TOEROEK ASSOCIATES, INC.

THE PURPOSE OF THIS MODIFICATION IS TO DE-OBLIGATE UNUSED FUNDS FROM THIS TASK ORDER.

RESOURCE CONSERVATION AND RECOVERY ACT (RCRA) ENFORCEMENT, PERMITTING AND ASSISTANCE (REPA) 6, ZONE 3, REGION 7 - IA INSPECTIONS 2023/2024 MOD. 4: DEOBLIGATE EXCESS FUNDS AND CLOSE OUT TASK ORDER

REPA R7 - TECHNICAL SUPPORT FOR OMIS, CMES AND FIVE-YEAR REVIEWS MOD P00002: EXTEND THE PERIOD OF PERFORMANCE TO MAY 13, 2025, ADD AN ADDITIONAL FACILITY AND ADD FUNDING IN THE AMOUNT OF $9,792.23.

DEOBLIGATION EXCESS FUNDS IN THE AMOUNT OF $339.96 CLOSE TASK ORDER

DEOBLIGATE EXCESS FUNDS IN THE AMOUNT OF $3,965.01 CLOSE TASK ORDER

DEOBLIGATE EXCESS FUNDS IN THE AMOUNT OF $544.17 CLOSE TASK ORDER

DEOBLIGATE EXCESS FUNDS IN THE AMOUNT OF $1,204.13 DECREASE CEILING CAPACITY TO ALIGN WITH TOTAL EXPENDITURE AMOUNT OF $188,167.87 CLOSE TASK ORDER

DEOBLIGATE EXCESS FUNDS IN THE AMOUNT OF $4.95 REMOVE EXCESS CAPACITY TO ALIGN WITH THE EXPENDITURE AMOUNT OF $39,995.05 CLOSE TASK ORDER

DEOBLIGATE EXCESS FUNDS IN THE AMOUNT OF $5.19 CLOSE TASK ORDER

DEOBLIGATE EXCESS FUNDS IN THE AMOUNT OF $1,169.64 ALIGN CAPACITY TO TOTAL EXPENDED AMOUNT OF $263,830.36 CLOSE TASK ORDER

DEOB EXCESS FUNDS IN THE AMOUNT OF $246.57 CLOSE TASK ORDER

DEOBLIGATE EXCESS FUNDS IN THE AMOUNT OF $28.96 DEOBLIGATE EXCESS UNFUNDED CAPACITY. CLOSE TASK ORDER.

DEOBLIGATE REMAINING FUNDS FROM CLIN 3001 IN THE AMOUNT OF $10,552.74 CANCEL CLIN 4001 AS THE OPTION YEAR WAS NOT REQUIRED.

THIS IS TO EXTEND POP THRU 11/14/24 FOR TO 68HE0920F0007 (TARGETED BROWNFIELDS ASSESSMENT 1) CONTRACT #68HERH19D0018 TOEROEK

R7: RCRA COST ESTIMATION ANALYSIS SUPPORT - RESOURCE CONSERVATION AND RECOVERY ACT (RCRA) ENFORCEMENT, PERMITTING AND ASSISTANCE (REPA) 6, ZONE 3, REGION 7 MODIFICATION P00002: THE PURPOSE OF THIS MODIFICATION IS TO DE-OBLIGATE EXCESS FUNDS AND TO C

REPA 6 ZONE 2 - EPA REGIONS: 4, 5, 6 AND 8 TASK ORDER FOR RB RCRA CORRECTIVE ACTION REMEDIAL PROJECT TECHNICAL SUPPORT FOR U.S. STEEL - GARY WORKS. MOD TO DEOBLIGATE FUNDS

MODIFICATION TO EXTEND POP THRU 11/14/24 FOR TO68HE0922F0038 (TARGETED BROWNFIELDS ASSESSMENT 2) CONTRACT #68HERH19D0018 TOEROEK

RESOURCE CONSERVATION AND RECOVERY ACT (RCRA) ENFORCEMENT, PERMITTING AND ASSISTANCE (REPA) 6 ZONE 3 - EPA REGIONS: 2, 7, 9 AND 10

THE CONTRACTOR SHALL PROVIDE TECHNICAL SUPPORT IN THE REVIEW, ANALYSIS, ASSESSMENT, AND PREPARATION OF DOCUMENTS RELATED TO CORRECTIVE ACTION, PERMITTING, CLOSURE, POST CLOSURE AND ENFORCEMENT ACTIVITIES UNDER RCRA OR TSCA.

EPA REGION 6 RESOURCE CONSERVATION AND RECOVERY ACT (RCRA) ENFORCEMENT, PERMITTING AND ASSISTANCE (REPA) 6 ZONE 2: FLIR OGI CAMERA 2023 FLYOVER PROJECT

CERCLA ENFORCEMENT SUPPORT - TRI-STATE MINING DISTRICT SUPERFUND RAILROAD LINE SITES PRP SEARCH MOD P00003 ADD LOE FOR PHASE II OF PRP SEARCH AND PERIOD OF PERFORMANCE EXTENSION

R7 CERCLA ENFORCEMENT SUPPORT: SOUTHEAST MISSOURI MINING SUPERFUND RAILROAD LINE SITES PRP SEARCH MOD P00003 ADD LOE FOR PHASE II OF RAILROAD PRP SEARCH AND PERIOD OF PERFORMANCE EXTENSION

EXCESS FUNDS IN THE AMOUNT OF $41,204.47 ARE HEREBY DEOBLIGATED FROM 2001 AND 2001B. UPON PAYMENT OF THE FINAL INVOICE, THE ORDER IS CLOSED.

R10 CERCLA ENFORCEMENT SUPPORT: DEER TRAIL MINE AND MILL POTENTIALLY RESPONSIBLE PARTY (PRP) SEARCH

R7 CERCLA ODMB PRP SEARCH

EPA REGION 8 LITIGATION SUPPORT AND POTENTIALLY RESPONSIBLE PARTY (PRP) SEARCH ACTIVITIES AT THE BONITA PEAK MINING DISTRICT SITE

THIS TASK ORDER (TO) IS FOR THE TECHNICAL ASSISTANCE FOR DESOTEC PROJECT IN REGION 9.

R10 CERCLA ENFORCEMENT SUPPORT: BREMERTON GASWORKS POTENTIALLY RESPONSIBLE PARTY (PRP) SEARCH

US EPA, REGION 7 RCRA IOWA INSPECTIONS

TASK ORDER CHEMETCO

R5 RCRA CORRECTIVE ACTION SUPPORT CONTRACT (REPA INTERIM CONTRACT)

R10 CERCLA ENFORCEMENT SUPPORT: HARBOR ISLAND EAST WATERWAY PRP SEARCH

THE PURPOSE OF THIS MODIFICATION IS TO ADD INCREMENTAL FUNDING TO THE TASK ORDER.

REGION 8 CERCLA LIMITED ENFORCEMENT SUPPORT TASK ORDER/ CONTRACT # 68HE0922D0002 WITH TOEROEK ASSOCIATES, INC - THIS TASK ORDER IS DESIGNED TO SUPPORT THE REMOVAL, REMEDIAL, AND SITE ASSESSMENT PROGRAMS WITH URGENT, SHORT-TERM REQUESTS.

CERCLA ENFORCEMENT SUPPORT CONTRACT 68HE0922D0002 OPTION YEAR 3 EXIDE VERNON. THE PURPOSE OF THIS MODIFICATION IS TO ADD INCREMENTAL FUNDING TO THE TASK ORDER.

CERCLA ENFORCEMENT SUPPORT CONTRACT 68HE0922D0002 OPTION YEAR 3 ORANGE COUNTY NORTH BASIN (OCNB).THE PURPOSE OF THIS MODIFICATION IS TO ADD INCREMENTAL FUNDING TO THE TASK ORDER.

THE PURPOSE OF THIS MODIFICATION IS TO ADD ADDITIONAL ALTERNATIVE TASK ORDER OFFICER REPRESENTATIVES TO THIS TASK ORDER. THE PURPOSE OF THIS MODIFICATION IS TO ADD INCREMENTAL FUNDING TO THE TASK ORDER.

THE PURPOSE OF THIS MODIFICATION IS TO ADD INCREMENTAL FUNDING TO THE TASK ORDER.

CERCLA ENFORCEMENT SUPPORT CONTRACT 68HE0922D0002, OPTION YEAR 3, SAN FERNANDO VALLEY POLLOCK (SFV POLLOCK). THE PURPOSE OF THIS MODIFICATION IS TO ADD INCREMENTAL FUNDING TO THE TASK ORDER.

THE PURPOSE OF THIS MODIFICATION IS TO ADD INCREMENTAL FUNDING TO THE TASK ORDER.

CERCLA ENFORCEMENT SUPPORT CONTRACT 68HE0922D0002, OPTION YEAR 3, SOUTH INDIAN BEND WASH, SIBW. THE PURPOSE OF THIS MODIFICATION IS TO ADD INCREMENTAL FUNDING TO THE TASK ORDER.

RESOURCE CONSERVATION AND RECOVERY ACT (RCRA) ENFORCEMENT, PERMITTING AND ASSISTANCE (REPA) 6 ZONE 2 - EPA REGIONS: 4, 5 AND 6, TASK ORDER 5615 CORRECTIVE ACTION SUPPORT - USS SOUTH WORKS, UNIVAR, PSC METALS; THE PURPOSE OF THIS MODIFICATION IS TO DE

R10 REPA 6 ZONE 3: REGION 10 NORTH SLOPE BOROUGH COMPLIANCE SUPPORT. MOD P00007: DEOBLIGATE EXCESS FUNDING AND TASK ORDER CLOSE-OUT.

R10 REPA 6 ZONE 3: REGION 10 NEPA COMPLIANCE SUPPORT AT CONTAMINATED ALASKA NATIVE CLAIMS SETTLEMENT ACT (ANCSA) LANDS. MOD P00004: DEOBLIGATION AND CLOSEOUT

EPA 6, REGION 5, TASK ORDER FOR CORRECTIVE ACTION SUPPORT FOR QUEMTCO, INC. INDIANAPOLIS, IN; BASF NORTH WORKS WYANDOTTE, MI; AMPHENOL CORP. FRANKLIN, IN; BASF CLEVELAND, COUNTRYMARK AND TECUMESH. THE PURPOSE OF THIS MODIFICATION IS TO DE-OBLIGATE $2

REGION 7 TARGETED BROWNFIELDS ASSESSMENT (RAF-ESO) P00005 - FULLY FUNDS LINE ITEM 0001.

REPA 6, REGION 5, TASK ORDER FOR CORRECTIVE ACTION SUPPORT AT AK STEEL-MANSFIELD, AK-STEEL MIDDLETOWN, AK-ZANESVILLE, REFINED METALS, AMERICAN METALS, US GREAT LAKES. THE PURPOSE OF THIS MODIFICATION IS TO DE-OBLIGATE $51,999.50 FROM 2405QFX503. THE

REPA) 6, ZONE 2 - EPA REGIONS: 4, 5, 6 AND 8, TASK ORDER FOR RB RCRA CORRECTIVE ACTION REMEDIAL PROJECT TECHNICAL SUPPORT FOR CA725 DETERMINATIONS AT MULTIPLE FACILITIES. THE PURPOSE OF THIS MODIFICATION IS TO DE-OBLIGATE $20,639.58 FROM 2405QFX507.

(REPA) 6, ZONE 2 - EPA REGIONS: 4, 5, 6 AND 8, TASK ORDER FOR RB RCRA CORRECTIVE ACTION REMEDIAL PROJECT TECHNICAL SUPPORT FOR NON-BASELINE & CA SITES: THE PURPOSE OF THIS MODIFICATION IS TO DE-OBLIGATE $22,477.06 FROM 2405QFX508. THE TOTAL CEILI

THE PURPOSE OF THIS MODIFICATION IS TO DE-OBLIGATE $12,901.00 FROM 2405QFX509. THE TOTAL CEILING AMOUNT DECREASED FROM $284,203.18 TO $271,302.18