##### QADATA Summary -- June 2005

The Inorganic Blind Sample Project (IBSP) reviews about 110 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 11/01/04
through 06/02/05; however, longer-range charts are 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 district offices, and
the data have the same level of quality-control review as the data
released to the districts. Therefore, any factors that affect the data
displayed on the IBSP quality-control charts should also affect the
districts' data in a similar manner. Data from samples known to have
been affected by a problem independent of the laboratory are not
displayed on the charts.

In this report, the "Problem" is determined and written by IBSP and then
sent to the NWQL. The NWQL then gets two weeks to respond to the issue
by writing a "Lab Comment" and a "Corrective Action." Comments from the
lab 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.

Current charts (updated twice weekly) may be accessed at
<http://bqs.usgs.gov/bsp/FY05charts.htm>. Laboratory and district
personnel can also make their own custom QADATA retrieval to parallel
their objectives by using the QADATA Application online at
[http://bqs.usgs.gov/bsp](http://bqs.usgs.gov/bsp/mainpage.html) (select
QADATA Application button). 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

Nutrients

[Phosphorus, Whole-Water Recoverable,](#nwql2333) Colorimetry, Labcode
2333, Parmcode 0665G 4

Trace Metals

[Cadmium, Filtered,](#nwql1788) ICP-MS, Labcode 1788, Parmcode 1025G 4

[Chromium, Filtered,](#nwql0722) ICP, Labcode 0722, Parmcode 1030E 4

[Copper, Whole-Water Recoverable,](#nwql1559) GFAA, Labcode 1559,
Parmcode 1042F 5

[Copper, Whole-Water Recoverable,](#nwql2379) ICP-MS, Labcode 2379,
Parmcode 1042H 6

[Manganese, Whole-Water Recoverable,](#nwql2382) ICP-MS, Labcode 2382,
Parmcode 1055C 6

[Zinc, Whole-Water Recoverable,](#nwql2390) ICP-MS, Labcode 2390,
Parmcode 1092D 7

Majors

[Fluoride, Filtered,](#nwql0031) ISE, Labcode 0031, Parmcode 0950B 8

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

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

1.  [Phosphorus](http://bqs.usgs.gov/bsp/QADATA_all/05JUN/JUN05NWQL00665G.gif)
    by Colorimetry, whole-water recoverable, parmcode 0665G -- Positive
    bias starting around April 2005.

2.  [Cadmium](http://bqs.usgs.gov/bsp/QADATA_all/05JUN/JUN05NWQL01025G.gif)
    by ICP-MS, filtered, parmcode 1025G -- Long-term positive bias
    increasing around February 2005.

3.  [Chromium](http://bqs.usgs.gov/bsp/QADATA_all/05JUN/JUN05NWQL01030E.gif)
    by ICP, filtered, parmcode 1030E -- Positive bias showing
    improvement.

4.  [Copper](http://bqs.usgs.gov/bsp/QADATA_all/05JUN/JUN05NWQL01042F.gif)
    by GFAA, whole-water recoverable, parmcode 1042F -- Long-term
    positive bias starting around May 2004.

5.  [Copper](http://bqs.usgs.gov/bsp/QADATA_all/05JUN/JUN05NWQL01042H.gif)
    by ICP-MS, whole-water recoverable, parmcode 1042H -- Positive bias
    starting around mid-November 2004.

6.  [Fluoride](http://bqs.usgs.gov/bsp/QADATA_all/05JUN/JUN05NWQL00950B.gif)
    by ISE, filtered, parmcode 0950B -- Positive bias starting
    mid-November 2004.

7.  [Manganese](http://bqs.usgs.gov/bsp/QADATA_all/05JUN/JUN05NWQL01055C.gif)
    by ICP-MS, whole-water recoverable, parmcode 1055C-- Previous
    negative bias has improved.

8.  [Zinc](http://bqs.usgs.gov/bsp/QADATA_all/05JUN/JUN05NWQL01092D.gif)
    by ICP-MS, whole-water recoverable, parmcode 1092D -- Negative bias
    starting December 2004 showing improvement.

NWQL PERFORMANCE ON IBSP SAMPLES

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

+----------+------------------+-------------------+-------------------+
| **       | **Problem**      | **NWQL**          | **Corrective**    |
| Nutrient |                  |                   |                   |
| Determin |                  | **Lab Comment**   | **Action**        |
| ations** |                  |                   |                   |
+==========+==================+===================+===================+
| [[]{#    | **All results    | **Working         | **Since the       |
| nwql2333 | received since   | standards         | preparation of    |
| .anch    | April 2005 are   | prepared and put  | new standards,    |
| or}**Pho | higher than the  | online April 4th  | the bias seems to |
| sphorus, | target value and | appear to have    | have improved. We |
| Who      | exhibit an       | been prepared     | will continue to  |
| le-Water | overall positive | from a degrading  | closely monitor   |
| Reco     | bias of 5.8%     | stock. After high | the line.**       |
| verable* | above the target | bias was noted by |                   |
| *](http: | value.**         | analyst, a new    |                   |
| //bqs.us |                  | stock standard    |                   |
| gs.gov/b | **A bias of this | was ordered. New  |                   |
| sp/QADAT | magnitude is not | working standards |                   |
| A_all/05 | evident for      | put online on May |                   |
| JUN/JUN0 | phosphorus,      | 18.**             |                   |
| 5NWQL006 | filtered (lc     |                   |                   |
| 65G.gif) | 2331).**         |                   |                   |
| **L      |                  |                   |                   |
| ow-level |                  |                   |                   |
| Col      |                  |                   |                   |
| orimetry |                  |                   |                   |
| labcode  |                  |                   |                   |
| 2333     |                  |                   |                   |
| parmcode |                  |                   |                   |
| 0665G**  |                  |                   |                   |
+----------+------------------+-------------------+-------------------+
|          |                  |                   |                   |
+----------+------------------+-------------------+-------------------+

+---------+---+------------------+-------------------+-------------------+
| **Trace | * |                  | **NWQL**          | **Corrective**    |
| Metal   | * |                  |                   |                   |
| De      | P |                  | **Comment**       | **Action**        |
| termina | r |                  |                   |                   |
| tions** | o |                  |                   |                   |
|         | b |                  |                   |                   |
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|         | e |                  |                   |                   |
|         | m |                  |                   |                   |
|         | * |                  |                   |                   |
|         | * |                  |                   |                   |
+=========+===+==================+===================+===================+
| [[]{#n  | * |                  | **Online QC       | **We have no      |
| wql1788 | * |                  | charts do not     | explanation for   |
| .anc    | D |                  | indicate a bias.  | the bias observed |
| hor}**C | a |                  | The calibration   | in the BQS        |
| admium, | t |                  | standards were    | charts. We will   |
| Fil     | a |                  | run by ICP with a | work with BQS to  |
| tered** | i |                  | percent           | identify the      |
| ](http: | n |                  | difference of 2%  | cause of the      |
| //bqs.u | d |                  | or less. SRS T145 | bias.**           |
| sgs.gov | i |                  | was run with a    |                   |
| /bsp/QA | c |                  | result of 9.8ug/L |                   |
| DATA_al | a |                  | (limits are 8.51  |                   |
| l/05JUN | t |                  | -- 10.15 ug/L). A |                   |
| /JUN05N | e |                  | NIST standard was |                   |
| WQL0102 | a |                  | run with a value  |                   |
| 5G.gif) | p |                  | of 20.18 ug/L     |                   |
| *       | o |                  | (Theoretical      |                   |
| *ICP-MS | s |                  | value= 20         |                   |
| labcode | i |                  | ug/L).**          |                   |
| 1788    | t |                  |                   |                   |
| p       | i |                  |                   |                   |
| armcode | v |                  |                   |                   |
| 1025G** | e |                  |                   |                   |
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+---------+---+------------------+-------------------+-------------------+
|         |   |                  |                   |                   |
+---------+---+------------------+-------------------+-------------------+
| [[]{#n  | * |                  |                   |                   |
| wql0722 | * |                  |                   |                   |
| .anch   | T |                  |                   |                   |
| or}**Ch | h |                  |                   |                   |
| romium, | e |                  |                   |                   |
| Fil     | p |                  |                   |                   |
| tered** | r |                  |                   |                   |
| ](http: | e |                  |                   |                   |
| //bqs.u | v |                  |                   |                   |
| sgs.gov | i |                  |                   |                   |
| /bsp/QA | o |                  |                   |                   |
| DATA_al | u |                  |                   |                   |
| l/05JUN | s |                  |                   |                   |
| /JUN05N | l |                  |                   |                   |
| WQL0103 | y |                  |                   |                   |
| 0E.gif) | n |                  |                   |                   |
| **ICP   | o |                  |                   |                   |
| labcode | t |                  |                   |                   |
| 0722    | e |                  |                   |                   |
| p       | d |                  |                   |                   |
| armcode | p |                  |                   |                   |
| 1030E** | o |                  |                   |                   |
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+---------+---+------------------+-------------------+-------------------+
| *P      |   |                  |                   |                   |
| revious |   |                  |                   |                   |
| c       |   |                  |                   |                   |
| omments |   |                  |                   |                   |
| for     |   |                  |                   |                   |
| ch      |   |                  |                   |                   |
| romium, |   |                  |                   |                   |
| fi      |   |                  |                   |                   |
| ltered, |   |                  |                   |                   |
| ICP,    |   |                  |                   |                   |
| labcode |   |                  |                   |                   |
| 0722,   |   |                  |                   |                   |
| p       |   |                  |                   |                   |
| armcode |   |                  |                   |                   |
| 1030E*  |   |                  |                   |                   |
+---------+---+------------------+-------------------+-------------------+
| From    | D |                  | Standards were    | We believe the    |
|         | a |                  | prepared and      | bias has been     |
| >       | t |                  | verified in       | corrected and     |
|  QADATA | a |                  | February. The     | will continue to  |
| >       | s |                  | slight bias on    | monitor.          |
| Summary | t |                  | internal control  |                   |
| > April | i |                  | charts has        |                   |
| > 2005  | l |                  | decreased         |                   |
|         | l |                  | starting about    |                   |
|         | d |                  | March 2005. Upon  |                   |
|         | e |                  | request by BQS,   |                   |
|         | m |                  | samples analyzed  |                   |
|         | o |                  | before the bias   |                   |
|         | n |                  | appeared were     |                   |
|         | s |                  | re-analyzed after |                   |
|         | t |                  | the new standards |                   |
|         | r |                  | were prepared.    |                   |
|         | a |                  | The results       |                   |
|         | t |                  | duplicate within  |                   |
|         | e |                  | the precision of  |                   |
|         | a |                  | the method,       |                   |
|         | p |                  | suggesting the    |                   |
|         | o |                  | new standards may |                   |
|         | s |                  | have corrected    |                   |
|         | i |                  | the bias.         |                   |
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+---------+---+------------------+-------------------+-------------------+
| From    | D |                  | We have reviewed  | We have no        |
|         | a |                  | internal QC data  | explanation for   |
| >       | t |                  | and we do not     | the bias. We will |
|  QADATA | a |                  | have an           | continue to       |
| >       | e |                  | explanation for   | monitor the       |
| Summary | x |                  | the bias observed | situation and     |
| > F     | h |                  | by BQS. NWQL QC   | attempt to find   |
| ebruary | i |                  | charts show a     | the cause and     |
| > 2005  | b |                  | very slight bias, | review the data   |
|         | i |                  | but within        | with BQS in a     |
|         | t |                  | acceptance        | month.            |
|         | a |                  | criteria.         |                   |
|         | n |                  |                   |                   |
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|         | 2 |                  |                   |                   |
|         | 0 |                  |                   |                   |
|         | 0 |                  |                   |                   |
|         | 4 |                  |                   |                   |
|         | . |                  |                   |                   |
+---------+---+------------------+-------------------+-------------------+
|         |   |                  |                   |                   |
+---------+---+------------------+-------------------+-------------------+
| [[]{#n  | * |                  | **There have been | **We will         |
| wql1559 | * |                  | several service   | continue to       |
| .an     | A |                  | calls made on the | monitor           |
| chor}** | p |                  | GFAA instrument   | performance and   |
| Copper, | o |                  | since the         | work with BQS to  |
| Whol    | s |                  | beginning of the  | identify the      |
| e-Water | i |                  | year. The furnace | cause of the      |
| Re      | t |                  | has been serviced | bias.**           |
| coverab | i |                  | and is planned to |                   |
| le**](h | v |                  | be replaced when  |                   |
| ttp://b | e |                  | the part arrives  |                   |
| qs.usgs | b |                  | within the next 2 |                   |
| .gov/bs | i |                  | weeks. The        |                   |
| p/QADAT | a |                  | temperature       |                   |
| A_all/0 | s |                  | program for the   |                   |
| 5JUN/JU | i |                  | furnace have been |                   |
| N05NWQL | s |                  | reviewed and      |                   |
| 01042F. | s |                  | optimized.**      |                   |
| gif)**\ | t |                  |                   |                   |
| GFAA    | i |                  |                   |                   |
| labcode | l |                  |                   |                   |
| 1559    | l |                  |                   |                   |
| p       | p |                  |                   |                   |
| armcode | r |                  |                   |                   |
| 1042F** | e |                  |                   |                   |
|         | s |                  |                   |                   |
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|         | * |                  |                   |                   |
|         | * |                  |                   |                   |
+---------+---+------------------+-------------------+-------------------+
| *P      |   |                  |                   |                   |
| revious |   |                  |                   |                   |
| c       |   |                  |                   |                   |
| omments |   |                  |                   |                   |
| for     |   |                  |                   |                   |
| copper, |   |                  |                   |                   |
| whol    |   |                  |                   |                   |
| e-water |   |                  |                   |                   |
| recov   |   |                  |                   |                   |
| erable, |   |                  |                   |                   |
| GFAA,   |   |                  |                   |                   |
| labcode |   |                  |                   |                   |
| 1559,   |   |                  |                   |                   |
| p       |   |                  |                   |                   |
| armcode |   |                  |                   |                   |
| 1042F*  |   |                  |                   |                   |
+---------+---+------------------+-------------------+-------------------+
| From    | R |                  | The slight bias   | We have no        |
|         | e |                  | on internal QC    | explanation for   |
| >       | s |                  | charts described  | the continued     |
|  QADATA | u |                  | in the last       | bias and          |
| >       | l |                  | summary has       | variability, and  |
| Summary | t |                  | lessened since    | will continue to  |
| > April | s |                  | mid-January 2005. | work with BQS to  |
| > 2005  | r |                  | The in-bottle     | resolve the bias  |
|         | e |                  | digestion spike   | and variability.  |
|         | c |                  | charts show no    |                   |
|         | e |                  | bias or changes   |                   |
|         | i |                  | in variability    |                   |
|         | v |                  | from October 2004 |                   |
|         | e |                  | to present. The   |                   |
|         | d |                  | QC for the runs   |                   |
|         | s |                  | with the outlier  |                   |
|         | i |                  | BQS samples was   |                   |
|         | n |                  | acceptable. There |                   |
|         | c |                  | were no carryover |                   |
|         | e |                  | problems or       |                   |
|         | t |                  | sample mispours.  |                   |
|         | h |                  |                   |                   |
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|         | a |                  |                   |                   |
|         | b |                  |                   |                   |
|         | i |                  |                   |                   |
|         | l |                  |                   |                   |
|         | i |                  |                   |                   |
|         | t |                  |                   |                   |
|         | y |                  |                   |                   |
|         | s |                  |                   |                   |
|         | e |                  |                   |                   |
|         | e |                  |                   |                   |
|         | m |                  |                   |                   |
|         | s |                  |                   |                   |
|         | t |                  |                   |                   |
|         | o |                  |                   |                   |
|         | b |                  |                   |                   |
|         | e |                  |                   |                   |
|         | i |                  |                   |                   |
|         | n |                  |                   |                   |
|         | c |                  |                   |                   |
|         | r |                  |                   |                   |
|         | e |                  |                   |                   |
|         | a |                  |                   |                   |
|         | s |                  |                   |                   |
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|         | g |                  |                   |                   |
|         | . |                  |                   |                   |
|         | F |                  |                   |                   |
|         | o |                  |                   |                   |
|         | u |                  |                   |                   |
|         | r |                  |                   |                   |
|         | o |                  |                   |                   |
|         | u |                  |                   |                   |
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|         | f |                  |                   |                   |
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|         | h |                  |                   |                   |
|         | e |                  |                   |                   |
|         | l |                  |                   |                   |
|         | a |                  |                   |                   |
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|         | t |                  |                   |                   |
|         | 1 |                  |                   |                   |
|         | 9 |                  |                   |                   |
|         | r |                  |                   |                   |
|         | e |                  |                   |                   |
|         | s |                  |                   |                   |
|         | u |                  |                   |                   |
|         | l |                  |                   |                   |
|         | t |                  |                   |                   |
|         | s |                  |                   |                   |
|         | ( |                  |                   |                   |
|         | 2 |                  |                   |                   |
|         | 1 |                  |                   |                   |
|         | % |                  |                   |                   |
|         | ) |                  |                   |                   |
|         | a |                  |                   |                   |
|         | r |                  |                   |                   |
|         | e |                  |                   |                   |
|         | o |                  |                   |                   |
|         | u |                  |                   |                   |
|         | t |                  |                   |                   |
|         | s |                  |                   |                   |
|         | i |                  |                   |                   |
|         | d |                  |                   |                   |
|         | e |                  |                   |                   |
|         | + |                  |                   |                   |
|         | / |                  |                   |                   |
|         | - |                  |                   |                   |
|         | 2 |                  |                   |                   |
|         | f |                  |                   |                   |
|         | ‑ |                  |                   |                   |
|         | p |                  |                   |                   |
|         | s |                  |                   |                   |
|         | e |                  |                   |                   |
|         | u |                  |                   |                   |
|         | d |                  |                   |                   |
|         | o |                  |                   |                   |
|         | s |                  |                   |                   |
|         | i |                  |                   |                   |
|         | g |                  |                   |                   |
|         | m |                  |                   |                   |
|         | a |                  |                   |                   |
|         | . |                  |                   |                   |
+---------+---+------------------+-------------------+-------------------+
| From    | A |                  | NWQL QC charts    | We will work with |
|         | p |                  | continue to show  | BQS to resolve    |
| >       | o |                  | slight positive   | the bias issue.   |
|  QADATA | s |                  | bias, but within  |                   |
| >       | i |                  | acceptance        |                   |
| Summary | t |                  | criteria since    |                   |
| > F     | i |                  | standards were    |                   |
| ebruary | v |                  | prepared          |                   |
| > 2005  | e |                  | September 27,     |                   |
|         | b |                  | 2004.             |                   |
|         | i |                  |                   |                   |
|         | a |                  |                   |                   |
|         | s |                  |                   |                   |
|         | i |                  |                   |                   |
|         | s |                  |                   |                   |
|         | s |                  |                   |                   |
|         | t |                  |                   |                   |
|         | i |                  |                   |                   |
|         | l |                  |                   |                   |
|         | l |                  |                   |                   |
|         | d |                  |                   |                   |
|         | e |                  |                   |                   |
|         | m |                  |                   |                   |
|         | o |                  |                   |                   |
|         | n |                  |                   |                   |
|         | s |                  |                   |                   |
|         | t |                  |                   |                   |
|         | r |                  |                   |                   |
|         | a |                  |                   |                   |
|         | t |                  |                   |                   |
|         | e |                  |                   |                   |
|         | d |                  |                   |                   |
|         | . |                  |                   |                   |
|         | F |                  |                   |                   |
|         | o |                  |                   |                   |
|         | r |                  |                   |                   |
|         | t |                  |                   |                   |
|         | y |                  |                   |                   |
|         | o |                  |                   |                   |
|         | f |                  |                   |                   |
|         | t |                  |                   |                   |
|         | h |                  |                   |                   |
|         | e |                  |                   |                   |
|         | l |                  |                   |                   |
|         | a |                  |                   |                   |
|         | s |                  |                   |                   |
|         | t |                  |                   |                   |
|         | 4 |                  |                   |                   |
|         | 3 |                  |                   |                   |
|         | r |                  |                   |                   |
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|         | s |                  |                   |                   |
|         | u |                  |                   |                   |
|         | l |                  |                   |                   |
|         | t |                  |                   |                   |
|         | s |                  |                   |                   |
|         | ( |                  |                   |                   |
|         | o |                  |                   |                   |
|         | v |                  |                   |                   |
|         | e |                  |                   |                   |
|         | r |                  |                   |                   |
|         | t |                  |                   |                   |
|         | h |                  |                   |                   |
|         | e |                  |                   |                   |
|         | l |                  |                   |                   |
|         | a |                  |                   |                   |
|         | s |                  |                   |                   |
|         | t |                  |                   |                   |
|         | 1 |                  |                   |                   |
|         | 0 |                  |                   |                   |
|         | m |                  |                   |                   |
|         | o |                  |                   |                   |
|         | n |                  |                   |                   |
|         | t |                  |                   |                   |
|         | h |                  |                   |                   |
|         | s |                  |                   |                   |
|         | ) |                  |                   |                   |
|         | a |                  |                   |                   |
|         | r |                  |                   |                   |
|         | e |                  |                   |                   |
|         | h |                  |                   |                   |
|         | i |                  |                   |                   |
|         | g |                  |                   |                   |
|         | h |                  |                   |                   |
|         | e |                  |                   |                   |
|         | r |                  |                   |                   |
|         | t |                  |                   |                   |
|         | h |                  |                   |                   |
|         | a |                  |                   |                   |
|         | n |                  |                   |                   |
|         | t |                  |                   |                   |
|         | h |                  |                   |                   |
|         | e |                  |                   |                   |
|         | t |                  |                   |                   |
|         | a |                  |                   |                   |
|         | r |                  |                   |                   |
|         | g |                  |                   |                   |
|         | e |                  |                   |                   |
|         | t |                  |                   |                   |
|         | v |                  |                   |                   |
|         | a |                  |                   |                   |
|         | l |                  |                   |                   |
|         | u |                  |                   |                   |
|         | e |                  |                   |                   |
|         | . |                  |                   |                   |
+---------+---+------------------+-------------------+-------------------+
| From    | D |                  | NWQL QC charts    | NWQL will         |
|         | a |                  | from May to       | continue to       |
| >       | t |                  | September show a  | closely monitor   |
|  QADATA | a |                  | positive bias of  | analysis for a    |
| >       | s |                  | about 5%. New     | bias.             |
| Summary | h |                  | standards were    |                   |
| > N     | o |                  | prepared and      |                   |
| ovember | w |                  | verified on       |                   |
| > 2004  | a |                  | September 27th,   |                   |
|         | p |                  | 2004. The current |                   |
|         | o |                  | bias is \<1%.     |                   |
|         | s |                  |                   |                   |
|         | i |                  |                   |                   |
|         | t |                  |                   |                   |
|         | i |                  |                   |                   |
|         | v |                  |                   |                   |
|         | e |                  |                   |                   |
|         | b |                  |                   |                   |
|         | i |                  |                   |                   |
|         | a |                  |                   |                   |
|         | s |                  |                   |                   |
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|         | 1 |                  |                   |                   |
|         | 2 |                  |                   |                   |
|         | . |                  |                   |                   |
|         | 8 |                  |                   |                   |
|         | % |                  |                   |                   |
|         | ) |                  |                   |                   |
|         | t |                  |                   |                   |
|         | h |                  |                   |                   |
|         | r |                  |                   |                   |
|         | o |                  |                   |                   |
|         | u |                  |                   |                   |
|         | g |                  |                   |                   |
|         | h |                  |                   |                   |
|         | o |                  |                   |                   |
|         | u |                  |                   |                   |
|         | t |                  |                   |                   |
|         | t |                  |                   |                   |
|         | h |                  |                   |                   |
|         | e |                  |                   |                   |
|         | l |                  |                   |                   |
|         | a |                  |                   |                   |
|         | s |                  |                   |                   |
|         | t |                  |                   |                   |
|         | s |                  |                   |                   |
|         | i |                  |                   |                   |
|         | x |                  |                   |                   |
|         | m |                  |                   |                   |
|         | o |                  |                   |                   |
|         | n |                  |                   |                   |
|         | t |                  |                   |                   |
|         | h |                  |                   |                   |
|         | s |                  |                   |                   |
|         | . |                  |                   |                   |
|         | A |                  |                   |                   |
|         | l |                  |                   |                   |
|         | l |                  |                   |                   |
|         | r |                  |                   |                   |
|         | e |                  |                   |                   |
|         | s |                  |                   |                   |
|         | u |                  |                   |                   |
|         | l |                  |                   |                   |
|         | t |                  |                   |                   |
|         | s |                  |                   |                   |
|         | ( |                  |                   |                   |
|         | 2 |                  |                   |                   |
|         | 5 |                  |                   |                   |
|         | v |                  |                   |                   |
|         | a |                  |                   |                   |
|         | l |                  |                   |                   |
|         | u |                  |                   |                   |
|         | e |                  |                   |                   |
|         | s |                  |                   |                   |
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|         | a |                  |                   |                   |
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|         | a |                  |                   |                   |
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|         | r |                  |                   |                   |
|         | t |                  |                   |                   |
|         | h |                  |                   |                   |
|         | a |                  |                   |                   |
|         | n |                  |                   |                   |
|         | t |                  |                   |                   |
|         | h |                  |                   |                   |
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|         | M |                  |                   |                   |
|         | P |                  |                   |                   |
|         | V |                  |                   |                   |
|         | . |                  |                   |                   |
+---------+---+------------------+-------------------+-------------------+
|         |   |                  |                   |                   |
+---------+---+------------------+-------------------+-------------------+
| [[]{#n  | * |                  | **An NIST         | **We continue to  |
| wql2379 | * |                  | standard analyzed | have no           |
| .an     | D |                  | using the         | explanation of    |
| chor}** | a |                  | previous          | the bias. We will |
| Copper, | t |                  | calibration       | continue to       |
| Whol    | a |                  | standards was     | monitor.**        |
| e-Water | s |                  | 263.9 ug/L with a |                   |
| Re      | t |                  | theoretical value |                   |
| coverab | i |                  | of 262.3 ug/L.    |                   |
| le**](h | l |                  | After preparing   |                   |
| ttp://b | l |                  | new standards the |                   |
| qs.usgs | d |                  | NIST standard was |                   |
| .gov/bs | e |                  | 265.4 ug/L        |                   |
| p/QADAT | m |                  | showing a percent |                   |
| A_all/0 | o |                  | difference of     |                   |
| 5JUN/JU | n |                  | 1.2%. As          |                   |
| N05NWQL | s |                  | discussed at the  |                   |
| 01042H. | t |                  | QA meeting,       |                   |
| gif)**\ | r |                  | digested and      |                   |
| ICP-MS  | a |                  | undigested spike  |                   |
| labcode | t |                  | standards were    |                   |
| 2379    | e |                  | analyzed. The     |                   |
| p       | a |                  | results for the   |                   |
| armcode | p |                  | digested spike    |                   |
| 1042H** | o |                  | are: 52.395 ug/L  |                   |
|         | s |                  | (expected value   |                   |
|         | i |                  | 50 ug/L) giving a |                   |
|         | t |                  | 4.8% percent      |                   |
|         | i |                  | difference. The   |                   |
|         | v |                  | results for the   |                   |
|         | e |                  | undigested spike  |                   |
|         | b |                  | are: 52.78 ug/L   |                   |
|         | i |                  | (expected value   |                   |
|         | a |                  | 50 ug/L) giving a |                   |
|         | s |                  | 5.4 percent       |                   |
|         | . |                  | difference.**     |                   |
|         | A |                  |                   |                   |
|         | b |                  |                   |                   |
|         | i |                  |                   |                   |
|         | a |                  |                   |                   |
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|         | o |                  |                   |                   |
|         | f |                  |                   |                   |
|         | t |                  |                   |                   |
|         | h |                  |                   |                   |
|         | i |                  |                   |                   |
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|         | a |                  |                   |                   |
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|         | d |                  |                   |                   |
|         | e |                  |                   |                   |
|         | i |                  |                   |                   |
|         | s |                  |                   |                   |
|         | n |                  |                   |                   |
|         | o |                  |                   |                   |
|         | t |                  |                   |                   |
|         | d |                  |                   |                   |
|         | e |                  |                   |                   |
|         | m |                  |                   |                   |
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|         | n |                  |                   |                   |
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|         | d |                  |                   |                   |
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|         | l |                  |                   |                   |
|         | t |                  |                   |                   |
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|         | r |                  |                   |                   |
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|         | d |                  |                   |                   |
|         | c |                  |                   |                   |
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|         | b |                  |                   |                   |
|         | y |                  |                   |                   |
|         | I |                  |                   |                   |
|         | C |                  |                   |                   |
|         | P |                  |                   |                   |
|         | - |                  |                   |                   |
|         | M |                  |                   |                   |
|         | S |                  |                   |                   |
|         | ( |                  |                   |                   |
|         | l |                  |                   |                   |
|         | c |                  |                   |                   |
|         | 1 |                  |                   |                   |
|         | 7 |                  |                   |                   |
|         | 9 |                  |                   |                   |
|         | 1 |                  |                   |                   |
|         | ) |                  |                   |                   |
|         | . |                  |                   |                   |
|         | * |                  |                   |                   |
|         | * |                  |                   |                   |
+---------+---+------------------+-------------------+-------------------+
| *P      |   |                  |                   |                   |
| revious |   |                  |                   |                   |
| c       |   |                  |                   |                   |
| omments |   |                  |                   |                   |
| for     |   |                  |                   |                   |
| copper, |   |                  |                   |                   |
| whol    |   |                  |                   |                   |
| e-water |   |                  |                   |                   |
| recov   |   |                  |                   |                   |
| erable, |   |                  |                   |                   |
| ICP-MS, |   |                  |                   |                   |
| labcode |   |                  |                   |                   |
| 2379,   |   |                  |                   |                   |
| p       |   |                  |                   |                   |
| armcode |   |                  |                   |                   |
| 1042H*  |   |                  |                   |                   |
+---------+---+------------------+-------------------+-------------------+
| From    | R |                  | As discussed at a | We have no        |
|         | e |                  | meeting with BQS, | explanation for   |
| >       | s |                  | the internal      | the continued     |
|  QADATA | u |                  | charts have shown | bias and suggest  |
| >       | l |                  | no bias and no    | further work with |
| Summary | t |                  | changes in        | BQS to ascertain  |
| > April | s |                  | variability in    | the cause of      |
| > 2005  | r |                  | performance going | bias.             |
|         | e |                  | back to October   |                   |
|         | c |                  | 2003.             |                   |
|         | e |                  |                   |                   |
|         | i |                  | []{.mark}         |                   |
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|         | . |                  |                   |                   |
+---------+---+------------------+-------------------+-------------------+
| From    | D |                  | The NWQL QC       | The NWQL will     |
|         | a |                  | charts do not     | review and        |
| >       | t |                  | show an upward    | compare internal  |
|  QADATA | a |                  | trend.            | QC information    |
| >       | e |                  |                   | with BQS in one   |
| Summary | x |                  |                   | month. The NWQL   |
| > F     | h |                  |                   | will work with    |
| ebruary | i |                  |                   | BQS if the trend  |
| > 2005  | b |                  |                   | continues.        |
|         | i |                  |                   | []{.mark}         |
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+---------+---+------------------+-------------------+-------------------+
| []      |   |                  |                   |                   |
| {.mark} |   |                  |                   |                   |
+---------+---+------------------+-------------------+-------------------+
| [[]{#n  | * |                  |                   |                   |
| wql2382 | * |                  |                   |                   |
| .ancho  | T |                  |                   |                   |
| r}**Man | h |                  |                   |                   |
| ganese, | e |                  |                   |                   |
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| rable** | v |                  |                   |                   |
| ](http: | i |                  |                   |                   |
| //bqs.u | o |                  |                   |                   |
| sgs.gov | u |                  |                   |                   |
| /bsp/QA | s |                  |                   |                   |
| DATA_al | l |                  |                   |                   |
| l/05JUN | y |                  |                   |                   |
| /JUN05N | n |                  |                   |                   |
| WQL0105 | o |                  |                   |                   |
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+---------+---+------------------+-------------------+-------------------+
| *P      |   |                  |                   |                   |
| revious |   |                  |                   |                   |
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| omments |   |                  |                   |                   |
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| recov   |   |                  |                   |                   |
| erable, |   |                  |                   |                   |
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| 2382,   |   |                  |                   |                   |
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| 1055C*  |   |                  |                   |                   |
+---------+---+------------------+-------------------+-------------------+
| From    | A |                  | The bias still    | We will prepare   |
|         | l |                  | exists, although  | and verify new    |
| >       | l |                  | not as large as   | calibration       |
|  QADATA | r |                  | observed on the   | standards by May  |
| >       | e |                  | BQS charts. New   | 6, 2005 and will  |
| Summary | s |                  | single element    | continue to       |
| > April | u |                  | calibration       | monitor.          |
| > 2005  | l |                  | standards will be |                   |
|         | t |                  | prepared. If the  |                   |
|         | s |                  | new standards are |                   |
|         | s |                  | acceptable, we    |                   |
|         | i |                  | believe the bias  |                   |
|         | n |                  | will improve as   |                   |
|         | c |                  | it has for the    |                   |
|         | e |                  | manganese,        |                   |
|         | M |                  | filtered charts.  |                   |
|         | a |                  | Discussions with  |                   |
|         | r |                  | Methods Research  |                   |
|         | c |                  | and Development   |                   |
|         | h |                  | did not result in |                   |
|         | 2 |                  | any additional    |                   |
|         | 0 |                  | suggestions for   |                   |
|         | 0 |                  | corrective        |                   |
|         | 4 |                  | action.           |                   |
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+---------+---+------------------+-------------------+-------------------+
| From    | D |                  | The internal QC   | The NWQL will     |
|         | a |                  | chart confirms    | work with BQS and |
| >       | t |                  | the bias in the   | Methods Research  |
|  QADATA | a |                  | BQS chart.        | and Development   |
| >       | i |                  | []{.mark}         | to determine the  |
| Summary | n |                  |                   | cause of the bias |
| > F     | d |                  |                   | observed on the   |
| ebruary | i |                  |                   | BQS and NWQL      |
| > 2005  | c |                  |                   | charts.           |
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+---------+---+------------------+-------------------+-------------------+
| []      |   |                  |                   |                   |
| {.mark} |   |                  |                   |                   |
+---------+---+------------------+-------------------+-------------------+
| [[]{#n  | * |                  |                   |                   |
| wql2390 | * |                  |                   |                   |
| .       | T |                  |                   |                   |
| anchor} | h |                  |                   |                   |
| **Zinc, | e |                  |                   |                   |
| Whol    | p |                  |                   |                   |
| e-Water | r |                  |                   |                   |
| Recove  | e |                  |                   |                   |
| rable** | v |                  |                   |                   |
| ](http: | i |                  |                   |                   |
| //bqs.u | o |                  |                   |                   |
| sgs.gov | u |                  |                   |                   |
| /bsp/QA | s |                  |                   |                   |
| DATA_al | l |                  |                   |                   |
| l/05JUN | y |                  |                   |                   |
| /JUN05N | n |                  |                   |                   |
| WQL0109 | o |                  |                   |                   |
| 2D.gif) | t |                  |                   |                   |
| *       | e |                  |                   |                   |
| *ICP-MS | d |                  |                   |                   |
| labcode | n |                  |                   |                   |
| 2390    | e |                  |                   |                   |
| p       | g |                  |                   |                   |
| armcode | a |                  |                   |                   |
| 1092D** | t |                  |                   |                   |
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|         | * |                  |                   |                   |
|         | * |                  |                   |                   |
+---------+---+------------------+-------------------+-------------------+
| *P      |   |                  |                   |                   |
| revious |   |                  |                   |                   |
| c       |   |                  |                   |                   |
| omments |   |                  |                   |                   |
| for     |   |                  |                   |                   |
| zinc,   |   |                  |                   |                   |
| whol    |   |                  |                   |                   |
| e-water |   |                  |                   |                   |
| recov   |   |                  |                   |                   |
| erable, |   |                  |                   |                   |
| ICP-MS, |   |                  |                   |                   |
| labcode |   |                  |                   |                   |
| 2382,   |   |                  |                   |                   |
| p       |   |                  |                   |                   |
| armcode |   |                  |                   |                   |
| 1055C*  |   |                  |                   |                   |
+---------+---+------------------+-------------------+-------------------+
| From    | D |                  | One internal      | We have no        |
|         | a |                  | chart shows a -4% | explanation for   |
| >       | t |                  | bias for December | the low bias      |
|  QADATA | a |                  | 2004 only and no  | observed in the   |
| >       | s |                  | bias is observed  | BQS charts. We    |
| Summary | i |                  | on all charts for | will continue to  |
| > April | n |                  | the remaining     | monitor for the   |
| > 2005  | c |                  | time period.      | low bias and      |
|         | e |                  |                   | review with BQS   |
|         | D |                  |                   | in one month.     |
|         | e |                  |                   |                   |
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|         | M |                  |                   |                   |
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|         | . |                  |                   |                   |
+---------+---+------------------+-------------------+-------------------+
|         |   |                  |                   |                   |
+---------+---+------------------+-------------------+-------------------+

+---------+---+------------------+-------------------+-------------------+
| **Major | * |                  | **NWQL**          | **Corrective**    |
| De      | * |                  |                   |                   |
| termina | P |                  | **Comment**       | **Action**        |
| tions** | r |                  |                   |                   |
|         | o |                  |                   |                   |
|         | b |                  |                   |                   |
|         | l |                  |                   |                   |
|         | e |                  |                   |                   |
|         | m |                  |                   |                   |
|         | * |                  |                   |                   |
|         | * |                  |                   |                   |
+=========+===+==================+===================+===================+
| [[]{#n  | * |                  | **New standards   | **Continue        |
| wql0031 | * |                  | prepared early    | monitoring line   |
| .anch   | D |                  | May and new       | and discuss with  |
| or}**Fl | a |                  | electrode         | BQS during next   |
| uoride, | t |                  | installed May 18. | meeting.**        |
| Fil     | a |                  | Only two data     |                   |
| tered** | s |                  | points on BQS     |                   |
| ](http: | t |                  | charts since mid  |                   |
| //bqs.u | i |                  | May.**            |                   |
| sgs.gov | l |                  |                   |                   |
| /bsp/QA | l |                  |                   |                   |
| DATA_al | e |                  |                   |                   |
| l/05JUN | x |                  |                   |                   |
| /JUN05N | h |                  |                   |                   |
| WQL0095 | i |                  |                   |                   |
| 0B.gif) | b |                  |                   |                   |
| **\     | i |                  |                   |                   |
| ISE     | t |                  |                   |                   |
| labcode | a |                  |                   |                   |
| 0031    | n |                  |                   |                   |
| p       | o |                  |                   |                   |
| armcode | v |                  |                   |                   |
| 0950B** | e |                  |                   |                   |
|         | r |                  |                   |                   |
|         | a |                  |                   |                   |
|         | l |                  |                   |                   |
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|         | a |                  |                   |                   |
|         | n |                  |                   |                   |
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|         | t |                  |                   |                   |
|         | a |                  |                   |                   |
|         | r |                  |                   |                   |
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|         | e |                  |                   |                   |
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|         | a |                  |                   |                   |
|         | l |                  |                   |                   |
|         | u |                  |                   |                   |
|         | e |                  |                   |                   |
|         | . |                  |                   |                   |
|         | * |                  |                   |                   |
|         | * |                  |                   |                   |
+---------+---+------------------+-------------------+-------------------+
| *P      |   |                  |                   |                   |
| revious |   |                  |                   |                   |
| c       |   |                  |                   |                   |
| omments |   |                  |                   |                   |
| for     |   |                  |                   |                   |
| fl      |   |                  |                   |                   |
| uoride, |   |                  |                   |                   |
| fi      |   |                  |                   |                   |
| ltered, |   |                  |                   |                   |
| ISE,    |   |                  |                   |                   |
| labcode |   |                  |                   |                   |
| 0031,   |   |                  |                   |                   |
| p       |   |                  |                   |                   |
| armcode |   |                  |                   |                   |
| 0950B*  |   |                  |                   |                   |
+---------+---+------------------+-------------------+-------------------+
| From    | D |                  | The NWQL agrees   | We are ordering   |
|         | a |                  | with the          | new stock         |
| >       | t |                  | observation.      | standards and     |
|  QADATA | a |                  |                   | will prepare and  |
| >       | s |                  |                   | verify new        |
| Summary | i |                  |                   | working standards |
| > April | n |                  |                   | by April 29,      |
| > 2005  | c |                  |                   | 2005. We also     |
|         | e |                  |                   | ordered a new     |
|         | m |                  |                   | electrode to see  |
|         | i |                  |                   | if the current    |
|         | d |                  |                   | electrode is      |
|         | - |                  |                   | contributing to   |
|         | N |                  |                   | the bias.         |
|         | o |                  |                   |                   |
|         | v |                  |                   |                   |
|         | e |                  |                   |                   |
|         | m |                  |                   |                   |
|         | b |                  |                   |                   |
|         | e |                  |                   |                   |
|         | r |                  |                   |                   |
|         | 2 |                  |                   |                   |
|         | 0 |                  |                   |                   |
|         | 0 |                  |                   |                   |
|         | 4 |                  |                   |                   |
|         | a |                  |                   |                   |
|         | r |                  |                   |                   |
|         | e |                  |                   |                   |
|         | b |                  |                   |                   |
|         | i |                  |                   |                   |
|         | a |                  |                   |                   |
|         | s |                  |                   |                   |
|         | e |                  |                   |                   |
|         | d |                  |                   |                   |
|         | h |                  |                   |                   |
|         | i |                  |                   |                   |
|         | g |                  |                   |                   |
|         | h |                  |                   |                   |
|         | b |                  |                   |                   |
|         | y |                  |                   |                   |
|         | 6 |                  |                   |                   |
|         | . |                  |                   |                   |
|         | 2 |                  |                   |                   |
|         | % |                  |                   |                   |
|         | . |                  |                   |                   |
|         | F |                  |                   |                   |
|         | o |                  |                   |                   |
|         | r |                  |                   |                   |
|         | t |                  |                   |                   |
|         | y |                  |                   |                   |
|         | - |                  |                   |                   |
|         | t |                  |                   |                   |
|         | h |                  |                   |                   |
|         | r |                  |                   |                   |
|         | e |                  |                   |                   |
|         | e |                  |                   |                   |
|         | o |                  |                   |                   |
|         | u |                  |                   |                   |
|         | t |                  |                   |                   |
|         | o |                  |                   |                   |
|         | f |                  |                   |                   |
|         | t |                  |                   |                   |
|         | h |                  |                   |                   |
|         | e |                  |                   |                   |
|         | l |                  |                   |                   |
|         | a |                  |                   |                   |
|         | s |                  |                   |                   |
|         | t |                  |                   |                   |
|         | 4 |                  |                   |                   |
|         | 4 |                  |                   |                   |
|         | r |                  |                   |                   |
|         | e |                  |                   |                   |
|         | s |                  |                   |                   |
|         | u |                  |                   |                   |
|         | l |                  |                   |                   |
|         | t |                  |                   |                   |
|         | s |                  |                   |                   |
|         | a |                  |                   |                   |
|         | r |                  |                   |                   |
|         | e |                  |                   |                   |
|         | g |                  |                   |                   |
|         | r |                  |                   |                   |
|         | e |                  |                   |                   |
|         | a |                  |                   |                   |
|         | t |                  |                   |                   |
|         | e |                  |                   |                   |
|         | r |                  |                   |                   |
|         | t |                  |                   |                   |
|         | h |                  |                   |                   |
|         | a |                  |                   |                   |
|         | n |                  |                   |                   |
|         | t |                  |                   |                   |
|         | h |                  |                   |                   |
|         | e |                  |                   |                   |
|         | t |                  |                   |                   |
|         | a |                  |                   |                   |
|         | r |                  |                   |                   |
|         | g |                  |                   |                   |
|         | e |                  |                   |                   |
|         | t |                  |                   |                   |
|         | v |                  |                   |                   |
|         | a |                  |                   |                   |
|         | l |                  |                   |                   |
|         | u |                  |                   |                   |
|         | e |                  |                   |                   |
|         | . |                  |                   |                   |
+---------+---+------------------+-------------------+-------------------+
|         |   |                  |                   |                   |
+---------+---+------------------+-------------------+-------------------+

######