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(. l• <br />~• <br />_~dmTet`l'S, 4': ~Gl1'.. +.".fi+3C7®oS:~S w::i:.f <br />JOHN G. KEPHART ~ CO. <br />G~~ND JUNCTION «~O~~TO~I~S <br />4'L. f•aRin AYON~ • rti qnC 3.•'.17019 • Cnwo Ju•KnoH, Caownno of ~Of <br />ANALyfMAl A~'OR'I <br />~~~ fpm Col arado Div. of Mi naval s & [3ov1 ogy <br />Dan Mathcwn <br />2148 Qroadway MC-5 <br />Grand Jct., CO 81503 <br />FA% 241-1516 <br />1401 wator <br />CrMOa•e* wo. _ a.+bsab.s IVd innlt• _----.. . . <br />~~~~~ $116/99 <br /> <br />8/31/99 <br />Sample 1401 <br />Sample YBiS49 01166~A, Grab ~amplc from <br />Minawater Pond at Roadside (Pond ^: - CDFS iF004)- <br />Samplo tnlacn at 1•~6 PM BJ13f99 <br />Original test results, rapvrtad 9/20199. <br />Totai Suap rndod Solids 164 mgll <br />l~ln al yead 9/20/99, EPA metf-.od 160.2 <br />F:cchcck rosultsr <br />Total Suspended Solids 126 mgll, using 50m1 sample <br />Total Sucpondod $olida 205 ag/l, using 30f7m1 sample <br />NOTES: <br />The sA~mple contains many particles that are near the pore size of the <br />filtcrr. Tha filtrate, as a result, is turbid. Also the amount of <br />filter loading eff a~cta the rweult. The grantor the sample amount <br />taken, tho greater tho measured suspended solids concentration. When <br />tieing a small amount of sample, mot9t of the material just under the <br />filtt•r pore wise passes right through. A larger sample provides <br />onough nntari al to partially clog the filter and then cause it to <br />cnpturo mare of tho undersize parti clan. The normal procedures uved <br />in "6tandard Methods for the Examination of Wat ar and Wastewater," <br />and the EPR Manual do nat specify that the filtrate should by free of <br />tur6idity• nor do they specify the sample siae to be used. This is <br />normally not a problem, but can c9uwe a highwr standard drvi~ki nn in <br />the cwow of aa~pivc having an abundance of particul atvs of a size <br />around one micron. The obtervvd differenevc may be attributably to <br />nmbiguiti e'j in the mothodol ogy that only appwar with amount of <br />pwrticulatce lboo than or equal to one micron in ciao. <br />Diractorf H. Dauer <br />. ..n .~.. • .L:' '. . • • ~ ~ <br />11111 .7~ INn V~'l:. <br />