Laserfiche WebLink
COLORADO LEGACY LAND <br /> 333 W.Hampden Ave.,Suite 935 Englewood, CO 80110 <br /> November 22,2022 VET <br /> REeel <br /> Colorado Department of Public Health and Environment <br /> Water Quality Control Division/WQCD-B2-CAS <br /> Compliance Assurance Section <br /> Attention:Jacob Dyste Of REC�MA ON <br /> 4300 Cherry Creek Drive South <br /> Denver,CO 80246-1530 <br /> Subject: September 2022 SW-AWD and SW-BPL Surface Monitoring Data for Sampling Stations, <br /> Schwartzwalder Mine,Paragraph 26,WQCD Order Number: I0100601-1,June1,2010, <br /> Schwartzwalder Mine,Golden,Colorado <br /> Dear Mr.Dyste: <br /> Pursuant to Paragraph 26 of the above referenced Order, please find enclosed data reports from contract <br /> laboratories as received by Ensero Solutions, Inc working on behalf of Colorado Legacy Land. These data <br /> originate from the analysis of the surface water samples collected in September 2022 at the Schwartzwalder <br /> Mine, monitoring station SW-BPL. Sample collection at monitoring station SW-AWD did not occur because <br /> Ralston Creek was dry. <br /> Review of the data indicates that the total and dissolved uranium concentrations at monitoring station SW-BPL, <br /> 35.7 µg/L and 35.8 µg/L,respectively,exceeded the 30 µg/L limit as set in the Surface Water Quality Standards <br /> (CDPHE,2018).Ralston Creek sampling location SW-AWD was dry indicating lower flows from the upper reaches <br /> of the creek.The uranium concentrations are the result of a lower flow that did not allow for the normal mixing <br /> of waters from the upper reaches of the creek before exiting the property before sampling location SW-BPL. <br /> Ensero will continue to monitor the surface water locations at the required frequency. <br /> If you have any questions,please don't hesitate to contact me. <br /> Sincerely, <br /> y — A. A��- - <br /> Jim Harrington,Managing Director <br /> COLORADO LEGACY LAND <br /> Jim 0 Colo rado Legacy.Lan d <br /> Distribution List: <br /> Dan Arnold,Denver Water,1 electronic copy via weblink, Daniel.Arnold ( DenverWater.org <br /> Jacob Dyste,CDPHE, 1 electronic copy via weblink, acob.Dvstenstate.co.us <br /> Amy Eschberger,DRMS, 1 electronic copy via weblink and 1 hard copy via FedEx, <br /> amy.eschbergerRstate.co.us <br /> Elizabeth Busby,Ensero Solutions, 1 electronic copy,ebusbyat ensem.com <br /> JoAnne Ary,Ensero Solutions, 1 electronic copy,jaryOc ensero.com <br /> Brad Wyant,City of Arvada, 1 electronic copy,bwyantOoarvada.org <br /> Evelyn Rhodes,City of Arvada,1 electronic copy,erhodesgarvada.org <br /> PAGE 1 OF 2 <br />