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3.1.2 Cavity Production <br />Tahle 'i_1 <br /> Cavity Cavity Cavity Cavity Cavity Cavity Cavity Cavity <br /> #1 #2 #3 #lA #3A #4A #SH #6H <br />Tons in 0 0 0 8,410 0 0 22,020 68,635 <br />2007 <br />Total tons 55,675 54,784 49,433 296,345 155,042 145,895 135,334 273,781 <br />1991-2006 <br />3.1.3 2007 Monthly Production Tons Summary <br />TahlP Z 7 <br /> Inventory <br />Calculation <br /> <br />Month Beginning <br />Inventory <br />Production <br />Shipments Ending <br />Inventory Stored <br />product Product <br />in Transit <br />Januar 6751 7550 8794 4658 3300 1358 <br />Februa 4658 8091 8404 4368 2978 1390 <br />March 4368 7669 8408 3609 2610 999 <br />A ril 3609 8422 8989 3046 2251 795 <br />Ma 3046 9174 8195 4161 3385 775 <br />June 4161 7090 8299 2952 1902 1050 <br />Jul 2952 8769 8604 3116 2517 599 <br />Au ust 3116 7019 8151 1984 1348 636 <br />Se tember 1984 8600 7924 2660 1797 863 <br />October 2660 10092 9213 3540 2349 1191 <br />November 3540 8760 8981 3321 2322 999 <br />December 3321 7829 7449 3702 2875 828 <br />TOTALS 99065 101410 <br />3.1.4 Regulatory Review <br />NSI submitted routine Sundry Notices, monthly, quarterly, and annual reports to appropriate <br />agencies. The following summarizes regulatory related activities: <br />• In the well field: a Sundry Notice was submitted for drilling SH-1V; no wells were plugged or <br />abandoned. A drilling consultant has been reviewing options for bringing the 7H well pair into <br />production. <br />• There were no undesirable events. <br />• New pressure transducers and data loggers were installed in 13 monitor wells. <br />• Eleven site inspections by the BLM and one inspection by the EPA were performed. <br />• Cavity 1 A was retired. <br />4 <br />