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

Stabilization measures below the deleted TA-16 Building 260 Outfalleliminated after cessation of source activities and processes or redirecting flows to other outfalls, primarily tothe sanitary system. Most of the reductions (9 of the 16) during 1999 were the result of transferring the watersupply system from the DOE to Los Alamos County. Those outfalls were removed from LANL’s NPDESpermit and added to the Los Alamos County NPDES permit application. Four other water supply wells weretaken out of production, their pumping equipment removed, and their outfalls eliminated.This major modification project, elimination and/or rerouting of NPDES outfalls, was completed in 1999,bringing the total number of permitted outfalls down from the 55 identified by the SWEIS ROD to 20. During2000, Outfall 03A-199, which will serve the TA-3-1837 cooling towers, was included in the new NPDESpermit issued by EPA on December 29, 2000; however, the effective date of the permit was February 1,2001. This brings the total number of permitted outfalls up to 21. This new outfall (03A-199) will dischargeto an unnamed tributary of Sandia Canyon and will be included in future totals for the Non-Key Facilities.It has yet to discharge. While the volume of water discharged by the Laboratory in CY 2000 was reducedoverall, the largest apparent reductions were primarily attributed to fewer outfalls being reported under theLaboratory’s NPDES permit coupled with more accurate record keeping.3.3 Solid Radioactive and Chemical WastesBecause of the complex array of facilities and operations, LANL generates a wide variety of waste typesincluding solids, liquids, semi-solids, and contained gases. These waste streams are variously regulated assolid, hazardous, low-level radioactive, TRU, or wastewater by a host of State and Federal regulations. Theinstitutional requirements relating to waste management at LANL are located in a series of documents thatare part of the Laboratory Implementation Requirements. These requirements specify how all process wastesand contaminated environmental media generated at LANL are managed. Wastes are managed from planningfor waste generation for each new project through final disposal or permanent storage of those wastes. ThisSWEIS Yearbook—2002 3-9