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目录
美国
证券交易委员会
华盛顿特区20549
_______________________
表格 10-Q
根据1934年证券交易所法案第13或15(d)条的季报告
截至季度结束2024年9月30日
在过渡期从 到
委员会档案编号 001-34223
_______________________
CH Logo_RED_rgb.jpg
CLEAN HARBORS, INC.
(依凭章程所载的完整登记名称)
麻萨诸塞州04-2997780
(成立或组织的州或其他辖区)(国税局雇主身份识别号码)
42 Longwater DriveNorwell马萨诸塞州02061-9149
(总部地址)(邮政编码)
注册人电话号码,包括区号: (781) 792-5000
根据法案第12(b)条规定注册的证券:
每种类别的名称交易符号每个注册交易所的名称
普通股,每股面值0.01美元CLH纽约证券交易所
请打勾表示:(1)在过去12个月内(或规定申报此类报告之较短时期内),已依据1934年证券交易所法第13条或第15(d)条的规定提交所有要求申报的报告;和(2)在过去90天内一直受到此项申报要求的影响。  
勾选表示该登记人是否在过去12个月内(或者对于该登记人需要提交这些档案的较短时间内)根据Regulation S-t的第405条要求提交了每个互动数据档案。   
请以录取标记表示是否申报人是一家大型迅速成长的档案公司、一家迅速成长的档案公司、一家非迅速成长的档案公司、一家较小的申报公司或一家新兴增长公司。请参见「大型迅速成长的档案公司」、「迅速成长的档案公司」、「较小的申报公司」和「新兴增长公司」在《交易所法》第120亿2条的定义。(选择一个):
大型加速归档人加速归档人
非加速归档人小型报告公司
新兴成长型企业
如果一家新兴成长型公司,请用勾选标记表示该申报人已选择不使用根据证交所法案13(a)条款提供的任何新的或修订过的财务会计准则的延长过渡期。
勾选方框表示申报人是否为空壳公司(如《交易所法》第120亿2条所定)。是
2024年10月25日,登记公司普通股$0.01面值的持股数目为 53,899,103.



CLEAN HARBORS, INC.
第10-Q表格季度报告
目 录
页码。




目录
礼本达有限公司及其附属公司
合并资产负债表
(以千为单位)
2024年9月30日2023年12月31日
资产(未经审计)
流动资产:
现金及现金等价物$512,371 $444,698 
短期有价证券82,371 106,101 
应收账款,扣除$账面值的呆账48,570 15.142,209,分别为
1,100,660 983,111 
未计费应收账款204,308 107,859 
存货和补给品376,564 327,511 
预付费用及其他流动资产78,204 82,939 
全部流动资产2,354,478 2,052,219 
不动产、厂房及设备净值2,452,312 2,193,318 
其他资产:
营运租赁权使用资产246,061 187,060 
商誉1,485,065 1,287,736 
许可证和其他无形资产,净值708,935 602,797 
其他长期资产59,159 59,739 
其他总资产2,499,220 2,137,332 
资产总额$7,306,010 $6,382,869 
负债及股东权益
流动负债:
长期债务的当期偿还$15,102 $10,000 
应付账款504,206 451,806 
逐步认列的收入103,291 95,230 
应计费用及其他流动负债398,236 397,157 
终止、永久闭锁及矫正责任之流动部分30,477 26,914 
营运租赁负债的流动部分70,539 56,430 
流动负债合计1,121,851 1,037,537 
其他负债:
关闭和后关闭负债,减去资产当期部分 $14,203 15.113,556,分别为
105,375 105,044 
补救负债,减去资产当期部分 $16,274 15.113,358,分别为
94,384 97,885 
长期负债,不含流动部分2,773,659 2,291,717 
营业租赁负债,扣除当前部分179,040 131,743 
递延所得税负债356,150 353,107 
其他长期负债147,241 118,330 
其他负债总额3,655,849 3,097,826 
承诺和条件性负债(见附注15)
股东权益:
0.010.01 每股面额:
已授权 80,000,000$53,898,80553,929,703 分别为股份
539 539 
资本公积额额外增资438,904 459,728 
累积其他全面损失(192,036)(175,339)
保留收益2,280,903 1,962,578 
股东权益总额2,528,310 2,247,506 
负债和股东权益总额$7,306,010 $6,382,869 

附注是这些未经审计的合并财务报表的一个不可分割的部分。
1

目录
礼本达有限公司及其附属公司
未经审核的综合营业损益表
(以千为单位,除每股金额外)
结束于三个月的期间九个月结束了
九月三十日,九月三十日,
2024202320242023
收入:
服务收入$1,278,955 $1,129,216 $3,719,183 $3,341,539 
产品收入250,467 236,480 739,653 729,444 
总收益1,529,422 1,365,696 4,458,836 4,070,983 
营收成本: (不包括以下列明的款项)
服务收入872,829 765,004 2,539,569 2,288,199 
产品收入182,770 178,947 522,642 534,778 
总营业成本1,055,599 943,951 3,062,211 2,822,977 
销售、一般及管理费用177,846 171,019 557,590 505,154 
环保母基增值3,618 3,388 10,139 10,281 
折旧与摊提100,063 92,970 295,632 267,425 
营业收入192,296 154,368 533,264 465,146 
其他(支出)收入,净额(1,123)334 (2,431)(833)
提早偿还债务的损失   (2,362)
利息费用,扣除利息收入净额$5,391, $2,877, $13,2577,833,分别为
(35,779)(29,696)(100,767)(80,400)
所得税前净利155,394 125,006 430,066 381,551 
所得税费用40,181 33,666 111,741 102,044 
净利润$115,213 $91,340 $318,325 $279,507 
每股盈余:
基础$2.14 $1.69 $5.90 $5.17 
稀释$2.12 $1.68 $5.87 $5.14 
用于计算基本每股收益的股份53,951 54,122 53,936 54,097 
用于计算稀释每股收益的股份54,229 54,419 54,229 54,411 
    

所附注释是这些未经审计的合并财务报表的组成部分。
2

目录
凯富环境公司及其子公司
未经审计的综合损益表
(以千为单位)
 三个月之内结束九个月结束
2020年9月30日2020年9月30日
 2024202320242023
净收入$115,213 $91,340 $318,325 $279,507 
其他综合损失,税后净额:
可供出售证券未实现收益262 93 170 311 
利率对冲工具公允价值未实现(损失)收益(9,361)7,801 2,406 15,528 
净利润中实现的利率对冲金额的重分类调整(3,806)(3,650)(11,260)(12,704)
利率对冲结算的重分类调整   (5,905)
养老金调整项(10)6 18 (1)
外币翻译调整5,369 (7,423)(8,031)813 
其他综合损失,净额(7,546)(3,173)(16,697)(1,958)
综合收益$107,667 $88,167 $301,628 $277,549 

所附注释是这些未经审计的合并财务报表的组成部分。
3

目录
凯富环境公司及其子公司
未经审计的现金流量表
(以千为单位)
九个月已结束
九月三十日
20242023
来自经营活动的现金流:
净收入$318,325 $279,507 
为核对净收益与经营活动净现金而进行的调整:
折旧和摊销295,632 267,425 
可疑账款备抵金5,674 2,620 
递延融资成本和债务折扣的摊销4,623 4,036 
环境负债的增加10,139 10,281 
环境负债估算值的变化4,347 3,258 
递延所得税(418)(356)
其他费用,净额2,431 833 
基于股票的薪酬20,690 14,809 
提前清偿债务造成的损失 2,362 
环境支出(19,679)(24,064)
扣除收购后的资产和负债变化:
应收账款和未开票的应收账款(145,647)(46,445)
库存和供应(39,673)12,691 
其他流动和长期资产
(47,826)(18,190)
应付账款30,004 (40,013)
其他流动和长期负债35,211 (13,062)
经营活动产生的净现金473,833 455,692 
用于投资活动的现金流:
不动产、厂房和设备的增加(369,826)(311,906)
出售和处置固定资产的收益6,353 5,129 
收购,扣除获得的现金(474,011)(119,596)
出售业务的收益750 750 
无形资产的增加,包括获得或续订许可证的费用(2,545)(1,507)
购买可供出售证券(73,682)(104,329)
出售可供出售证券的收益100,021 84,390 
用于投资活动的净现金(812,940)(447,069)
来自(用于)融资活动的现金流:
未兑现支票的变更(5,852)3,004 
与既得限制性股票预扣税相关的纳税款项(11,514)(10,886)
回购普通股(30,215)(18,000)
已支付的递延融资费用(8,316)(6,371)
融资租赁的付款(23,596)(11,594)
债务本金支付(11,327)(621,475)
减去折扣后的债务发行收益499,375 500,000 
从循环信贷额度借款 114,000 
循环信贷额度付款 (114,000)
来自(用于)融资活动的净现金408,555 (165,322)
汇率变动对现金的影响(1,775)61 
现金和现金等价物的增加(减少)67,673 (156,638)
现金和现金等价物,期初444,698 492,603 
现金和现金等价物,期末$512,371 $335,965 
补充信息:
利息和所得税的现金支付:
已付利息$134,177 $100,813 
已缴的所得税,扣除退款100,752 107,328 
非现金投资活动:
应计财产、厂房和设备43,604 29,127 
为换取经营租赁负债而获得的ROU资产98,927 61,741 
为换取融资租赁负债而获得的ROU资产53,391 26,317 
所附注释是这些未经审计的合并财务报表的组成部分。


4

目录
凯富环境公司及其子公司
未经审计的股东权益合并报表
(以千为单位)
普通股累积的
其他
综合亏损
编号

股份
$0.01
单位:美元。
数值
共计
实收
资本
未分配利润
股东的
股权
2024年1月1日的余额53,930 $539 $459,728 $(175,339)$1,962,578 $2,247,506 
净收入— — — — 69,832 69,832 
其他综合损失— — — (4,287)— (4,287)
以股票为基础的报酬计划— — 6,338 — — 6,338 
发行普通股以用于限制股份解禁,扣除员工税款23 — (3,052)— — (3,052)
购回普通股(27)— (5,000)— — (5,000)
2024年3月31日结存余额53,926 539 458,014 (179,626)2,032,410 2,311,337 
净收入— — — — 133,280 133,280 
其他综合损失— — — (4,864)— (4,864)
以股票为基础的报酬计划— — 8,515 — — 8,515 
发行普通股用于限制性股票解锁,净员工税款扣除27 — (1,547)— — (1,547)
购回普通股(23)— (5,000)— — (5,000)
2024年6月30日余额53,930 539 459,982 (184,490)2,165,690 2,441,721 
净收入— — — — 115,213 115,213 
其他综合损失— — — (7,546)— (7,546)
以股票为基础的报酬计划— — 5,837 — — 5,837 
发行普通股用于受限股份解禁,减去员工税款代扣54 1 (6,916)— — (6,915)
购回普通股(85)(1)(19,999)— — (20,000)
2024年9月30日的余额53,899 $539 $438,904 $(192,036)$2,280,903 $2,528,310 


5

Table of Contents
CLEAN HARBORS, INC. AND SUBSIDIARIES
UNAUDITED CONSOLIDATED STATEMENTS OF STOCKHOLDERS’ EQUITY (CONTINUED)
(in thousands)
普通股累积的
其他
综合亏损
编号

股份
$0.01
单位:美元。
数值
共计
实收
资本
未分配利润
股东的
股权
2023年1月1日余额54,065 $541 $504,240 $(167,181)$1,584,722 $1,922,322 
净收入— — — — 72,401 72,401 
其他综合损失— — — (14,346)— (14,346)
以股票为基础的报酬计划— — 6,018 — — 6,018 
发行普通股用于受限股权解锁,扣除员工税款后的净利润49 — (3,351)— — (3,351)
购回普通股(22)— (3,000)— — (3,000)
2023年3月31日的余额54,092 541 503,907 (181,527)1,657,123 1,980,044 
净收入— — — — 115,766 115,766 
其他综合收益— — — 15,561 — 15,561 
以股票为基础的报酬计划— — 4,500 — — 4,500 
发行普通股以供限制股份解禁,扣除员工税款34 — (984)— — (984)
购回普通股(36)— (5,001)— — (5,001)
2023年6月30日的余额54,090 541 502,422 (165,966)1,772,889 2,109,886 
净收入— — — — 91,340 91,340 
其他综合损失— — — (3,173)— (3,173)
以股票为基础的报酬计划— — 4,291 — — 4,291 
发行普通股以支付受限股份的解锁,扣除员工税款71 1 (6,552)— — (6,551)
购回普通股(58)(1)(9,998)— — (9,999)
2023年9月30日结余54,103 $541 $490,163 $(169,139)$1,864,229 $2,185,794 

所附注释是这些未经审计的合并财务报表的组成部分。
6

目录
凯富环境公司及其子公司
未经审计的合并财务报表附注

(1) 提供的基础
附注的合并中期财务报表尚未经审计,包括clean harbors公司及其子公司的账户(以下简称为“clean harbors公司”或“本公司”),并根据证券交易委员会(“SEC”)的规定和法规编制,据管理层的意见,已包括所有属于正常循环性质的调整,并为呈现所述期间的财务状况、经营业绩和现金流需要的公允陈述进行了准备。管理层对公司合并中期财务报表及相关附注所报金额进行了估计和假设;实际结果可能与这些估计和判断有所不同。中期期间的结果未必能反映整个年度或其他任何中期间的结果。本处呈现的财务报表应与公司截至2023年12月31日的年度10-k表中包含的财务报表一起阅读。

(2) 重要会计政策
公司的重要会计政策详见于公司2023年12月31日年度报告第10-K表格的附注2“重要会计政策”中。

尚未采用的会计声明

2023年11月,财务会计准则委员会("FASB")发布了会计准则更新("ASU")2023-07号,《板块报告(主题280):报告板块费用披露改进》,要求在年度和中期基础上增强对重要板块费用的披露。该指导将于2024年1月1日开始的公司年度期间生效,并从2025年1月1日开始的中期生效。允许提前采用。采纳后,指导应按照所有在基本报表中呈现的先前期间进行追溯应用。本ASU的要求与披露有关,不会影响公司的财务状况、经营业绩或现金流量。公司目前正在评估采纳该ASU对其可报告板块披露的影响。》,要求在年度和中期基础上增强对重要板块费用的披露。该指导将于2024年1月1日开始的公司年度期间生效,并从2025年1月1日开始的中期生效。允许提前采用。采纳后,指导应按照所有在基本报表中呈现的先前期间进行追溯应用。本ASU的要求与披露有关,不会影响公司的财务状况、经营业绩或现金流量。公司目前正在评估采纳该ASU对其可报告板块披露的影响。》,要求在年度和中期基础上增强对重要板块费用的披露。该指导将于2024年1月1日开始的公司年度期间生效,并从2025年1月1日开始的中期生效。允许提前采用。采纳后,指导应按照所有在基本报表中呈现的先前期间进行追溯应用。本ASU的要求与披露有关,不会影响公司的财务状况、经营业绩或现金流量。公司目前正在评估采纳该ASU对其可报告板块披露的影响。

2023年12月,FASB发布了ASU编号2023-09,所涉及的是《收入税(主题740)》控件 所得税披露改进,该指南增强了与税率对账和已交所得税有关的收入税披露。该指南将于2025年12月31日年度开始生效。允许提前采用。采纳后,可前瞻性或回顾性应用该指南。本ASU的要求与披露有关,不会对公司的财务状况、经营成果或现金流产生影响。公司目前正在评估采用该ASU对其所得税披露的影响。

2024年3月,SEC根据SEC发布编号33-11275采纳了最终规则。 增强和标准化为投资者提供的与气候相关的披露规则要求披露,包括但不限于:重大气候相关风险;减轻或适应此类风险的活动;管理此类风险的治理和管理;以及重大范围1和范围2温室气体排放量。此外,该规则要求在基本报表附注中披露严重天气事件和其他自然情况的影响,但须符合一定的重大性门槛。该规则将在分阶段时间表上生效,从截至2025年12月31日的年度开始。2024年4月4日,SEC自愿暂停执行最终规则,以促进对规则的未决法律挑战有序的司法解决。公司目前正在监视法律挑战,并评估最终规则以判断其对公司合并财务报表和披露的潜在影响。

(3) 营业费用
公司通过以下经营部门产生营业收入:环保服务和Safety-Kleen可持续解决方案(“SKSS”)。 公司的环保服务经营部门通常具有 四个 营业收入来源,而SKSS经营部门具有 两个 营业收入来源。 公司按地理位置和营业来源对第三方营业收入进行细分,因为管理层认为这些类别描绘了营业收入和现金流受经济因素影响的方式。 公司的主要营业收入来源包括:
7

目录
技术服务技术服务为环保母基运营部门的营业收入做出了贡献。这些服务的营业收入来自于对废物管理和处置服务收取的费用,包括现场环境管理服务、收集和运输、包装、回收、处理和处置废物以及整治项目。这些服务处理有害和/或非有害废物,包括全氟烷基和聚全氟烷基物质(“PFAS”)。营业收入主要来自于短期项目,其中大部分由长期性质的主服务协议管理。这些主服务协议通常与公司较大的客户签订,并概述了这些安排的定价和法律框架。服务是根据购买订单或与客户的协议提供的,并包括基于废物、材料和人员成本以及运输和其他费用的价格。收集和运输收入随着时间的推移计入,随着客户在执行过程中接收和消耗服务的利益,并且公司有权利就已完成的表现而获得支付。公司使用输入法来随时间确认收入,基于时间和材料支出作为测量履约责任满意度的基础。处理和废物处置的营业收入在处理完成、最终安排在填埋场或焚化炉处置结束,或者将废物运往第三方进行处理和清除时确认。公司定期进行收集、运输和废物处置的捆绑安排。对于这种安排,运输和处置被视为独立的履约责任,公司根据各自的独立销售价格(即客户在独立基础上预计支付服务的价格)分配营业收入。尚未完全处理和处理的废物的营业收入和相关成本被推迟。待服务完成后,推迟的收入和成本得到确认。收集和运输与最终处理和清除之间的时间段因客户地点而异,但一般以日为单位。
工业服务工业服务为环保母基经营部门的营业收入做出贡献。 这些营业收入主要来自于在北美为炼油厂、化工厂、制造工厂、发电公司和其他工业客户提供的工业和特殊服务。 服务包括厂内清洁和维护服务、厂区停工和轮换服务、专业清洁服务,包括化学清洁、管道清洗和高压和超高压水清洗,泄漏检测和修理,采光照明,生产服务和上游能源服务。 服务是基于购买订单或客户协议提供的,包括设备、材料和人员的日常、小时或作业价格。 公司按照时间来确认这些服务的营业收入,因为客户在服务进行时接收并消费服务的好处,公司有权获得迄今为止完成的履约的支付。 公司使用输入法来按照时间确认营业收入,根据发生的时间和材料。
Field and Emergency Response Services—Field and Emergency Response Services contribute to the revenues of the Environmental Services operating segment. Field Services revenues are generated from cleanup services at customer sites, including those managed by municipalities and utility providers, or other locations on a scheduled or emergency response basis. Services include confined space entry for tank cleaning, site decontamination, environmental remediation, railcar cleaning, manhole/vault clean outs, product recovery and transfer and vacuum services. Additional services include filtration, water treatment services and wetland restoration. Response services for environmental emergencies of any scale range from man-made disasters such as oil spills to natural disasters like hurricanes. Emergency response services also include spill cleanup on land and water, as well as contagion disinfection, decontamination and disposal services. Field and emergency response services are provided based on purchase orders or agreements with customers and include prices generally based upon daily, hourly or job rates for equipment, materials and personnel. The Company recognizes revenue for these services over time, as the customer receives and consumes the benefits of the services as they are being performed and the Company has a right to payment for performance completed to date. The Company uses the input method to recognize revenue over time, based on time and materials incurred. The duration of such services can be over a number of hours, several days or even months for larger scale projects.
Safety-Kleen环保服务—Safety-Kleen环保服务的营业收入对环保服务经营部门和SKSS经营部门均有贡献,具体取决于这些收入的性质以及与执行收入合同相关的营运责任。提供集装式废物处理和处置服务、零件清洗服务和真空服务等服务的收入共同称为Safety-Kleen分支机构的核心服务提供,为环保服务经营部门的营业收入做出贡献。此外,包装混合油产品的销售和其他相关产品销售也为环保服务经营部门的营业收入做出贡献。从废油、防冻液和油滤收集服务、散装混合油产品销售以及散装汽车流体销售中产生的收入为SKSS经营部门的营业收入做出贡献。
通常,服务的收入是随着时间的推移逐步确认,随着客户在服务执行过程中收到和消费服务的好处,并且公司有权利收取已完成的服务的付款。这类服务的持续时间可能长达数小时或数天。公司采用输入法来根据已发生的时间和材料来逐步确认营业收入。产品收入是在控制权转移时确认的,即当产品交付给客户时控制权转移。集装箱废物服务包括废物的剖析、收集、运输和回收利用或
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处理各种类型的废物。相关的收集和运输营业收入将随着时间逐步确认,因为客户在服务执行过程中接受并消费服务的好处,公司有权获得迄今为止已完成的业绩支付。部件清洗服务包括客户使用公司的部件清洗设备、清洁和维护部件清洗设备以及更换和回收使用过的清洁液。由于安排具有高度集成和相互依存的特性,部件清洗服务被视为单一履约义务。部件清洗服务的收入将在服务间隔期间逐步确认,因为客户在服务过程中获得服务的好处。
Safety-Kleen OilSafety-Kleen Oil相关销售贡献了SKSS业段的营业收入。这些收入是通过向第三方分销商、政府机构、车队、铁路和工业客户销售高质量的基础和混合润滑油而产生的。该业务还向沥青厂、工业厂和纸业股公司销售回收的燃料油。废油还被加工成真空气体油,可以进一步重新精炼为润滑油基础油,或直接销售给海洋柴油燃料市场。油品的收入在时间点上确认,即在产品交付给客户时。当产品交付给客户时,控制权转移。
以下表格显示公司的第三方营业收入按营业来源和地理位置分解(单位:千美元):
2024年9月30日止三个月
环保母基服务。Safety-Kleen可持续解决方案公司总费用
主要地理市场
美国$1,166,660 $218,963 $96 $1,385,719 
加拿大120,990 22,713  143,703 
第三方总营业收入$1,287,650 $241,676 $96 $1,529,422 
营收来源
技术服务$437,180 $ $ $437,180 
工业服务和其他
345,573  96 345,669 
现场应急响应服务260,200   260,200 
安全净化环保母基服务244,697 59,675  304,372 
安全净化油 182,001  182,001 
第三方总营业收入$1,287,650 $241,676 $96 $1,529,422 
2023年9月30日止三个月
环保母基服务。Safety-Kleen可持续解决方案公司总费用
主要地理市场
美国$1,017,224 $206,860 $112 $1,224,196 
加拿大118,055 23,445  141,500 
第三方营业收入总额$1,135,279 $230,305 $112 $1,365,696 
营收来源
技术服务$403,889 $ $ $403,889 
工业服务及其他
350,251  112 350,363 
现场和紧急响应服务155,046   155,046 
Safety-Kleen环保母基服务226,093 59,458  285,551 
Safety-Kleen油品 170,847  170,847 
第三方营业收入总额$1,135,279 $230,305 $112 $1,365,696 
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2024年9月30日止九个月
环保母基服务。Safety-Kleen可持续解决方案公司总费用
主要地理市场
美国$3,395,446 $645,664 $297 $4,041,407 
加拿大350,781 66,648  417,429 
第三方总收入$3,746,227 $712,312 $297 $4,458,836 
营收来源
技术服务$1,288,339 $ $ $1,288,339 
工业服务和其他
1,064,441  297 1,064,738 
现场和应急响应服务676,562   676,562 
Safety-Kleen环保母基服务716,885 171,117  888,002 
Safety-Kleen石油 541,195  541,195 
第三方总收入$3,746,227 $712,312 $297 $4,458,836 
2023年9月30日止九个月
环保母基服务。Safety-Kleen可持续解决方案公司总费用
主要地理市场
美国$3,017,547 $641,625 $335 $3,659,507 
加拿大340,196 71,280  411,476 
第三方总营业收入$3,357,743 $712,905 $335 $4,070,983 
营收来源
技术服务$1,160,306 $ $ $1,160,306 
工业服务和其他1,086,175  335 1,086,510 
现场和应急响应服务457,491   457,491 
Safety-Kleen环保母基服务653,771 171,469  825,240 
Safety-Kleen石油 541,436  541,436 
第三方总营业收入$3,357,743 $712,905 $335 $4,070,983 
合同余额
(以千为单位)2024年9月30日2023年12月31日
应收账款$1,100,660 $983,111 
合同资产(未开票应收款)204,308 107,859 
合同负债(递延营业收入)103,291 95,230 

收入确认、账单和现金收取的时间会导致合并资产负债表上出现已开单的应收账款、未开单的应收账款(合同资产)和客户预付款和存款或递延收入(合同负债)。通常,计费是在收入确认之后进行的,因为付款权不仅受时间推移的影响,还会产生合同资产,这些资产通常被归类为流动资产。公司有时会在确认收入之前从客户那里收到预付款或存款,从而产生合同负债。这些资产和负债在每个报告期结束时按合同在合并资产负债表上报告。列报的每个期初的合同负债余额通常在随后的期限中得到充分确认 三个月 时期。

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(4) 业务组合
2024年收购
2024年3月22日,该公司完成了收购Hepaco Blocker,Inc.及其子公司(统称“HEPACO”),全部现金购买价格为$392.2 百万美元,净现金收购。该公司于2024年第三季度结清了本次收购的营运资本余额,并相应调整了购买价格。 HEPACO的业务扩展了环保母基服务业务板块的现场服务业务。
购买价格的初步分配是临时的,基于2024年3月22日资产取得和负债承担的公允价值的估计。公司将继续获取信息,完成这些余额的估值和相关的所得税会计。测量期调整将反映关于在收购日存在的事实和情况的新信息。 下表总结了所取得的资产和承担的负债的初步确认和确认(以千为单位):
根据2024年3月31日的披露,在收购日期(不应计入其他所有项目的除外)
在收购日期
如报告的
2024年9月30日
应收账款,包括未开票款项$68,496 $1,777 $70,273 
存货和用品1,574 (1,190)384 
预付费用和其他流动资产5,221 (681)4,540 
资产:固定资产45,453 817 46,270 
许可证和其他无形资产130,000 500 130,500 
经营租赁权使用资产9,385 — 9,385 
其他长期资产2,660 — 2,660 
应计费用及其他流动负债(43,966)(3,012)(46,978)
经营租赁负债流动部分(2,758)— (2,758)
租赁负债,除去当前部分(6,627)— (6,627)
递延税款负债(8,916)— (8,916)
封闭和事后责任— (1,025)(1,025)
其他长期负债(374)— (374)
可辨认净资产合计200,148 (2,814)197,334 
商誉195,265 (420)194,845 
总购买价格$395,413 $(3,234)$392,179 
其他无形资产的收购包括客户关系和商标/商号,预计平均使用寿命在之间。 和页面。20 ,具有约的加权平均使用寿命。 19购买总价的超额部分(包括超过公允价值的有形和无形资产的现金对价及负债承担)被记录为商誉。承认的商誉归因于公司预计从收购中实现的运营协同效应,组装的员工队伍和增长潜力。从收购中产生的商誉不可用于税务目的。
公司财务报表截至日期为的运营活动 2024年9月30日以及按照组合基础计算,假设该收购在2023年1月1日完成的形式财务收入和利润金额对公司未经审计的合并财务报表不重要。
2024年3月1日,公司以全现金购买价格收购了Noble Oil Services,Inc及其子公司(统称“Noble Oil”)为$$68.7 美元,净现金额。公司在2024年第二季度结算了该收购的营运资本并相应调整了购买价格。收购Noble Oil扩大了SKSS板块在美国东南地域板块的石油收集业务,同时还增加了被收购公司拥有和经营的再生油厂的增量生产。
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购价分配预计暂时,并基于对于于2024年3月1日资产和负债的公允价值的预估。公司仍在获取信息以完成这些余额的估价和相关的所得税会计。计量期调整将反映在收购日期存在的事实和情形方面获得的新信息。 以下表格总结了获取资产和承担负债的初步确定和确认(以千计)。
根据2024年3月31日报道的收购日(不应计入其他所有项目的除外)
收购日
如报告的
2024年9月30日
应收账款,包括未开票款项5,693 158 5,851 
存货和用品6,817 (219)6,598 
预付费用和其他流动资产423 (16)407 
资产:固定资产38,914 8,782 47,696 
许可证和其他无形资产20,200 (5,700)14,500 
经营租赁权使用资产3,615 — 3,615 
其他长期资产92 — 92 
应计费用及其他流动负债(8,990)97 (8,893)
经营租赁负债流动部分(1,823)— (1,823)
租赁负债,除去当前部分(1,792)— (1,792)
关闭和发帖后责任— (820)(820)
可辨认净资产合计63,149 2,282 65,431 
商誉5,744 (2,433)3,311 
总购买价格$68,893 $(151)$68,742 
其他无形资产包括客户关系和商标/商号,预计使用寿命为 和页面。15 年,加权平均使用寿命约为 13。超出购买总价的部分(包括超过有形和无形资产的公允价值和负债承担的总现金对价)被记录为商誉。确认的商誉可归因于公司预计从收购中实现的经营协同效应和组装工作人员。从收购中产生的商誉可用于税收目的。
公司财务报表截至日期为的运营活动 2024年9月30日以及按照组合基础计算,假设该收购在2023年1月1日完成的形式财务收入和利润金额对公司未经审计的合并财务报表不重要。
2023年的收购计划
2023年3月31日,公司以全现金购买价格$亿收购了Thompson Industrial Services, LLC(“Thompson Industrial”)。110.9 Thompson Industrial的运营扩大了环保母基服务板块在美国东南地区的工业服务业务。
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The Company finalized the purchase accounting for this acquisition in the first quarter of 2024. The allocation of the purchase price was based on estimates of the fair value and assets acquired and liabilities assumed as of March 31, 2023. The following table summarizes the final determination and recognition of assets acquired and liabilities assumed (in thousands):
At Acquisition Date As Reported December 31, 2023
Measurement Period Adjustments
Final Allocation
As Reported
September 30, 2024
Accounts receivable, including unbilled receivables$25,233 $(73)$25,160 
Inventories and supplies228 — 228 
Prepaid expenses and other current assets1,302 — 1,302 
Property, plant and equipment26,719 — 26,719 
Permits and other intangibles28,900 — 28,900 
Operating lease right-of-use assets4,716 — 4,716 
Other long-term assets72 — 72 
Accrued expenses and other current liabilities(10,385)(145)(10,530)
Current portion of operating lease liabilities(1,653)— (1,653)
Operating lease liabilities, less current portion(3,063)— (3,063)
Other long-term liabilities(560)— (560)
Total identifiable net assets71,509 (218)71,291 
Goodwill39,346 218 39,564 
Total purchase price$110,855 $ $110,855 
Permits and other intangible assets acquired include customer relationships, trademarks/tradenames and non-compete agreements and are anticipated to have estimated useful lives of between five and 15 years with a weighted average useful life of approximately 13 years. The excess of the total purchase price, which includes the aggregate cash consideration paid in excess of the fair value of the tangible and intangible assets acquired and liabilities assumed, was recorded as goodwill. The goodwill recognized is attributable to the operating synergies, assembled workforce and growth potential that the Company expects to realize from the acquisition. Goodwill generated from the acquisition is deductible for tax purposes.

(5) INVENTORIES AND SUPPLIES
Inventories and supplies consisted of the following (in thousands):
September 30, 2024December 31, 2023
Supplies$195,973 $177,217 
Oil and oil related products149,814 118,600 
Solvent and solutions12,788 11,795 
Other17,989 19,899 
Total inventories and supplies$376,564 $327,511 
Supplies inventories consist primarily of critical spare parts to support the Company’s incinerator and re-refinery operations and other general supplies used in our normal day-to-day operations. Other inventories consist primarily of parts washer components, cleaning fluids, absorbents and automotive fluids, such as windshield washer fluid and antifreeze.

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(6) PROPERTY, PLANT AND EQUIPMENT
Property, plant and equipment consisted of the following (in thousands):
September 30, 2024December 31, 2023
Land$186,984 $174,891 
Asset retirement costs (non-landfill)28,935 27,167 
Landfill assets259,233 253,180 
Buildings and improvements (1)
649,401 630,525 
Vehicles (2)
1,430,325 1,276,567 
Equipment (3)
2,453,616 2,388,370 
Construction in progress316,666 213,601 
5,325,160 4,964,301 
Less - accumulated depreciation and amortization2,872,848 2,770,983 
Total property, plant and equipment, net$2,452,312 $2,193,318 
________________
(1) Balances inclusive of gross right-of-use (“ROU”) assets classified as finance leases of $8.0 million in both periods.
(2) Balances inclusive of gross ROU assets classified as finance leases of $208.7 million and $151.7 million, respectively.
(3) Balances inclusive of gross ROU assets classified as finance leases of $9.3 million and $9.2 million, respectively.
Depreciation expense, inclusive of landfill and finance lease amortization, was $86.2 million and $254.9 million for the three and nine months ended September 30, 2024, respectively. Depreciation expense, inclusive of landfill and finance lease amortization, was $80.4 million and $229.7 million for the three and nine months ended September 30, 2023, respectively. The Company recorded $3.3 million and $8.6 million of capitalized interest during the three and nine months ended September 30, 2024, respectively. The Company recorded $1.7 million and $4.4 million of capitalized interest during the three and nine months ended September 30, 2023, respectively. Capitalized interest in the periods presented is primarily attributable to the construction of a new incinerator in Kimball, Nebraska.

(7) GOODWILL AND OTHER INTANGIBLE ASSETS
The changes in goodwill by segment for the nine months ended September 30, 2024 were as follows (in thousands):
Environmental ServicesSafety-Kleen Sustainability SolutionsTotals
Balance at January 1, 2024$1,112,013 $175,723 $1,287,736 
Increase from current period acquisitions194,845 3,311 198,156 
Measurement period adjustments from prior period acquisitions218  218 
Foreign currency translation(745)(300)(1,045)
Balance at September 30, 2024$1,306,331 $178,734 $1,485,065 
The Company assesses goodwill on an annual basis as of December 31 or at an interim date when events or changes in the business environment (“triggering events”) would more likely than not reduce the fair value of a reporting unit below its carrying value. During the period ended September 30, 2024, no such triggering events were identified.
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As of September 30, 2024 and December 31, 2023, the Company’s intangible assets consisted of the following (in thousands):
September 30, 2024December 31, 2023
CostAccumulated
Amortization
NetCostAccumulated
Amortization
Net
Permits$193,201 $123,335 $69,866 $191,747 $117,556 $74,191 
Customer and supplier relationships
697,295 249,215 448,080 604,994 258,879 346,115 
Other intangible assets
114,112 43,210 70,902 100,068 37,862 62,206 
Total amortizable permits and other intangible assets
1,004,608 415,760 588,848 896,809 414,297 482,512 
Trademarks and trade names
120,087 — 120,087 120,285 — 120,285 
Total permits and other intangible assets
$1,124,695 $415,760 $708,935 $1,017,094 $414,297 $602,797 
Amortization expense of permits, customer and supplier relationships and other intangible assets was $13.9 million and $40.7 million in the three and nine months ended September 30, 2024, respectively. Amortization expense of permits, customer and supplier relationships and other intangible assets was $12.5 million and $37.8 million in the three and nine months ended September 30, 2023, respectively.
The expected amortization of the net carrying amount of finite-lived intangible assets at September 30, 2024 was as follows (in thousands):
Years Ending December 31,Expected Amortization
2024 (three months)$13,608 
202557,103 
202650,813 
202748,308 
202846,836 
Thereafter372,180 
$588,848 

(8) ACCRUED EXPENSES AND OTHER CURRENT LIABILITIES
Accrued expenses and other current liabilities consisted of the following (in thousands):
September 30, 2024December 31, 2023
Accrued compensation and benefits$117,526 $113,236 
Accrued insurance106,906 107,658 
Accrued income, real estate, sales and other taxes60,547 44,752 
Accrued interest14,799 33,857 
Accrued other98,458 97,654 
$398,236 $397,157 

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(9) CLOSURE AND POST-CLOSURE LIABILITIES
The changes to closure and post-closure liabilities (also referred to as “asset retirement obligations”) from January 1, 2024 through September 30, 2024 were as follows (in thousands):
Landfill
Retirement
Liability
Non-Landfill
Retirement
Liability
Total
Balance at January 1, 2024$59,443 $59,157 $118,600 
Liabilities assumed in acquisitions 1,845 1,845 
New asset retirement obligations4,093  4,093 
Accretion3,915 3,305 7,220 
Changes in estimates recorded to consolidated statement of operations(134)(120)(254)
Changes in estimates recorded to consolidated balance sheet46 39 85 
Expenditures(8,728)(3,128)(11,856)
Currency translation and other(81)(74)(155)
Balance at September 30, 2024$58,554 $61,024 $119,578 
In the nine months ended September 30, 2024, there were no significant benefits or charges resulting from changes in estimates for closure and post-closure liabilities.

(10) REMEDIAL LIABILITIES 
The changes to remedial liabilities from January 1, 2024 through September 30, 2024 were as follows (in thousands):
Remedial
Liabilities for
Landfill Sites
Remedial
Liabilities for
Inactive Sites
Remedial
Liabilities
(Including
Superfund) for
Non-Landfill
Operations
Total
Balance at January 1, 2024$1,880 $60,277 $49,086 $111,243 
Accretion69 1,719 1,131 2,919 
Changes in estimates recorded to consolidated statement of operations24 614 3,963 4,601 
Expenditures(40)(2,944)(4,839)(7,823)
Currency translation and other (11)(271)(282)
Balance at September 30, 2024$1,933 $59,655 $49,070 $110,658 
In the nine months ended September 30, 2024, changes in estimates for remedial liabilities included a $2.9 million reserve increase related to new information on the ultimate remediation of an existing Superfund site.

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(11) FINANCING ARRANGEMENTS
Long-Term Debt
The following table is a summary of the Company’s long-term debt (in thousands):
Current Portion of Long-Term Debt:September 30, 2024December 31, 2023
Secured senior term loans$15,102 $10,000 
Long-Term Debt:
Secured senior term loans due October 8, 20281,453,571 970,000 
Unsecured senior notes, at 4.875%, due July 15, 2027 (“2027 Notes”)
545,000 545,000 
Unsecured senior notes, at 5.125%, due July 15, 2029 (“2029 Notes”)
300,000 300,000 
Unsecured senior notes, at 6.375%, due February 1, 2031 (“2031 Notes”)
500,000 500,000 
Long-term debt, at par$2,798,571 $2,315,000 
Unamortized debt issuance costs and discount(24,912)(23,283)
Long-term debt, at carrying value$2,773,659 $2,291,717 
Financing Activities
The Company’s significant financing arrangements are described in Note 12, “Financing Arrangements,” in the Company’s Annual Report on Form 10-K for the year ended December 31, 2023 and, other than as noted below, there have been no material changes to the arrangements described therein.
On June 28, 2024, the Company and one of the Company’s Canadian subsidiaries (the “Canadian Borrower”) entered into a seventh amended and restated credit agreement (the “Amended Credit Agreement”) with Bank of America, N.A., as administrative agent, and the lenders party to the Amended Credit Agreement. The Amended Credit Agreement amended and restated the sixth amended and restated credit agreement dated October 28, 2020 (the “Prior Credit Agreement”).
Under the Amended Credit Agreement, the Company has the right to obtain revolving loans and letters of credit for a combined maximum of up to $550.0 million (with a sub-limit of $250.0 million for letters of credit) and the Canadian Borrower has the right to obtain revolving loans and letters of credit for a combined maximum of up to $50.0 million. The maximum borrowing amount of $600.0 million under the Amended Credit Agreement is increased from $400.0 million under the Prior Credit Agreement.
Borrowings by the Company under the Amended Credit Agreement will bear interest at the Company’s option, at either (i) the sum of Term SOFR plus a SOFR Adjustment of 0.1% plus 1.5% per annum, or (ii) the U.S. Base Rate, plus 0.5% per annum, and borrowings by the Canadian Borrower will bear interest, at the Company’s option, at either (i) the sum of Term CORRA plus a Term CORRA adjustment of either 0.29547% or 0.32138% for the one or three month interest period respectively, plus 1.5% per annum, (ii) the Canadian Prime Rate, plus 0.5% per annum, or (iii) the Canadian Base Rate, plus 0.5% per annum, as those terms are defined in the Amended Credit Agreement. Other terms under the Amended Credit Agreement are substantially the same as under the Prior Credit Agreement. Subject to certain customary conditions, the facility will expire on June 28, 2029.
The Company had no outstanding loan balance under the Amended Credit Agreement as of the date of the amendment discussed above, September 30, 2024 or December 31, 2023. As of September 30, 2024, the Company had $469.8 million available to borrow under the revolving credit facility and outstanding letters of credit were $130.2 million.
On March 22, 2024, the Company and substantially all of the Company’s domestic subsidiaries entered into Incremental Facility Amendment No. 5 to the Company’s existing Credit Agreement, dated as of June 30, 2017 (“Term Loan Agreement”). Incremental Facility Amendment No. 5 provided for the incurrence of additional term loans (the “2024 Incremental Term Loans”) under the Term Loan Agreement in the aggregate principal amount of $500.0 million. Proceeds from the issuance of the 2024 Incremental Term Loans were $491.1 million after debt discount and debt issuance costs, and were used to fund the acquisition of HEPACO, with the excess increasing the Company’s cash balances. The 2024 Incremental Term Loans are in addition to the aggregate of $980.0 million of term loans (the “Existing Term Loans”) which were outstanding prior to the issuance of the 2024 Incremental Term Loans. Both the 2024 Incremental Term Loans and the Existing Term Loans (collectively referred to as the “2028 Term Loans”) will mature on October 8, 2028, and may be prepaid at any time without premium or penalty other than customary breakage costs. The Company’s obligations under the 2028 Term Loans are guaranteed by substantially all of the Company’s domestic restricted subsidiaries and secured by liens on substantially all of the assets of the Company and the guarantors.
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The 2028 Term Loans bear interest, at the Company’s election, at either of the following rates: (a) the sum of the Term SOFR Rate (as defined in the Term Loan Agreement) plus 0.11448% (the one-month Term SOFR adjustment) plus a 1.75% margin per annum, or (b) the sum of the Base Rate (as defined in the Term Loan Agreement) plus 0.75% margin per annum. The Term SOFR rate is subject to a floor of 0.00% and the Base Rate is subject to a floor of 1.00%. The Company has elected one-month Term SOFR for interest payments on that debt; however, the Term Loan Agreement provides for Term SOFR adjustments for other interest periods. Interest on the 2028 Term Loans is paid monthly with interest payments on the 2024 Incremental Term Loan portion having commenced in April 2024.
As of September 30, 2024 and December 31, 2023, the estimated fair value of the Company’s outstanding long-term debt, including the current portion, was $2.8 billion and $2.3 billion, respectively. The Company’s estimates of fair value of its long-term debt, including the current portion, are based on quoted market prices or other available market data which are considered Level 2 measures according to the fair value hierarchy. Level 2 utilizes quoted market prices in markets that are not active, broker or dealer quotation or alternative pricing sources with reasonable levels of price transparency for similar assets and liabilities.
As of September 30, 2024, after taking into account the interest rate swaps discussed under the “Cash Flow Hedges” heading below, the Company’s variable rate debt consisted of $868.7 million of the 2028 Term Loans. The Company’s interest rate on this variable rate debt as of September 30, 2024 was 7.06%.
On October 8, 2024, the Company and substantially all of the Company’s domestic subsidiaries entered into Amendment No. 6 (the “Sixth Amendment”) to the Term Loan Agreement. The Sixth Amendment (i) eliminated the Term SOFR Adjustment (noted above as 0.11448% per annum) and (ii) resets the six month soft call period for a repricing of the 2028 Term Loans. After giving effect to the repricing, the applicable interest rate margins for the 2028 Term Loans are 1.75% for Term SOFR borrowings and 0.75% for base rate borrowings. Under the Sixth Amendment the 2028 Term Loans may be prepaid at any time without premium or penalty other than customary breakage costs or if the Company engages in certain repricing transactions before April 8, 2025, in which event a 1% prepayment premium would be due.
Cash Flow Hedges        
The Company’s strategy to hedge against fluctuations in variable interest rates involves entering into interest rate derivative agreements.
The Company has entered into interest rate swap agreements with a notional amount of $600.0 million (“2022 Swaps”) to effectively fix the interest rate on $600.0 million principal of the outstanding existing Term Loans. The fixed rate on these instruments is 1.9645% and the variable rate is linked to the Term SOFR to mirror the variable interest payments for the Term Loans. For the nine months ended September 30, 2024, including the 1.75% interest rate margin and the 0.11448% SOFR adjustment for the Term Loans, the effective annual interest rate of this $600.0 million of principal debt was approximately 3.83%. Following the Sixth Amendment, which eliminated the 0.11448% SOFR adjustment, the effective annual rate on the $600.0 million of principal is approximately 3.71%.
Prior to the phase-out of LIBOR as a referenced rate on June 30, 2023, the fixed rate on the 2022 Swaps was 0.931% and the variable rate was linked to LIBOR, to mirror the LIBOR linked variable interest payments for the existing Term Loans. With the then 2.00% interest rate margin for the existing Term Loans, the effective annual interest rate of the $600.0 million of principal debt was 2.931% through June 30, 2023. The 2022 Swaps will expire on September 30, 2027.
At the inception of these instruments, the Company designated the 2022 Swaps as cash flow hedges. As of September 30, 2024, the Company recorded a derivative asset with a fair value of $23.3 million related to the 2022 Swaps. The balance of the derivative asset as of December 31, 2023 was $35.5 million. These assets are included in Other long-term assets on the consolidated balance sheets.
No ineffectiveness has been identified on the 2022 Swaps and, therefore the change in fair value is recorded in stockholders’ equity as a component of accumulated other comprehensive loss. Amounts are reclassified from accumulated other comprehensive loss into interest expense on the unaudited consolidated statement of operations in the same period or periods during which the hedged transactions affect earnings.

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(12) EARNINGS PER SHARE     
The computation of basic earnings per share (EPS) is based on the weighted-average number of common shares outstanding. The computation of diluted EPS is based on the weighted-average number of common shares outstanding and potential dilutive common shares during the period as determined by using the treasury stock method.
The following are computations of basic and diluted earnings per share (in thousands, except per share amounts):
Three Months EndedNine Months Ended
 September 30,September 30,
 2024202320242023
Numerator for basic and diluted earnings per share:
Net income$115,213 $91,340 $318,325 $279,507 
Denominator:
Weighted-average shares outstanding, basic53,951 54,122 53,936 54,097 
Dilutive impact of equity awards278 297 293 314 
Weighted-average shares outstanding, diluted
54,229 54,419 54,229 54,411 
Basic earnings per share:$2.14 $1.69 $5.90 $5.17 
Diluted earnings per share:$2.12 $1.68 $5.87 $5.14 
Potentially dilutive shares outstanding include the dilutive effect of unvested restricted stock awards and employee stock purchase plan (“ESPP”) rights (collectively referred to as “equity awards”). Potentially dilutive shares whose effect would have been antidilutive are excluded from the computation of diluted earnings per share. The Company included all outstanding performance awards, restricted stock awards and ESPP rights in the calculation of diluted earnings per share except as shown in the table below (in thousands):
 Three Months Ended September 30,Nine Months Ended September 30,
2024202320242023
Antidilutive restricted stock awards5 7 6 14 
Performance stock awards for which performance criteria was not attained at reporting date160 103 160 103 

(13) ACCUMULATED OTHER COMPREHENSIVE LOSS
The changes in accumulated other comprehensive loss by component and related tax impacts for the nine months ended September 30, 2024 were as follows (in thousands):
Foreign Currency Translation
Adjustments
Unrealized (Loss) Gain on Available-For-Sale Securities
Unrealized Gain on Fair Value of Interest Rate HedgesUnrealized Loss on PensionTotal
Balance at January 1, 2024$(200,339)$(4)$25,891 $(887)$(175,339)
Other comprehensive (loss) income before reclassifications(8,031)215 3,296 18 (4,502)
Amounts reclassified out of accumulated other comprehensive loss  (15,424) (15,424)
Tax (provision) benefit (45)3,274  3,229 
Other comprehensive (loss) income(8,031)170 (8,854)18 (16,697)
Balance at September 30, 2024$(208,370)$166 $17,037 $(869)$(192,036)
The amount realized in the unaudited consolidated statement of operations during the three and nine months ended September 30, 2024 which was reclassified out of accumulated other comprehensive loss was as follows (in thousands):
Component of Accumulated Other Comprehensive LossThree Months Ended September 30, 2024Nine Months Ended September 30, 2024Location
Unrealized Gain on Fair Value of Interest Rate Hedges$5,213 $15,424 Interest expense, net of interest income
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(14) STOCK-BASED COMPENSATION
Total stock-based compensation cost recognized for the three and nine months ended September 30, 2024 was $5.8 million and $20.7 million, respectively. Total stock-based compensation cost recognized for the three and nine months ended September 30, 2023 was $4.3 million and $14.8 million, respectively. The total income tax benefit recognized in the unaudited consolidated statements of operations from stock-based compensation expense for the three and nine months ended September 30, 2024 was $1.0 million and $3.7 million, respectively. The total income tax benefit recognized in the unaudited consolidated statements of operations from stock-based compensation expense for the three and nine months ended September 30, 2023 was $0.7 million and $2.4 million, respectively.
Restricted Stock Awards
The following table summarizes information about restricted stock awards for the nine months ended September 30, 2024:
Restricted StockNumber of SharesWeighted Average
Grant-Date
Fair Value
Balance at January 1, 2024414,623 $114.02 
Granted144,341 187.87 
Vested(130,495)102.40 
Forfeited(21,578)143.28 
Balance at September 30, 2024406,891 $142.39 
As of September 30, 2024, there was $43.8 million of total unrecognized compensation cost arising from restricted stock awards. This cost is expected to be recognized over a weighted average period of 2.9 years. The total fair value of restricted stock vested during the three and nine months ended September 30, 2024 was $16.3 million and $27.2 million, respectively. The total fair value of restricted stock vested during the three and nine months ended September 30, 2023 was $16.6 million and $24.6 million, respectively.
Performance Stock Awards
Performance stock awards are subject to performance criteria established by the Compensation and Human Capital Committee of the Company’s Board of Directors prior to or at the date of grant. The performance stock awards are earned based on achieving certain revenue, Adjusted EBITDA Margin, Return on Invested Capital and Total Recordable Incident Rate targets set forth in the applicable award agreements. Performance stock awards include continued service conditions through vesting.
The following table summarizes information about performance stock awards for the nine months ended September 30, 2024:
Performance StockNumber of SharesWeighted Average
Grant-Date
Fair Value
Balance at January 1, 2024181,284 $114.10 
Granted79,738 173.45 
Vested(29,358)100.63 
Forfeited(4,800)148.48 
Balance at September 30, 2024226,864 $135.98 
As of September 30, 2024, there was $6.8 million of total unrecognized compensation cost arising from performance stock awards achieved or deemed probable of vesting. The total fair value of performance awards vested during the three and nine months ended September 30, 2024 was $2.6 million and $6.3 million. The total fair value of performance awards vested during the three and nine months ended September 30, 2023 was $1.7 million and $9.6 million, respectively.

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Employee Stock Purchase Plan
On May 22, 2024, the Company’s shareholders approved the Clean Harbors Employee Stock Purchase Plan (the “ESPP”). The ESPP provides a means for eligible employees of the Company to authorize after-tax payroll deductions on a voluntary basis to be used for the periodic purchase of the Company's common stock at a 10% discount to its fair market value. The purchase price paid by the employees will be 90% of the lower of the closing price of the Company's common stock on (i) the first trading day of the offering period or (ii) the last trading day of the offering period. A total of 500,000 shares of common stock are reserved for issuance under the ESPP. As of September 30, 2024, no shares have been issued under the plan.

(15) COMMITMENTS AND CONTINGENCIES
The Company and its subsidiaries are subject to legal proceedings and claims arising in the ordinary course of business. Actions filed against the Company arise from commercial and employment-related claims including alleged class actions related to sales practices and wage and hour claims. The plaintiffs in these actions may be seeking damages or injunctive relief or both. These actions are in various jurisdictions and stages of proceedings, and some are covered in part by insurance. In addition, the Company’s waste management services operations are regulated by federal, state, provincial and local laws enacted to regulate discharge of materials into the environment, remediation of contaminated soil and groundwater or otherwise protect the environment. This ongoing regulation results in the Company frequently becoming a party to legal or administrative proceedings involving all levels of government authorities and other interested parties. The issues involved in such proceedings generally relate to alleged violations of existing permits and licenses or alleged responsibility under federal or state Superfund laws to remediate contamination at properties owned either by the Company or by other parties (“third-party sites”) to which either the Company or the prior owners of certain of the Company’s facilities shipped waste.
At September 30, 2024 and December 31, 2023, the Company had recorded reserves of $32.7 million and $32.4 million, respectively, for actual or probable liabilities related to the legal and administrative proceedings in which the Company was then involved, the principal of which are described below. As of September 30, 2024 and December 31, 2023, the $32.7 million and $32.4 million, respectively, of reserves consisted of (i) $26.1 million and $25.0 million, respectively, related to pending legal or administrative proceedings, including Superfund liabilities, which were included in remedial liabilities on the consolidated balance sheets, and (ii) $6.6 million and $7.4 million, respectively, primarily related to federal, state and provincial enforcement actions, which were included in accrued expenses on the consolidated balance sheets.
In management’s opinion, it is not reasonably possible that the potential liability beyond what has been recorded, if any, that may result from these actions, either individually or collectively, will have a material effect on the Company’s financial position, results of operations or cash flows. The Company periodically adjusts the aggregate amount of these reserves when actual or probable liabilities are paid or otherwise discharged, new claims arise, or additional relevant information about existing or probable claims becomes available.
Legal or Administrative Proceedings
As of September 30, 2024, the principal legal and administrative proceedings in which the Company was involved, or which had been terminated during 2024, relate to Safety-Kleen product liability cases and Superfund proceedings.
Safety-Kleen Product Liability Cases: Safety-Kleen, Inc. (“Safety-Kleen”), which is a legal entity acquired by the Company in 2012, has been named as a defendant in certain product liability cases that are currently pending in various courts and jurisdictions throughout the United States. As of September 30, 2024, there were approximately 71 proceedings (excluding cases which have been settled but not formally dismissed) wherein persons claim personal injury resulting from the use of Safety-Kleen’s parts cleaning equipment or cleaning products. These proceedings typically involve allegations that the solvent used in Safety-Kleen’s parts cleaning equipment contains contaminants and/or that Safety-Kleen’s recycling process does not effectively remove the contaminants that become entrained in the solvent during their use. In addition, certain claimants assert that Safety-Kleen failed to warn adequately the product user of potential risks, including a historic failure to warn that solvent contains trace amounts of toxic or hazardous substances such as benzene.
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The Company maintains insurance that it believes will provide coverage for these product liability claims (over amounts accrued for self-insured retentions and deductibles in certain limited cases), except for punitive damages to the extent not insurable under state law or excluded from insurance coverage. The Company historically has vigorously defended, and intends to continue to vigorously defend, itself and the safety of its products against all of these claims. Such matters are subject to many uncertainties and outcomes are not predictable with assurance. Consequently, the Company is unable to ascertain the ultimate aggregate amount of monetary liability or financial impact with respect to these matters as of September 30, 2024. From January 1, 2024 to September 30, 2024, 14 product liability claims were settled or dismissed. Due to the nature of these claims and the related insurance, the Company did not incur any expense as insurance provided coverage in full for all such claims. Safety-Kleen may be named in similar, additional lawsuits in the future, including claims for which insurance coverage may not be available.
Superfund Proceedings: The Company has been notified that either the Company or the prior owners of certain facilities the Company has since acquired have been identified as potentially responsible parties (“PRPs”) or potential PRPs of indemnification obligations in connection with 131 sites which are subject to or are proposed to become subject to proceedings under federal or state Superfund laws. Of the 131 Superfund related sites, six involve facilities that are now owned or leased by the Company and 125 involve third-party sites which received waste potentially shipped by the Company or the prior owners of certain facilities the Company has since acquired. Of the 125 third-party sites, 30 are now settled, 13 are currently requiring expenditures on remediation and 82 are not currently requiring expenditures on remediation.
In connection with each site, the Company has estimated the extent, if any, to which it may be subject, either directly or as a result of any indemnification obligations, for cleanup and remediation costs, related legal and consulting costs associated with PRP investigations, settlements and related legal and administrative proceedings. The amount of such actual and potential liability is inherently difficult to estimate because of, among other relevant factors, uncertainties as to the legal liability (if any) of the Company or the prior owners of certain of the Company’s facilities to contribute a portion of the cleanup costs, the assumptions that must be made in calculating the estimated cost and timing of remediation, the identification of other PRPs and their respective capability and obligation to contribute to remediation efforts and the existence and legal standing of indemnification agreements (if any) with prior owners, which may either benefit the Company or subject the Company to potential indemnification obligations. The Company believes its potential monetary liability could exceed $1.0 million at three of the 131 Superfund related sites.
Of the 125 third-party sites at which the Company has been notified it is a PRP or potential PRP or may have indemnification obligations, the Company has indemnification agreements at a total of 17 sites. These agreements indemnify the Company with respect to any liability at the 17 sites for waste disposed prior to the Company’s acquisition of the former subsidiaries of Waste Management, Inc. and McKesson Corporation which had shipped waste to those sites. Accordingly, the indemnifying parties are paying all costs of defending those subsidiaries in those 17 cases, including legal fees and settlement costs. However, there can be no guarantee that the Company’s ultimate liabilities for those sites will not exceed the amount recorded or that indemnities applicable to any of these sites will be available to pay all or a portion of related costs. Except for those indemnification agreements discussed, the Company does not have an indemnity agreement with respect to any of the 125 third-party sites discussed above.
Federal, State and Provincial Enforcement Actions
From time to time, the Company pays fines or penalties in regulatory proceedings relating primarily to waste treatment, storage or disposal facilities. As of September 30, 2024, there was one proceeding for which the Company believed it was possible that the sanctions could equal or exceed $1.0 million. As of December 31, 2023, there were no proceedings for which the Company believed it was possible that the sanctions could equal or exceed $1.0 million. As of the date of these financial statements, the Company believes that the fines or other penalties in this or any of the other regulatory proceedings will, individually or in the aggregate, not have a material effect on its financial condition, results of operations or cash flows.

(16) SEGMENT REPORTING 
Segment reporting is prepared on the same basis that the Company’s chief operating decision maker (“CODM”), which is a committee comprised of the Company’s Co-Chief Executive Officers, manages the business, makes operating decisions and assesses performance. The Company is managed and reports as two operating segments; (i) the Environmental Services segment and (ii) the Safety-Kleen Sustainability Solutions segment.
Third-party revenue is revenue billed to outside customers by a particular segment. Direct revenue is revenue allocated to the segment providing the product or service. Intersegment revenues represent the sharing of third-party revenues among the segments based on products and services provided by each segment as if the products and services were sold directly to the third-party. The intersegment revenues are shown net. The operations not managed through the Company’s operating segments described above are recorded as “Corporate Items.”
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The following tables reconcile third-party revenues to direct revenues for the three and nine months ended September 30, 2024 and 2023 (in thousands):
Three Months EndedThree Months Ended
September 30, 2024September 30, 2023
Third-Party RevenuesIntersegment Revenues (Expenses), netDirect RevenuesThird-Party RevenuesIntersegment Revenues (Expenses), netDirect Revenues
Environmental Services$1,287,650 $9,537 $1,297,187 $1,135,279 $11,084 $1,146,363 
Safety-Kleen Sustainability Solutions241,676 (9,537)232,139 230,305 (11,084)219,221 
Corporate Items96 — 96 112 — 112 
Total$1,529,422 $— $1,529,422 $1,365,696 $— $1,365,696 
Nine Months EndedNine Months Ended
September 30, 2024September 30, 2023
Third-Party RevenuesIntersegment Revenues (Expenses), netDirect RevenuesThird-Party RevenuesIntersegment Revenues (Expenses), netDirect Revenues
Environmental Services$3,746,227 $32,853 $3,779,080 $3,357,743 $31,397 $3,389,140 
Safety-Kleen Sustainability Solutions712,312 (32,853)679,459 712,905 (31,397)681,508 
Corporate Items297 — 297 335 — 335 
Total$4,458,836 $— $4,458,836 $4,070,983 $— $4,070,983 
The primary financial measure by which the Company evaluates the performance of its segments is Adjusted EBITDA, which consists of net income plus accretion of environmental liabilities, stock-based compensation, depreciation and amortization, net interest expense, loss on early extinguishment of debt and provision for income taxes and excludes other gains, losses and non-cash charges not deemed representative of fundamental segment results and other expense (income), net. Transactions between the segments are accounted for at the Company’s best estimate based on similar transactions with outside customers.
The following table presents Adjusted EBITDA information used by management by reported segment (in thousands):
 Three Months EndedNine Months Ended
September 30,September 30,
 2024202320242023
Adjusted EBITDA:  
Environmental Services$332,502 $288,982 $956,892 $822,949 
Safety-Kleen Sustainability Solutions41,226 31,146 122,402 126,024 
Corporate Items(71,914)(65,111)(219,569)(191,312)
Total301,814 255,017 859,725 757,661 
Reconciliation to Consolidated Statements of Operations:  
Accretion of environmental liabilities3,618 3,388 10,139 10,281 
Stock-based compensation5,837 4,291 20,690 14,809 
Depreciation and amortization100,063 92,970 295,632 267,425 
Income from operations192,296 154,368 533,264 465,146 
Other expense (income), net1,123 (334)2,431 833 
Loss on early extinguishment of debt
   2,362 
Interest expense, net of interest income35,779 29,696 100,767 80,400 
Income before provision for income taxes$155,394 $125,006 $430,066 $381,551 

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ITEM 2.    MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS 
Forward-Looking Statements 
In addition to historical information, this Quarterly Report on Form 10-Q contains forward-looking statements, which are generally identifiable by use of the words “believes,” “expects,” “intends,” “anticipates,” “plans to,” “seeks,” “should,” “estimates,” “projects,” “may,” “likely,” “potential” or similar expressions. Such statements may include, but are not limited to, statements about the Company’s future financial and operating results, plans, strategy, objectives and goals, cost management initiatives, contingent liabilities, liquidity, business and market conditions, customer demand, acquisitions, growth opportunities, expectations and other statements that are not historical facts. Such statements are based upon the beliefs and expectations of Clean Harbors’ management as of the date of this report only and are subject to certain risks and uncertainties that could cause actual results to differ materially, including, without limitation, risks and uncertainties and those items identified as “Risk Factors” in our Annual Report on Form 10-K filed with the Securities and Exchange Commission (“SEC”) on February 21, 2024, and in other documents we file from time to time with the SEC. Forward-looking statements are neither historical facts nor assurances of future performance. Therefore, readers are cautioned not to place undue reliance on these forward-looking statements, which reflect management’s opinions only as of the date hereof. Our actual results and financial condition may differ materially from those indicated in the forward-looking statements. We undertake no obligation to revise or publicly release the results of any revision to these forward-looking statements.
Overview
We are North America’s leading provider of environmental and industrial services, supporting our customers in finding environmentally responsible solutions to further their sustainability goals in today’s world. Everywhere industry meets the environment, we strive to provide eco-friendly products and services that protect and restore North America’s natural environment. We believe we operate, in the aggregate, the largest number of hazardous waste incinerators, landfills and treatment, storage and disposal facilities (“TSDFs”) in North America. We serve over 300,000 customers, including the majority of Fortune 500 companies, across various markets including chemical and manufacturing, as well as numerous government agencies. These customers rely on us to safely deliver a broad range of services including but not limited to end-to-end hazardous waste management, emergency response, industrial cleaning and maintenance and recycling services. We are also a leading provider of parts cleaning and related environmental services to general manufacturing, automotive and commercial customers in North America and the largest re-refiner and recycler of used oil in North America, offering a unique closed-loop re-refining process that helps customers achieve their sustainability goals.
Performance of our segments is evaluated on several factors of which the primary financial measure is Adjusted EBITDA, which is reconciled to our net income and described more fully below. The following is a discussion of how management evaluates its segments using other factors, including key performance indicators that management uses to assess the segments’ results, as well as certain macroeconomic trends and influences that impact each reportable segment:
Environmental Services - Environmental Services segment results are predicated upon the demand by our customers for our wide variety of services, waste volumes managed by delivering such services and project work for which responsible waste handling and/or disposal is required. Environmental Services results are also impacted by the demand for planned and unplanned industrial related cleaning and maintenance services at customer sites, environmental cleanup services on a scheduled or emergency basis, including response to large scale events such as major chemical spills, natural disasters, or other instances where immediate and specialized services are required. The Environmental Services segment results include the Safety-Kleen branches’ core environmental service offerings of containerized waste disposal, parts washer and vacuum services. These results are driven by the volumes of waste collected from these customers, the overall number of parts washers placed at customer sites and the demand for and frequency of other offered services. The results and integration of the acquired operations of HEPACO Blocker, Inc. and its subsidiaries (collectively “HEPACO”) also impact the overall segment results. In managing the business and evaluating performance, management tracks the volumes and mix of waste handled and disposed of or recycled, generally through our incinerators, TSDFs and landfills, the utilization rates of our incinerators, equipment and workforce, including billable hours and the number of parts washer services performed, and pricing realized by our business and peer companies as well as other key metrics. Levels of activity and ultimate performance associated with this segment can be impacted by several factors including overall North American GDP, U.S. industrial production, economic conditions in the general manufacturing, chemical and automotive markets, including efforts and economic incentives to increase domestic operations, available capacity at waste disposal outlets, weather conditions, efficiency of our operations, technology, changing regulations, competition, market pricing of our services, costs incurred to deliver our services and the management of our related operating costs.
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Safety-Kleen Sustainability Solutions - Safety-Kleen Sustainability Solutions (“SKSS”) offers high quality, environmentally responsible recycled base and blended oil products and other automotive and industrial lubricants to fleet customers, distributors, manufacturers of oil products and industrial plants. Segment results are impacted by market pricing, overall market demand and mix of our oil products sales, with management’s objective being to limit exposure to commodity market pricing risk through increased production of value added blended lubricants and contracted rate supply agreements with customers. Segment results are also predicated on the demand for other SKSS product and service offerings including collection services for used oil, used oil filters and other automotive fluids. The used oil collected is used as feedstock in our oil re-refining to produce our base and blended oil products and other hydraulic oils, lubricants and recycled fuel oil or are integrated into our recycling and disposal network. The results and integration of the acquired operations of Noble Oil Services, Inc. and its subsidiaries (collectively “Noble”) also impact the overall segment results. In operating the business and evaluating performance, management tracks the volumes and relative percentages of base and blended oil sales along with various pricing metrics associated with the commodity driven margin between product pricing and the overall costs to collect used oil. Levels of activity and ultimate performance associated with this segment can be impacted by economic conditions and product demand in the manufacturing and automotive services markets, product pricing, efficiency of our operations, partnerships, technology, weather conditions, changing regulations, competition and the management of our related operating costs. Costs incurred in connection with the collection of used oil and other raw materials associated with the segment’s oil related products can also be volatile and can be impacted by global events and their relative impact on commodity products and pricing. The overall market price of oil and regulations that change the possible usage of used oil or burning of used oil as a fuel, impact the premium the segment can charge for used oil collections.
Highlights
Total direct revenues for the three and nine months ended September 30, 2024 were $1,529.4 million and $4,458.8 million, compared with $1,365.7 million and $4,071.0 million for the three and nine months ended September 30, 2023. Our Environmental Services segment direct revenues increased $150.8 million and $389.9 million or 13.2% and 11.5% for the three and nine months ended September 30, 2024, respectively, from the comparable periods in 2023 driven by growth in Field and Emergency Response Services, including the contributions from the acquisition of HEPACO, Technical Services and Safety-Kleen core service offerings. For the three months ended September 30, 2024, our SKSS segment direct revenues increased $12.9 million or 5.9%, from the comparable period in 2023, driven by contributions from our acquisition of Noble. For the nine months ended September 30, 2024, SKSS segment direct revenues decreased $2.0 million or 0.3% from the comparable period in 2023, due to lower base and blended oil product revenues resulting from market-driven pricing and lower volumes of base oil sold partially offset by contributions from Noble Oil. Foreign currency translation of our Canadian operations negatively impacted our consolidated direct revenues by $2.8 million and $5.3 million in the three and nine months ended September 30, 2024, respectively, compared to the same periods in 2023.
Income from operations for the three and nine months ended September 30, 2024 was $192.3 million and $533.3 million, compared with $154.4 million and $465.1 million in the three and nine months ended September 30, 2023, representing an increase of 24.6% and 14.6%, respectively. Net income for the three and nine months ended September 30, 2024 was $115.2 million and $318.3 million, compared with net income of $91.3 million and $279.5 million in the three and nine months ended September 30, 2023, representing an increase of 26.1% and 13.9%, respectively.
Adjusted EBITDA, which is the primary financial measure by which we evaluate our segments, increased $46.8 million or 18.4% from $255.0 million in the three months ended September 30, 2023 to $301.8 million in the three months ended September 30, 2024. Adjusted EBITDA increased $102.1 million or 13.5% from $757.7 million in the nine months ended September 30, 2023 to $859.7 million in the nine months ended September 30, 2024. This Adjusted EBITDA growth is primarily driven by contributions from the Environmental Services Segment. Additional information regarding Adjusted EBITDA, which is a non-GAAP measure, including a reconciliation of net income to Adjusted EBITDA, appears below under “Adjusted EBITDA.”
Net cash from operating activities for the nine months ended September 30, 2024 increased $18.1 million from $455.7 million in 2023 to $473.8 million in 2024. Adjusted free cash flow, which management uses to measure our financial strength and ability to generate cash, decreased $38.6 million in the nine months ended September 30, 2024 as compared to 2023. The decrease in adjusted free cash flow was driven by higher planned spend on property, plant and equipment including incremental investments in vehicles, machinery and equipment and notable project spend at our Baltimore, Maryland facility and Kimball, Nebraska incinerator and increased working capital balances, partially offset by higher cash flow from operations. Additional information regarding adjusted free cash flow, which is a non-GAAP measure, including a reconciliation of net cash from operating activities to adjusted free cash flow, appears below under “Adjusted Free Cash Flow.
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Segment Performance
The primary financial measure by which we evaluate the performance of our segments is Adjusted EBITDA. The following table sets forth certain financial information associated with our results of operations for the three and nine months ended September 30, 2024 and September 30, 2023 (in thousands, except percentages):
 Summary of Operations
 Three Months EndedNine Months Ended
September 30,September 30,
 20242023
Change
%
Change
20242023Change% Change
Direct Revenues (1):
    
Environmental Services$1,297,187$1,146,363$150,82413.2%$3,779,080$3,389,140$389,94011.5%
Safety-Kleen Sustainability Solutions232,139219,22112,9185.9679,459681,508(2,049)(0.3)
Corporate Items96112(16)N/M297335(38)N/M
Total1,529,4221,365,696163,72612.04,458,8364,070,983387,8539.5
Cost of Revenues (2):
      
Environmental Services874,414766,242108,17214.12,541,0172,300,853240,16410.4
Safety-Kleen Sustainability Solutions171,120169,2071,9131.1496,441498,965(2,524)(0.5)
Corporate Items10,0658,5021,563N/M24,75323,1591,594N/M
Total1,055,599943,951111,64811.83,062,2112,822,977239,2348.5
Selling, General & Administrative Expenses:     
Environmental Services90,27191,139(868)(1.0)281,171265,33815,8336.0
Safety-Kleen Sustainability Solutions19,79318,8689254.960,61656,5194,0977.2
Corporate Items67,78261,0126,77011.1215,803183,29732,50617.7
Total177,846171,0196,8274.0557,590505,15452,43610.4
Adjusted EBITDA:      
Environmental Services332,502288,98243,52015.1956,892822,949133,94316.3
Safety-Kleen Sustainability Solutions41,22631,14610,08032.4122,402126,024(3,622)(2.9)
Corporate Items (71,914)(65,111)(6,803)(10.4)(219,569)(191,312)(28,257)(14.8)
Total$301,814$255,017$46,79718.4$859,725$757,661$102,06413.5%
Adjusted EBITDA as a % of Direct Revenues:
Environmental Services (3)
25.6 %25.2 %0.4 %25.3 %24.3 %1.0 %
Safety-Kleen Sustainability Solutions(3)
17.8 %14.2 %3.6 %18.0 %18.5 %(0.5)%
Corporate Items (4)
(4.7)%(4.8)%0.1 %(4.9)%(4.7)%(0.2)%
Total19.7 %18.7 %1.0 %19.3 %18.6 %0.7 %
_____________________
N/M = not meaningful
(1)Direct revenues are revenues allocated to the segment performing the provided service.
(2)Cost of revenues are shown exclusive of items presented separately on the consolidated statements of operations which consist of (i) accretion of environmental liabilities and (ii) depreciation and amortization.
(3)Calculated as a percentage of individual segment direct revenue.
(4)Calculated as a percentage of total Company direct revenue.
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Direct Revenues
There are many factors which can impact our revenues including, but not limited to: overall levels of industrial activity and economic growth in North America, competitive industry pricing, overall market incineration capacity including captive incineration closures, changes in the regulatory environment including those related to per- and polyfluoroalkyl substances (“PFAS”), impacts of acquisitions and divestitures, the level of emergency response services, government infrastructure investment, reshoring of domestic manufacturing, existence or non-existence of large scale environmental waste and remediation projects, weather related events, the number of parts washers placed at customer sites, miles driven and related lubricant demand, base and blended oil pricing, market supply for base oil products, market changes relative to the collection of used oil and foreign currency translation. In addition, customer efforts to minimize hazardous waste and changes in regulation can impact our revenues.
Environmental Services     
Three Months EndedNine Months Ended
September 30,2024 over 2023September 30,2024 over 2023
(in thousands, except percentages)20242023
Change
%
Change
20242023Change% Change
Direct revenues$1,297,187 $1,146,363 $150,824 13.2 %$3,779,080 $3,389,140 $389,940 11.5 %
Environmental Services direct revenues for the three months ended September 30, 2024 increased $150.8 million from the comparable period in 2023 due to growth across most of our service lines driven by acquisitive growth and incremental revenues from legacy operations. Field and emergency response service revenues increased $105.2 million from the comparable period in 2023 driven by incremental revenue of approximately $75 million from the acquisition of HEPACO as well as contributions from our legacy field services operations. Technical services revenue increased $33.3 million largely due to contributions across our portfolio of waste disposal facilities, including higher incineration pricing and volumes. For the three months ended September 30, 2024, utilization at our incinerators increased from 86% to 89%. Revenues for Safety-Kleen core service offerings grew by $18.6 million from the comparable period in 2023 driven by improved pricing and greater demand for our containerized waste, vacuum and parts washer services. These increases were partially offset by decreased revenues from our industrial services operations for the three months ended September 30, 2024, which declined $4.7 million due to lower turnaround activity late in the quarter, as compared to the same period in 2023. Direct revenues for Canadian operations of the Environmental Services segment decreased by $2.2 million due to foreign currency translation.
Environmental Services direct revenues for the nine months ended September 30, 2024 increased $389.9 million from the comparable period in 2023 due to growth across most of our service lines driven by incremental revenues from legacy operations and acquisitive growth. Field and emergency response service revenues for the nine months ended September 30, 2024 increased $219.1 million from the comparable period in 2023 driven by incremental revenue of approximately $160 million from the acquisition of HEPACO as well as overall growth in core field and emergency response service offerings. Technical services revenue increased $128.0 million largely due to higher incineration pricing and volume coupled with improved pricing at our landfill facilities. Utilization at our incinerators increased from 83% to 85% for the nine months ended September 30, 2024 as compared to the same period in 2023. Revenues for Safety-Kleen core service offerings for the nine months ended September 30, 2024 grew by $63.1 million from the comparable period in 2023 due to improved pricing and greater demand for our containerized waste, vacuum and parts washer services. Revenue from our industrial services operations declined $21.7 million due to lower turnaround activity and related high-value services for the nine months ended September 30, 2024 compared to the same period in 2023, partially offset by incremental revenue from the acquisition of Thompson Industrial Services which occurred in March 2023. Direct revenues for Canadian operations of the Environmental Services segment decreased by $4.3 million due to foreign currency translation.
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Safety-Kleen Sustainability Solutions
Three Months EndedNine Months Ended
September 30,2024 over 2023September 30,2024 over 2023
(in thousands, except percentages)20242023Change%
Change
20242023Change% Change
Direct revenues$232,139 $219,221 $12,918 5.9 %$679,459 $681,508 $(2,049)(0.3)%
In the three months ended September 30, 2024, SKSS direct revenues increased $12.9 million from the comparable period in 2023 due to a $16.8 million increase in revenues from the sale of vacuum gas oil and specialty refinery products largely resulting from the acquisition of Noble which took place on March 1, 2024. This increase was partially offset by a $1.8 million decrease in revenues from the collection of used oil despite an increase in the volume collected in the three months ended September 30, 2024 when compared to the used oil collections in the same period of 2023. Revenues from the sale of base and blended oil products were relatively flat due to unfavorable market conditions.
In the nine months ended September 30, 2024, SKSS direct revenues decreased $2.0 million from the comparable period in 2023 largely due to a $12.8 million reduction in revenues from base oil sales driven primarily by lower pricing and, to a lesser extent, lower volumes sold. Revenue from contract packaging decreased $8.9 million and revenues generated from the sales of other products decreased $5.2 million for the nine months ended September 30, 2024 as compared to the same period in 2023. Revenue from the sales of blended oil products decreased by $2.3 million in the nine months ended September 30, 2024 when compared with the same period in the prior year, primarily due to lower pricing despite increased volume sold. These decreases were partially offset by a $27.2 million increase in revenues from the sale of vacuum gas oil and specialty refinery products primarily driven by the acquisition of Noble as well as a $2.3 million increase in revenues from the collection of used oil driven by higher volume collected in the nine months ended September 30, 2024 when compared to the used oil collections in the same period of 2023.
Cost of Revenues 
We believe that management of operating costs is vital to our ability to remain price competitive. We continue to experience inflationary pressures across several cost categories, but most notably related to internal and external labor, transportation, maintenance costs, and energy related costs. We aim to manage these increases through constant cost monitoring and a focus on cost saving areas, including lowering employee turnover, as well as our overall customer pricing strategies designed to offset the inflationary impacts on our margins.
We continue to upgrade the quality and efficiency of our services through the development of new technology and continued modifications and expansion at our facilities while also leveraging certain fixed costs of our operating infrastructure. We invest in new business opportunities and aggressively implement strategic sourcing and logistics solutions, while also continuing to optimize our management and operating structure in an effort to manage our operating margins.
Environmental Services
Three Months EndedNine Months Ended
September 30,2024 over 2023September 30,2024 over 2023
(in thousands, except percentages)20242023
Change
%
Change
20242023Change% Change
Cost of revenues$874,414$766,242$108,17214.1 %$2,541,017$2,300,853$240,16410.4 %
As a % of Direct revenues67.4 %66.8 %0.6 %67.2 %67.9 %(0.7)%
Environmental Services cost of revenues for the three months ended September 30, 2024 increased $108.2 million from the comparable period in 2023 while remaining relatively consistent as a percentage of revenues. Commensurate with the revenue growth in the business and recent acquisition of HEPACO, labor and benefit related costs increased $54.3 million, equipment and supply costs increased $41.6 million and external transportation, vehicle and fuel related costs increased $13.3 million for the three months ended September 30, 2024 when compared to the three months ended September 30, 2023.
Environmental Services cost of revenues for the nine months ended September 30, 2024 increased $240.2 million from the comparable period in 2023, however as a percentage of revenues decreased 0.7%. Commensurate with the revenue growth in the business and recent acquisitions, labor and benefit related costs increased $130.3 million, equipment and supply costs increased $77.2 million and external transportation, vehicle and fuel related costs increased $24.6 million for the nine months ended September 30, 2024 when compared to the nine months ended September 30, 2023. Overall, the growth of revenue outpaced cost increases resulting in the improved margin of the segment.
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Safety-Kleen Sustainability Solutions
Three Months EndedNine Months Ended
September 30,2024 over 2023September 30,2024 over 2023
(in thousands, except percentages)20242023
Change
%
Change
20242023Change% Change
Cost of revenues$171,120$169,207$1,9131.1 %$496,441$498,965$(2,524)(0.5)%
As a % of Direct revenues73.7 %77.2 %(3.5)%73.1 %73.2 %(0.1)%
SKSS cost of revenues for the three months ended September 30, 2024 increased $1.9 million from the comparable period in 2023, driven by the revenue increase discussed above. As a percentage of revenues these costs decreased by 3.5% due to lower re-refinery operating costs incurred during the period.
SKSS cost of revenues for the nine months ended September 30, 2024 decreased $2.5 million from the comparable period in 2023 and remained relatively consistent as a percentage of revenues driven by market related pricing decreases discussed in the revenue section above, partially offset by lower re-refinery operating costs incurred specifically in the three months ended September 30, 2024 as compared to the same period in the prior year.
Selling, General and Administrative Expenses
We strive to manage our selling, general and administrative (“SG&A”) expenses commensurate with the overall performance of our segments and corresponding revenue levels. We believe our ability to properly align these costs with business performance is reflective of our strong management of the businesses and further promotes our ability to remain competitive in the marketplace.
Environmental Services
Three Months EndedNine Months Ended
September 30,2024 over 2023September 30,2024 over 2023
(in thousands, except percentages)20242023
Change
%
Change
20242023Change% Change
SG&A expenses$90,271$91,139$(868)(1.0)%$281,171$265,338$15,8336.0 %
As a % of Direct revenues7.0 %8.0 %(1.0)%7.4 %7.8 %(0.4)%
Environmental Services SG&A expenses for the three months ended September 30, 2024 remained relatively consistent with the comparable periods in 2023, and decreased 1.0% as a percentage of segment revenues, primarily driven by lower labor and benefit related costs, continuing our trend of leveraging our SG&A base in the midst of the revenue growth discussed above.
Environmental Services SG&A expenses for the nine months ended September 30, 2024 increased $15.8 million, from the comparable periods in 2023, however, remained relatively consistent as a percentage of segment revenues, continuing our trend of leveraging our SG&A base in the midst of revenue growth discussed above. SG&A expenses for the nine months ended September 30, 2024 increased approximately $10 million due to additional costs from the HEPACO operations. The remaining increases were spread across various cost categories and were driven by overall growth in the segment results.
Safety-Kleen Sustainability Solutions
Three Months EndedNine Months Ended
September 30,2024 over 2023September 30,2024 over 2023
(in thousands, except percentages)20242023
Change
%
Change
20242023Change% Change
SG&A expenses$19,793$18,868$9254.9 %$60,616$56,519$4,0977.2 %
As a % of Direct revenues8.5 %8.6 %(0.1)%8.9 %8.3 %0.6 %
SKSS SG&A expenses for the three months ended September 30, 2024 increased $0.9 million and remained relatively consistent, as a percentage of revenues, when compared to the same period in 2023. Overall, labor and benefit related costs increased $1.4 million, mainly driven by increased costs from Noble operations. This increase was partially offset by a $1.1 million increase to a remedial liability reserve in 2023 which did not recur in 2024.
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For the nine months ended September 30, 2024, SKSS SG&A expenses increased $4.1 million, and as a percentage of revenues, remained relatively consistent with the prior year. Overall, labor and benefit related costs increased $5.0 million in the nine months ended September 30, 2024 when compared to the same period in 2023, mainly driven by increased costs from Noble operations. This cost increase was partially offset by a $1.1 million increase to remedial liability reserves in 2023 which did not recur in 2024.
Corporate Items
Three Months EndedNine Months Ended
September 30,2024 over 2023September 30,2024 over 2023
(in thousands, except percentages)20242023
Change
%
Change
20242023Change% Change
SG&A expenses$67,782$61,012$6,77011.1 %$215,803$183,297$32,50617.7 %
As a % of Total Company Direct revenues4.4 %4.5 %(0.1)%4.8 %4.5 %0.3 %
Corporate SG&A expenses for the three months ended September 30, 2024 increased $6.8 million from the same period in the prior year yet remained relatively consistent as a percentage of our total direct revenues. The increase in Corporate SG&A expenses for the three months ended September 30, 2024 was driven by a $5.3 million increase in labor and benefits related costs, including stock-based compensation, primarily resulting from incremental headcount from the acquired operations and a $1.2 million increase in information technology related costs.
Corporate SG&A expenses for the nine months ended September 30, 2024 increased $32.5 million yet remained relatively consistent as a percentage of our total direct revenues when compared to the same period in the prior year. The increase in Corporate SG&A expenses for the nine months ended September 30, 2024 was driven by a $21.7 million increase in labor and benefits related costs, including stock-based compensation, a $3.6 million change in legal reserve costs and a $2.4 million increase in information technology related costs.
Adjusted EBITDA
Management considers Adjusted EBITDA to be a measurement of performance which provides useful information to both management and investors. Adjusted EBITDA should not be considered an alternative to net income or other measurements under generally accepted accounting principles (“GAAP”). We define Adjusted EBITDA as net income plus accretion of environmental liabilities, stock-based compensation, depreciation and amortization, net interest expense, loss on early extinguishment of debt and provision for income taxes and excludes other gains, losses and non-cash charges not deemed representative of fundamental segment results and other expense (income), net. Adjusted EBITDA is not calculated identically by all companies and therefore our measurements of Adjusted EBITDA, while defined consistently with our existing credit agreement, may not be comparable to similarly titled measures reported by other companies.
We use Adjusted EBITDA to enhance our understanding of our operating performance, which represents our views concerning our performance in the ordinary, ongoing and customary course of our operations. We historically have found it helpful, and believe that investors have found it helpful, to consider an operating measure that excludes certain expenses relating to transactions not reflective of our core operations.
The information about our operating performance provided by Adjusted EBITDA is used by our management for a variety of purposes. We regularly communicate Adjusted EBITDA results to our lenders since our loan covenants are based upon levels of Adjusted EBITDA achieved and to our board of directors and we discuss with the board our interpretation of such results. We also compare our Adjusted EBITDA performance against internal targets as a key factor in determining cash and equity bonus compensation for executives and other employees, largely because we believe that this measure is indicative of how the fundamental business is performing and being managed.
We also provide information relating to our Adjusted EBITDA so that analysts, investors and other interested persons have the same data that we use to assess our core operating performance. We believe that Adjusted EBITDA should be viewed only as a supplement to the GAAP financial information. We also believe, however, that providing this information in addition to, and together with, GAAP financial information provides a better understanding of our core operating performance and how management evaluates and measures our performance.
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The following table presents Adjusted EBITDA as well as Adjusted EBITDA as a percentage of Direct Revenues by segment (in thousands, except percentages):
 Three Months EndedNine Months Ended
September 30,2024 over 2023September 30,2024 over 2023
(in thousands, except percentages)20242023Change%
Change
20242023Change% Change
Adjusted EBITDA:    
Environmental Services$332,502$288,982$43,52015.1 %$956,892$822,949$133,94316.3 %
Safety-Kleen Sustainability Solutions41,22631,14610,08032.4 122,402126,024(3,622)(2.9)
Corporate Items (71,914)(65,111)(6,803)(10.4)(219,569)(191,312)(28,257)(14.8)
Total$301,814$255,017$46,79718.4 %$859,725$757,661$102,06413.5 %
Adjusted EBITDA as a % of Direct Revenues (1):
Environmental Services25.6 %25.2 %0.4 %25.3 %24.3 %1.0 %
Safety-Kleen Sustainability Solutions17.8 %14.2 %3.6 %18.0 %18.5 %(0.5)%
Corporate Items(4.7)%(4.8)%0.1 %(4.9)%(4.7)%(0.2)%
Total19.7 %18.7 %1.0 %19.3 %18.6 %0.7 %
______________
(1)    Environmental Services and SKSS calculated as a percentage of individual segment direct revenues. Corporate Items calculated as a percentage of total Company direct revenues.
The following is a reconciliation of net income to Adjusted EBITDA for the following periods (in thousands, except percentages):
Three Months EndedNine Months Ended
 September 30,September 30,
 2024202320242023
Net income$115,213 $91,340 $318,325 $279,507 
Accretion of environmental liabilities3,618 3,388 10,139 10,281 
Stock-based compensation5,837 4,291 20,690 14,809 
Depreciation and amortization100,063 92,970 295,632 267,425 
Other expense (income), net1,123 (334)2,431 833 
Loss on early extinguishment of debt— — — 2,362 
Interest expense, net of interest income35,779 29,696 100,767 80,400 
Provision for income taxes40,181 33,666 111,741 102,044 
Adjusted EBITDA$301,814 $255,017 $859,725 $757,661 
As a % of Direct revenues19.7 %18.7 %19.3 %18.6 %
Depreciation and Amortization
Three Months EndedNine Months Ended
September 30,2024 over 2023September 30,2024 over 2023
(in thousands, except percentages)20242023Change%
Change
20242023Change% Change
Depreciation of fixed assets and amortization of landfills and finance leases$86,201 $80,432 $5,769 7.2 %$254,888 $229,658 $25,230 11.0 %
Permits and other intangibles amortization13,862 12,538 1,324 10.6 40,744 37,767 2,977 7.9 
Total depreciation and amortization$100,063 $92,970 $7,093 7.6 %$295,632 $267,425 $28,207 10.5 %
Depreciation and amortization for the three and nine months ended September 30, 2024 increased by $7.1 million and $28.2 million from the comparable periods in 2023 due to the depreciation of fixed assets and amortization of intangible assets placed in service in the last quarter of 2023 and throughout 2024 including the incremental assets acquired from the March 2024 HEPACO and Noble acquisitions.
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Loss on Early Extinguishment of Debt
Three Months EndedNine Months Ended
September 30,2024 over 2023September 30,2024 over 2023
(in thousands, except percentages)20242023Change%
Change
20242023Change% Change
Loss on early extinguishment of debt$— $— $— — %$— $(2,362)$2,362 100.0 %
During the nine months ended September 30, 2023, we recorded a $2.4 million loss on early extinguishment of debt in connection with the repayment of outstanding debt due in 2024.
Interest Expense, Net of Interest Income
Three Months EndedNine Months Ended
September 30,2024 over 2023September 30,2024 over 2023
(in thousands, except percentages)20242023Change%
Change
20242023Change% Change
Interest expense, net of interest income$35,779 $29,696 $6,083 20.5 %$100,767 $80,400 $20,367 25.3 %
Interest expense, net of interest income for the three months ended September 30, 2024 increased $6.1 million from the comparable period in 2023 due to higher levels of outstanding debt as a result of the 2024 Incremental Term Loans entered into on March 22, 2024. Interest expense was partially offset by a $2.5 million increase in interest income in the three months ended September 30, 2024 compared to the comparable period in 2023.
Interest expense, net of interest income for the nine months ended September 30, 2024 increased $20.4 million from the comparable period in 2023. During the nine months ended September 30, 2023, interest expense, net of interest income included an $8.3 million benefit recognized from settling interest rate swaps in that prior year period.
Absent this benefit, interest expense, net of interest income, for the nine months ended September 30, 2024 increased $12.1 million from the comparable period in 2023 due to the 2024 Incremental Term Loans discussed above. Interest expense was partially offset by a $5.4 million increase in interest income in the nine months ended September 30, 2024 compared to the comparable period in 2023.
As of September 30, 2024, the effective interest rate on our debt was 5.6%. For the remainder of 2024, we expect interest expense to continue to trend higher than the prior year due to higher levels of outstanding debt and a slightly higher weighted average effective interest rate. For additional information regarding the financing events during 2024 and our current portfolio of long-term debt, see Note 11, “Financing Arrangements,” to the accompanying unaudited consolidated financial statements.
Provision for Income Taxes
Three Months EndedNine Months Ended
September 30,2024 over 2023September 30,2024 over 2023
(in thousands, except percentages)20242023Change%
Change
20242023Change% Change
Provision for income taxes$40,181$33,666$6,51519.4 %$111,741$102,044$9,6979.5 %
Effective tax rate25.9 %26.9 %(1.0)%26.0 %26.7 %(0.7)%
For the three and nine months ended September 30, 2024, the provision for income taxes increase was consistent with the increase in pre-tax income compared to the prior period. Our effective tax rates for the three and nine months ended September 30, 2024 remained relatively consistent compared to the prior periods.
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Liquidity and Capital Resources 
We assess our liquidity in terms of our ability to generate cash to fund our operating, investing, and financing activities. Our primary ongoing cash requirements will be to fund operations, capital expenditures, interest payments and investments in line with our business strategy as of the date of this report. We believe our future operating cash flows will be sufficient to meet our future operating and internal investing cash needs. We monitor our actual needs and forecasted cash flows, our liquidity and our capital resources, enabling us to plan our present needs and fund items that may arise during the year as a result of changing business conditions or opportunities. Furthermore, our existing cash balance and the availability of additional borrowings under our revolving credit facility provide additional potential sources of liquidity should they be required.
Summary of Cash Flow Activity
Nine Months Ended
September 30,
(in thousands)20242023
Net cash from operating activities$473,833 $455,692 
Net cash used in investing activities(812,940)(447,069)
Net cash from (used in) financing activities408,555 (165,322)
Net cash from operating activities
Net cash from operating activities for the nine months ended September 30, 2024 was $473.8 million as compared to $455.7 million in the same period in 2023. This $18.1 million increase in operating cash flows was attributable to an increase in operating income of $68.1 million, lower cash paid for taxes of $6.6 million, and a $4.4 million reduction in environmental expenditures for the nine months ended September 30, 2024 as compared to the same period in 2023. These were partially offset by increased working capital balances and an increase in cash paid for interest of $33.4 million.
Net cash used in investing activities
Net cash used in investing activities for the nine months ended September 30, 2024 was $812.9 million, an increase of $365.9 million from the comparable period in 2023. Cash used for acquisitions increased $354.4 million as we paid more for the acquisitions of HEPACO and Noble in 2024 than we did for the acquisition of Thompson Industrial in 2023. Additions to property, plant and equipment increased $57.9 million, largely driven by increased investments in vehicles, machinery and equipment for our operations and notable project spend including $15.8 million spent on the Baltimore, Maryland facility. The remaining change in net cash used in investing activities was due to the timing of transactions within our wholly owned captive insurance company which resulted in a $26.3 million cash inflow in the nine months ended September 30, 2024 as compared to a $19.9 million cash outflow in the nine months ended 2023.
Net cash from (used in) financing activities
Net cash from financing activities for the nine months ended September 30, 2024 was $408.6 million, as compared to net cash used in financing activities of $165.3 million for the nine months ended September 30, 2023. The primary drivers of this change were the incurrence of additional term loans net of discount of $499.4 million in 2024 as compared to a net $121.5 million repayment of debt in 2023. Partially offsetting this activity was an increase in finance lease payments of $12.0 million.
Adjusted Free Cash Flow
Management considers adjusted free cash flow to be a measure of liquidity which provides useful information to both management, creditors and investors about our financial strength and our ability to generate cash. Additionally, adjusted free cash flow is a metric on which a portion of management incentive compensation is based. We believe that adjusted free cash flow should be viewed only as a supplement to the GAAP financial information. We define adjusted free cash flow as net cash from operating activities excluding cash impacts of items derived from non-operating activities, less additions to property, plant and equipment plus proceeds from sales or disposals of fixed assets. Adjusted free cash flow should not be considered an alternative to net cash from operating activities or other measurements under GAAP. Adjusted free cash flow is not calculated identically by all companies, and therefore our measurements of adjusted free cash flow may not be comparable to similarly titled measures reported by other companies.
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The following is a reconciliation of net cash from operating activities to adjusted free cash flow for the following periods (in thousands):
Nine Months Ended
 September 30,
 20242023
Net cash from operating activities$473,833 $455,692 
Additions to property, plant and equipment(369,826)(311,906)
Proceeds from sale and disposal of fixed assets6,353 5,129 
Adjusted free cash flow$110,360 $148,915 
Summary of Capital Resources
At September 30, 2024, cash and cash equivalents and marketable securities totaled $594.7 million, compared to $550.8 million at December 31, 2023. At September 30, 2024, cash and cash equivalents held by our Canadian subsidiaries totaled $46.8 million. The cash and cash equivalents and marketable securities balance for our U.S. operations was $547.9 million at September 30, 2024. Our U.S. operations had net operating cash inflows of $478.3 million for the nine months ended September 30, 2024.
We maintain a $600.0 million revolving credit facility of which, as of September 30, 2024, approximately $469.8 million was available to borrow under the facility, with letters of credit of $130.2 million outstanding.
Material Capital Requirements
Capital Expenditures
Capital expenditures during the first nine months of 2024 were $369.8 million as compared to $311.9 million during the first nine months of 2023. The increase was driven by incremental investments in our fleet and equipment and Baltimore, Maryland facility as well as incremental spend on the Kimball incinerator. We anticipate that 2024 capital spending, net of disposals, will be in the range of $400.0 million to $430.0 million.
We are nearing the completion of the construction of our new incinerator in Kimball, Nebraska and intend to commence operations in the fourth quarter of 2024. Total spending on the project as of September 30, 2024 was $198.0 million. Capital spending on the strategic project in Baltimore, Maryland for the first nine months of 2024 was $15.8 million for the purchase of the facility and site improvements.
We anticipate that the capital spending will be funded by cash from our operations. Unanticipated changes in environmental regulations could require us to make significant capital expenditures for our facilities and adversely affect our results of operations and cash flow.
Financing Arrangements
As of September 30, 2024, our financing arrangements include (i) $545.0 million of 4.875% senior unsecured notes due 2027, (ii) $1,468.7 million of senior secured term loans due 2028, (iii) $300.0 million of 5.125% senior unsecured notes due 2029 and (iv) $500.0 million of 6.375% senior unsecured notes due 2031. As noted above, we also maintain our $600.0 million revolving credit facility with no amounts owed as of September 30, 2024.
The material terms of these arrangements are discussed further in Note 11, “Financing Arrangements,” to the accompanying unaudited consolidated financial statements.
As of September 30, 2024, we were in compliance with the covenants of all of our debt agreements, and we believe we will continue to meet such covenants.
Common Stock Repurchases Pursuant to Publicly Announced Plan
The Company’s common stock repurchases are made pursuant to the previously authorized board approved plan to repurchase up to $1.1 billion of the Company’s common stock. During the three and nine months ended September 30, 2024, the Company repurchased and retired 84,910 and 135,572 shares, respectively, of the Company’s common stock for total expenditures of $20.0 million and $30.0 million, respectively. During the three and nine months ended September 30, 2023, the Company repurchased and retired a total of 58,341 and 117,064 shares, respectively, of the Company’s common stock for total expenditures of $10.0 million and $18.0 million, respectively.
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Through September 30, 2024, the Company has repurchased and retired a total of approximately 8.7 million shares of its common stock for $575.9 million under the board approved plan, and as of September 30, 2024, an additional $524.1 million remained available for repurchase of shares.
Environmental Liabilities
(in thousands, except percentages)September 30, 2024December 31, 2023Change% Change
Closure and post-closure liabilities$119,578 $118,600 $978 0.8 %
Remedial liabilities110,658 111,243 (585)(0.5)
Total environmental liabilities$230,236 $229,843 $393 0.2 %
Total environmental liabilities as of September 30, 2024 were $230.2 million, relatively consistent with the balance as of December 31, 2023. During the nine months ended September 30, 2024, the environmental liability balance increased due to accretion of $10.1 million, new environmental liabilities, including those assumed through acquisition, of $5.9 million and changes in environmental liability estimates of $4.4 million. These increases were partially offset by expenditures of $19.7 million. The liability estimate increase was primarily driven by a $2.9 million increase to the remedial liability reserve for a Superfund site.
We anticipate our environmental liabilities, substantially all of which we assumed in connection with our acquisitions, will be payable over many years and that cash flow from operations will generally be sufficient to fund the payment of such liabilities when required.
Events not anticipated (such as future changes in environmental laws and regulations) could require that payments to satisfy our environmental liabilities be made earlier or in greater amounts than currently anticipated, which could adversely affect our results of operations, cash flow and financial condition. Conversely, the development of new treatment technologies or other circumstances may arise in the future which may reduce amounts ultimately paid.
Letters of Credit
We obtain standby letters of credit as security for financial assurances we have been required to provide to regulatory bodies for our hazardous waste facilities and which would be called only in the event that we fail to satisfy closure, post-closure and other obligations under the permits issued by those regulatory bodies for such licensed facilities. As of September 30, 2024, there were $130.2 million outstanding letters of credit. See Note 11, “Financing Arrangements,” to the accompanying unaudited consolidated financial statements.
Critical Accounting Policies and Estimates
In the first nine months of 2024, there were no material changes to the information provided under the heading “Critical Accounting Estimates” included in our Annual Report on Form 10-K for the year ended December 31, 2023. For more information regarding our accounting policies, please refer to Note 2, “Significant Accounting Policies” to the accompanying unaudited consolidated financial statements.

ITEM 3.    QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK 
In the first nine months of 2024, there were no material changes to the information provided under Item 7A. “Quantitative and Qualitative Disclosures about Market Risk” in the Company’s Annual Report on Form 10-K for the year ended December 31, 2023.
ITEM 4.    CONTROLS AND PROCEDURES
Evaluation of Disclosure Controls and Procedures
Based on an evaluation under the supervision and with the participation of our Co-Chief Executive Officers and Chief Financial Officer, as of the end of the period covered by this Quarterly Report on Form 10-Q, our Co-Chief Executive Officers and Chief Financial Officer have concluded that our disclosure controls and procedures (as defined under Rule 13a-15(e) and 15d-15(e) under the Securities Exchange Act of 1934, as amended (the “Exchange Act”)) were effective as of September 30, 2024 to ensure that information required to be disclosed by us in reports that we file or submit under the Exchange Act is recorded, processed, summarized and reported within the time periods specified in Securities and Exchange Commission rules and forms and is accumulated and communicated to our management, including our Co-Chief Executive Officers and Chief Financial Officer, as appropriate to allow timely decisions regarding required disclosure.
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Changes in Internal Control over Financial Reporting
There were no changes in the Company’s internal control over financial reporting identified in connection with the evaluation required by paragraph (d) of Exchange Act Rules 13a-15 or 15d-15 that was conducted during the quarter ended September 30, 2024 that have materially affected, or are reasonably likely to materially affect, the Company’s internal control over financial reporting.
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CLEAN HARBORS, INC. AND SUBSIDIARIES
PART II—OTHER INFORMATION
ITEM 1.    LEGAL PROCEEDINGS
See Note 15, “Commitments and Contingencies,” to the unaudited consolidated financial statements included in Item 1 of this report, which description is incorporated herein by reference.

ITEM 1A.     RISK FACTORS
There have been no material changes to the risk factors from the information provided in Item 1A. in the Company's Annual Report on Form 10-K for the year ended December 31, 2023.

ITEM 2.     UNREGISTERED SALES OF EQUITY SECURITIES AND USE OF PROCEEDS
Common Stock Repurchase Program
The following table provides information with respect to the shares of common stock repurchased by us for the periods indicated:
Period
Total Number of Shares Purchased (1)
Average Price Paid Per Share (2)
Total Number of Shares Purchased as Part of Publicly Announced Plans or Programs
Approximate Dollar Value of Shares that May Yet Be Purchased Under the Plans or Programs
(in thousands) (3)
July 1, 2024 through July 31, 202425,752 $220.63 — $544,101 
August 1, 2024 through August 31, 202445,116 232.87 43,028 534,101 
September 1, 2024 through September 30, 202444,800 239.23 41,882 524,101 
Total115,668 $232.61 84,910 
    ________________
(1)    Includes 30,758 shares withheld by us from employees to satisfy employee tax obligations upon vesting of restricted stock granted to our employees under the Company’s equity incentive plans.
(2)    The average price paid per share of common stock repurchased under the Company’s stock repurchase program includes the commissions paid to brokers.
(3)    The Company’s common stock repurchases are made pursuant to the stock repurchase plan, which was most recently authorized by the board of directors on December 5, 2024, to repurchase up to $1.1 billion of the Company’s common stock. The stock repurchase plan will expire when all of the available allotted funds under the stock repurchase plan are depleted. As of September 30, 2024, the amount available for repurchase under the board approved plan is $524.1 million. We have funded and intend to fund the repurchases through available cash resources. The stock repurchase program authorizes us to purchase our common stock on the open market or in privately negotiated transactions periodically in a manner that complies with applicable U.S. securities laws. The number of shares purchased and the timing of the purchases has depended and will depend on several factors, including share price, cash required for business plans, trading volume and other conditions. As part of our share repurchase program, we maintain a repurchase plan in accordance with Rule 10b5-1 promulgated under the Securities Exchange Act of 1934, as amended. During the three months ended September 30, 2024, no shares were repurchased under the Rule 10b5-1 plan. Future repurchases may be made as open market or privately negotiated transactions as described above. We have no obligation to repurchase stock under this program and may suspend or terminate the repurchase program at any time.

ITEM 3.     DEFAULTS UPON SENIOR SECURITIES
None

ITEM 4.    MINE SAFETY DISCLOSURES
Not applicable

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ITEM 5.     OTHER INFORMATION
During the quarter ended September 30, 2024, no director or “officer” (as defined in Rule 16a-1(f)) of Clean Harbors, Inc. adopted, modified or terminated a “Rule 10b5-1 trading arrangement” or “non-Rule 10b5-1 trading arrangement,” as each term is defined in Item 408(a) of Regulation S-K.

ITEM 6.    EXHIBITS
Item No. Description Location
10.1+(1)
31.1  Filed herewith
31.2Filed herewith
31.3  Filed herewith
32  Furnished herewith
101.SCH Inline XBRL Taxonomy Extension Schema Document Filed herewith
101.CALInline XBRL Taxonomy Extension Calculation Linkbase DocumentFiled herewith
101.LABInline XBRL Taxonomy Extension Label Linkbase DocumentFiled herewith
101.PREInline XBRL Taxonomy Extension Presentation Linkbase DocumentFiled herewith
101.DEFInline XBRL Taxonomy Extension Definition Linkbase DocumentFiled herewith
104Cover Page Interactive Data File (formatted as Inline XBRL with applicable taxonomy extension information contained in Exhibits 101*)Filed herewith
_______________________
(1) Incorporated by reference to Exhibit 4.43H to the Company’s Current Report on Form 8-K filed on October 11, 2024.
+ Certain schedules and similar attachments have been omitted. The Company agrees to furnish a supplemental copy to the SEC upon request.

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CLEAN HARBORS, INC. AND SUBSIDIARIES
SIGNATURES
    Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized. 
 CLEAN HARBORS, INC.
 By:/s/ MICHAEL L. BATTLES
  Michael L. Battles
  Co-Chief Executive Officer and Co-President
Date:October 30, 2024  
 By:/s/ ERIC W. GERSTENBERG
  Eric W. Gerstenberg
  Co-Chief Executive Officer and Co-President
Date:October 30, 2024 
By:/s/ ERIC J. DUGAS
Eric J. Dugas
Executive Vice President and Chief Financial Officer
Date:October 30, 2024

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