##### QADATA Summary -- October 2008

The Inorganic Blind Sample Project (IBSP) of the Branch of Quality
Systems reviews about 90 inorganic analytical lines at the National
Water Quality Laboratory (NWQL) using double-blind, quality-control
samples. A summary of this review, the QADATA Summary, is a short report
commenting on only those analytical lines for which the quality-control
charts indicate or have indicated a bias and/or higher than expected
variability. Overall, the vast majority of the inorganic methods at the
NWQL demonstrate acceptable variability and little or no bias.

The data reviewed in this summary is for the time period 03/01/08
through 10/02/08; however, longer-range charts may be used when they add
clarity to the problem. The attached quality-control charts contain data
from samples that have been subject to the same laboratory handling
procedures as the samples submitted by the USGS Water Science Centers
(WSC), and the data have the same level of quality-control review as the
data released to the WSCs. Therefore, any factors that affect the data
displayed on the IBSP quality-control charts should also affect the
WSCs' data in a similar manner. Data from samples known to have been
affected by a problem independent of the NWQL are removed from the
charts.

In this report, the "Problem" is determined and written by the IBSP and
then sent to the NWQL. The NWQL then gets two weeks to respond to the
issue by writing an "NWQL Comment" and a "Corrective Action." Comments
from the NWQL are incorporated into the QADATA Summary as received. The
most recent comments and responses are in bold followed by comments and
responses from previous QADATA Summaries. Approximately one month after
the QADATA Summary is distributed, the NWQL and IBSP personnel usually
meet to follow-up on corrective actions and on how the corrective
actions are affecting subsequent data.

Current charts (updated twice weekly) may be accessed at
<http://bqs.usgs.gov/bsp/Controlcharts.htm>. Laboratory and WSC
personnel may have their own custom quality-assurance data retrieval to
parallel their objectives by contacting Ted Struzeski (303.236.1872,
<struzesk@usgs.gov>). Charts pertaining specifically to this report can
be accessed electronically by following the underlined hyperlinks
embedded within the report and associated with each analysis discussed.

Historical QADATA Summaries may be accessed at
<http://bqs.usgs.gov/bsp/QAData.htm>.

*Tedmund M. Struzeski*

<struzesk@usgs.gov>

Table of Contents

Report Highlights Page

[One-Page Summary](#Highlights) 3

Detailed Description by Analyte

Trace Metals

[Iron, Filtered,](#nwql0645) ICP, Labcode 0645, Parmcode 01046PLA11 4

[Manganese, Filtered,](#nwql0648) ICP, Labcode 0648, Parmcode 01056PLA11
5

[Nickel, Unfiltered,](#nwql3131) cICP-MS, Labcode 3131, Parmcode
01067PLM11 5

[Strontium, Filtered,](#nwql0652) ICP, Labcode 0652, Parmcode 01080PLA11
5

[Strontium, Unfiltered,](#nwql2387) ICP-MS, Labcode 2387, Parmcode
01082PLM48 6

[Uranium, Unfiltered,](#nwql2389) ICP-MS, Labcode 2389, Parmcode
28011PLM48 6

[Vanadium, Unfiltered,](#nwql3134) cICP-MS, Labcode 3135, Parmcode
01087PLM11 7

[Zinc, Filtered,](#nwql3138) cICP-MS, Labcode 3138, Parmcode 01090PLM10
8

Physical Properties

[Residue on Evaporation \@105°, Unfiltered,](#nwql0165) Gravimetry,
Labcode 0165, Parmcode 00500ROE12 10

> []{#Highlights .anchor}**Report Highlights**

######### Note: Click the underlined text to access the control chart associated with the comment.

1.  [Iron,](http://bqs.usgs.gov/bsp/QADATA_all/08Oct/Oct08NWQL01046PLA11.gif)
    filtered, ICP, parmcode 1046PLA11-- Sharp downward trend and
    increased variability starting late February 2008.

2.  [Nickel,](http://bqs.usgs.gov/bsp/QADATA_all/08Oct/Oct08BBP_NiU_01067PLM11.xls)
    unfiltered, cICP-MS, parmcode 01067PLM11 -- The LTMDL has been
    increased. This will help reduce the frequency of future false
    positives.

3.  [Residue on Evaporation
    \@105°,](http://bqs.usgs.gov/bsp/QADATA_all/08Oct/Oct08NWQL00500ROE12.gif)
    unfiltered, gravimetry, parmcode 00500ROE12 -- Slight positive bias
    (5.2%) starting March 2008.

4.  [Strontium,](http://bqs.usgs.gov/bsp/QADATA_all/08Oct/Oct08NWQL01080PLA11.gif)
    filtered, ICP, parmcode 01080PLA11 -- Slight positive bias (6.3%)
    starting July 2008.

5.  [Strontium,](http://bqs.usgs.gov/bsp/QADATA_all/08Oct/Oct08BBP_SrU_01082PLM48.xls)
    unfiltered, ICP-MS, parmcode 01082PLM48 -- The LTMDL has been
    increased. This should eliminate most future false positives.

6.  [Uranium,](http://bqs.usgs.gov/bsp/QADATA_all/08Oct/Oct08NWQL28011PLM48.gif)
    unfiltered, ICP-MS, parmcode 28011PLM48 -- Slight positive bias
    (5.8%) starting late June 2008.

7.  [Vanadium,](http://bqs.usgs.gov/bsp/QADATA_all/08Oct/Oct08BBP_VU_01087PLM11.xls)
    unfiltered, cICP-MS, parmcode 01087PLM11 -- The IRL has been changed
    to an LTMDL and increased. This will help reduce the frequency of
    future false positives.

8.  [Zinc,](http://bqs.usgs.gov/bsp/QADATA_all/08Oct/Oct08NWQL01090PLM10.gif)
    filtered, cICP-MS, parmcode 01090PLM10 -- Long-term positive bias
    showing improvement, but is still present (currently at 9%).
    Variability has increased as of August 2008.

NWQL PERFORMANCE ON IBSP SAMPLES

######### **Note: Click the underlined text in the left-hand column to access the control chart for the associated comment.**

+---------+---+------------------+-------------------+-------------------+
| **Trace | * |                  | **NWQL Comment**  | **Corrective      |
| Metal   | * |                  |                   | Action**          |
| De      | P |                  |                   |                   |
| termina | r |                  |                   |                   |
| tions** | o |                  |                   |                   |
|         | b |                  |                   |                   |
|         | l |                  |                   |                   |
|         | e |                  |                   |                   |
|         | m |                  |                   |                   |
|         | * |                  |                   |                   |
|         | * |                  |                   |                   |
+=========+===+==================+===================+===================+
| [[]{#n  | * |                  | **On-line QC      | **The NWQL will   |
| wql0645 | * |                  | charts show       | work with BQS to  |
| .       | R |                  | little            | evaluate NWQL TPC |
| anchor} | e |                  | variability or    | samples, blank    |
| **Iron, | s |                  | bias in either of | water, and BQS    |
| Filtere | u |                  | the third party   | check samples to  |
| d**](ht | l |                  | check samples     | determine why     |
| tp://bq | t |                  | (TPC) or blanks.  | there is a        |
| s.usgs. | s |                  | The TPC charts    | discrepancy       |
| gov/bsp | r |                  | have points above | between the NWQL  |
| /QADATA | e |                  | and below the     | and BQS charts.   |
| _all/08 | c |                  | most probable     | An initial        |
| Oct/Oct | e |                  | value, but more   | meeting is        |
| 08NWQL0 | i |                  | points above the  | scheduled for the |
| 1046PLA | v |                  | MPV. Tests of     | week of October   |
| 11.gif) | e |                  | blank water did   | 20, 2008.**       |
| **ICP   | d |                  | not indicate a    |                   |
| labcode | s |                  | problem or        |                   |
| 0645    | i |                  | possible          |                   |
| p       | n |                  | solution.**       |                   |
| armcode | c |                  |                   |                   |
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+---------+---+------------------+-------------------+-------------------+
| *P      |   |                  |                   |                   |
| revious |   |                  |                   |                   |
| c       |   |                  |                   |                   |
| omments |   |                  |                   |                   |
| for     |   |                  |                   |                   |
| iron,   |   |                  |                   |                   |
| fi      |   |                  |                   |                   |
| ltered, |   |                  |                   |                   |
| labcode |   |                  |                   |                   |
| 0645,   |   |                  |                   |                   |
| p       |   |                  |                   |                   |
| armcode |   |                  |                   |                   |
| 0104    |   |                  |                   |                   |
| 6PLA11* |   |                  |                   |                   |
+---------+---+------------------+-------------------+-------------------+
| From    | T |                  | Dilutions on our  | NWQL will use     |
|         | h |                  | third-party check | blank water from  |
| QADATA  | e |                  | showed no bias,   | different sources |
| Summary | r |                  | but there had     | and use this      |
| August  | e |                  | been maintenance  | water to make new |
| 2008    | s |                  | performed on the  | calibration       |
|         | u |                  | instrument prior  | standards. We     |
|         | l |                  | to the test. New  | will also test    |
|         | t |                  | calibrants have   | the source of     |
|         | s |                  | also been made.   | current blank     |
|         | c |                  | These actions     | water by a        |
|         | o |                  | have brought iron | different         |
|         | n |                  | back within the   | technology        |
|         | t |                  | acceptance range, | (method).         |
|         | i |                  | but blind results |                   |
|         | n |                  | are still showing |                   |
|         | u |                  | a low bias on BQS |                   |
|         | e |                  | charts and no     |                   |
|         | t |                  | bias on internal  |                   |
|         | o |                  | charts. Internal  |                   |
|         | d |                  | charts and BQS    |                   |
|         | e |                  | charts are based  |                   |
|         | m |                  | on samples at     |                   |
|         | o |                  | different         |                   |
|         | n |                  | concentrations    |                   |
|         | s |                  | (500 ug/L for the |                   |
|         | t |                  | internal charts   |                   |
|         | r |                  | versus 38 -- 208  |                   |
|         | a |                  | ug/L for the BQS  |                   |
|         | t |                  | charts) and this  |                   |
|         | e |                  | may indicate a    |                   |
|         | a |                  | bias at the lower |                   |
|         | n |                  | concentrations.   |                   |
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+---------+---+------------------+-------------------+-------------------+
| From    | R |                  | On-line charts do | We will dilute    |
|         | e |                  | not show this     | one of our        |
| QADATA  | s |                  | trend, but the    | third-party-check |
| Summary | u |                  | references used   | samples to match  |
| June    | l |                  | are at higher     | the               |
| 2008    | t |                  | concentrations    | concentrations    |
|         | s |                  | than those used   | commonly found in |
|         | r |                  | by BQS.           | the BQS check     |
|         | e |                  |                   | samples and       |
|         | c |                  |                   | perform multiple  |
|         | e |                  |                   | analyses for      |
|         | i |                  |                   | comparison. We    |
|         | v |                  |                   | will also check   |
|         | e |                  |                   | our calibration   |
|         | d |                  |                   | standards by a    |
|         | s |                  |                   | different         |
|         | i |                  |                   | analytical        |
|         | n |                  |                   | method. Outcomes  |
|         | c |                  |                   | of these tests    |
|         | e |                  |                   | will determine    |
|         | t |                  |                   | our next steps.   |
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|         | ( |                  |                   |                   |
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|         | t |                  |                   |                   |
|         | t |                  |                   |                   |
|         | p |                  |                   |                   |
|         | : |                  |                   |                   |
|         | / |                  |                   |                   |
|         | / |                  |                   |                   |
|         | b |                  |                   |                   |
|         | q |                  |                   |                   |
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|         | . |                  |                   |                   |
|         | u |                  |                   |                   |
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|         | g |                  |                   |                   |
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|         | . |                  |                   |                   |
|         | g |                  |                   |                   |
|         | o |                  |                   |                   |
|         | v |                  |                   |                   |
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|         | D |                  |                   |                   |
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|         | T |                  |                   |                   |
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|         | _ |                  |                   |                   |
|         | a |                  |                   |                   |
|         | l |                  |                   |                   |
|         | l |                  |                   |                   |
|         | / |                  |                   |                   |
|         | 0 |                  |                   |                   |
|         | 8 |                  |                   |                   |
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|         | 0 |                  |                   |                   |
|         | 8 |                  |                   |                   |
|         | N |                  |                   |                   |
|         | W |                  |                   |                   |
|         | Q |                  |                   |                   |
|         | L |                  |                   |                   |
|         | 0 |                  |                   |                   |
|         | 1 |                  |                   |                   |
|         | 0 |                  |                   |                   |
|         | 4 |                  |                   |                   |
|         | 5 |                  |                   |                   |
|         | P |                  |                   |                   |
|         | L |                  |                   |                   |
|         | A |                  |                   |                   |
|         | 1 |                  |                   |                   |
|         | 5 |                  |                   |                   |
|         | . |                  |                   |                   |
|         | g |                  |                   |                   |
|         | i |                  |                   |                   |
|         | f |                  |                   |                   |
|         | ) |                  |                   |                   |
|         | [ |                  |                   |                   |
|         | ) |                  |                   |                   |
|         | ] |                  |                   |                   |
|         | { |                  |                   |                   |
|         | . |                  |                   |                   |
|         | u |                  |                   |                   |
|         | n |                  |                   |                   |
|         | d |                  |                   |                   |
|         | e |                  |                   |                   |
|         | r |                  |                   |                   |
|         | l |                  |                   |                   |
|         | i |                  |                   |                   |
|         | n |                  |                   |                   |
|         | e |                  |                   |                   |
|         | } |                  |                   |                   |
|         | . |                  |                   |                   |
+---------+---+------------------+-------------------+-------------------+
|         |   |                  |                   |                   |
+---------+---+------------------+-------------------+-------------------+
| [[]{#n  | * |                  |                   | **NWQL will       |
| wql0648 | * |                  |                   | continue to       |
| .ancho  | D |                  |                   | monitor this      |
| r}**Man | a |                  |                   | analysis.**       |
| ganese, | t |                  |                   |                   |
| Filtere | a |                  |                   |                   |
| d**](ht | f |                  |                   |                   |
| tp://bq | r |                  |                   |                   |
| s.usgs. | o |                  |                   |                   |
| gov/bsp | m |                  |                   |                   |
| /QADATA | s |                  |                   |                   |
| _all/08 | a |                  |                   |                   |
| Oct/Oct | m |                  |                   |                   |
| 08NWQL0 | p |                  |                   |                   |
| 1056PLA | l |                  |                   |                   |
| 11.gif) | e |                  |                   |                   |
| **ICP   | s |                  |                   |                   |
| labcode | a |                  |                   |                   |
| 0648    | n |                  |                   |                   |
| p       | a |                  |                   |                   |
| armcode | l |                  |                   |                   |
| 01056   | y |                  |                   |                   |
| PLA11** | z |                  |                   |                   |
|         | e |                  |                   |                   |
|         | d |                  |                   |                   |
|         | s |                  |                   |                   |
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|         | * |                  |                   |                   |
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|         | A |                  |                   |                   |
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|         | h |                  |                   |                   |
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|         | l |                  |                   |                   |
|         | d |                  |                   |                   |
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|         | c |                  |                   |                   |
|         | l |                  |                   |                   |
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|         | l |                  |                   |                   |
|         | y |                  |                   |                   |
|         | m |                  |                   |                   |
|         | o |                  |                   |                   |
|         | n |                  |                   |                   |
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|         | h |                  |                   |                   |
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|         | n |                  |                   |                   |
|         | e |                  |                   |                   |
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|         | t |                  |                   |                   |
|         | Q |                  |                   |                   |
|         | A |                  |                   |                   |
|         | D |                  |                   |                   |
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|         | T |                  |                   |                   |
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|         | m |                  |                   |                   |
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|         | a |                  |                   |                   |
|         | r |                  |                   |                   |
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|         | i |                  |                   |                   |
|         | s |                  |                   |                   |
|         | d |                  |                   |                   |
|         | i |                  |                   |                   |
|         | s |                  |                   |                   |
|         | t |                  |                   |                   |
|         | r |                  |                   |                   |
|         | i |                  |                   |                   |
|         | b |                  |                   |                   |
|         | u |                  |                   |                   |
|         | t |                  |                   |                   |
|         | e |                  |                   |                   |
|         | d |                  |                   |                   |
|         | . |                  |                   |                   |
|         | * |                  |                   |                   |
|         | * |                  |                   |                   |
+---------+---+------------------+-------------------+-------------------+
| *P      |   |                  |                   |                   |
| revious |   |                  |                   |                   |
| c       |   |                  |                   |                   |
| omments |   |                  |                   |                   |
| for     |   |                  |                   |                   |
| man     |   |                  |                   |                   |
| ganese, |   |                  |                   |                   |
| fi      |   |                  |                   |                   |
| ltered, |   |                  |                   |                   |
| labcode |   |                  |                   |                   |
| 0648,   |   |                  |                   |                   |
| p       |   |                  |                   |                   |
| armcode |   |                  |                   |                   |
| 0105    |   |                  |                   |                   |
| 6PLA11* |   |                  |                   |                   |
+---------+---+------------------+-------------------+-------------------+
| From    | A |                  | Internal charts   | NWQL will use     |
|         | s |                  | show no bias, but | blank water from  |
| QADATA  | l |                  | BQS samples are   | different sources |
| Summary | i |                  | at a much lower   | and use this      |
| August  | g |                  | concentration     | water to make new |
| 2008    | h |                  | (250 ug/L for the | calibration       |
|         | t |                  | internal charts   | standards. We     |
|         | n |                  | vs 8 - 38 ug/L    | will also test    |
|         | e |                  | for the BQS       | the source of     |
|         | g |                  | charts). This may | current blank     |
|         | a |                  | indicate a bias   | water by a        |
|         | t |                  | at the lower      | different         |
|         | i |                  | concentrations.   | technology        |
|         | v |                  |                   | (method).         |
|         | e |                  |                   |                   |
|         | b |                  |                   |                   |
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|         | d |                  |                   |                   |
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|         | 2 |                  |                   |                   |
|         | 0 |                  |                   |                   |
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|         | 8 |                  |                   |                   |
|         | . |                  |                   |                   |
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|         | . |                  |                   |                   |
+---------+---+------------------+-------------------+-------------------+
|         |   |                  |                   |                   |
+---------+---+------------------+-------------------+-------------------+
| [[]{#n  | * |                  |                   | **NWQL will       |
| wql3131 | * |                  |                   | continue to       |
| .an     | T |                  |                   | monitor this      |
| chor}** | h |                  |                   | analysis.**       |
| Nickel, | e |                  |                   |                   |
| Unfilt  | L |                  |                   |                   |
| ered**] | T |                  |                   |                   |
| (http:/ | M |                  |                   |                   |
| /bqs.us | D |                  |                   |                   |
| gs.gov/ | L |                  |                   |                   |
| bsp/QAD | f |                  |                   |                   |
| ATA_all | o |                  |                   |                   |
| /08Oct/ | r |                  |                   |                   |
| Oct08BB | t |                  |                   |                   |
| P_NiU_0 | h |                  |                   |                   |
| 1067PLM | i |                  |                   |                   |
| 11.xls) | s |                  |                   |                   |
| **      | l |                  |                   |                   |
| cICP-MS | i |                  |                   |                   |
| labcode | n |                  |                   |                   |
| 3131    | e |                  |                   |                   |
| p       | h |                  |                   |                   |
| armcode | a |                  |                   |                   |
| 01067   | s |                  |                   |                   |
| PLM11** | b |                  |                   |                   |
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|         | p |                  |                   |                   |
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|         | l |                  |                   |                   |
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|         | b |                  |                   |                   |
|         | i |                  |                   |                   |
|         | a |                  |                   |                   |
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|         | a |                  |                   |                   |
|         | n |                  |                   |                   |
|         | d |                  |                   |                   |
|         | v |                  |                   |                   |
|         | a |                  |                   |                   |
|         | r |                  |                   |                   |
|         | i |                  |                   |                   |
|         | a |                  |                   |                   |
|         | b |                  |                   |                   |
|         | i |                  |                   |                   |
|         | l |                  |                   |                   |
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|         | t |                  |                   |                   |
|         | y |                  |                   |                   |
|         | . |                  |                   |                   |
|         | * |                  |                   |                   |
|         | * |                  |                   |                   |
+---------+---+------------------+-------------------+-------------------+
| *P      |   |                  |                   |                   |
| revious |   |                  |                   |                   |
| c       |   |                  |                   |                   |
| omments |   |                  |                   |                   |
| for     |   |                  |                   |                   |
| nickel, |   |                  |                   |                   |
| unfi    |   |                  |                   |                   |
| ltered, |   |                  |                   |                   |
| labcode |   |                  |                   |                   |
| 3131,   |   |                  |                   |                   |
| p       |   |                  |                   |                   |
| armcode |   |                  |                   |                   |
| 0106    |   |                  |                   |                   |
| 7PLM11* |   |                  |                   |                   |
+---------+---+------------------+-------------------+-------------------+
| From    | S |                  | We performed      | NWQL will         |
|         | i |                  | maintenance on    | continue to       |
| QADATA  | n |                  | the instrument    | monitor this      |
| Summary | c |                  | that initially    | analysis.         |
| August  | e |                  | appears to have   |                   |
| 2008    | A |                  | improved this     |                   |
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+---------+---+------------------+-------------------+-------------------+
|         |   |                  |                   |                   |
+---------+---+------------------+-------------------+-------------------+
| [[]{#n  | * |                  | **NWQL analysts   | **NWQL will       |
| wql0652 | * |                  | noticed the same  | continue to       |
| .ancho  | A |                  | bias and made new | collect more data |
| r}**Str | p |                  | calibration       | for this analysis |
| ontium, | o |                  | standards on Oct. | and evaluate the  |
| Filtere | s |                  | 1, 2008. On-line  | corrective        |
| d**](ht | i |                  | charts indicate   | action.**         |
| tp://bq | t |                  | the bias has      |                   |
| s.usgs. | i |                  | improved.**       |                   |
| gov/bsp | v |                  |                   |                   |
| /QADATA | e |                  |                   |                   |
| _all/08 | b |                  |                   |                   |
| Oct/Oct | i |                  |                   |                   |
| 08NWQL0 | a |                  |                   |                   |
| 1080PLA | s |                  |                   |                   |
| 11.gif) | h |                  |                   |                   |
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+---------+---+------------------+-------------------+-------------------+
|         |   |                  |                   |                   |
+---------+---+------------------+-------------------+-------------------+
| [[]{#n  | * |                  |                   | **NWQL will       |
| wql2387 | * |                  |                   | continue to       |
| .ancho  | T |                  |                   | monitor this      |
| r}**Str | h |                  |                   | analysis.**       |
| ontium, | e |                  |                   |                   |
| Unfilt  | L |                  |                   |                   |
| ered**] | T |                  |                   |                   |
| (http:/ | M |                  |                   |                   |
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| bsp/QAD | f |                  |                   |                   |
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+---------+---+------------------+-------------------+-------------------+
| *P      |   |                  |                   |                   |
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| c       |   |                  |                   |                   |
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| 2PLM48* |   |                  |                   |                   |
+---------+---+------------------+-------------------+-------------------+
| From    | S |                  | We performed      | NWQL will         |
|         | i |                  | maintenance on    | continue to       |
| QADATA  | n |                  | the instrument    | monitor this      |
| Summary | c |                  | that initially    | analysis.         |
| August  | e |                  | appears to have   |                   |
| 2008    | M |                  | improved this     |                   |
|         | a |                  | analysis.         |                   |
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+---------+---+------------------+-------------------+-------------------+
|         |   |                  |                   |                   |
+---------+---+------------------+-------------------+-------------------+
| [[]{#n  | * |                  | **On-line QC      | **The NWQL will   |
| wql2389 | * |                  | charts show no or | check calibration |
| .anc    | A |                  | slight bias in    | standards, blank  |
| hor}**U | p |                  | either of the     | water, and TPC    |
| ranium, | o |                  | third party check | samples to        |
| Un      | s |                  | samples (TPC) or  | determine if      |
| filtere | i |                  | blanks. The TPC   | there are method  |
| d**](ht | t |                  | charts have       | problems.**       |
| tp://bq | i |                  | points above and  |                   |
| s.usgs. | v |                  | below the most    | **The NWQL will   |
| gov/bsp | e |                  | probable value,   | work with BQS to  |
| /QADATA | b |                  | but more points   | evaluate NWQL TPC |
| _all/08 | i |                  | above the most    | samples, blank    |
| Oct/Oct | a |                  | probable value    | water, and BQS    |
| 08NWQL2 | s |                  | (MPV).**          | check samples to  |
| 8011PLM | h |                  |                   | determine why     |
| 48.gif) | a |                  |                   | there is a        |
| *       | s |                  |                   | discrepancy       |
| *ICP-MS | d |                  |                   | between the NWQL  |
| labcode | e |                  |                   | and BQS charts.   |
| 2389    | v |                  |                   | An initial        |
| p       | e |                  |                   | meeting is        |
| armcode | l |                  |                   | scheduled for the |
| 28011   | o |                  |                   | week of October   |
| PLM48** | p |                  |                   | 20, 2008.**       |
|         | e |                  |                   |                   |
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|         | * |                  |                   |                   |
|         | * |                  |                   |                   |
+---------+---+------------------+-------------------+-------------------+
|         |   |                  |                   |                   |
+---------+---+------------------+-------------------+-------------------+
| [[]{#n  | * |                  | []{.mark}         | **NWQL will       |
| wql3134 | * |                  |                   | continue to       |
| .anch   | T |                  |                   | monitor this      |
| or}**Va | h |                  |                   | analysis.**       |
| nadium, | e |                  |                   |                   |
| Unfil   | I |                  |                   |                   |
| tered** | R |                  |                   |                   |
| ](http: | L |                  |                   |                   |
| //bqs.u | o |                  |                   |                   |
| sgs.gov | f |                  |                   |                   |
| /bsp/QA | 0 |                  |                   |                   |
| DATA_al | . |                  |                   |                   |
| l/08Oct | 1 |                  |                   |                   |
| /Oct08B | u |                  |                   |                   |
| BP_VU_0 | g |                  |                   |                   |
| 1087PLM | / |                  |                   |                   |
| 11.xls) | L |                  |                   |                   |
| **      | h |                  |                   |                   |
| cICP-MS | a |                  |                   |                   |
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| 3135    | b |                  |                   |                   |
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| 01087   | n |                  |                   |                   |
| PLM11** | u |                  |                   |                   |
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+---------+---+------------------+-------------------+-------------------+
| *P      |   |                  |                   |                   |
| revious |   |                  |                   |                   |
| c       |   |                  |                   |                   |
| omments |   |                  |                   |                   |
| for     |   |                  |                   |                   |
| va      |   |                  |                   |                   |
| nadium, |   |                  |                   |                   |
| unfi    |   |                  |                   |                   |
| ltered, |   |                  |                   |                   |
| labcode |   |                  |                   |                   |
| 3135,   |   |                  |                   |                   |
| p       |   |                  |                   |                   |
| armcode |   |                  |                   |                   |
| 0108    |   |                  |                   |                   |
| 7PLM11* |   |                  |                   |                   |
+---------+---+------------------+-------------------+-------------------+
| From    | H |                  | We performed      | The IRL may be    |
|         | i |                  | maintenance on    | changed to an     |
| QADATA  | g |                  | the instrument    | LT-MDL of 0.5     |
| Summary | h |                  | that initially    | ug/l for the next |
| August  | v |                  | appears to have   | water year.       |
| 2008    | a |                  | improved this     |                   |
|         | r |                  | analysis, but     |                   |
|         | i |                  | data indicate     |                   |
|         | a |                  | that the IRL of   |                   |
|         | b |                  | 0.1 ug/L may be   |                   |
|         | i |                  | changed to an     |                   |
|         | l |                  | LT-MDL of 0.5     |                   |
|         | i |                  | ug/l for the next |                   |
|         | t |                  | water year.       |                   |
|         | y |                  |                   |                   |
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+---------+---+------------------+-------------------+-------------------+
| From    | T |                  | After             | IRL will be       |
|         | h |                  | consultation with | changed to 0.5    |
| QADATA  | e |                  | the BQS the       | ug/L              |
| Summary | h |                  | Interim Reporting |                   |
| June    | i |                  | Level for this    |                   |
| 2008    | g |                  | analysis will be  |                   |
|         | h |                  | changed to 0.5    |                   |
|         | v |                  | ug/L to more      |                   |
|         | a |                  | accurately        |                   |
|         | r |                  | reflect actual    |                   |
|         | i |                  | performance.      |                   |
|         | a |                  |                   |                   |
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+---------+---+------------------+-------------------+-------------------+
| From    | H |                  | The IRL of 0.1    | We will work with |
|         | i |                  | ug/L was an       | BQS to evaluate   |
| QADATA  | g |                  | estimate when the | the IRL and       |
| Summary | h |                  | analytical system | change it if      |
| April   | v |                  | was put on-line   | appropriate.      |
| 2008    | a |                  | in September of   |                   |
|         | r |                  | 2006 and most     |                   |
|         | i |                  | likely incorrect. |                   |
|         | a |                  | This IRL may need |                   |
|         | b |                  | to be raised.     |                   |
|         | i |                  |                   |                   |
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|         | n |                  |                   |                   |
|         | k |                  |                   |                   |
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|         | . |                  |                   |                   |
+---------+---+------------------+-------------------+-------------------+
| From    | H |                  | We are seeing     | We will monitor   |
|         | i |                  | this with our     | the instrument    |
| QADATA  | g |                  | blanks as well.   | closely after the |
| Summary | h |                  | We believe that   | maintenance and   |
| F       | v |                  | the variability   | take appropriate  |
| ebruary | a |                  | is instrumental   | steps based on    |
| 2008    | r |                  | and have          | the information   |
|         | i |                  | contacted the     | gathered at that  |
|         | a |                  | manufacturer to   | time.             |
|         | b |                  | have maintenance  |                   |
|         | i |                  | performed. If the |                   |
|         | l |                  | variability is    |                   |
|         | i |                  | related to the    |                   |
|         | t |                  | instrument aging, |                   |
|         | y |                  | we may need to    |                   |
|         | a |                  | raise the IRL for |                   |
|         | n |                  | this element.     |                   |
|         | d |                  |                   |                   |
|         | a |                  | []{.mark}         |                   |
|         | p |                  |                   |                   |
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+---------+---+------------------+-------------------+-------------------+
|         |   |                  |                   |                   |
+---------+---+------------------+-------------------+-------------------+
| [[]{#n  |   | **The positive   | **On-line charts  | **The NWQL has    |
| wql3138 |   | bias shows       | indicate that the | moved this        |
| .       |   | improvement,     | bias has been     | instrument into   |
| anchor} |   | however, the     | corrected. The    | an enclosed       |
| **Zinc, |   | variability has  | BQS blind sample  | laboratory.       |
| Filtere |   | increased since  | charts indicate   | Moving the        |
| d**](ht |   | the last         | that the          | instrument to an  |
| tp://bq |   | assessment.      | variability has   | enclosed room     |
| s.usgs. |   | Since the last   | increased. This   | should improve    |
| gov/bsp |   | assessment four  | may be due to the | variability while |
| /QADATA |   | out of the last  | instrument        | maintaining the   |
| _all/08 |   | 28 results (14%) | adjustments       | improvements to   |
| Oct/Oct |   | are outside of   | needed to         | the bias. The     |
| 08NWQL0 |   | control          | minimize the      | NWQL will also    |
| 1090PLM |   | limits.**        | bias.**           | reanalyze the     |
| 10.gif) |   |                  |                   | outlier BQS       |
| **      |   | **The same       |                   | samples to        |
| cICP-MS |   | reference        |                   | determine if the  |
| labcode |   | material is      |                   | outliers were     |
| 3138    |   | submitted for    |                   | anomalies or if   |
| p       |   | analysis for     |                   | the values        |
| armcode |   | unfiltered zinc  |                   | repeat.**         |
| 01090   |   | by cICP-MS ([pc  |                   |                   |
| PLM10** |   | 1092PLM11)](     |                   |                   |
|         |   | http://bqs.usgs. |                   |                   |
|         |   | gov/bsp/QADATA_a |                   |                   |
|         |   | ll/08Oct/Oct08NW |                   |                   |
|         |   | QL01092PLM11.gif |                   |                   |
|         |   | )[,]{.underline} |                   |                   |
|         |   | and the data do  |                   |                   |
|         |   | not show a       |                   |                   |
|         |   | variability      |                   |                   |
|         |   | problem.**       |                   |                   |
+---------+---+------------------+-------------------+-------------------+
| *P      |   |                  |                   |                   |
| revious |   |                  |                   |                   |
| c       |   |                  |                   |                   |
| omments |   |                  |                   |                   |
| for     |   |                  |                   |                   |
| zinc,   |   |                  |                   |                   |
| fi      |   |                  |                   |                   |
| ltered, |   |                  |                   |                   |
| labcode |   |                  |                   |                   |
| 3138,   |   |                  |                   |                   |
| p       |   |                  |                   |                   |
| armcode |   |                  |                   |                   |
| 0109    |   |                  |                   |                   |
| 0PLM10* |   |                  |                   |                   |
+---------+---+------------------+-------------------+-------------------+
| From    | T |                  | Charts indicate   | Since the BQS     |
|         | h |                  | that variability  | blind RA samples  |
| QADATA  | e |                  | has been reduced  | do not show a     |
| Summary | h |                  | and the method is | similar bias the  |
| August  | i |                  | operating within  | NWQL will analyze |
| 2008    | g |                  | acceptance        | some BQS RA       |
|         | h |                  | criteria. BQS     | samples using the |
|         | v |                  | blind samples     | FA method and     |
|         | a |                  | indicate a high   | some FA samples   |
|         | r |                  | bias, on-line     | by the RA method. |
|         | i |                  | charts show a     | Results should    |
|         | a |                  | slight low bias.  | help narrow the   |
|         | b |                  | Since the BQS     | possible causes.  |
|         | i |                  | blind RA samples  |                   |
|         | l |                  | do not show a     |                   |
|         | i |                  | similar bias the  |                   |
|         | t |                  | NWQL will analyze |                   |
|         | y |                  | some BQS RA       |                   |
|         | h |                  | samples using the |                   |
|         | a |                  | FA method and     |                   |
|         | s |                  | some FA samples   |                   |
|         | i |                  | by the RA method. |                   |
|         | m |                  | Results should    |                   |
|         | p |                  | help narrow the   |                   |
|         | r |                  | possible causes.  |                   |
|         | o |                  |                   |                   |
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|         | n |                  |                   |                   |
|         | o |                  |                   |                   |
|         | t |                  |                   |                   |
|         | s |                  |                   |                   |
|         | h |                  |                   |                   |
|         | o |                  |                   |                   |
|         | w |                  |                   |                   |
|         | t |                  |                   |                   |
|         | h |                  |                   |                   |
|         | i |                  |                   |                   |
|         | s |                  |                   |                   |
|         | b |                  |                   |                   |
|         | i |                  |                   |                   |
|         | a |                  |                   |                   |
|         | s |                  |                   |                   |
|         | . |                  |                   |                   |
+---------+---+------------------+-------------------+-------------------+
| From    | * |                  | On-line           | We will purchase  |
|         | T |                  | third-party-check | a NIST traceable  |
| QADATA  | h |                  | samples show a    | standard from a   |
| Summary | i |                  | slight low bias.  | different vendor  |
| June    | s |                  | Blind blanks and  | and test BQS      |
| 2008    | m |                  | on-line blanks do | samples and the   |
|         | e |                  | not show any      | current on-line   |
|         | t |                  | bias.             | check samples to  |
|         | h |                  |                   | determine where   |
|         | o |                  |                   | the discrepancy   |
|         | d |                  |                   | is.               |
|         | h |                  |                   |                   |
|         | a |                  |                   |                   |
|         | s |                  |                   |                   |
|         | d |                  |                   |                   |
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|         | m |                  |                   |                   |
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|         | d |                  |                   |                   |
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|         | 1 |                  |                   |                   |
|         | 6 |                  |                   |                   |
|         | m |                  |                   |                   |
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|         | . |                  |                   |                   |
+---------+---+------------------+-------------------+-------------------+
| From    | T |                  | On-line charts    | We will continue  |
|         | h |                  | show similar      | to monitor this   |
| QADATA  | e |                  | improvement.      | line to ensure    |
| Summary | p |                  |                   | that the          |
| April   | o |                  |                   | improvement       |
| 2008    | s |                  |                   | continues.        |
|         | i |                  |                   |                   |
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+---------+---+------------------+-------------------+-------------------+
| From    | T |                  | We have looked at | It will take 2-3  |
|         | h |                  | a number of       | more weeks of     |
| QADATA  | e |                  | possible causes,  | data to ensure    |
| Summary | p |                  | but none of the   | that this         |
| F       | o |                  | attempted         | solution is       |
| ebruary | s |                  | corrections has   | working. We will  |
| 2008    | i |                  | been proven to    | continue to       |
|         | t |                  | correct the issue | monitor this line |
|         | i |                  | yet. The most     | closely and if    |
|         | v |                  | recent            | the line is still |
|         | e |                  | modification to   | having problems   |
|         | b |                  | the calibration   | we will request   |
|         | i |                  | procedure is      | input from the    |
|         | a |                  | showing promise,  | Quality Assurance |
|         | s |                  | but we want to    | Section of the    |
|         | c |                  | see more data to  | NWQL on March 11, |
|         | o |                  | be sure.          | 2008.             |
|         | n |                  |                   |                   |
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+---------+---+------------------+-------------------+-------------------+
| From    | T |                  | On-line QC charts | The NWQL will     |
|         | h |                  | indicate the bias | continue to       |
| QADATA  | e |                  | does not appear   | monitor the       |
| Summary | p |                  | to be related to  | instrument for    |
| D       | o |                  | standards. The    | bias.             |
| ecember | s |                  | bias also does    |                   |
| 2007    | i |                  | not seem to be    |                   |
|         | t |                  | related to        |                   |
|         | i |                  | carry-over or     |                   |
|         | v |                  | contamination.    |                   |
|         | e |                  | The analyst is    |                   |
|         | b |                  | investigating the |                   |
|         | i |                  | possibility of    |                   |
|         | a |                  | interference,     |                   |
|         | s |                  | however, the      |                   |
|         | d |                  | instrument is     |                   |
|         | i |                  | currently         |                   |
|         | s |                  | undergoing        |                   |
|         | p |                  | repair. More      |                   |
|         | l |                  | research needs to |                   |
|         | a |                  | be conducted as   |                   |
|         | y |                  | soon as the       |                   |
|         | e |                  | instrument is     |                   |
|         | d |                  | operational       |                   |
|         | s |                  | again.            |                   |
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|         | t |                  |                   |                   |
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|         | i |                  |                   |                   |
|         | s |                  |                   |                   |
|         | p |                  |                   |                   |
|         | r |                  |                   |                   |
|         | o |                  |                   |                   |
|         | b |                  |                   |                   |
|         | l |                  |                   |                   |
|         | e |                  |                   |                   |
|         | m |                  |                   |                   |
|         | . |                  |                   |                   |
+---------+---+------------------+-------------------+-------------------+
| From    | T |                  | On-line QC was    | The NWQL will     |
|         | h |                  | showing no bias   | make new          |
| >       | i |                  | so the analyst    | calibration and   |
|  QADATA | s |                  | purchased another | check standards   |
| >       | a |                  | standard from a   | from new stock    |
| Summary | n |                  | different source. | solutions.        |
| >       | a |                  | Initial analyses  |                   |
| October | l |                  | show a bias       |                   |
| > 2007  | y |                  | similar to the    |                   |
|         | t |                  | one on the BQS    |                   |
|         | i |                  | charts.           |                   |
|         | c |                  |                   |                   |
|         | a |                  |                   |                   |
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|         | l |                  |                   |                   |
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|         | t |                  |                   |                   |
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|         | m |                  |                   |                   |
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|         | n |                  |                   |                   |
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+---------+---+------------------+-------------------+-------------------+
| From    | A |                  | On-line QC charts | We will monitor   |
|         | l |                  | indicate an equal | the line to see   |
| >       | t |                  | number of points  | if new results    |
|  QADATA | h |                  | above and below   | continue to       |
| >       | o |                  | the MPV at 10 and | improve the       |
| Summary | u |                  | 100 ug/L. At 10   | charts.           |
| >       | g |                  | ug/L there is a   |                   |
|  August | h |                  | difference        |                   |
| > 2007  | t |                  | between the 2     |                   |
|         | h |                  | instruments with  |                   |
|         | e |                  | one trending high |                   |
|         | r |                  | and one trending  |                   |
|         | e |                  | low.              |                   |
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+---------+---+------------------+-------------------+-------------------+
| From    | T |                  |                   | We are making new |
|         | h |                  |                   | standards and we  |
| >       | e |                  |                   | will continue to  |
|  QADATA | p |                  |                   | closely monitor   |
| >       | o |                  |                   | the analysis for  |
| Summary | s |                  |                   | bias.             |
| > June  | i |                  |                   |                   |
| > 2007  | t |                  |                   |                   |
|         | i |                  |                   |                   |
|         | v |                  |                   |                   |
|         | e |                  |                   |                   |
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|         | 0 |                  |                   |                   |
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|         | 9 |                  |                   |                   |
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|         | . |                  |                   |                   |
+---------+---+------------------+-------------------+-------------------+
| From    | T |                  | NWQL QC charts    | We will continue  |
|         | h |                  | indicated a       | to closely        |
| >       | e |                  | similar bias and  | monitor the       |
|  QADATA | d |                  | new calibration   | analysis for      |
| >       | a |                  | standards were    | bias.             |
| Summary | t |                  | prepared in the   |                   |
| > April | a |                  | end of March      |                   |
| > 2007  | d |                  | 2007. We are      |                   |
|         | e |                  | still gathering   |                   |
|         | m |                  | data to see if    |                   |
|         | o |                  | the bias has      |                   |
|         | n |                  | improved.         |                   |
|         | s |                  |                   |                   |
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+---------+---+------------------+-------------------+-------------------+
|         |   |                  |                   |                   |
+---------+---+------------------+-------------------+-------------------+

  -------------------------------------------------------------------------------------------------------------------------------------------------------------
  **Physical Properties**                                                           **Problem**                       **NWQL Comment**     **Corrective
                                                                                                                                           Action**
  --------------------------------------------------------------------------------- ------------- ------------------- -------------------- --------------------
  [[]{#nwql0165 .anchor}**Residue on Evaporation \@105°,                            **A slight                        **The on-line QC     **A senior analyst
  Unfiltered**](http://bqs.usgs.gov/bsp/QADATA_all/08Oct/Oct08NWQL00500ROE12.gif)   positive bias                     samples (SRS and     will perform a
  **Gravimetry labcode 0165 parmcode 00500ROE12**                                   has developed                     Blanks) analyzed by  review of the SOP
                                                                                    as of March                       the NWQL for LC 0165 and be available for
                                                                                    2008.                             do not exhibit the   on-line training
                                                                                    Currently the                     same bias trend for  with the analyst
                                                                                    bias is 5.2%,                     some SRS samples.    within 30 days. A
                                                                                    on average,                       Blank and M-176      senior analyst will
                                                                                    above the                         samples show a       correlate future BQS
                                                                                    target                            slight negative bias data with the oven
                                                                                    value.**                          for FY 08 and M-180  profile for the days
                                                                                                                      shows a positive     of analysis for
                                                                                                                      bias. All are        Oct.-Dec. of 2008.
                                                                                                                      generally stable for Corrective action
                                                                                                                      bias and variability will be taken if
                                                                                                                      for the period       necessary.**
                                                                                                                      October 2007-October 
                                                                                                                      2008. A new oven was 
                                                                                                                      installed in Feb.    
                                                                                                                      2008 and the         
                                                                                                                      temperature is being 
                                                                                                                      monitored.**         

                                                                                                                                           
  -------------------------------------------------------------------------------------------------------------------------------------------------------------