1/

12

5/1/

13

5/1/

14

5/1/

15

5/1/

16

5/1/

17

5/1/

18

5/1/

19

5/1/

20

Con

cent

ratio

n in

µg/

L

Date of Sampling



0.1

1

10

100

1000

10000

5/1/

89

5/1/

90

5/1/

91

5/1/

92

5/1/

93

5/1/

94

5/1/

95

5/1/

96

5/1/

97

5/1/

98

5/1/

99

5/1/

00

5/1/

01

5/1/

02

5/1/

03

5/1/

04

5/1/

05

5/1/

06

5/1/

07

5/1/

08

5/1/

09

5/1/

10

5/1/

11

5/1/

12

5/1/

13

5/1/

14

5/1/

15

5/1/

16

5/1/

17

5/1/

18

5/1/

19

5/1/

20

Con

cent

ratio

n in

µg/

L

Date of Sampling




0.001

0.01

0.1

1

10

100

1000

5/1/

89

5/1/

90

5/1/

91

5/1/

92

5/1/

93

5/1/

94

5/1/

95

5/1/

96

5/1/

97

5/1/

98

5/1/

99

5/1/

00

5/1/

01

5/1/

02

5/1/

03

5/1/

04

5/1/

05

5/1/

06

5/1/

07

5/1/

08

5/1/

09

5/1/

10

5/1/

11

5/1/

12

5/1/

13

5/1/

14

5/1/

15

5/1/

16

5/1/

17

5/1/

18

5/1/

19

5/1/

20

Con

cent

ratio

n in

µg/

L

Date of Sampling


DDT DDT BCL


0.1

1

10

100

1000

5/1/

89

5/1/

90

5/1/

91

5/1/

92

5/1/

93

5/1/

94

5/1/

95

5/1/

96

5/1/

97

5/1/

98

5/1/

99

5/1/

00

5/1/

01

5/1/

02

5/1/

03

5/1/

04

5/1/

05

5/1/

06

5/1/

07

5/1/

08

5/1/

09

5/1/

10

5/1/

11

5/1/

12

5/1/

13

5/1/

14

5/1/

15

5/1/

16

5/1/

17

5/1/

18

5/1/

19

5/1/

20

Con

cent

ratio

n in

µg/

L

Date of Sampling




0.01

0.1

1

10

100

1000

5/1/

89

5/1/

90

5/1/

91

5/1/

92

5/1/

93

5/1/

94

5/1/

95

5/1/

96

5/1/

97

5/1/

98

5/1/

99

5/1/

00

5/1/

01

5/1/

02

5/1/

03

5/1/

04

5/1/

05

5/1/

06

5/1/

07

5/1/

08

5/1/

09

5/1/

10

5/1/

11

5/1/

12

5/1/

13

5/1/

14

5/1/

15

5/1/

16

5/1/

17

5/1/

18

5/1/

19

5/1/

20

Con

cent

ratio

n in

µg/

L

Date of Sampling




1

10

100

1000

5/1/

89

5/1/

90

5/1/

91

5/1/

92

5/1/

93

5/1/

94

5/1/

95

5/1/

96

5/1/

97

5/1/

98

5/1/

99

5/1/

00

5/1/

01

5/1/

02

5/1/

03

5/1/

04

5/1/

05

5/1/

06

5/1/

07

5/1/

08

5/1/

09

5/1/

10

5/1/

11

5/1/

12

5/1/

13

5/1/

14

5/1/

15

5/1/

16

5/1/

17

5/1/

18

5/1/

19

5/1/

20

Con

cent

ratio

n in

µg/

L

Date of Sampling




0.1

1

10

100

1000

10000

5/1/

89

5/1/

90

5/1/

91

5/1/

92

5/1/

93

5/1/

94

5/1/

95

5/1/

96

5/1/

97

5/1/

98

5/1/

99

5/1/

00

5/1/

01

5/1/

02

5/1/

03

5/1/

04

5/1/

05

5/1/

06

5/1/

07

5/1/

08

5/1/

09

5/1/

10

5/1/

11

5/1/

12

5/1/

13

5/1/

14

5/1/

15

5/1/

16

5/1/

17

5/1/

18

5/1/

19

5/1/

20

Con

cent

ratio

n in

µg/

L

Date of Sampling




0.1

1

10

100

1000

10000

100000

5/1/

89

5/1/

90

5/1/

91

5/1/

92

5/1/

93

5/1/

94

5/1/

95

5/1/

96

5/1/

97

5/1/

98

5/1/

99

5/1/

00

5/1/

01

5/1/

02

5/1/

03

5/1/

04

5/1/

05

5/1/

06

5/1/

07

5/1/

08

5/1/

09

5/1/

10

5/1/

11

5/1/

12

5/1/

13

5/1/

14

5/1/

15

5/1/

16

5/1/

17

5/1/

18

5/1/

19

5/1/

20

Con

cent

ratio

n in

µg/

L

Date of Sampling




1

10

100

1000

10000

100000

5/1/

89

5/1/

90

5/1/

91

5/1/

92

5/1/

93

5/1/

94

5/1/

95

5/1/

96

5/1/

97

5/1/

98

5/1/

99

5/1/

00

5/1/

01

5/1/

02

5/1/

03

5/1/

04

5/1/

05

5/1/

06

5/1/

07

5/1/

08

5/1/

09

5/1/

10

5/1/

11

5/1/

12

5/1/

13

5/1/

14

5/1/

15

5/1/

16

5/1/

17

5/1/

18

5/1/

19

5/1/

20

Con

cent

ratio

n in

µg/

L

Date of Sampling



1

10

100

1000

10000

100000

1000000

5/1/

89

5/1/

90

5/1/

91

5/1/

92

5/1/

93

5/1/

94

5/1/

95

5/1/

96

5/1/

97

5/1/

98

5/1/

99

5/1/

00

5/1/

01

5/1/

02

5/1/

03

5/1/

04

5/1/

05

5/1/

06

5/1/

07

5/1/

08

5/1/

09

5/1/

10

5/1/

11

5/1/

12

5/1/

13

5/1/

14

5/1/

15

5/1/

16

5/1/

17

5/1/

18

5/1/

19

5/1/

20

Con

cent

ratio

n in

µg/

L

Date of Sampling



1

10

100

1000

10000

100000

5/1/

89

5/1/

90

5/1/

91

5/1/

92

5/1/

93

5/1/

94

5/1/

95

5/1/

96

5/1/

97

5/1/

98

5/1/

99

5/1/

00

5/1/

01

5/1/

02

5/1/

03

5/1/

04

5/1/

05

5/1/

06

5/1/

07

5/1/

08

5/1/

09

5/1/

10

5/1/

11

5/1/

12

5/1/

13

5/1/

14

5/1/

15

5/1/

16

5/1/

17

5/1/

18

5/1/

19

5/1/

20

Con

cent

ratio

n in

µg/

L

Date of Sampling



1

10

100

1000

5/1/

89

5/1/

90

5/1/

91

5/1/

92

5/1/

93

5/1/

94

5/1/

95

5/1/

96

5/1/

97

5/1/

98

5/1/

99

5/1/

00

5/1/

01

5/1/

02

5/1/

03

5/1/

04

5/1/

05

5/1/

06

5/1/

07

5/1/

08

5/1/

09

5/1/

10

5/1/

11

5/1/

12

5/1/

13

5/1/

14

5/1/

15

5/1/

16

5/1/

17

5/1/

18

5/1/

19

5/1/

20

Con

cent

ratio

n in

µg/

L

Date of Sampling



1

10

100

1000

5/1/

89

5/1/

90

5/1/

91

5/1/

92

5/1/

93

5/1/

94

5/1/

95

5/1/

96

5/1/

97

5/1/

98

5/1/

99

5/1/

00

5/1/

01

5/1/

02

5/1/

03

5/1/

04

5/1/

05

5/1/

06

5/1/

07

5/1/

08

5/1/

09

5/1/

10

5/1/

11

5/1/

12

5/1/

13

5/1/

14

5/1/

15

5/1/

16

5/1/

17

5/1/

18

5/1/

19

5/1/

20

Con

cent

ratio

n in

µg/

L

Date of Sampling



0.1

1

10

100

1000

10000

5/1/

89

5/1/

90

5/1/

91

5/1/

92

5/1/

93

5/1/

94

5/1/

95

5/1/

96

5/1/

97

5/1/

98

5/1/

99

5/1/

00

5/1/

01

5/1/

02

5/1/

03

5/1/

04

5/1/

05

5/1/

06

5/1/

07

5/1/

08

5/1/

09

5/1/

10

5/1/

11

5/1/

12

5/1/

13

5/1/

14

5/1/

15

5/1/

16

5/1/

17

5/1/

18

5/1/

19

5/1/

20

Con

cent

ratio

n in

µg/

L

Date of Sampling




0.001

0.01

0.1

1

10

100

1000

5/1/

89

5/1/

90

5/1/

91

5/1/

92

5/1/

93

5/1/

94

5/1/

95

5/1/

96

5/1/

97

5/1/

98

5/1/

99

5/1/

00

5/1/

01

5/1/

02

5/1/

03

5/1/

04

5/1/

05

5/1/

06

5/1/

07

5/1/

08

5/1/

09

5/1/

10

5/1/

11

5/1/

12

5/1/

13

5/1/

14

5/1/

15

5/1/

16

5/1/

17

5/1/

18

5/1/

19

5/1/

20

Con

cent

ratio

n in

µg/

L

Date of Sampling


DDT DDT BCL


0.1

1

10

100

1000

5/1/

89

5/1/

90

5/1/

91

5/1/

92

5/1/

93

5/1/

94

5/1/

95

5/1/

96

5/1/

97

5/1/

98

5/1/

99

5/1/

00

5/1/

01

5/1/

02

5/1/

03

5/1/

04

5/1/

05

5/1/

06

5/1/

07

5/1/

08

5/1/

09

5/1/

10

5/1/

11

5/1/

12

5/1/

13

5/1/

14

5/1/

15

5/1/

16

5/1/

17

5/1/

18

5/1/

19

5/1/

20

Con

cent

ratio

n in

µg/

L

Date of Sampling




0.1

1

10

100

1000

5/1/

89

5/1/

90

5/1/

91

5/1/

92

5/1/

93

5/1/

94

5/1/

95

5/1/

96

5/1/

97

5/1/

98

5/1/

99

5/1/

00

5/1/

01

5/1/

02

5/1/

03

5/1/

04

5/1/

05

5/1/

06

5/1/

07

5/1/

08

5/1/

09

5/1/

10

5/1/

11

5/1/

12

5/1/

13

5/1/

14

5/1/

15

5/1/

16

5/1/

17

5/1/

18

5/1/

19

5/1/

20

Con

cent

ratio

n in

µg/

L

Date of Sampling




1

10

100

1000

5/1/

89

5/1/

90

5/1/

91

5/1/

92

5/1/

93

5/1/

94

5/1/

95

5/1/

96

5/1/

97

5/1/

98

5/1/

99

5/1/

00

5/1/

01

5/1/

02

5/1/

03

5/1/

04

5/1/

05

5/1/

06

5/1/

07

5/1/

08

5/1/

09

5/1/

10

5/1/

11

5/1/

12

5/1/

13

5/1/

14

5/1/

15

5/1/

16

5/1/

17

5/1/

18

5/1/

19

5/1/

20

Con

cent

ratio

n in

µg/

L

Date of Sampling




0.1

1

10

100

1000

10000

5/1/

89

5/1/

90

5/1/

91

5/1/

92

5/1/

93

5/1/

94

5/1/

95

5/1/

96

5/1/

97

5/1/

98

5/1/

99

5/1/

00

5/1/

01

5/1/

02

5/1/

03

5/1/

04

5/1/

05

5/1/

06

5/1/

07

5/1/

08

5/1/

09

5/1/

10

5/1/

11

5/1/

12

5/1/

13

5/1/

14

5/1/

15

5/1/

16

5/1/

17

5/1/

18

5/1/

19

5/1/

20

Con

cent

ratio

n in

µg/

L

Date of Sampling




0.1

1

10

100

1000

10000

100000

5/1/

89

5/1/

90

5/1/

91

5/1/

92

5/1/

93

5/1/

94

5/1/

95

5/1/

96

5/1/

97

5/1/

98

5/1/

99

5/1/

00

5/1/

01

5/1/

02

5/1/

03

5/1/

04

5/1/

05

5/1/

06

5/1/

07

5/1/

08

5/1/

09

5/1/

10

5/1/

11

5/1/

12

5/1/

13

5/1/

14

5/1/

15

5/1/

16

5/1/

17

5/1/

18

5/1/

19

5/1/

20

Con

cent

ratio

n in

µg/

L

Date of Sampling




1

10

100

1000

10000

100000

5/1/

89

5/1/

90

5/1/

91

5/1/

92

5/1/

93

5/1/

94

5/1/

95

5/1/

96

5/1/

97

5/1/

98

5/1/

99

5/1/

00

5/1/

01

5/1/

02

5/1/

03

5/1/

04

5/1/

05

5/1/

06

5/1/

07

5/1/

08

5/1/

09

5/1/

10

5/1/

11

5/1/

12

5/1/

13

5/1/

14

5/1/

15

5/1/

16

5/1/

17

5/1/

18

5/1/

19

5/1/

20

Con

cent

ratio

n in

µg/

L

Date of Sampling



1

10

100

1000

10000

100000

5/1/

89

5/1/

90

5/1/

91

5/1/

92

5/1/

93

5/1/

94

5/1/

95

5/1/

96

5/1/

97

5/1/

98

5/1/

99

5/1/

00

5/1/

01

5/1/

02

5/1/

03

5/1/

04

5/1/

05

5/1/

06

5/1/

07

5/1/

08

5/1/

09

5/1/

10

5/1/

11

5/1/

12

5/1/

13

5/1/

14

5/1/

15

5/1/

16

5/1/

17

5/1/

18

5/1/

19

5/1/

20

Con

cent

ratio

n in

µg/

L

Date of Sampling



1

10

100

1000

10000

100000

5/1/

89

5/1/

90

5/1/

91

5/1/

92

5/1/

93

5/1/

94

5/1/

95

5/1/

96

5/1/

97

5/1/

98

5/1/

99

5/1/

00

5/1/

01

5/1/

02

5/1/

03

5/1/

04

5/1/

05

5/1/

06

5/1/

07

5/1/

08

5/1/

09

5/1/

10

5/1/

11

5/1/

12

5/1/

13

5/1/

14

5/1/

15

5/1/

16

5/1/

17

5/1/

18

5/1/

19

5/1/

20

Con

cent

ratio

n in

µg/

L

Date of Sampling



1

10

100

1000

10000

100000

5/1/

89

5/1/

90

5/1/

91

5/1/

92

5/1/

93

5/1/

94

5/1/

95

5/1/

96

5/1/

97

5/1/

98

5/1/

99

5/1/

00

5/1/

01

5/1/

02

5/1/

03

5/1/

04

5/1/

05

5/1/

06

5/1/

07

5/1/

08

5/1/

09

5/1/

10

5/1/

11

5/1/

12

5/1/

13

5/1/

14

5/1/

15

5/1/

16

5/1/

17

5/1/

18

5/1/

19

5/1/

20

Con

cent

ratio

n in

µg/

L

Date of Sampling



1

10

100

1000

10000

100000

5/1/

89

5/1/

90

5/1/

91

5/1/

92

5/1/

93

5/1/

94

5/1/

95

5/1/

96

5/1/

97

5/1/

98

5/1/

99

5/1/

00

5/1/

01

5/1/

02

5/1/

03

5/1/

04

5/1/

05

5/1/

06

5/1/

07

5/1/

08

5/1/

09

5/1/

10

5/1/

11

5/1/

12

5/1/

13

5/1/

14

5/1/

15

5/1/

16

5/1/

17

5/1/

18

5/1/

19

5/1/

20

Con

cent

ratio

n in

µg/

L

Date of Sampling



0.1

1

10

100

1000

5/1/

89

5/1/

90

5/1/

91

5/1/

92

5/1/

93

5/1/

94

5/1/

95

5/1/

96

5/1/

97

5/1/

98

5/1/

99

5/1/

00

5/1/

01

5/1/

02

5/1/

03

5/1/

04

5/1/

05

5/1/

06

5/1/

07

5/1/

08

5/1/

09

5/1/

10

5/1/

11

5/1/

12

5/1/

13

5/1/

14

5/1/

15

5/1/

16

5/1/

17

5/1/

18

5/1/

19

5/1/

20

Con

cent

ratio

n in

µg/

L

Date of Sampling




0.01

0.1

1

10

100

1000

5/1/

89

5/1/

90

5/1/

91

5/1/

92

5/1/

93

5/1/

94

5/1/

95

5/1/

96

5/1/

97

5/1/

98

5/1/

99

5/1/

00

5/1/

01

5/1/

02

5/1/

03

5/1/

04

5/1/

05

5/1/

06

5/1/

07

5/1/

08

5/1/

09

5/1/

10

5/1/

11

5/1/

12

5/1/

13

5/1/

14

5/1/

15

5/1/

16

5/1/

17

5/1/

18

5/1/

19

5/1/

20

Con

cent

ratio

n in

µg/

L

Date of Sampling


DDT DDT BCL


0.1

1

10

100

1000

5/1/

89

5/1/

90

5/1/

91

5/1/

92

5/1/

93

5/1/

94

5/1/

95

5/1/

96

5/1/

97

5/1/

98

5/1/

99

5/1/

00

5/1/

01

5/1/

02

5/1/

03

5/1/

04

5/1/

05

5/1/

06

5/1/

07

5/1/

08

5/1/

09

5/1/

10

5/1/

11

5/1/

12

5/1/

13

5/1/

14

5/1/

15

5/1/

16

5/1/

17

5/1/

18

5/1/

19

5/1/

20

Con

cent

ratio

n in

µg/

L

Date of Sampling




0.1

1

10

100

1000

5/1/

89

5/1/

90

5/1/

91

5/1/

92

5/1/

93

5/1/

94

5/1/

95

5/1/

96

5/1/

97

5/1/

98

5/1/

99

5/1/

00

5/1/

01

5/1/

02

5/1/

03

5/1/

04

5/1/

05

5/1/

06

5/1/

07

5/1/

08

5/1/

09

5/1/

10

5/1/

11

5/1/

12

5/1/

13

5/1/

14

5/1/

15

5/1/

16

5/1/

17

5/1/

18

5/1/

19

5/1/

20

Con

cent

ratio

n in

µg/

L

Date of Sampling




1

10

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1000

5/1/

89

5/1/

90

5/1/

91

5/1/

92

5/1/

93

5/1/

94

5/1/

95

5/1/

96

5/1/

97

5/1/

98

5/1/

99

5/1/

00

5/1/

01

5/1/

02

5/1/

03

5/1/

04

5/1/

05

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5/1/

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5/1/

08

5/1/

09

5/1/

10

5/1/

11

5/1/

12

5/1/

13

5/1/

14

5/1/

15

5/1/

16

5/1/

17

5/1/

18

5/1/

19

5/1/

20

Con

cent

ratio

n in

µg/

L

Date of Sampling




0.1

1

10

100

1000

10000

5/1/

89

5/1/

90

5/1/

91

5/1/

92

5/1/

93

5/1/

94

5/1/

95

5/1/

96

5/1/

97

5/1/

98

5/1/

99

5/1/

00

5/1/

01

5/1/

02

5/1/

03

5/1/

04

5/1/

05

5/1/

06

5/1/

07

5/1/

08

5/1/

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5/1/

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12

5/1/

13

5/1/

14

5/1/

15

5/1/

16

5/1/

17

5/1/

18

5/1/

19

5/1/

20

Con

cent

ratio

n in

µg/

L

Date of Sampling




0.1

1

10

100

1000

10000

100000

5/1/

89

5/1/

90

5/1/

91

5/1/

92

5/1/

93

5/1/

94

5/1/

95

5/1/

96

5/1/

97

5/1/

98

5/1/

99

5/1/

00

5/1/

01

5/1/

02

5/1/

03

5/1/

04

5/1/

05

5/1/

06

5/1/

07

5/1/

08

5/1/

09

5/1/

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11

5/1/

12

5/1/

13

5/1/

14

5/1/

15

5/1/

16

5/1/

17

5/1/

18

5/1/

19

5/1/

20

Con

cent

ratio

n in

µg/

L

Date of Sampling




0.1

1

10

100

1000

10000

100000

5/1/

89

5/1/

90

5/1/

91

5/1/

92

5/1/

93

5/1/

94

5/1/

95

5/1/

96

5/1/

97

5/1/

98

5/1/

99

5/1/

00

5/1/

01

5/1/

02

5/1/

03

5/1/

04

5/1/

05

5/1/

06

5/1/

07

5/1/

08

5/1/

09

5/1/

10

5/1/

11

5/1/

12

5/1/

13

5/1/

14

5/1/

15

5/1/

16

5/1/

17

5/1/

18

5/1/

19

5/1/

20

Con

cent

ratio

n in

µg/

L

Date of Sampling



1

10

100

1000

10000

100000

5/1/

89

5/1/

90

5/1/

91

5/1/

92

5/1/

93

5/1/

94

5/1/

95

5/1/

96

5/1/

97

5/1/

98

5/1/

99

5/1/

00

5/1/

01

5/1/

02

5/1/

03

5/1/

04

5/1/

05

5/1/

06

5/1/

07

5/1/

08

5/1/

09

5/1/

10

5/1/

11

5/1/

12

5/1/

13

5/1/

14

5/1/

15

5/1/

16

5/1/

17

5/1/

18

5/1/

19

5/1/

20

Con

cent

ratio

n in

µg/

L

Date of Sampling



0.1

1

10

100

1000

10000

100000

5/1/

89

5/1/

90

5/1/

91

5/1/

92

5/1/

93

5/1/

94

5/1/

95

5/1/

96

5/1/

97

5/1/

98

5/1/

99

5/1/

00

5/1/

01

5/1/

02

5/1/

03

5/1/

04

5/1/

05

5/1/

06

5/1/

07

5/1/

08

5/1/

09

5/1/

10

5/1/

11

5/1/

12

5/1/

13

5/1/

14

5/1/

15

5/1/

16

5/1/

17

5/1/

18

5/1/

19

5/1/

20

Con

cent

ratio

n in

µg/

L

Date of Sampling



0.1

1

10

100

1000

10000

5/1/

89

5/1/

90

5/1/

91

5/1/

92

5/1/

93

5/1/

94

5/1/

95

5/1/

96

5/1/

97

5/1/

98

5/1/

99

5/1/

00

5/1/

01

5/1/

02

5/1/

03

5/1/

04

5/1/

05

5/1/

06

5/1/

07

5/1/

08

5/1/

09

5/1/

10

5/1/

11

5/1/

12

5/1/

13

5/1/

14

5/1/

15

5/1/

16

5/1/

17

5/1/

18

5/1/

19

5/1/

20

Con

cent

ratio

n in

µg/

L

Date of Sampling



0.1

1

10

100

1000

10000

100000

5/1/

89

5/1/

90

5/1/

91

5/1/

92

5/1/

93

5/1/

94

5/1/

95

5/1/

96

5/1/

97

5/1/

98

5/1/

99

5/1/

00

5/1/

01

5/1/

02

5/1/

03

5/1/

04

5/1/

05

5/1/

06

5/1/

07

5/1/

08

5/1/

09

5/1/

10

5/1/

11

5/1/

12

5/1/

13

5/1/

14

5/1/

15

5/1/

16

5/1/

17

5/1/

18

5/1/

19

5/1/

20

Con

cent

ratio

n in

µg/

L

Date of Sampling



Appendix B

Groundwater Elevation Data

Appendix C

April 2020 Laboratory Report

ANALYTICAL REPORTEurofins Calscience Irvine17461 Derian AveSuite 100Irvine, CA 92614-5817Tel: (949)261-1022

Laboratory Job ID: 440-267502-1Laboratory Sample Delivery Group: Henderson, NVClient Project/Site: Montrose

For:de maximis, inc.1322 Scott Street, Suite 104San Diego, California 92106

Attn: Nicole Bradley

Authorized for release by:6/25/2020 1:30:12 PM

Danielle Roberts, Senior Project Manager(949)[email protected]

The test results in this report meet all 2003 NELAC, 2009 TNI, and 2016 TNI requirements foraccredited parameters, exceptions are noted in this report. This report may not be reproducedexcept in full, and with written approval from the laboratory. For questions please contact theProject Manager at the e-mail address or telephone number listed on this page.

This report has been electronically signed and authorized by the signatory. Electronic signature isintended to be the legally binding equivalent of a traditionally handwritten signature.

Results relate only to the items tested and the sample(s) as received by the laboratory.

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mailto:[email protected]

Table of Contents

Client: de maximis, inc.Project/Site: Montrose

Laboratory Job ID: 440-267502-1SDG: Henderson, NV

Page 2 of 45Eurofins Calscience Irvine

6/25/2020

Cover Page . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

Table of Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

Sample Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

Case Narrative . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

Detection Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Client Sample Results . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Surrogate Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

Method Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

Lab Chronicle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

QC Sample Results . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

QC Association Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40

Definitions/Glossary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42

Certification Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43

Chain of Custody . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44

Receipt Checklists . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

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Sample SummaryJob ID: 440-267502-1Client: de maximis, inc.SDG: Henderson, NVProject/Site: Montrose

Lab Sample ID Client Sample ID ReceivedCollectedMatrix Asset ID

440-267502-1 MW-1-20200615 Water 06/15/20 11:48 06/16/20 09:30

440-267502-2 MW-2-20200615 Water 06/15/20 12:02 06/16/20 09:30

440-267502-3 MW-3-20200615 Water 06/15/20 10:25 06/16/20 09:30

440-267502-4 MW-4-20200615 Water 06/15/20 10:22 06/16/20 09:30

440-267502-5 TB-20200615 Water 06/15/20 07:45 06/16/20 09:30

440-267502-6 PL-510-20200615 Water 06/15/20 11:35 06/16/20 09:30

Eurofins Calscience Irvine

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Case NarrativeClient: de maximis, inc. Job ID: 440-267502-1Project/Site: Montrose SDG: Henderson, NV

Job ID: 440-267502-1

Laboratory: Eurofins Calscience Irvine

Narrative

Job Narrative

440-267502-1

Comments

No additional comments.

Receipt

The samples were received on 6/16/2020 9:30 AM; the samples arrived in good condition, properly preserved and, where required, on ice. The temperatures of the 3 coolers at receipt time were 0.9º C, 1.3º C and 1.6º C.

GC/MS VOA

Method 8260B: The continuing calibration verification (CCV) associated with batch 440-613704 recovered above the upper control limit for Vinyl chloride and Chloromethane. The samples associated with this CCV were non-detects for the affected analytes; therefore, the data

have been reported.

Method 8260B: The laboratory control sample (LCS) for analytical batch 440-613704 recovered outside control limit for the following analyte: Chloromethane. This analyte was biased high in the LCS and was not detected in the associated samples; therefore, the data have been reported.

Method 8260B: The continuing calibration verification (CCV) associated with batch 440-613896 recovered above the upper control limit for

Dichlorodifluoromethane. The samples associated with this CCV were non-detects for the affected analytes; therefore, the data have been reported.

Method 8260B: The laboratory control sample (LCS) for analytical batch 440-613896 recovered outside control limit for the following

analyte: Dichlorodifluoromethane. This analyte was biased high in the LCS and was not detected in the associated samples; therefore, the data have been reported.

No additional analytical or quality issues were noted, other than those described above or in the Definitions/Glossary page.

GC/MS Semi VOA Method 8270C: 2,2'-Dichlorobenzil The continuing calibration verification (CCV) associated with batch 440-613826 recovered above the upper control limit for 2,2'-Dichlorobenzil. The samples associated with this CCV were non-detects for the affected analytes; therefore, the data have been reported. The associated samples are impacted: MW-2-20200615 (440-267502-2), MW-3-20200615 (440-267502-3), MW-4-20200615 (440-267502-4) and (CCV 440-613826/3).


GC Semi VOA

Method 8081A: Insufficient sample volume was available to perform a matrix spike/matrix spike duplicate (MS/MSD) associated with

preparation batch 440-613067 and analytical batch 440-613331. The laboratory control sample (LCS) was performed in duplicate to

provide precision data for this batch: (LCS 440-613067/2-A)


Organic Prep

Methods 3510C, 8081: Insufficient sample volume was available to perform a matrix spike/matrix spike duplicate/sample duplicate (MS/MSD/DUP) associated with preparation batch 440-613067.

Method 3520C: Insufficient sample volume was available to perform a matrix spike/matrix spike duplicate (MS/MSD) associated with

8270C preparation batch 440-613491. LCS was performed in duplicate to provide precision of data.


VOA Prep

No analytical or quality issues were noted, other than those described in the Definitions/Glossary page.

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Detection SummaryJob ID: 440-267502-1Client: de maximis, inc.SDG: Henderson, NVProject/Site: Montrose

Client Sample ID: MW-1-20200615 Lab Sample ID: 440-267502-1

Chloroform

RL

2.0 ug/L

MDL

0.25

Analyte Result Qualifier Unit Dil Fac D Method Prep Type

Total/NA1J1.5 8260B

2,4'-DDT 0.10 ug/L0.0025 Total/NA10.010 J 8081A

4,4'-DDT 0.10 ug/L0.0025 Total/NA10.0097 J 8081A


Benzene

RL

800 ug/L

MDL

100


Total/NA4001400 8260B

Chlorobenzene 800 ug/L100 Total/NA4001500 8260B

Chloroform 800 ug/L100 Total/NA40074000 8260B

4,4'-DDE 0.098 ug/L0.0025 Total/NA10.0083 J 8081A

4,4'-DDT 0.098 ug/L0.0025 Total/NA10.0075 J p 8081A

alpha-BHC 0.0049 ug/L0.0025 Total/NA10.023 8081A

gamma-BHC (Lindane) 0.098 ug/L0.0029 Total/NA10.0065 J 8081A


1,2,4-Trichlorobenzene

RL

500 ug/L

MDL

40


Total/NA100J59 8260B

1,2-Dichlorobenzene 200 ug/L25 Total/NA10017000 8260B



Benzene 200 ug/L25 Total/NA100390 8260B

Chlorobenzene 200 ug/L25 Total/NA10011000 8260B

Chloroform 200 ug/L25 Total/NA10018000 8260B

Methylene Chloride 200 ug/L88 Total/NA10094 J 8260B

4,4'-DDD 0.094 ug/L0.0024 Total/NA10.019 J 8081A

alpha-BHC 0.0047 ug/L0.0024 Total/NA10.22 8081A

beta-BHC 0.0094 ug/L0.0038 Total/NA10.18 p 8081A

gamma-BHC (Lindane) 0.094 ug/L0.0028 Total/NA10.093 J p 8081A


Carbon tetrachloride

RL

2.5 ug/L

MDL

0.63


Total/NA2.5J0.72 8260B

Chloroform - DL 40 ug/L5.0 Total/NA20530 8260B

alpha-BHC 0.0049 ug/L0.0024 Total/NA10.0028 J 8081A

Client Sample ID: TB-20200615 Lab Sample ID: 440-267502-5

No Detections.

Client Sample ID: PL-510-20200615 Lab Sample ID: 440-267502-6

No Detections.


This Detection Summary does not include radiochemical test results.

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Client Sample ResultsJob ID: 440-267502-1Client: de maximis, inc.SDG: Henderson, NVProject/Site: Montrose

Lab Sample ID: 440-267502-1Client Sample ID: MW-1-20200615Matrix: WaterDate Collected: 06/15/20 11:48

Date Received: 06/16/20 09:30

Method: 8260B - Volatile Organic Compounds (GC/MS)RL MDL

1,1,1,2-Tetrachloroethane ND 5.0 0.25 ug/L 06/22/20 15:36 1

Analyte Dil FacAnalyzedPreparedUnit DResult Qualifier

2.0 0.25 ug/L 06/22/20 15:36 11,1,1-Trichloroethane ND

2.0 0.25 ug/L 06/22/20 15:36 11,1,2,2-Tetrachloroethane ND


2.0 0.25 ug/L 06/22/20 15:36 11,1-Dichloroethane ND

5.0 0.25 ug/L 06/22/20 15:36 11,1-Dichloroethene ND

2.0 0.25 ug/L 06/22/20 15:36 11,1-Dichloropropene ND

5.0 0.40 ug/L 06/22/20 15:36 11,2,3-Trichlorobenzene ND

10 0.40 ug/L 06/22/20 15:36 11,2,3-Trichloropropane ND


2.0 0.25 ug/L 06/22/20 15:36 11,2,4-Trimethylbenzene ND

5.0 0.50 ug/L 06/22/20 15:36 11,2-Dibromo-3-Chloropropane ND

2.0 0.25 ug/L 06/22/20 15:36 11,2-Dibromoethane (EDB) ND

2.0 0.25 ug/L 06/22/20 15:36 11,2-Dichlorobenzene ND


2.0 0.25 ug/L 06/22/20 15:36 11,2-Dichloropropane ND






5.0 0.25 ug/L 06/22/20 15:36 12-Chlorotoluene ND


2.0 0.25 ug/L 06/22/20 15:36 1Benzene ND

5.0 0.25 ug/L 06/22/20 15:36 1Bromobenzene ND

5.0 0.25 ug/L 06/22/20 15:36 1Bromochloromethane ND

2.0 0.25 ug/L 06/22/20 15:36 1Bromodichloromethane ND

5.0 0.40 ug/L 06/22/20 15:36 1Bromoform ND

5.0 0.25 ug/L 06/22/20 15:36 1Bromomethane ND

1.0 0.25 ug/L 06/22/20 15:36 1Carbon tetrachloride ND

2.0 0.25 ug/L 06/22/20 15:36 1Chlorobenzene ND

5.0 0.40 ug/L 06/22/20 15:36 1Chloroethane ND

2.0 0.25 ug/L 06/22/20 15:36 1Chloroform 1.5 J

5.0 0.25 ug/L 06/22/20 15:36 1Chloromethane ND *

2.0 0.25 ug/L 06/22/20 15:36 1cis-1,2-Dichloroethene ND

2.0 0.25 ug/L 06/22/20 15:36 1cis-1,3-Dichloropropene ND

2.0 0.25 ug/L 06/22/20 15:36 1Dibromochloromethane ND

2.0 0.25 ug/L 06/22/20 15:36 1Dibromomethane ND

5.0 0.40 ug/L 06/22/20 15:36 1Dichlorodifluoromethane ND

2.0 1.0 ug/L 06/22/20 15:36 1Dimethyl disulfide ND

2.0 0.25 ug/L 06/22/20 15:36 1Ethylbenzene ND

5.0 0.25 ug/L 06/22/20 15:36 1Hexachlorobutadiene ND

2.0 0.25 ug/L 06/22/20 15:36 1Isopropylbenzene ND

2.0 0.50 ug/L 06/22/20 15:36 1m,p-Xylene ND

2.0 0.88 ug/L 06/22/20 15:36 1Methylene Chloride ND

5.0 0.40 ug/L 06/22/20 15:36 1Naphthalene ND

5.0 0.40 ug/L 06/22/20 15:36 1n-Butylbenzene ND

2.0 0.25 ug/L 06/22/20 15:36 1N-Propylbenzene ND

2.0 0.25 ug/L 06/22/20 15:36 1o-Xylene ND


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Method: 8260B - Volatile Organic Compounds (GC/MS) (Continued)RL MDL

p-Isopropyltoluene ND 2.0 0.25 ug/L 06/22/20 15:36 1


5.0 0.25 ug/L 06/22/20 15:36 1sec-Butylbenzene ND

2.0 0.25 ug/L 06/22/20 15:36 1Styrene ND

5.0 0.25 ug/L 06/22/20 15:36 1tert-Butylbenzene ND

2.0 0.25 ug/L 06/22/20 15:36 1Tetrachloroethene ND

2.0 0.25 ug/L 06/22/20 15:36 1Toluene ND

2.0 0.25 ug/L 06/22/20 15:36 1trans-1,2-Dichloroethene ND

2.0 0.25 ug/L 06/22/20 15:36 1trans-1,3-Dichloropropene ND

2.0 0.25 ug/L 06/22/20 15:36 1Trichloroethene ND

5.0 0.25 ug/L 06/22/20 15:36 1Trichlorofluoromethane ND

5.0 0.25 ug/L 06/22/20 15:36 1Vinyl chloride ND

4-Bromofluorobenzene (Surr) 102 80 - 120 06/22/20 15:36 1

Surrogate Dil FacAnalyzedPreparedQualifier Limits%Recovery

Dibromofluoromethane (Surr) 97 06/22/20 15:36 176 - 132

Toluene-d8 (Surr) 106 06/22/20 15:36 180 - 128

1,2-Dichloroethane-d4 (Surr) 91 06/22/20 15:36 170 - 130

Method: 8270C - Semivolatile Organic Compounds (GC/MS)RL MDL

2,2'-Dichlorobenzil &

4,4'-Dichlorobenzil

ND 9.8 4.4 ug/L 06/19/20 08:13 06/23/20 12:51 1


2,4,6-Tribromophenol (Surr) 95 40 - 120 06/19/20 08:13 06/23/20 12:51 1


2-Fluorobiphenyl 81 06/19/20 08:13 06/23/20 12:51 150 - 120

2-Fluorophenol (Surr) 69 06/19/20 08:13 06/23/20 12:51 130 - 120

Nitrobenzene-d5 (Surr) 82 06/19/20 08:13 06/23/20 12:51 145 - 120

Phenol-d6 (Surr) 62 06/19/20 08:13 06/23/20 12:51 135 - 120

Terphenyl-d14 (Surr) 83 06/19/20 08:13 06/23/20 12:51 110 - 150

Method: 8081A - Organochlorine Pesticides (GC)RL MDL

2,4'-DDD ND 0.10 0.0025 ug/L 06/17/20 05:25 06/17/20 19:31 1


0.10 0.0025 ug/L 06/17/20 05:25 06/17/20 19:31 12,4'-DDE ND

0.10 0.0025 ug/L 06/17/20 05:25 06/17/20 19:31 12,4'-DDT 0.010 J

0.10 0.0025 ug/L 06/17/20 05:25 06/17/20 19:31 14,4'-DDD ND

0.10 0.0025 ug/L 06/17/20 05:25 06/17/20 19:31 14,4'-DDE ND

0.10 0.0025 ug/L 06/17/20 05:25 06/17/20 19:31 14,4'-DDT 0.0097 J

0.0050 0.0015 ug/L 06/17/20 05:25 06/17/20 19:31 1Aldrin ND

0.0050 0.0025 ug/L 06/17/20 05:25 06/17/20 19:31 1alpha-BHC ND

0.010 0.0040 ug/L 06/17/20 05:25 06/17/20 19:31 1beta-BHC ND

0.10 0.080 ug/L 06/17/20 05:25 06/17/20 19:31 1Chlordane ND

0.20 0.0035 ug/L 06/17/20 05:25 06/17/20 19:31 1delta-BHC ND

0.0050 0.0020 ug/L 06/17/20 05:25 06/17/20 19:31 1Dieldrin ND

0.10 0.0030 ug/L 06/17/20 05:25 06/17/20 19:31 1Endosulfan I ND

0.10 0.0020 ug/L 06/17/20 05:25 06/17/20 19:31 1Endosulfan II ND

0.20 0.0030 ug/L 06/17/20 05:25 06/17/20 19:31 1Endosulfan sulfate ND

0.10 0.0020 ug/L 06/17/20 05:25 06/17/20 19:31 1Endrin ND

0.10 0.0020 ug/L 06/17/20 05:25 06/17/20 19:31 1Endrin aldehyde ND

0.10 0.0070 ug/L 06/17/20 05:25 06/17/20 19:31 1Endrin ketone ND


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Method: 8081A - Organochlorine Pesticides (GC) (Continued)RL MDL

gamma-BHC (Lindane) ND 0.10 0.0030 ug/L 06/17/20 05:25 06/17/20 19:31 1


0.010 0.0030 ug/L 06/17/20 05:25 06/17/20 19:31 1Heptachlor ND

0.0050 0.0025 ug/L 06/17/20 05:25 06/17/20 19:31 1Heptachlor epoxide ND

0.10 0.0035 ug/L 06/17/20 05:25 06/17/20 19:31 1Methoxychlor ND

5.0 0.25 ug/L 06/17/20 05:25 06/17/20 19:31 1Toxaphene ND

DCB Decachlorobiphenyl (Surr) 82 28 - 108 06/17/20 05:25 06/17/20 19:31 1


Tetrachloro-m-xylene 68 06/17/20 05:25 06/17/20 19:31 110 - 123




1,1,1,2-Tetrachloroethane ND 2000 100 ug/L 06/22/20 16:04 400


800 100 ug/L 06/22/20 16:04 4001,1,1-Trichloroethane ND

800 100 ug/L 06/22/20 16:04 4001,1,2,2-Tetrachloroethane ND


800 100 ug/L 06/22/20 16:04 4001,1-Dichloroethane ND

2000 100 ug/L 06/22/20 16:04 4001,1-Dichloroethene ND

800 100 ug/L 06/22/20 16:04 4001,1-Dichloropropene ND

2000 160 ug/L 06/22/20 16:04 4001,2,3-Trichlorobenzene ND

4000 160 ug/L 06/22/20 16:04 4001,2,3-Trichloropropane ND


800 100 ug/L 06/22/20 16:04 4001,2,4-Trimethylbenzene ND

2000 200 ug/L 06/22/20 16:04 4001,2-Dibromo-3-Chloropropane ND

800 100 ug/L 06/22/20 16:04 4001,2-Dibromoethane (EDB) ND

800 100 ug/L 06/22/20 16:04 4001,2-Dichlorobenzene ND


800 100 ug/L 06/22/20 16:04 4001,2-Dichloropropane ND






2000 100 ug/L 06/22/20 16:04 4002-Chlorotoluene ND


800 100 ug/L 06/22/20 16:04 400Benzene 1400

2000 100 ug/L 06/22/20 16:04 400Bromobenzene ND

2000 100 ug/L 06/22/20 16:04 400Bromochloromethane ND

800 100 ug/L 06/22/20 16:04 400Bromodichloromethane ND

2000 160 ug/L 06/22/20 16:04 400Bromoform ND

2000 100 ug/L 06/22/20 16:04 400Bromomethane ND

400 100 ug/L 06/22/20 16:04 400Carbon tetrachloride ND

800 100 ug/L 06/22/20 16:04 400Chlorobenzene 1500

2000 160 ug/L 06/22/20 16:04 400Chloroethane ND

800 100 ug/L 06/22/20 16:04 400Chloroform 74000

2000 100 ug/L 06/22/20 16:04 400Chloromethane ND *


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cis-1,2-Dichloroethene ND 800 100 ug/L 06/22/20 16:04 400


800 100 ug/L 06/22/20 16:04 400cis-1,3-Dichloropropene ND

800 100 ug/L 06/22/20 16:04 400Dibromochloromethane ND

800 100 ug/L 06/22/20 16:04 400Dibromomethane ND

2000 160 ug/L 06/22/20 16:04 400Dichlorodifluoromethane ND

800 400 ug/L 06/22/20 16:04 400Dimethyl disulfide ND

800 100 ug/L 06/22/20 16:04 400Ethylbenzene ND

2000 100 ug/L 06/22/20 16:04 400Hexachlorobutadiene ND

800 100 ug/L 06/22/20 16:04 400Isopropylbenzene ND

800 200 ug/L 06/22/20 16:04 400m,p-Xylene ND

800 350 ug/L 06/22/20 16:04 400Methylene Chloride ND

2000 160 ug/L 06/22/20 16:04 400Naphthalene ND

2000 160 ug/L 06/22/20 16:04 400n-Butylbenzene ND

800 100 ug/L 06/22/20 16:04 400N-Propylbenzene ND

800 100 ug/L 06/22/20 16:04 400o-Xylene ND

800 100 ug/L 06/22/20 16:04 400p-Isopropyltoluene ND

2000 100 ug/L 06/22/20 16:04 400sec-Butylbenzene ND

800 100 ug/L 06/22/20 16:04 400Styrene ND

2000 100 ug/L 06/22/20 16:04 400tert-Butylbenzene ND

800 100 ug/L 06/22/20 16:04 400Tetrachloroethene ND

800 100 ug/L 06/22/20 16:04 400Toluene ND

800 100 ug/L 06/22/20 16:04 400trans-1,2-Dichloroethene ND

800 100 ug/L 06/22/20 16:04 400trans-1,3-Dichloropropene ND

800 100 ug/L 06/22/20 16:04 400Trichloroethene ND

2000 100 ug/L 06/22/20 16:04 400Trichlorofluoromethane ND

2000 100 ug/L 06/22/20 16:04 400Vinyl chloride ND




Toluene-d8 (Surr) 105 06/22/20 16:04 40080 - 128




4,4'-Dichlorobenzil

ND 9.7 4.4 ug/L 06/19/20 08:13 06/22/20 19:35 1




2-Fluorobiphenyl 80 06/19/20 08:13 06/22/20 19:35 150 - 120



Phenol-d6 (Surr) 82 06/19/20 08:13 06/22/20 19:35 135 - 120

Terphenyl-d14 (Surr) 90 06/19/20 08:13 06/22/20 19:35 110 - 150


2,4'-DDD ND 0.098 0.0025 ug/L 06/17/20 05:25 06/17/20 19:57 1


0.098 0.0025 ug/L 06/17/20 05:25 06/17/20 19:57 12,4'-DDE ND

0.098 0.0025 ug/L 06/17/20 05:25 06/17/20 19:57 12,4'-DDT ND


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4,4'-DDD ND 0.098 0.0025 ug/L 06/17/20 05:25 06/17/20 19:57 1


0.098 0.0025 ug/L 06/17/20 05:25 06/17/20 19:57 14,4'-DDE 0.0083 J

0.098 0.0025 ug/L 06/17/20 05:25 06/17/20 19:57 14,4'-DDT 0.0075 J p

0.0049 0.0015 ug/L 06/17/20 05:25 06/17/20 19:57 1Aldrin ND

0.0049 0.0025 ug/L 06/17/20 05:25 06/17/20 19:57 1alpha-BHC 0.023

0.0098 0.0039 ug/L 06/17/20 05:25 06/17/20 19:57 1beta-BHC ND

0.098 0.078 ug/L 06/17/20 05:25 06/17/20 19:57 1Chlordane ND

0.20 0.0034 ug/L 06/17/20 05:25 06/17/20 19:57 1delta-BHC ND

0.0049 0.0020 ug/L 06/17/20 05:25 06/17/20 19:57 1Dieldrin ND




0.098 0.0020 ug/L 06/17/20 05:25 06/17/20 19:57 1Endrin ND



0.098 0.0029 ug/L 06/17/20 05:25 06/17/20 19:57 1gamma-BHC (Lindane) 0.0065 J




4.9 0.25 ug/L 06/17/20 05:25 06/17/20 19:57 1Toxaphene ND







1,1,1,2-Tetrachloroethane ND 500 25 ug/L 06/22/20 17:00 100



200 25 ug/L 06/22/20 17:00 1001,1,2,2-Tetrachloroethane ND



500 25 ug/L 06/22/20 17:00 1001,1-Dichloroethene ND

200 25 ug/L 06/22/20 17:00 1001,1-Dichloropropene ND


1000 40 ug/L 06/22/20 17:00 1001,2,3-Trichloropropane ND

500 40 ug/L 06/22/20 17:00 1001,2,4-Trichlorobenzene 59 J


500 50 ug/L 06/22/20 17:00 1001,2-Dibromo-3-Chloropropane ND

200 25 ug/L 06/22/20 17:00 1001,2-Dibromoethane (EDB) ND

200 25 ug/L 06/22/20 17:00 1001,2-Dichlorobenzene 17000




200 25 ug/L 06/22/20 17:00 1001,3-Dichlorobenzene 710



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1,4-Dichlorobenzene 14000 200 25 ug/L 06/22/20 17:00 100





200 25 ug/L 06/22/20 17:00 100Benzene 390

500 25 ug/L 06/22/20 17:00 100Bromobenzene ND

500 25 ug/L 06/22/20 17:00 100Bromochloromethane ND

200 25 ug/L 06/22/20 17:00 100Bromodichloromethane ND

500 40 ug/L 06/22/20 17:00 100Bromoform ND

500 25 ug/L 06/22/20 17:00 100Bromomethane ND

100 25 ug/L 06/22/20 17:00 100Carbon tetrachloride ND

200 25 ug/L 06/22/20 17:00 100Chlorobenzene 11000

500 40 ug/L 06/22/20 17:00 100Chloroethane ND

200 25 ug/L 06/22/20 17:00 100Chloroform 18000

500 25 ug/L 06/22/20 17:00 100Chloromethane ND *

200 25 ug/L 06/22/20 17:00 100cis-1,2-Dichloroethene ND

200 25 ug/L 06/22/20 17:00 100cis-1,3-Dichloropropene ND

200 25 ug/L 06/22/20 17:00 100Dibromochloromethane ND

200 25 ug/L 06/22/20 17:00 100Dibromomethane ND

500 40 ug/L 06/22/20 17:00 100Dichlorodifluoromethane ND

200 100 ug/L 06/22/20 17:00 100Dimethyl disulfide ND

200 25 ug/L 06/22/20 17:00 100Ethylbenzene ND

500 25 ug/L 06/22/20 17:00 100Hexachlorobutadiene ND

200 25 ug/L 06/22/20 17:00 100Isopropylbenzene ND

200 50 ug/L 06/22/20 17:00 100m,p-Xylene ND

200 88 ug/L 06/22/20 17:00 100Methylene Chloride 94 J

500 40 ug/L 06/22/20 17:00 100Naphthalene ND

500 40 ug/L 06/22/20 17:00 100n-Butylbenzene ND

200 25 ug/L 06/22/20 17:00 100N-Propylbenzene ND

200 25 ug/L 06/22/20 17:00 100o-Xylene ND

200 25 ug/L 06/22/20 17:00 100p-Isopropyltoluene ND

500 25 ug/L 06/22/20 17:00 100sec-Butylbenzene ND

200 25 ug/L 06/22/20 17:00 100Styrene ND

500 25 ug/L 06/22/20 17:00 100tert-Butylbenzene ND

200 25 ug/L 06/22/20 17:00 100Tetrachloroethene ND

200 25 ug/L 06/22/20 17:00 100Toluene ND

200 25 ug/L 06/22/20 17:00 100trans-1,2-Dichloroethene ND

200 25 ug/L 06/22/20 17:00 100trans-1,3-Dichloropropene ND

200 25 ug/L 06/22/20 17:00 100Trichloroethene ND

500 25 ug/L 06/22/20 17:00 100Trichlorofluoromethane ND

500 25 ug/L 06/22/20 17:00 100Vinyl chloride ND




Toluene-d8 (Surr) 103 06/22/20 17:00 10080 - 128



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4,4'-Dichlorobenzil

ND 190 87 ug/L 06/19/20 08:13 06/22/20 20:00 20




2-Fluorobiphenyl 80 06/19/20 08:13 06/22/20 20:00 2050 - 120



Phenol-d6 (Surr) 69 06/19/20 08:13 06/22/20 20:00 2035 - 120

Terphenyl-d14 (Surr) 46 06/19/20 08:13 06/22/20 20:00 2010 - 150


2,4'-DDD ND 0.094 0.0024 ug/L 06/17/20 05:25 06/17/20 22:08 1


0.094 0.0024 ug/L 06/17/20 05:25 06/17/20 22:08 12,4'-DDE ND

0.094 0.0024 ug/L 06/17/20 05:25 06/17/20 22:08 12,4'-DDT ND

0.094 0.0024 ug/L 06/17/20 05:25 06/17/20 22:08 14,4'-DDD 0.019 J

0.094 0.0024 ug/L 06/17/20 05:25 06/17/20 22:08 14,4'-DDE ND

0.094 0.0024 ug/L 06/17/20 05:25 06/17/20 22:08 14,4'-DDT ND

0.0047 0.0014 ug/L 06/17/20 05:25 06/17/20 22:08 1Aldrin ND

0.0047 0.0024 ug/L 06/17/20 05:25 06/17/20 22:08 1alpha-BHC 0.22

0.0094 0.0038 ug/L 06/17/20 05:25 06/17/20 22:08 1beta-BHC 0.18 p

0.094 0.075 ug/L 06/17/20 05:25 06/17/20 22:08 1Chlordane ND

0.19 0.0033 ug/L 06/17/20 05:25 06/17/20 22:08 1delta-BHC ND

0.0047 0.0019 ug/L 06/17/20 05:25 06/17/20 22:08 1Dieldrin ND




0.094 0.0019 ug/L 06/17/20 05:25 06/17/20 22:08 1Endrin ND



0.094 0.0028 ug/L 06/17/20 05:25 06/17/20 22:08 1gamma-BHC (Lindane) 0.093 J p




4.7 0.24 ug/L 06/17/20 05:25 06/17/20 22:08 1Toxaphene ND







1,1,1,2-Tetrachloroethane ND 13 0.63 ug/L 06/22/20 17:55 2.5


5.0 0.63 ug/L 06/22/20 17:55 2.51,1,1-Trichloroethane ND

5.0 0.63 ug/L 06/22/20 17:55 2.51,1,2,2-Tetrachloroethane ND

5.0 0.63 ug/L 06/22/20 17:55 2.51,1,2-Trichloroethane ND


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1,1-Dichloroethane ND 5.0 0.63 ug/L 06/22/20 17:55 2.5


13 0.63 ug/L 06/22/20 17:55 2.51,1-Dichloroethene ND

5.0 0.63 ug/L 06/22/20 17:55 2.51,1-Dichloropropene ND

13 1.0 ug/L 06/22/20 17:55 2.51,2,3-Trichlorobenzene ND

25 1.0 ug/L 06/22/20 17:55 2.51,2,3-Trichloropropane ND

13 1.0 ug/L 06/22/20 17:55 2.51,2,4-Trichlorobenzene ND

5.0 0.63 ug/L 06/22/20 17:55 2.51,2,4-Trimethylbenzene ND

13 1.3 ug/L 06/22/20 17:55 2.51,2-Dibromo-3-Chloropropane ND

5.0 0.63 ug/L 06/22/20 17:55 2.51,2-Dibromoethane (EDB) ND

5.0 0.63 ug/L 06/22/20 17:55 2.51,2-Dichlorobenzene ND

5.0 0.63 ug/L 06/22/20 17:55 2.51,2-Dichloroethane ND

5.0 0.63 ug/L 06/22/20 17:55 2.51,2-Dichloropropane ND

5.0 0.63 ug/L 06/22/20 17:55 2.51,3,5-Trimethylbenzene ND





13 0.63 ug/L 06/22/20 17:55 2.52-Chlorotoluene ND

13 0.63 ug/L 06/22/20 17:55 2.54-Chlorotoluene ND

5.0 0.63 ug/L 06/22/20 17:55 2.5Benzene ND

13 0.63 ug/L 06/22/20 17:55 2.5Bromobenzene ND

13 0.63 ug/L 06/22/20 17:55 2.5Bromochloromethane ND

5.0 0.63 ug/L 06/22/20 17:55 2.5Bromodichloromethane ND

13 1.0 ug/L 06/22/20 17:55 2.5Bromoform ND

13 0.63 ug/L 06/22/20 17:55 2.5Bromomethane ND

2.5 0.63 ug/L 06/22/20 17:55 2.5Carbon tetrachloride 0.72 J

5.0 0.63 ug/L 06/22/20 17:55 2.5Chlorobenzene ND

13 1.0 ug/L 06/22/20 17:55 2.5Chloroethane ND

13 0.63 ug/L 06/22/20 17:55 2.5Chloromethane ND *

5.0 0.63 ug/L 06/22/20 17:55 2.5cis-1,2-Dichloroethene ND

5.0 0.63 ug/L 06/22/20 17:55 2.5cis-1,3-Dichloropropene ND

5.0 0.63 ug/L 06/22/20 17:55 2.5Dibromochloromethane ND

5.0 0.63 ug/L 06/22/20 17:55 2.5Dibromomethane ND

13 1.0 ug/L 06/22/20 17:55 2.5Dichlorodifluoromethane ND

5.0 2.5 ug/L 06/22/20 17:55 2.5Dimethyl disulfide ND

5.0 0.63 ug/L 06/22/20 17:55 2.5Ethylbenzene ND

13 0.63 ug/L 06/22/20 17:55 2.5Hexachlorobutadiene ND

5.0 0.63 ug/L 06/22/20 17:55 2.5Isopropylbenzene ND

5.0 1.3 ug/L 06/22/20 17:55 2.5m,p-Xylene ND

5.0 2.2 ug/L 06/22/20 17:55 2.5Methylene Chloride ND

13 1.0 ug/L 06/22/20 17:55 2.5Naphthalene ND

13 1.0 ug/L 06/22/20 17:55 2.5n-Butylbenzene ND

5.0 0.63 ug/L 06/22/20 17:55 2.5N-Propylbenzene ND

5.0 0.63 ug/L 06/22/20 17:55 2.5o-Xylene ND

5.0 0.63 ug/L 06/22/20 17:55 2.5p-Isopropyltoluene ND

13 0.63 ug/L 06/22/20 17:55 2.5sec-Butylbenzene ND

5.0 0.63 ug/L 06/22/20 17:55 2.5Styrene ND

13 0.63 ug/L 06/22/20 17:55 2.5tert-Butylbenzene ND

5.0 0.63 ug/L 06/22/20 17:55 2.5Tetrachloroethene ND


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Toluene ND 5.0 0.63 ug/L 06/22/20 17:55 2.5


5.0 0.63 ug/L 06/22/20 17:55 2.5trans-1,2-Dichloroethene ND

5.0 0.63 ug/L 06/22/20 17:55 2.5trans-1,3-Dichloropropene ND

5.0 0.63 ug/L 06/22/20 17:55 2.5Trichloroethene ND

13 0.63 ug/L 06/22/20 17:55 2.5Trichlorofluoromethane ND

13 0.63 ug/L 06/22/20 17:55 2.5Vinyl chloride ND

4-Bromofluorobenzene (Surr) 103 80 - 120 06/22/20 17:55 2.5


Dibromofluoromethane (Surr) 101 06/22/20 17:55 2.576 - 132

Toluene-d8 (Surr) 106 06/22/20 17:55 2.580 - 128

1,2-Dichloroethane-d4 (Surr) 93 06/22/20 17:55 2.570 - 130

Method: 8260B - Volatile Organic Compounds (GC/MS) - DLRL MDL

Chloroform 530 40 5.0 ug/L 06/22/20 18:23 20





Toluene-d8 (Surr) 106 06/22/20 18:23 2080 - 128




4,4'-Dichlorobenzil

ND 9.7 4.4 ug/L 06/19/20 08:13 06/22/20 20:26 1




2-Fluorobiphenyl 83 06/19/20 08:13 06/22/20 20:26 150 - 120



Phenol-d6 (Surr) 79 06/19/20 08:13 06/22/20 20:26 135 - 120

Terphenyl-d14 (Surr) 90 06/19/20 08:13 06/22/20 20:26 110 - 150


2,4'-DDD ND 0.097 0.0024 ug/L 06/17/20 05:25 06/17/20 20:24 1


0.097 0.0024 ug/L 06/17/20 05:25 06/17/20 20:24 12,4'-DDE ND

0.097 0.0024 ug/L 06/17/20 05:25 06/17/20 20:24 12,4'-DDT ND

0.097 0.0024 ug/L 06/17/20 05:25 06/17/20 20:24 14,4'-DDD ND

0.097 0.0024 ug/L 06/17/20 05:25 06/17/20 20:24 14,4'-DDE ND

0.097 0.0024 ug/L 06/17/20 05:25 06/17/20 20:24 14,4'-DDT ND

0.0049 0.0015 ug/L 06/17/20 05:25 06/17/20 20:24 1Aldrin ND

0.0049 0.0024 ug/L 06/17/20 05:25 06/17/20 20:24 1alpha-BHC 0.0028 J

0.0097 0.0039 ug/L 06/17/20 05:25 06/17/20 20:24 1beta-BHC ND

0.097 0.078 ug/L 06/17/20 05:25 06/17/20 20:24 1Chlordane ND

0.19 0.0034 ug/L 06/17/20 05:25 06/17/20 20:24 1delta-BHC ND

0.0049 0.0019 ug/L 06/17/20 05:25 06/17/20 20:24 1Dieldrin ND



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Endosulfan II ND 0.097 0.0019 ug/L 06/17/20 05:25 06/17/20 20:24 1



0.097 0.0019 ug/L 06/17/20 05:25 06/17/20 20:24 1Endrin ND



0.097 0.0029 ug/L 06/17/20 05:25 06/17/20 20:24 1gamma-BHC (Lindane) ND




4.9 0.24 ug/L 06/17/20 05:25 06/17/20 20:24 1Toxaphene ND




Lab Sample ID: 440-267502-5Client Sample ID: TB-20200615Matrix: WaterDate Collected: 06/15/20 07:45










2.0 0.25 ug/L 06/23/20 09:51 11,1-Dichloropropene ND

















2.0 0.25 ug/L 06/23/20 09:51 1Benzene ND




5.0 0.40 ug/L 06/23/20 09:51 1Bromoform ND



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Lab Sample ID: 440-267502-5Client Sample ID: TB-20200615Matrix: WaterDate Collected: 06/15/20 07:45



Carbon tetrachloride ND 1.0 0.25 ug/L 06/23/20 09:51 1




2.0 0.25 ug/L 06/23/20 09:51 1Chloroform ND

5.0 0.25 ug/L 06/23/20 09:51 1Chloromethane ND





5.0 0.40 ug/L 06/23/20 09:51 1Dichlorodifluoromethane ND *





2.0 0.50 ug/L 06/23/20 09:51 1m,p-Xylene ND





2.0 0.25 ug/L 06/23/20 09:51 1o-Xylene ND

2.0 0.25 ug/L 06/23/20 09:51 1p-Isopropyltoluene ND


2.0 0.25 ug/L 06/23/20 09:51 1Styrene ND



2.0 0.25 ug/L 06/23/20 09:51 1Toluene ND

2.0 0.25 ug/L 06/23/20 09:51 1trans-1,2-Dichloroethene ND








Toluene-d8 (Surr) 104 06/23/20 09:51 180 - 128


Lab Sample ID: 440-267502-6Client Sample ID: PL-510-20200615Matrix: WaterDate Collected: 06/15/20 11:35











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1,1-Dichloropropene ND 2.0 0.25 ug/L 06/23/20 10:18 1


















2.0 0.25 ug/L 06/23/20 10:18 1Benzene ND




5.0 0.40 ug/L 06/23/20 10:18 1Bromoform ND


1.0 0.25 ug/L 06/23/20 10:18 1Carbon tetrachloride ND



2.0 0.25 ug/L 06/23/20 10:18 1Chloroform ND

5.0 0.25 ug/L 06/23/20 10:18 1Chloromethane ND





5.0 0.40 ug/L 06/23/20 10:18 1Dichlorodifluoromethane ND *





2.0 0.50 ug/L 06/23/20 10:18 1m,p-Xylene ND





2.0 0.25 ug/L 06/23/20 10:18 1o-Xylene ND

2.0 0.25 ug/L 06/23/20 10:18 1p-Isopropyltoluene ND


2.0 0.25 ug/L 06/23/20 10:18 1Styrene ND



2.0 0.25 ug/L 06/23/20 10:18 1Toluene ND


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trans-1,2-Dichloroethene ND 2.0 0.25 ug/L 06/23/20 10:18 1









Toluene-d8 (Surr) 103 06/23/20 10:18 180 - 128



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Surrogate SummaryJob ID: 440-267502-1Client: de maximis, inc.SDG: Henderson, NVProject/Site: Montrose

Method: 8260B - Volatile Organic Compounds (GC/MS)Prep Type: Total/NAMatrix: Water

Lab Sample ID Client Sample ID (80-120) (76-132) (80-128) (70-130)

BFB DBFM TOL DCA

104 96 101 94440-267349-A-18 MS

Percent Surrogate Recovery (Acceptance Limits)

Matrix Spike

102 98 100 94440-267349-A-18 MSD Matrix Spike Duplicate

102 97 106 91440-267502-1 MW-1-20200615

105 102 105 90440-267502-2 MW-2-20200615

104 99 103 92440-267502-3 MW-3-20200615

103 101 106 93440-267502-4 MW-4-20200615

103 100 106 92440-267502-4 - DL MW-4-20200615

100 104 104 109440-267502-5 TB-20200615

106 107 103 112440-267502-6 PL-510-20200615

101 107 102 117440-267641-A-1 MS Matrix Spike

102 107 102 113440-267641-A-1 MSD Matrix Spike Duplicate

105 94 103 85LCS 440-613704/1002 Lab Control Sample

100 105 98 113LCS 440-613896/1002 Lab Control Sample

106 95 104 91MB 440-613704/4 Method Blank

104 109 104 113MB 440-613896/4 Method Blank

Surrogate Legend

BFB = 4-Bromofluorobenzene (Surr)

DBFM = Dibromofluoromethane (Surr)

TOL = Toluene-d8 (Surr)

DCA = 1,2-Dichloroethane-d4 (Surr)

Method: 8270C - Semivolatile Organic Compounds (GC/MS)Prep Type: Total/NAMatrix: Water

Lab Sample ID Client Sample ID (40-120) (50-120) (30-120) (45-120) (35-120) (10-150)

TBP FBP 2FP NBZ PHL6 TPHL

95 81 69 82 62 83440-267502-1


MW-1-20200615

92 80 75 8284 90440-267502-2 MW-2-20200615

81 80 66 6978 46440-267502-3 MW-3-20200615

86 83 74 7981 90440-267502-4 MW-4-20200615

93 80 70 7991 87LCS 440-613491/2-A Lab Control Sample

91 81 77 8585 89LCSD 440-613491/3-A Lab Control Sample Dup

95 84 81 8985 96MB 440-613491/1-A Method Blank

99 84 72 7282 89MB 440-613491/1-A Method Blank

Surrogate Legend

TBP = 2,4,6-Tribromophenol (Surr)

FBP = 2-Fluorobiphenyl

2FP = 2-Fluorophenol (Surr)

NBZ = Nitrobenzene-d5 (Surr)

PHL6 = Phenol-d6 (Surr)

TPHL = Terphenyl-d14 (Surr)


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Surrogate SummaryJob ID: 440-267502-1Client: de maximis, inc.SDG: Henderson, NVProject/Site: Montrose

Method: 8081A - Organochlorine Pesticides (GC)Prep Type: Total/NAMatrix: Water

Lab Sample ID Client Sample ID (28-108) (10-123)

DCB1 TCX1

82 68440-267502-1


MW-1-20200615

94 81440-267502-2 MW-2-20200615

53 104440-267502-3 MW-3-20200615

90 71440-267502-4 MW-4-20200615

81 71LCS 440-613067/2-A Lab Control Sample

80 69LCSD 440-613067/3-A Lab Control Sample Dup

63 57MB 440-613067/1-A Method Blank

Surrogate Legend

DCB = DCB Decachlorobiphenyl (Surr)

TCX = Tetrachloro-m-xylene


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Method SummaryJob ID: 440-267502-1Client: de maximis, inc.SDG: Henderson, NVProject/Site: Montrose

Method Method Description LaboratoryProtocol

SW8468260B Volatile Organic Compounds (GC/MS) TAL IRV

SW8468270C Semivolatile Organic Compounds (GC/MS) TAL IRV

SW8468081A Organochlorine Pesticides (GC) TAL IRV

SW8463510C Liquid-Liquid Extraction (Separatory Funnel) TAL IRV

SW8463520C Liquid-Liquid Extraction (Continuous) TAL IRV

SW8465030B Purge and Trap TAL IRV

Protocol References:

SW846 = "Test Methods For Evaluating Solid Waste, Physical/Chemical Methods", Third Edition, November 1986 And Its Updates.

Laboratory References:

TAL IRV = Eurofins Calscience Irvine, 17461 Derian Ave, Suite 100, Irvine, CA 92614-5817, TEL (949)261-1022


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Lab ChronicleClient: de maximis, inc. Job ID: 440-267502-1Project/Site: Montrose SDG: Henderson, NV

Client Sample ID: MW-1-20200615 Lab Sample ID: 440-267502-1Matrix: WaterDate Collected: 06/15/20 11:48


Analysis 8260B TCN06/22/20 15:361 TAL IRV613704

Type

Batch

Method

Batch

Prep Type LabAnalystRun

Prepared

or Analyzed

Initial

Amount Amount

Final Batch

NumberFactor

Dil

Total/NA 10 mL 10 mL

Prep 3520C 613491 06/19/20 08:13 JS1 TAL IRVTotal/NA 1025 mL 2.0 mL

Analysis 8270C 1 613913 06/23/20 12:51 L1B TAL IRVTotal/NA

Prep 3510C 613067 06/17/20 05:25 L1A TAL IRVTotal/NA 1000 mL 2 mL

Analysis 8081A 1 613177 06/17/20 19:31 JM TAL IRVTotal/NA




Type

Batch

Method

Batch


Prepared

or Analyzed

Initial

Amount Amount

Final Batch

NumberFactor

Dil









Type

Batch

Method

Batch


Prepared

or Analyzed

Initial

Amount Amount

Final Batch

NumberFactor

Dil








Analysis 8260B TCN06/22/20 17:552.5 TAL IRV613704

Type

Batch

Method

Batch


Prepared

or Analyzed

Initial

Amount Amount

Final Batch

NumberFactor

Dil


Analysis 8260B DL 20 613704 06/22/20 18:23 TCN TAL IRVTotal/NA 10 mL 10 mL






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Lab ChronicleClient: de maximis, inc. Job ID: 440-267502-1Project/Site: Montrose SDG: Henderson, NV

Client Sample ID: TB-20200615 Lab Sample ID: 440-267502-5Matrix: WaterDate Collected: 06/15/20 07:45



Type

Batch

Method

Batch


Prepared

or Analyzed

Initial

Amount Amount

Final Batch

NumberFactor

Dil


Client Sample ID: PL-510-20200615 Lab Sample ID: 440-267502-6Matrix: WaterDate Collected: 06/15/20 11:35



Type

Batch

Method

Batch


Prepared

or Analyzed

Initial

Amount Amount

Final Batch

NumberFactor

Dil


Laboratory References:

TAL IRV = Eurofins Calscience Irvine, 17461 Derian Ave, Suite 100, Irvine, CA 92614-5817, TEL (949)261-1022


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QC Sample ResultsJob ID: 440-267502-1Client: de maximis, inc.SDG: Henderson, NVProject/Site: Montrose

Method: 8260B - Volatile Organic Compounds (GC/MS)

Client Sample ID: Method BlankLab Sample ID: MB 440-613704/4Matrix: Water Prep Type: Total/NAAnalysis Batch: 613704

RL MDL


MB MB

Analyte Dil FacAnalyzedPreparedDUnitResult Qualifier

ND 0.252.0 ug/L 06/22/20 08:25 11,1,1-Trichloroethane

ND 0.252.0 ug/L 06/22/20 08:25 11,1,2,2-Tetrachloroethane


ND 0.252.0 ug/L 06/22/20 08:25 11,1-Dichloroethane

ND 0.255.0 ug/L 06/22/20 08:25 11,1-Dichloroethene

ND 0.252.0 ug/L 06/22/20 08:25 11,1-Dichloropropene

ND 0.405.0 ug/L 06/22/20 08:25 11,2,3-Trichlorobenzene

ND 0.4010 ug/L 06/22/20 08:25 11,2,3-Trichloropropane


ND 0.252.0 ug/L 06/22/20 08:25 11,2,4-Trimethylbenzene

ND 0.505.0 ug/L 06/22/20 08:25 11,2-Dibromo-3-Chloropropane

ND 0.252.0 ug/L 06/22/20 08:25 11,2-Dibromoethane (EDB)

ND 0.252.0 ug/L 06/22/20 08:25 11,2-Dichlorobenzene


ND 0.252.0 ug/L 06/22/20 08:25 11,2-Dichloropropane






ND 0.255.0 ug/L 06/22/20 08:25 12-Chlorotoluene


ND 0.252.0 ug/L 06/22/20 08:25 1Benzene

ND 0.255.0 ug/L 06/22/20 08:25 1Bromobenzene

ND 0.255.0 ug/L 06/22/20 08:25 1Bromochloromethane

ND 0.252.0 ug/L 06/22/20 08:25 1Bromodichloromethane

ND 0.405.0 ug/L 06/22/20 08:25 1Bromoform

ND 0.255.0 ug/L 06/22/20 08:25 1Bromomethane

ND 0.251.0 ug/L 06/22/20 08:25 1Carbon tetrachloride

ND 0.252.0 ug/L 06/22/20 08:25 1Chlorobenzene

ND 0.405.0 ug/L 06/22/20 08:25 1Chloroethane

ND 0.252.0 ug/L 06/22/20 08:25 1Chloroform

ND 0.255.0 ug/L 06/22/20 08:25 1Chloromethane

ND 0.252.0 ug/L 06/22/20 08:25 1cis-1,2-Dichloroethene

ND 0.252.0 ug/L 06/22/20 08:25 1cis-1,3-Dichloropropene

ND 0.252.0 ug/L 06/22/20 08:25 1Dibromochloromethane

ND 0.252.0 ug/L 06/22/20 08:25 1Dibromomethane

ND 0.405.0 ug/L 06/22/20 08:25 1Dichlorodifluoromethane

ND 1.02.0 ug/L 06/22/20 08:25 1Dimethyl disulfide

ND 0.252.0 ug/L 06/22/20 08:25 1Ethylbenzene

ND 0.255.0 ug/L 06/22/20 08:25 1Hexachlorobutadiene

ND 0.252.0 ug/L 06/22/20 08:25 1Isopropylbenzene

ND 0.502.0 ug/L 06/22/20 08:25 1m,p-Xylene

ND 0.882.0 ug/L 06/22/20 08:25 1Methylene Chloride

ND 0.405.0 ug/L 06/22/20 08:25 1Naphthalene

ND 0.405.0 ug/L 06/22/20 08:25 1n-Butylbenzene

ND 0.252.0 ug/L 06/22/20 08:25 1N-Propylbenzene


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Method: 8260B - Volatile Organic Compounds (GC/MS) (Continued)


RL MDL

o-Xylene ND 2.0 0.25 ug/L 06/22/20 08:25 1

MB MB


ND 0.252.0 ug/L 06/22/20 08:25 1p-Isopropyltoluene

ND 0.255.0 ug/L 06/22/20 08:25 1sec-Butylbenzene

ND 0.252.0 ug/L 06/22/20 08:25 1Styrene

ND 0.255.0 ug/L 06/22/20 08:25 1tert-Butylbenzene

ND 0.252.0 ug/L 06/22/20 08:25 1Tetrachloroethene

ND 0.252.0 ug/L 06/22/20 08:25 1Toluene

ND 0.252.0 ug/L 06/22/20 08:25 1trans-1,2-Dichloroethene

ND 0.252.0 ug/L 06/22/20 08:25 1trans-1,3-Dichloropropene

ND 0.252.0 ug/L 06/22/20 08:25 1Trichloroethene

ND 0.255.0 ug/L 06/22/20 08:25 1Trichlorofluoromethane

ND 0.255.0 ug/L 06/22/20 08:25 1Vinyl chloride


MB MB

Surrogate Dil FacPrepared AnalyzedQualifier Limits%Recovery

95 06/22/20 08:25 1Dibromofluoromethane (Surr) 76 - 132

104 06/22/20 08:25 1Toluene-d8 (Surr) 80 - 128

91 06/22/20 08:25 11,2-Dichloroethane-d4 (Surr) 70 - 130

Client Sample ID: Lab Control SampleLab Sample ID: LCS 440-613704/1002Matrix: Water Prep Type: Total/NAAnalysis Batch: 613704

1,1,1,2-Tetrachloroethane 25.0 23.3 ug/L 93 60 - 141

Analyte

LCS LCS

DUnitResult Qualifier %Rec

Spike

Added

%Rec.

Limits

1,1,1-Trichloroethane 25.0 20.3 ug/L 81 70 - 130



1,1-Dichloroethane 25.0 26.4 ug/L 106 64 - 130

1,1-Dichloroethene 25.0 25.0 ug/L 100 70 - 130

1,1-Dichloropropene 25.0 26.8 ug/L 107 70 - 130

1,2,3-Trichlorobenzene 25.0 25.2 ug/L 101 60 - 140

1,2,3-Trichloropropane 25.0 23.8 ug/L 95 63 - 130


1,2,4-Trimethylbenzene 25.0 28.7 ug/L 115 70 - 135

1,2-Dibromo-3-Chloropropane 25.0 24.0 ug/L 96 52 - 140

1,2-Dibromoethane (EDB) 25.0 25.2 ug/L 101 70 - 130

1,2-Dichlorobenzene 25.0 27.4 ug/L 110 70 - 130


1,2-Dichloropropane 25.0 27.9 ug/L 112 67 - 130






2-Chlorotoluene 25.0 26.9 ug/L 108 70 - 130


Benzene 25.0 28.2 ug/L 113 68 - 130


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Bromobenzene 25.0 25.2 ug/L 101 70 - 130

Analyte

LCS LCS


Spike

Added

%Rec.

Limits

Bromochloromethane 25.0 25.0 ug/L 100 70 - 130

Bromodichloromethane 25.0 23.5 ug/L 94 70 - 132

Bromoform 25.0 19.6 ug/L 79 60 - 148

Bromomethane 25.0 27.3 ug/L 109 64 - 139

Carbon tetrachloride 25.0 20.9 ug/L 84 60 - 150

Chlorobenzene 25.0 26.9 ug/L 108 70 - 130

Chloroethane 25.0 30.5 ug/L 122 64 - 135

Chloroform 25.0 21.6 ug/L 86 70 - 130

Chloromethane 25.0 35.7 * ug/L 143 47 - 140

cis-1,2-Dichloroethene 25.0 25.0 ug/L 100 70 - 133

cis-1,3-Dichloropropene 25.0 26.7 ug/L 107 70 - 133

Dibromochloromethane 25.0 22.5 ug/L 90 69 - 145

Dibromomethane 25.0 24.3 ug/L 97 70 - 130

Dichlorodifluoromethane 25.0 29.3 ug/L 117 29 - 150

Ethylbenzene 25.0 25.8 ug/L 103 70 - 130

Hexachlorobutadiene 25.0 23.1 ug/L 92 10 - 150

Isopropylbenzene 25.0 27.3 ug/L 109 70 - 136

m,p-Xylene 25.0 27.5 ug/L 110 70 - 130

Methylene Chloride 25.0 25.2 ug/L 101 52 - 130

Naphthalene 25.0 27.1 ug/L 108 60 - 140

n-Butylbenzene 25.0 28.8 ug/L 115 65 - 150

N-Propylbenzene 25.0 28.9 ug/L 116 67 - 139

o-Xylene 25.0 27.7 ug/L 111 70 - 130

p-Isopropyltoluene 25.0 28.8 ug/L 115 70 - 132

sec-Butylbenzene 25.0 29.1 ug/L 117 70 - 138

Styrene 25.0 26.7 ug/L 107 70 - 134

tert-Butylbenzene 25.0 28.0 ug/L 112 70 - 130

Tetrachloroethene 25.0 24.8 ug/L 99 70 - 130

Toluene 25.0 27.3 ug/L 109 70 - 130

trans-1,2-Dichloroethene 25.0 25.9 ug/L 104 70 - 130

trans-1,3-Dichloropropene 25.0 25.5 ug/L 102 70 - 132

Trichloroethene 25.0 26.5 ug/L 106 70 - 130

Trichlorofluoromethane 25.0 21.9 ug/L 88 60 - 150

Vinyl chloride 25.0 31.9 ug/L 128 59 - 133

4-Bromofluorobenzene (Surr) 80 - 120

Surrogate

105

LCS LCS

Qualifier Limits%Recovery

94Dibromofluoromethane (Surr) 76 - 132

103Toluene-d8 (Surr) 80 - 128

851,2-Dichloroethane-d4 (Surr) 70 - 130

Client Sample ID: Matrix SpikeLab Sample ID: 440-267349-A-18 MSMatrix: Water Prep Type: Total/NAAnalysis Batch: 613704

1,1,1,2-Tetrachloroethane ND 10.0 8.93 ug/L 89 60 - 149

Analyte

MS MS


Spike

Added

Sample

Result

Sample

Qualifier

%Rec.

Limits


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1,1,1-Trichloroethane 0.34 J 10.0 8.14 ug/L 78 70 - 130

Analyte

MS MS


Spike

Added

Sample

Result

Sample

Qualifier

%Rec.

Limits


1,1,2-Trichloroethane ND 10.0 11.7 ug/L 117 70 - 130

1,1-Dichloroethane 6.5 10.0 16.5 ug/L 100 65 - 130

1,1-Dichloroethene 9.9 10.0 18.9 ug/L 90 70 - 130

1,1-Dichloropropene ND 10.0 10.3 ug/L 103 64 - 130

1,2,3-Trichlorobenzene ND 10.0 9.53 ug/L 95 60 - 140

1,2,3-Trichloropropane ND 10.0 9.61 J ug/L 96 60 - 130


1,2,4-Trimethylbenzene ND 10.0 10.4 ug/L 104 70 - 130

1,2-Dibromo-3-Chloropropane ND 10.0 10.1 ug/L 101 48 - 140

1,2-Dibromoethane (EDB) ND 10.0 9.83 ug/L 98 70 - 131

1,2-Dichlorobenzene ND 10.0 10.3 ug/L 103 70 - 130

1,2-Dichloroethane ND 10.0 8.99 ug/L 90 56 - 146

1,2-Dichloropropane ND 10.0 10.8 ug/L 108 69 - 130






2-Chlorotoluene ND 10.0 10.2 ug/L 102 70 - 130


Benzene ND 10.0 10.9 ug/L 109 66 - 130

Bromobenzene ND 10.0 9.30 ug/L 93 70 - 130

Bromochloromethane ND 10.0 9.90 ug/L 99 70 - 130

Bromodichloromethane ND 10.0 9.05 ug/L 90 70 - 138

Bromoform ND 10.0 7.75 ug/L 77 59 - 150

Bromomethane ND 10.0 10.4 ug/L 104 62 - 131

Carbon tetrachloride ND 10.0 8.12 ug/L 81 60 - 150

Chlorobenzene ND 10.0 10.1 ug/L 101 70 - 130

Chloroethane ND 10.0 11.2 ug/L 112 68 - 130

Chloroform ND 10.0 8.56 ug/L 86 70 - 130

Chloromethane ND * 10.0 13.5 ug/L 135 39 - 144

cis-1,2-Dichloroethene 1.8 J 10.0 11.3 ug/L 94 70 - 130

cis-1,3-Dichloropropene ND 10.0 9.95 ug/L 99 70 - 133

Dibromochloromethane ND 10.0 8.61 ug/L 86 70 - 148

Dibromomethane ND 10.0 10.2 ug/L 102 70 - 130

Dichlorodifluoromethane ND 10.0 10.8 ug/L 108 25 - 142

Ethylbenzene ND 10.0 9.73 ug/L 97 70 - 130

Hexachlorobutadiene ND 10.0 8.59 ug/L 86 10 - 150

Isopropylbenzene ND 10.0 9.94 ug/L 99 70 - 132

m,p-Xylene ND 10.0 10.4 ug/L 104 70 - 133

Methylene Chloride ND 10.0 9.70 ug/L 97 52 - 130

Naphthalene ND 10.0 10.5 ug/L 105 60 - 140

n-Butylbenzene ND 10.0 10.6 ug/L 106 61 - 149

N-Propylbenzene ND 10.0 10.9 ug/L 109 66 - 135

o-Xylene ND 10.0 10.6 ug/L 106 70 - 133

p-Isopropyltoluene ND 10.0 10.8 ug/L 108 70 - 130

sec-Butylbenzene ND 10.0 11.2 ug/L 112 67 - 134


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Styrene ND 10.0 9.76 ug/L 98 29 - 150

Analyte

MS MS


Spike

Added

Sample

Result

Sample

Qualifier

%Rec.

Limits

tert-Butylbenzene ND 10.0 10.4 ug/L 104 70 - 130

Tetrachloroethene 8.5 10.0 17.6 ug/L 90 70 - 137

Toluene ND 10.0 10.4 ug/L 104 70 - 130

trans-1,2-Dichloroethene ND 10.0 10.2 ug/L 102 70 - 130

trans-1,3-Dichloropropene ND 10.0 9.43 ug/L 94 70 - 138

Trichloroethene 3.7 10.0 13.8 ug/L 101 70 - 130

Trichlorofluoromethane ND 10.0 8.58 ug/L 86 60 - 150

Vinyl chloride ND 10.0 12.3 ug/L 123 50 - 137


Surrogate

104

MS MS





Client Sample ID: Matrix Spike DuplicateLab Sample ID: 440-267349-A-18 MSDMatrix: Water Prep Type: Total/NAAnalysis Batch: 613704

1,1,1,2-Tetrachloroethane ND 10.0 9.02 ug/L 90 60 - 149 1 20

Analyte

MSD MSD


Spike

Added

Sample

Result

Sample

Qualifier

%Rec.

Limits LimitRPD

RPD

1,1,1-Trichloroethane 0.34 J 10.0 8.30 ug/L 80 70 - 130 2 20


1,1,2-Trichloroethane ND 10.0 11.6 ug/L 116 70 - 130 1 25

1,1-Dichloroethane 6.5 10.0 16.5 ug/L 100 65 - 130 0 20

1,1-Dichloroethene 9.9 10.0 19.1 ug/L 92 70 - 130 1 20

1,1-Dichloropropene ND 10.0 10.4 ug/L 104 64 - 130 1 20

1,2,3-Trichlorobenzene ND 10.0 10.1 ug/L 101 60 - 140 5 20

1,2,3-Trichloropropane ND 10.0 10.4 ug/L 104 60 - 130 7 30


1,2,4-Trimethylbenzene ND 10.0 10.7 ug/L 107 70 - 130 4 25

1,2-Dibromo-3-Chloropropane ND 10.0 11.1 ug/L 111 48 - 140 9 30

1,2-Dibromoethane (EDB) ND 10.0 10.6 ug/L 106 70 - 131 7 25

1,2-Dichlorobenzene ND 10.0 10.7 ug/L 107 70 - 130 5 20

1,2-Dichloroethane ND 10.0 9.33 ug/L 93 56 - 146 4 20

1,2-Dichloropropane ND 10.0 11.3 ug/L 113 69 - 130 5 20






2-Chlorotoluene ND 10.0 10.5 ug/L 105 70 - 130 3 20


Benzene ND 10.0 11.2 ug/L 112 66 - 130 3 20

Bromobenzene ND 10.0 9.54 ug/L 95 70 - 130 3 20

Bromochloromethane ND 10.0 10.2 ug/L 102 70 - 130 3 25

Bromodichloromethane ND 10.0 9.13 ug/L 91 70 - 138 1 20


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Bromoform ND 10.0 8.47 ug/L 85 59 - 150 9 25

Analyte

MSD MSD


Spike

Added

Sample

Result

Sample

Qualifier

%Rec.

Limits LimitRPD

RPD

Bromomethane ND 10.0 10.5 ug/L 105 62 - 131 1 25

Carbon tetrachloride ND 10.0 8.35 ug/L 83 60 - 150 3 25

Chlorobenzene ND 10.0 10.4 ug/L 104 70 - 130 3 20

Chloroethane ND 10.0 11.3 ug/L 113 68 - 130 1 25

Chloroform ND 10.0 8.68 ug/L 87 70 - 130 1 20

Chloromethane ND * 10.0 14.0 ug/L 140 39 - 144 3 25

cis-1,2-Dichloroethene 1.8 J 10.0 11.6 ug/L 97 70 - 130 3 20

cis-1,3-Dichloropropene ND 10.0 10.5 ug/L 105 70 - 133 6 20

Dibromochloromethane ND 10.0 9.04 ug/L 90 70 - 148 5 25

Dibromomethane ND 10.0 10.5 ug/L 105 70 - 130 4 25

Dichlorodifluoromethane ND 10.0 11.1 ug/L 111 25 - 142 3 30

Ethylbenzene ND 10.0 9.85 ug/L 99 70 - 130 1 20

Hexachlorobutadiene ND 10.0 8.85 ug/L 88 10 - 150 3 20

Isopropylbenzene ND 10.0 10.3 ug/L 103 70 - 132 3 20

m,p-Xylene ND 10.0 10.5 ug/L 105 70 - 133 1 25

Methylene Chloride ND 10.0 10.3 ug/L 103 52 - 130 6 20

Naphthalene ND 10.0 11.2 ug/L 112 60 - 140 6 30

n-Butylbenzene ND 10.0 10.8 ug/L 108 61 - 149 2 20

N-Propylbenzene ND 10.0 11.1 ug/L 111 66 - 135 1 20

o-Xylene ND 10.0 10.6 ug/L 106 70 - 133 0 20

p-Isopropyltoluene ND 10.0 10.8 ug/L 108 70 - 130 1 20

sec-Butylbenzene ND 10.0 11.3 ug/L 113 67 - 134 1 20

Styrene ND 10.0 10.2 ug/L 102 29 - 150 5 35

tert-Butylbenzene ND 10.0 10.5 ug/L 105 70 - 130 1 20

Tetrachloroethene 8.5 10.0 17.0 ug/L 85 70 - 137 3 20

Toluene ND 10.0 10.6 ug/L 106 70 - 130 2 20

trans-1,2-Dichloroethene ND 10.0 10.3 ug/L 103 70 - 130 0 20

trans-1,3-Dichloropropene ND 10.0 10.4 ug/L 104 70 - 138 10 25

Trichloroethene 3.7 10.0 13.8 ug/L 101 70 - 130 0 20

Trichlorofluoromethane ND 10.0 8.97 ug/L 90 60 - 150 5 25

Vinyl chloride ND 10.0 12.8 ug/L 128 50 - 137 4 30


Surrogate

102

MSD MSD






RL MDL


MB MB



ND 0.252.0 ug/L 06/23/20 08:29 11,1,2,2-Tetrachloroethane



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RL MDL

1,1-Dichloroethane ND 2.0 0.25 ug/L 06/23/20 08:29 1

MB MB


ND 0.255.0 ug/L 06/23/20 08:29 11,1-Dichloroethene

ND 0.252.0 ug/L 06/23/20 08:29 11,1-Dichloropropene


ND 0.4010 ug/L 06/23/20 08:29 11,2,3-Trichloropropane



ND 0.505.0 ug/L 06/23/20 08:29 11,2-Dibromo-3-Chloropropane

ND 0.252.0 ug/L 06/23/20 08:29 11,2-Dibromoethane (EDB)











ND 0.252.0 ug/L 06/23/20 08:29 1Benzene

ND 0.255.0 ug/L 06/23/20 08:29 1Bromobenzene

ND 0.255.0 ug/L 06/23/20 08:29 1Bromochloromethane

ND 0.252.0 ug/L 06/23/20 08:29 1Bromodichloromethane

ND 0.405.0 ug/L 06/23/20 08:29 1Bromoform

ND 0.255.0 ug/L 06/23/20 08:29 1Bromomethane

ND 0.251.0 ug/L 06/23/20 08:29 1Carbon tetrachloride

ND 0.252.0 ug/L 06/23/20 08:29 1Chlorobenzene

ND 0.405.0 ug/L 06/23/20 08:29 1Chloroethane

ND 0.252.0 ug/L 06/23/20 08:29 1Chloroform

ND 0.255.0 ug/L 06/23/20 08:29 1Chloromethane

ND 0.252.0 ug/L 06/23/20 08:29 1cis-1,2-Dichloroethene

ND 0.252.0 ug/L 06/23/20 08:29 1cis-1,3-Dichloropropene

ND 0.252.0 ug/L 06/23/20 08:29 1Dibromochloromethane

ND 0.252.0 ug/L 06/23/20 08:29 1Dibromomethane

ND 0.405.0 ug/L 06/23/20 08:29 1Dichlorodifluoromethane

ND 1.02.0 ug/L 06/23/20 08:29 1Dimethyl disulfide

ND 0.252.0 ug/L 06/23/20 08:29 1Ethylbenzene

ND 0.255.0 ug/L 06/23/20 08:29 1Hexachlorobutadiene

ND 0.252.0 ug/L 06/23/20 08:29 1Isopropylbenzene

ND 0.502.0 ug/L 06/23/20 08:29 1m,p-Xylene

ND 0.882.0 ug/L 06/23/20 08:29 1Methylene Chloride

ND 0.405.0 ug/L 06/23/20 08:29 1Naphthalene

ND 0.405.0 ug/L 06/23/20 08:29 1n-Butylbenzene

ND 0.252.0 ug/L 06/23/20 08:29 1N-Propylbenzene

ND 0.252.0 ug/L 06/23/20 08:29 1o-Xylene

ND 0.252.0 ug/L 06/23/20 08:29 1p-Isopropyltoluene

ND 0.255.0 ug/L 06/23/20 08:29 1sec-Butylbenzene

ND 0.252.0 ug/L 06/23/20 08:29 1Styrene

ND 0.255.0 ug/L 06/23/20 08:29 1tert-Butylbenzene


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RL MDL

Tetrachloroethene ND 2.0 0.25 ug/L 06/23/20 08:29 1

MB MB


ND 0.252.0 ug/L 06/23/20 08:29 1Toluene

ND 0.252.0 ug/L 06/23/20 08:29 1trans-1,2-Dichloroethene

ND 0.252.0 ug/L 06/23/20 08:29 1trans-1,3-Dichloropropene

ND 0.252.0 ug/L 06/23/20 08:29 1Trichloroethene

ND 0.255.0 ug/L 06/23/20 08:29 1Trichlorofluoromethane

ND 0.255.0 ug/L 06/23/20 08:29 1Vinyl chloride


MB MB

Surrogate Dil FacPrepared AnalyzedQualifier Limits%Recovery

109 06/23/20 08:29 1Dibromofluoromethane (Surr) 76 - 132

104 06/23/20 08:29 1Toluene-d8 (Surr) 80 - 128

113 06/23/20 08:29 11,2-Dichloroethane-d4 (Surr) 70 - 130



Analyte

LCS LCS


Spike

Added

%Rec.

Limits





1,1-Dichloroethene 25.0 27.0 ug/L 108 70 - 130

1,1-Dichloropropene 25.0 28.7 ug/L 115 70 - 130


1,2,3-Trichloropropane 25.0 24.3 ug/L 97 63 - 130



1,2-Dibromo-3-Chloropropane 25.0 22.9 ug/L 91 52 - 140

1,2-Dibromoethane (EDB) 25.0 23.8 ug/L 95 70 - 130











Benzene 25.0 25.5 ug/L 102 68 - 130

Bromobenzene 25.0 23.9 ug/L 96 70 - 130

Bromochloromethane 25.0 25.8 ug/L 103 70 - 130

Bromodichloromethane 25.0 26.6 ug/L 106 70 - 132

Bromoform 25.0 23.0 ug/L 92 60 - 148

Bromomethane 25.0 29.0 ug/L 116 64 - 139


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Carbon tetrachloride 25.0 28.4 ug/L 113 60 - 150

Analyte

LCS LCS


Spike

Added

%Rec.

Limits

Chlorobenzene 25.0 23.8 ug/L 95 70 - 130

Chloroethane 25.0 26.7 ug/L 107 64 - 135

Chloroform 25.0 25.9 ug/L 104 70 - 130

Chloromethane 25.0 31.3 ug/L 125 47 - 140

cis-1,2-Dichloroethene 25.0 25.9 ug/L 104 70 - 133

cis-1,3-Dichloropropene 25.0 25.0 ug/L 100 70 - 133

Dibromochloromethane 25.0 24.4 ug/L 98 69 - 145

Dibromomethane 25.0 25.6 ug/L 102 70 - 130

Dichlorodifluoromethane 25.0 41.0 * ug/L 164 29 - 150

Ethylbenzene 25.0 24.1 ug/L 96 70 - 130

Hexachlorobutadiene 25.0 26.8 ug/L 107 10 - 150

Isopropylbenzene 25.0 25.0 ug/L 100 70 - 136

m,p-Xylene 25.0 25.3 ug/L 101 70 - 130

Methylene Chloride 25.0 25.0 ug/L 100 52 - 130

Naphthalene 25.0 21.4 ug/L 86 60 - 140

n-Butylbenzene 25.0 25.6 ug/L 102 65 - 150

N-Propylbenzene 25.0 24.9 ug/L 99 67 - 139

o-Xylene 25.0 25.0 ug/L 100 70 - 130

p-Isopropyltoluene 25.0 24.6 ug/L 99 70 - 132

sec-Butylbenzene 25.0 24.8 ug/L 99 70 - 138

Styrene 25.0 23.4 ug/L 94 70 - 134

tert-Butylbenzene 25.0 25.4 ug/L 102 70 - 130

Tetrachloroethene 25.0 28.6 ug/L 114 70 - 130

Toluene 25.0 23.8 ug/L 95 70 - 130

trans-1,2-Dichloroethene 25.0 27.3 ug/L 109 70 - 130

trans-1,3-Dichloropropene 25.0 24.8 ug/L 99 70 - 132

Trichloroethene 25.0 24.9 ug/L 100 70 - 130

Trichlorofluoromethane 25.0 31.2 ug/L 125 60 - 150

Vinyl chloride 25.0 27.3 ug/L 109 59 - 133


Surrogate

100

LCS LCS







Analyte

MS MS


Spike

Added

Sample

Result

Sample

Qualifier

%Rec.

Limits





1,1-Dichloroethene ND 10.0 10.8 ug/L 108 70 - 130


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1,1-Dichloropropene ND 10.0 10.9 ug/L 109 64 - 130

Analyte

MS MS


Spike

Added

Sample

Result

Sample

Qualifier

%Rec.

Limits


1,2,3-Trichloropropane ND 10.0 10.7 ug/L 107 60 - 130



1,2-Dibromo-3-Chloropropane ND 10.0 11.1 ug/L 111 48 - 140

1,2-Dibromoethane (EDB) ND 10.0 10.8 ug/L 108 70 - 131











Benzene ND 10.0 10.7 ug/L 107 66 - 130

Bromobenzene ND 10.0 10.3 ug/L 103 70 - 130

Bromochloromethane ND 10.0 11.3 ug/L 113 70 - 130

Bromodichloromethane ND 10.0 11.3 ug/L 113 70 - 138

Bromoform ND 10.0 10.3 ug/L 103 59 - 150

Bromomethane ND 10.0 11.5 ug/L 115 62 - 131

Carbon tetrachloride ND 10.0 10.8 ug/L 108 60 - 150

Chlorobenzene ND 10.0 10.1 ug/L 101 70 - 130

Chloroethane ND 10.0 10.1 ug/L 101 68 - 130

Chloroform ND 10.0 11.3 ug/L 113 70 - 130

Chloromethane ND 10.0 12.3 ug/L 123 39 - 144

cis-1,2-Dichloroethene ND 10.0 11.2 ug/L 112 70 - 130

cis-1,3-Dichloropropene ND 10.0 10.8 ug/L 108 70 - 133

Dibromochloromethane ND 10.0 10.7 ug/L 107 70 - 148

Dibromomethane ND 10.0 11.8 ug/L 118 70 - 130

Dichlorodifluoromethane ND F1 * 10.0 14.6 F1 ug/L 146 25 - 142

Ethylbenzene ND 10.0 10.1 ug/L 101 70 - 130

Hexachlorobutadiene ND 10.0 10.3 ug/L 103 10 - 150

Isopropylbenzene ND 10.0 10.2 ug/L 102 70 - 132

m,p-Xylene ND 10.0 10.5 ug/L 105 70 - 133

Methylene Chloride ND 10.0 11.3 ug/L 113 52 - 130

Naphthalene ND 10.0 10.0 ug/L 100 60 - 140

n-Butylbenzene ND 10.0 10.2 ug/L 102 61 - 149

N-Propylbenzene ND 10.0 9.96 ug/L 100 66 - 135

o-Xylene ND 10.0 10.3 ug/L 103 70 - 133

p-Isopropyltoluene ND 10.0 9.96 ug/L 100 70 - 130

sec-Butylbenzene ND 10.0 10.0 ug/L 100 67 - 134

Styrene ND 10.0 10.2 ug/L 102 29 - 150

tert-Butylbenzene ND 10.0 9.83 ug/L 98 70 - 130

Tetrachloroethene 0.29 J 10.0 12.2 ug/L 119 70 - 137

Toluene ND 10.0 10.5 ug/L 105 70 - 130

trans-1,2-Dichloroethene ND 10.0 10.4 ug/L 104 70 - 130


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trans-1,3-Dichloropropene ND 10.0 11.2 ug/L 112 70 - 138

Analyte

MS MS


Spike

Added

Sample

Result

Sample

Qualifier

%Rec.

Limits

Trichloroethene 1.7 J 10.0 11.5 ug/L 98 70 - 130

Trichlorofluoromethane ND 10.0 11.8 ug/L 118 60 - 150

Vinyl chloride ND 10.0 10.5 ug/L 105 50 - 137


Surrogate

101

MS MS







Analyte

MSD MSD


Spike

Added

Sample

Result

Sample

Qualifier

%Rec.

Limits LimitRPD

RPD





1,1-Dichloroethene ND 10.0 10.4 ug/L 104 70 - 130 3 20

1,1-Dichloropropene ND 10.0 11.0 ug/L 110 64 - 130 1 20


1,2,3-Trichloropropane ND 10.0 10.6 ug/L 106 60 - 130 1 30



1,2-Dibromo-3-Chloropropane ND 10.0 11.1 ug/L 111 48 - 140 0 30

1,2-Dibromoethane (EDB) ND 10.0 11.1 ug/L 111 70 - 131 3 25











Benzene ND 10.0 10.3 ug/L 103 66 - 130 4 20

Bromobenzene ND 10.0 9.95 ug/L 99 70 - 130 4 20

Bromochloromethane ND 10.0 10.8 ug/L 108 70 - 130 5 25

Bromodichloromethane ND 10.0 11.3 ug/L 113 70 - 138 1 20

Bromoform ND 10.0 10.7 ug/L 107 59 - 150 4 25

Bromomethane ND 10.0 11.4 ug/L 114 62 - 131 1 25

Carbon tetrachloride ND 10.0 10.7 ug/L 107 60 - 150 0 25

Chlorobenzene ND 10.0 10.5 ug/L 105 70 - 130 4 20

Chloroethane ND 10.0 10.4 ug/L 104 68 - 130 3 25


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Chloroform ND 10.0 10.8 ug/L 108 70 - 130 5 20

Analyte

MSD MSD


Spike

Added

Sample

Result

Sample

Qualifier

%Rec.

Limits LimitRPD

RPD

Chloromethane ND 10.0 12.6 ug/L 126 39 - 144 2 25

cis-1,2-Dichloroethene ND 10.0 9.84 ug/L 98 70 - 130 13 20

cis-1,3-Dichloropropene ND 10.0 10.8 ug/L 108 70 - 133 1 20

Dibromochloromethane ND 10.0 10.9 ug/L 109 70 - 148 2 25

Dibromomethane ND 10.0 12.2 ug/L 122 70 - 130 3 25

Dichlorodifluoromethane ND F1 * 10.0 15.0 F1 ug/L 150 25 - 142 3 30

Ethylbenzene ND 10.0 10.4 ug/L 104 70 - 130 3 20

Hexachlorobutadiene ND 10.0 10.9 ug/L 109 10 - 150 6 20

Isopropylbenzene ND 10.0 10.7 ug/L 107 70 - 132 5 20

m,p-Xylene ND 10.0 10.2 ug/L 102 70 - 133 2 25

Methylene Chloride ND 10.0 10.3 ug/L 103 52 - 130 10 20

Naphthalene ND 10.0 9.76 ug/L 98 60 - 140 3 30

n-Butylbenzene ND 10.0 10.3 ug/L 103 61 - 149 0 20

N-Propylbenzene ND 10.0 10.2 ug/L 102 66 - 135 2 20

o-Xylene ND 10.0 10.4 ug/L 104 70 - 133 1 20

p-Isopropyltoluene ND 10.0 9.45 ug/L 94 70 - 130 5 20

sec-Butylbenzene ND 10.0 10.1 ug/L 101 67 - 134 0 20

Styrene ND 10.0 9.99 ug/L 100 29 - 150 2 35

tert-Butylbenzene ND 10.0 10.1 ug/L 101 70 - 130 2 20

Tetrachloroethene 0.29 J 10.0 11.6 ug/L 113 70 - 137 5 20

Toluene ND 10.0 10.2 ug/L 102 70 - 130 4 20

trans-1,2-Dichloroethene ND 10.0 10.5 ug/L 105 70 - 130 1 20

trans-1,3-Dichloropropene ND 10.0 10.9 ug/L 109 70 - 138 2 25

Trichloroethene 1.7 J 10.0 11.4 ug/L 97 70 - 130 1 20

Trichlorofluoromethane ND 10.0 11.9 ug/L 119 60 - 150 1 25

Vinyl chloride ND 10.0 10.8 ug/L 108 50 - 137 3 30


Surrogate

102

MSD MSD





Method: 8270C - Semivolatile Organic Compounds (GC/MS)

Client Sample ID: Method BlankLab Sample ID: MB 440-613491/1-AMatrix: Water Prep Type: Total/NAAnalysis Batch: 613826 Prep Batch: 613491

RL MDL


4,4'-Dichlorobenzil

ND 10 4.5 ug/L 06/19/20 08:13 06/22/20 17:02 1

MB MB


2,4,6-Tribromophenol (Surr) 95 40 - 120 06/22/20 17:02 1

MB MB

Surrogate

06/19/20 08:13

Dil FacPrepared AnalyzedQualifier Limits%Recovery

84 06/19/20 08:13 06/22/20 17:02 12-Fluorobiphenyl 50 - 120

81 06/19/20 08:13 06/22/20 17:02 12-Fluorophenol (Surr) 30 - 120


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Method: 8270C - Semivolatile Organic Compounds (GC/MS) (Continued)


Nitrobenzene-d5 (Surr) 85 45 - 120 06/22/20 17:02 1

MB MB

Surrogate

06/19/20 08:13


89 06/19/20 08:13 06/22/20 17:02 1Phenol-d6 (Surr) 35 - 120

96 06/19/20 08:13 06/22/20 17:02 1Terphenyl-d14 (Surr) 10 - 150


RL MDL


4,4'-Dichlorobenzil

ND 10 4.5 ug/L 06/19/20 08:13 06/23/20 10:49 1

MB MB


2,4,6-Tribromophenol (Surr) 99 40 - 120 06/23/20 10:49 1

MB MB

Surrogate

06/19/20 08:13


84 06/19/20 08:13 06/23/20 10:49 12-Fluorobiphenyl 50 - 120

72 06/19/20 08:13 06/23/20 10:49 12-Fluorophenol (Surr) 30 - 120

82 06/19/20 08:13 06/23/20 10:49 1Nitrobenzene-d5 (Surr) 45 - 120

72 06/19/20 08:13 06/23/20 10:49 1Phenol-d6 (Surr) 35 - 120

89 06/19/20 08:13 06/23/20 10:49 1Terphenyl-d14 (Surr) 10 - 150

Client Sample ID: Lab Control SampleLab Sample ID: LCS 440-613491/2-AMatrix: Water Prep Type: Total/NAAnalysis Batch: 613826 Prep Batch: 613491


4,4'-Dichlorobenzil

100 110 ug/L 110 78 - 135

Analyte

LCS LCS


Spike

Added

%Rec.

Limits

2,4,6-Tribromophenol (Surr) 40 - 120

Surrogate

93

LCS LCS


802-Fluorobiphenyl 50 - 120

702-Fluorophenol (Surr) 30 - 120

91Nitrobenzene-d5 (Surr) 45 - 120

79Phenol-d6 (Surr) 35 - 120

87Terphenyl-d14 (Surr) 10 - 150

Client Sample ID: Lab Control Sample DupLab Sample ID: LCSD 440-613491/3-AMatrix: Water Prep Type: Total/NAAnalysis Batch: 613826 Prep Batch: 613491


4,4'-Dichlorobenzil

100 112 ug/L 112 78 - 135 2 35

Analyte

LCSD LCSD


Spike

Added

%Rec.

Limits LimitRPD

RPD

2,4,6-Tribromophenol (Surr) 40 - 120

Surrogate

91

LCSD LCSD


812-Fluorobiphenyl 50 - 120

772-Fluorophenol (Surr) 30 - 120


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Method: 8270C - Semivolatile Organic Compounds (GC/MS) (Continued)


Nitrobenzene-d5 (Surr) 45 - 120

Surrogate

85

LCSD LCSD


85Phenol-d6 (Surr) 35 - 120

89Terphenyl-d14 (Surr) 10 - 150

Method: 8081A - Organochlorine Pesticides (GC)


RL MDL

2,4'-DDD ND 0.10 0.0025 ug/L 06/17/20 05:00 06/18/20 14:17 1

MB MB


ND 0.00250.10 ug/L 06/17/20 05:00 06/18/20 14:17 12,4'-DDE

ND 0.00250.10 ug/L 06/17/20 05:00 06/18/20 14:17 12,4'-DDT

ND 0.00250.10 ug/L 06/17/20 05:00 06/18/20 14:17 14,4'-DDD

ND 0.00250.10 ug/L 06/17/20 05:00 06/18/20 14:17 14,4'-DDE

ND 0.00250.10 ug/L 06/17/20 05:00 06/18/20 14:17 14,4'-DDT

ND 0.00150.0050 ug/L 06/17/20 05:00 06/18/20 14:17 1Aldrin

ND 0.00250.0050 ug/L 06/17/20 05:00 06/18/20 14:17 1alpha-BHC

ND 0.00400.010 ug/L 06/17/20 05:00 06/18/20 14:17 1beta-BHC

ND 0.0800.10 ug/L 06/17/20 05:00 06/18/20 14:17 1Chlordane

ND 0.00350.20 ug/L 06/17/20 05:00 06/18/20 14:17 1delta-BHC

ND 0.00200.0050 ug/L 06/17/20 05:00 06/18/20 14:17 1Dieldrin

ND 0.00300.10 ug/L 06/17/20 05:00 06/18/20 14:17 1Endosulfan I

ND 0.00200.10 ug/L 06/17/20 05:00 06/18/20 14:17 1Endosulfan II

ND 0.00300.20 ug/L 06/17/20 05:00 06/18/20 14:17 1Endosulfan sulfate

ND 0.00200.10 ug/L 06/17/20 05:00 06/18/20 14:17 1Endrin

ND 0.00200.10 ug/L 06/17/20 05:00 06/18/20 14:17 1Endrin aldehyde

ND 0.00700.10 ug/L 06/17/20 05:00 06/18/20 14:17 1Endrin ketone

ND 0.00300.10 ug/L 06/17/20 05:00 06/18/20 14:17 1gamma-BHC (Lindane)

ND 0.00300.010 ug/L 06/17/20 05:00 06/18/20 14:17 1Heptachlor

ND 0.00250.0050 ug/L 06/17/20 05:00 06/18/20 14:17 1Heptachlor epoxide

ND 0.00350.10 ug/L 06/17/20 05:00 06/18/20 14:17 1Methoxychlor

ND 0.255.0 ug/L 06/17/20 05:00 06/18/20 14:17 1Toxaphene

DCB Decachlorobiphenyl (Surr) 63 28 - 108 06/18/20 14:17 1

MB MB

Surrogate

06/17/20 05:00


57 06/17/20 05:00 06/18/20 14:17 1Tetrachloro-m-xylene 10 - 123


2,4'-DDD 0.400 0.308 ug/L 77 10 - 150

Analyte

LCS LCS


Spike

Added

%Rec.

Limits

2,4'-DDE 0.400 0.332 ug/L 83 10 - 150

2,4'-DDT 0.400 0.368 ug/L 92 10 - 150

4,4'-DDD 0.400 0.334 ug/L 83 50 - 128


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Method: 8081A - Organochlorine Pesticides (GC) (Continued)


4,4'-DDE 0.400 0.263 ug/L 66 49 - 121

Analyte

LCS LCS


Spike

Added

%Rec.

Limits

4,4'-DDT 0.400 0.363 ug/L 91 41 - 140

Aldrin 0.400 0.279 ug/L 70 37 - 115

alpha-BHC 0.400 0.284 ug/L 71 44 - 115

beta-BHC 0.400 0.300 ug/L 75 46 - 121

delta-BHC 0.400 0.301 ug/L 75 32 - 129

Dieldrin 0.400 0.311 ug/L 78 39 - 126

Endosulfan I 0.400 0.305 ug/L 76 47 - 115

Endosulfan II 0.400 0.301 ug/L 75 47 - 120

Endosulfan sulfate 0.400 0.358 ug/L 89 48 - 126

Endrin 0.400 0.311 ug/L 78 43 - 127

Endrin aldehyde 0.400 0.297 ug/L 74 43 - 120

Endrin ketone 0.400 0.308 ug/L 77 47 - 123

gamma-BHC (Lindane) 0.400 0.287 ug/L 72 45 - 116

Heptachlor 0.400 0.276 ug/L 69 37 - 115

Heptachlor epoxide 0.400 0.302 ug/L 76 41 - 129

Methoxychlor 0.400 0.372 ug/L 93 44 - 141

DCB Decachlorobiphenyl (Surr) 28 - 108

Surrogate

81

LCS LCS


71Tetrachloro-m-xylene 10 - 123


2,4'-DDD 0.400 0.318 ug/L 80 10 - 150 3 26

Analyte

LCSD LCSD


Spike

Added

%Rec.

Limits LimitRPD

RPD

2,4'-DDE 0.400 0.340 ug/L 85 10 - 150 3 35

2,4'-DDT 0.400 0.378 ug/L 95 10 - 150 3 35

4,4'-DDD 0.400 0.344 ug/L 86 50 - 128 3 26

4,4'-DDE 0.400 0.274 ug/L 68 49 - 121 4 22

4,4'-DDT 0.400 0.372 ug/L 93 41 - 140 2 20

Aldrin 0.400 0.279 ug/L 70 37 - 115 0 24

alpha-BHC 0.400 0.289 ug/L 72 44 - 115 2 26

beta-BHC 0.400 0.308 ug/L 77 46 - 121 2 27

delta-BHC 0.400 0.308 ug/L 77 32 - 129 2 35

Dieldrin 0.400 0.321 ug/L 80 39 - 126 3 35

Endosulfan I 0.400 0.312 ug/L 78 47 - 115 2 27

Endosulfan II 0.400 0.309 ug/L 77 47 - 120 3 29

Endosulfan sulfate 0.400 0.368 ug/L 92 48 - 126 3 26

Endrin 0.400 0.320 ug/L 80 43 - 127 3 35

Endrin aldehyde 0.400 0.309 ug/L 77 43 - 120 4 35

Endrin ketone 0.400 0.318 ug/L 80 47 - 123 3 27

gamma-BHC (Lindane) 0.400 0.293 ug/L 73 45 - 116 2 28

Heptachlor 0.400 0.281 ug/L 70 37 - 115 2 35

Heptachlor epoxide 0.400 0.311 ug/L 78 41 - 129 3 35

Methoxychlor 0.400 0.386 ug/L 96 44 - 141 4 35


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Method: 8081A - Organochlorine Pesticides (GC) (Continued)


DCB Decachlorobiphenyl (Surr) 28 - 108

Surrogate

80

LCSD LCSD


69Tetrachloro-m-xylene 10 - 123


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QC Association SummaryJob ID: 440-267502-1Client: de maximis, inc.SDG: Henderson, NVProject/Site: Montrose

GC/MS VOA

Analysis Batch: 613704

Lab Sample ID Client Sample ID Prep Type Matrix Method Prep Batch

Water 8260B440-267502-1 MW-1-20200615 Total/NA




Water 8260B440-267502-4 - DL MW-4-20200615 Total/NA

Water 8260BMB 440-613704/4 Method Blank Total/NA

Water 8260BLCS 440-613704/1002 Lab Control Sample Total/NA

Water 8260B440-267349-A-18 MS Matrix Spike Total/NA

Water 8260B440-267349-A-18 MSD Matrix Spike Duplicate Total/NA



Water 8260B440-267502-5 TB-20200615 Total/NA

Water 8260B440-267502-6 PL-510-20200615 Total/NA

Water 8260BMB 440-613896/4 Method Blank Total/NA

Water 8260BLCS 440-613896/1002 Lab Control Sample Total/NA

Water 8260B440-267641-A-1 MS Matrix Spike Total/NA

Water 8260B440-267641-A-1 MSD Matrix Spike Duplicate Total/NA

GC/MS Semi VOA

Prep Batch: 613491


Water 3520C440-267502-1 MW-1-20200615 Total/NA




Water 3520CMB 440-613491/1-A Method Blank Total/NA

Water 3520CLCS 440-613491/2-A Lab Control Sample Total/NA

Water 3520CLCSD 440-613491/3-A Lab Control Sample Dup Total/NA



Water 8270C 613491440-267502-2 MW-2-20200615 Total/NA



Water 8270C 613491MB 440-613491/1-A Method Blank Total/NA

Water 8270C 613491LCS 440-613491/2-A Lab Control Sample Total/NA

Water 8270C 613491LCSD 440-613491/3-A Lab Control Sample Dup Total/NA




Water 8270C 613491MB 440-613491/1-A Method Blank Total/NA

GC Semi VOA

Prep Batch: 613067






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QC Association SummaryJob ID: 440-267502-1Client: de maximis, inc.SDG: Henderson, NVProject/Site: Montrose

GC Semi VOA (Continued)

Prep Batch: 613067 (Continued)



Water 3510CMB 440-613067/1-A Method Blank Total/NA

Water 3510CLCS 440-613067/2-A Lab Control Sample Total/NA

Water 3510CLCSD 440-613067/3-A Lab Control Sample Dup Total/NA



Water 8081A 613067440-267502-1 MW-1-20200615 Total/NA






Water 8081A 613067MB 440-613067/1-A Method Blank Total/NA

Water 8081A 613067LCS 440-613067/2-A Lab Control Sample Total/NA

Water 8081A 613067LCSD 440-613067/3-A Lab Control Sample Dup Total/NA


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Definitions/GlossaryJob ID: 440-267502-1Client: de maximis, inc.SDG: Henderson, NVProject/Site: Montrose

Qualifiers

GC/MS VOAQualifier Description

* LCS or LCSD is outside acceptance limits.

Qualifier

F1 MS and/or MSD recovery exceeds control limits.

J Result is less than the RL but greater than or equal to the MDL and the concentration is an approximate value.

GC Semi VOAQualifier Description

J Result is less than the RL but greater than or equal to the MDL and the concentration is an approximate value.

Qualifier

p The %RPD between the primary and confirmation column/detector is >40%. The lower value has been reported.

GlossaryThese commonly used abbreviations may or may not be present in this report.

¤ Listed under the "D" column to designate that the result is reported on a dry weight basis

Abbreviation

%R Percent Recovery

CFL Contains Free Liquid

CFU Colony Forming Unit

CNF Contains No Free Liquid

DER Duplicate Error Ratio (normalized absolute difference)

Dil Fac Dilution Factor

DL Detection Limit (DoD/DOE)

DL, RA, RE, IN Indicates a Dilution, Re-analysis, Re-extraction, or additional Initial metals/anion analysis of the sample

DLC Decision Level Concentration (Radiochemistry)

EDL Estimated Detection Limit (Dioxin)

LOD Limit of Detection (DoD/DOE)

LOQ Limit of Quantitation (DoD/DOE)

MCL EPA recommended "Maximum Contaminant Level"

MDA Minimum Detectable Activity (Radiochemistry)

MDC Minimum Detectable Concentration (Radiochemistry)

MDL Method Detection Limit

ML Minimum Level (Dioxin)

MPN Most Probable Number

MQL Method Quantitation Limit

NC Not Calculated

ND Not Detected at the reporting limit (or MDL or EDL if shown)

NEG Negative / Absent

POS Positive / Present

PQL Practical Quantitation Limit

PRES Presumptive

QC Quality Control

RER Relative Error Ratio (Radiochemistry)

RL Reporting Limit or Requested Limit (Radiochemistry)

RPD Relative Percent Difference, a measure of the relative difference between two points

TEF Toxicity Equivalent Factor (Dioxin)

TEQ Toxicity Equivalent Quotient (Dioxin)

TNTC Too Numerous To Count


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Accreditation/Certification SummaryClient: de maximis, inc. Job ID: 440-267502-1Project/Site: Montrose SDG: Henderson, NV

Laboratory: Eurofins Calscience IrvineUnless otherwise noted, all analytes for this laboratory were covered under each accreditation/certification below.

Authority Program Identification Number Expiration Date

Nevada CA015312020-9State 07-31-20

The following analytes are included in this report, but the laboratory is not certified by the governing authority. This list may include analytes for which

the agency does not offer certification.

Analysis Method Prep Method Matrix Analyte

8081A 3510C Water 2,4'-DDD

8081A 3510C Water 2,4'-DDE

8081A 3510C Water 2,4'-DDT

8081A 3510C Water 4,4'-DDD

8081A 3510C Water 4,4'-DDE

8081A 3510C Water 4,4'-DDT

8081A 3510C Water Aldrin

8081A 3510C Water alpha-BHC

8081A 3510C Water beta-BHC

8081A 3510C Water Chlordane

8081A 3510C Water delta-BHC

8081A 3510C Water Dieldrin

8081A 3510C Water Endosulfan I

8081A 3510C Water Endosulfan II

8081A 3510C Water Endosulfan sulfate

8081A 3510C Water Endrin

8081A 3510C Water Endrin aldehyde

8081A 3510C Water Endrin ketone

8081A 3510C Water gamma-BHC (Lindane)

8081A 3510C Water Heptachlor

8081A 3510C Water Heptachlor epoxide

8081A 3510C Water Methoxychlor

8081A 3510C Water Toxaphene

8260B Water Dimethyl disulfide

8270C 3520C Water 2,2'-Dichlorobenzil & 4,4'-Dichlorobenzil


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Login Sample Receipt Checklist

Client: de maximis, inc. Job Number: 440-267502-1

SDG Number: Henderson, NV

Login Number: 267502

Question Answer Comment

Creator: Bonta, Lucia F

List Source: Eurofins Irvine

List Number: 1

TrueRadioactivity wasn't checked or is </= background as measured by a survey meter.

TrueThe cooler's custody seal, if present, is intact.

N/ASample custody seals, if present, are intact. Not Present

TrueThe cooler or samples do not appear to have been compromised or tampered with.

TrueSamples were received on ice.

TrueCooler Temperature is acceptable.

TrueCooler Temperature is recorded.

TrueCOC is present.

TrueCOC is filled out in ink and legible.

TrueCOC is filled out with all pertinent information.

TrueIs the Field Sampler's name present on COC?

TrueThere are no discrepancies between the containers received and the COC.

TrueSamples are received within Holding Time (excluding tests with immediate HTs)

TrueSample containers have legible labels.

TrueContainers are not broken or leaking.

TrueSample collection date/times are provided.

TrueAppropriate sample containers are used.

TrueSample bottles are completely filled.

N/ASample Preservation Verified.

TrueThere is sufficient vol. for all requested analyses, incl. any requested MS/MSDs

TrueContainers requiring zero headspace have no headspace or bubble is <6mm (1/4").

TrueMultiphasic samples are not present.

TrueSamples do not require splitting or compositing.

N/AResidual Chlorine Checked.

Eurofins IrvinePage 45 of 45 6/25/2020

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Appendix D

Low Flow Purge Sampling Forms

Documents

-CLOSURE MONITORING REPORT