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rnt�c µs5\KS ~ �0 Phone: (209) 524-3197 ` (209) 838-7347 MUNN & PERKINS A Division of George Reed, Inc. P.O. Box 4760 IEDD Modesto, California 95352 RECO�j MBAR 0 a 2007 27 February 2007 ENVIROPJ[u1LN T HERLlH PERPAIT�SERVICES Mr.Timothy O'Brien California Regional Water Quality Control Board Central Valley Region 11020 Sun Center Drive #200 Rancho Cordova, CA 95670-6114 RE. CRWQCB INCOMPLETE REPORT OF WASTE DISCHARGE LETTER DATED 5 DECEMBER 2006 MUNN$PERKINS AGGREGATE FACILITY, ESCALON,SAN JOAQUIN COUNTY Dear Mr. O'Brien, This correspondence is provided in response to the Notice of Incomplete Report of Waste Discharge received by the CRWQCB dated 5 December 2006. The following information has been prepared to correspond with the bulleted items presented in your letter: 0 Physical Address Where Legal Notice may be Served: Section E on Page 5 of Form 200 has been revised to reflect the physical address where notice may be served. A copy of the revised page is enclosed with this correspondence. [Please see "Attachment A"] 0 Schedule for excavation of On-site and Off-site Excavations: The schedule for the on-site excavation is estimated to take approximately 1-2 years. Imported sand and aggregate from off-site excavation sources will provide material to the processing facility to allow it to continue operating until approximately March 4, 2027. On March 4, 1999, The San Joaquin Planning Commission approved a Revisions of Approved Actions application to provide for the excavation and rehabilitation of the facility site for thirty (30) years from the date of approval. The revision calls for two (2) years of reclamation at the site, which will conclude by March 4, 2029. The settling pond /stormwater system is routinely monitored to assess capacity volume, and is located in an area that was previously excavated for aggregate materials. New pond construction progresses in a northerly direction as existing silt ponds fill up with sediment material. Pond containment perimeters are comprised of above-grade compacted earthen berms on three sides, while the prior pond's northern edge creates the remaining containment boundary. When a functioning silt pond has reached the end of its serviceable lifespan, process water is redirected to a new pond. The prior pond is then capped with topsoil, finish graded, inspected by the SMARA Lead Agency for reclamation compliance prior to the planting of nut trees, and subsequently planted and monitored for a two-year period to ensure successful rehabilitation has occurred. This procedure allows for continued reclamation of the area in accordance with the rehabilitation goals of the Conditional Use Permit. Sufficient acreage for future pond(s) construction is available on-site to accommodate processing plant activities through 2027.