Sheet 3 of 4
BLASTING PERMIT
Performance Standards
(Please Read & Sign Each Paragraph)
The applicant must ensure that the blasting is conducted in accordance with regulations issued pursuant to M.R.S. A. Title 25,
Section 2441 and conform, at a minimum, to MDEP, Article 8-A, Performance Standards for Quarries dated July 4, 1996, 38 M.
R.S.A. §490-A(14).
The blasting plan submitted that work will be conducted in a manner which will cause no damage to surrounding properties.
The owner or operator shall use sufficient stemming, matting, or natural protective cover to prevent fly-rock from leaving
property owned or under control of the owner or operator or from entering protected natural resources or natural buffer
strips. Crushed rock or other suitable material may be used for stemming only if no other suitable material is available.
Blasting shall only be performed by fully qualified blasters experienced in blasting procedures and knowledgeable in all
applicable blasting regulations, and blasters shall submit any and all information requested by the City Engineer to satisfy
this requirement.
The maximum allowable air-blast at any building not owned or controlled by the developer may not exceed 129 decibels
peak when measured by an instrument having a flat response (+ or -3 decibels) over the range of 5 to 200 hertz.
The blaster shall comply with all local, state, and federal ordinances, laws, and regulation and conditions of the Blasting
Permit. Said notice shall specify the nature of the violation or failure to comply and steps taken by the blaster to correct said
violation or failure to comply.
If necessary to prevent damage, the City Engineer may specify lower maximum allowable air-blast levels than those in the
previous paragraph of this section for the use in the vicinity of a specific blasting operations.
If necessary to prevent damage, the City Engineer may specify lower maximum allowable air-blast levels than those in the
previous paragraph of this section for the use in the vicinity of a specific blasting operation.
Notification list of residences and abutters requesting notification of blasting 24 hours before blasting.
Pre-blast surveys shall be conducted in accordance with MDEP regulations outlined in the above-referenced Article 8-A,
dated July 4, 1996 and a copy provided to the City Engineer.
Pre-blast surveys must be offered to abutters and residences within 2640 foot radius for gravel pits and quarries and 500 foot
radius of general blasting.
Blasting activity shall only be conducted during daylight hours; provided, however, that it shall commence no earlier than
7:00 a.m. nor continue later than 7:00 p.m. on any given day, except that detonation of blasting explosives shall be
conducted only during daylight hours; provided, however, that it shall be no earlier than 8:00 a.m. nor later than 6:00 p.m..
Routine production blasting is not allowed on Sundays.
Blasting may not occur more frequently than four times per day.
Under no circumstances shall the City permit routine production blasting within one hundred fifty (150) feet of an adjoining
property line.
The maximum peak particle velocity at inhabitable structures not owned or controlled by the operator may not exceed the
levels established by MDEP Article 8-A, Performance Standards for Quarries, effective July 4, 1996, 38 M.R.S.A. §490-Z.14.K.
(Blasting), including Table 1 and the graph published by the U.S. Department of Interior in "Bureau of Mines Report of
Investigations 8507," Appendix B, Figure B-1. Either of the above referenced guidelines must be used to evaluate ground
vibration effects for the blasts for which a pre-blast survey is required and/or when blasting is to be monitored by seismic
instrumentation.