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<br />., <br />providing <br />, JG , <br />1 ::I L: ~n <br />cons~itinc <br />engineeiu <br />I"f EC Emironmrntal Colorac <br />9601 \1'est =l9th Avenue, Suii <br />\\'heaindge. CO 5003± <br />~~~, III IIIIIIIIIIIIIIII ~.~\5 ~ <br />/{,"J~ 99I9 <br />I ~ <br />Iti <br />IS <br />\ucmion: Ms. fvla~ine F. Stewart <br />~prtir <br />b~~ <br />y ~) <br />-rt,.a~s <br />~~II <br />~9 le <br />VJ l I.. ; 5 <br />r-e- ~ssw~d c~-'- <br />.~.Y~° errors <br />~ ~:~~ <br />RE: GOLD HILL ~7ILL -Gold Hill, CO <br />THIRD-QUARTER 1998 <br />COIbIPLIANCE SURFACE & GROUND WATER bIONITORING <br />Dear GIs. Stewart. <br />.90.; r. ,ink i <br />.t(~~i.:.i' ... <br />f ri. .t.i. •.. .• <br />November 10. 1995 <br />MFG Project 1-461 <br />- ~"=1VED <br /> <br />... ~I Iv;lrzras 8 Geology <br />This Izuer report documents the field activities conducted by McCulley. Fnck & Gilman. Ine. <br />t M FG [ in connecnon with the third-quarter groundwater monitoring at the Gold H ill ~1ill project site (Site i <br />near Guld Hill. Colorado. These monitoring activities are in fulfillment of requirements fur yu;rrtrrl+ <br />c~~mpliani r monitoring of groundwater and surface water at the Gold Hill Mill, as required by the Colorad~~ <br />Dnision of ~1inerals and Geoloey. Monitoring activuies were pertbrmed in accordance +vith \i PG <br />Standard Oper:uine Procedures (SOPS), adapted as necessary to accommodate as-encountered field <br />a>ndiuons. <br />I'1fIRD-QUARTER GROUNDWATER SA~IPLING <br />Groundwater sampling activmes were conduced a[ the Si[e by MFG personnel on Sepienthrr 3U. <br />I99S. Gruund+vatrr samples were collected from four monitoring wills (Well # I . V/zll q'. \Vell b ~. ;tnd <br />\1'rll ,Yd) Addnional groundwater samples were taken from the Hazel .4 adit and [he fresh water huldim_ <br />tank located inside the mill building. The fresh water holding tank is fed by groundwater pumped ftom the <br />\1-~ nona mine ;md therefore represents the Wynona groundwater sample. Respecuvz sampling locauun, <br />nie shown un Fteurz I. <br />Innial +vater levels for each well were measured [o the nearest 0.01 torn f«~m the top of the +ezll <br />rasing' (TOC) using a Solinst electronic water level meter, prior to commencing the sampling pruczdwr,. <br />The +vatzr level probe was decontaminated, at the beginning of the sampling even and pnur io sampling <br />each subsequent monnonng well, by washing [he probe with a niro-phosphate determent and distilled ++xa•i <br />.uluiion and rinsing twice +vith distilled water. \Vater level data obtained donne the third-yuanet u <br />presented in Table I. attached <br />After measuring the water level in each well, the respective wills were sampled by lowrtin_ a <br />~Irdicaied pohethylrnr bailer. suspended by nylon rope, into die will. Dur u~ ihr large casing iliamrtcrs <br />~i~pically 6 inchr.). the dzp[h of water in [he wells ttypically in excess of 30 fzen, and the slow rcch:uce <br />rate of the wells. the standard pracucz of purgine three casing volumes of water prior to sautplin_ ++a. <br /> <br />