Analytical data for waters of the Harvard Open Pit, Jamestown Mine, Tuolumne County, California, March 1998-September 1999
The Jamestown mine is located in the Jamestown mining district in western Tuolumne County, California (see Fig. 1). This district is one of many located on…
Public-domain full text preserved in the Mountain Man Mining Library. Original source: pubs.usgs.gov.
Table 4. QA/QC data for arsenic analyses done by Frontier Geosciences, Inc. SAMPLE SAMPLE/REFERENCE DATE DATE ANALYTE BATCH MATERIAL COLLECTED REPORTED Rep. Rep. Mean Spike added MS Conc Recovery (%) MS Conc Recovery (%) True/certified Observed Recovery (%) µg/L µg/L µg/L µg/L Rep.1*, µg/L Rep.2*, µg/L value, µg/L value, µg/L 98RA-HP 98RA-HP1-150 3/11/98 4/8/98 As(III) 98RA-HP1-150 3/11/98 4/8/98 As(total) QCS-1 (SRM) 4/8/98 As(total) 98RA1-HP 98RA1-HP1-150 6/1/98 6/20/98 As (III) 98RA1-HP3 6/1/98 6/20/98 As(TI) 98RA1-HP1-75 6/1/98 6/20/98 As (total) As(III) 2nd source (SRM) 6/20/98 As(III) As(V) (SRM) 6/20/98 As(TI) NIST 1643d (SRM) 6/20/98 As(total) 98RA2-HP 98RA2-HP1-0 10/22/98 10/31/98 As (III) 98RA2-HP3 10/22/98 10/31/98 As(TI) 98RA2-HP2 10/22/98 10/31/98 As (total) As(III) 2nd source (SRM) 10/31/98 As(III) As(V) (SRM) 10/31/98 As(TI) NIST 1643d (SRM) 10/31/98 As(total) 98KS-HP 98KS-HP6-0 10/28/98 11/18/98 As (III) 98KS1-HP 98KS2-HP4-0 10/28/98 11/18/98 As(TI) 98KS2-HP 98RA3-HP 98RA3-HP1-0 12/15/98 1/18/99 As (III) 98KS1-HP 98KS1-HP7-30 12/15/98 1/18/99 As(TI) 98KS3-HP NIST 1643d (SRM) 1/18/99 As(total) 99RA1-HP FA99RA1-HP1-150 2/28/99 3/29/99 As(TI) NIST 1643d (SRM) 3/29/99 As(total) 99RA2-HP FA99RA2-HP1-75 6/24/99 7/19/99 As (III) RA99RA2-HP1-150 6/24/99 7/19/99 As(TI) As(III) 2nd source (SRM) 7/19/99 As(III) NIST 1643d (SRM) 7/19/99 As(total) 99RA3-HP FA99RA3-HP1-0 9/22/99 10/22/99 As (III) RA99RA3-HP1-75 9/22/99 10/22/99 As(TI) NIST 1643d (SRM) 10/22/99 As(total) MATRIX DUPLICATES MATRIX SPIKE RECOVERY LABORATORY CONTROL STANDARD EXPLANATION OF TABLE ABBREVIATIONS Rep. Replicate determinations, each indicated (1st determination Rep. 1, 2nd determination Rep. 2) RPD Relative percent difference (unit is percent) MS Conc =Concentration observed for matrix-spiked sample (measures sum of original concentration and spike)