Cumulative committed 1D outfall transfers, independent of REPORT_START. Positive exports have already left SWMM: consumers must not withdraw them again. Reverse water is retained separately and is not a one-way export. SI water is m3; heat is J relative to 0 degC using model rho/cp. Pollutant arrays use kg for MG/L and UG/L, and counts for #/L. Read units first. Flags: 1 external water, 2 LEGACY pollutant loads, 4 native heat. Route-to-subcatchment and native 2D-owned outfalls are refused. No MSX or ARD/LARD mass capability is implied by these receipts.