Helium Report for Month of December 1999 Users Amount %ofTtl Recovrd Lost % Lost $$$$$$ Adams 285 4% 230 55 19% $280.00 Andraka 53 1% 53 0 0% $26.50 Angerhofer 0 0 0 $0.00 B122 260 4% 260 0 0% $130.00 B155 213 3% 206 7 3% $124.00 Chemistry 505 8% 411 94 19% $1,245.00 Graybeal 0 0 0 $0.00 Hebard 219 3% 214 5 2% $122.00 Ihas 0 0 0 $0.00 Meisel 124 2% 114 10 8% $87.00 MKBay#1 1176 17% 1069 107 9% $855.50 MKBay#2 1090 16% 1027 63 6% $702.50 MKBay#3 2057 31% 1986 71 3% $1,206.00 Reitze 0 0 0 $0.00 Sharifi 205 3% 189 16 8% $142.50 Stewart 10 0% 10 0 0% $5.00 Sullivan 398 6% 394 4 1% $209.00 Takano 0 0 0 $0.00 Tanner 126 2% 103 23 18% $120.50 Telesco 23 0% 0 23 100% $103.50 W129 0 0 0 $0.00 ================================================================= TOTAL 6721 455 $5,255.50 Lost 522 Liquid liters Lost / day 17 Liquid liters Usage lost 8% Recovered at Master Meter 7530 Liquid liters Recovery rate 93% Transfers 56 $ amount is billed at $.50/lL used for physics or $2.00/lL for non-physics plus $2.50/lL lost.