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ME <br /> March 24,2025 <br /> Mr.Daniel Moher <br /> EPA TBA Project Manager(s) <br /> U.S.Environmental Protection Agency,Region 9 <br /> 75 Hawthorne Street <br /> San Francisco,California 94105 <br /> Subject: Final Sampling and Analysis Plan and Quality Assurance Project Plan Addendum <br /> Targeted Brownfields Assessment at Lodi-125 N Stockton <br /> U.S.EPA Region 9,Resource Conservation and Recovery Act(RCRA) Enforcement, <br /> Permitting, and Assistance (REPA) Contract No. 68HERH19D0018,Task Order No. <br /> 68HE0922F0038 <br /> Dear Mr.Moher: <br /> Toeroek Associates,Inc. (Toeroek) and Tetra Tech,Inc. (Tetra Tech) (hereafter"Toeroek Team") are <br /> submitting the attached Final Sampling and Analysis Plan(SAP) and Quality Assurance Project Plan (QAPP) <br /> Addendum for a Targeted Brownfields Assessment(TBA) at the Lodi-125 N Stockton site. <br /> This deliverable has been revised to reflect EPA's comment on the draft SAP and QAPP Addendum. <br /> Extraction methods were added for TPH-d/TPH-mo and PAHs.This deliverable has been reviewed <br /> internally as part of Tetra Tech's quality assurance program,as well as Toeroek's quality assurance program <br /> and is consistent with Toeroek's Quality Management Plan for the REPA contract.Documentation of this <br /> review is retained in the Toeroek Team's project files. <br /> If you have any questions or comments,please contact Greg Hanna at(720) 898-4102 or Cynthia Breene at <br /> (510) 302-6341. <br /> Sincerely, <br /> Greg Hanna Cynthia Breene <br /> Toeroek Team Program Manager Toeroek Team Project Manager <br /> Enclosure: Final SAP and QAPP Addendum <br /> cc: Scott Stollman,EPA Region 9 TOCOR <br /> Jinky Callado,EPA Region 9 Alternate TOCOR <br /> Audrey L.Johnson,EPA Region 9 QA Manager <br /> Toeroek Team files <br />