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200311928 • EXHIBIT ••B'• Notification of Hazardous Substance Storage, Release, and Disposal Property Name of Date of Storage, Remedial Actions Description Hazardous Substance(s) Release or Disposal Sludge Pit - STPSI-004 - Benzo(b)fluoranthene STP we constructed in 1942 and Regulators concur no further remedial action is Sewage Treatment Plant 0.042 u /g) was in use until 1974 when the required as concentrations did not exceed the served the Administration Inorganic including system was replaced by a Residential RBC and Nebraska Department of Environ- _ Area, Staff Housing Area, Cadmium Cd Copper stabilization lagoon. mental Oualit NDEO guidance on soil for and Fire and Guard (Cu), Lead (Pb), Mercury Released Benzo(b)fluoranthene. None of the inorganic Headquarters. H Silver A exceeded the Industrial or Residential RBC. Record Selenium Se and of Decision ROD Operable Unit Two 01-12 . Zinc Zn Sludge Pit - Soll Boring PAHS - acenaphthene STP we constructed in 1942 and Regulators concur no further remedial action is SPSBO3 (0.249 - 1.06 ug /g) and was in use until 1974 when the is required as concentrations did not exceed Sewage Treatment Plant fluorene 0.0164 - 0 0288 system was replaced by a the Industrial or Residential RBC. Record of Decision served the Administration u /q) stabilization lagoon. ROD Operable Unit Two 01-12 Area. Staff Housing Area, Released and Fire and Guard Headquarters Drainage Ditch - STPSE003 Explosive compounds, STP we constructed in 1942 and Regulators concur no further remedial action is and SPSI-03 ' HMX (0.312 ug /g) and was in use until 1974 when the required as concentrations did not exceed the Sewage Treatment Plant RDX 0.295 s stem was re laced by a Residential RBCs for HMX or RDX. Regulators also _ served the Administration Inor anic including stabilization lagoon concur no further remedial action is required as all _ Area Staff Housing Area, Arsenic (As) - 4.84 ug /g, Released inorganic were below Residential RBC's with the and Fire and Guard Cadmium Cd Cobalt Co exception of As 4.84 u /g) which exceeds the Headquarters. Cooper (Cu), Lead (Pb), Industrial RBC. Record of Decision ROD O erable Mercury (Hg), Silver (A g), Unit Two 01-12 . Selenium Se and Zinc Zn Evaporation Pond - SPSB02 Aluminum (Al), Arsenic (As), STP we constructed in 1942 and Regulators concur no further remedial action is Sewage Treatment Plant Barium Ba , Cadmium Cd was in use until 1974 when the re uhed as concentrations in all Inor anic were below served the Administration Calcium (Ca), Chromium Cr s stem was re laced b a Residential RBCs with the exception of As 5 35u /gL_ Area Staff Housing Area Cobalt (Co), Copper (Cu), stabilization lagoon. (which exceeds the Industrial RBC. Record of Decision and Fire and Guard Lead (Pb), Selenium (Se), Released (ROD) Operable Unit Two (OU2). Headquarters Silver A Vanadium and _ Zinc (Zn). Groundwater Inorganic - Arsenic (12.9 ug /L). STP we constructed in 1942 and Regulators concur no further remedial action is Sewage Treatment Plant Se (119.0 u /L and Ex losive - was in use until 1974 when the required due to low concentrations of inorganic. served the Administration 12NT 0.304 u /L) system was replaced by a 2NT does not exceed the Tap Water RBC for this _ Area. Staff Housing Area, 'stabilization lag oon. com pound. Record of Decision (ROD) Operable and Fire and Guard Released Unit Two (OU2). Headquarters I i I _ Determined and Prepared by Title: Location. Ms. Jo Short Realty Specialist IGrand Island, Nebraska 68803 EXHIBIT "B"