TETRA TECH, INC.

SUPERFUND TECHNICAL ASSESSMENT & RESPONSE TEAM (START V) - REGION 4. THE PURPOSE OF THIS MODIFICATION IS TO INCREASE FUNDING IN THE AMOUNT OF $350,000.00.

EMERGENCY RESPONSE ACTIVITIES (START V) - REGION 4. MODIFICATION 93; OBLIGATE FUNDS.

SUPERFUND TECHNICAL ASSESSMENT & RESPONSE TEAM (START), REGION 4 SE WOOD. MODIFICATION P00007 WILL OBLIGATE FUNDS IN THE AMOUNT OF $49,300.00.

SUPERFUND TECHNICAL ASSESSMENT & RESPONSE TEAM (START) REGION 4- SUPERFUND OFFICE. THE PURPOSE OF THIS MODIFICATION IS TO OBLIGATE FUNDS IN THE AMOUNT OF $17,344.24 AND TO INCREASE CAPACITY.

SOUTHSIDE CHATTANOOGA LEAD REMEDIAL ACTION (START). MODIFICATION TO INCREASE FUNDS IN THE AMOUNT OF $417,894.00.

SUPERFUND TECHNICAL ASSESSMENT & RESPONSE TEAM (START), - FERNWOOD OIL SITE, SITE ID C4S3. MODIFICATION 12; OBLIGATE FUNDS.

DEOBLIGATION OF FUNDS AND CLOSEOUT ACTION ON TASK ORDER UNDER START V CONTRACT 68HE0519D0006 ON CLIN 0001 IN THE AMOUNT OF $4,189.41.

TARGETED BROWNFIELDS ASSESSMENTS - MODIFICATION TO ADD ADDITIONAL FUNDING.

EMERGENCY RESPONSE ACTIVITIES (START V) - REGION 4 -TO OBLIGATE FUNDING IN THE AMOUNT OF $150,000.00

SUPERFUND TECHNICAL ASSESSMENT & RESPONSE TEAM (START V) - REGION 4. THE PURPOSE OF THIS MODIFICATION IS TO INCREASE FUNDING IN THE AMOUNT OF $600,000.00.

HURRICANE HELENE SUPPORT UNDER START V CONTRACT; MODIFICATION 2; CLOSEOUT TASK ORDER AND DEOBLIGATE REMAINING FUNDS ON CLIN 0001.

THE PURPOSE OF THIS MODIFICATION IS TO EXTEND THE PERIOD OF PERFORMANCE (POP) END DATE TO JANUARY 14, 2026 AND INCREASE FUNDING IN THE AMOUNT OF $20,737.17, AND THE CONTRACTING OFFICER REPRESENTATIVE CHANGED TO CAMERON KERR.

GEOSPATIAL SUPPORT (START V) THE PURPOSE OF THIS MODIFICATION IS TO OBLIGATE FUNDS IN THE AMOUNT OF $151,474.11 AND TO EXTEND THE PERIOD OF PERFORMANCE END DATE FROM 7/14/2025 TO 1/14/2026.

SUPERFUND TECHNICAL ASSESSMENT & RESPONSE TEAM (START) - REGION 4 - FACILITY RESPONSE PLANS/SPILL PREVENTION CONTROL AND COUNTERMEASURES FRP/SPCC - INCREASE IN FUNDING

R429: PROFESSIONAL EMERGENCY RESPONSE SUPERFUND TECHNICAL ASSESSMENT & RESPONSE TEAM (START) FOR REGION 4 GMH ELECTRONICS. THIS MODIFICATION IS TO EXTEND THE PERIOD PERFORMANCE, ADD FUNDING AND CHANGE SOW.

R429: PROFESSIONAL EMERGENCY RESPONSE FOR R4 TASK ORDER UNDER START 5 SITE ASSESSMENT ACTIVITIES FOR FAIRFIELD NEIGHBORHOOD - CLOSEOUT

SITE-SPECIFIC TASK ORDER FOR THE U.S. FIREWORKS UNDER START V CONTRACT 68HE0519D0006 TO CONDUCT AND EXPANDED SITE INSPECTION. THIS MODIFICATION IS TO DEOBLIGATE EXCESS FUNDING FOR TASK ORDER CLOSEOUT.

R4 SUPERFUND TECHNICAL ASSESSMENT & RESPONSE TEAM (START) - WESTSIDE LEAD REMEDIAL INVESTIGATION/FEASIBILITY STUDY (RIFS). FUNDING INCREASE AND PERIOD OF PERFORMANCE EXTENSION (P00006).

TASK ORDER FOR HIGH RESOLUTION SITE CHARACTERIZATION (HRSC) DNAPL SOURCE AREA STLR PROJECT. DEOBLIGATION OF FUNDS AND CLOSING OF TO.

SUPERFUND TECHNICAL ASSESSMENT & RESPONSE TEAM (START); MODIFICATION 5; OBLIGATE FUNDS AND EXTEND PERIOD OF PERFORMANCE. REGION 4- SUPERFUND OFFICE.

START PASCAGOULA AREA PFAS STUDY - DE-OBLIGATION MODIFICATION

START RRT PLANNING AND SUPPORT SERVICES - CLOSE OUT OF EXISTING TASK ORDER AND REMOVAL OF EXCESS FUNDING

FORMER TAMPA FERTILIZER SITE - CLOSE OUT OF EXISTING TO AND REMOVAL OF EXCESS FUNDING

SITE-SPECIFIC TASK ORDER FOR BIRMINGHAM URBAN BACKGROUND STUDY - DEOBLIGATION FUNDING AND CLOSE OUT OF EXISTING TO.

START HUNTER FAN MODIFICATION TO DEOBLIGATE FUNDING FOR CLOSEOUT.

SUPERFUND TECHNICAL ASSESSMENT & RESPONSE TEAM (START), REGION 4 MODIFICATION TO DEOBLIGATE FUNDING FOR CLOSEOUT.

SUPERFUND TECHNICAL ASSESSMENT & RESPONSE TEAM (START), REGION 4 - SOUTHERN LAUNDRY SITE SPECIFIC TASK ORDER (ASSESSMENT/INSPECTION ACTIVITIES) - DE-OBLIGATION AND CLOSEOUT OF TASK ORDER

START V CONTRACT WELLS CLEANER - DE-OBLIGATION AND CLOSEOUT OF TASK ORDER

SUPERFUND TECHNICAL ASSESSMENT & RESPONSE TEAM (START), REGION 4 - DE-OBLIGATION AND CLOSEOUT OF TASK ORDER

REGION 4 - SUPERFUND TECHNICAL ASSESSMENT & RESPONSE TEAM (START), SITE SPECIFIC TASK ORDER (ASSESSMENT/INSPECTION ACTIVITIES) FOR WESTSIDE LEAD -DE-OBLIGATION OF EXCESS FUNDS & TASK ORDER CLOSE OUT (P00004)

HURRICANE HELENE RESPONSE TENNESSEE UNDER START V CONTRACT. THE PURPOSE OF THIS MODIFICATION IS TO EXTEND THE PERIOD OF PERFORMANCE AND OBLIGATE FUNDS.

SUPERFUND TECHNICAL ASSESSMENT & RESPONSE TEAM (START), REGION 4, TASK ORDER FOR PROGRAM AND ADMINISTRATIVE OVERHEAD - MODIFICATION TO EXTEND THE PERIOD OF PERFORMANCE AND INCREASE FUNDING.

THE PURPOSE OF THIS MODIFICATION IS TO OBLIGATE FUNDS IN THE AMOUNT OF $65,118.90 AND TO EXTEND THE PERIOD OF PERFORMANCE END DATE TO 07/14/2025.

MODIFICATION TO ADD FUNDING IN THE AMOUNT OF $160,000.00 AND TO EXTEND THE PERIOD OF PERFORMANCE FROM 1/14/2025 TO 2/28/2025.

68HE0519D0006 68HE0419F0082 START V; REGION 4. THIS TASK ORDER MODIFICATION IS TO OBLIGATE FUNDING IN THE AMOUNT OF $250,000.00.

THIS TASK ORDER IS FOR HURRICANE HELENE SUPPORT UNDER R4 START V CONTRACT #68HE0519D0006, TO OBLIGATE FUNDS IN THE AMOUNT OF $50,000.00, EXTEND THE COMPLETION DATE TO 12/28/24, AND ASSIGN A TOCOR.

R4 START V CONTRACT; WOOLFOLK CHEMICAL CORPORATION SITE. THE PURPOSE OF THIS MODIFICATION IS TO OBLIGATE FUNDING IN THE AMOUNT OF $590,190.01, ATTACH REVISED STATEMENT OF WORK AMENDMENT# 2, AND CHANGE THE TOCOR.

INITIATION OF EMERGENCY RESPONSE TASK ORDER FOR HURRICANE HELENE RESPONSE TENNESSEE UNDER START V CONTRACT 68HE0519D0006 AND OBLIGATE FUNDS IN THE AMOUNT OF $50,000.

THE INITIATION OF EMERGENCY RESPONSE TASK ORDER FOR HURRICANE HELENE SUPPORT UNDER R4 START V CONTRACT #68HE0519D0006 AND ADD FUNDING IN THE AMOUNT OF $30,000.00.

THE INITIATION OF EMERGENCY RESPONSE TASK ORDER FOR HURRICANE HELENE RESPONSE UNDER R4 START V CONTRACT 68HE0519D0006 AND ADD FUNDING IN THE AMOUNT OF $400,000.00. MISSION ASSIGNMENT 4827DR-NC-EPA-02 FOR THE HURRICANE HELENE RESPONSE.

THE INITIATION OF EMERGENCY TASK ORDER FOR HURRICANE HELENE LANDFILL STRIKE TEAM UNDER START V CONTRACT 68HE0519D0006 AND ADD FUNDING IN THE AMOUNT OF $30,000.00.

SOUTHSIDE CHATTANOOGA LEAD REMEDIAL ACTION (START), OBLIGATE FUNDS IN THE AMOUNT OF $509,676.86 AND SEE THE AMENDED STATEMENT OF WORK.

REGION 4, (START V); 68HE0519D0006 68HE0419F0096 P00034. THE PURPOSE OF THIS MODIFICATION IS TO OBLIGATE ADDITIONAL FUNDS AND INCREASE THE TASK ORDER CEILING.

68HE0519D0006 68HE0419F0082 START V; REGION 4. THIS TASK ORDER MODIFICATION IS TO OBLIGATE FUNDING IN THE AMOUNT OF $200,000.00.

SUPERFUND TECHNICAL ASSESSMENT & RESPONSE TEAM (START V), REGION 4. THE PURPOSE OF THIS TASK ORDER MODIFICATION IS TO OBLIGATE FUNDS IN THE AMOUNT OF $200,000.

SUPERFUND TECHNICAL ASSESSMENT & RESPONSE TEAM (START V), REGION 4. THE PURPOSE OF THIS MODIFICATION IS TO INCREASE FUNDING IN THE AMOUNT OF $263,410.83.

SOUTHSIDE CHATTANOOGA LEAD REMEDIAL ACTION (START), OBLIGATE FUNDS IN THE AMOUNT OF $1,051,487.04 AND ATTACHED THE AMENDED STATEMENT OF WORK.

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

RESPONSE ACTIVITIES - ER OIL

(START), REGION 4, CLOSEOUT TASK ORDER/DE-OBLIGATE FUNDS.