TETRA TECH, INC.

REGION 4 START VI SUPERFUND GEOSPATIAL SUPPORT

AWARD SUPERFUND TECHNICAL ASSESSMENT&RESPONSE TEAM 5TH GENERATION (START V) REQUIREMENT FOR NATIONALLY CONSISTENT SERVICES TO EPA ON-SCENE COORDINATORS (OSCS) AND OTHER FEDERAL OFFICIALS IMPLEMENTING EPA'S RESPONSIBILITIES UNDER THE NATION

REGION 4 START VI REMOVAL SITE EVALUATIONS

INITIATE NEW TIME-CRITICAL REMOVAL ACTIONS BULK FUNDED TASK ORDER UNDER START 5 CONTRACT #68HE0519D0006 (TETRA TECH) TO IMPLEMENT UTILIZING TOLINS. THIS IS SPECIFIC TO SECTION II.A RESPONSE ACTIVITIES AND APPENDIX A (A) SPECIFIC TASK LIST REMOVAL SIT

SOUTHERN SOLVENTS SITE TASK ORDER TO CONDUCT OVERSIGHT ACTIVITIES RELATED TO THE REMEDIAL ACTION. BIL FUNDING.

INITIATE SITE-SPECIFIC TASK ORDER (ASSESSMENT/INSPECTION ACTIVITIES) FOR WESTSIDE LEAD REMEDIAL INVESTIGATION/FEASIBILITY STUDY (RIFS) UNDER START V CONTRACT 68HE0519D0006.

REGION 4 START VI SUPERFUND FACILITY RESPONSE PLANS (FRP) AND SPILL PREVENTION CONTROL AND COUNTERMEASURES (SPCC)

REGION 4 START VI SUPERFUND REMOVAL ACTIONS CERCLA

REGION 4 START VI PREPAREDNESS AND PREVENTION ACTIVITIES

REGION 4 SUPERFUND TECHNICAL ASSESSMENT & RESPONSE TEAM VI CONTRACT

R4 START VI EMERGENCY RESPONSE CERCLA ACTIONS

SUPERFUND TECHNICAL ASSESSMENT&RESPONSE TEAM (START), REGION 4, PROGRAM AND ADMINISTRATIVE TASKS: CONTRACT TASKS, RESPONSE AND READINESS TASKS.

R4 START VI WESTSIDE LEAD TASK ORDER

ALARIC TASK ORDER 68HE0420F0048 UNDER THE START V CONTRACT 68HE0519D0006. THE PURPOSE OF THIS MOD IS TO EXTEND THE TASK ORDER PERIOD OF PERFORMANCE FROM 7/14/2026 TO 10/14/2026, PER THE AUTHORITY OF RFO FAR 52.237-3, CONTINUITY OF SERVICES

SUPERFUND TECHNICAL ASSESSMENT & RESPONSE TEAM (START) - REGION 4 - FACILITY RESPONSE PLANS/SPILL PREVENTION CONTROL AND COUNTERMEASURES FRP/SPCC. THE PURPOSE OF THIS MOD IS TO EXTEND THE TASK ORDER PERIOD OF PERFORMANCE FROM 7/14/26 TO 10/14

SOUTHSIDE CHATTANOOGA LEAD REMEDIAL ACTION (START). THE PURPOSE OF THIS MODIFICATION IS TO EXTEND THE TASK ORDER PERIOD OF PERFORMANCE FROM 7/14/2026 TO 10/14/2026, PER THE AUTHORITY OF RFO FAR 52.237-3, CONTINUITY OF SERVICES

REGION 4. SUPERFUND TECHNICAL ASSESSMENT & RESPONSE TEAM (START). MODIFICATION 7; THE PURPOSE OF THIS MODIFICATION IS TO EXTEND THE TASK ORDER FROM 07/14/2026 TO 10/14/2026.

GEOSPATIAL SUPPORT (START V) THE PURPOSE OF THIS MODIFICATION IS TO EXTEND THE TASK ORDER PERIOD OF PERFORMANCE FROM 7/14/2026 TO 10/14/2026, PER THE AUTHORITY OF RFO FAR 52.237-3, CONTINUITY OF SERVICES

REGION 4, (START); MODIFICATION 12; THE PURPOSE OF THIS ADMINISTRATIVE MODIFICATION IS TO CORRECT THE LINE-ITEM END DATE FROM 01/14/2026 TO 07/14/2026.

REGION 4 SUPERFUND TECHNICAL ASSESSMENT & RESPONSE TEAM VI CONTRACT - PROGRAM AND ADMINISTRATIVE TASK ORDER

START REGION 4 ABC CLEANERS

SUPERFUND TECHNICAL ASSESSMENT & RESPONSE TEAM (START) - REGION 4

SUPERFUND TECHNICAL ASSESSMENT & RESPONSE TEAM (START), REGION 4; CONTRACT 68HE0519D0006 68HE0525F0022 - HURRICANE HELENE RESPONSE TENNESSEE.

SUPERFUND TECHNICAL ASSESSMENT & RESPONSE TEAM (START) REGION 4- SUPERFUND OFFICE.

SUPERFUND TECHNICAL ASSESSMENT & RESPONSE TEAM (START), REGION 4. MISSION ASSIGNMENT 4827DR-NC-EPA-02 FOR THE HURRICANE HELENE RESPONSE.