##### QADATA Summary -- August 2006

The Inorganic Blind Sample Project (IBSP) of the Branch of Quality
Systems reviews about 100 inorganic analytical lines at the National
Water Quality Laboratory (NWQL) using double-blind, quality-control
samples. A summary of this review, the QADATA Summary, is a short report
commenting on only those analytical lines for which the quality-control
charts indicate or have indicated a bias and/or higher than expected
variability. Overall, the vast majority of the inorganic methods at the
NWQL demonstrate acceptable variability and little or no bias.

The data reviewed in this summary is for the time period 01/01/06
through 07/27/06; however, longer-range charts may be used when they add
clarity to the problem. The attached quality-control charts contain data
from samples that have been subject to the same laboratory handling
procedures as the samples submitted by the USGS district offices, and
the data have the same level of quality-control review as the data
released to the districts. Therefore, any factors that affect the data
displayed on the IBSP quality-control charts should also affect the
districts' data in a similar manner. Data from samples known to have
been affected by a problem independent of the NWQL are removed from the
charts.

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

Current charts (updated twice weekly) may be accessed at
<http://bqs.usgs.gov/bsp/FY06charts.htm>. Laboratory and district
personnel can have their own custom QADATA retrieval to parallel their
objectives by contacting Ted Struzeski (303.236.1872,
<struzesk@usgs.gov>) or by using the QADATA Application online at
[http://bqs.usgs.gov/bsp](http://bqs.usgs.gov/bsp/mainpage.html) (select
QADATA Application button). Charts pertaining specifically to this
report can be accessed electronically by following the underlined
hyperlinks embedded within the report and associated with each analysis
discussed.

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

*Tedmund M. Struzeski*

<struzesk@usgs.gov>

Table of Contents

Report Highlights Page

[One-Page Summary](#Highlights) 3

Detailed Description by Analyte

Nutrients

[Phosphorus, Filtered,](#nwql2331) (Low-level), Colorimetry, Labcode
2331, Parmcode 0666G 4

Trace Metals

[Chromium, Filtered,](#nwql0722) ICP, Labcode 0722, Parmcode 1030E 5

[Mercury, Filtered,](#nwql2707) CVAF, Labcode 2707, Parmcode 71890C 5

[Mercury, Whole-Water Recoverable,](#nwql2708) CVAF, Labcode 2708,
Parmcode 71900D 5

[Nickel, Filtered,](#nwql1795) ICP-MS, Labcode 1795, Parmcode 1065G 5

[Strontium, Filtered,](#nwql2507) ICP-MS, Labcode 2507, Parmcode 1080I 6

[Zinc, Whole-Water Recoverable,](#nwql2390) ICP-MS, Labcode 2390,
Parmcode 1092D 6

Majors

[Alkalinity, Filtered,](#nwql2109) Electrometry, Labcode 2109, Parmcode
29801A 7

[Alkalinity, Whole-Water Recoverable,](#nwql0070) Electrometry, Labcode
0070, Parmcode 90410A 7

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

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

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

1.  [Chromium,](http://bqs.usgs.gov/bsp/QADATA_all/06Aug/Aug06NWQL01030E.gif)
    filtered, ICP, parmcode 1030E -- Positive bias (16%) starting May
    2006.

2.  [Mercury](http://bqs.usgs.gov/bsp/QADATA_all/06Aug/Aug06NWQL71890C.gif),
    filtered, CVAF, parmcode 71890C -- Slight negative starting mid June
    2006.

3.  [Mercury](http://bqs.usgs.gov/bsp/QADATA_all/06Aug/Aug06NWQL71900D.gif),
    whole-water recoverable, CVAF, parmcode 71900D -- Slight negative
    bias starting early June 2006.

4.  [Nickel,](http://bqs.usgs.gov/bsp/QADATA_all/06Aug/Aug06NWQL01065G.gif)
    filtered, ICP-MS, parmcode 1065G -- Positive bias starting mid May
    2006.

5.  [Zinc,](http://bqs.usgs.gov/bsp/QADATA_all/06Aug/Aug06NWQL01092D.gif)
    whole-water recoverable, ICP-MS, parmcode 1092D -- Slight negative
    bias starting April 2006.

NWQL PERFORMANCE ON IBSP SAMPLES

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

+---------+---+------------------+-------------------+-------------------+
| **N     |   | **Problem**      | **NWQL**          | **Corrective**    |
| utrient |   |                  |                   |                   |
| De      |   |                  | **Lab Comment**   | **Action**        |
| termina |   |                  |                   |                   |
| tions** |   |                  |                   |                   |
+=========+===+==================+===================+===================+
| [[]{#n  |   | **Variability    |                   |                   |
| wql2331 |   | has improved and |                   |                   |
| .anchor |   | very little bias |                   |                   |
| }**Phos |   | is present. Most |                   |                   |
| phorus, |   | results received |                   |                   |
| Fil     |   | since the last   |                   |                   |
| tered** |   | QADATA Summary   |                   |                   |
| ](http: |   | are within +/-1  |                   |                   |
| //bqs.u |   | f-pseudosigma of |                   |                   |
| sgs.gov |   | the target       |                   |                   |
| /bsp/QA |   | value.**         |                   |                   |
| DATA_al |   |                  |                   |                   |
| l/06Aug |   | **No corrective  |                   |                   |
| /Aug06N |   | action           |                   |                   |
| WQL0066 |   | necessary.**     |                   |                   |
| 6G.gif) |   |                  |                   |                   |
| **Lo    |   |                  |                   |                   |
| w-level |   |                  |                   |                   |
| Colo    |   |                  |                   |                   |
| rimetry |   |                  |                   |                   |
| labcode |   |                  |                   |                   |
| 2331    |   |                  |                   |                   |
| p       |   |                  |                   |                   |
| armcode |   |                  |                   |                   |
| 0666G** |   |                  |                   |                   |
+---------+---+------------------+-------------------+-------------------+
| *P      |   |                  |                   |                   |
| revious |   |                  |                   |                   |
| c       |   |                  |                   |                   |
| omments |   |                  |                   |                   |
| for     |   |                  |                   |                   |
| lo      |   |                  |                   |                   |
| w-level |   |                  |                   |                   |
| phos    |   |                  |                   |                   |
| phorus, |   |                  |                   |                   |
| fi      |   |                  |                   |                   |
| ltered, |   |                  |                   |                   |
| color   |   |                  |                   |                   |
| imetry, |   |                  |                   |                   |
| labcode |   |                  |                   |                   |
| 2331,   |   |                  |                   |                   |
| p       |   |                  |                   |                   |
| armcode |   |                  |                   |                   |
| 0666G*  |   |                  |                   |                   |
+---------+---+------------------+-------------------+-------------------+
| From    | A |                  | One of the        | The analyst       |
|         | p |                  | samples was       | operating the     |
| >       | o |                  | determined to be  | instrument has    |
|  QADATA | s |                  | a mispour by the  | been instructed   |
| >       | i |                  | analyst. Further  | to take greater   |
| Summary | t |                  | investigation is  | care when         |
| > June  | i |                  | now under way to  | preparing samples |
| > 2006  | v |                  | determine the     | for analysis. We  |
|         | e |                  | cause of the      | are examining the |
|         | b |                  | lower-than-target | original data and |
|         | i |                  | values for the    | are rerunning the |
|         | a |                  | other three       | other three       |
|         | s |                  | samples.          | samples to        |
|         | s |                  |                   | determine if they |
|         | t |                  |                   | were mispoured as |
|         | a |                  |                   | well. The         |
|         | r |                  |                   | examination is    |
|         | t |                  |                   | targeted to be    |
|         | i |                  |                   | completed by June |
|         | n |                  |                   | 16, 2006. Further |
|         | g |                  |                   | corrective action |
|         | i |                  |                   | may be necessary  |
|         | n |                  |                   | depending on the  |
|         | 2 |                  |                   | results of the    |
|         | 0 |                  |                   | investigation.    |
|         | 0 |                  |                   |                   |
|         | 5 |                  |                   |                   |
|         | i |                  |                   |                   |
|         | s |                  |                   |                   |
|         | s |                  |                   |                   |
|         | h |                  |                   |                   |
|         | o |                  |                   |                   |
|         | w |                  |                   |                   |
|         | n |                  |                   |                   |
|         | i |                  |                   |                   |
|         | m |                  |                   |                   |
|         | p |                  |                   |                   |
|         | r |                  |                   |                   |
|         | o |                  |                   |                   |
|         | v |                  |                   |                   |
|         | i |                  |                   |                   |
|         | n |                  |                   |                   |
|         | g |                  |                   |                   |
|         | i |                  |                   |                   |
|         | n |                  |                   |                   |
|         | F |                  |                   |                   |
|         | e |                  |                   |                   |
|         | b |                  |                   |                   |
|         | r |                  |                   |                   |
|         | u |                  |                   |                   |
|         | a |                  |                   |                   |
|         | r |                  |                   |                   |
|         | y |                  |                   |                   |
|         | 2 |                  |                   |                   |
|         | 0 |                  |                   |                   |
|         | 0 |                  |                   |                   |
|         | 6 |                  |                   |                   |
|         | . |                  |                   |                   |
|         | H |                  |                   |                   |
|         | o |                  |                   |                   |
|         | w |                  |                   |                   |
|         | e |                  |                   |                   |
|         | v |                  |                   |                   |
|         | e |                  |                   |                   |
|         | r |                  |                   |                   |
|         | , |                  |                   |                   |
|         | v |                  |                   |                   |
|         | a |                  |                   |                   |
|         | r |                  |                   |                   |
|         | i |                  |                   |                   |
|         | a |                  |                   |                   |
|         | b |                  |                   |                   |
|         | i |                  |                   |                   |
|         | l |                  |                   |                   |
|         | i |                  |                   |                   |
|         | t |                  |                   |                   |
|         | y |                  |                   |                   |
|         | h |                  |                   |                   |
|         | a |                  |                   |                   |
|         | s |                  |                   |                   |
|         | i |                  |                   |                   |
|         | n |                  |                   |                   |
|         | c |                  |                   |                   |
|         | r |                  |                   |                   |
|         | e |                  |                   |                   |
|         | a |                  |                   |                   |
|         | s |                  |                   |                   |
|         | e |                  |                   |                   |
|         | d |                  |                   |                   |
|         | a |                  |                   |                   |
|         | s |                  |                   |                   |
|         | o |                  |                   |                   |
|         | f |                  |                   |                   |
|         | l |                  |                   |                   |
|         | a |                  |                   |                   |
|         | t |                  |                   |                   |
|         | e |                  |                   |                   |
|         | J |                  |                   |                   |
|         | a |                  |                   |                   |
|         | n |                  |                   |                   |
|         | u |                  |                   |                   |
|         | a |                  |                   |                   |
|         | r |                  |                   |                   |
|         | y |                  |                   |                   |
|         | 2 |                  |                   |                   |
|         | 0 |                  |                   |                   |
|         | 0 |                  |                   |                   |
|         | 6 |                  |                   |                   |
|         | . |                  |                   |                   |
|         | S |                  |                   |                   |
|         | i |                  |                   |                   |
|         | n |                  |                   |                   |
|         | c |                  |                   |                   |
|         | e |                  |                   |                   |
|         | t |                  |                   |                   |
|         | h |                  |                   |                   |
|         | e |                  |                   |                   |
|         | n |                  |                   |                   |
|         | , |                  |                   |                   |
|         | f |                  |                   |                   |
|         | o |                  |                   |                   |
|         | u |                  |                   |                   |
|         | r |                  |                   |                   |
|         | o |                  |                   |                   |
|         | u |                  |                   |                   |
|         | t |                  |                   |                   |
|         | o |                  |                   |                   |
|         | f |                  |                   |                   |
|         | 3 |                  |                   |                   |
|         | 4 |                  |                   |                   |
|         | r |                  |                   |                   |
|         | e |                  |                   |                   |
|         | s |                  |                   |                   |
|         | u |                  |                   |                   |
|         | l |                  |                   |                   |
|         | t |                  |                   |                   |
|         | s |                  |                   |                   |
|         | ( |                  |                   |                   |
|         | 1 |                  |                   |                   |
|         | 2 |                  |                   |                   |
|         | % |                  |                   |                   |
|         | ) |                  |                   |                   |
|         | a |                  |                   |                   |
|         | r |                  |                   |                   |
|         | e |                  |                   |                   |
|         | m |                  |                   |                   |
|         | o |                  |                   |                   |
|         | r |                  |                   |                   |
|         | e |                  |                   |                   |
|         | t |                  |                   |                   |
|         | h |                  |                   |                   |
|         | a |                  |                   |                   |
|         | n |                  |                   |                   |
|         | 4 |                  |                   |                   |
|         | f |                  |                   |                   |
|         | - |                  |                   |                   |
|         | p |                  |                   |                   |
|         | s |                  |                   |                   |
|         | e |                  |                   |                   |
|         | u |                  |                   |                   |
|         | d |                  |                   |                   |
|         | o |                  |                   |                   |
|         | s |                  |                   |                   |
|         | i |                  |                   |                   |
|         | g |                  |                   |                   |
|         | m |                  |                   |                   |
|         | a |                  |                   |                   |
|         | s |                  |                   |                   |
|         | l |                  |                   |                   |
|         | o |                  |                   |                   |
|         | w |                  |                   |                   |
|         | e |                  |                   |                   |
|         | r |                  |                   |                   |
|         | t |                  |                   |                   |
|         | h |                  |                   |                   |
|         | a |                  |                   |                   |
|         | n |                  |                   |                   |
|         | t |                  |                   |                   |
|         | h |                  |                   |                   |
|         | e |                  |                   |                   |
|         | t |                  |                   |                   |
|         | a |                  |                   |                   |
|         | r |                  |                   |                   |
|         | g |                  |                   |                   |
|         | e |                  |                   |                   |
|         | t |                  |                   |                   |
|         | v |                  |                   |                   |
|         | a |                  |                   |                   |
|         | l |                  |                   |                   |
|         | u |                  |                   |                   |
|         | e |                  |                   |                   |
|         | . |                  |                   |                   |
+---------+---+------------------+-------------------+-------------------+
|         |   |                  |                   |                   |
+---------+---+------------------+-------------------+-------------------+

+---------+---+------------------+-------------------+-------------------+
| **Trace | * |                  | **NWQL**          | **Corrective**    |
| Metal   | * |                  |                   |                   |
| De      | P |                  | **Comment**       | **Action**        |
| termina | r |                  |                   |                   |
| tions** | o |                  |                   |                   |
|         | b |                  |                   |                   |
|         | l |                  |                   |                   |
|         | e |                  |                   |                   |
|         | m |                  |                   |                   |
|         | * |                  |                   |                   |
|         | * |                  |                   |                   |
+=========+===+==================+===================+===================+
| [[]{#n  |   | **Results show a | **The analyst had | **Line will be    |
| wql0722 |   | marked upward    | noted the same    | monitored to      |
| .anch   |   | shift as of May  | bias and made new | ensure that the   |
| or}**Ch |   | 2006. The        | calibration       | new calibration   |
| romium, |   | average bias     | standards in      | standards         |
| Fil     |   | since then is    | mid-July. On-line | corrected the     |
| tered** |   | 16% above the    | QC charts         | bias.**           |
| ](http: |   | target value.**  | indicate that     |                   |
| //bqs.u |   |                  | this has          |                   |
| sgs.gov |   |                  | corrected the     |                   |
| /bsp/QA |   |                  | bias.**           |                   |
| DATA_al |   |                  |                   |                   |
| l/06Aug |   |                  |                   |                   |
| /Aug06N |   |                  |                   |                   |
| WQL0103 |   |                  |                   |                   |
| 0E.gif) |   |                  |                   |                   |
| **ICP   |   |                  |                   |                   |
| labcode |   |                  |                   |                   |
| 0722    |   |                  |                   |                   |
| p       |   |                  |                   |                   |
| armcode |   |                  |                   |                   |
| 1030E** |   |                  |                   |                   |
+---------+---+------------------+-------------------+-------------------+
|         |   |                  |                   |                   |
+---------+---+------------------+-------------------+-------------------+
| [[]{#n  |   | **Results        | **Bias shifts     | **New stock       |
| wql2707 |   | received as of   | appear to         | solutions have    |
| .anc    |   | June 15, 2006,   | correspond with   | arrived and new   |
| hor}**M |   | exhibit an       | the times new     | calibration       |
| ercury, |   | average negative | calibration       | standards were    |
| Fil     |   | bias of 6.5%     | standards were    | made. Initial     |
| tered** |   | below the target | made. Even though | indications are   |
| ](http: |   | value. The most  | the stock         | that the new      |
| //bqs.u |   | recently         | solutions do not  | calibration       |
| sgs.gov |   | received data,   | expire until      | standards have    |
| /bsp/QA |   | however, show    | December they     | corrected the     |
| DATA_al |   | improvement.**   | appear to be      | bias. The         |
| l/06Aug |   |                  | degrading.**      | analytical line   |
| /Aug06N |   | **Analysis       |                   | will be monitored |
| WQL7189 |   | should be        |                   | to track the      |
| 0C.gif) |   | closely          |                   | effects of this   |
| **CVAF  |   | monitored until  |                   | change and the    |
| labcode |   | the next QADATA  |                   | stock solutions   |
| 2707    |   | Summary is       |                   | will be checked   |
| p       |   | distributed.**   |                   | monthly to        |
| armcode |   |                  |                   | monitor for       |
| 7       |   |                  |                   | degradation of    |
| 1890C** |   |                  |                   | the stock         |
|         |   |                  |                   | solutions.**      |
+---------+---+------------------+-------------------+-------------------+
|         |   |                  |                   |                   |
+---------+---+------------------+-------------------+-------------------+
| [[]{#n  |   | **As of early    | **Bias shifts     | **New stock       |
| wql2708 |   | June 2006, the   | appear to         | solutions have    |
| .anc    |   | results show a   | correspond with   | arrived and new   |
| hor}**M |   | negative bias.   | the times new     | calibration       |
| ercury, |   | The average bias | calibration       | standards were    |
| Whol    |   | since then is    | standards were    | made. Initial     |
| e-Water |   | 7.0% below the   | made. Even though | indications are   |
| Recove  |   | target value.**  | the stock         | that the new      |
| rable** |   |                  | solutions do not  | calibration       |
| ](http: |   |                  | expire until      | standards have    |
| //bqs.u |   |                  | December they     | corrected the     |
| sgs.gov |   |                  | appear to be      | bias. The         |
| /bsp/QA |   |                  | degrading.**      | analytical line   |
| DATA_al |   |                  |                   | will be monitored |
| l/06Aug |   |                  |                   | to track the      |
| /Aug06N |   |                  |                   | effects of this   |
| WQL7190 |   |                  |                   | change and the    |
| 0D.gif) |   |                  |                   | stock solutions   |
| **CVAF  |   |                  |                   | will be checked   |
| labcode |   |                  |                   | monthly to        |
| 2708    |   |                  |                   | monitor for       |
| p       |   |                  |                   | degradation of    |
| armcode |   |                  |                   | the stock         |
| 7       |   |                  |                   | solutions.**      |
| 1900D** |   |                  |                   |                   |
+---------+---+------------------+-------------------+-------------------+
|         |   |                  |                   |                   |
+---------+---+------------------+-------------------+-------------------+
| [[]{#n  |   | **Data received  | **This analysis   | **The analytical  |
| wql1795 |   | as of mid March  | has been moved    | line will be      |
| .an     |   | 2006 demonstrate | from ICP-MS       | monitored to      |
| chor}** |   | a positive bias. | instrument to the | ensure that the   |
| Nickel, |   | As of then, 31   | new               | move and the new  |
| Fil     |   | out of 32        | collision-cell    | calibration       |
| tered** |   | results are      | ICP-MS            | standards         |
| ](http: |   | above the target | instrument. New   | corrected the     |
| //bqs.u |   | value. No bias   | calibration       | bias. To date     |
| sgs.gov |   | is evident for   | standards were    | indications are   |
| /bsp/QA |   | WWR nickel       | prepared          | that these        |
| DATA_al |   | (parmcode        | mid-July.**       | actions have      |
| l/06Aug |   | 1067I).**        |                   | corrected the     |
| /Aug06N |   |                  |                   | bias.**           |
| WQL0106 |   |                  |                   |                   |
| 5G.gif) |   |                  |                   |                   |
| *       |   |                  |                   |                   |
| *ICP-MS |   |                  |                   |                   |
| labcode |   |                  |                   |                   |
| 1795    |   |                  |                   |                   |
| p       |   |                  |                   |                   |
| armcode |   |                  |                   |                   |
| 1065G** |   |                  |                   |                   |
+---------+---+------------------+-------------------+-------------------+
|         |   |                  |                   |                   |
+---------+---+------------------+-------------------+-------------------+
| [[]{#n  | * |                  | []{.mark}         | []{.mark}         |
| wql2507 | * |                  |                   |                   |
| .ancho  | S |                  |                   |                   |
| r}**Str | i |                  |                   |                   |
| ontium, | n |                  |                   |                   |
| Fil     | c |                  |                   |                   |
| tered** | e |                  |                   |                   |
| ](http: | t |                  |                   |                   |
| //bqs.u | h |                  |                   |                   |
| sgs.gov | e |                  |                   |                   |
| /bsp/QA | l |                  |                   |                   |
| DATA_al | a |                  |                   |                   |
| l/06Aug | s |                  |                   |                   |
| /Aug06N | t |                  |                   |                   |
| WQL0108 | Q |                  |                   |                   |
| 0I.gif) | A |                  |                   |                   |
| *       | D |                  |                   |                   |
| *ICP-MS | A |                  |                   |                   |
| labcode | T |                  |                   |                   |
| 2507    | A |                  |                   |                   |
| p       | S |                  |                   |                   |
| armcode | u |                  |                   |                   |
| 1080I** | m |                  |                   |                   |
|         | m |                  |                   |                   |
|         | a |                  |                   |                   |
|         | r |                  |                   |                   |
|         | y |                  |                   |                   |
|         | , |                  |                   |                   |
|         | r |                  |                   |                   |
|         | e |                  |                   |                   |
|         | s |                  |                   |                   |
|         | u |                  |                   |                   |
|         | l |                  |                   |                   |
|         | t |                  |                   |                   |
|         | s |                  |                   |                   |
|         | f |                  |                   |                   |
|         | o |                  |                   |                   |
|         | r |                  |                   |                   |
|         | a |                  |                   |                   |
|         | l |                  |                   |                   |
|         | l |                  |                   |                   |
|         | b |                  |                   |                   |
|         | l |                  |                   |                   |
|         | i |                  |                   |                   |
|         | n |                  |                   |                   |
|         | d |                  |                   |                   |
|         | s |                  |                   |                   |
|         | a |                  |                   |                   |
|         | m |                  |                   |                   |
|         | p |                  |                   |                   |
|         | l |                  |                   |                   |
|         | e |                  |                   |                   |
|         | s |                  |                   |                   |
|         | s |                  |                   |                   |
|         | u |                  |                   |                   |
|         | b |                  |                   |                   |
|         | m |                  |                   |                   |
|         | i |                  |                   |                   |
|         | t |                  |                   |                   |
|         | t |                  |                   |                   |
|         | e |                  |                   |                   |
|         | d |                  |                   |                   |
|         | s |                  |                   |                   |
|         | h |                  |                   |                   |
|         | o |                  |                   |                   |
|         | w |                  |                   |                   |
|         | a |                  |                   |                   |
|         | c |                  |                   |                   |
|         | c |                  |                   |                   |
|         | e |                  |                   |                   |
|         | p |                  |                   |                   |
|         | t |                  |                   |                   |
|         | a |                  |                   |                   |
|         | b |                  |                   |                   |
|         | l |                  |                   |                   |
|         | e |                  |                   |                   |
|         | b |                  |                   |                   |
|         | i |                  |                   |                   |
|         | a |                  |                   |                   |
|         | s |                  |                   |                   |
|         | a |                  |                   |                   |
|         | n |                  |                   |                   |
|         | d |                  |                   |                   |
|         | v |                  |                   |                   |
|         | a |                  |                   |                   |
|         | r |                  |                   |                   |
|         | i |                  |                   |                   |
|         | a |                  |                   |                   |
|         | b |                  |                   |                   |
|         | i |                  |                   |                   |
|         | l |                  |                   |                   |
|         | i |                  |                   |                   |
|         | t |                  |                   |                   |
|         | y |                  |                   |                   |
|         | . |                  |                   |                   |
|         | * |                  |                   |                   |
|         | * |                  |                   |                   |
|         |   |                  |                   |                   |
|         | * |                  |                   |                   |
|         | * |                  |                   |                   |
|         | N |                  |                   |                   |
|         | o |                  |                   |                   |
|         | c |                  |                   |                   |
|         | o |                  |                   |                   |
|         | r |                  |                   |                   |
|         | r |                  |                   |                   |
|         | e |                  |                   |                   |
|         | c |                  |                   |                   |
|         | t |                  |                   |                   |
|         | i |                  |                   |                   |
|         | v |                  |                   |                   |
|         | e |                  |                   |                   |
|         | a |                  |                   |                   |
|         | c |                  |                   |                   |
|         | t |                  |                   |                   |
|         | i |                  |                   |                   |
|         | o |                  |                   |                   |
|         | n |                  |                   |                   |
|         | n |                  |                   |                   |
|         | e |                  |                   |                   |
|         | c |                  |                   |                   |
|         | e |                  |                   |                   |
|         | s |                  |                   |                   |
|         | s |                  |                   |                   |
|         | a |                  |                   |                   |
|         | r |                  |                   |                   |
|         | y |                  |                   |                   |
|         | . |                  |                   |                   |
|         | * |                  |                   |                   |
|         | * |                  |                   |                   |
+---------+---+------------------+-------------------+-------------------+
| *P      |   |                  |                   |                   |
| revious |   |                  |                   |                   |
| c       |   |                  |                   |                   |
| omments |   |                  |                   |                   |
| for     |   |                  |                   |                   |
| str     |   |                  |                   |                   |
| ontium, |   |                  |                   |                   |
| fi      |   |                  |                   |                   |
| ltered, |   |                  |                   |                   |
| ICP-MS, |   |                  |                   |                   |
| labcode |   |                  |                   |                   |
| 2507,   |   |                  |                   |                   |
| p       |   |                  |                   |                   |
| armcode |   |                  |                   |                   |
| 1080I*  |   |                  |                   |                   |
+---------+---+------------------+-------------------+-------------------+
| From    | R |                  | New calibration   | Analysis will be  |
|         | e |                  | standards were    | closely monitored |
| >       | s |                  | prepared in May.  | until next QADATA |
|  QADATA | u |                  | All blind samples | Summary is        |
| >       | l |                  | have been rerun   | distributed.      |
| Summary | t |                  | using the new     |                   |
| > June  | s |                  | calibration       |                   |
| > 2006  | f |                  | standards and no  |                   |
|         | r |                  | bias is evident   |                   |
|         | o |                  | at this time.     |                   |
|         | m |                  |                   |                   |
|         | t |                  |                   |                   |
|         | h |                  |                   |                   |
|         | e |                  |                   |                   |
|         | l |                  |                   |                   |
|         | o |                  |                   |                   |
|         | w |                  |                   |                   |
|         | c |                  |                   |                   |
|         | o |                  |                   |                   |
|         | n |                  |                   |                   |
|         | c |                  |                   |                   |
|         | e |                  |                   |                   |
|         | n |                  |                   |                   |
|         | t |                  |                   |                   |
|         | r |                  |                   |                   |
|         | a |                  |                   |                   |
|         | t |                  |                   |                   |
|         | i |                  |                   |                   |
|         | o |                  |                   |                   |
|         | n |                  |                   |                   |
|         | b |                  |                   |                   |
|         | l |                  |                   |                   |
|         | i |                  |                   |                   |
|         | n |                  |                   |                   |
|         | d |                  |                   |                   |
|         | s |                  |                   |                   |
|         | a |                  |                   |                   |
|         | m |                  |                   |                   |
|         | p |                  |                   |                   |
|         | l |                  |                   |                   |
|         | e |                  |                   |                   |
|         | ( |                  |                   |                   |
|         | a |                  |                   |                   |
|         | t |                  |                   |                   |
|         | 3 |                  |                   |                   |
|         | 1 |                  |                   |                   |
|         | . |                  |                   |                   |
|         | 8 |                  |                   |                   |
|         | u |                  |                   |                   |
|         | g |                  |                   |                   |
|         | / |                  |                   |                   |
|         | L |                  |                   |                   |
|         | ) |                  |                   |                   |
|         | a |                  |                   |                   |
|         | r |                  |                   |                   |
|         | e |                  |                   |                   |
|         | b |                  |                   |                   |
|         | i |                  |                   |                   |
|         | a |                  |                   |                   |
|         | s |                  |                   |                   |
|         | e |                  |                   |                   |
|         | d |                  |                   |                   |
|         | o |                  |                   |                   |
|         | n |                  |                   |                   |
|         | a |                  |                   |                   |
|         | v |                  |                   |                   |
|         | e |                  |                   |                   |
|         | r |                  |                   |                   |
|         | a |                  |                   |                   |
|         | g |                  |                   |                   |
|         | e |                  |                   |                   |
|         | 6 |                  |                   |                   |
|         | . |                  |                   |                   |
|         | 4 |                  |                   |                   |
|         | % |                  |                   |                   |
|         | l |                  |                   |                   |
|         | o |                  |                   |                   |
|         | w |                  |                   |                   |
|         | e |                  |                   |                   |
|         | r |                  |                   |                   |
|         | t |                  |                   |                   |
|         | h |                  |                   |                   |
|         | a |                  |                   |                   |
|         | n |                  |                   |                   |
|         | t |                  |                   |                   |
|         | h |                  |                   |                   |
|         | e |                  |                   |                   |
|         | t |                  |                   |                   |
|         | a |                  |                   |                   |
|         | r |                  |                   |                   |
|         | g |                  |                   |                   |
|         | e |                  |                   |                   |
|         | t |                  |                   |                   |
|         | v |                  |                   |                   |
|         | a |                  |                   |                   |
|         | l |                  |                   |                   |
|         | u |                  |                   |                   |
|         | e |                  |                   |                   |
|         | . |                  |                   |                   |
|         | I |                  |                   |                   |
|         | n |                  |                   |                   |
|         | a |                  |                   |                   |
|         | d |                  |                   |                   |
|         | d |                  |                   |                   |
|         | i |                  |                   |                   |
|         | t |                  |                   |                   |
|         | i |                  |                   |                   |
|         | o |                  |                   |                   |
|         | n |                  |                   |                   |
|         | , |                  |                   |                   |
|         | a |                  |                   |                   |
|         | b |                  |                   |                   |
|         | o |                  |                   |                   |
|         | u |                  |                   |                   |
|         | t |                  |                   |                   |
|         | o |                  |                   |                   |
|         | n |                  |                   |                   |
|         | e |                  |                   |                   |
|         | - |                  |                   |                   |
|         | h |                  |                   |                   |
|         | a |                  |                   |                   |
|         | l |                  |                   |                   |
|         | f |                  |                   |                   |
|         | o |                  |                   |                   |
|         | f |                  |                   |                   |
|         | t |                  |                   |                   |
|         | h |                  |                   |                   |
|         | e |                  |                   |                   |
|         | r |                  |                   |                   |
|         | e |                  |                   |                   |
|         | s |                  |                   |                   |
|         | u |                  |                   |                   |
|         | l |                  |                   |                   |
|         | t |                  |                   |                   |
|         | s |                  |                   |                   |
|         | f |                  |                   |                   |
|         | o |                  |                   |                   |
|         | r |                  |                   |                   |
|         | t |                  |                   |                   |
|         | h |                  |                   |                   |
|         | i |                  |                   |                   |
|         | s |                  |                   |                   |
|         | s |                  |                   |                   |
|         | a |                  |                   |                   |
|         | m |                  |                   |                   |
|         | p |                  |                   |                   |
|         | l |                  |                   |                   |
|         | e |                  |                   |                   |
|         | a |                  |                   |                   |
|         | r |                  |                   |                   |
|         | e |                  |                   |                   |
|         | o |                  |                   |                   |
|         | u |                  |                   |                   |
|         | t |                  |                   |                   |
|         | s |                  |                   |                   |
|         | i |                  |                   |                   |
|         | d |                  |                   |                   |
|         | e |                  |                   |                   |
|         | o |                  |                   |                   |
|         | f |                  |                   |                   |
|         | t |                  |                   |                   |
|         | h |                  |                   |                   |
|         | e |                  |                   |                   |
|         | l |                  |                   |                   |
|         | o |                  |                   |                   |
|         | w |                  |                   |                   |
|         | e |                  |                   |                   |
|         | r |                  |                   |                   |
|         | c |                  |                   |                   |
|         | o |                  |                   |                   |
|         | n |                  |                   |                   |
|         | t |                  |                   |                   |
|         | r |                  |                   |                   |
|         | o |                  |                   |                   |
|         | l |                  |                   |                   |
|         | l |                  |                   |                   |
|         | i |                  |                   |                   |
|         | m |                  |                   |                   |
|         | i |                  |                   |                   |
|         | t |                  |                   |                   |
|         | ( |                  |                   |                   |
|         | - |                  |                   |                   |
|         | 2 |                  |                   |                   |
|         | f |                  |                   |                   |
|         | - |                  |                   |                   |
|         | p |                  |                   |                   |
|         | s |                  |                   |                   |
|         | e |                  |                   |                   |
|         | u |                  |                   |                   |
|         | d |                  |                   |                   |
|         | o |                  |                   |                   |
|         | s |                  |                   |                   |
|         | i |                  |                   |                   |
|         | g |                  |                   |                   |
|         | m |                  |                   |                   |
|         | a |                  |                   |                   |
|         | s |                  |                   |                   |
|         | ) |                  |                   |                   |
|         | . |                  |                   |                   |
|         | R |                  |                   |                   |
|         | e |                  |                   |                   |
|         | s |                  |                   |                   |
|         | u |                  |                   |                   |
|         | l |                  |                   |                   |
|         | t |                  |                   |                   |
|         | s |                  |                   |                   |
|         | f |                  |                   |                   |
|         | o |                  |                   |                   |
|         | r |                  |                   |                   |
|         | a |                  |                   |                   |
|         | l |                  |                   |                   |
|         | l |                  |                   |                   |
|         | o |                  |                   |                   |
|         | t |                  |                   |                   |
|         | h |                  |                   |                   |
|         | e |                  |                   |                   |
|         | r |                  |                   |                   |
|         | b |                  |                   |                   |
|         | l |                  |                   |                   |
|         | i |                  |                   |                   |
|         | n |                  |                   |                   |
|         | d |                  |                   |                   |
|         | s |                  |                   |                   |
|         | a |                  |                   |                   |
|         | m |                  |                   |                   |
|         | p |                  |                   |                   |
|         | l |                  |                   |                   |
|         | e |                  |                   |                   |
|         | s |                  |                   |                   |
|         | s |                  |                   |                   |
|         | u |                  |                   |                   |
|         | b |                  |                   |                   |
|         | m |                  |                   |                   |
|         | i |                  |                   |                   |
|         | t |                  |                   |                   |
|         | t |                  |                   |                   |
|         | e |                  |                   |                   |
|         | d |                  |                   |                   |
|         | s |                  |                   |                   |
|         | h |                  |                   |                   |
|         | o |                  |                   |                   |
|         | w |                  |                   |                   |
|         | a |                  |                   |                   |
|         | c |                  |                   |                   |
|         | c |                  |                   |                   |
|         | e |                  |                   |                   |
|         | p |                  |                   |                   |
|         | t |                  |                   |                   |
|         | a |                  |                   |                   |
|         | b |                  |                   |                   |
|         | l |                  |                   |                   |
|         | e |                  |                   |                   |
|         | b |                  |                   |                   |
|         | i |                  |                   |                   |
|         | a |                  |                   |                   |
|         | s |                  |                   |                   |
|         | a |                  |                   |                   |
|         | n |                  |                   |                   |
|         | d |                  |                   |                   |
|         | v |                  |                   |                   |
|         | a |                  |                   |                   |
|         | r |                  |                   |                   |
|         | i |                  |                   |                   |
|         | a |                  |                   |                   |
|         | b |                  |                   |                   |
|         | i |                  |                   |                   |
|         | l |                  |                   |                   |
|         | i |                  |                   |                   |
|         | t |                  |                   |                   |
|         | y |                  |                   |                   |
|         | . |                  |                   |                   |
+---------+---+------------------+-------------------+-------------------+
| From    | T |                  |                   |                   |
|         | h |                  |                   |                   |
| >       | e |                  |                   |                   |
|  QADATA | d |                  |                   |                   |
| >       | a |                  |                   |                   |
| Summary | t |                  |                   |                   |
| > April | a |                  |                   |                   |
| > 2006  | a |                  |                   |                   |
|         | r |                  |                   |                   |
|         | e |                  |                   |                   |
|         | n |                  |                   |                   |
|         | o |                  |                   |                   |
|         | w |                  |                   |                   |
|         | b |                  |                   |                   |
|         | i |                  |                   |                   |
|         | a |                  |                   |                   |
|         | s |                  |                   |                   |
|         | e |                  |                   |                   |
|         | d |                  |                   |                   |
|         | l |                  |                   |                   |
|         | e |                  |                   |                   |
|         | s |                  |                   |                   |
|         | s |                  |                   |                   |
|         | t |                  |                   |                   |
|         | h |                  |                   |                   |
|         | a |                  |                   |                   |
|         | n |                  |                   |                   |
|         | 5 |                  |                   |                   |
|         | % |                  |                   |                   |
|         | f |                  |                   |                   |
|         | r |                  |                   |                   |
|         | o |                  |                   |                   |
|         | m |                  |                   |                   |
|         | t |                  |                   |                   |
|         | h |                  |                   |                   |
|         | e |                  |                   |                   |
|         | i |                  |                   |                   |
|         | r |                  |                   |                   |
|         | t |                  |                   |                   |
|         | a |                  |                   |                   |
|         | r |                  |                   |                   |
|         | g |                  |                   |                   |
|         | e |                  |                   |                   |
|         | t |                  |                   |                   |
|         | v |                  |                   |                   |
|         | a |                  |                   |                   |
|         | l |                  |                   |                   |
|         | u |                  |                   |                   |
|         | e |                  |                   |                   |
|         | . |                  |                   |                   |
|         | H |                  |                   |                   |
|         | o |                  |                   |                   |
|         | w |                  |                   |                   |
|         | e |                  |                   |                   |
|         | v |                  |                   |                   |
|         | e |                  |                   |                   |
|         | r |                  |                   |                   |
|         | , |                  |                   |                   |
|         | t |                  |                   |                   |
|         | h |                  |                   |                   |
|         | r |                  |                   |                   |
|         | e |                  |                   |                   |
|         | e |                  |                   |                   |
|         | o |                  |                   |                   |
|         | u |                  |                   |                   |
|         | t |                  |                   |                   |
|         | o |                  |                   |                   |
|         | f |                  |                   |                   |
|         | t |                  |                   |                   |
|         | h |                  |                   |                   |
|         | e |                  |                   |                   |
|         | l |                  |                   |                   |
|         | a |                  |                   |                   |
|         | s |                  |                   |                   |
|         | t |                  |                   |                   |
|         | 1 |                  |                   |                   |
|         | 3 |                  |                   |                   |
|         | r |                  |                   |                   |
|         | e |                  |                   |                   |
|         | s |                  |                   |                   |
|         | u |                  |                   |                   |
|         | l |                  |                   |                   |
|         | t |                  |                   |                   |
|         | s |                  |                   |                   |
|         | ( |                  |                   |                   |
|         | 2 |                  |                   |                   |
|         | 3 |                  |                   |                   |
|         | % |                  |                   |                   |
|         | ) |                  |                   |                   |
|         | a |                  |                   |                   |
|         | r |                  |                   |                   |
|         | e |                  |                   |                   |
|         | o |                  |                   |                   |
|         | u |                  |                   |                   |
|         | t |                  |                   |                   |
|         | s |                  |                   |                   |
|         | i |                  |                   |                   |
|         | d |                  |                   |                   |
|         | e |                  |                   |                   |
|         | \ |                  |                   |                   |
|         | - |                  |                   |                   |
|         | 2 |                  |                   |                   |
|         | f |                  |                   |                   |
|         | ‑ |                  |                   |                   |
|         | p |                  |                   |                   |
|         | s |                  |                   |                   |
|         | e |                  |                   |                   |
|         | u |                  |                   |                   |
|         | d |                  |                   |                   |
|         | o |                  |                   |                   |
|         | s |                  |                   |                   |
|         | i |                  |                   |                   |
|         | g |                  |                   |                   |
|         | m |                  |                   |                   |
|         | a |                  |                   |                   |
|         | s |                  |                   |                   |
|         | . |                  |                   |                   |
|         |   |                  |                   |                   |
|         | 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 |                  |                   |                   |
|         | t |                  |                   |                   |
|         | o |                  |                   |                   |
|         | r |                  |                   |                   |
|         | e |                  |                   |                   |
|         | 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 |                  |                   |                   |
|         | . |                  |                   |                   |
+---------+---+------------------+-------------------+-------------------+
| From    | A |                  | There was         | We transferred    |
|         | n |                  | increased scatter | the Sr analysis   |
| >       | u |                  | starting in       | to the older      |
|  QADATA | p |                  | October and the   | ICP-MS the week   |
| >       | w |                  | upward trend      | of January 29th   |
| Summary | a |                  | starting in       | and have stopped  |
| > F     | r |                  | December.         | running Sr on the |
| ebruary | d |                  | Starting in Oct.  | new instrument.   |
| > 2006  | t |                  | most of the Sr    | There is not      |
|         | r |                  | results were from | enough data to    |
|         | e |                  | the new ICP-MS.   | see the effect on |
|         | n |                  |                   | the bias. If that |
|         | d |                  |                   | fixes the problem |
|         | i |                  |                   | we will not       |
|         | n |                  |                   | analyze Sr on the |
|         | t |                  |                   | new instrument    |
|         | h |                  |                   | until we          |
|         | e |                  |                   | determine the     |
|         | d |                  |                   | cause of the      |
|         | a |                  |                   | problem and fix   |
|         | t |                  |                   | it.               |
|         | a |                  |                   |                   |
|         | i |                  |                   |                   |
|         | s |                  |                   |                   |
|         | s |                  |                   |                   |
|         | h |                  |                   |                   |
|         | o |                  |                   |                   |
|         | w |                  |                   |                   |
|         | n |                  |                   |                   |
|         | \ |                  |                   |                   |
|         | s |                  |                   |                   |
|         | t |                  |                   |                   |
|         | a |                  |                   |                   |
|         | r |                  |                   |                   |
|         | t |                  |                   |                   |
|         | i |                  |                   |                   |
|         | n |                  |                   |                   |
|         | g |                  |                   |                   |
|         | D |                  |                   |                   |
|         | e |                  |                   |                   |
|         | c |                  |                   |                   |
|         | e |                  |                   |                   |
|         | m |                  |                   |                   |
|         | b |                  |                   |                   |
|         | e |                  |                   |                   |
|         | r |                  |                   |                   |
|         | 2 |                  |                   |                   |
|         | 0 |                  |                   |                   |
|         | 0 |                  |                   |                   |
|         | 5 |                  |                   |                   |
|         | . |                  |                   |                   |
|         | D |                  |                   |                   |
|         | a |                  |                   |                   |
|         | t |                  |                   |                   |
|         | a |                  |                   |                   |
|         | s |                  |                   |                   |
|         | i |                  |                   |                   |
|         | n |                  |                   |                   |
|         | c |                  |                   |                   |
|         | e |                  |                   |                   |
|         | t |                  |                   |                   |
|         | h |                  |                   |                   |
|         | e |                  |                   |                   |
|         | n |                  |                   |                   |
|         | e |                  |                   |                   |
|         | x |                  |                   |                   |
|         | h |                  |                   |                   |
|         | i |                  |                   |                   |
|         | b |                  |                   |                   |
|         | i |                  |                   |                   |
|         | t |                  |                   |                   |
|         | a |                  |                   |                   |
|         | p |                  |                   |                   |
|         | o |                  |                   |                   |
|         | s |                  |                   |                   |
|         | i |                  |                   |                   |
|         | t |                  |                   |                   |
|         | i |                  |                   |                   |
|         | v |                  |                   |                   |
|         | e |                  |                   |                   |
|         | b |                  |                   |                   |
|         | i |                  |                   |                   |
|         | a |                  |                   |                   |
|         | s |                  |                   |                   |
|         | o |                  |                   |                   |
|         | f |                  |                   |                   |
|         | 7 |                  |                   |                   |
|         | . |                  |                   |                   |
|         | 1 |                  |                   |                   |
|         | % |                  |                   |                   |
|         | a |                  |                   |                   |
|         | b |                  |                   |                   |
|         | o |                  |                   |                   |
|         | v |                  |                   |                   |
|         | e |                  |                   |                   |
|         | t |                  |                   |                   |
|         | h |                  |                   |                   |
|         | e |                  |                   |                   |
|         | t |                  |                   |                   |
|         | a |                  |                   |                   |
|         | r |                  |                   |                   |
|         | g |                  |                   |                   |
|         | e |                  |                   |                   |
|         | t |                  |                   |                   |
|         | v |                  |                   |                   |
|         | a |                  |                   |                   |
|         | l |                  |                   |                   |
|         | u |                  |                   |                   |
|         | e |                  |                   |                   |
|         | . |                  |                   |                   |
+---------+---+------------------+-------------------+-------------------+
|         |   |                  |                   |                   |
+---------+---+------------------+-------------------+-------------------+
| [[]{#n  |   | **The data       | **It is suspected | **New calibration |
| wql2390 |   | indicate a       | that the higher   | standards were    |
| .       |   | negative bias.   | calibration       | made in early     |
| anchor} |   | As of April      | standards have    | August. The       |
| **Zinc, |   | 2006, results    | higher            | analytical line   |
| Whol    |   | are on average   | concentrations    | will be monitored |
| e-Water |   | 5.5% below the   | than the target   | to ensure that    |
| Recove  |   | target value.    | values.**         | the new           |
| rable** |   | The magnitude of |                   | calibration       |
| ](http: |   | the negative     |                   | standards have    |
| //bqs.u |   | bias appears to  |                   | corrected the     |
| sgs.gov |   | increase as the  |                   | bias.**           |
| /bsp/QA |   | concentration    |                   |                   |
| DATA_al |   | increases.**     |                   |                   |
| l/06Aug |   |                  |                   |                   |
| /Aug06N |   |                  |                   |                   |
| WQL0109 |   |                  |                   |                   |
| 2D.gif) |   |                  |                   |                   |
| *       |   |                  |                   |                   |
| *ICP-MS |   |                  |                   |                   |
| labcode |   |                  |                   |                   |
| 2390    |   |                  |                   |                   |
| p       |   |                  |                   |                   |
| armcode |   |                  |                   |                   |
| 1092D** |   |                  |                   |                   |
+---------+---+------------------+-------------------+-------------------+
|         |   |                  |                   |                   |
+---------+---+------------------+-------------------+-------------------+

+---------+---+------------------+-------------------+-------------------+
| **Major | * |                  | **NWQL**          | **Corrective**    |
| De      | * |                  |                   |                   |
| termina | P |                  | **Comment**       | **Action**        |
| tions** | r |                  |                   |                   |
|         | o |                  |                   |                   |
|         | b |                  |                   |                   |
|         | l |                  |                   |                   |
|         | e |                  |                   |                   |
|         | m |                  |                   |                   |
|         | * |                  |                   |                   |
|         | * |                  |                   |                   |
+=========+===+==================+===================+===================+
| [[]{#n  |   | **Although a     |                   |                   |
| wql2109 |   | slight positive  |                   |                   |
| .anchor |   | bias is still    |                   |                   |
| }**Alka |   | demonstrated,    |                   |                   |
| linity, |   | all results      |                   |                   |
| Fil     |   | received as of   |                   |                   |
| tered** |   | the last QADATA  |                   |                   |
| ](http: |   | Summary are      |                   |                   |
| //bqs.u |   | within\          |                   |                   |
| sgs.gov |   | +/-1             |                   |                   |
| /bsp/QA |   | f-pseudosigma.** |                   |                   |
| DATA_al |   |                  |                   |                   |
| l/06Aug |   | **Analysis       |                   |                   |
| /Aug06N |   | should be        |                   |                   |
| WQL2980 |   | closely          |                   |                   |
| 1A.gif) |   | monitored until  |                   |                   |
| **Elect |   | the next QADATA  |                   |                   |
| rometry |   | Summary is       |                   |                   |
| labcode |   | distributed.**   |                   |                   |
| 2109    |   |                  |                   |                   |
| p       |   |                  |                   |                   |
| armcode |   |                  |                   |                   |
| 2       |   |                  |                   |                   |
| 9801A** |   |                  |                   |                   |
+---------+---+------------------+-------------------+-------------------+
| *P      |   |                  |                   |                   |
| revious |   |                  |                   |                   |
| c       |   |                  |                   |                   |
| omments |   |                  |                   |                   |
| for     |   |                  |                   |                   |
| alka    |   |                  |                   |                   |
| linity, |   |                  |                   |                   |
| fi      |   |                  |                   |                   |
| ltered, |   |                  |                   |                   |
| electr  |   |                  |                   |                   |
| ometry, |   |                  |                   |                   |
| labcode |   |                  |                   |                   |
| 2109,   |   |                  |                   |                   |
| p       |   |                  |                   |                   |
| armcode |   |                  |                   |                   |
| 29801A* |   |                  |                   |                   |
+---------+---+------------------+-------------------+-------------------+
| From    | T |                  | Use of new        | At this time no   |
|         | h |                  | instrumentation   | corrective action |
| >       | e |                  | was initiated in  | will be taken.    |
|  QADATA | d |                  | July 2005. Prior  | The inflection    |
| >       | a |                  | to the new        | point technique   |
| Summary | t |                  | instrumentation,  | for determining   |
| > June  | a |                  | spike recoveries  | concentration is  |
| > 2006  | i |                  | showed a negative | being             |
|         | n |                  | bias. After the   | investigated for  |
|         | d |                  | new               | use in this       |
|         | i |                  | instrumentation   | method. The       |
|         | c |                  | was initiated the | investigation is  |
|         | a |                  | bias became       | targeted to be    |
|         | t |                  | positive with     | completed by      |
|         | e |                  | decreasing        | October 1, 2006.  |
|         | a |                  | magnitude and     |                   |
|         | p |                  | more scatter.     |                   |
|         | o |                  | Recoveries for    |                   |
|         | s |                  | reference         |                   |
|         | i |                  | material M-152    |                   |
|         | t |                  | (target value =   |                   |
|         | i |                  | 6.00 mg/L) from   |                   |
|         | v |                  | April 2006 to     |                   |
|         | e |                  | present show a    |                   |
|         | b |                  | 0.2% positive     |                   |
|         | i |                  | bias. M-168       |                   |
|         | a |                  | recoveries        |                   |
|         | s |                  | (target value =   |                   |
|         | . |                  | 28.2 mg/L) from   |                   |
|         | R |                  | March to present  |                   |
|         | e |                  | show a 3.4%       |                   |
|         | s |                  | positive bias.    |                   |
|         | u |                  |                   |                   |
|         | l |                  |                   |                   |
|         | t |                  |                   |                   |
|         | s |                  |                   |                   |
|         | f |                  |                   |                   |
|         | r |                  |                   |                   |
|         | o |                  |                   |                   |
|         | m |                  |                   |                   |
|         | s |                  |                   |                   |
|         | a |                  |                   |                   |
|         | m |                  |                   |                   |
|         | p |                  |                   |                   |
|         | l |                  |                   |                   |
|         | e |                  |                   |                   |
|         | s |                  |                   |                   |
|         | a |                  |                   |                   |
|         | n |                  |                   |                   |
|         | a |                  |                   |                   |
|         | l |                  |                   |                   |
|         | y |                  |                   |                   |
|         | z |                  |                   |                   |
|         | e |                  |                   |                   |
|         | d |                  |                   |                   |
|         | a |                  |                   |                   |
|         | s |                  |                   |                   |
|         | o |                  |                   |                   |
|         | f |                  |                   |                   |
|         | N |                  |                   |                   |
|         | o |                  |                   |                   |
|         | v |                  |                   |                   |
|         | e |                  |                   |                   |
|         | m |                  |                   |                   |
|         | b |                  |                   |                   |
|         | e |                  |                   |                   |
|         | r |                  |                   |                   |
|         | 2 |                  |                   |                   |
|         | 0 |                  |                   |                   |
|         | 0 |                  |                   |                   |
|         | 5 |                  |                   |                   |
|         | a |                  |                   |                   |
|         | r |                  |                   |                   |
|         | e |                  |                   |                   |
|         | b |                  |                   |                   |
|         | i |                  |                   |                   |
|         | a |                  |                   |                   |
|         | s |                  |                   |                   |
|         | e |                  |                   |                   |
|         | d |                  |                   |                   |
|         | o |                  |                   |                   |
|         | n |                  |                   |                   |
|         | a |                  |                   |                   |
|         | v |                  |                   |                   |
|         | e |                  |                   |                   |
|         | r |                  |                   |                   |
|         | a |                  |                   |                   |
|         | g |                  |                   |                   |
|         | e |                  |                   |                   |
|         | 7 |                  |                   |                   |
|         | . |                  |                   |                   |
|         | 8 |                  |                   |                   |
|         | % |                  |                   |                   |
|         | a |                  |                   |                   |
|         | b |                  |                   |                   |
|         | o |                  |                   |                   |
|         | v |                  |                   |                   |
|         | e |                  |                   |                   |
|         | t |                  |                   |                   |
|         | h |                  |                   |                   |
|         | e |                  |                   |                   |
|         | t |                  |                   |                   |
|         | a |                  |                   |                   |
|         | r |                  |                   |                   |
|         | g |                  |                   |                   |
|         | e |                  |                   |                   |
|         | t |                  |                   |                   |
|         | v |                  |                   |                   |
|         | a |                  |                   |                   |
|         | l |                  |                   |                   |
|         | u |                  |                   |                   |
|         | e |                  |                   |                   |
|         | . |                  |                   |                   |
+---------+---+------------------+-------------------+-------------------+
|         |   |                  |                   |                   |
+---------+---+------------------+-------------------+-------------------+
| [[]{#n  | * |                  |                   |                   |
| wql0070 | * |                  |                   |                   |
| .anchor | A |                  |                   |                   |
| }**Alka | l |                  |                   |                   |
| linity, | t |                  |                   |                   |
| Whol    | h |                  |                   |                   |
| e-Water | o |                  |                   |                   |
| Recove  | u |                  |                   |                   |
| rable** | g |                  |                   |                   |
| ](http: | h |                  |                   |                   |
| //bqs.u | a |                  |                   |                   |
| sgs.gov | s |                  |                   |                   |
| /bsp/QA | l |                  |                   |                   |
| DATA_al | i |                  |                   |                   |
| l/06Aug | g |                  |                   |                   |
| /Aug06N | h |                  |                   |                   |
| WQL9041 | t |                  |                   |                   |
| 0A.gif) | p |                  |                   |                   |
| **Elect | o |                  |                   |                   |
| rometry | s |                  |                   |                   |
| labcode | i |                  |                   |                   |
| 0070    | t |                  |                   |                   |
| p       | i |                  |                   |                   |
| armcode | v |                  |                   |                   |
| 9       | e |                  |                   |                   |
| 0410A** | b |                  |                   |                   |
|         | i |                  |                   |                   |
|         | a |                  |                   |                   |
|         | s |                  |                   |                   |
|         | i |                  |                   |                   |
|         | s |                  |                   |                   |
|         | s |                  |                   |                   |
|         | t |                  |                   |                   |
|         | i |                  |                   |                   |
|         | l |                  |                   |                   |
|         | l |                  |                   |                   |
|         | d |                  |                   |                   |
|         | e |                  |                   |                   |
|         | m |                  |                   |                   |
|         | o |                  |                   |                   |
|         | n |                  |                   |                   |
|         | s |                  |                   |                   |
|         | t |                  |                   |                   |
|         | r |                  |                   |                   |
|         | a |                  |                   |                   |
|         | t |                  |                   |                   |
|         | e |                  |                   |                   |
|         | d |                  |                   |                   |
|         | , |                  |                   |                   |
|         | a |                  |                   |                   |
|         | l |                  |                   |                   |
|         | l |                  |                   |                   |
|         | r |                  |                   |                   |
|         | e |                  |                   |                   |
|         | s |                  |                   |                   |
|         | u |                  |                   |                   |
|         | l |                  |                   |                   |
|         | t |                  |                   |                   |
|         | s |                  |                   |                   |
|         | r |                  |                   |                   |
|         | e |                  |                   |                   |
|         | c |                  |                   |                   |
|         | e |                  |                   |                   |
|         | i |                  |                   |                   |
|         | v |                  |                   |                   |
|         | e |                  |                   |                   |
|         | d |                  |                   |                   |
|         | a |                  |                   |                   |
|         | s |                  |                   |                   |
|         | o |                  |                   |                   |
|         | f |                  |                   |                   |
|         | t |                  |                   |                   |
|         | h |                  |                   |                   |
|         | e |                  |                   |                   |
|         | l |                  |                   |                   |
|         | a |                  |                   |                   |
|         | s |                  |                   |                   |
|         | t |                  |                   |                   |
|         | Q |                  |                   |                   |
|         | A |                  |                   |                   |
|         | D |                  |                   |                   |
|         | A |                  |                   |                   |
|         | T |                  |                   |                   |
|         | A |                  |                   |                   |
|         | S |                  |                   |                   |
|         | u |                  |                   |                   |
|         | m |                  |                   |                   |
|         | m |                  |                   |                   |
|         | a |                  |                   |                   |
|         | r |                  |                   |                   |
|         | y |                  |                   |                   |
|         | a |                  |                   |                   |
|         | r |                  |                   |                   |
|         | e |                  |                   |                   |
|         | w |                  |                   |                   |
|         | i |                  |                   |                   |
|         | t |                  |                   |                   |
|         | h |                  |                   |                   |
|         | i |                  |                   |                   |
|         | n |                  |                   |                   |
|         | \ |                  |                   |                   |
|         | + |                  |                   |                   |
|         | / |                  |                   |                   |
|         | - |                  |                   |                   |
|         | 1 |                  |                   |                   |
|         | f |                  |                   |                   |
|         | - |                  |                   |                   |
|         | p |                  |                   |                   |
|         | s |                  |                   |                   |
|         | e |                  |                   |                   |
|         | u |                  |                   |                   |
|         | d |                  |                   |                   |
|         | o |                  |                   |                   |
|         | s |                  |                   |                   |
|         | i |                  |                   |                   |
|         | g |                  |                   |                   |
|         | m |                  |                   |                   |
|         | a |                  |                   |                   |
|         | . |                  |                   |                   |
|         | * |                  |                   |                   |
|         | * |                  |                   |                   |
|         |   |                  |                   |                   |
|         | * |                  |                   |                   |
|         | * |                  |                   |                   |
|         | 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 |                  |                   |                   |
|         | t |                  |                   |                   |
|         | o |                  |                   |                   |
|         | r |                  |                   |                   |
|         | e |                  |                   |                   |
|         | 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     |   |                  |                   |                   |
| alka    |   |                  |                   |                   |
| linity, |   |                  |                   |                   |
| whol    |   |                  |                   |                   |
| e-water |   |                  |                   |                   |
| recov   |   |                  |                   |                   |
| erable, |   |                  |                   |                   |
| electr  |   |                  |                   |                   |
| ometry, |   |                  |                   |                   |
| labcode |   |                  |                   |                   |
| 0070,   |   |                  |                   |                   |
| p       |   |                  |                   |                   |
| armcode |   |                  |                   |                   |
| 90410A* |   |                  |                   |                   |
+---------+---+------------------+-------------------+-------------------+
| From    | T |                  | Use of new        | At this time no   |
|         | h |                  | instrumentation   | corrective action |
| >       | e |                  | was initiated in  | will be taken.    |
|  QADATA | d |                  | July 2005. Prior  | The inflection    |
| >       | a |                  | to the new        | point technique   |
| Summary | t |                  | instrumentation,  | for determining   |
| > June  | a |                  | spike recoveries  | concentration is  |
| > 2006  | i |                  | showed a negative | being             |
|         | n |                  | bias. After the   | investigated for  |
|         | d |                  | new               | use in this       |
|         | i |                  | instrumentation   | method. The       |
|         | c |                  | was initiated the | investigation is  |
|         | a |                  | bias became       | targeted to be    |
|         | t |                  | positive with     | completed by      |
|         | e |                  | decreasing        | October 1, 2006.  |
|         | a |                  | magnitude and     |                   |
|         | p |                  | more scatter.     |                   |
|         | o |                  | Recoveries for    |                   |
|         | s |                  | reference         |                   |
|         | i |                  | material M-152    |                   |
|         | t |                  | (target value =   |                   |
|         | i |                  | 6.00 mg/L) from   |                   |
|         | v |                  | April 2006 to     |                   |
|         | e |                  | present show a    |                   |
|         | b |                  | 0.2% positive     |                   |
|         | i |                  | bias. M-168       |                   |
|         | a |                  | recoveries        |                   |
|         | s |                  | (target value =   |                   |
|         | . |                  | 28.2 mg/L) from   |                   |
|         | R |                  | March to present  |                   |
|         | e |                  | show a 3.4%       |                   |
|         | s |                  | positive bias.    |                   |
|         | u |                  |                   |                   |
|         | l |                  |                   |                   |
|         | t |                  |                   |                   |
|         | s |                  |                   |                   |
|         | f |                  |                   |                   |
|         | r |                  |                   |                   |
|         | o |                  |                   |                   |
|         | m |                  |                   |                   |
|         | s |                  |                   |                   |
|         | a |                  |                   |                   |
|         | m |                  |                   |                   |
|         | p |                  |                   |                   |
|         | l |                  |                   |                   |
|         | e |                  |                   |                   |
|         | s |                  |                   |                   |
|         | a |                  |                   |                   |
|         | n |                  |                   |                   |
|         | a |                  |                   |                   |
|         | l |                  |                   |                   |
|         | y |                  |                   |                   |
|         | z |                  |                   |                   |
|         | e |                  |                   |                   |
|         | d |                  |                   |                   |
|         | a |                  |                   |                   |
|         | s |                  |                   |                   |
|         | o |                  |                   |                   |
|         | f |                  |                   |                   |
|         | N |                  |                   |                   |
|         | o |                  |                   |                   |
|         | v |                  |                   |                   |
|         | e |                  |                   |                   |
|         | m |                  |                   |                   |
|         | b |                  |                   |                   |
|         | e |                  |                   |                   |
|         | r |                  |                   |                   |
|         | 2 |                  |                   |                   |
|         | 0 |                  |                   |                   |
|         | 0 |                  |                   |                   |
|         | 5 |                  |                   |                   |
|         | a |                  |                   |                   |
|         | r |                  |                   |                   |
|         | e |                  |                   |                   |
|         | b |                  |                   |                   |
|         | i |                  |                   |                   |
|         | a |                  |                   |                   |
|         | s |                  |                   |                   |
|         | e |                  |                   |                   |
|         | d |                  |                   |                   |
|         | o |                  |                   |                   |
|         | n |                  |                   |                   |
|         | a |                  |                   |                   |
|         | v |                  |                   |                   |
|         | e |                  |                   |                   |
|         | r |                  |                   |                   |
|         | a |                  |                   |                   |
|         | g |                  |                   |                   |
|         | e |                  |                   |                   |
|         | 7 |                  |                   |                   |
|         | . |                  |                   |                   |
|         | 5 |                  |                   |                   |
|         | % |                  |                   |                   |
|         | a |                  |                   |                   |
|         | b |                  |                   |                   |
|         | o |                  |                   |                   |
|         | v |                  |                   |                   |
|         | e |                  |                   |                   |
|         | t |                  |                   |                   |
|         | h |                  |                   |                   |
|         | e |                  |                   |                   |
|         | t |                  |                   |                   |
|         | a |                  |                   |                   |
|         | r |                  |                   |                   |
|         | g |                  |                   |                   |
|         | e |                  |                   |                   |
|         | t |                  |                   |                   |
|         | v |                  |                   |                   |
|         | a |                  |                   |                   |
|         | l |                  |                   |                   |
|         | u |                  |                   |                   |
|         | e |                  |                   |                   |
|         | . |                  |                   |                   |
+---------+---+------------------+-------------------+-------------------+
|         |   |                  |                   |                   |
+---------+---+------------------+-------------------+-------------------+
| [[]{#n  | * |                  |                   |                   |
| wql0031 | * |                  |                   |                   |
| .anch   | A |                  |                   |                   |
| or}**Fl | l |                  |                   |                   |
| uoride, | t |                  |                   |                   |
| Filter  | h |                  |                   |                   |
| ed**](h | o |                  |                   |                   |
| ttp://b | u |                  |                   |                   |
| qs.usgs | g |                  |                   |                   |
| .gov/bs | h |                  |                   |                   |
| p/QADAT | a |                  |                   |                   |
| A_all/0 | s |                  |                   |                   |
| 6Aug/Au | l |                  |                   |                   |
| g06NWQL | i |                  |                   |                   |
| 00950B. | g |                  |                   |                   |
| gif)**\ | h |                  |                   |                   |
| ISE     | t |                  |                   |                   |
| labcode | p |                  |                   |                   |
| 0031    | o |                  |                   |                   |
| p       | s |                  |                   |                   |
| armcode | i |                  |                   |                   |
| 0950B** | t |                  |                   |                   |
|         | i |                  |                   |                   |
|         | v |                  |                   |                   |
|         | e |                  |                   |                   |
|         | b |                  |                   |                   |
|         | i |                  |                   |                   |
|         | a |                  |                   |                   |
|         | s |                  |                   |                   |
|         | i |                  |                   |                   |
|         | s |                  |                   |                   |
|         | s |                  |                   |                   |
|         | t |                  |                   |                   |
|         | i |                  |                   |                   |
|         | l |                  |                   |                   |
|         | l |                  |                   |                   |
|         | d |                  |                   |                   |
|         | e |                  |                   |                   |
|         | m |                  |                   |                   |
|         | o |                  |                   |                   |
|         | n |                  |                   |                   |
|         | s |                  |                   |                   |
|         | t |                  |                   |                   |
|         | r |                  |                   |                   |
|         | a |                  |                   |                   |
|         | t |                  |                   |                   |
|         | e |                  |                   |                   |
|         | d |                  |                   |                   |
|         | , |                  |                   |                   |
|         | m |                  |                   |                   |
|         | o |                  |                   |                   |
|         | s |                  |                   |                   |
|         | t |                  |                   |                   |
|         | r |                  |                   |                   |
|         | e |                  |                   |                   |
|         | s |                  |                   |                   |
|         | u |                  |                   |                   |
|         | l |                  |                   |                   |
|         | t |                  |                   |                   |
|         | s |                  |                   |                   |
|         | r |                  |                   |                   |
|         | e |                  |                   |                   |
|         | c |                  |                   |                   |
|         | e |                  |                   |                   |
|         | i |                  |                   |                   |
|         | v |                  |                   |                   |
|         | e |                  |                   |                   |
|         | d |                  |                   |                   |
|         | a |                  |                   |                   |
|         | s |                  |                   |                   |
|         | o |                  |                   |                   |
|         | f |                  |                   |                   |
|         | J |                  |                   |                   |
|         | u |                  |                   |                   |
|         | n |                  |                   |                   |
|         | e |                  |                   |                   |
|         | 2 |                  |                   |                   |
|         | 0 |                  |                   |                   |
|         | 0 |                  |                   |                   |
|         | 6 |                  |                   |                   |
|         | a |                  |                   |                   |
|         | r |                  |                   |                   |
|         | e |                  |                   |                   |
|         | w |                  |                   |                   |
|         | i |                  |                   |                   |
|         | t |                  |                   |                   |
|         | h |                  |                   |                   |
|         | i |                  |                   |                   |
|         | n |                  |                   |                   |
|         | + |                  |                   |                   |
|         | / |                  |                   |                   |
|         | - |                  |                   |                   |
|         | 1 |                  |                   |                   |
|         | f |                  |                   |                   |
|         | - |                  |                   |                   |
|         | p |                  |                   |                   |
|         | s |                  |                   |                   |
|         | e |                  |                   |                   |
|         | u |                  |                   |                   |
|         | d |                  |                   |                   |
|         | o |                  |                   |                   |
|         | s |                  |                   |                   |
|         | i |                  |                   |                   |
|         | g |                  |                   |                   |
|         | m |                  |                   |                   |
|         | a |                  |                   |                   |
|         | . |                  |                   |                   |
|         | * |                  |                   |                   |
|         | * |                  |                   |                   |
|         |   |                  |                   |                   |
|         | * |                  |                   |                   |
|         | * |                  |                   |                   |
|         | 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 |                  |                   |                   |
|         | t |                  |                   |                   |
|         | o |                  |                   |                   |
|         | r |                  |                   |                   |
|         | e |                  |                   |                   |
|         | 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     |   |                  |                   |                   |
| fl      |   |                  |                   |                   |
| uoride, |   |                  |                   |                   |
| fi      |   |                  |                   |                   |
| ltered, |   |                  |                   |                   |
| ISE,    |   |                  |                   |                   |
| labcode |   |                  |                   |                   |
| 0031,   |   |                  |                   |                   |
| p       |   |                  |                   |                   |
| armcode |   |                  |                   |                   |
| 0950B*  |   |                  |                   |                   |
+---------+---+------------------+-------------------+-------------------+
| From    | T |                  | The upward shift  | The high bias     |
|         | h |                  | in bias seen in   | evident in April  |
| >       | e |                  | the BQS charts    | seems to have     |
|  QADATA | d |                  | was not evident   | diminished. The   |
| >       | a |                  | in the online QC  | Nutrient Unit     |
| Summary | t |                  | charts for the    | will closely      |
| > June  | a |                  | months of April   | monitor line      |
| > 2006  | e |                  | and May. The      | performance and   |
|         | x |                  | analytical        | BQS charts to see |
|         | h |                  | system, however,  | what effect the   |
|         | i |                  | has been          | change of         |
|         | b |                  | thoroughly        | electrodes has    |
|         | i |                  | cleaned several   | made. If          |
|         | t |                  | times and all     | necessary, new    |
|         | a |                  | pump tubing       | standards will be |
|         | m |                  | replaced. A new   | made.             |
|         | a |                  | reference and     |                   |
|         | r |                  | fluoride          |                   |
|         | k |                  | electrode were    |                   |
|         | e |                  | installed on May  |                   |
|         | d |                  | 17.               |                   |
|         | u |                  |                   |                   |
|         | p |                  |                   |                   |
|         | w |                  |                   |                   |
|         | a |                  |                   |                   |
|         | r |                  |                   |                   |
|         | d |                  |                   |                   |
|         | s |                  |                   |                   |
|         | h |                  |                   |                   |
|         | i |                  |                   |                   |
|         | f |                  |                   |                   |
|         | t |                  |                   |                   |
|         | s |                  |                   |                   |
|         | t |                  |                   |                   |
|         | a |                  |                   |                   |
|         | r |                  |                   |                   |
|         | t |                  |                   |                   |
|         | i |                  |                   |                   |
|         | n |                  |                   |                   |
|         | g |                  |                   |                   |
|         | A |                  |                   |                   |
|         | p |                  |                   |                   |
|         | r |                  |                   |                   |
|         | i |                  |                   |                   |
|         | l |                  |                   |                   |
|         | 2 |                  |                   |                   |
|         | 0 |                  |                   |                   |
|         | 0 |                  |                   |                   |
|         | 6 |                  |                   |                   |
|         | w |                  |                   |                   |
|         | i |                  |                   |                   |
|         | t |                  |                   |                   |
|         | h |                  |                   |                   |
|         | s |                  |                   |                   |
|         | o |                  |                   |                   |
|         | m |                  |                   |                   |
|         | e |                  |                   |                   |
|         | i |                  |                   |                   |
|         | m |                  |                   |                   |
|         | p |                  |                   |                   |
|         | r |                  |                   |                   |
|         | o |                  |                   |                   |
|         | v |                  |                   |                   |
|         | e |                  |                   |                   |
|         | m |                  |                   |                   |
|         | e |                  |                   |                   |
|         | n |                  |                   |                   |
|         | t |                  |                   |                   |
|         | s |                  |                   |                   |
|         | h |                  |                   |                   |
|         | o |                  |                   |                   |
|         | w |                  |                   |                   |
|         | n |                  |                   |                   |
|         | i |                  |                   |                   |
|         | n |                  |                   |                   |
|         | M |                  |                   |                   |
|         | a |                  |                   |                   |
|         | y |                  |                   |                   |
|         | . |                  |                   |                   |
|         | R |                  |                   |                   |
|         | e |                  |                   |                   |
|         | s |                  |                   |                   |
|         | u |                  |                   |                   |
|         | l |                  |                   |                   |
|         | t |                  |                   |                   |
|         | s |                  |                   |                   |
|         | f |                  |                   |                   |
|         | r |                  |                   |                   |
|         | o |                  |                   |                   |
|         | m |                  |                   |                   |
|         | s |                  |                   |                   |
|         | a |                  |                   |                   |
|         | m |                  |                   |                   |
|         | p |                  |                   |                   |
|         | l |                  |                   |                   |
|         | e |                  |                   |                   |
|         | s |                  |                   |                   |
|         | a |                  |                   |                   |
|         | n |                  |                   |                   |
|         | a |                  |                   |                   |
|         | l |                  |                   |                   |
|         | y |                  |                   |                   |
|         | z |                  |                   |                   |
|         | e |                  |                   |                   |
|         | d |                  |                   |                   |
|         | a |                  |                   |                   |
|         | s |                  |                   |                   |
|         | A |                  |                   |                   |
|         | p |                  |                   |                   |
|         | r |                  |                   |                   |
|         | i |                  |                   |                   |
|         | l |                  |                   |                   |
|         | a |                  |                   |                   |
|         | r |                  |                   |                   |
|         | e |                  |                   |                   |
|         | b |                  |                   |                   |
|         | i |                  |                   |                   |
|         | a |                  |                   |                   |
|         | s |                  |                   |                   |
|         | e |                  |                   |                   |
|         | d |                  |                   |                   |
|         | o |                  |                   |                   |
|         | n |                  |                   |                   |
|         | a |                  |                   |                   |
|         | v |                  |                   |                   |
|         | e |                  |                   |                   |
|         | r |                  |                   |                   |
|         | a |                  |                   |                   |
|         | g |                  |                   |                   |
|         | e |                  |                   |                   |
|         | 1 |                  |                   |                   |
|         | 8 |                  |                   |                   |
|         | % |                  |                   |                   |
|         | a |                  |                   |                   |
|         | b |                  |                   |                   |
|         | o |                  |                   |                   |
|         | v |                  |                   |                   |
|         | e |                  |                   |                   |
|         | t |                  |                   |                   |
|         | h |                  |                   |                   |
|         | e |                  |                   |                   |
|         | t |                  |                   |                   |
|         | a |                  |                   |                   |
|         | r |                  |                   |                   |
|         | g |                  |                   |                   |
|         | e |                  |                   |                   |
|         | t |                  |                   |                   |
|         | v |                  |                   |                   |
|         | a |                  |                   |                   |
|         | l |                  |                   |                   |
|         | u |                  |                   |                   |
|         | e |                  |                   |                   |
|         | . |                  |                   |                   |
+---------+---+------------------+-------------------+-------------------+
|         |   |                  |                   |                   |
+---------+---+------------------+-------------------+-------------------+

######