##### QADATA Summary -- September 2003

The Inorganic Blind Sample Project (IBSP) reviews 95 inorganic
analytical lines at the National Water Quality Laboratory (NWQL) and 84
inorganic analytical lines at the Ocala Water Quality and Research
Laboratory (OWQRL) using double-blind, quality-assurance samples. The
QADATA Summary is a short summary of only those analytical lines for
which the quality-assurance charts indicate or have indicated a bias
and/or higher than expected variability. Overall, the vast majority of
the analyses at the NWQL and OWQRL demonstrate acceptable variability
and little or no bias.

The data reviewed is for the time period 02/01/03 through 08/20/03;
however, longer-range charts are shown when they add clarity to the
problem. The attached quality-assurance charts contain data from samples
that have been subject to the same laboratory handling procedures as the
samples that are submitted by the USGS district offices, and the data
have the same level of quality control-review as the data released to
the districts. Thus, any factors that affect the districts' data should
also affect the data shown in the IBSP quality-assurance charts. Samples
for which the results are outside of control limits\
(+/-2 f-pseudosigma) are reanalyzed, but the values are not updated.
Data from samples that are known to have deteriorated or are known to
have been affected by a problem at IBSP are not displayed on the charts.

In this report, the "Problem" is determined and written by IBSP. The
"Problem" is then sent to the laboratories that then get two weeks to
respond to the issue by writing a "Lab Comment" and a "Corrective
Action." The labs' comments are incorporated into the QADATA Summary as
received. Comments from previous QADATA Summaries are included in this
report when they help provide a clearer perspective of the overall
concern.

Charts containing all data received as of 09/05/03 may be accessed at
<http://bqs.usgs.gov/bsp/WY03charts.htm>. Lab personnel and customers
can also make their own QADATA retrieval to parallel their project's
sampling period by using the QADATA Application online at
<http://bqs.usgs.gov/bsp/mainpage.html> (select QADATA Application
button). Charts pertaining specifically to this report can be accessed
electronically by following the blue, underlined hyperlinks embedded
within the report and associated with each analysis discussed.

*Tedmund M. Struzeski*

<struzesk@usgs.gov>

Table of Contents

Note: All analytes are hyperlinked to their respective positions within
the report.

NWQL

Analyte Page

Orthophosphate, Filtered, Colorimetric, Labcode 1974, Parmcode 0671H . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . 3

Barium, Whole-Water Recoverable, ICP, Labcode 2352, Parmcode 1007C . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . 4

Cadmium, Whole-Water Recoverable, GFAA, Labcode 1555, Parmcode 1027F . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . 5

Lead, Filtered, GFAA, Labcode 1560, Parmcode 1049F . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . 6

Lead, Whole-Water Recoverable, GFAA, Labcode 1561, Parmcode 1051F . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . 6

Alkalinity, Filtered, Titrimetric, Labcode 2109, Parmcode 29801A . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . 7

Alkalinity, Whole-Water Recoverable , Titrimetric, Labcode 0070,
Parmcode 90410A . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . 7

**OWQRL**

Analyte

Phosphorus, Filtered, Colorimetric, Labcode 1983, Parmcode 0666D . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . 8

**Arsenic, Whole-Water Recoverable,** GFAA, Labcode 3119, Parmcode
1002(1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . 9

Table 1

NWQL PERFORMANCE ON IBSP SAMPLES

######### **Note: Click the blue, underlined text in the left column to access the control chart for the associated parameter.**

+----------+---+-----------------+--------------------+--------------------+
| **       |   | **Problem**     | **NWQL**           | **Corrective**     |
| Nutrient |   |                 |                    |                    |
| Determin |   |                 | **Lab Comment**    | **Action**         |
| ations** |   |                 |                    |                    |
+==========+===+=================+====================+====================+
| [Orthoph |   | **Results for   | **A new vial of    | **The Nutrients    |
| osphate, |   | NS10 are still  | the NIST certified | Unit will continue |
| F        |   | demonstrating a | reference sample   | to monitor IBSP    |
| iltered] |   | negative bias   | purchased by the   | control charts and |
| (http:// |   | with about      | NWQL was opened    | will analyze the   |
| bqs.usgs |   | one-half of the | and a sample at a  | new QC samples as  |
| .gov/bsp |   | NS10 data       | concentration      | well as on-line    |
| /QADATA_ |   | outside of\     | similar to NS10    | NIST QC samples.   |
| all/SEP0 |   | -2              | was prepared and   | We will continue   |
| 3NWQL006 |   | f-pseudosigma.  | analyzed. Values   | to look for other  |
| 71H.gif) |   | The OWQRL is    | were slightly      | causes for the low |
|          |   | not             | higher than the    | bias for NS10.**   |
| **Colo   |   | demonstrating a | calculated mean    |                    |
| rimetric |   | negative bias   | value. Samples     |                    |
| labcode  |   | of this         | made at three      |                    |
| 1974     |   | magnitude and   | concentrations     |                    |
| parmcode |   | has no data     | from a new         |                    |
| 0671H**  |   | outside of\     | commercially       |                    |
|          |   | -2              | prepared certified |                    |
|          |   | f               | reference material |                    |
|          |   | -pseudosigma.** | were also          |                    |
|          |   |                 | analyzed. The      |                    |
|          |   |                 | values for these   |                    |
|          |   |                 | samples were close |                    |
|          |   |                 | to but slightly    |                    |
|          |   |                 | lower than the     |                    |
|          |   |                 | calculated mean.** |                    |
+----------+---+-----------------+--------------------+--------------------+
| *        |   |                 |                    |                    |
| Previous |   |                 |                    |                    |
| comments |   |                 |                    |                    |
| for      |   |                 |                    |                    |
| orthoph  |   |                 |                    |                    |
| osphate, |   |                 |                    |                    |
| f        |   |                 |                    |                    |
| iltered, |   |                 |                    |                    |
| labcode  |   |                 |                    |                    |
| 1974,    |   |                 |                    |                    |
| parmcode |   |                 |                    |                    |
| 0671H*   |   |                 |                    |                    |
+----------+---+-----------------+--------------------+--------------------+
| From     | O |                 | Values for N77 and | The Nutrients Unit |
|          | v |                 | N78 are            | will continue to   |
| > QADATA | e |                 | distributed        | run NIST samples   |
| >        | r |                 | closely around the | and monitor the    |
|  Summary | t |                 | median. QC samples | IBSP charts.       |
| > July   | h |                 | prepared from the  |                    |
| > 2003   | e |                 | NIST certified PO4 |                    |
|          | l |                 | reference material |                    |
|          | a |                 | purchased by the   |                    |
|          | s |                 | NWQL also run      |                    |
|          | t |                 | close to their     |                    |
|          | t |                 | certified value.   |                    |
|          | w |                 |                    |                    |
|          | o |                 |                    |                    |
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+----------+---+-----------------+--------------------+--------------------+
| From     |   | N76 has been    | The NIST certified | The Nutrients Unit |
|          |   | replaced by a   | reference sample   | will continue to   |
| > QADATA |   | new matrix      | purchased by the   | analyze NIST       |
| >        |   | (N78) which now | NWQL was prepared  | samples in         |
|  Summary |   | indicates that  | at concentrations  | addition to the    |
| > May    |   | this line has   | close to the PO4   | on-line QC         |
| > 2003   |   | improved        | concentration in   | samples. The       |
|          |   | variability.    | N75, N76 and NS10. | results from these |
|          |   | However, for    | The NIST sample    | samples and the    |
|          |   | the past two    | near the NS10      | IBSP results will  |
|          |   | months, about   | level ran slightly | continue to be     |
|          |   | 50% of the\     | high on average    | monitored.         |
|          |   | data for NS10   | and the NIST       |                    |
|          |   | are outside of\ | sample near the    |                    |
|          |   | -2              | N75 level gave     |                    |
|          |   | f-pseudosigma,  | results that       |                    |
|          |   | whereas for the | averaged close to  |                    |
|          |   | OWQRL no data   | the certified      |                    |
|          |   | for NS10 are    | value. Results for |                    |
|          |   | outside of 2    | the NIST sample    |                    |
|          |   | f-pseudosigma.  | near the N-76      |                    |
|          |   |                 | concentration      |                    |
|          |   |                 | indicate a higher  |                    |
|          |   |                 | than expected      |                    |
|          |   |                 | concentration. All |                    |
|          |   |                 | NIST samples were  |                    |
|          |   |                 | cross-checked on   |                    |
|          |   |                 | the low-level      |                    |
|          |   |                 | ortho-P line with  |                    |
|          |   |                 | results that were  |                    |
|          |   |                 | close to the       |                    |
|          |   |                 | regular line       |                    |
|          |   |                 | values.            |                    |
+----------+---+-----------------+--------------------+--------------------+
|          |   |                 |                    |                    |
+----------+---+-----------------+--------------------+--------------------+

+---------+---+------------------+-------------------+-------------------+
| **Trace | * |                  | **NWQL**          | **Corrective**    |
| Metal   | * |                  |                   |                   |
| De      | P |                  | **Lab Comment**   | **Action**        |
| termina | r |                  |                   |                   |
| tions** | o |                  |                   |                   |
|         | b |                  |                   |                   |
|         | l |                  |                   |                   |
|         | e |                  |                   |                   |
|         | m |                  |                   |                   |
|         | * |                  |                   |                   |
|         | * |                  |                   |                   |
+=========+===+==================+===================+===================+
| [**     | * |                  | **New ICP         | **The NWQL will   |
| Barium, | * |                  | instrumentation   | continue to       |
| Whol    | T |                  | went online       | monitor WWR       |
| e-Water | h |                  | beginning in      | barium QC on the  |
| Recover | e |                  | August. There is  | new instruments   |
| able**] | n |                  | no IBSP data      | to determine if a |
| (http:/ | e |                  | provided from     | bias continues.** |
| /bqs.us | g |                  | this time to      |                   |
| gs.gov/ | a |                  | date. Online QC   |                   |
| bsp/QAD | t |                  | data for these    |                   |
| ATA_all | i |                  | new instruments   |                   |
| /SEP03N | v |                  | indicate no       |                   |
| WQL0100 | e |                  | appreciable bias  |                   |
| 7C.gif) | b |                  | at these          |                   |
| **ICP** | i |                  | concentrations. A |                   |
|         | a |                  | Rapi-Note and an  |                   |
| **      | s |                  | NWQL Technical    |                   |
| labcode | ( |                  | Memorandum will   |                   |
| 2352**  | - |                  | be issued in the  |                   |
|         | 5 |                  | near future       |                   |
| **p     | . |                  | detailing the use |                   |
| armcode | 2 |                  | of the new ICPs   |                   |
| 1007C** | % |                  | for Whole-Water   |                   |
|         | f |                  | Recoverable       |                   |
|         | o |                  | analyses.**       |                   |
|         | r |                  |                   |                   |
|         | W |                  |                   |                   |
|         | Y |                  |                   |                   |
|         | 0 |                  |                   |                   |
|         | 3 |                  |                   |                   |
|         | ) |                  |                   |                   |
|         | h |                  |                   |                   |
|         | a |                  |                   |                   |
|         | s |                  |                   |                   |
|         | s |                  |                   |                   |
|         | t |                  |                   |                   |
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|         | l |                  |                   |                   |
|         | n |                  |                   |                   |
|         | o |                  |                   |                   |
|         | t |                  |                   |                   |
|         | i |                  |                   |                   |
|         | m |                  |                   |                   |
|         | p |                  |                   |                   |
|         | r |                  |                   |                   |
|         | o |                  |                   |                   |
|         | v |                  |                   |                   |
|         | e |                  |                   |                   |
|         | d |                  |                   |                   |
|         | . |                  |                   |                   |
|         | * |                  |                   |                   |
|         | * |                  |                   |                   |
+---------+---+------------------+-------------------+-------------------+
| *P      |   |                  |                   |                   |
| revious |   |                  |                   |                   |
| c       |   |                  |                   |                   |
| omments |   |                  |                   |                   |
| for     |   |                  |                   |                   |
| barium, |   |                  |                   |                   |
| whol    |   |                  |                   |                   |
| e-water |   |                  |                   |                   |
| recov   |   |                  |                   |                   |
| erable, |   |                  |                   |                   |
| ICP,    |   |                  |                   |                   |
| labcode |   |                  |                   |                   |
| 2352,   |   |                  |                   |                   |
| p       |   |                  |                   |                   |
| armcode |   |                  |                   |                   |
| 1007C*  |   |                  |                   |                   |
+---------+---+------------------+-------------------+-------------------+
| From    | T |                  | The NWQL agrees   | The NWQL will     |
|         | h |                  | with IBSP that    | continue to       |
| >       | e |                  | the barium bias   | monitor the       |
|  QADATA | h |                  | is getting worse. | barium WWR line   |
| >       | i |                  | New ICP           | on the different  |
| Summary | s |                  | instrumentation   | instrument to see |
| > July  | t |                  | has come online   | if there is an    |
| > 2003  | o |                  | for the dissolved | improvement. The  |
|         | r |                  | line.             | ICP WWR method    |
|         | i |                  |                   | has been moved to |
|         | c |                  |                   | a different       |
|         | a |                  |                   | instrument that   |
|         | l |                  |                   | has had recent    |
|         | n |                  |                   | maintenance. We   |
|         | e |                  |                   | will reanalyze    |
|         | g |                  |                   | IBSP samples on   |
|         | a |                  |                   | this              |
|         | t |                  |                   | instrumentation.  |
|         | i |                  |                   | We plan to have   |
|         | v |                  |                   | the new Perkin    |
|         | e |                  |                   | Elmer ICP         |
|         | b |                  |                   | instrumentation   |
|         | i |                  |                   | online this       |
|         | a |                  |                   | summer.           |
|         | s |                  |                   |                   |
|         | h |                  |                   |                   |
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|         | a |                  |                   |                   |
|         | n |                  |                   |                   |
|         | a |                  |                   |                   |
|         | l |                  |                   |                   |
|         | y |                  |                   |                   |
|         | z |                  |                   |                   |
|         | e |                  |                   |                   |
|         | d |                  |                   |                   |
|         | u |                  |                   |                   |
|         | s |                  |                   |                   |
|         | i |                  |                   |                   |
|         | n |                  |                   |                   |
|         | g |                  |                   |                   |
|         | o |                  |                   |                   |
|         | n |                  |                   |                   |
|         | e |                  |                   |                   |
|         | o |                  |                   |                   |
|         | f |                  |                   |                   |
|         | t |                  |                   |                   |
|         | h |                  |                   |                   |
|         | e |                  |                   |                   |
|         | n |                  |                   |                   |
|         | e |                  |                   |                   |
|         | w |                  |                   |                   |
|         | I |                  |                   |                   |
|         | C |                  |                   |                   |
|         | P |                  |                   |                   |
|         | s |                  |                   |                   |
|         | a |                  |                   |                   |
|         | n |                  |                   |                   |
|         | d |                  |                   |                   |
|         | t |                  |                   |                   |
|         | h |                  |                   |                   |
|         | e |                  |                   |                   |
|         | n |                  |                   |                   |
|         | t |                  |                   |                   |
|         | h |                  |                   |                   |
|         | e |                  |                   |                   |
|         | d |                  |                   |                   |
|         | a |                  |                   |                   |
|         | t |                  |                   |                   |
|         | a |                  |                   |                   |
|         | c |                  |                   |                   |
|         | o |                  |                   |                   |
|         | m |                  |                   |                   |
|         | p |                  |                   |                   |
|         | a |                  |                   |                   |
|         | r |                  |                   |                   |
|         | e |                  |                   |                   |
|         | d |                  |                   |                   |
|         | . |                  |                   |                   |
+---------+---+------------------+-------------------+-------------------+
| From    | T |                  | Online QC charts  | The NWQL will     |
|         | h |                  | show that the     | reanalyze samples |
| >       | e |                  | negative bias     | on the new ICPs   |
|  QADATA | h |                  | increased         | to compare the    |
| >       | i |                  | significantly     | data, once we     |
| Summary | s |                  | during mid-March. | have assessed the |
| > May   | t |                  | Several           | WWR prove-out     |
| > 2003  | o |                  | troubleshooting   | data for the new  |
|         | r |                  | measures were     | instruments. We   |
|         | i |                  | checked on the    | will continue to  |
|         | c |                  | instrument        | monitor online QC |
|         | a |                  | including: plasma | charts to see if  |
|         | l |                  | power, pump       | the negative bias |
|         | n |                  | efficiency,       | has improved as a |
|         | e |                  | cleaning of       | result of the     |
|         | g |                  | nebulizer and     | optical path      |
|         | a |                  | spray chamber,    | adjustment.       |
|         | t |                  | dark current      |                   |
|         | i |                  | test, all of      |                   |
|         | v |                  | which showed no   |                   |
|         | e |                  | indication of a   |                   |
|         | b |                  | problem. The only |                   |
|         | i |                  | test that showed  |                   |
|         | a |                  | a significant     |                   |
|         | s |                  | problem was that  |                   |
|         | p |                  | the Purged        |                   |
|         | e |                  | Optical Path,     |                   |
|         | r |                  | which needed      |                   |
|         | s |                  | adjusting.        |                   |
|         | i |                  |                   |                   |
|         | s |                  |                   |                   |
|         | t |                  |                   |                   |
|         | s |                  |                   |                   |
|         | . |                  |                   |                   |
|         | I |                  |                   |                   |
|         | t |                  |                   |                   |
|         | i |                  |                   |                   |
|         | s |                  |                   |                   |
|         | r |                  |                   |                   |
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|         | c |                  |                   |                   |
|         | o |                  |                   |                   |
|         | m |                  |                   |                   |
|         | m |                  |                   |                   |
|         | e |                  |                   |                   |
|         | n |                  |                   |                   |
|         | d |                  |                   |                   |
|         | e |                  |                   |                   |
|         | d |                  |                   |                   |
|         | t |                  |                   |                   |
|         | h |                  |                   |                   |
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|         | t |                  |                   |                   |
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|         | s |                  |                   |                   |
|         | a |                  |                   |                   |
|         | m |                  |                   |                   |
|         | p |                  |                   |                   |
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|         | s |                  |                   |                   |
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|         | a |                  |                   |                   |
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|         | l |                  |                   |                   |
|         | y |                  |                   |                   |
|         | z |                  |                   |                   |
|         | e |                  |                   |                   |
|         | d |                  |                   |                   |
|         | u |                  |                   |                   |
|         | s |                  |                   |                   |
|         | i |                  |                   |                   |
|         | n |                  |                   |                   |
|         | g |                  |                   |                   |
|         | o |                  |                   |                   |
|         | n |                  |                   |                   |
|         | e |                  |                   |                   |
|         | o |                  |                   |                   |
|         | f |                  |                   |                   |
|         | t |                  |                   |                   |
|         | h |                  |                   |                   |
|         | e |                  |                   |                   |
|         | n |                  |                   |                   |
|         | e |                  |                   |                   |
|         | w |                  |                   |                   |
|         | I |                  |                   |                   |
|         | C |                  |                   |                   |
|         | P |                  |                   |                   |
|         | s |                  |                   |                   |
|         | a |                  |                   |                   |
|         | n |                  |                   |                   |
|         | d |                  |                   |                   |
|         | t |                  |                   |                   |
|         | h |                  |                   |                   |
|         | e |                  |                   |                   |
|         | n |                  |                   |                   |
|         | t |                  |                   |                   |
|         | h |                  |                   |                   |
|         | e |                  |                   |                   |
|         | d |                  |                   |                   |
|         | a |                  |                   |                   |
|         | t |                  |                   |                   |
|         | a |                  |                   |                   |
|         | c |                  |                   |                   |
|         | o |                  |                   |                   |
|         | m |                  |                   |                   |
|         | p |                  |                   |                   |
|         | a |                  |                   |                   |
|         | r |                  |                   |                   |
|         | e |                  |                   |                   |
|         | d |                  |                   |                   |
|         | . |                  |                   |                   |
+---------+---+------------------+-------------------+-------------------+
| From    | A |                  | New standards     | The NWQL will     |
|         | l |                  | were prepared and | continue to       |
| >       | t |                  | verified by       | monitor. More     |
|  QADATA | h |                  | ICPMS. New        | data from the     |
| >       | o |                  | standards were    | IBSP since these  |
| Summary | u |                  | accepted.         | actions were      |
| > March | g |                  |                   | implemented will  |
| > 2003  | h |                  |                   | be examined in    |
|         | t |                  |                   | order to better   |
|         | h |                  |                   | assess if the     |
|         | e |                  |                   | bias is           |
|         | r |                  |                   | improving.        |
|         | e |                  |                   |                   |
|         | a |                  |                   |                   |
|         | r |                  |                   |                   |
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|         | t |                  |                   |                   |
|         | w |                  |                   |                   |
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|         | p |                  |                   |                   |
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|         | n |                  |                   |                   |
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|         | s |                  |                   |                   |
|         | a |                  |                   |                   |
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|         | v |                  |                   |                   |
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|         | d |                  |                   |                   |
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|         | d |                  |                   |                   |
|         | e |                  |                   |                   |
|         | t |                  |                   |                   |
|         | e |                  |                   |                   |
|         | r |                  |                   |                   |
|         | m |                  |                   |                   |
|         | i |                  |                   |                   |
|         | n |                  |                   |                   |
|         | e |                  |                   |                   |
|         | t |                  |                   |                   |
|         | h |                  |                   |                   |
|         | e |                  |                   |                   |
|         | e |                  |                   |                   |
|         | f |                  |                   |                   |
|         | f |                  |                   |                   |
|         | e |                  |                   |                   |
|         | c |                  |                   |                   |
|         | t |                  |                   |                   |
|         | s |                  |                   |                   |
|         | o |                  |                   |                   |
|         | f |                  |                   |                   |
|         | t |                  |                   |                   |
|         | h |                  |                   |                   |
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|         | w |                  |                   |                   |
|         | s |                  |                   |                   |
|         | t |                  |                   |                   |
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|         | d |                  |                   |                   |
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|         | . |                  |                   |                   |
+---------+---+------------------+-------------------+-------------------+
| From    | T |                  | NWQL charts still | New standards     |
|         | h |                  | show a slight     | will be prepared  |
| >       | e |                  | negative bias.    | and checked the   |
|  QADATA | h |                  | The standards     | first week in     |
| >       | i |                  | approved in       | February, 2003.   |
| Summary | s |                  | August, 2002 were | They will be      |
| >       | t |                  | recently          | compared with the |
| January | o |                  | re-checked and    | old standards on  |
| > 2003  | r |                  | found to be       | the ICP as well   |
|         | i |                  | slightly outside  | as by ICPMS       |
|         | c |                  | acceptance limits | (alternate        |
|         | a |                  | on a new ICP      | method). SRS      |
|         | l |                  | instrument in     | performance will  |
|         | n |                  | development       | be evaluated      |
|         | e |                  | status.           | using the new     |
|         | g |                  |                   | standards. The    |
|         | a |                  |                   | OWQRL lab will be |
|         | t |                  |                   | called to compare |
|         | i |                  |                   | procedures as     |
|         | v |                  |                   | well.             |
|         | e |                  |                   |                   |
|         | b |                  |                   |                   |
|         | i |                  |                   |                   |
|         | a |                  |                   |                   |
|         | s |                  |                   |                   |
|         | p |                  |                   |                   |
|         | e |                  |                   |                   |
|         | r |                  |                   |                   |
|         | s |                  |                   |                   |
|         | i |                  |                   |                   |
|         | s |                  |                   |                   |
|         | t |                  |                   |                   |
|         | s |                  |                   |                   |
|         | . |                  |                   |                   |
+---------+---+------------------+-------------------+-------------------+
| From    | M |                  | Adjustments to    | Calibration       |
|         | a |                  | past descriptions | standards were    |
| >       | g |                  | of bias from IBSP | made and accepted |
|  QADATA | n |                  | have been to      | on August 20,     |
| >       | i |                  | digest the        | 2002. Standards   |
| Summary | t |                  | calibration       | will be           |
| > Se    | u |                  | standards and QC  | cross-checked by  |
| ptember | d |                  | to match the      | a different       |
| > 2002  | e |                  | digestion process | method. Using lab |
|         | o |                  | of the samples.   | QC data and IBSP, |
|         | f |                  |                   | we will continue  |
|         | h |                  |                   | to monitor and,   |
|         | i |                  |                   | additionally,     |
|         | s |                  |                   | obtain more       |
|         | t |                  |                   | current SRWS from |
|         | o |                  |                   | BQS for internal  |
|         | r |                  |                   | lab QC.           |
|         | i |                  |                   |                   |
|         | c |                  |                   |                   |
|         | a |                  |                   |                   |
|         | l |                  |                   |                   |
|         | n |                  |                   |                   |
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|         | v |                  |                   |                   |
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|         | s |                  |                   |                   |
|         | d |                  |                   |                   |
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|         | a |                  |                   |                   |
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|         | d |                  |                   |                   |
|         | a |                  |                   |                   |
|         | l |                  |                   |                   |
|         | t |                  |                   |                   |
|         | h |                  |                   |                   |
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|         | . |                  |                   |                   |
+---------+---+------------------+-------------------+-------------------+
|         |   |                  |                   |                   |
+---------+---+------------------+-------------------+-------------------+
| [**C    | * |                  | **Began using new | **Improvement is  |
| admium, | * |                  | standards July 9, | noted since       |
| Whol    | T |                  | 2003. On line QC  | standards were    |
| e-Water | h |                  | charts prior to   | made. NWQL will   |
| Recover | e |                  | July 9 show some  | continue to       |
| able**] | r |                  | bias, but bias    | monitor data      |
| (http:/ | e |                  | has decreased     | quality.**        |
| /bqs.us | s |                  | since new         |                   |
| gs.gov/ | u |                  | standards were    |                   |
| bsp/QAD | l |                  | made.**           |                   |
| ATA_all | t |                  |                   |                   |
| /SEP03N | s |                  |                   |                   |
| WQL0102 | f |                  |                   |                   |
| 7F.gif) | o |                  |                   |                   |
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|         | * |                  |                   |                   |
|         | * |                  |                   |                   |
+---------+---+------------------+-------------------+-------------------+
| *P      |   |                  |                   |                   |
| revious |   |                  |                   |                   |
| c       |   |                  |                   |                   |
| omments |   |                  |                   |                   |
| for     |   |                  |                   |                   |
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| whol    |   |                  |                   |                   |
| e-water |   |                  |                   |                   |
| recov   |   |                  |                   |                   |
| erable, |   |                  |                   |                   |
| GFAA,   |   |                  |                   |                   |
| labcode |   |                  |                   |                   |
| 1555,   |   |                  |                   |                   |
| p       |   |                  |                   |                   |
| armcode |   |                  |                   |                   |
| 1027F*  |   |                  |                   |                   |
+---------+---+------------------+-------------------+-------------------+
| From    | A |                  | NWQL QC charts    | Instrument has    |
|         | s |                  | show variable but | recently been     |
| >       | o |                  | acceptable data.  | optimized, and    |
|  QADATA | f |                  |                   | the NWQL will     |
| >       | J |                  |                   | continue to       |
| Summary | a |                  |                   | monitor.          |
| > July  | n |                  |                   |                   |
| > 2003  | u |                  |                   |                   |
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+---------+---+------------------+-------------------+-------------------+
|         |   |                  |                   |                   |
+---------+---+------------------+-------------------+-------------------+
| [       | * |                  | **NWQL QC charts  | **NWQL will       |
| **Lead, | * |                  | also show         | continue to       |
| Filt    | T |                  | improvement in    | monitor line.**   |
| ered**] | h |                  | variability.**    |                   |
| (http:/ | e |                  |                   |                   |
| /bqs.us | f |                  |                   |                   |
| gs.gov/ | o |                  |                   |                   |
| bsp/QAD | u |                  |                   |                   |
| ATA_all | r |                  |                   |                   |
| /SEP03N | m |                  |                   |                   |
| WQL0104 | o |                  |                   |                   |
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+---------+---+------------------+-------------------+-------------------+
| *P      |   |                  |                   |                   |
| revious |   |                  |                   |                   |
| c       |   |                  |                   |                   |
| omments |   |                  |                   |                   |
| for     |   |                  |                   |                   |
| lead,   |   |                  |                   |                   |
| fi      |   |                  |                   |                   |
| ltered, |   |                  |                   |                   |
| GFAA,   |   |                  |                   |                   |
| labcode |   |                  |                   |                   |
| 1560,   |   |                  |                   |                   |
| p       |   |                  |                   |                   |
| armcode |   |                  |                   |                   |
| 1049F*  |   |                  |                   |                   |
+---------+---+------------------+-------------------+-------------------+
| From    | T |                  | Variable, but     | Instrument has    |
|         | h |                  | acceptable data   | recently been     |
| >       | e |                  | quality is also   | optimized and the |
|  QADATA | m |                  | noted on NWQL     | NWQL will monitor |
| >       | o |                  | charts.           | for improvement.  |
| Summary | s |                  |                   |                   |
| > July  | t |                  |                   |                   |
| > 2003  | r |                  |                   |                   |
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|         | . |                  |                   |                   |
+---------+---+------------------+-------------------+-------------------+
| From    | V |                  | Change in         | NWQL will         |
|         | a |                  | variability not   | continue to       |
| >       | r |                  | noticeable on     | monitor.          |
|  QADATA | i |                  | NWQL charts.      |                   |
| >       | a |                  |                   |                   |
| Summary | b |                  |                   |                   |
| > May   | i |                  |                   |                   |
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|         | n |                  |                   |                   |
|         | e |                  |                   |                   |
|         | x |                  |                   |                   |
|         | t |                  |                   |                   |
|         | Q |                  |                   |                   |
|         | A |                  |                   |                   |
|         | D |                  |                   |                   |
|         | A |                  |                   |                   |
|         | T |                  |                   |                   |
|         | A |                  |                   |                   |
|         | S |                  |                   |                   |
|         | u |                  |                   |                   |
|         | m |                  |                   |                   |
|         | m |                  |                   |                   |
|         | a |                  |                   |                   |
|         | r |                  |                   |                   |
|         | y |                  |                   |                   |
|         | i |                  |                   |                   |
|         | s |                  |                   |                   |
|         | d |                  |                   |                   |
|         | i |                  |                   |                   |
|         | s |                  |                   |                   |
|         | t |                  |                   |                   |
|         | r |                  |                   |                   |
|         | i |                  |                   |                   |
|         | b |                  |                   |                   |
|         | u |                  |                   |                   |
|         | t |                  |                   |                   |
|         | e |                  |                   |                   |
|         | d |                  |                   |                   |
|         | . |                  |                   |                   |
+---------+---+------------------+-------------------+-------------------+
|         |   |                  |                   |                   |
+---------+---+------------------+-------------------+-------------------+
| [       | * |                  | **NWQL QC charts  | **NWQL will       |
| **Lead, | * |                  | also show         | continue to       |
| Whol    | T |                  | improvement.**    | monitor line.**   |
| e-Water | h |                  |                   |                   |
| Recover | e |                  |                   |                   |
| able**] | t |                  |                   |                   |
| (http:/ | h |                  |                   |                   |
| /bqs.us | r |                  |                   |                   |
| gs.gov/ | e |                  |                   |                   |
| bsp/QAD | e |                  |                   |                   |
| ATA_all | m |                  |                   |                   |
| /SEP03N | o |                  |                   |                   |
| WQL0105 | s |                  |                   |                   |
| 1F.gif) | t |                  |                   |                   |
| **GFAA  | r |                  |                   |                   |
| labcode | e |                  |                   |                   |
| 1561    | c |                  |                   |                   |
| p       | e |                  |                   |                   |
| armcode | n |                  |                   |                   |
| 1051F** | t |                  |                   |                   |
|         | v |                  |                   |                   |
|         | a |                  |                   |                   |
|         | l |                  |                   |                   |
|         | u |                  |                   |                   |
|         | e |                  |                   |                   |
|         | s |                  |                   |                   |
|         | s |                  |                   |                   |
|         | u |                  |                   |                   |
|         | g |                  |                   |                   |
|         | g |                  |                   |                   |
|         | e |                  |                   |                   |
|         | s |                  |                   |                   |
|         | t |                  |                   |                   |
|         | t |                  |                   |                   |
|         | h |                  |                   |                   |
|         | a |                  |                   |                   |
|         | t |                  |                   |                   |
|         | t |                  |                   |                   |
|         | h |                  |                   |                   |
|         | e |                  |                   |                   |
|         | v |                  |                   |                   |
|         | a |                  |                   |                   |
|         | r |                  |                   |                   |
|         | i |                  |                   |                   |
|         | a |                  |                   |                   |
|         | b |                  |                   |                   |
|         | i |                  |                   |                   |
|         | l |                  |                   |                   |
|         | i |                  |                   |                   |
|         | t |                  |                   |                   |
|         | y |                  |                   |                   |
|         | h |                  |                   |                   |
|         | a |                  |                   |                   |
|         | s |                  |                   |                   |
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|         | v |                  |                   |                   |
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|         | d |                  |                   |                   |
|         | . |                  |                   |                   |
|         | * |                  |                   |                   |
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|         |   |                  |                   |                   |
|         | * |                  |                   |                   |
|         | * |                  |                   |                   |
|         | A |                  |                   |                   |
|         | n |                  |                   |                   |
|         | a |                  |                   |                   |
|         | l |                  |                   |                   |
|         | y |                  |                   |                   |
|         | s |                  |                   |                   |
|         | i |                  |                   |                   |
|         | s |                  |                   |                   |
|         | s |                  |                   |                   |
|         | h |                  |                   |                   |
|         | o |                  |                   |                   |
|         | u |                  |                   |                   |
|         | l |                  |                   |                   |
|         | d |                  |                   |                   |
|         | b |                  |                   |                   |
|         | e |                  |                   |                   |
|         | c |                  |                   |                   |
|         | l |                  |                   |                   |
|         | o |                  |                   |                   |
|         | s |                  |                   |                   |
|         | e |                  |                   |                   |
|         | l |                  |                   |                   |
|         | y |                  |                   |                   |
|         | m |                  |                   |                   |
|         | o |                  |                   |                   |
|         | n |                  |                   |                   |
|         | i |                  |                   |                   |
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|         | o |                  |                   |                   |
|         | r |                  |                   |                   |
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|         | d |                  |                   |                   |
|         | u |                  |                   |                   |
|         | n |                  |                   |                   |
|         | t |                  |                   |                   |
|         | i |                  |                   |                   |
|         | l |                  |                   |                   |
|         | t |                  |                   |                   |
|         | h |                  |                   |                   |
|         | e |                  |                   |                   |
|         | n |                  |                   |                   |
|         | e |                  |                   |                   |
|         | x |                  |                   |                   |
|         | t |                  |                   |                   |
|         | Q |                  |                   |                   |
|         | A |                  |                   |                   |
|         | D |                  |                   |                   |
|         | A |                  |                   |                   |
|         | T |                  |                   |                   |
|         | A |                  |                   |                   |
|         | S |                  |                   |                   |
|         | u |                  |                   |                   |
|         | m |                  |                   |                   |
|         | m |                  |                   |                   |
|         | a |                  |                   |                   |
|         | r |                  |                   |                   |
|         | y |                  |                   |                   |
|         | i |                  |                   |                   |
|         | s |                  |                   |                   |
|         | d |                  |                   |                   |
|         | i |                  |                   |                   |
|         | s |                  |                   |                   |
|         | t |                  |                   |                   |
|         | r |                  |                   |                   |
|         | i |                  |                   |                   |
|         | b |                  |                   |                   |
|         | u |                  |                   |                   |
|         | t |                  |                   |                   |
|         | e |                  |                   |                   |
|         | d |                  |                   |                   |
|         | . |                  |                   |                   |
|         | * |                  |                   |                   |
|         | * |                  |                   |                   |
+---------+---+------------------+-------------------+-------------------+
| *P      |   |                  |                   |                   |
| revious |   |                  |                   |                   |
| c       |   |                  |                   |                   |
| omments |   |                  |                   |                   |
| for     |   |                  |                   |                   |
| lead,   |   |                  |                   |                   |
| whol    |   |                  |                   |                   |
| e-water |   |                  |                   |                   |
| recov   |   |                  |                   |                   |
| erable, |   |                  |                   |                   |
| GFAA,   |   |                  |                   |                   |
| labcode |   |                  |                   |                   |
| 1561,   |   |                  |                   |                   |
| p       |   |                  |                   |                   |
| armcode |   |                  |                   |                   |
| 1051F*  |   |                  |                   |                   |
+---------+---+------------------+-------------------+-------------------+
| From    |   | The data         | Variable, but     | Instrument has    |
|         |   | indicate         | acceptable data   | recently been     |
| >       |   | increased        | quality is also   | optimized and the |
|  QADATA |   | variability and  | noted on NWQL     | NWQL will monitor |
| >       |   | positive bias    | charts.           | for improvement.  |
| Summary |   | starting March   |                   |                   |
| > July  |   | 2003.            |                   |                   |
| > 2003  |   |                  |                   |                   |
+---------+---+------------------+-------------------+-------------------+
|         |   |                  |                   |                   |
+---------+---+------------------+-------------------+-------------------+

+---------+---+------------------+-------------------+-------------------+
| **Major | * |                  | **NWQL**          | **Corrective**    |
| De      | * |                  |                   |                   |
| termina | P |                  | **Lab Comment**   | **Action**        |
| tions** | r |                  |                   |                   |
|         | o |                  |                   |                   |
|         | b |                  |                   |                   |
|         | l |                  |                   |                   |
|         | e |                  |                   |                   |
|         | m |                  |                   |                   |
|         | * |                  |                   |                   |
|         | * |                  |                   |                   |
+=========+===+==================+===================+===================+
| [**Alka | * |                  | **Irregular       | **Analysts have   |
| linity, | * |                  | spikes are due to | adjusted the      |
| Filt    | A |                  | instrument        | titration         |
| ered**] | c |                  | stirring          | dispenser arm to  |
| (http:/ | t |                  | variability. The  | allow for the     |
| /bqs.us | i |                  | titration         | proper stirring.  |
| gs.gov/ | o |                  | dispenser arm     | The arm           |
| bsp/QAD | n |                  | position varies   | adjustments are   |
| ATA_all | s |                  | slightly and can  | checked more      |
| /SEP03N | t |                  | cause variable    | frequently and    |
| WQL2980 | a |                  | stirring, which   | the analysts are  |
| 1A.gif) | k |                  | causes the        | watching for      |
| **Titr  | e |                  | samples to over   | slight over       |
| imetric | n |                  | titrate,          | titrations to     |
| labcode | i |                  | resulting in      | catch the arm     |
| 2109    | n |                  | spikes in the     | variations        |
| p       | M |                  | data. A slight    | sooner.**         |
| armcode | a |                  | bump to the arm   |                   |
| 2       | r |                  | can cause the     |                   |
| 9801A** | c |                  | stirring          |                   |
|         | h |                  | variability.**    |                   |
|         | a |                  |                   |                   |
|         | p |                  |                   |                   |
|         | p |                  |                   |                   |
|         | e |                  |                   |                   |
|         | a |                  |                   |                   |
|         | r |                  |                   |                   |
|         | t |                  |                   |                   |
|         | o |                  |                   |                   |
|         | h |                  |                   |                   |
|         | a |                  |                   |                   |
|         | v |                  |                   |                   |
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|         | r |                  |                   |                   |
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|         | c |                  |                   |                   |
|         | t |                  |                   |                   |
|         | e |                  |                   |                   |
|         | d |                  |                   |                   |
|         | t |                  |                   |                   |
|         | h |                  |                   |                   |
|         | e |                  |                   |                   |
|         | p |                  |                   |                   |
|         | r |                  |                   |                   |
|         | o |                  |                   |                   |
|         | b |                  |                   |                   |
|         | l |                  |                   |                   |
|         | e |                  |                   |                   |
|         | m |                  |                   |                   |
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|         | f |                  |                   |                   |
|         | l |                  |                   |                   |
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|         | F |                  |                   |                   |
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|         | t |                  |                   |                   |
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|         | s |                  |                   |                   |
|         | t |                  |                   |                   |
|         | i |                  |                   |                   |
|         | l |                  |                   |                   |
|         | l |                  |                   |                   |
|         | o |                  |                   |                   |
|         | c |                  |                   |                   |
|         | c |                  |                   |                   |
|         | u |                  |                   |                   |
|         | r |                  |                   |                   |
|         | r |                  |                   |                   |
|         | i |                  |                   |                   |
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|         | g |                  |                   |                   |
|         | . |                  |                   |                   |
|         | * |                  |                   |                   |
|         | * |                  |                   |                   |
+---------+---+------------------+-------------------+-------------------+
| *P      |   |                  |                   |                   |
| revious |   |                  |                   |                   |
| c       |   |                  |                   |                   |
| omments |   |                  |                   |                   |
| for     |   |                  |                   |                   |
| alka    |   |                  |                   |                   |
| linity, |   |                  |                   |                   |
| fi      |   |                  |                   |                   |
| ltered, |   |                  |                   |                   |
| titri   |   |                  |                   |                   |
| metric, |   |                  |                   |                   |
| labcode |   |                  |                   |                   |
| 2109,   |   |                  |                   |                   |
| p       |   |                  |                   |                   |
| armcode |   |                  |                   |                   |
| 29801A* |   |                  |                   |                   |
+---------+---+------------------+-------------------+-------------------+
| From    | T |                  | In late February  | We have remade    |
|         | h |                  | and early March   | and moved the     |
| >       | e |                  | we determined     | titrant away from |
|  QADATA | d |                  | that there was a  | the steam vent    |
| >       | a |                  | problem with the  | and the problem   |
| Summary | t |                  | alkalinity line.  | has been          |
| > May   | a |                  | We were getting   | corrected. We are |
| > 2003  | i |                  | high values for   | continuing to     |
|         | n |                  | some samples;     | closely monitor   |
|         | d |                  | however, this was | the on-line QC    |
|         | i |                  | not immediately   | and the BQS       |
|         | c |                  | shown in the      | charts.           |
|         | a |                  | on-line QC. Upon  |                   |
|         | t |                  | investigation, we |                   |
|         | e |                  | determined that   |                   |
|         | a |                  | the titrant was   |                   |
|         | s |                  | not remaining     |                   |
|         | e |                  | stable due to an  |                   |
|         | v |                  | autoclave steam   |                   |
|         | e |                  | vent that had     |                   |
|         | r |                  | been moved next   |                   |
|         | e |                  | to the titrant    |                   |
|         | p |                  | storage area.     |                   |
|         | r |                  |                   |                   |
|         | o |                  |                   |                   |
|         | b |                  |                   |                   |
|         | l |                  |                   |                   |
|         | e |                  |                   |                   |
|         | m |                  |                   |                   |
|         | s |                  |                   |                   |
|         | t |                  |                   |                   |
|         | a |                  |                   |                   |
|         | r |                  |                   |                   |
|         | t |                  |                   |                   |
|         | i |                  |                   |                   |
|         | n |                  |                   |                   |
|         | g |                  |                   |                   |
|         | l |                  |                   |                   |
|         | a |                  |                   |                   |
|         | t |                  |                   |                   |
|         | e |                  |                   |                   |
|         | i |                  |                   |                   |
|         | n |                  |                   |                   |
|         | F |                  |                   |                   |
|         | e |                  |                   |                   |
|         | b |                  |                   |                   |
|         | r |                  |                   |                   |
|         | u |                  |                   |                   |
|         | a |                  |                   |                   |
|         | r |                  |                   |                   |
|         | y |                  |                   |                   |
|         | 2 |                  |                   |                   |
|         | 0 |                  |                   |                   |
|         | 0 |                  |                   |                   |
|         | 3 |                  |                   |                   |
|         | . |                  |                   |                   |
|         | M |                  |                   |                   |
|         | o |                  |                   |                   |
|         | s |                  |                   |                   |
|         | t |                  |                   |                   |
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|         | n |                  |                   |                   |
|         | t |                  |                   |                   |
|         | l |                  |                   |                   |
|         | y |                  |                   |                   |
|         | r |                  |                   |                   |
|         | e |                  |                   |                   |
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|         | a |                  |                   |                   |
|         | r |                  |                   |                   |
|         | c |                  |                   |                   |
|         | h |                  |                   |                   |
|         | ) |                  |                   |                   |
|         | s |                  |                   |                   |
|         | u |                  |                   |                   |
|         | g |                  |                   |                   |
|         | g |                  |                   |                   |
|         | e |                  |                   |                   |
|         | s |                  |                   |                   |
|         | t |                  |                   |                   |
|         | p |                  |                   |                   |
|         | r |                  |                   |                   |
|         | o |                  |                   |                   |
|         | b |                  |                   |                   |
|         | l |                  |                   |                   |
|         | e |                  |                   |                   |
|         | m |                  |                   |                   |
|         | h |                  |                   |                   |
|         | a |                  |                   |                   |
|         | s |                  |                   |                   |
|         | b |                  |                   |                   |
|         | e |                  |                   |                   |
|         | e |                  |                   |                   |
|         | n |                  |                   |                   |
|         | c |                  |                   |                   |
|         | o |                  |                   |                   |
|         | r |                  |                   |                   |
|         | r |                  |                   |                   |
|         | e |                  |                   |                   |
|         | c |                  |                   |                   |
|         | t |                  |                   |                   |
|         | e |                  |                   |                   |
|         | d |                  |                   |                   |
|         | . |                  |                   |                   |
+---------+---+------------------+-------------------+-------------------+
|         |   |                  |                   |                   |
+---------+---+------------------+-------------------+-------------------+
| [**Alka | * |                  | **Irregular       | **Analysts have   |
| linity, | * |                  | spikes are due to | adjusted the      |
| Whol    | S |                  | instrument        | titration         |
| e-Water | e |                  | stirring          | dispenser arm to  |
| Recover | e |                  | variability. The  | allow for the     |
| able**] | a |                  | titration         | proper stirring.  |
| (http:/ | b |                  | dispenser arm     | The arm           |
| /bqs.us | o |                  | position varies   | adjustments are   |
| gs.gov/ | v |                  | slightly and can  | checked more      |
| bsp/QAD | e |                  | cause variable    | frequently and    |
| ATA_all | ( |                  | stirring, which   | the analysts are  |
| /SEP03N | l |                  | causes the        | watching for      |
| WQL9041 | a |                  | samples to over   | slight over       |
| 0A.gif) | b |                  | titrate,          | titrations to     |
| **Titr  | c |                  | resulting in      | catch the arm     |
| imetric | o |                  | spikes in the     | variations        |
| labcode | d |                  | data. A slight    | sooner.**         |
| 0070    | e |                  | bump to the arm   |                   |
| p       | 2 |                  | can cause the     |                   |
| armcode | 1 |                  | stirring          |                   |
| 9       | 0 |                  | variability.**    |                   |
| 0410A** | 9 |                  |                   |                   |
|         | ) |                  |                   |                   |
|         | * |                  |                   |                   |
|         | * |                  |                   |                   |
+---------+---+------------------+-------------------+-------------------+
| *P      |   |                  |                   |                   |
| revious |   |                  |                   |                   |
| c       |   |                  |                   |                   |
| omments |   |                  |                   |                   |
| for     |   |                  |                   |                   |
| alka    |   |                  |                   |                   |
| linity, |   |                  |                   |                   |
| whol    |   |                  |                   |                   |
| e-water |   |                  |                   |                   |
| recov   |   |                  |                   |                   |
| erable, |   |                  |                   |                   |
| titri   |   |                  |                   |                   |
| metric, |   |                  |                   |                   |
| labcode |   |                  |                   |                   |
| 0070,   |   |                  |                   |                   |
| p       |   |                  |                   |                   |
| armcode |   |                  |                   |                   |
| 24101A* |   |                  |                   |                   |
+---------+---+------------------+-------------------+-------------------+
| From    | T |                  | In late February  | We have remade    |
|         | h |                  | and early March   | and moved the     |
| >       | e |                  | we determined     | titrant away from |
|  QADATA | d |                  | that there was a  | the steam vent    |
| >       | a |                  | problem with the  | and the problem   |
| Summary | t |                  | alkalinity line.  | has been          |
| > May   | a |                  | We were getting   | corrected. We are |
| > 2003  | i |                  | high values for   | continuing to     |
|         | n |                  | some samples;     | closely monitor   |
|         | d |                  | however, this was | the on-line QC    |
|         | i |                  | not immediately   | and the BQS       |
|         | c |                  | shown in the      | charts.           |
|         | a |                  | on-line QC. Upon  |                   |
|         | t |                  | investigation, we |                   |
|         | e |                  | determined that   |                   |
|         | a |                  | the titrant was   |                   |
|         | s |                  | not remaining     |                   |
|         | e |                  | stable due to an  |                   |
|         | v |                  | autoclave steam   |                   |
|         | e |                  | vent that had     |                   |
|         | r |                  | been moved next   |                   |
|         | e |                  | to the titrant    |                   |
|         | p |                  | storage area.     |                   |
|         | r |                  |                   |                   |
|         | o |                  |                   |                   |
|         | b |                  |                   |                   |
|         | l |                  |                   |                   |
|         | e |                  |                   |                   |
|         | m |                  |                   |                   |
|         | s |                  |                   |                   |
|         | t |                  |                   |                   |
|         | a |                  |                   |                   |
|         | r |                  |                   |                   |
|         | t |                  |                   |                   |
|         | i |                  |                   |                   |
|         | n |                  |                   |                   |
|         | g |                  |                   |                   |
|         | l |                  |                   |                   |
|         | a |                  |                   |                   |
|         | t |                  |                   |                   |
|         | e |                  |                   |                   |
|         | i |                  |                   |                   |
|         | n |                  |                   |                   |
|         | F |                  |                   |                   |
|         | e |                  |                   |                   |
|         | b |                  |                   |                   |
|         | r |                  |                   |                   |
|         | u |                  |                   |                   |
|         | a |                  |                   |                   |
|         | r |                  |                   |                   |
|         | y |                  |                   |                   |
|         | 2 |                  |                   |                   |
|         | 0 |                  |                   |                   |
|         | 0 |                  |                   |                   |
|         | 3 |                  |                   |                   |
|         | . |                  |                   |                   |
|         | M |                  |                   |                   |
|         | o |                  |                   |                   |
|         | s |                  |                   |                   |
|         | t |                  |                   |                   |
|         | r |                  |                   |                   |
|         | e |                  |                   |                   |
|         | c |                  |                   |                   |
|         | e |                  |                   |                   |
|         | n |                  |                   |                   |
|         | t |                  |                   |                   |
|         | l |                  |                   |                   |
|         | y |                  |                   |                   |
|         | r |                  |                   |                   |
|         | e |                  |                   |                   |
|         | c |                  |                   |                   |
|         | e |                  |                   |                   |
|         | i |                  |                   |                   |
|         | v |                  |                   |                   |
|         | e |                  |                   |                   |
|         | d |                  |                   |                   |
|         | d |                  |                   |                   |
|         | a |                  |                   |                   |
|         | t |                  |                   |                   |
|         | a |                  |                   |                   |
|         | ( |                  |                   |                   |
|         | e |                  |                   |                   |
|         | a |                  |                   |                   |
|         | r |                  |                   |                   |
|         | l |                  |                   |                   |
|         | y |                  |                   |                   |
|         | M |                  |                   |                   |
|         | a |                  |                   |                   |
|         | r |                  |                   |                   |
|         | c |                  |                   |                   |
|         | h |                  |                   |                   |
|         | ) |                  |                   |                   |
|         | s |                  |                   |                   |
|         | u |                  |                   |                   |
|         | g |                  |                   |                   |
|         | g |                  |                   |                   |
|         | e |                  |                   |                   |
|         | s |                  |                   |                   |
|         | t |                  |                   |                   |
|         | p |                  |                   |                   |
|         | r |                  |                   |                   |
|         | o |                  |                   |                   |
|         | b |                  |                   |                   |
|         | l |                  |                   |                   |
|         | e |                  |                   |                   |
|         | m |                  |                   |                   |
|         | h |                  |                   |                   |
|         | a |                  |                   |                   |
|         | s |                  |                   |                   |
|         | b |                  |                   |                   |
|         | e |                  |                   |                   |
|         | e |                  |                   |                   |
|         | n |                  |                   |                   |
|         | c |                  |                   |                   |
|         | o |                  |                   |                   |
|         | r |                  |                   |                   |
|         | r |                  |                   |                   |
|         | e |                  |                   |                   |
|         | c |                  |                   |                   |
|         | t |                  |                   |                   |
|         | e |                  |                   |                   |
|         | d |                  |                   |                   |
|         | . |                  |                   |                   |
+---------+---+------------------+-------------------+-------------------+
|         |   |                  |                   |                   |
+---------+---+------------------+-------------------+-------------------+

###### Table 2

OWQRL PERFORMANCE ON IBSP SAMPLES

######### **Note: Click the blue, underlined text in the left column to access the control chart for the associated parameter.**

+----------+------------------+-------------------+-------------------+
| **       | **Problem**      | **OWQRL**         | **Corrective**    |
| Nutrient |                  |                   |                   |
| Determin |                  | **Lab Comment**   | **Action**        |
| ations** |                  |                   |                   |
+==========+==================+===================+===================+
| [**Pho   | **All data       | **Most of the     | **The cause of    |
| sphorus, | received since   | data points       | the bias is       |
| Filt     | May 1^st^, 2003, | exhibiting the    | currently being   |
| ered**]( | indicate a       | negative bias are | investigated.     |
| http://b | negative bias.** | a commercially    | This line is      |
| qs.usgs. |                  | obtained sample   | being monitored   |
| gov/bsp/ | **The NWQL is    | that has also     | closely.**        |
| QADATA_a | not showing this | exhibited a       |                   |
| ll/SEP03 | bias.**          | negative bias     |                   |
| OWQRL006 |                  | when run at the   |                   |
| 66D.gif) |                  | NWQL. Other blind |                   |
| **Colori |                  | samples are also  |                   |
| metric** |                  | showing a         |                   |
|          |                  | negative bias,    |                   |
| labcode  |                  | though not as     |                   |
| 1983     |                  | much as the       |                   |
| parmcode |                  | commercial one.   |                   |
| 0666D    |                  | Whole-water       |                   |
|          |                  | recoverable       |                   |
|          |                  | phosphorus, which |                   |
|          |                  | is analyzed on    |                   |
|          |                  | the same          |                   |
|          |                  | instrument at the |                   |
|          |                  | same time, is not |                   |
|          |                  | showing this same |                   |
|          |                  | bias. The same    |                   |
|          |                  | commercially      |                   |
|          |                  | obtained sample   |                   |
|          |                  | is not submitted  |                   |
|          |                  | for Total         |                   |
|          |                  | Phosphorus.**     |                   |
+----------+------------------+-------------------+-------------------+
|          |                  |                   |                   |
+----------+------------------+-------------------+-------------------+

+----------+------------------+-------------------+-------------------+
| **Trace  | **Problem**      | **OWQRL**         | **Corrective**    |
| Metal    |                  |                   |                   |
| Determin |                  | **Lab Comment**   | **Action**        |
| ations** |                  |                   |                   |
+==========+==================+===================+===================+
| [**      | The most         | **Problems with   | **All of our lamp |
| Arsenic, | recently         | low energy from   | power supplies    |
| Who      | received data    | the Arsenic lamp  | for the graphite  |
| le-Water | indicate         | have led to       | furnace have been |
| Recover  | on-going         | increased         | evaluated and     |
| able**]( | problems with    | variability and   | those that need   |
| http://b | variability and  | decreased         | to be replaced    |
| qs.usgs. | a positive bias. | sensitivity.**    | have been         |
| gov/bsp/ |                  |                   | identified. The   |
| QADATA_a | Since October    |                   | instrument is     |
| ll/SEP03 | 2002, five out   |                   | also currently    |
| OWQRL010 | of 19 points     |                   | being run in the  |
| 021.gif) | (26%) are        |                   | single rather     |
|          | outside of +/-2  |                   | than              |
| **GFAA   | SD with 3 of 19  |                   | multi-element     |
| labcode  | (16%) outside of |                   | mode to help      |
| 3119     | +/-3 SD.         |                   | increase          |
| parmcode |                  |                   | sensitivity and   |
| 1        |                  |                   | decrease the      |
| 002(1)** |                  |                   | variability.**    |
+----------+------------------+-------------------+-------------------+
| *        |                  |                   |                   |
| Previous |                  |                   |                   |
| comments |                  |                   |                   |
| for      |                  |                   |                   |
| arsenic, |                  |                   |                   |
| who      |                  |                   |                   |
| le-water |                  |                   |                   |
| reco     |                  |                   |                   |
| verable, |                  |                   |                   |
| labcode  |                  |                   |                   |
| 3119,    |                  |                   |                   |
| parmcode |                  |                   |                   |
| 1002(1)* |                  |                   |                   |
+----------+------------------+-------------------+-------------------+
| From     | The two new      | The problems with | We will continue  |
|          | values received  | the GFAA at low   | to monitor the    |
| QADATA   | since the last   | wavelengths have  | GFAA closely to   |
| Summary  | QADATA Summary   | been corrected.   | be sure that the  |
| July     | are both within\ |                   | problems do not   |
| 2003     | one              |                   | reappear.         |
|          | f-pseudosigma of |                   |                   |
|          | the median.      |                   |                   |
|          |                  |                   |                   |
|          | Analysis should  |                   |                   |
|          | be closely       |                   |                   |
|          | monitored until  |                   |                   |
|          | the next QADATA  |                   |                   |
|          | Summary is       |                   |                   |
|          | distributed.     |                   |                   |
+----------+------------------+-------------------+-------------------+
| From     | The variability  | We will be        | More service work |
|          | is beyond        | running a new     | was done to       |
| QADATA   | acceptable       | Demonstration of  | correct problems  |
| Summary  | levels. IBSP     | Capability for    | with the GFAA.    |
| May 2003 | recommends that  | Arsenic before    | Past samples have |
|          | the source of    | any more samples  | been checked by   |
|          | the problem be   | are analyzed.     | other techniques  |
|          | determined       |                   | (ICP, ICP/MS) to  |
|          | before any more  |                   | make sure that    |
|          | analyses of      |                   | values reported   |
|          | environmental    |                   | are correct.      |
|          | samples are      |                   |                   |
|          | performed.       |                   |                   |
|          |                  |                   |                   |
|          | Since October    |                   |                   |
|          | 2002, four out   |                   |                   |
|          | of 13 points     |                   |                   |
|          | (31%) are        |                   |                   |
|          | outside of +/-2  |                   |                   |
|          | SD with 3 of 13  |                   |                   |
|          | (23%) outside of |                   |                   |
|          | +/-3 SD.         |                   |                   |
+----------+------------------+-------------------+-------------------+
| From     | High variability | A problem with    | Service was       |
|          | is still         | the beam combiner | performed on the  |
| QADATA   | exhibited. Since | on the SIMAA      | AA to correct the |
| Summary  | late October     | graphite furnace  | problem. Samples  |
| March    | 2002, three out  | may have led to   | are being rerun   |
| 2003     | of 9 points      | some erratic      | to see if any     |
|          | (33%) are        | results.          | data needs to be  |
|          | outside of +/-2  |                   | corrected.        |
|          | SD.              |                   |                   |
+----------+------------------+-------------------+-------------------+
| From     | Increased        | Problem with      | Amount of matrix  |
|          | variability      | matrix modifier.  | modifier used was |
| QADATA   | starting late    |                   | adjusted to give  |
| Summary  | October 2002.    |                   | more consistent   |
| January  |                  |                   | results.          |
| 2003     |                  |                   |                   |
+----------+------------------+-------------------+-------------------+
|          |                  |                   |                   |
+----------+------------------+-------------------+-------------------+