The Arizona Department of Environmental Quality (ADEQ) has extended the comment period on the proposed reissuance of the multi sector general permit (MSGP) for Stormwater Discharges associated with Industrial Activities. Comments on the proposed general permit must be submitted and received or postmarked no later than January 28, 2019. The new permits will replace the existing permits and permit holders might only have up to 3 months to obtain coverage under the new permit, once issued. The proposed general permit covers stormwater discharges from the 29 specified industrial sectors in Arizona, except for Indian Country.
The new draft permits can be found on the ADEQ website here, Industrial MSGP and Mining MSGP. In the new permit a new monitoring proposal would revise the action levels (or benchmarks). The proposal also establishes stringent response actions that are triggered by one exceedance of a proposed action level and include accelerated monitoring and completion and submittal of a new control measure assessment report form. A copy of the Public Notice can be found here and more information is available on ADEQ's website.