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Water-Quality Assessment of the Sacramento River
Basin, California: Water-Quality, Sediment and Tissue
Chemistry, and Biological Data, 1995-1998
(Open-File Report 2000-391)

Quality Control
Blank Data: Ground Water

Nutrients in filtered water (0.45 micrometer capsule filter)

Number of significant figures do not reflect analytical method
reporting levels.

Method reporting levels of all analytes

[mg/L - milligrams per liter, < - less than]

USGS Site Number State Well Number Date Time Type of Blank Ammonia (mg/L as N) Nitrite (NO2) (mg/L as N) Ammonia and Organic Nitrogen (mg/L as N) Nitrite (NO2) + Nitrate (NO3) (mg/L as N) Phosphorus (mg/L as P) Ortho Phosphorus (mg/L as P)
88888818   5/6/96 1535 Equipment Blank 0.03 <.010 <.20 0.05 0.01 <.010
381923121255001 6N/5E-33Q2M 5/23/96 1055 Field Blank <.015 <.010 <.20 <.050 <.010 <.010
390954121394302 15N/3E-8F2M 6/13/96 1045 Field Blank 0.05 0.01 <.20 0.08 0.03 0.01
385550121352201 13N/3E-36L4M 8/8/96 1115 Field Blank 0.02 <.010 <.20 0.08 <.010 <.010
88888818   7/28/97 1505 Equipment Blank <.015 <.010 <.20 <.050 <.010 <.010
390856122044301 15N/2W-16R1M 8/13/97 0935 Field Blank 0.04 <.010 <.20 <.050 <.010 <.010
392931122031701 19N/2W-23E1M 8/20/97 1705 Field Blank <.015 <.010 <.20 0.054 <.010 <.010
393235122055301 20N/2W-32J1M 9/18/97 1105 Field Blank <.015 <.010 <.20 <.050 <.010 <.010
385720121282401 13N/4E-24Q1M 10/2/97 1125 Field Blank <.015 <.010 <.20 <.050 <.010 0.01
88888818   6/5/98 1135 Equipment Blank 0.025 0.022 <.10 <.050 <.010 0.019
382911121312301 7N/4E-3K2M 6/22/98 1135 Field Blank 0.098 <.010 <.10 0.085 <.010 <.010
382800121270701 7N/5E-17B1M 7/22/98 1045 Field Blank 0.032 <.010 <.10 <.050 <.010 0.013
383727121301801 9N/4E-23A1M 8/6/98 0935 Field Blank 0.04 <.010 <.10 <.050 <.010 <.010
384318121230001 10N/5E-13F1 8/19/98 1015 Field Blank 0.025 <.010 <.10 <.050 <.010 0.016

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