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Home My WebLink AboutDRC-2011-001456 - 0901a068801fb41eGeosyntec'^ consultants nn lil CM TRANSMCTAt2>^ 10S73 Ranctio Bemacdo i^oad Suite 200 San Diego, C:.A 42127 I'll 85H.674.6539 f .W 858.674,6586 wuvv."C(>s\iilcc.a)m TO: David Rupp, P.E. Director, Division of Radiation Control Utah Department of Environmental Quality Date: 1/27/11 Job No.: SC0349-05-03 195 North 1950 West, PO Box 144810 Salt Lake City, Utah 84114-4820 We are sending you • Enclosed r~l under separate cover via the foUowina items: • Original M Report • Letter • Drilling Log(s) la Copy r~l Documents O Sepias/Drawings • Test Results • Contracts • Specifications • Photos Copies Date Description 1 1/27/11 Response to Comments - Facility Cell 4B Final CQA Report, White Mesa Mill These are transmitted as cliecked below: l~l For Approval S For Your Use • For Your Infonnation • For Your Review O For Your Signature ^ As Requested • Approved as Submitted n Approved as Noted • Retumed for Corrections •Resubmit Copies For Approval Q Submit Copies for Distribution • Retum Corrected Prints REMARKS: Copy to: Harold Roberts, DMC Rusty Lundberg, UDEQ FROM: Gregory T. Corcoran Rebecca Flynn Regional Ofllces: Chicago, IL ! Columbia, MD Boca Raton, FL ! Atlanta, GA Austin, TX ! Guelph, Ontario, Canada Walnut Creek, CA IHuntington Beach, CA Laboratories Atlanta, GA Boca Raton, FL Huntington Beach, CA Geosyntec consultants 10875 Rancho Bernardo Road . Suite 200 San Diego, CA 921127 i PH 858.674.6559 FA.X-858.674.6586 vvvvw.geosyntec.coni 27 January 2011 David Rupp, P.E. Division of Radiation Control Utah Department of Environmental Quality 195 North 1950 West POBox 144850 Salt Lake City, Utah 84114-4850 Subject: Response to Division of Radiation Control Letter 25 January 2011 "Request for Information: January 21, 2011 Geosyntec Consultants Letter, DUSA Cell 4B Construction Quality Assurance [CQA] Report Addendum; January 20, 2011 DRC Letter, Review of Cell 4B Construction and Request for Information " White Mesa Mill - Cell 4B Blanding, Utah Dear Mr. Rupp. Geosyntec Consultants, Inc. (Geosyntec) has prepared this letter on behalf of Denison Mines (USA) Corp. (DMC) in response to the Utah Department of Environmental Quality. Division of Radiation Control's (DRC's) Review letter, dated 25 January 2011; Subject "January 21, 2011 Geosyntec Consultants Letter, DUSA Cell 4B Construction Quality Assurance [CQA] Report Addendum: January 20, 2011 DRC Letter, Review of Cell 4B Construction and Request for Information. " This letter serves as an addendum to the "Cell 4B Construction Quality Assurance Report, White Mesa Mill, Blanding, Utah" prepared by Geosyntec, dated November 2010. For ease of review, the DRC's comments are summarized below in italics with DMC's responses following each comment. The same corresponding comment number in the subject letter of 20 January 2011 is generally used. 3b. Regarding Strip Drains, the Method to Change the Direction (1). We stated that, "There are several locations shown on the original plans requiring the direction of the strip drains to change. Please demonstrate SC0349 RTC 20100126 dF engineers I scientists I innovators David Rupp, P.E. 27 January 2011 Page 2 SC0349 RTC 20100126 dF the method used with example photographs of such use [in place]” Although perhaps misunderstood, our intent was to request photos taken from on site of such use. Please complete this request. Photos of the strip drain bends are included as Photos 1 through 4 in Attachment 1. (2). We also stated that, “Numerous photographs of the strip drain lines in Appendix M of the CQA Report as well as some surveyed strip drain lines in Appendix K demonstrate strip drain lines locations where the strip slimes drains have been turned from their original course to “short-cut intersect” the slimes drain header perpendicularly. Please demonstrate the method used at these locations with example photographs of such use as well.” Geosyntec responded that, “…the strip composite was simply bent to form a curve.” For this no photos were provided. If simple bending to form a curve was used, please supply photos demonstrating such bending. Photos of the strip drain bends are included as Photos 1 through 4 in Attachment 1. 3c. Specific Strip Drains Nos. 31 and 51. We request the following: (1). “Photographs of reworked strip-drains 31 and 51, demonstrating no “piggy-backing” or “fallen dominoes” type stacking of those bags.” The subject Geosyntec response proposed photos no. 30 and 31 fulfilled this requirement. However, these photos are not definitive as the others supplied for strip drain documentation, due to the proximity of the photographs. Please complete this request. Photos of strip drains Nos. 31 and 51 are included as Photos 5 through 8 in Attachment 1. 5. New Item. Construction Drawing Sheet 7, Section E-4, 7. The non-woven cushion geotextile covering the slimes drain header is not shown in the section drawing. Please revised this section to show the extent and termination of the non-woven cushion geotextile above the slimes drain header, above the slimes drain sump piping, and up the embankment above the slimes drain sump access pipe. Attachment 1 Attachme ent 1 – Photo Log 1 P D D N D C d P D D D C d Photo 1 Date: 1/26/20 Direction: Northeast Description: Curvature of s drain No. 46 Photo 2 Date: 1/26/20 Direction: Nor Description: Curvature of s drain No. 46 010 strip 010 rth strip Attachme ent 1 – Photo Log 2 P D D N D C d P D D N D C d Photo 3 Date: 1/26/20 Direction: Northeast Description: Curvature of s drain No. 49 Photo 4 Date: 1/26/20 Direction: Northwest Description: Curvature of s drain No. 49 010 strip 010 strip Attachme ent 1 – Photo Log 3 P D D D S P D D N D S Photo 5 Date: 1/26/20 Direction: Nor Description: Strip-Drain No Photo 6 Date: 1/26/20 Direction: Nor Northwest Description: Strip-Drain No 01 rth o. 31 01 rth- o. 31 Attachme ent 1 – Photo Log 4 P D D N D S P D D N D S Photo 7 Date: 1/26/20 Direction: Northeast Description: Strip-Drain No Photo 8 Date: 1/26/20 Direction: Northeast Description: Strip-Drain No 01 o. 51 01 o. 51 Attachme ent 1 – Photo Log 5 Non Geo W Ge nwoven otextile Woven eotextile P D D N D T n g p a p P D D N D T n g w a Photo 9 Date: 11/7/20 Direction: Northwest Description: Termination o nonwoven geotextile in s prior to sand anchorage placement. Photo 10 Date: 11/7/20 Direction: Northwest Description: Termination o nonwoven geotextile in s with sand bag anchorage. 010 of sump bag 010 of sump g Attachment 2 10875 Rancho Bernardo Road Suite 200 San Diego, CA 92127 PH 858.674.6559 FAX 858.674.6586 www.geosyntec.com SC0349 RTC 20100126 dF 27 January 2011 David Rupp, P.E. Division of Radiation Control Utah Department of Environmental Quality 195 North 1950 West PO Box 144850 Salt Lake City, Utah 84114-4850 Subject: Response to Division of Radiation Control Letter 25 January 2011 “Request for Information: January 21, 2011 Geosyntec Consultants Letter, DUSA Cell 4B Construction Quality Assurance [CQA] Report Addendum; January 20, 2011 DRC Letter, Review of Cell 4B Construction and Request for Information” White Mesa Mill – Cell 4B Blanding, Utah Dear Mr. Rupp, Geosyntec Consultants, Inc. (Geosyntec) has prepared this letter on behalf of Denison Mines (USA) Corp. (DMC) in response to the Utah Department of Environmental Quality, Division of Radiation Control’s (DRC’s) Review letter, dated 25 January 2011; Subject “January 21, 2011 Geosyntec Consultants Letter, DUSA Cell 4B Construction Quality Assurance [CQA] Report Addendum; January 20, 2011 DRC Letter, Review of Cell 4B Construction and Request for Information.” This letter serves as an addendum to the “Cell 4B Construction Quality Assurance Report, White Mesa Mill, Blanding, Utah” prepared by Geosyntec, dated November 2010. For ease of review, the DRC’s comments are summarized below in italics with DMC’s responses following each comment. The same corresponding comment number in the subject letter of 20 January 2011 is generally used. 3b. Regarding Strip Drains, the Method to Change the Direction (1). We stated that, “There are several locations shown on the original plans requiring the direction of the strip drains to change. Please demonstrate David Rupp, P.E. 27 January 2011 Page 2 SC0349 RTC 20100126 dF the method used with example photographs of such use [in place]” Although perhaps misunderstood, our intent was to request photos taken from on site of such use. Please complete this request. Photos of the strip drain bends are included as Photos 1 through 4 in Attachment 1. (2). We also stated that, “Numerous photographs of the strip drain lines in Appendix M of the CQA Report as well as some surveyed strip drain lines in Appendix K demonstrate strip drain lines locations where the strip slimes drains have been turned from their original course to “short-cut intersect” the slimes drain header perpendicularly. Please demonstrate the method used at these locations with example photographs of such use as well.” Geosyntec responded that, “…the strip composite was simply bent to form a curve.” For this no photos were provided. If simple bending to form a curve was used, please supply photos demonstrating such bending. Photos of the strip drain bends are included as Photos 1 through 4 in Attachment 1. 3c. Specific Strip Drains Nos. 31 and 51. We request the following: (1). “Photographs of reworked strip-drains 31 and 51, demonstrating no “piggy-backing” or “fallen dominoes” type stacking of those bags.” The subject Geosyntec response proposed photos no. 30 and 31 fulfilled this requirement. However, these photos are not definitive as the others supplied for strip drain documentation, due to the proximity of the photographs. Please complete this request. Photos of strip drains Nos. 31 and 51 are included as Photos 5 through 8 in Attachment 1. 5. New Item. Construction Drawing Sheet 7, Section E-4, 7. The non-woven cushion geotextile covering the slimes drain header is not shown in the section drawing. Please revised this section to show the extent and termination of the non-woven cushion geotextile above the slimes drain header, above the slimes drain sump piping, and up the embankment above the slimes drain sump access pipe. Attachment 1 Attachme ent 1 – Photo Log 1 P D D N D C d P D D D C d Photo 1 Date: 1/26/20 Direction: Northeast Description: Curvature of s drain No. 46 Photo 2 Date: 1/26/20 Direction: Nor Description: Curvature of s drain No. 46 010 strip 010 rth strip Attachme ent 1 – Photo Log 2 P D D N D C d P D D N D C d Photo 3 Date: 1/26/20 Direction: Northeast Description: Curvature of s drain No. 49 Photo 4 Date: 1/26/20 Direction: Northwest Description: Curvature of s drain No. 49 010 strip 010 strip Attachme ent 1 – Photo Log 3 P D D D S P D D N D S Photo 5 Date: 1/26/20 Direction: Nor Description: Strip-Drain No Photo 6 Date: 1/26/20 Direction: Nor Northwest Description: Strip-Drain No 01 rth o. 31 01 rth- o. 31 Attachme ent 1 – Photo Log 4 P D D N D S P D D N D S Photo 7 Date: 1/26/20 Direction: Northeast Description: Strip-Drain No Photo 8 Date: 1/26/20 Direction: Northeast Description: Strip-Drain No 01 o. 51 01 o. 51 Attachme ent 1 – Photo Log 5 Non Geo W Ge nwoven otextile Woven eotextile P D D N D T n g p a p P D D N D T n g w a Photo 9 Date: 11/7/20 Direction: Northwest Description: Termination o nonwoven geotextile in s prior to sand anchorage placement. Photo 10 Date: 11/7/20 Direction: Northwest Description: Termination o nonwoven geotextile in s with sand bag anchorage. 010 of sump bag 010 of sump g Attachment 2