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2022-07-18_PERMIT FILE - M2022018
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2022-07-18_PERMIT FILE - M2022018
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Last modified
1/16/2025 6:18:01 AM
Creation date
7/18/2022 12:53:26 PM
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Template:
DRMS Permit Index
Permit No
M2022018
IBM Index Class Name
Permit File
Doc Date
7/18/2022
Doc Name
Objection Acknowledgement/Response
From
Wasteline, Inc / South Hindsdale Sand & Gravel LLC
To
DRMS
Email Name
LJW
THM
Media Type
D
Archive
No
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South Hinsdale Response to Objections �e <br /> 12 July 2022 <br /> Although Exhibit C (Items 11-12 on Page 17) specifically does include washing of <br /> construction materials, we do not expect any washing will be done. Washing was included <br /> in case future customers need washed material, so that washing can be done without <br /> requiring a technical revision (although DWR, DRMS and County would of course be <br /> notified). However, we have not yet been told by any potential customer of that need. <br /> a. The excavated material, due to the terrain, soils and geology and anticipated seasons, <br /> is expected to be very moist and using water sprays to control dust is unlikely, even <br /> under current drought conditions. Screening and other methods of dust control for <br /> processing would be used. Because this may arguably be "ground water" we have, at <br /> DWR request, submitted the above-referenced Forms to DWR. Again, we do not <br /> expect to expose or impound actual ground water. <br /> b. Magnesium Chloride "Magwater" or lignin sulfate will be applied as needed for dust <br /> control on the access road and in/around the plant/work area. We will use water only <br /> if necessary to meet federal and state standards for dust. Note that both magnesium <br /> chloride and lignin sulfate ARE approved by EPA for use even in areas with potential <br /> discharge into waters of the US. <br /> c. Approximately 1.5 acres of irrigated land is located within the affected area and will be <br /> dried up during the mining operations until reclamation is done. Based on a normal <br /> irrigation rate of 48-60 inches per year, drying up 1.5 acres will provide 6 to 7.5 acre- <br /> feet per year. As identified in item 11 of Exhibit 5, annual water consumption is <br /> calculated to be less than 1 acre-foot. This is not legally required as the water in this <br /> basin is not under administration, but provides extra assurance of protecting both <br /> water quality and quantities in this operation. <br /> d. We are not aware of any reference to using impounded water for anything, including <br /> irrigation, in Items 11 and 12 or elsewhere in Exhibit C. The only time impoundment <br /> MIGHT be done would be tanks or basins for recirculating wash water — if washing <br /> were to be done. Stormwater basins are intended and designed to detain, not retain <br /> water, and meet state requirements for having no visible surface water contained <br /> within them for more than 72 hours. Water would exit those basins by infiltration, <br /> evaporation, or pumping onto other portions of the affected area. Outlets for discharge <br /> are good engineering practice to provide for emergency and exceptional storm events <br /> and designed to control water in case of spills or excessive erosion and generation of <br /> sediment, and to prevent damage. <br /> 1.7 Backfill. <br /> A volumetric estimate of 1210 CY of backfill is provided as part of the table of reclamation <br /> costs in item 5b of Exhibit D. If mining is done as planned, without unforeseen conditions, <br /> there will be no backfill required. The excavation of materials would taper off at the final <br /> planned slope of 3H:1V or (if necessary) 2H:1V). Any flattening of slopes would be done <br /> via pushing material from the top of the working face, and not from the bottom, but the <br /> plan, as followed, requires neither. The 1210 CY was calculated to provide some <br /> contingency funds in case of unexpected problems. <br /> 1.8 Seeding on 2:1 Slopes. <br /> We cannot firmly commit to the total area that might be necessary to slope at 2H:1 V rather <br /> than 3HAV. However, we expect this to be 1.0 acre or less of the 9.1 acres significantly <br /> affected. This is in conjunction with the construction of the new alignment of Kleckner <br /> Lane, assuming USFS approval. This estimate is based on engineering approximations <br /> 5182.22-003 WASTELINE, INC. Page 7 of 107 <br />
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