Letter & Final Report – Final Technical Memorandum — Modeling Approach for Derivation of Soil and Groundwater Concentrations Protective of Surface Water and Sediment, for the Longhorn Army Ammunition Plant (LHAAP), Karnack, Texas Author. Praveen Srivastav, Deputy Project Manager / Technical Lead, Shaw Environmental & Infrasturcture, Inc., Houston, Texas Recipient. | Andy Obrochta, U.S. Army Corps of Engineers (USACE), Tulsa District Meeting — Monthly Managers Meeting on the Longhorn Army Ammunition Plant (LHAAP), Karnack, Texas — Meeting held at EPA Region 6 Headquarters, Dallas, Texas