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1988 preblast survey area, the preblast survey area that is associated with the 1990 permit <br />• revision, and dwelling locations. As can be seeri, the survey areas are nearly identical, and the <br />dwellings that require a condition survey were surveyed in 1988. The 1998 area associated <br />with the II-W South Extension Area shows no new dwellings. The closest dwellings occur <br />along Sage Creek Road and all of these homes had preblast surveys completed in association <br />with the Yoast Mine. <br />Blasting Signs, Warnings and Access Control <br />Blasting area signs and blasting warning signs will be placed along the perimeter of blasting <br />areas and permit boundaries, respectively, and at points of access that could reasonably be <br />expected to be used by the general public. Blasting area signs shall be periodically moved to <br />effectively delineate blasting areas. A description of the signs may be found in Tab 26. <br />Audible warning and all clear signals shall be given prior to and following a blast, respectively. <br />The warning signal consists of three short whistles from an air horn audible for one-half mile <br />from the point of the blast. The all clear signal consists of one long steady whistle from an air <br />horn audible for one-half mile from the point of the blast. Each person who regularly works or <br />resides in the permit area or within one-half mile of the permit boundary shall be notified <br />periodically of the meaning of the blasting warning signals by written instructions or other <br />appropriate means of communication. Warning and all clear signals are explained on the <br />blasting warning signs, the signs located at the entrance to the mining complex and on bulletin <br />boards in certain buildings which the general public may frequent. The signals are also <br />explained in the published blasting schedule and distributed as explained above. <br />Access to the blasting site shall be controlled by insuring that the blasting area is clear of all <br />livestock or unauthorized persons and guarding, blocking, or barricading roads leading into the <br />blasting area. The vicinity of charged holes will be barricaded, posted, or flagged against <br />unauthorized entry. A blast hole is not considered charged until an electric-type detonator is <br />introduced into the detonation system, or when connection to trunk lines is started. The all <br />clear signal shall be given only after the area has been checked to insure that no unusual <br />hazards such as slides or undetonated charges exist and access to or travel through the area <br />can safely resume. <br />l I <br />7 Revised 9/98 <br />