The following discussion and analysis of our financial condition and results of
operations should be read in conjunction with our historical audited and
unaudited consolidated financial statements and related notes and other
information included elsewhere in this filing and our other filings with the
SEC, including our unaudited condensed consolidated financial statements and the
accompanying notes as of and for the three and six months ended June 30, 2021
and 2020 included in Part I, Item 1. "Financial Statements" in this Quarterly
Report on Form 10-Q. This discussion contains forward-looking statements that
involve risks and uncertainties. Our actual results could differ materially from
such forward-looking statements. Factors that could cause or contribute to those
differences include, but are not limited to, those identified below and those
discussed in the section entitled "Forward-Looking Statements", and elsewhere in
this filing and our other filings with the SEC.

Overview



Since our inception in 2012, our mission has been to help clients and
communities meet their environmental goals and needs. Today, we have emerged as
one of the fastest growing companies in a highly fragmented and growing $1.25
trillion global environmental industry.

Our Segments

We provide environmental services to our clients through three business segments-Assessment, Permitting and Response, Measurement and Analysis and Remediation and Reuse.

Assessment, Permitting and Response



Through our Assessment, Permitting and Response segment, we provide scientific
advisory and consulting services to support environmental assessments,
environmental emergency response, and environmental audits and permits for
current operations, facility upgrades, new projects, decommissioning projects
and development projects. Our technical advisory and consulting offerings
include regulatory compliance support and planning, environmental, ecosystem and
toxicological assessments and support during responses to environmental
disruption. We help clients navigate regulations at the local, state, provincial
and federal levels. In addition to environmental toxicology, and given our
expertise in helping businesses plan for and respond to disruptions, our
scientists and response teams have helped clients navigate their preparation for
and response to the COVID-19 pandemic.

Measurement and Analysis



Through our Measurement and Analysis segment, our highly credentialed teams test
and analyze air, water and soil to determine concentrations of contaminants,
including emerging contaminants such as PFAS, as well as determine the
toxicological impact of contaminants on flora, fauna and human health. Our
offerings include source and ambient air testing and monitoring, leak detection
and advanced analytical laboratory services such as air, storm water, wastewater
and drinking water analysis.

Remediation and Reuse

Through our Remediation and Reuse segment, we provide clients with engineering,
design, implementation and operations and maintenance services, primarily to
treat contaminated water, remove contaminants from soil or create biogas from
waste. We do not own the properties or facilities at which we implement these
projects or the underlying liabilities, nor do we own material amounts of the
equipment used in projects; instead, we assist our clients in designing
solutions, managing projects and mitigating their environmental risks and
liabilities.

These operating segments have been structured and organized to align with how we
view and manage the business with the full lifecycle of our clients' targeted
environmental concerns and needs in mind. Within each segment, we cover similar
service offerings, regulatory frameworks, internal operating structures and
client types. Corporate activities not directly related to segment performance,
including general corporate expenses, interest and taxes, are reported
separately. For more information on each of our operating segments, see Item 1.
"Business" in the 2020 Form 10-K.

COVID-19



We are closely monitoring the impact of the COVID-19 pandemic on our business,
including the impact on our customers, employees and suppliers. While COVID-19
has not had a material adverse effect on our reported results, we have
experienced some changes to our business operations. The changes were primarily
composed of client postponement of on-site environmental

                                       33

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compliance testing, delays in project start dates particularly within our
Remediation and Reuse segment, and postponement or reformatting of scientific
presentations and sales visits. We have also had small numbers of employees
either exposed to or contract COVID-19. Exposed employees have been asked to
quarantine per Company protocols. To date, COVID-19 related quarantines have not
had a material adverse effect on our reported results. In the second quarter of
2020 we instituted temporary cost mitigation measures such as reducing
non-billable time for a subset of our impacted workforce. Some of these cost
mitigation measures were reversed during the first quarter of 2021, with the
remaining measures reversed in the second quarter of 2021. Our businesses
exposed to commercial food waste and non-specialized municipal water engineering
projects also saw more significant disruptions and, as a result, in the first
quarter of 2020 we exited those service lines as described further below. On the
other hand, we have seen benefits from COVID-19 given client demand for CTEH's
toxicology and response services, which represented a meaningful revenue stream
in the three and six months ended June 30, 2021 and the three months ended June
30, 2020, and that, once the pandemic subsides, we may not be able to replace in
future periods. Although many parts of our business saw some impact from
COVID-19, in the aggregate, our overall business benefitted from COVID-19 during
the three and six months ended June 30, 2021 and the three months ended June 30,
2020, primarily as a result of COVID-19 response work performed by CTEH.

COVID-19 has had an impact on our historical seasonality trends given the
various government stay at home or business closure orders staring in the second
quarter of 2020. We have not experienced a significant slowdown in cash
collections, and as a result cash flow from operations has not been materially
adversely impacted. In addition, in the second quarter of 2021 we entered into a
2021 Credit Facility, replacing our 2020 Credit Facility, and as a result,
increased borrowing capacity. We expect our sources of liquidity to be
sufficient for our operating needs for the next twelve months. See "-Liquidity
and Capital Resources."

On March 27, 2020, the Coronavirus Aid, Relief, and Economic Security Act, or
the CARES Act, was enacted. The CARES Act includes several significant
provisions for corporations, including those pertaining to net operating losses,
interest deductions and payroll tax benefits. We utilized certain of these
provisions in 2020, including the deferral of the employer side social security
payments for payroll for the eligible portion of the year. In total, we deferred
approximately $5.0 million of 2020 payments to 2021 and 2022.

It is difficult to predict the future impact COVID-19 may have on our business,
results of operations, financial position, or cash flows. The extent to which we
may be impacted will depend largely on future and rapidly evolving developments,
including new information on the severity of new strains, the roll-out and
long-term efficacy of vaccines, and actions by various government authorities to
contain the pandemic and mitigate its impact. We intend to closely monitor the
impact of COVID-19 on our business and will respond as we believe is
appropriate.

Key Factors that Affect Our Business and Our Results

Our operating results and financial performance are influenced by a variety of internal and external trends and other factors. Some of the more important factors are discussed briefly below.

Acquisitions



We have been, and expect to continue to be, an acquisitive company. Acquisitions
have expanded our environmental service capabilities across all three segments,
our access to technology, as well as our geographic reach in the United States,
Canada and Australia. The table below sets forth the number of acquisitions
completed, revenues generated by and the percentage of total revenues
attributable to those acquisitions completed during the three and six months
ended June 30, 2021 and 2020:



                                       Three Months Ended June 30,                Six Months Ended June 30,
                                      2021                     2020                2021               2020
Acquisitions completed                         1                         1                2                   1
Revenues attributable to                                            14,631                               14,631
acquisitions                                 457                                      7,831
Percentage of revenues                       0.3 %                    19.8 %            2.9 %              10.9 %

Revenues from acquired companies exclude intercompany revenues from revenue synergies realized between business lines within operating segments, as these are eliminated at the consolidated segment and Company level. We expect our revenue growth to continue to be driven in significant part by acquisitions.



As a result of our acquisitions, goodwill and other intangible assets represent
a significant proportion of our total assets, and amortization of intangible
assets has historically been a significant expense. Our historical financial
statements also include other acquisition-related costs, including costs
relating to external legal support, diligence and valuation services and other
transaction and integration-related matters. In addition, in any year gains and
losses from changes in the fair value of earn-out related contingent
consideration related to acquisitions could be significant. The amount of each
for the three and six months ended June 30, was:

                                       34

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                                    Three Months Ended June 30,            Six Months Ended June 30,
(in thousands)                        2021                2020             2021                2020
Amortization expense             $        8,407       $      7,717     $      17,002       $      13,326
Acquisition-related costs                   506              2,454               743               3,761
Fair value changes in business
acquisitions                             12,971              3,983            24,035               3,983
  contingent consideration



We expect that amortization of identifiable intangible assets and other acquisition-related costs, assuming we continue to acquire, will continue to be significant.





Additionally, we made a $50.0 million earn-out payment in April 2021 (50.0% of
which was paid in the form of shares of our common stock) and may make a future
payment of up to $30.0 million in earn-out payments in 2022 in connection with
our CTEH acquisition. In connection with our MSE and Vista acquisitions, we may
make up to $7.2 million in aggregate purchase price true up and earn-out
payments in 2022 and 2023. See Note 7 to our unaudited condensed consolidated
financial statements included in Part I, Item 1. "Financial Statements."

Organic Growth



We have grown organically and expect to continue to do so. We define organic
growth as the change in revenues excluding revenues from acquisitions for the
first twelve months following the date of acquisition and excluding revenues
from businesses disposed of or discontinued. As a result of the significance of
the CTEH acquisition to Montrose, and the potential annual volatility in CTEH's
revenues, we may also disclose organic growth without the annual organic revenue
growth of CTEH. We expect to continue to disclose organic revenue growth with
and without CTEH, typically on an annual basis. Management uses organic growth
as one of the means by which it assesses our results of operations. Organic
growth is not, however, a measure of revenue growth calculated in accordance
with U.S. generally accepted accounting principles, or GAAP, and should be
considered in conjunction with revenue growth calculated in accordance with
GAAP. We have grown organically and expect to continue to do so.

Discontinued Service Lines



Periodically, or when circumstances warrant, we evaluate the performance of our
business services to ensure that performance and outlook are consistent with
expectations. During the first quarter of 2020, as part of this evaluation, we
determined to scale back operations of our environmental lab in Berkeley,
California, and to exit our non-specialized municipal water engineering service
line and our food-waste biogas engineering service line, collectively, the
Discontinued Service Lines. The factors underlying these decisions were
accelerated and amplified by the COVID-19 pandemic, which for example, has made
the collection of commercial food waste used in biodigesters less consistent and
delayed the approval or initiation of certain projects dependent on municipal or
state funding. As a part of discontinuing these service lines, a process which
was completed in the second quarter of 2020, we eliminated select personnel and,
in the first quarter of 2020, booked an additional bad debt reserve related to
the increased uncertainty around the ability to collect on receivables related
to these service lines. Revenues from our non-specialized municipal water
engineering service line and our food-waste biogas engineering, which are
included in the results of our Remediation and Reuse segment, were zero in the
three and six months ended June 30, 2021 and $0.4 million and $1.3 million in
the three and six months ended June 30, 2020, respectively. Revenues from our
Berkeley lab, which are included in the results of our Measurement and Analysis
segment, were zero during the three and six months ended June 30, 2021 and $0.9
million and $2.5 million in the three and six months ended June 30, 2020,
respectively. We no longer generate any revenues from the Discontinued Service
Lines.

Revenue Mix

Our segments generate different levels of profitability and, accordingly, shifts
in the mix of revenues between segments can impact our consolidated reported net
income, operating margin, Adjusted EBITDA and Adjusted EBITDA margin from
quarter to quarter and year to year. Inter-company revenues between business
lines within segments have been eliminated. See Note 20 to our unaudited
condensed consolidated financial statements included in Part 1, Item 1
"Financial Statements."

Financing Costs



Financing costs, relating primarily to interest expense on our debt, continue to
be a significant component of our results of operations. We incurred interest
expense of $6.8 million and $9.5 million during the three and six months ended
June 30, 2021, respectively, and $5.3 million and $7.9 million during the three
and six months ended June 30, 2020, respectively.

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On April 13, 2020, we entered into the 2020 Credit Facility providing for a
$225.0 million credit facility comprised of a $175.0 million term loan and a
$50.0 million revolving credit facility, and used the proceeds therefrom to
repay in full all amounts outstanding under our prior senior secured credit
facility. We incurred debt extinguishment costs of $1.4 million in connection
with this refinancing transaction. Effective October 6, 2020, the Company
amended its 2020 Credit Facility to provide for a reduction on the applicable
interest rate on the term loan from LIBOR plus 5.0% with a 1.0% LIBOR floor to
LIBOR plus 4.5% with a 1.0% LIBOR floor. The revolver interest rate remained
unchanged.

On April 27, 2021, we entered into the 2021 Credit Facility and repaid all
amounts outstanding under the 2020 Credit Facility. The 2021 Credit Facility
consists of a $175.0 million term loan and a $125.0 million revolving credit
facility. The interest rate on the 2021 Credit Facility varies depending on
leverage, with a minimum of LIBOR plus 1.5% and a maximum of LIBOR plus 2.5%. We
incurred debt extinguishment costs of $3.9 million in connection with this
refinancing transaction.

As a result of the lower interest rates under the 2021 Credit Facility, we expect interest expense to be lower for the remainder of 2021 as compared to 2020 periods despite higher outstanding debt balances. We expect interest expense to remain a significant cost as we continue to leverage our credit facility to support our operations and future acquisitions.

See Note 13 to our unaudited condensed consolidated financial statements included in Part 1, Item 1 "Financial Statements" and "Liquidity and Capital Resources."

Corporate and Operational Infrastructure Investments



Our historical operating results reflect the impact of our ongoing investments
in our corporate infrastructure to support our growth. We have made and expect
to continue to make investments in our business platform that we believe have
laid the foundation for continued growth. Investments in logistics, quality,
risk management, sales and marketing, safety, human resources, research and
development, finance and information technology and other areas enable us to
support continued growth. These investments have allowed us to improve our
operating margins.

Seasonality



Because demand for environmental services is not driven by specific or
predictable patterns in one or more fiscal quarters, our business is better
assessed based on yearly results. In addition, our operating results experience
some quarterly variability. Excluding the impact of revenues and earnings from
new acquisitions, and the temporary impact of COVID, we typically generate
slightly lower revenues and lower earnings in the first and fourth quarters and
higher overall revenues and earnings in the second and third quarters.
Historically, quarterly variability has been driven by weather patterns, which
generally impact our field-based teams' ability to operate in the winter months.
As we continue to grow and expand into new geographies and service lines,
quarterly variability may deviate from historical trends.

Earnings Volatility



The acquisition of CTEH exposes us to potentially significant revenue and
earnings fluctuations tied both to the timing of large environmental emergency
response projects following an incident or natural disaster, and more recently,
the benefit from COVID related work. We expect change in demand for COVID-19
related response services provided by CTEH towards the end of 2021 and into
2022. As a result, we may have experienced revenues and earnings in the second
half of 2020 and the first half of 2021 that are not indicative of future
results.

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Results of Operations



Three Months Ended June 30, 2021 Compared to the Three Months Ended June 30,
2020



                                                             For the Three Months
                                                                Ended June 30,
(in thousands, except per share and percentage data)        2021            

2020


Statements of operations data:
Revenues                                                $     136,224      $     73,766
Cost of revenues (exclusive of depreciation and
amortization)                                                  92,104       

45,889


Selling, general and administrative expense                    27,366       

19,318


Initial public offering expense                                     -       

-

Fair value changes in business acquisitions


  contingent consideration                                     12,971       

3,983


Depreciation and amortization                                  10,905             9,784
Loss from operations                                    $      (7,122 )    $     (5,208 )
Other (expense) income                                           (819 )          21,933
Interest expense, net                                          (6,798 )          (5,260 )
(Loss) income before income taxes                             (14,739 )          11,465
Income tax expense (benefit)                                     (256 )          (1,759 )
Net (loss) income                                       $     (14,483 )    $     13,224
Accretion of Series A-1 redeemable preferred stock                  -            (5,644 )
Series A-2 dividend payment                                    (4,100 )     

-

Net (loss) income attributable to common stockholders $ (18,583 ) $ 7,580 Weighted average number of shares - basic

                      26,056       

10,649


(Loss) income per share - basic                         $       (0.71 )    $       0.71
Weighted average number of shares - diluted                    26,056       

19,139


(Loss) income per share - diluted                       $       (0.71 )    $       0.40
Other financial data:
Operating margin(1)                                              (5.2 )%           (7.1 )%
Adjusted EBITDA(2)                                      $      20,963      $     13,895
Adjusted EBITDA margin(2)                                        15.4 %            18.8 %




   (4)  Operating margin represents loss from operations as a percentage of
        revenues.


(5) Non-GAAP measure. See "-Non-GAAP Financial Information" for a discussion

of non-GAAP measures and a reconciliation thereof to the most directly


        comparable GAAP measure.




Revenues

For the three months ended June 30, 2021, we had revenues of $136.2 million, an
increase of $62.4 million, or 84.6% over the three months ended June 30, 2020.
Excluding revenues from Discontinued Service Lines of zero and $1.3 million in
the three months ended June 30, 2021 and June 30, 2020, respectively, revenues
increased $63.7 million or 87.9%. The period over period increase in revenues
was driven by a full three-month period including the results of CTEH, which was
acquired in the second quarter of 2020, organic growth in all three of our
segments, and acquisitions completed subsequent to the quarter ended June
30,2020, which contributed $3.9 million. As was the case in the prior year, all
segments continue to be impacted by COVID-19 in 2021, however, in the current
year, COVID-19 related project delays and other impacts were more than offset by
COVID-19 response work in our Assessment, Permitting and Response segment from
the acquisition of CTEH. Revenue from CTEH was $65.9 million in the three months
ended June 30, 2021 compared to $14.6 million in the three months ended June 30,
2020. Revenue by segment and as a percentage of total revenues was as follows:



                                                                Three Months Ended
                                                                     June 30,
                                                2021                                         2020
(revenue in thousands)          Revenues          % of Total Revenues        Revenues          % of Total Revenues
Assessment, Permitting and    $     70,705                 51.9     %      $     18,631                 25.3     %
  Response
Measurement and Analysis            39,117                 28.7                  37,036                 50.2
Remediation and Reuse               26,402                 19.4                  18,099                 24.5




                                       37

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See "-Segment Results of Operations" below.

Cost of Revenues

Cost of revenues consists of all direct costs required to provide services, including fixed and variable direct labor costs, equipment rental and other outside services, field and lab supplies, vehicle costs and travel-related expenses. Variable costs of revenues generally follow the same seasonality trends as revenue, while fixed costs tend to change primarily as a result of acquisitions.



For the three months ended June 30, 2021, cost of revenues was $92.1 million or
67.6% of revenues, and was comprised of direct labor of $36.2 million, outside
services (including contracted labor, laboratory, shipping and freight and other
outside services) of $41.9 million, field supplies, testing supplies and
equipment rental of $7.1 million, project-related travel expenses of $3.7
million and other direct costs of $3.2 million.

For the three months ended June 30, 2020, cost of revenues was $45.9 million or
62.2% of revenues, and was comprised of direct labor of $30.2 million, outside
services (including construction, laboratory, shipping and freight and other
outside services) of $6.5 million, field supplies, testing supplies and
equipment rental of $5.1 million, project-related travel expenses of $2.2
million and other direct costs of $1.9 million.

For the three months ended June 30, 2021, cost of revenues as a percentage of
revenue increased 5.4% from the three months ended June 30, 2020, as a result of
significantly higher outside service costs driven by external lab expenses to
support the increase in CTEH's COVID-19 revenues. The increase was partially
offset by lower labor as a percentage of revenue primarily attributable to a
shift in roles and responsibilities of certain employees from providing direct
field support to providing more specialized, multi-location overhead support
functions (such as accounting, HR and management) as result of acquisitions and
growth in our business. These changes in employee roles resulted in a decrease
in labor costs recorded as cost of revenues and a corresponding increase in
labor costs recorded as selling, general and administrative expense in the
current quarter.

Selling, General and Administrative Expense

Selling, general and administrative expense consists of general corporate overhead, including executive, legal, finance, safety, risk management, human resource, marketing and information technology related costs, as well as indirect operational costs of labor, rent, insurance and stock-based compensation.



For the three months ended June 30, 2021, selling, general and administrative
expense was $27.4 million, an increase of $8.1 million or 41.7% versus the three
months ended June 30, 2020, of which $1.4 million was from selling, general and
administrative expense pertaining to companies we acquired subsequent to the
second quarter of 2020, an increase in public company related costs of $0.7
million, as well as the impact of the shift of employee roles and
responsibilities as described above, and an increase in investments in corporate
infrastructure (primarily sales and marketing, finance, administrative, IT,
legal and human resources).

For the three months ended June 30, 2021, selling, general and administrative
expense was comprised of indirect labor of $13.3 million, facilities costs of
$3.5 million, stock-based compensation of $2.1 million, acquisition-related
costs of $1.0 million, bad debt expense of $0.1 million, and other costs
(including software, travel, insurance, legal, consulting and audit services) of
$7.4 million.

For the three months ended June 30, 2020, selling, general and administrative
expense was $19.3 million, and was comprised of indirect labor of $9.0 million,
facilities costs of $2.9 million, stock-based compensation of $0.7 million,
acquisition-related costs of $2.5 million, bad debt expense of $0.1 million, and
other costs (including software, travel, insurance, legal, consulting and audit
services) of $4.1 million.

Fair Value Changes in Business Acquisitions Contingent Consideration



For the three months ended June 30, 2021, fair value changes in business
acquisitions contingent consideration were $13.0 million versus $4.0 million for
the three months ended June 30, 2020. The increase was primarily driven by fair
value adjustments to contingent consideration associated with making payments in
respect of the 2020 period for CTEH's earn-out. See "Key Factors that Affect Our
Business and Our Results-Acquisitions" and Note 7 to our unaudited condensed
consolidated financial statements included in Part I, Item 1. "Financial
Statements.".

Depreciation and Amortization



Depreciation and amortization expense for the three months ended June 30, 2021,
was $10.9 million and was comprised of amortization of finite lived intangibles
of $8.4 million, arising as a result of our acquisition activity, and
depreciation of property and equipment of $2.5 million.

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Depreciation and amortization expense for the three months ended June 30, 2020,
was $9.8 million and was comprised of amortization of finite lived intangibles
of $7.8 million and depreciation of property and equipment of $2.0 million.

The increase in both depreciation and amortization for the three months ended June 30, 2021 versus the three months ended June 30, 2020, was primarily a result of acquisitions.

Other (Expense) Income



Other expense for the three months ended June 30, 2021 of $0.8 million was
driven by fair value adjustments related to the Series A-2 preferred stock
conversion option. Other income of $21.9 million for the three months ended June
30, 2020 was driven primarily by fair value adjustments related to the Series
A-1 preferred stock contingent put option. See Notes 16 and 17 to our unaudited
condensed consolidated financial statements included in Part 1, Item 1.
"Financial Statements."

Interest Expense, Net



Interest expense, net incurred in the three months ended June 30, 2021, was
$6.8 million, compared to $5.3 million for the three months ended June 30, 2020.
The increase in interest expense was driven by an increase in the write off of
deferred debt issuance costs and higher outstanding debt balances, partially
offset by lower average interest rates under the 2021 Credit Facility. Interest
expense in the three months ended June 30, 2021 includes $3.1 million from the
write off of deferred debt issuance costs related to the repayment of our 2020
Credit Facility, whereas interest expense in the three months ended June 30,
2020 includes $1.4 million expense from both payments made and the write off of
deferred debt issuance costs, related to the repayment of the Prior Credit
Facility. See "Key Factors that Affect Our Business and Our Results-Financing
Costs" and Note 13 to our unaudited condensed consolidated financial statements
included in Part I, Item 1. "Financial Statements."

Income Taxes Expense (Benefit)



Income tax expense was not material during the three months ended June 30, 2021,
compared to an income tax benefit of $1.8 million for the three months ended
June 30, 2020.



Six Months Ended June 30, 2021 Compared to the Six Months Ended June 30, 2020

                                                              For the Six Months
                                                                Ended June 30,
(in thousands, except per share and percentage data)        2021            

2020


Statements of operations data:
Revenues                                                $    270,041      $ 

134,797


Cost of revenues (exclusive of depreciation and
amortization)                                                187,420        

90,287


Selling, general and administrative expense                   52,366        

39,837


Initial public offering expense                                    -        

531

Fair value changes in business acquisitions


  contingent consideration                                    24,035        

3,983


Depreciation and amortization                                 21,674            17,344
Loss from operations                                    $    (15,454 )    $    (17,185 )
Other expense                                                 (1,393 )          (7,897 )
Interest expense, net                                         (9,486 )          (7,853 )
Loss before income taxes                                     (26,333 )         (32,935 )
Income tax expense (benefit)                                    (254 )          (4,911 )
Net loss                                                $    (26,079 )    $    (28,024 )
Accretion of Series A-1 redeemable preferred stock                 -           (11,059 )
Series A-2 dividend payment                                   (8,200 )      

-


Net loss attributable to common stockholders            $    (34,279 )    $    (39,083 )
Weighted average number of shares- basic and diluted          25,586        

9,718


Loss per share- basic and diluted                       $      (1.34 )    $      (4.02 )
Other financial data:
Operating margin(1)                                             (5.7 )%          (12.7 )%
Adjusted EBITDA(2)                                      $     37,762      $     19,448
Adjusted EBITDA margin(2)                                       14.0 %            14.4 %




   (1)  Operating margin represents loss from operations as a percentage of
        revenues.


                                       39

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(2) Non-GAAP measure. See "-Non-GAAP Financial Information" for a discussion

of non-GAAP measures and a reconciliation thereof to the most directly


        comparable GAAP measure.




Revenues

For the six months ended June 30, 2021, we had revenues of $270.0 million, an
increase of $135.2 million, or 100.3% over the six months ended June 30, 2020.
Excluding revenues from Discontinued Service Lines of zero and $3.8 million in
the six months ended June 30, 2021 and June 30, 2020, respectively, revenues
increased $139.0 million or 106.1%. The period over period increase in revenues
was driven by a full six-month period including the results of CTEH, which was
acquired in the second quarter of 2020, and acquisitions completed after the
quarter ended June 30, 2020, which contributed $7.8 million in revenues during
the six months ended June 30, 2021, and organic growth, including significant
organic growth from CTEH. As was the case in the prior year, all segments
continue to be impacted by COVID-19 in 2021, however, in the current year,
COVID-19 related project delays and other impacts were more than offset by
COVID-19 response work in our Assessment, Permitting and Response segment from
the acquisition of CTEH. Revenues from CTEH were $136.5 million in the six
months ended June 30, 2021 as compared to $14.6 million in the six months ended
June 30,2020 (all of which was in the second quarter of 2020). Organic growth
for the six months ended June 30, 2021 was 46.7% including CTEH, and 8.5%
excluding CTEH. Revenue by segment and as a percentage of total revenues was as
follows:



                                                            Six Months Ended June 30,
                                                2021                                         2020
(revenue in thousands)          Revenues          % of Total Revenues        Revenues          % of Total Revenues
Assessment, Permitting and    $    145,967                 54.1     %      $     23,161                 17.2     %
  Response
Measurement and Analysis            72,557                 26.9                  73,476                 54.5
Remediation and Reuse               51,517                 19.1                  38,160                 28.3

See "-Segment Results of Operations" below.

Cost of Revenues



For the six months ended June 30, 2021, cost of revenues was $187.4 million or
69.4% of revenues, and was comprised of direct labor of $72.3 million, outside
services (including contracted labor, laboratory, shipping and freight and other
outside services) of $82.9 million, field supplies, testing supplies and
equipment rental of $18.2 million, project-related travel expenses of $8.8
million and other direct costs of $5.2 million.

For the six months ended June 30, 2020, cost of revenues was $90.3 million or
67.0% of revenues, and was comprised of direct labor of $57.2 million, outside
services (including construction, laboratory, shipping and freight and other
outside services) of $15.7 million, field supplies, testing supplies and
equipment rental of $9.3 million, project-related travel expenses of $3.8
million and other direct costs of $4.3 million.

For the six months ended June 30, 2021, cost of revenues as a percentage of
revenue increased 2.4% from the six months ended June 30, 2020, as a result of
significantly higher outside service costs driven by external lab expenses to
support the increase in CTEH's COVID-19 revenues. The increase was partially
offset by lower labor as a percentage of revenue primarily attributable to a
shift in roles and responsibilities of certain employees from providing direct
field support to providing more specialized, multi-location overhead support
functions (such as accounting, HR and management) as result of acquisitions and
growth in our business. These changes in employee roles resulted in a decrease
in labor costs recorded as cost of revenues and a corresponding increase in
labor costs recorded as selling, general and administrative expense in the
current year.

Selling, General and Administrative Expense



For the six months ended June 30, 2021, selling, general and administrative
expense was $52.4 million, an increase of $12.6 million or 31.7% versus the six
months ended June 30, 2020, of which $7.1 million was from selling, general and
administrative expense pertaining to companies we acquired at the end of, and
subsequent to the second quarter of 2020, an increase in public company related
costs of $1.7 million, and increase in stock-based compensation expense of $1.8
million as well as the impact of the shift of employee roles and
responsibilities as described above, and an increase in investments in corporate
infrastructure (primarily sales and marketing, finance, administrative, IT,
legal and human resources). These increases were partially offset by a decrease
in bad debt of $5.7 million, primarily related to the Discontinued Service Lines
and a decrease in acquisition related costs of $1.3 million.

For the six months ended June 30, 2021, selling, general and administrative
expense was comprised of indirect labor of $27.2 million, facilities costs of
$7.0 million, stock-based compensation of $3.3 million, acquisition-related
costs of $1.2 million, bad debt expense of $0.6 million, and other costs
(including software, travel, insurance, legal, consulting and audit services) of
$13.1 million.

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For the six months ended June 30, 2020, selling, general and administrative
expense was $39.8 million, and was comprised of indirect labor of $15.0 million,
facilities costs of $5.8 million, stock-based compensation of $1.5 million,
acquisition-related costs of $2.5 million, bad debt expense of $6.3 million, and
other costs (including software, travel, insurance, legal, consulting and audit
services) of $8.6 million.

Initial Public Offering Expense

Initial public offering expense for the six months ended June 30, 2021 and June 30, 2020, was zero and $0.5 million, respectively, and represented expenses incurred to prepare for the initial public offering.

Fair Value Changes in Business Acquisitions Contingent Consideration



For the six months ended June 30, 2021, fair value changes in business
acquisitions contingent consideration were $24.0 million versus $4.0 million for
the six months ended June 30, 2020. The increase was primarily driven by fair
value adjustments to contingent consideration associated with making payments in
respect of the 2020 period for CTEH's earn-out. See "Key Factors that Affect Our
Business and Our Results-Acquisitions" and Note 7 to our unaudited condensed
consolidated financial statements included in Part I, Item 1. "Financial
Statements.".

Depreciation and Amortization



Depreciation and amortization expense for the six months ended June 30, 2021,
was $21.7 million and was comprised of amortization of finite lived intangibles
of $17.0 million, arising as a result of our acquisition activity, and
depreciation of property and equipment of $4.7 million.

Depreciation and amortization expense for the six months ended June 30, 2020,
was $17.3 million and was comprised of amortization of finite lived intangibles
of $13.3 million and depreciation of property and equipment of $4.0 million.

The increase in both depreciation and amortization for the six months ended June
30, 2021 versus the six months ended June 30, 2020, was primarily a result of
acquisitions.

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Other Expense



Other expense for the six months ended June 30, 2021 of $1.4 million was driven
by fair value adjustments related to the Series A-2 preferred stock conversion
option. Other expense of $7.9 million for the six months ended June 30, 2020 was
driven primarily by fair value adjustments related to the Series A-1 preferred
stock contingent put option. See Notes 16 and 17 to our unaudited condensed
consolidated financial statements included in Part 1, Item 1. "Financial
Statements."

Interest Expense, Net



Interest expense, net incurred in the six months ended June 30, 2021, was
$9.5 million, compared to $7.9 million for the six months ended June 30, 2020.
The increase in interest expense was driven by an increase in write-off of
deferred debt issuance costs and higher outstanding debt balances, partially
offset by lower average interest rates under the 2021 Credit Facility. Interest
expense in the six months ended June 30, 2021 and June 30, 2020 also includes
$3.1 million from the write off of deferred debt issuance costs related to the
repayment of our 2020 Credit Facility in April, 2021, whereas interest expense
in the six months ended June 30, 2020 includes $1.4 million expense from both
payments made and the write off of deferred debt issuance costs related to the
repayment of the Prior Credit Facility. See Note 13 to our unaudited condensed
consolidated financial statements included in Part I, Item 1. "Financial
Statements."

Income Taxes Expense (Benefit)



Income tax expense was not material during the six months ended June 30, 2021,
compared to an income tax benefit of $4.9 million for the six months ended June
30, 2020.

Segment Results of Operations

Three Months Ended June 30, 2021 Compared to the Three Months Ended June 30,
2020



                                                                      Three Months Ended June 30,
                                                         2021                                             2020
                                                                       Segment                                          Segment
                                                       Segment        Adjusted                          Segment        Adjusted
                                       Segment        Adjusted         EBITDA           Segment        Adjusted         EBITDA
(in thousands)                         Revenues       EBITDA(1)      

Margin(2) Revenues EBITDA(1) Margin(2) Assessment, Permitting and Response $ 70,705 $ 14,856


21.0   %   $   18,631     $     4,989            26.8   %
Measurement and Analysis                  39,117           9,491            24.3           37,036          11,615            31.4
Remediation and Reuse                     26,402           4,309            16.3           18,099           2,375            13.1
Total Operating Segments              $  136,224     $    28,656            21.0   %   $   73,766     $    18,979            25.7   %
Corporate and Other                                       (7,693 )           n/a                           (5,084 )           n/a



(1) For purposes of evaluating segment profit, the Company's chief operating

decision maker reviews Segment Adjusted EBITDA as a basis for making the

decisions to allocate resources and assess performance. See Note 20 to our

unaudited condensed consolidated financial statements included in Part I,

Item 1. "Financial Statements."

(2) Represents Segment Adjusted EBITDA as a percentage of revenues.


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Revenues

Assessment, Permitting and Response segment revenues for the three months ended
June 30, 2021 were $70.7 million, compared to $18.6 million for the three months
ended June 30, 2020. The increase was driven by the performance of CTEH in the
second quarter of 2020, which benefited from greater COVID-19 related response
work, as well as organic growth in our environmental advisory services. CTEH
revenues were $65.9 million in the three months ended June 30, 2021 compared to
$14.6 million in the three months ended June 30, 2020.

Measurement and Analysis segment revenues for the three months ended June 30,
2021 were $39.1 million, an increase of $2.1 million or 5.7% compared to
revenues for the three months ended June 30, 2020 of $37.0 million, driven
primarily by organic growth in all of our environmental testing services and
revenues of $0.5 million from the acquisition of Vista in June 2021. The
increase was partially offset by a decline in revenues from Discontinued Service
Lines. Revenues from Discontinued Service Lines in the Measurement and Analysis
segment were zero and $0.9 million for the three months ended June 30, 2021 and
June 30, 2020, respectively. Excluding revenues from Discontinued Service Lines,
revenues increased $3.0 million or 8.3%.

Remediation and Reuse segment revenues for the three months ended June 30, 2021
were $26.4 million, an increase of $8.3 million or 45.9% compared to revenues
for the three months ended June 30, 2020 of $18.1 million, primarily driven by
growing demand for PFAS, remediation and waste-to-energy services and includes
$3.4 million from the acquisition of MSE, which closed on January 4, 2021.
Revenues from Discontinued Service Lines were $0.4 million for the three months
ended June 30, 2020. Excluding revenues from Discontinued Service Lines,
revenues increased $8.7 million or 49.2%.

Segment Adjusted EBITDA



Assessment, Permitting and Response Segment Adjusted EBITDA was $14.9 million
for the three months ended June 30, 2021, compared to $5.0 million for the three
months ended June 30, 2020. For the three months ended June 30, 2021 and June
30, 2020, Segment Adjusted EBITDA margin was 21.0% and 26.8%, respectively. The
increase in Segment Adjusted EBITDA was a result of increased revenues. The
decline in Segment Adjusted EBITDA margin is as a result of lower margin COVID
response work performed by CTEH in the current year.

Measurement and Analysis Segment Adjusted EBITDA for the three months ended June
30, 2021 was $9.5 million, a decrease of $2.1 million compared to Segment
Adjusted EBITDA for the three months ended June 30, 2020 of $11.6 million. For
the three months ended June 30, 2021 Segment Adjusted EBITDA margin was 24.3%
compared to 31.4% for the three months ended June 30, 2020. The decline in
Segment Adjusted EBITDA and Segment Adjusted EBITDA margin was primarily a
result of business mix and the reversal of cost mitigation measures taken into
the prior year in response to COVID-19.

Remediation and Reuse Segment Adjusted EBITDA for the three months ended June
30, 2021 was $4.3 million, an increase of $1.9 million compared to Segment
Adjusted EBITDA for the three months ended June 30, 2020 of $2.4 million. For
the three months ended June 30, 2021 Segment Adjusted EBITDA margin was 16.3%
compared to 13.1% in the three months ended June 30, 2020. The increase in both
Segment Adjusted EBITDA and Segment Adjusted EBITDA margin was a result of
higher revenues.

Corporate and other costs were $7.7 million for the three months ended June 30,
2021 compared to $5.1 million for the three months ended June 30, 2020. The cost
increase was primarily driven by public company related costs, higher software
costs and higher sales and marketing costs.



Six Months Ended June 30, 2021 Compared to the Six Months Ended June 30, 2020



                                                                      Six Months Ended June 30,
                                                        2021                                            2020
                                                                      Segment                                         Segment
                                                      Segment        Adjusted                         Segment        Adjusted
                                       Segment        Adjusted        EBITDA           Segment        Adjusted        EBITDA
(in thousands)                         Revenues      EBITDA(1)      

Margin(2) Revenues EBITDA(1) Margin(2) Assessment, Permitting and Response $ 145,967 $ 30,660


21.0   %   $   23,161     $    6,431            27.8   %
Measurement and Analysis                  72,557         14,351            19.8           73,476         19,176            26.1
Remediation and Reuse                     51,517          6,790            13.2           38,160          4,481            11.7
Total Operating Segments              $  270,041     $   51,801            19.2   %   $  134,797     $   30,088            22.3   %
Corporate and Other                                     (14,039 )           n/a                         (10,640 )           n/a






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(1) For purposes of evaluating segment profit, the Company's chief operating

decision maker reviews Segment Adjusted EBITDA as a basis for making the

decisions to allocate resources and assess performance. See Note 20 to our

unaudited condensed consolidated financial statements included in Part I,

Item 1. "Financial Statements."

(2) Represents Segment Adjusted EBITDA as a percentage of revenues.

Revenues



Assessment, Permitting and Response segment revenues for the six months ended
June 30, 2021 were $146.0 million, compared to $23.2 million for the six months
ended June 30, 2020. The increase was driven by the acquisition of CTEH in the
second quarter of 2020, which expanded our product portfolio and our scientific
and technical advisory services footprint. CTEH benefited from greater COVID-19
related response work performed in the full 2021 period as compared to only a
portion of the prior year following the acquisition.

Measurement and Analysis segment revenues for the six months ended June 30, 2021
were $72.6 million, a decrease of $0.9 million or 1.2% compared to revenues for
the six months ended June 30, 2020 of $73.5 million. The decrease was driven by
a decline in revenues from Discontinued Service Lines, partially offset by
organic growth and revenues of $0.5 million from the acquisition of Vista.
Revenues from Discontinued Service Lines in the Measurement and Analysis segment
were zero and $2.5 million for the six months ended June 30, 2021 and June 30,
2020, respectively. Excluding revenues from Discontinued Service Lines, revenues
increased $1.6 million or 2.3%.

Remediation and Reuse segment revenues for the six months ended June 30, 2021
were $51.5 million, an increase of $13.3 million or 34.8% compared to revenues
for the six months ended June 30, 2020 of $38.2 million. This increase was
primarily driven by organic growth and $7.4 million from the acquisition of MSE,
which closed on January 4, 2021, partially offset by the loss of revenues from
the Discontinued Service Lines. Revenues from Discontinued Service Lines were
$1.3 million for the six months ended June 30, 2020. Excluding revenues from
Discontinued Service Lines, revenues increased $14.6 million or 39.6%.

Segment Adjusted EBITDA



Assessment, Permitting and Response Segment Adjusted EBITDA was $30.7 million
for the six months ended June 30, 2021, compared to $6.4 million for the six
months ended June 30, 2020. For the six months ended June 30, 2021 and June 30,
2020, Segment Adjusted EBITDA margin was 21.0% and 27.8%, respectively. The
increase in Segment Adjusted EBITDA was primarily a result of the acquisition of
CTEH in April of 2020 and higher revenues in the second quarter of 2021. The
decline in Segment Adjusted EBITDA margin is as a result of performing more
lower margin COVID response work performed by CTEH.

Measurement and Analysis Segment Adjusted EBITDA for the six months ended June
30, 2021 was $14.4 million, a decrease of $4.8 million compared to Segment
Adjusted EBITDA for the six months ended June 30, 2020 of $19.2 million. For the
six months ended June 30, 2021 Segment Adjusted EBITDA margin was 19.8% compared
to 26.1% for the six months ended June 30, 2020. The decline in Segment Adjusted
EBITDA was primarily a result of business mix and the reversal of cost
mitigation measures taken in the prior year in response to COVID-19.

Remediation and Reuse Segment Adjusted EBITDA for the six months ended June 30,
2021 was $6.8 million, an increase of $2.3 million compared to Segment Adjusted
EBITDA for the six months ended June 30, 2020 of $4.5 million. For the six
months ended June 30, 2021 Segment Adjusted EBITDA margin was 13.2% compared to
11.7% in the six months ended June 30, 2020. The increase in both Segment
Adjusted EBITDA and Segment Adjusted EBITDA margin was primarily a result of
higher revenues.

Corporate and other costs were $14.0 million for the six months ended June 30,
2021 compared to $10.6 million for the six months ended June 30, 2020. The cost
increase was primarily driven by public company related costs, higher software
costs, higher sales and marketing costs and continued investment in corporate
support functions to support higher revenues, partially offset by a decrease in
bad debt expense of $5.7 million.

Liquidity and Capital Resources



Liquidity describes the ability of a company to generate sufficient cash flows
to meet the cash requirements of its business operations, including working
capital needs, debt service, acquisitions, other commitments and contractual
obligations. We consider liquidity in terms of cash flows from operations and
other sources, including availability under our credit facility, and their
sufficiency to fund our operating and investing activities.

Our principal sources of liquidity have been borrowings under our current and prior credit facilities, other borrowing arrangements, proceeds from the issuance of preferred stock and cash generated by operating activities. Historically, we have financed


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our operations and acquisitions from a combination of cash generated from
operations, periodic borrowings under senior secured credit facilities, other
prior secured and unsecured borrowings and proceeds from the issuance of common
and preferred stock. Our primary cash needs are for day to day operations, to
fund working capital requirements, to fund our acquisition strategy and any
related cash earn-out obligations, to pay interest and principal on our
indebtedness and dividends on our Series A-2 preferred stock, and to make
capital expenditures. Additionally, the CTEH acquisition agreement includes an
earn-out provision that provides for the payment of contingent consideration
based on CTEH's 2021 results in an aggregate amount not to exceed $30.0 million,
with the earn-out payment equal to a specified multiple of CTEH's EBITDA for
2021 in excess of a specified target. Any payment in respect of 2021 will be
payable in cash. See Note 7 to our unaudited condensed consolidated financial
statements included in Part 1, Item 1. "Financial Statements."

We expect to continue to fund our liquidity requirements, including any cash
earn-out payments that may be required in connection with acquisitions, through
cash generated from operations and borrowings under our credit facility. We
believe these sources will be sufficient to fund our cash needs for the next
twelve months. See "-COVID-19" above for a discussion of the impact of the
pandemic on our liquidity.

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