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equal to (a) the number of shares of Issuer common stock subject to the option multiplied by (b) the excess of the Merger Consideration over the per-share exercise price of such option."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"Pursuant to the Merger Agreement, at the effective time of the merger, each outstanding stock option of the Issuer  became fully vested and was cancelled and entitled the holder of such option to receive in exchange therefor an amount in cash equal to (a) the number of shares of Issuer common stock subject to the option multiplied by (b) the excess of the Merger Consideration over the per-share exercise price of such option."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"Pursuant to the Merger Agreement, at the effective time of the merger, each outstanding stock option of the Issuer  became fully vested and was cancelled and entitled the holder of such option to receive in exchange therefor an amount in cash equal to (a) the number of shares of Issuer common stock subject to the option multiplied by (b) the excess of the Merger Consideration over the per-share exercise price of such option."}],"balance_after":0,"derivative":{"exercise_price":35.05,"exercise_date":"2017-01-03","expiration_date":"2026-01-03","underlying":"Common Stock","underlying_shares":6266},"source":{"system":"sec-edgar","filing":"0001437749-22-010678","document":"rdgdoc.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1783400/000143774922010678/rdgdoc.xml","form_type":"4"}},{"id":2285479,"issuer":{"id":127674,"kind":"organization","name":"US Ecology, Inc.","symbol":"ECOL"},"owners":[{"id":36513,"kind":"person","name":"Feeler Jeffrey R","position":1,"cik":"0001369458","reported_name":"Feeler Jeffrey R","relationship":{"director":true,"officer":true,"officer_title":"President & CEO"}}],"security":"Common 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(\"Parent\") and Bronco Acquisition Corp. (filed as Exhibit 2.1 to the Form 8-K filed with the Securities and Exchange Commission on February 10, 2022). At the effective time of the merger, each Issuer share of common stock issued and outstanding immediately prior to the effective time of the merger was converted into the right to receive $48.00 per share in cash without interest (\"Merger Consideration\")."},{"field":"shares","element":"transactionShares","label":"F1","text":"Pursuant to the Agreement and Plan of Merger (the \"Merger Agreement\"), entered into on February 8, 2022, by and among the Issuer, Republic Services, Inc. (\"Parent\") and Bronco Acquisition Corp. (filed as Exhibit 2.1 to the Form 8-K filed with the Securities and Exchange Commission on February 10, 2022). 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The number of PSU's to which an Executive will be entitled will be determined based on a 1-year measurement period from January 1, 2022 to December 31, 2022 based on achievement of established targets with respect to the Company's revenue growth and net debt leverage, each weighted at 50% of the Target PSUs. Based on actual results, each Executive will be eligible to receive 0% to 200% of the Target PSUs. The PSUs will be earned over a 3-year period beginning January 1, 2022, cliff vesting on December 31, 2024. After the payout is determined, the number of shares to be provided is subject to modification based on the percentage change in the price of the Company's common stock from January 1, 2022 to December 31, 2024 relative to the percentage change in the price of the common stock of certain companies in the environmental and facilities industry."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"Each Performance Stock Unit (\"PSU\") represents a contingent right to receive one share of the Company's common stock (\"Target PSUs\"). The number of PSU's to which an Executive will be entitled will be determined based on a 1-year measurement period from January 1, 2022 to December 31, 2022 based on achievement of established targets with respect to the Company's revenue growth and net debt leverage, each weighted at 50% of the Target PSUs. Based on actual results, each Executive will be eligible to receive 0% to 200% of the Target PSUs. The PSUs will be earned over a 3-year period beginning January 1, 2022, cliff vesting on December 31, 2024. After the payout is determined, the number of shares to be provided is subject to modification based on the percentage change in the price of the Company's common stock from January 1, 2022 to December 31, 2024 relative to the percentage change in the price of the common stock of certain companies in the environmental and facilities industry."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"Each Performance Stock Unit (\"PSU\") represents a contingent right to receive one share of the Company's common stock (\"Target PSUs\"). The number of PSU's to which an Executive will be entitled will be determined based on a 1-year measurement period from January 1, 2022 to December 31, 2022 based on achievement of established targets with respect to the Company's revenue growth and net debt leverage, each weighted at 50% of the Target PSUs. 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The number of PSU's to which an Executive will be entitled will be determined based on a 1-year measurement period from January 1, 2022 to December 31, 2022 based on achievement of established targets with respect to the Company's revenue growth and net debt leverage, each weighted at 50% of the Target PSUs. Based on actual results, each Executive will be eligible to receive 0% to 200% of the Target PSUs. The PSUs will be earned over a 3-year period beginning January 1, 2022, cliff vesting on December 31, 2024. After the payout is determined, the number of shares to be provided is subject to modification based on the percentage change in the price of the Company's common stock from January 1, 2022 to December 31, 2024 relative to the percentage change in the price of the common stock of certain companies in the environmental and facilities industry."}],"balance_after":28249,"derivative":{"exercise_price":0,"underlying":"Common Stock","underlying_shares":28249},"source":{"system":"sec-edgar","filing":"0001437749-22-000422","document":"rdgdoc.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1783400/000143774922000422/rdgdoc.xml","form_type":"4"}},{"id":2446163,"issuer":{"id":127674,"kind":"organization","name":"US Ecology, Inc.","symbol":"ECOL"},"owners":[{"id":36513,"kind":"person","name":"Feeler Jeffrey R","position":1,"cik":"0001369458","reported_name":"Feeler Jeffrey R","relationship":{"director":true,"officer":true,"officer_title":"President & CEO"}}],"security":"Common Stock","published_at":"2022-01-05T16:31:07.000Z","date":"2022-01-03","kind":"grant","acquired":true,"shares":28249,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"Restricted stock vesting annually and ratably over three years from the date of issuance."}],"balance_after":121927,"source":{"system":"sec-edgar","filing":"0001437749-22-000422","document":"rdgdoc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1783400/000143774922000422/rdgdoc.xml","form_type":"4"}},{"id":2908842,"issuer":{"id":127674,"kind":"organization","name":"US Ecology, Inc.","symbol":"ECOL"},"owners":[{"id":36513,"kind":"person","name":"Feeler Jeffrey R","position":1,"cik":"0001369458","reported_name":"Feeler Jeffrey R","relationship":{"director":true,"officer":true,"officer_title":"President & CEO"}}],"security":"Common Stock","published_at":"2021-01-13T15:44:11.000Z","date":"2021-01-11","kind":"tax_withholding","acquired":false,"shares":5602,"price":36.33,"value":203520.66,"ownership":{"direct":true},"footnotes":[{"field":"date","element":"transactionDate","label":"F1","text":"Date on which the number of shares to be withheld was determined upon election by the reporting person."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"Closing price of US Ecology, Inc. common stock on December 31, 2020; upon which the number of shares withheld was determined."}],"balance_after":93678,"source":{"system":"sec-edgar","filing":"0001437749-21-000648","document":"rdgdoc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1783400/000143774921000648/rdgdoc.xml","form_type":"4"}},{"id":2917667,"issuer":{"id":127674,"kind":"organization","name":"US Ecology, Inc.","symbol":"ECOL"},"owners":[{"id":36513,"kind":"person","name":"Feeler Jeffrey R","position":1,"cik":"0001369458","reported_name":"Feeler Jeffrey R","relationship":{"director":true,"officer":true,"officer_title":"President & CEO"}}],"security":"Common Stock Option","published_at":"2021-01-06T15:54:31.000Z","date":"2021-01-04","kind":"grant","acquired":true,"shares":90900,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F2","text":"Issued pursuant to the Amended and Restated US Ecology, Inc. 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Each Performance Stock Unit represents a contingent right to receive one share of US Ecology, Inc. Common Stock. The number of shares reported represents the target number of shares underlying the Performance Stock Units. The actual number of shares to be delivered in settlement of the Performance Stock Units earned during the performance period will be based on US Ecology, Inc.'s total shareholder return over the two and one-half year vesting period relative to the S&P 600 (weighted at 50%) and a peer group of certain companies in the environmental and facilities services industry (weighted at 50%) and could equal 200% of the target number of shares underlying the Performance Stock Units. The Performance Stock Units will settle as soon as practicable after December 31, 2022."},{"field":"price","element":"transactionPricePerShare","label":"F1","text":"Grant of Performance Stock Units. Each Performance Stock Unit represents a contingent right to receive one share of US Ecology, Inc. Common Stock. The number of shares reported represents the target number of shares underlying the Performance Stock Units. The actual number of shares to be delivered in settlement of the Performance Stock Units earned during the performance period will be based on US Ecology, Inc.'s total shareholder return over the two and one-half year vesting period relative to the S&P 600 (weighted at 50%) and a peer group of certain companies in the environmental and facilities services industry (weighted at 50%) and could equal 200% of the target number of shares underlying the Performance Stock Units. The Performance Stock Units will settle as soon as practicable after December 31, 2022."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"Grant of Performance Stock Units. Each Performance Stock Unit represents a contingent right to receive one share of US Ecology, Inc. Common Stock. The number of shares reported represents the target number of shares underlying the Performance Stock Units. The actual number of shares to be delivered in settlement of the Performance Stock Units earned during the performance period will be based on US Ecology, Inc.'s total shareholder return over the two and one-half year vesting period relative to the S&P 600 (weighted at 50%) and a peer group of certain companies in the environmental and facilities services industry (weighted at 50%) and could equal 200% of the target number of shares underlying the Performance Stock Units. The Performance Stock Units will settle as soon as practicable after December 31, 2022."}],"balance_after":24324,"derivative":{"exercise_price":0,"expiration_date":"2022-12-31","underlying":"Common Stock","underlying_shares":24324},"source":{"system":"sec-edgar","filing":"0001437749-20-015411","document":"rdgdoc.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1783400/000143774920015411/rdgdoc.xml","form_type":"4"}},{"id":3212352,"issuer":{"id":127674,"kind":"organization","name":"US Ecology, Inc.","symbol":"ECOL"},"owners":[{"id":36513,"kind":"person","name":"Feeler Jeffrey R","position":1,"cik":"0001369458","reported_name":"Feeler Jeffrey R","relationship":{"director":true,"officer":true,"officer_title":"President & CEO"}}],"security":"Common Stock","published_at":"2020-03-13T11:13:54.000Z","date":"2020-03-11","kind":"purchase","acquired":true,"shares":500,"price":33.7,"value":16850.0,"ownership":{"direct":true},"balance_after":73780,"source":{"system":"sec-edgar","filing":"0001437749-20-005092","document":"rdgdoc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1783400/000143774920005092/rdgdoc.xml","form_type":"4"}},{"id":3221609,"issuer":{"id":127674,"kind":"organization","name":"US Ecology, Inc.","symbol":"ECOL"},"owners":[{"id":36513,"kind":"person","name":"Feeler Jeffrey R","position":1,"cik":"0001369458","reported_name":"Feeler Jeffrey R","relationship":{"director":true,"officer":true,"officer_title":"President & CEO"}}],"security":"Common Stock","published_at":"2020-03-09T14:55:45.000Z","date":"2020-03-06","kind":"purchase","acquired":true,"shares":1140,"price":43.38,"value":49453.2,"ownership":{"direct":true},"balance_after":73280,"source":{"system":"sec-edgar","filing":"0001437749-20-004591","document":"rdgdoc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1783400/000143774920004591/rdgdoc.xml","form_type":"4"}},{"id":3312096,"issuer":{"id":127674,"kind":"organization","name":"US Ecology, Inc.","symbol":"ECOL"},"owners":[{"id":36513,"kind":"person","name":"Feeler Jeffrey R","position":1,"cik":"0001369458","reported_name":"Feeler Jeffrey R","relationship":{"director":true,"officer":true,"officer_title":"President & CEO"}}],"security":"Performance Stock Units","published_at":"2020-01-14T16:56:29.000Z","date":"2020-01-10","kind":"exercise","acquired":false,"shares":3251,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"The number of shares reported represents the shares earned during the three year performance period ending December 31, 2019 (as calculated on January 10, 2020) based on US Ecology Inc.'s total shareholder return relative to the S&P 600 (weighted at 50%) and a peer group of certain companies in the environmental and facilities industry (weighted at 50%). The target number of shares available was 5,500 and the maximum number of shares available was 11,000 or 200% of target."},{"field":"deemedExecutionDate","element":"deemedExecutionDate","label":"F1","text":"The number of shares reported represents the shares earned during the three year performance period ending December 31, 2019 (as calculated on January 10, 2020) based on US Ecology Inc.'s total shareholder return relative to the S&P 600 (weighted at 50%) and a peer group of certain companies in the environmental and facilities industry (weighted at 50%). The target number of shares available was 5,500 and the maximum number of shares available was 11,000 or 200% of target."},{"field":"shares","element":"transactionShares","label":"F1","text":"The number of shares reported represents the shares earned during the three year performance period ending December 31, 2019 (as calculated on January 10, 2020) based on US Ecology Inc.'s total shareholder return relative to the S&P 600 (weighted at 50%) and a peer group of certain companies in the environmental and facilities industry (weighted at 50%). The target number of shares available was 5,500 and the maximum number of shares available was 11,000 or 200% of target."},{"field":"price","element":"transactionPricePerShare","label":"F1","text":"The number of shares reported represents the shares earned during the three year performance period ending December 31, 2019 (as calculated on January 10, 2020) based on US Ecology Inc.'s total shareholder return relative to the S&P 600 (weighted at 50%) and a peer group of certain companies in the environmental and facilities industry (weighted at 50%). The target number of shares available was 5,500 and the maximum number of shares available was 11,000 or 200% of target."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"The number of shares reported represents the shares earned during the three year performance period ending December 31, 2019 (as calculated on January 10, 2020) based on US Ecology Inc.'s total shareholder return relative to the S&P 600 (weighted at 50%) and a peer group of certain companies in the environmental and facilities industry (weighted at 50%). 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The target number of shares available was 5,500 and the maximum number of shares available was 11,000 or 200% of target."}],"balance_after":0,"derivative":{"exercise_price":0,"expiration_date":"2019-12-31","underlying":"Common Stock","underlying_shares":3251},"source":{"system":"sec-edgar","filing":"0001437749-20-000635","document":"rdgdoc.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1783400/000143774920000635/rdgdoc.xml","form_type":"4"}},{"id":3312095,"issuer":{"id":127674,"kind":"organization","name":"US Ecology, Inc.","symbol":"ECOL"},"owners":[{"id":36513,"kind":"person","name":"Feeler Jeffrey R","position":1,"cik":"0001369458","reported_name":"Feeler Jeffrey R","relationship":{"director":true,"officer":true,"officer_title":"President & CEO"}}],"security":"Common Stock","published_at":"2020-01-14T16:56:29.000Z","date":"2020-01-11","kind":"tax_withholding","acquired":false,"shares":9893,"price":57.48,"value":568649.64,"ownership":{"direct":true},"footnotes":[{"field":"date","element":"transactionDate","label":"F2","text":"Date on which the number of shares to be withheld was determined upon election by the reporting person."},{"field":"shares","element":"transactionShares","label":"F3","text":"Number of shares withheld was determined based on the closing price of US Ecology, Inc. common stock on December 31, 2019 and January 10, 2020. Price indicated is a weighted average of the closing price of stock; 8,024 shares at $57.91 per share and 1,869 shares at $55.65 per share."},{"field":"price","element":"transactionPricePerShare","label":"F3","text":"Number of shares withheld was determined based on the closing price of US Ecology, Inc. common stock on December 31, 2019 and January 10, 2020. 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The target number of shares available was 5,500 and the maximum number of shares available was 11,000 or 200% of target."},{"field":"price","element":"transactionPricePerShare","label":"F1","text":"The number of shares reported represents the shares earned during the three year performance period ending December 31, 2019 (as calculated on January 10, 2020) based on US Ecology Inc.'s total shareholder return relative to the S&P 600 (weighted at 50%) and a peer group of certain companies in the environmental and facilities industry (weighted at 50%). 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The number of shares reported represents the target number of shares underlying the PSUs. The actual number of shares to be delivered in settlement of the PSUs earned during the performance period will be based on achievement of established targets with respect to the Parent's Adjusted Earnings Per Share and Return on Invested Capital, each weighted at 50% of the target PSUs. After the payout under the PSUs is determined, the number of shares to be provided is subject to modification based on the percentage change in the price of the Parent's common stock from January 1, 2019 to December 31, 2021, relative to the percentage change in the price of the common stock of certain peer group companies. If earned, PSUs will vest ratably on the anniversary of the date of original issuance for a period of three years. 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The number of shares reported represents the target number of shares underlying the PSUs. The actual number of shares to be delivered in settlement of the PSUs earned during the performance period will be based on achievement of established targets with respect to the Parent's Adjusted Earnings Per Share and Return on Invested Capital, each weighted at 50% of the target PSUs. After the payout under the PSUs is determined, the number of shares to be provided is subject to modification based on the percentage change in the price of the Parent's common stock from January 1, 2019 to December 31, 2021, relative to the percentage change in the price of the common stock of certain peer group companies. If earned, PSUs will vest ratably on the anniversary of the date of original issuance for a period of three years. 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The number of shares reported represents the target number of shares underlying the PSUs. The actual number of shares to be delivered in settlement of the PSUs earned during the performance period will be based on Parent's total shareholder return over the three year vesting period relative to the S&P 600 (weighted at 50%) and a peer group of certain companies in the environmental and facilities services industry (weighted at 50%) and could equal 200% of the target number of shares underlying the PSUs. If earned, PSUs will vest ratably on the anniversary of the date of original issuance for a period of three years. The PSUs will settle as soon as practicable after the expiration date."},{"field":"shares","element":"transactionShares","label":"F2","text":"All outstanding derivative securities of Parent, which include Options and Performance Stock Units (\"PSUs\"), were assumed by Holdco pursuant to the Merger Agreement and were converted into an equivalent number of Options and PSUs, respectively, of Holdco at an equivalent exercise price and under the same terms and conditions as the original award."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"All outstanding derivative securities of Parent, which include Options and Performance Stock Units (\"PSUs\"), were assumed by Holdco pursuant to the Merger Agreement and were converted into an equivalent number of Options and PSUs, respectively, of Holdco at an equivalent exercise price and under the same terms and conditions as the original award."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F5","text":"Each PSU represents a contingent right to receive one share of Parent common stock. The number of shares reported represents the target number of shares underlying the PSUs. The actual number of shares to be delivered in settlement of the PSUs earned during the performance period will be based on Parent's total shareholder return over the three year vesting period relative to the S&P 600 (weighted at 50%) and a peer group of certain companies in the environmental and facilities services industry (weighted at 50%) and could equal 200% of the target number of shares underlying the PSUs. If earned, PSUs will vest ratably on the anniversary of the date of original issuance for a period of three years. The PSUs will settle as soon as practicable after the expiration date."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F5","text":"Each PSU represents a contingent right to receive one share of Parent common stock. The number of shares reported represents the target number of shares underlying the PSUs. The actual number of shares to be delivered in settlement of the PSUs earned during the performance period will be based on Parent's total shareholder return over the three year vesting period relative to the S&P 600 (weighted at 50%) and a peer group of certain companies in the environmental and facilities services industry (weighted at 50%) and could equal 200% of the target number of shares underlying the PSUs. If earned, PSUs will vest ratably on the anniversary of the date of original issuance for a period of three years. 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The number of shares reported represents the target number of shares underlying the PSUs. The actual number of shares to be delivered in settlement of the PSUs earned during the performance period will be based on Parent's total shareholder return over the three year vesting period relative to the S&P 600 (weighted at 50%) and a peer group of certain companies in the environmental and facilities services industry (weighted at 50%) and could equal 200% of the target number of shares underlying the PSUs. If earned, PSUs will vest ratably on the anniversary of the date of original issuance for a period of three years. The PSUs will settle as soon as practicable after the expiration date."},{"field":"shares","element":"transactionShares","label":"F2","text":"All outstanding derivative securities of Parent, which include Options and Performance Stock Units (\"PSUs\"), were assumed by Holdco pursuant to the Merger Agreement and were converted into an equivalent number of Options and PSUs, respectively, of Holdco at an equivalent exercise price and under the same terms and conditions as the original award."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"All outstanding derivative securities of Parent, which include Options and Performance Stock Units (\"PSUs\"), were assumed by Holdco pursuant to the Merger Agreement and were converted into an equivalent number of Options and PSUs, respectively, of Holdco at an equivalent exercise price and under the same terms and conditions as the original award."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F5","text":"Each PSU represents a contingent right to receive one share of Parent common stock. The number of shares reported represents the target number of shares underlying the PSUs. The actual number of shares to be delivered in settlement of the PSUs earned during the performance period will be based on Parent's total shareholder return over the three year vesting period relative to the S&P 600 (weighted at 50%) and a peer group of certain companies in the environmental and facilities services industry (weighted at 50%) and could equal 200% of the target number of shares underlying the PSUs. If earned, PSUs will vest ratably on the anniversary of the date of original issuance for a period of three years. The PSUs will settle as soon as practicable after the expiration date."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F5","text":"Each PSU represents a contingent right to receive one share of Parent common stock. The number of shares reported represents the target number of shares underlying the PSUs. The actual number of shares to be delivered in settlement of the PSUs earned during the performance period will be based on Parent's total shareholder return over the three year vesting period relative to the S&P 600 (weighted at 50%) and a peer group of certain companies in the environmental and facilities services industry (weighted at 50%) and could equal 200% of the target number of shares underlying the PSUs. If earned, PSUs will vest ratably on the anniversary of the date of original issuance for a period of three years. 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(f/k/a US Ecology, Inc.) (\"Parent\"), NRC Group Holdings Corp., US Ecology, Inc. (f/k/a US Ecology Parent, Inc.) (\"Holdco\"), ECOL Merger Sub, Inc. 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The number of shares reported represents the target number of shares underlying the PSUs. The actual number of shares to be delivered in settlement of the PSUs earned during the performance period will be based on achievement of established targets with respect to the Parent's Adjusted Earnings Per Share and Return on Invested Capital, each weighted at 50% of the target PSUs. After the payout under the PSUs is determined, the number of shares to be provided is subject to modification based on the percentage change in the price of the Parent's common stock from January 1, 2019 to December 31, 2021, relative to the percentage change in the price of the common stock of certain peer group companies. If earned, PSUs will vest ratably on the anniversary of the date of original issuance for a period of three years. The PSUs will settle as soon as practicable after the expiration date."},{"field":"shares","element":"transactionShares","label":"F2","text":"All outstanding derivative securities of Parent, which include Options and Performance Stock Units (\"PSUs\"), were assumed by Holdco pursuant to the Merger Agreement and were converted into an equivalent number of Options and PSUs, respectively, of Holdco at an equivalent exercise price and under the same terms and conditions as the original award."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"All outstanding derivative securities of Parent, which include Options and Performance Stock Units (\"PSUs\"), were assumed by Holdco pursuant to the Merger Agreement and were converted into an equivalent number of Options and PSUs, respectively, of Holdco at an equivalent exercise price and under the same terms and conditions as the original award."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F6","text":"Each PSU represents a contingent right to receive one share of Parent common stock. The number of shares reported represents the target number of shares underlying the PSUs. The actual number of shares to be delivered in settlement of the PSUs earned during the performance period will be based on achievement of established targets with respect to the Parent's Adjusted Earnings Per Share and Return on Invested Capital, each weighted at 50% of the target PSUs. After the payout under the PSUs is determined, the number of shares to be provided is subject to modification based on the percentage change in the price of the Parent's common stock from January 1, 2019 to December 31, 2021, relative to the percentage change in the price of the common stock of certain peer group companies. If earned, PSUs will vest ratably on the anniversary of the date of original issuance for a period of three years. The PSUs will settle as soon as practicable after the expiration date."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F6","text":"Each PSU represents a contingent right to receive one share of Parent common stock. The number of shares reported represents the target number of shares underlying the PSUs. The actual number of shares to be delivered in settlement of the PSUs earned during the performance period will be based on achievement of established targets with respect to the Parent's Adjusted Earnings Per Share and Return on Invested Capital, each weighted at 50% of the target PSUs. After the payout under the PSUs is determined, the number of shares to be provided is subject to modification based on the percentage change in the price of the Parent's common stock from January 1, 2019 to December 31, 2021, relative to the percentage change in the price of the common stock of certain peer group companies. If earned, PSUs will vest ratably on the anniversary of the date of original issuance for a period of three years. The PSUs will settle as soon as practicable after the expiration date."}],"balance_after":0,"derivative":{"exercise_price":0,"expiration_date":"2021-12-31","underlying":"Common Stock","underlying_shares":6592},"source":{"system":"sec-edgar","filing":"0001437749-19-021208","document":"rdgdoc.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":8,"url":"https://www.sec.gov/Archives/edgar/data/742126/000143774919021208/rdgdoc.xml","form_type":"4"}},{"id":3384238,"issuer":{"id":154125,"kind":"organization","name":"US Ecology Holdings, Inc.","symbol":"ECOL"},"owners":[{"id":36513,"kind":"person","name":"Feeler Jeffrey R","position":1,"cik":"0001369458","reported_name":"Feeler Jeffrey R","relationship":{"director":true,"officer":true,"officer_title":"President & CEO"}}],"security":"Performance Stock Units","published_at":"2019-11-01T12:07:40.000Z","date":"2019-11-01","kind":"disposition_to_issuer","acquired":false,"shares":5300,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F2","text":"All outstanding derivative securities of Parent, which include Options and Performance Stock Units (\"PSUs\"), were assumed by Holdco pursuant to the Merger Agreement and were converted into an equivalent number of Options and PSUs, respectively, of Holdco at an equivalent exercise price and under the same terms and conditions as the original award."},{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F5","text":"Each PSU represents a contingent right to receive one share of Parent common stock. The number of shares reported represents the target number of shares underlying the PSUs. The actual number of shares to be delivered in settlement of the PSUs earned during the performance period will be based on Parent's total shareholder return over the three year vesting period relative to the S&P 600 (weighted at 50%) and a peer group of certain companies in the environmental and facilities services industry (weighted at 50%) and could equal 200% of the target number of shares underlying the PSUs. If earned, PSUs will vest ratably on the anniversary of the date of original issuance for a period of three years. The PSUs will settle as soon as practicable after the expiration date."},{"field":"shares","element":"transactionShares","label":"F2","text":"All outstanding derivative securities of Parent, which include Options and Performance Stock Units (\"PSUs\"), were assumed by Holdco pursuant to the Merger Agreement and were converted into an equivalent number of Options and PSUs, respectively, of Holdco at an equivalent exercise price and under the same terms and conditions as the original award."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"All outstanding derivative securities of Parent, which include Options and Performance Stock Units (\"PSUs\"), were assumed by Holdco pursuant to the Merger Agreement and were converted into an equivalent number of Options and PSUs, respectively, of Holdco at an equivalent exercise price and under the same terms and conditions as the original award."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F5","text":"Each PSU represents a contingent right to receive one share of Parent common stock. The number of shares reported represents the target number of shares underlying the PSUs. The actual number of shares to be delivered in settlement of the PSUs earned during the performance period will be based on Parent's total shareholder return over the three year vesting period relative to the S&P 600 (weighted at 50%) and a peer group of certain companies in the environmental and facilities services industry (weighted at 50%) and could equal 200% of the target number of shares underlying the PSUs. If earned, PSUs will vest ratably on the anniversary of the date of original issuance for a period of three years. The PSUs will settle as soon as practicable after the expiration date."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F5","text":"Each PSU represents a contingent right to receive one share of Parent common stock. The number of shares reported represents the target number of shares underlying the PSUs. The actual number of shares to be delivered in settlement of the PSUs earned during the performance period will be based on Parent's total shareholder return over the three year vesting period relative to the S&P 600 (weighted at 50%) and a peer group of certain companies in the environmental and facilities services industry (weighted at 50%) and could equal 200% of the target number of shares underlying the PSUs. If earned, PSUs will vest ratably on the anniversary of the date of original issuance for a period of three years. The PSUs will settle as soon as practicable after the expiration date."}],"balance_after":0,"derivative":{"exercise_price":0,"expiration_date":"2020-12-31","underlying":"Common Stock","underlying_shares":5300},"source":{"system":"sec-edgar","filing":"0001437749-19-021208","document":"rdgdoc.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":7,"url":"https://www.sec.gov/Archives/edgar/data/742126/000143774919021208/rdgdoc.xml","form_type":"4"}},{"id":3384237,"issuer":{"id":154125,"kind":"organization","name":"US Ecology Holdings, Inc.","symbol":"ECOL"},"owners":[{"id":36513,"kind":"person","name":"Feeler Jeffrey R","position":1,"cik":"0001369458","reported_name":"Feeler Jeffrey R","relationship":{"director":true,"officer":true,"officer_title":"President & CEO"}}],"security":"Performance Stock Units","published_at":"2019-11-01T12:07:40.000Z","date":"2019-11-01","kind":"disposition_to_issuer","acquired":false,"shares":5500,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F2","text":"All outstanding derivative securities of Parent, which include Options and Performance Stock Units (\"PSUs\"), were assumed by Holdco pursuant to the Merger Agreement and were converted into an equivalent number of Options and PSUs, respectively, of Holdco at an equivalent exercise price and under the same terms and conditions as the original award."},{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F5","text":"Each PSU represents a contingent right to receive one share of Parent common stock. The number of shares reported represents the target number of shares underlying the PSUs. The actual number of shares to be delivered in settlement of the PSUs earned during the performance period will be based on Parent's total shareholder return over the three year vesting period relative to the S&P 600 (weighted at 50%) and a peer group of certain companies in the environmental and facilities services industry (weighted at 50%) and could equal 200% of the target number of shares underlying the PSUs. If earned, PSUs will vest ratably on the anniversary of the date of original issuance for a period of three years. The PSUs will settle as soon as practicable after the expiration date."},{"field":"shares","element":"transactionShares","label":"F2","text":"All outstanding derivative securities of Parent, which include Options and Performance Stock Units (\"PSUs\"), were assumed by Holdco pursuant to the Merger Agreement and were converted into an equivalent number of Options and PSUs, respectively, of Holdco at an equivalent exercise price and under the same terms and conditions as the original award."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"All outstanding derivative securities of Parent, which include Options and Performance Stock Units (\"PSUs\"), were assumed by Holdco pursuant to the Merger Agreement and were converted into an equivalent number of Options and PSUs, respectively, of Holdco at an equivalent exercise price and under the same terms and conditions as the original award."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F5","text":"Each PSU represents a contingent right to receive one share of Parent common stock. The number of shares reported represents the target number of shares underlying the PSUs. The actual number of shares to be delivered in settlement of the PSUs earned during the performance period will be based on Parent's total shareholder return over the three year vesting period relative to the S&P 600 (weighted at 50%) and a peer group of certain companies in the environmental and facilities services industry (weighted at 50%) and could equal 200% of the target number of shares underlying the PSUs. If earned, PSUs will vest ratably on the anniversary of the date of original issuance for a period of three years. The PSUs will settle as soon as practicable after the expiration date."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F5","text":"Each PSU represents a contingent right to receive one share of Parent common stock. The number of shares reported represents the target number of shares underlying the PSUs. The actual number of shares to be delivered in settlement of the PSUs earned during the performance period will be based on Parent's total shareholder return over the three year vesting period relative to the S&P 600 (weighted at 50%) and a peer group of certain companies in the environmental and facilities services industry (weighted at 50%) and could equal 200% of the target number of shares underlying the PSUs. If earned, PSUs will vest ratably on the anniversary of the date of original issuance for a period of three years. The PSUs will settle as soon as practicable after the expiration date."}],"balance_after":0,"derivative":{"exercise_price":0,"expiration_date":"2019-12-31","underlying":"Common Stock","underlying_shares":5500},"source":{"system":"sec-edgar","filing":"0001437749-19-021208","document":"rdgdoc.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":6,"url":"https://www.sec.gov/Archives/edgar/data/742126/000143774919021208/rdgdoc.xml","form_type":"4"}},{"id":3384236,"issuer":{"id":154125,"kind":"organization","name":"US Ecology Holdings, Inc.","symbol":"ECOL"},"owners":[{"id":36513,"kind":"person","name":"Feeler Jeffrey R","position":1,"cik":"0001369458","reported_name":"Feeler Jeffrey R","relationship":{"director":true,"officer":true,"officer_title":"President & CEO"}}],"security":"Stock Options","published_at":"2019-11-01T12:07:40.000Z","date":"2019-11-01","kind":"disposition_to_issuer","acquired":false,"shares":14100,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F2","text":"All outstanding derivative securities of Parent, which include Options and Performance Stock Units (\"PSUs\"), were assumed by Holdco pursuant to the Merger Agreement and were converted into an equivalent number of Options and PSUs, respectively, of Holdco at an equivalent exercise price and under the same terms and conditions as the original award."},{"field":"shares","element":"transactionShares","label":"F2","text":"All outstanding derivative securities of Parent, which include Options and Performance Stock Units (\"PSUs\"), were assumed by Holdco pursuant to the Merger Agreement and were converted into an equivalent number of Options and PSUs, respectively, of Holdco at an equivalent exercise price and under the same terms and conditions as the original award."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"All outstanding derivative securities of Parent, which include Options and Performance Stock Units (\"PSUs\"), were assumed by Holdco pursuant to the Merger Agreement and were converted into an equivalent number of Options and PSUs, respectively, of Holdco at an equivalent exercise price and under the same terms and conditions as the original award."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F4","text":"Options vest ratably on the anniversary of the date of original issuance for a period of three years. Upon vesting, the reporting person will receive a number of shares of common stock equal to the number of Options that have vested."}],"balance_after":0,"derivative":{"exercise_price":63.85,"exercise_date":"2020-01-01","expiration_date":"2029-01-01","underlying":"Common Stock","underlying_shares":14100},"source":{"system":"sec-edgar","filing":"0001437749-19-021208","document":"rdgdoc.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":5,"url":"https://www.sec.gov/Archives/edgar/data/742126/000143774919021208/rdgdoc.xml","form_type":"4"}},{"id":3384235,"issuer":{"id":154125,"kind":"organization","name":"US Ecology Holdings, Inc.","symbol":"ECOL"},"owners":[{"id":36513,"kind":"person","name":"Feeler Jeffrey R","position":1,"cik":"0001369458","reported_name":"Feeler Jeffrey R","relationship":{"director":true,"officer":true,"officer_title":"President & CEO"}}],"security":"Stock Options","published_at":"2019-11-01T12:07:40.000Z","date":"2019-11-01","kind":"disposition_to_issuer","acquired":false,"shares":15500,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F2","text":"All outstanding derivative securities of Parent, which include Options and Performance Stock Units (\"PSUs\"), were assumed by Holdco pursuant to the Merger Agreement and were converted into an equivalent number of Options and PSUs, respectively, of Holdco at an equivalent exercise price and under the same terms and conditions as the original award."},{"field":"shares","element":"transactionShares","label":"F2","text":"All outstanding derivative securities of Parent, which include Options and Performance Stock Units (\"PSUs\"), were assumed by Holdco pursuant to the Merger Agreement and were converted into an equivalent number of Options and PSUs, respectively, of Holdco at an equivalent exercise price and under the same terms and conditions as the original award."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"All outstanding derivative securities of Parent, which include Options and Performance Stock Units (\"PSUs\"), were assumed by Holdco pursuant to the Merger Agreement and were converted into an equivalent number of Options and PSUs, respectively, of Holdco at an equivalent exercise price and under the same terms and conditions as the original award."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F4","text":"Options vest ratably on the anniversary of the date of original issuance for a period of three years. Upon vesting, the reporting person will receive a number of shares of common stock equal to the number of Options that have vested."}],"balance_after":0,"derivative":{"exercise_price":51,"exercise_date":"2019-01-01","expiration_date":"2028-01-01","underlying":"Common Stock","underlying_shares":15500},"source":{"system":"sec-edgar","filing":"0001437749-19-021208","document":"rdgdoc.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/742126/000143774919021208/rdgdoc.xml","form_type":"4"}},{"id":3384234,"issuer":{"id":154125,"kind":"organization","name":"US Ecology Holdings, Inc.","symbol":"ECOL"},"owners":[{"id":36513,"kind":"person","name":"Feeler Jeffrey R","position":1,"cik":"0001369458","reported_name":"Feeler Jeffrey R","relationship":{"director":true,"officer":true,"officer_title":"President & CEO"}}],"security":"Stock Options","published_at":"2019-11-01T12:07:40.000Z","date":"2019-11-01","kind":"disposition_to_issuer","acquired":false,"shares":11066,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F2","text":"All outstanding derivative securities of Parent, which include Options and Performance Stock Units (\"PSUs\"), were assumed by Holdco pursuant to the Merger Agreement and were converted into an equivalent number of Options and PSUs, respectively, of Holdco at an equivalent exercise price and under the same terms and conditions as the original award."},{"field":"shares","element":"transactionShares","label":"F2","text":"All outstanding derivative securities of Parent, which include Options and Performance Stock Units (\"PSUs\"), were assumed by Holdco pursuant to the Merger Agreement and were converted into an equivalent number of Options and PSUs, respectively, of Holdco at an equivalent exercise price and under the same terms and conditions as the original award."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"All outstanding derivative securities of Parent, which include Options and Performance Stock Units (\"PSUs\"), were assumed by Holdco pursuant to the Merger Agreement and were converted into an equivalent number of Options and PSUs, respectively, of Holdco at an equivalent exercise price and under the same terms and conditions as the original award."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F4","text":"Options vest ratably on the anniversary of the date of original issuance for a period of three years. Upon vesting, the reporting person will receive a number of shares of common stock equal to the number of Options that have vested."}],"balance_after":0,"derivative":{"exercise_price":49.15,"exercise_date":"2018-01-02","expiration_date":"2027-01-01","underlying":"Common Stock","underlying_shares":11066},"source":{"system":"sec-edgar","filing":"0001437749-19-021208","document":"rdgdoc.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/742126/000143774919021208/rdgdoc.xml","form_type":"4"}},{"id":3384233,"issuer":{"id":154125,"kind":"organization","name":"US Ecology Holdings, Inc.","symbol":"ECOL"},"owners":[{"id":36513,"kind":"person","name":"Feeler Jeffrey R","position":1,"cik":"0001369458","reported_name":"Feeler Jeffrey R","relationship":{"director":true,"officer":true,"officer_title":"President & CEO"}}],"security":"Stock Options","published_at":"2019-11-01T12:07:40.000Z","date":"2019-11-01","kind":"disposition_to_issuer","acquired":false,"shares":6266,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F2","text":"All outstanding derivative securities of Parent, which include Options and Performance Stock Units (\"PSUs\"), were assumed by Holdco pursuant to the Merger Agreement and were converted into an equivalent number of Options and PSUs, respectively, of Holdco at an equivalent exercise price and under the same terms and conditions as the original award."},{"field":"shares","element":"transactionShares","label":"F2","text":"All outstanding derivative securities of Parent, which include Options and Performance Stock Units (\"PSUs\"), were assumed by Holdco pursuant to the Merger Agreement and were converted into an equivalent number of Options and PSUs, respectively, of Holdco at an equivalent exercise price and under the same terms and conditions as the original award."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"All outstanding derivative securities of Parent, which include Options and Performance Stock Units (\"PSUs\"), were assumed by Holdco pursuant to the Merger Agreement and were converted into an equivalent number of Options and PSUs, respectively, of Holdco at an equivalent exercise price and under the same terms and conditions as the original award."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F3","text":"These Options are fully vested and exercisable."}],"balance_after":0,"derivative":{"exercise_price":35.05,"exercise_date":"2017-01-04","expiration_date":"2026-01-03","underlying":"Common Stock","underlying_shares":6266},"source":{"system":"sec-edgar","filing":"0001437749-19-021208","document":"rdgdoc.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/742126/000143774919021208/rdgdoc.xml","form_type":"4"}},{"id":3384232,"issuer":{"id":154125,"kind":"organization","name":"US Ecology Holdings, Inc.","symbol":"ECOL"},"owners":[{"id":36513,"kind":"person","name":"Feeler Jeffrey R","position":1,"cik":"0001369458","reported_name":"Feeler Jeffrey R","relationship":{"director":true,"officer":true,"officer_title":"President & CEO"}}],"security":"Common Stock","published_at":"2019-11-01T12:07:40.000Z","date":"2019-11-01","kind":"disposition_to_issuer","acquired":false,"shares":64782,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"Disposed pursuant to that certain Agreement and Plan of Merger, dated as of June 23, 2019 (\"Merger Agreement\"), by and among US Ecology Holdings, Inc. (f/k/a US Ecology, Inc.) (\"Parent\"), NRC Group Holdings Corp., US Ecology, Inc. (f/k/a US Ecology Parent, Inc.) (\"Holdco\"), ECOL Merger Sub, Inc. (\"ECOL Merger Sub\") and Rooster Merger Sub, Inc., in a merger transaction in which ECOL Merger Sub merged with and into Parent, and each issued and outstanding share of Parent's common stock was converted into the right to receive, and became exchangeable for, one share of common stock, par value $0.01 of Holdco."}],"balance_after":0,"source":{"system":"sec-edgar","filing":"0001437749-19-021208","document":"rdgdoc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/742126/000143774919021208/rdgdoc.xml","form_type":"4"}},{"id":3616745,"issuer":{"id":154125,"kind":"organization","name":"US Ecology Holdings, Inc.","symbol":"ECOL"},"owners":[{"id":36513,"kind":"person","name":"Feeler Jeffrey R","position":1,"cik":"0001369458","reported_name":"Feeler Jeffrey R","relationship":{"director":true,"officer":true,"officer_title":"President & CEO"}}],"security":"Performance Stock Units","published_at":"2019-03-05T16:07:41.000Z","date":"2019-03-01","kind":"grant","acquired":true,"shares":6592,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"Each performance stock unit (\"PSU\") represents a contingent right to receive 1 share of US Ecology, Inc. Common Stock. The number of shares reported represents the target number of shares underlying the PSUs. The actual number of shares to be delivered in settlement of the PSUs earned during the performance period will be based on achievement of established targets with respect to the Company's Adjusted Earnings Per Share and Return on Invested Capital, each weighted at 50% of the target PSUs. After the payout under the PSUs is determined, the number of shares to be provided is subject to modification based on the percentage change in the price of the Company's common stock from January 1, 2019 to December 31, 2021, relative to the percentage change in the price of the common stock of certain peer group companies. The PSUs will settle as soon as practicable after December 31, 2021."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"Each performance stock unit (\"PSU\") represents a contingent right to receive 1 share of US Ecology, Inc. Common Stock. The number of shares reported represents the target number of shares underlying the PSUs. The actual number of shares to be delivered in settlement of the PSUs earned during the performance period will be based on achievement of established targets with respect to the Company's Adjusted Earnings Per Share and Return on Invested Capital, each weighted at 50% of the target PSUs. After the payout under the PSUs is determined, the number of shares to be provided is subject to modification based on the percentage change in the price of the Company's common stock from January 1, 2019 to December 31, 2021, relative to the percentage change in the price of the common stock of certain peer group companies. The PSUs will settle as soon as practicable after December 31, 2021."},{"field":"derivative.underlying_shares","element":"underlyingSecurityShares","label":"F1","text":"Each performance stock unit (\"PSU\") represents a contingent right to receive 1 share of US Ecology, Inc. Common Stock. The number of shares reported represents the target number of shares underlying the PSUs. The actual number of shares to be delivered in settlement of the PSUs earned during the performance period will be based on achievement of established targets with respect to the Company's Adjusted Earnings Per Share and Return on Invested Capital, each weighted at 50% of the target PSUs. After the payout under the PSUs is determined, the number of shares to be provided is subject to modification based on the percentage change in the price of the Company's common stock from January 1, 2019 to December 31, 2021, relative to the percentage change in the price of the common stock of certain peer group companies. 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