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1993, 1994 AHR Responses (#2) February 6, 1997 Page 3 The request to submit laboratory reports and chain-of-custody forms will be addressed in the responses to the Division's request for a revision to improve the hydrologic monitoring program (letter also dated December 9, 1996). 12. The initial footnote No. 1 has been modified on pages 2, 3, and 5 of 6, and all of Table H- 1 has been revised for your incorporation into the AHR. 17. The baseline minimum and maximum values have been relabeled on Table F-1 for the Jumbo Spring No. 6 Pond. 19. TSS was not collected for GP-1 during baseline sampling. TSS is not a standazd measure of ground water quality and has subsequently been removed from the ground water monitoring program. As a consequence, MCC has not modified the Table. 22. The baseline data for the North Fork of the Gunnison sites were collected from 1977 through 1980, seventeen to twenty years ago. The Division's suggestion is valid that reseazch (and verification) into the baseline iron and manganese concentrations should examine the original source (i.e., the original laboratory sheets). However, MCC also has to assume that the data from the laboratory data sheets has been correctly transferred to the tables in the AHR and that if there were any errors, the Division would have noted the errors at the time the data was submitted. MCC observes that many of the original data sheets provided by laboratories did not specify whether the metal was analyzed in its dissolved or total forms. The earlier data reflects such small concentrations that most likely the samples were filtered and the dissolved form reported. In addition, the 6.96 mg/l of iron was measured during spring runoff during a year in which there was an above normal snowpack. Iron during this time was measured in its total form; and therefore, the higher concentration is likely due to the high amount of sediment in the river. Impacts are more appropriately observed during low flow conditions. MCC now collects iron in its dissolved form as well as total iron (per TR#71). As MCC was again reviewing the laboratory sheets and the AHR tables, an error was noted on Table E-1 and a corrected table is provided. MCC intends continued compliance with our monitoring program and the Regulations. The missed parameters were not intentional, but human error. Human error is also the reason for the errors in transcribing the data from the laboratory data sheets to the AHR tables, and MCC apologizes for any confusion these errors may have caused. MCC is currently working on a better tracking system to verify that all required samples and analyses are completed on the numerous resources monitored.