Final Report – Remedial Investigation Report Addendum- for Group 4 Sites Remedial Investigation Report, Sites 04, 08, 67, and Hydrocarbon Study at the Longhom Army Ammunition Plant (LHAAP), Karnack, Texas Final Report – Remedial Investigation Report Addendum- for Group 2 Sites Remedial a Investigation Report, Site 49 at the Longhorn Army Ammunition Plant (LHAAP), Karnack, Texas