Greetings, and welcome to the Clean Harbors Fourth Quarter 2020 Conference Call. At this time, all participants are in a listen-only mode. A brief question-and-answer session will follow the formal presentation. [Operator Instructions]. As a reminder, this conference is being recorded. It is now my pleasure to introduce your host, Michael McDonald, General Counsel for Clean Harbors. Thank you, sir. You may begin.

Thank you, Christine, and good morning, everyone. With me on today's call are Chairman, President and Chief Executive Officer, Alan S. Mckim; EVP and Chief Financial Officer, Mike Battles; and SVP of Investor Relations, Jim Buckley. Slides for today's call are posted on our website, and we invite you to follow along. Matters we are discussing today that are not historical facts are considered forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995. Participants are cautioned not to place undue reliance on these statements, which reflect management's opinions only as of today, February 24, 2021. Information on potential factors and risks that could affect our actual results of operations is included in our SEC filings. The company undertakes no obligation to revise or publicly release the results of any revision to the statements made in today's call other than through filings made concerning this reporting period. In addition, today's discussion will include references to non-GAAP measures. Clean Harbors believes that such information provides an additional measurement and consistent historical comparison of its performance. Reconciliations of non-GAAP measures to the most directly comparable GAAP measures are available in today's news release on our website and in the appendix of today's presentation. Now, I'd like to turn the call over to our CEO, Alan McKim. Alan?

Thanks, Michael. Good morning, everyone, and thank you for joining us. Starting on Slide 3. We concluded 2020 with a strong fourth quarter. Our Environmental Service segment outperformed our expectations, driven by a combination of factors, including the level of high-value waste in our disposal network, greater-than-expected COVID decontamination work and ongoing cost controls. Total fourth quarter revenues were in line with expectations as our Safety-Kleen business remained constrained by the effects of the pandemic. Adjusted EBITDA in Q4 increased to $136.1 million, which included $5.6 million in benefits from government programs, primarily from Canada. For the full year, adjusted EBITDA grew by 3% to $555.3 million, with annual margins growing to 17.7%. We generated record adjusted free cash flow of $265 million, a noteworthy accomplishment considering the economic disruption caused by the pandemic. Without question, the success we achieved in 2020 is a direct result of the dedication, flexibility and perseverance of our exceptional team. 2020 was a challenging year on many levels. And I'd like to publicly acknowledge all the employees across our organization, particularly those on the front lines for their outstanding work this past year. Thanks to you, we delivered essential products and services to our customers, despite facing many obstacles as the pandemic disrupted how we normally conduct business, and we did so safely all year. Turning to our segment results, beginning with Environmental Services on Slide 4. Revenue, while down year-over-year due to a market -- due to market conditions, was up on a sequential basis. Typically, Q4 is a seasonally weaker quarter for us, but the $18 million increase from Q3 is evidence that many of our markets are on the road to recovery. We also saw strong disposal and recycling volumes to close out the year. Adjusted EBITDA grew by 13% from…

Thank you, Alan, and good morning, everyone. Before I take you through the financials, let me comment briefly on our first ever sustainability report, which is available on the IR section of our website. We're proud of this document, which we created based on the sustainability accounting standard board framework. The document highlights the integral role that sustainability plays in our business decisions, as well as our environmental, social and government’s goals and benchmarks for 2030. The At a Glance page of the report shown on Slide 8 is an overview of some of the -- of our ESG benchmarks. I want to reiterate the point that Alan made about ESG and sustainability as foundational to our business. For many customers, we are their sustainability solution. When companies generate potentially harmful byproducts, they call Clean Harbors to safely remove and dispose of them. When they accidentally release chemicals into the environment, they call Clean Harbors to help clean it up. When they have waste oil, solvents, pressured metals or paint, they call a Clean Harbors to recycle. The new report also highlights the vital role our employees play in our performance. We strive to create a diverse and inclusive culture, one that values the unique background to perspectives and experiences of our people. We are committed to building a sustainable culture through training programs that enable our employees to have -- to enjoy long and successful careers at Clean Harbors. I encourage everyone to take a look through the report. It provides the detailed picture of how closely intertwined sustainability is with our entire organization, culture and business model. Now, let's turn to Slide 9 and our income statement. We ended 2020 on a high note with another strong financial performance. If you asked me back in April, when the…

[Operator Instructions] Our first question comes from the line of Tyler Brown with Raymond James.

Hey, Mike, appreciate all the guidance, but I do want to come back to the Q1 guide real quickly. So you mentioned it that Q1 was a really good quarter if I actually go back and look at my notes. But you also talked about these winter storms. Is there any way that you could kind of quantify maybe cost downtime? How much of a drag that's going to be?

Yes, Tyler, so we're just experiencing it right now, like the rest of our competitors are. And certainly has an impact in the Gulf and in the Texas. And at the end of the day, we think those plants have been down for a bit. I think it's going to come -- they're coming back online kind of today and tomorrow. I don't think it's a huge number. And also, as you know, Tyler, when these things happen, as you see in the paper and Bloomberg and other areas in pipes are cracking, and that's going to create spill opportunities for Clean Harbors to be there to help clean it up. And so I think that -- I don't think it's a huge number. I think it is a number certainly in Q1.

Okay. Interesting. So Alan, this is a bigger picture question. So I'm curious what you mean by when you say that you're seeing customers shifting towards greater environmental responsibility that aligns with your offering? That was something that you guys put in the press release. So is that a comment about captive incinerators maybe shutting down or plants being more stringent on their cleaning? I guess my big picture question here is in a clearly more ESG-focused world, do you think that, that translates into a better growth algorithm for Clean Harbors than maybe it has in the past?

I do. I think that -- I think people are becoming more and more aware of the environment. And certainly, you're hearing more about the warming of the planet and the effects of emissions. And I think when you look at our ESG report, it really is fantastic about how we are really a net benefiter from a greenhouse gas standpoint. And I think people will realize that whether it's outsourcing waste from their own captive or it's relying on us to recycle solvents and oils and so many other things, paint waste and the like. I think more and more of our -- I think our offerings would be prioritized or accepted because of that green nature of what we're doing.

Yes. No, that's very helpful. And then my last one, just quickly on CapEx. So I think you're calling it for -- I'm going to call it gross CapEx of $200 million. I look back over the last few years. And you exclude the headquarter buyout, it's been sitting around there. So as we look out, is that a pretty good placeholder? And then, Alan, you mentioned some of those, I think, internal growth opportunities, some of that spend. So how do we think about CapEx maybe on down the road, balancing some of those investments?

Tyler, I'll start with the first one, and Alan can talk about growth CapEx. So as we mentioned, our CapEx as a percentage of revenue has -- is one of the lower amongst the industry, and that stays there, 6%, 6.5%. I think there's a pretty low answer. I think as revenue grows, I think that will continue to make those CapEx investments. That excludes any type of large incinerator or any other types of big CapEx that's out there. If that were to happen, we certainly would call that out.

Our next question comes from the line of Noah Kaye with Oppenheimer.

I want to press a little bit on the capital allocation question here. I think clearly, you're extremely cash-rich, following open Tyler's point, there's a big CapEx spend envisioned for '21. Can you just give us a little bit more insight on how you stack everything up in terms of priorities here, repurchase, some color on the M&A pipeline? I mean, clearly, this isn't an optimal leverage position for the company at this point, looking at growth. So what do you want investors to expect that you're going to do over the next 12 months to address that?

Yes. I think our priority really is acquisitions. So I think the company has shown that it has done some really fantastic deals to be able to acquire companies, move them to our platform and really take advantage of the scale that we have. And I think that would be at the top of our list. I think over the past year, clearly, we have been impacted our ability to go through a normal process of due diligence and integration. And any -- the way that we typically would go about in M&A, it's really been disrupted because of the pandemic. And we really think that with this pandemic now getting behind us is I think many people feel like it is over the next few months, that we can be more aggressive. And I think that would be the key thing that you should be looking for with use of capital this year.

Okay. That's very helpful. And then can I push a little bit more on the question around ESG and related tailwinds. With respect to the closed-loop offering, looking at where Performance Plus and EcoPower are now and the opportunity for a recycled oil a greener product to get more penetration in the market. How big of a priority is that for you in this next 1 year or 2 to really push that direct sales percentage upwards? Do you see any traction happening because of some of these sustainability considerations? And again, what do you think investors should be expecting in terms of the trajectory for that direct sales to grow?

Yes. I think you'll continue to see us improve in that area. I think the Department of Energy finally came out with a study that we have been waiting for to be updated from 2006 or 2008, which was very favorable to the use of waste oil into recycled lubricants and base oil. And there were about 18 recommendations that come out of that DOE study that just come out last month. And our hope is that this administration will take a number of those recommendations and implement change, whether it be on incentives or getting government to be a larger buyer of these re-refined products. The government today is a large customer of ours, but predominantly army. And so many of the other agencies would be strong buyers of our re-refined products. So I think you're going to see a real favorable movement with this administration, taking some of those DOE suggestions and moving forward with them.

Our next question comes from the line of David Manthey with Baird.

So incinerator utilization used to hit the 90% range at higher periodically. But really, over the past 2 or more years, it's only done so in one quarter. And I'm wondering, is there any structural reason why this is? Or should we expect that to continue? Just any help on that? It seems like it used to be 90% pretty regularly. And now it's rarely so.

Dave, this is Mike. I'll take a shot at it. I mean, I think what's happened over the past couple of years is those kind of higher-margin streams have come into the network. And they are -- the reason why they're higher value, they're harder to destroy, and they do take some time in the kiln. And that has prevented us from doing other types of low-margin soil jobs. And overall, it's a good thing, frankly. And in my view, I've said time again in that mid-80s, high-80s, anywhere in that range is good. And then from there, it's just the mix of business that goes from there. Certainly, nothing structural. And we certainly we know where the money is being made and know where the value is and take very good care of those incinerators.

Okay. Yes. It sounds like a high-class problem. That's good. And second, in the release, you said with fewer waste oil outlets available, market rates charged for used motor oil remained high. Can you outline the any near-term cyclical issues, but also the longer-term secular factors that are at play behind that statement?

Yes. I think there's just been such a glut of re-refined products. As you know, the refinery, the major refineries out there and certainly have scaled back a lot of their plants. And with that, the reduction in fuel and gasoline and subsequently base oil. So that's been positive for our base oil business. But as it relates to jet fuel, particularly, which is basically kerosene, we've seen a lot of that surplus go into the fuels market and the bunker market and particularly with IMO going to a 0.5% sulfur, it appears to us that what we've seen is those surplus gallons going into the fuels market rather than the aviation market. And therefore, the outlook for recycled fuel oils, like the surplus of industrial oils that we see has shrunk. And some of it might have been pandemic related, but I think more of it was just a change in how the market is moving with IMO. And so I think this year, as the airline industry recovers and everybody's guess on when that's going to take place and how fast it's going to happen, we think we're in a really good position here to -- again, see our base oil and our re-refined oil become a real attractive outlet for waste oil.

Our next question comes from the line of Hamzah Mazari with Jefferies.

This is Mario Cortellacci filling in for Hamza. Just question on PFAS with the new Head of the EPA. Could you just talk about whether you think legislation gets done quickly or a time line you think that, that could happen in regarding PFAS? And then any updated views or your best guess on what will happen there? Just wondering if you have any high-level thoughts on potential revenue opportunities? Or at least how much of the pie you think you guys can capture if that becomes an opportunity? And then alternatively, do you view PFAS legislation as a negative or neutral or positive for the solid waste companies?

So I'm not going to comment on the solid waste companies. I'll let the solid waste guys comment on that. But I'd say that -- I think the Democratic House Senate and White House is going to belong PFAS legislation much faster than in another scenario. And I think that we know that PFAS is dangerous. We know that it ultimately will get some form of hazardous designation. The challenge today is PFAS is not has it. And so we've got to work through that. But I do think that is a -- is not really in our budget or guidance numbers today. But certainly, I think that has a long-term impact in the industry. And regardless of how it needs to be disposed, whether through landfills, close plant fills or incineration or water treatment, and we have all those solutions. So I think we're in a really great position to address the PFAS issue as it becomes more and more real.

Yes. I think from a legislative standpoint, it would be positive for our business.

Absolutely. Absolutely.

It's actually a negative at all to us.

No, not at all.

At this point.

Great. And then just following up on the M&A question. I mean, could you give us a little more detail on where you're particularly focused in 2021? And then maybe you can comment on what valuations are looking like right now?

Yes. Certainly, the Waste Disposal side of our business, our Tech Services business, which now includes Safety-Kleen environmental. That is an area where we have -- we think, some real opportunities to continue to grow, to drive more volume across our network to leverage our recycling assets. We have, last year, put in significant capital investments into our incinerators to expand our capacity. Some of it includes shredding, others are just more tickets and more feed systems, better feed systems. You'll continue to see us invest more in our end disposal in our recycling assets. And so expanding our collection network and growing our volume, which we've been really successful, looking at the -- fourth quarter was up about 50,000 drums. So I think when you look at our deferred over $70 million that kind of speaks to just the volume of waste that we have in the network. And that is really where we want to focus our M&A activity on us to continue to grow that side of our business.

Got it. And then just one more, and I'll turn it over. And then just some clarification. I might have missed it earlier in the call or in the prepared remarks, but could you just remind us what you're thinking on COVID-19 cleanup? Or how much is baked into 2021? And then can you also just remind us what the margin profile is for that business?

Sure. So just -- so it's about $120 million for 2020, and we said $25 million to $35 million in revenue in 2021. I think that's a reasonable estimate. The margin profile is a high-margin business. It's in the mid to high, in upper 30s.

Our next question comes from the line of Michael Hoffman with Stifel.

Can we do a little bit of a waterfall, if we could, to pull -- take your revise, so the $573 million on a like-to-like basis to the guidance EBITDA and waterfall, the known, it doesn't repeat. There's a reduction in decontamination and then sort of recovery part. What are those pieces to bridge, let's say, the midpoint of 2021?

Yes, Michael, I'll take a shot at that. So the 2 big kind of headwinds we have going into 2021, is we're assuming that the decontamination work drops kind of precipitously from and the $120 million we did in 2020 to, let's say, a midpoint of $30 million in 2021. So that $90 million drop of revenue is going to take a number of 30%, 35%, it's going to have a big impact on our earnings. And then also, we did get $42 million of government funding, both in the U.S. and with the majority in Canada. That drops also from, let's say, $42 million to $2 million or $2.5 million. And so those are, let's say, the 2 kind of monster headwinds that we're going to have to address here in 2021, and that's a good thing. I'm really bullish on, as I said in my prepared remarks about our end markets and the growth in our end markets, whether it be in the waste projects and remediation, whether it be household has waste days and, let's say, in the ES side. And of course, on the SK side, the re-refineries were down for months. Last year, we shut them down because of lack of demand. And so those come back on, and we should have a really good year. And so I think that you look at the numbers on an apples-to-apples basis, it's down a little bit, and you're like, well, that's interesting, but really, it's due to kind of the one-off unique things and the overall business growing again, which is really what we needed to do.

So if I follow that math and it's a baseline starting at $500 million goes to midpoint at $545 million, so you're up 8% on a like-for-like basis.

That's right. About that, yes.

Okay. And so -- am I thinking about this number correctly, if I look at -- if I take the $120 million out of '20 and then compare revenues year-over-year, you're down almost $390 million?

That's right.

That $390 million is -- would you call it all pandemic-related because of whatever got disrupted, delayed, deferred, that's all pandemic-related?

Absolutely.

Therefore, is there any assumption in your outlook of some of that already being recovered in the guidance? And how much are you assuming? And therefore, that's the potential upside surprise, the pace of which you resume that same $390 million of activity?

Absolutely, you got exactly right. It is -- that is the organic growth number, if you will, taking out the decon work, and that is the x factor is how fast do people get on the road again? How fast do people kind of change their motor oil again? That is the Environmental services business did pretty well. And we're going to lose the decon work, but then we're also going to -- we're going to pick up, let's say, household hazardous wastage, which went on hold for months. And those -- I think that's kind of a modest growth in that business.

And I think we should also mention that we gave away quite a number of price concessions to a lot of our top accounts. And when crude oil crashed in the second quarter, a number of our customers came to us looking for concessions. And certainly, we gave those, and we've been working with our customers. But our goal this year is to normalize our pricing again. And we've recently raised prices on our incineration business, particularly because of just to share demand and volume. So I think there's some price improvements in there, both on concessions, getting back to normal and the price increases.

Absolutely the case. You're right.

And so how would you want us to think about that $390 million? How much of that $390 million, and let's just apply the corporate average margin at, call it, 7.5% of that. How much of that's in below to the high of guidance?

The high end of the guidance, we get all the way back there. On the low end, we're obviously well short of that.

Okay. So that's the way to think about what that opportunity is. And then can we talk about some of your metrics. You all have done a really good job of moving the free cash flow as a conversion of your EBITDA out of the 30s into the 40s. You're in the sort of low 40% of EBITDA now, 43%, 45%. Is that sort of the where it is and now it's all about the sustainable growth of it, doing the asset utilization and pricing? Or is there still improvement in the actual ratio?

Michael, I'm sitting here with my CEO, he'll never say we're done, right? He would never acknowledge, no, when rate shape just keep it going, right? I do think there's opportunity there. The team does a great job of kind of -- we have 5 refurbishment jobs, for example, we build our own trucks. There's and we're going to continue to do that, maybe expand on that. There's opportunities here to drive more free cash flow, better working capital management, better controls of inventory and receivables. I mean, there's -- I don't think there's -- I think cash conversion as well as upside to be fair.

So if you thought about that, that was a setup. I knew, Alan was sitting there going, of course, it's going up. Where can it go? What's practical?

Our goal is to get to $300 million in free cash flow. And I don't think it will have to be through earnings. So I think that we're going to -- we have -- as part of our incentive plans, we all have targets to lower our receivables. We all have targets of lower inventory and to manage our working capital better. And I think there's opportunity there using systems and processes to just that.

And if I thought about that $300 million as a percentage of your EBITDA, what do you think that is?

The time will tell how fast, but I do think that we've had great trajectory. As you know, we've had a 8%, 9% CAGR on free cash flow over the past few years, and that should continue.

Okay. Then lastly for me, on Safety-Kleen Oil, what was the plant production volume in '20? And are we back to $150 million is what should be produced in '21, so I can compare those 2 numbers?

I don't have the historical number, but all plants are kind of fully operational here in 2021.

So '21 you assume to do -- you should -- all things being Eagle put out 150 million gallons of base oil?

Probably a little bit less than 2019 still because ethane anemic still have an impact on overall miles driven. But -- we certainly -- as you know, we shut down 4 of our plants for a number of weeks because of -- and several for months because of not enough oil to collect because of all the shutdowns and not enough oil to sell because of the same. So I think you're going to see that come back nicely this year.

Okay. And I'd say one last one. I just want to clarify on PFAS you don't actually need legislation. If EPA puts out an MCL and then enforces to the MCL, that in itself will drive the part of the market that's most important to you, which is remediation. And legislation would be more about what might happen on the drinking water side. Would you agree with that?

Yes. I think that's true. And we're certainly seeing opportunities. We have pipeline of PFAS opportunities for sure. And then we see customers realizing that they need to get ahead of that. And again, most of this that we see is a lot of it is foam fire-related and bio foam related, I should say. And I think those are the natural locations where they're trying to quantify and understand what the remedy is going to be. But the legislation or EPA mandating certain changes, I think, will be helpful to have a have a framework to work around.

Our next question comes from the line of Jeff Silber with BMO Capital Markets.

I was looking over the transcript from last year's call at this time. Obviously, it was before the pandemic really had an impact, but there was a lot of conversation about IMO 2020. You talked a little bit about this, and I know it may be tough to quantify, but is there any positive impact that you're building into your guidance for 2021 from that?

Not yet. No, it's really been such a disruption, as you know, particularly with just the jet fuel market, particularly the glut in that fuel. So I think until that works itself out, it's really difficult to quantify right now.

Okay. That's fair enough. And then one kind of housekeeping note. Mike, you talked a little bit about the change in the adjusted EBITDA calculation for next year. I do understand it. But why now? I mean the peers have been doing it for a long time. It's been in your leverage agreements for a long time. What precipitated this change?

Yes, Jeff, good question. 2 things. First of all, we did change kind of all our debt agreements. And the last 1 was to change was the revolver, which we did in November. And so that was a -- we thought that was a good time to do it. And we thought the first of the year would be a perfect time to do it and set expectations appropriately. And those were kind of the driving reasons.

Our next question comes from the line of Larry Solow with [SGS] Securities.

Congrats on a really good year and a challenging environment for sure. Absolutely. Just a few questions on -- just on the mix and the pricing. You mentioned, Alan, you're going to perhaps firm up some pricing on the incinerator on the disposable business, at least. Just trying to parse that out with -- obviously, mix has driven great improvement the last few years and even this quarter. Just looking at the quarter first, was there anything unusual with the 16% increase in price per pound on the incinerator side and over 40 on the landfill, any unique waste streams in there? And I think there was something that arrived like late in the third quarter, is that sort of benefit this quarter? And second part of the question is, how do you -- as you look out over the next few years? Do you see sort of some of these gains in mix at least slowing? Can you continue to at least maintain this pricing and maybe improve it solely over time?

Yes, Larry, I'll start, and Alan, feel free to chime in. The -- Larry, this is really just a continuation of which has been happening all last year, where there are kind of high-margin waste streams, us going after aggressively marketing and going after these waste streams and achieving -- getting these wastes into our network. Alan talked about drum volumes. Drum volume is very profitable business for us. We have a lot of drums in Q4. And I don't see that -- I don't think that's unique, a Q4 thing. I think that the price per pound is great, probably a little higher than normal, but we've had this -- we've had double-digit kind of pricing all year, Larry, and that just continues here in Q4. I don't see that changing. We talk to the team, and they say the pipeline is strong to continue to get these kind of high-margin streams. And I don't see that kind of changing certainly in the near term.

And I think just 2 things that I would add to it is that we're seeing new generators, right? And so you've got this chemical renaissance where low natural gas pricing has really brought back a number of plants and manufacturing to the states. And so we're seeing -- the new plants now starting up, new waste streams coming into the market, and some of those are real difficult streams to handle, right? We're also seeing captives reducing and also being impacted from the pandemic and subsequently, maybe outsourcing more of their material than they've historically had because of the pandemic or because of the maybe demand on some of their operations. So there has been a little bit of that going on the captive side. So I think both those things really help us from the mix and average price per pound.

And on the captive, as they start to outsource more, does this inevitably lead them towards a full closure of their captive? I would think if they outsource more, maybe that's even less efficient for them, sort of double paying, if you will?

Most captives have been built as sort of an end of the pipe of their production facility. And many times, it's because of the difficult type of waste streams that they are that they actually put that kind of capital investment in. And with all the changes that have gone on in the chemical industry, the acquisitions, the divestitures, the impact on regulations to those plants has certainly driven some of them to look at outsourcing as well as a reduction, in some cases, volumes being handled at those captive sites, making it economical to now look at outsourcing it rather than continue to run a captive plant maybe at 30% or 40% utilization. So I would say those are the things that are driving that change, Larry.

Right. Okay. And just switching gears. On the Safety-Kleen side, you mentioned collection prices remain high. As the price of oil starts to come back up or at least in the beginning of '21, it's certainly rebounding. Does this face more challenges maybe oil don't want to necessarily give you their oil at a high price, if the underlying value is increasing?

No, Larry, it's really -- we manage the spread, as we said before, and that put some pressure on our charge-for-oil program. But I think that -- really, what we need is demand to come back, and we do see that happening here in 2021.

Okay. And then just lastly, on the cost cuts and whatnot. Obviously, in 2020, I think you guys did an expedited job and sort of keeping the cost down as revenue sort of swooned in the middle of the year. I would think this makes for a little bit of a difficult comp as things come back, but it does seem like you guys are -- some of this has been sort of offset by productivity gains and maybe bringing back all of your staff or maybe a less third-party and more direct expenses direct employees. Perhaps if you can just give us a little more light on that?

I think a little bit of both, right? Certainly, we have learned to operate with a lot less people and a lot of people working from home. And so we have certainly been able to reduce cost in many areas of the business, and we think that those costs could continue to be at those reduced levels. And that's, I think, why you're looking at SG&A and some of the benefits we see grow through there this year. Mike, do you want to add anything?

Yes. I just going to say, Larry, that as you look at 2021, things like that we got a natural benefit for like health care or T&E or commissions. I mean, those -- we hope, come back with the economy coming back and people being able to travel and people hitting their incentive targets and getting commission payments, that's great. But that only happens if the economy does come back. If it doesn't come back, I think that we'll still stay at these lower levels. I also would say that Alan and the team did a good job of using the pandemic and leveraging the pandemic and look at third-party spend and drive and do a lot more things internally, whether it be third-party subcontractors, third-party labor, third-party trucking, I mean those costs, they don't come back. I think those guys stay out of the business, and we definitely use the pandemic as a catalyst to drive some of that out of those costs out of the business.

[Operator Instructions]. Our next question comes from the line of Jim Ricchiuti with Needham.

The question on the COVID-related work that you're anticipating, let's call it, the $30 million at the midpoint. Is the assumption that, that's more, I would assume, is more front-end loaded? Is that -- are you seeing that activity at a relatively higher level in Q1 again because of what we're seeing?

Yes, Jim, that's definitely loaded in the first half of the year. We do think that -- with the turn of the calendar, we had -- as you know, we had a great finish in that decon level of that still there. It didn't change in January. We do see it now. As I mentioned in my prepared remarks, we do see it starting to slow. And frankly, that's a good thing. So it's mostly -- that midpoint of $30 million is definitely a first half phenomenon.

And certainly, we have a backlog in our Field Services business so that our intent here is we're going to take a lot of those people and responses and get back into the basic Field Services side of our business, which certainly get impacted quite a bit with the COVID, but the response work certainly offset that. But we're -- we have a lot of backlog across our business here, and we think that capacity will free up then be utilized in other parts of our business now.

Alan, is there any way to maybe size that Field Services backlog that might have been deferred a bit just because of you dealing with some of the COVID-related emergency work?

Yes. It's hard to quantify. But the pipeline is really good in that business. It's strong with the consolidation of Safety-Kleen environmental with Clean Harbors tech services, we're seeing a lot more project opportunities coming across. And quite frankly, those are smaller jobs, but a lot more of them. And honestly, we weren't as responsive probably to that cross-sell as we could have been last year due to just the demand we had from COVID. And so I think we're going to be more responsive. We're going to convert more of that -- those opportunities into Field Services moving forward.

And it sounds like your you've been encouraged by the pickup in the ES business, certainly from the lows, I think that's probably fair to say. I'm wondering, as you look at that business, which areas -- chemicals clearly has been a nice recovery, which areas have been lagging that we might start to see pickup as you think about '21?

certainly, the refining side of the -- our Refining business, which is about a $500 million business for us. They've really been hit hard, particularly with -- in the Gulf area, as you know. And so I would say that's going to lag. The oil and gas industries, particularly in Western Canada, some of the work that we do out in the oil and gas drilling side, the waste disposal we get off, the drilling rigs and what have you. That's obviously just starting to come back. So those are some of the parts of the industries or the verticals that we're seeing lag behind. But our manufacturing is really strong. Chemical is really strong. Pharmaceutical, Biotech, those industries are really strong. We're winning some really nice business in that area. So I think all-in-all, we feel pretty good that our customers are coming back.

And on the SK business, the branch business, does that -- maybe you can just remind us on seasonality in Q1. Is there any -- I guess, what I'm asking is, it was kind of flattish Q4 versus Q3. Are you seeing signs there of the pickup in activity? Or is it still too early in the year to really make any -- draw any conclusions from what you're seeing?

I think the Safety-Kleen branch business, which is 200 locations strong did get impacted, certainly with some of the weather-related shutdowns seeing here in the last couple of weeks. But -- and moving into 2021, we saw a lot of markets still frozen with COVID and shutdowns. Particularly in Ontario, Quebec, Alberta, California, significant shutdowns and curtailment of activities out there. So that really hurts the Safety-Kleen branch side of the business. But we're really optimistic that when things turn on and the government opens up more of the country, both the U.S. and Canada, then we'll see a real uptick in activity for the branch. And I think that's why Mike sort of said, it's more back-end loaded there.

Fair enough. Last question, Mike, I may have missed it. Did you give any guidance for tax rate in '21?

I didn't, but it should be in the kind of mid- to high 20s.

We have no further questions at this time. I would now like to turn the floor back over to management for closing comments.

Okay. Thanks for joining us today. We continue to maintain a busy IR calendar with many upcoming virtual events. Including JPMorgan, Raymond James, Bank of America and Stifel, and we look forward to connecting with many of you there. And I hope that all of you and your families stay safe. Thank you.

Ladies and gentlemen, this does conclude today's teleconference. You may disconnect your lines at this time. Thank you for your participation, and have a wonderful day.