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<br />L
<br />1100 Simms Street
<br />Lakewood, Colorado
<br />Phone (3031 233 8155
<br />EARTH
<br />Mailing Address:
<br />AIR 1100 Simms Street
<br />Golden, Colorado 80401
<br />NATURAL RESOURCES LABORATORY, INC.
<br />METHODOLOGY FOOTNOTE"
<br />•
<br />~H pH ae measured in standard pH Unite on saturated Boil paste,
<br /> (ref: II.S.D.A. Handbook 60, method 21a, p. 102,)
<br />COND Electrical conductivity (epacifio ooaducasnce) in micromhos
<br /> per centimeter (y:mho%m) oorreoted to 25 C, ae measured on
<br /> saturation eztract solution. (ref: II.S,D.A, Handbook 60,
<br /> methods 3a and 1{b, pp, 8!•-90.)
<br />C1 Soluble chloride in milligrams per liter (mg/1 Cl) as
<br /> measured on saturation eztraotion solution, measurement by
<br /> silver nitrate titration. (ref: eztraotion, II.S,D,A, 60,
<br /> ibid; measurement, Homer, Methods of Analysis for Soils,
<br /> Plante, and Waters, 1961, p. 100,)
<br />F Soluble fluoride in milligrams per liter (mg/1 F) as measured
<br /> on saturation eztraction solution, measurement by speoifio
<br /> ion electrode. (ref: eztraotian, II,S,D.A. 60, ibid;
<br /> measurement Standard Methods, ].l:th Ed„ 1976, Method 1•]1~B,
<br /> PP• 391-92.j
<br />50~, Soluble sulfate in milligrams per liter (mg/1 SO ) ae
<br />measured on saturation eztraotion solution, grav~trio
<br />measurement as BaSO (ref: eztraation, II,S,D,A, 60, ibid;
<br />measurement, Standa~ Methods, ]lath Ed,,.1976, Method 4748, pp. 495-96,)
<br />Pa Ca ~ Na Soluble barium, calcium,magnesium, and sodium in milligrams
<br />per liter (mg~l Ba, Ca, Mg, Na) as measured on saturation eztractioa
<br />solution, measurement by atomio absorption npeotrophotometry.
<br />(ref: eztraction, II.S.D.A, 60 ibid; measurement, Perkin-
<br />Elmer Corp, instrument menu alsj
<br />SAR Sodium s~eorption ratio ae calculated from soluble Ca, Mg,
<br />and Na ezgreeeed in maq/1. (ref: see Ca, Mg, Na reference
<br />above; II.S,D.A, Handbook 60, p, 26 oaloulation.)
<br />•
<br />N03 Nitrate-nitrogen ae milligrams per kilogram ni.trogea (mg~kg N),
<br />(ref: A.S.A. Mono. No. 9, Part 2, method Bla-5,3, pp, 1216-1219,
<br />Method modified per eectioa 84-5.3,1; oommente.)
<br />ANALYT;CAL SERVICES AND RESEARCH
<br />-41-
<br />WATER
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