2008-02-25_REVISION - C1996083

• Permit No: C1996083
• IBM Index Class Name: REVISION
• Doc Date: 2/25/2008
• Doc Name: Response and Comments and Concerns
• From: J.E. Stover & Associates, Inc
• To: DRMS
• Type & Sequence: TR51
• Media Type: D
• Archive: No

AraZ Laboratories, Inc.
2773 Downhill Drive Steamboat Springs, CO 80487 [phone]
Bowie Resources, LLC ACZ Project ID: L67328

L67328-01 WG239663 Arsenic, extractable (AB-DTPA) M6010B ICP D1 Sample required dilution due to matrix.
M6010B ICP DB Sample required dilution due to low bias result.
M6010B ICP M2 Matrix spike recovery was low, the recovery of the
associated control sample (LCS or LFB) was acceptable.
M6010B ICP RA Relative Percent Difference (RPD) was not used for data
validation because the sample concentration is too low for
accurate evaluation (< 10x MDL).
WG239552 Boron (saturated paste) M6010B ICP RC For a solid matrix, the matrix duplicate precision
assessment (RPD or RER) exceeded the control limit,
which is attributable to the non-homogeneity of the sample.
WG239553 Cadmium, extractable (AB-DTPA) M6010B ICP RA Relative Percent Difference (RPD) was not used for data
validation because the sample concentration is too low for
accurate evaluation (< 1 Ox MDL).
Copper, extractable (AB-DTPA) M6010B ICP RA Relative Percent Difference (RPD) was not used for data
validation because the sample concentration is too low for
accurate evaluation (< 1 Ox MDL).
Lead, extractable (AB-DTPA) M6010B ICP M2 Matrix spike recovery was low, the recovery of the
associated control sample (LCS or LFB) was acceptable.
M6010B ICP RA Relative Percent Difference (RPD) was not used for data
validation because the sample concentration is too low for
accurate evaluation (< 10x MDL).
Manganese, extractable (AB-DTPA) M6010B ICP ZG The ICP Serial Dilution was not used for data validation
because the sample concentration was less than 50 times
the MDL.
WG239550 Molybdenum, extractable (NH4 Oxalate) M6010B ICP RA Relative Percent Difference (RPD) was not used for data
validation because the sample concentration is too low for
accurate evaluation (< 10x MDL).
WG239554 Selenium, soluble (Hot Water) SM3500-Se.C RA Relative Percent Difference (RPD) was not used for data
validation because the sample concentration is too low for
accurate evaluation (< 1 Ox MDL).
WG239553 Zinc, extractable (AB-DTPA) M6010B ICP B1 Target analyte detected in prep / method blank at or above
the method reporting limit. See Case Narrative.
M6010B ICP M2 Matrix spike recovery was low, the recovery of the
associated control sample (LCS or LFB) was acceptable.
M6010B ICP RA Relative Percent Difference (RPD) was not used for data
validation because the sample concentration is too low for
accurate evaluation (< 10x MDL).
M6010B ICP ZG The ICP Serial Dilution was not used for data validation
because the sample concentration was less than 50 times
the MDL.
WG239533 Organic Matter (Ignition @ 400) EPA 600/2-78-054 M3.2.14 RA Relative Percent Difference (RPD) was not used for data
validation because the sample concentration is too low for
accurate evaluation (< 1 Ox MDL).
WG239405 Sulfur Organic Residual M600/2-78-054 3.2.4 RA Relative Percent Difference (RPD) was not used for data
validation because the sample concentration is too low for
accurate evaluation (< 10x MDL).
Sulfur Pyritic Sulfide M600/2-78-054 3.2.4 RA Relative Percent Difference (RPD) was not used for data
validation because the sample concentration is too low for
accurate evaluation (< 10x MDL).
Sulfur Sulfate M600/2-78-054 3.2.4 RA Relative Percent Difference (RPD) was not used for data
validation because the sample concentration is too low for
accurate evaluation (< 10x MDL).
Sulfur Total M600/2-78-054 3.2.4 RA Relative Percent Difference (RPD) was not used for data
validation because the sample concentration is too low for
accurate evaluation (< 1 Ox MDL).
Total Sulfur minus Sulfate M600/2-78-054 3.2.4 RA Relative Percent Difference (RPD) was not used for data
validation because the sample concentration is too low for
accurate evaluation (< 1 Ox MDL).
REPAD.15.06.05.01
L67328: Page 12 of 17