TABLE 2: Current and Previous Emission Levels
sample_tscur_valprev_val
2002-05-15 11:35:00.00013NULL
2002-05-15 11:35:10.0007713
2002-05-15 11:35:20.0008177
2002-05-15 11:35:30.0001981
2002-05-15 11:35:40.0002519
2002-05-15 11:35:50.0002425
2002-05-15 11:36:00.0004524
2002-05-15 11:36:25.0004445
2002-05-15 11:37:35.0007544
2002-05-15 11:38:15.0008275
2002-05-15 11:38:45.0009282
2002-05-15 11:39:01.0005092
2002-05-15 11:39:22.0007350
2002-05-15 11:39:52.0007473
2002-05-15 11:40:22.0007574
2002-05-15 11:40:52.0006575