131 LA UR 03 5862 - National Nuclear Security Administration ...

for 1998 to 2001 (LANL 1999a, 2000, 2001, and 2002a) show that outfall quality is within the parametersidentified. In particular, nitrate concentrations in the RLWTF outfalls have been within NPDES limits since1998.4.3 Solid Radioactive and Chemical WastesWastes have been generated at levels below quantities projected by the SWEIS ROD with the exception ofER Project chemical wastes. For three of the last five years, ER Project wastes (see Table 3.3.2-1) have beengenerated at levels at least seven times the SWEIS projection. ER Project wastes are typically shipped offsitefor disposal at EPA-certified waste treatment, storage, and disposal facilities and do not impact local environs.These wastes result from exhumation of materials placed into the environment during the early history ofLANL and thus differ from the newly created wastes from routine operations. Figure 4-10 compares theannual LANL chemical waste generation to the SWEIS ROD projections.Thousands of Kilograms30,00025,00020,00015,00010,0005,0000Figure 4-10. LANL chemical waste generation.As a result of the uncertainty in ER Project waste estimates, the Yearbook presents totals for LANL wastegeneration both with and without the ER Project. As shown in tables in Section 3.3, except for chemicalwastes, total generated amounts fall within projections made by the SWEIS ROD. This Yearbook alsopresents total volumes of solid sanitary waste for the first time.Technical Area 54SWEIS Yearbook—2002 4-7