##### QADATA Summary -- June 2008

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

The data reviewed in this summary is for the time period 11/01/07
through 05/29/08; however, longer-range charts may be used when they add
clarity to the problem. The attached quality-control charts contain data
from samples that have been subject to the same laboratory handling
procedures as the samples submitted by the USGS 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 the IBSP and
then sent to the NWQL. The NWQL then gets two weeks to respond to the
issue by writing an "NWQL Comment" and a "Corrective Action." Comments
from the 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 on how the corrective
actions are affecting subsequent data.

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

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

*Tedmund M. Struzeski*

<struzesk@usgs.gov>

Table of Contents

Report Highlights Page

[One-Page Summary](#Highlights) 3

Detailed Description by Analyte

Trace Metals

[Boron, Filtered,](#nwql2504) ICP-MS, Labcode 2504, Parmcode 01020PLM40
4

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

[Uranium, Filtered,](#nwql1797) ICP-MS, Labcode 1797, Parmcode
22703PLM43 5

[Vanadium, Unfiltered,](#nwql3134) cICP-MS, Labcode 3135, Parmcode
01087PLM10 5

[Vanadium, Unfiltered,](#nwql2370) ICP, Labcode 2370, Parmcode
01087PLM15 5

[Zinc, Filtered,](#nwql3138) cICP-MS, Labcode 3138, Parmcode 01090PLM10
6

Majors

[Carbon, Total Organic,](#nwql0114) UV, Labcode 0114, Parmcode 0680OX009
8

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

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

1.  [Iron,](http://bqs.usgs.gov/bsp/QADATA_all/08Jun/Jun08NWQL01046PLA11.gif)
    filtered, ICP, parmcode 1046PLA11-- Sharp downward trend and
    increased variability starting late February 2008.

2.  [Vanadium,](http://bqs.usgs.gov/bsp/QADATA_all/08Jun/Jun08BBP_VU_01087PLM10.xls)
    unfiltered, cICP-MS, parmcode 01087PLM10 -- Blind blanks demonstrate
    65% false positive rate starting November 2007.

3.  [Vanadium,](http://bqs.usgs.gov/bsp/QADATA_all/08Jun/Jun08BBP_VU_01087PLM15.xls)
    unfiltered, ICP, parmcode 01087PLM15 -- Blind blanks show 24% false
    positive rate starting mid November 2007.

4.  [Zinc,](http://bqs.usgs.gov/bsp/QADATA_all/08Jun/Jun08NWQL01090PLM10.gif)
    filtered, cICP-MS, parmcode 01090PLM10 -- Positive bias for more
    than 16 months. Current bias is 11%.

NWQL PERFORMANCE ON IBSP SAMPLES

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

+---------+---+------------------+-------------------+-------------------+
| **Trace | * |                  | **NWQL Comment**  | **Corrective      |
| Metal   | * |                  |                   | Action**          |
| De      | P |                  |                   |                   |
| termina | r |                  |                   |                   |
| tions** | o |                  |                   |                   |
|         | b |                  |                   |                   |
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|         | e |                  |                   |                   |
|         | m |                  |                   |                   |
|         | * |                  |                   |                   |
|         | * |                  |                   |                   |
+=========+===+==================+===================+===================+
| [[]{#n  | * |                  | []{.mark}         | **We will         |
| wql2504 | * |                  |                   | continue to       |
| .a      | C |                  |                   | closely monitor   |
| nchor}* | o |                  |                   | this analysis.**  |
| *Boron, | r |                  |                   |                   |
| Filtere | r |                  |                   |                   |
| d**](ht | e |                  |                   |                   |
| tp://bq | c |                  |                   |                   |
| s.usgs. | t |                  |                   |                   |
| gov/bsp | i |                  |                   |                   |
| /QADATA | v |                  |                   |                   |
| _all/08 | e |                  |                   |                   |
| Jun/Jun | a |                  |                   |                   |
| 08NWQL0 | c |                  |                   |                   |
| 1020PLM | t |                  |                   |                   |
| 40.gif) | i |                  |                   |                   |
| *       | o |                  |                   |                   |
| *ICP-MS | n |                  |                   |                   |
| labcode | s |                  |                   |                   |
| 2504    | t |                  |                   |                   |
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| armcode | k |                  |                   |                   |
| 1020    | e |                  |                   |                   |
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+---------+---+------------------+-------------------+-------------------+
| *P      |   |                  |                   |                   |
| revious |   |                  |                   |                   |
| c       |   |                  |                   |                   |
| omments |   |                  |                   |                   |
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| p       |   |                  |                   |                   |
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| 0102    |   |                  |                   |                   |
| 0PLM40* |   |                  |                   |                   |
+---------+---+------------------+-------------------+-------------------+
| From    | A |                  | The analyst was   | Maintenance has   |
|         | n |                  | aware of these    | been performed    |
| QADATA  | e |                  | issues and has    | and new standards |
| Summary | g |                  | performed         | were made. The    |
| April   | a |                  | extensive         | line will be      |
| 2008    | t |                  | maintenance and   | monitored.        |
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|         | v |                  | standards. The    |                   |
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+---------+---+------------------+-------------------+-------------------+
| []      |   |                  |                   |                   |
| {.mark} |   |                  |                   |                   |
+---------+---+------------------+-------------------+-------------------+
| [[]{#n  | * |                  | **On-line charts  | **We will dilute  |
| wql0645 | * |                  | do not show this  | one of our        |
| .       | R |                  | trend, but the    | third-party-check |
| anchor} | e |                  | references used   | samples to match  |
| **Iron, | s |                  | are at higher     | the               |
| Filtere | u |                  | concentrations    | concentrations    |
| d**](ht | l |                  | than those used   | commonly found in |
| tp://bq | t |                  | by BQS.**         | the BQS check     |
| s.usgs. | s |                  |                   | samples and       |
| gov/bsp | r |                  |                   | perform multiple  |
| /QADATA | e |                  |                   | analyses for      |
| _all/08 | c |                  |                   | comparison. We    |
| Jun/Jun | e |                  |                   | will also check   |
| 08NWQL0 | i |                  |                   | our calibration   |
| 1046PLA | v |                  |                   | standards by a    |
| 11.gif) | e |                  |                   | different         |
| **ICP   | d |                  |                   | analytical        |
| labcode | s |                  |                   | method. Outcomes  |
| 0645    | i |                  |                   | of these tests    |
| p       | n |                  |                   | will determine    |
| armcode | c |                  |                   | our next steps.** |
| 1046    | e |                  |                   |                   |
| PLA11** | t |                  |                   |                   |
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+---------+---+------------------+-------------------+-------------------+
|         |   |                  |                   |                   |
+---------+---+------------------+-------------------+-------------------+
| [[]{#n  | * |                  | **On-line charts  | **New standards   |
| wql1797 | * |                  | show the same     | have been made    |
| .anc    | T |                  | trend and the     | and the analysis  |
| hor}**U | h |                  | analyst has       | will be monitored |
| ranium, | e |                  | already made new  | to ensure that    |
| Filtere | d |                  | calibration       | the noted bias    |
| d**](ht | a |                  | standards that    | has been          |
| tp://bq | t |                  | appear to have    | corrected.**      |
| s.usgs. | a |                  | corrected this    |                   |
| gov/bsp | d |                  | slight bias.**    |                   |
| /QADATA | e |                  |                   |                   |
| _all/08 | m |                  |                   |                   |
| Jun/Jun | o |                  |                   |                   |
| 08NWQL2 | n |                  |                   |                   |
| 2703PLM | s |                  |                   |                   |
| 43.gif) | t |                  |                   |                   |
| *       | r |                  |                   |                   |
| *ICP-MS | a |                  |                   |                   |
| labcode | t |                  |                   |                   |
| 1797    | e |                  |                   |                   |
| p       | a |                  |                   |                   |
| armcode | s |                  |                   |                   |
| 22703   | l |                  |                   |                   |
| PLM43** | i |                  |                   |                   |
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|         | * |                  |                   |                   |
|         | * |                  |                   |                   |
+---------+---+------------------+-------------------+-------------------+
|         |   |                  |                   |                   |
+---------+---+------------------+-------------------+-------------------+
| [[]{#n  | * |                  | **After           | **IRL will be     |
| wql3134 | * |                  | consultation with | changed to 0.5    |
| .anch   | T |                  | the BQS the       | ug/L**            |
| or}**Va | h |                  | Interim Reporting |                   |
| nadium, | e |                  | Level for this    |                   |
| Unfil   | h |                  | analysis will be  |                   |
| tered** | i |                  | changed to 0.5    |                   |
| ](http: | g |                  | ug/L to more      |                   |
| //bqs.u | h |                  | accurately        |                   |
| sgs.gov | v |                  | reflect actual    |                   |
| /bsp/QA | a |                  | performance.**    |                   |
| DATA_al | r |                  |                   |                   |
| l/08Jun | i |                  |                   |                   |
| /Jun08B | a |                  |                   |                   |
| BP_VU_0 | b |                  |                   |                   |
| 1087PLM | i |                  |                   |                   |
| 10.xls) | l |                  |                   |                   |
| **      | i |                  |                   |                   |
| cICP-MS | t |                  |                   |                   |
| labcode | y |                  |                   |                   |
| 3135    | a |                  |                   |                   |
| p       | n |                  |                   |                   |
| armcode | d |                  |                   |                   |
| 01087   | p |                  |                   |                   |
| PLM10** | o |                  |                   |                   |
|         | s |                  |                   |                   |
|         | i |                  |                   |                   |
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|         | * |                  |                   |                   |
|         | * |                  |                   |                   |
+---------+---+------------------+-------------------+-------------------+
| *P      |   |                  |                   |                   |
| revious |   |                  |                   |                   |
| c       |   |                  |                   |                   |
| omments |   |                  |                   |                   |
| for     |   |                  |                   |                   |
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| nadium, |   |                  |                   |                   |
| unfi    |   |                  |                   |                   |
| ltered, |   |                  |                   |                   |
| labcode |   |                  |                   |                   |
| 3135,   |   |                  |                   |                   |
| p       |   |                  |                   |                   |
| armcode |   |                  |                   |                   |
| 0108    |   |                  |                   |                   |
| 7PLM10* |   |                  |                   |                   |
+---------+---+------------------+-------------------+-------------------+
| From    | H |                  | The IRL of 0.1    | We will work with |
|         | i |                  | ug/L was an       | BQS to evaluate   |
| QADATA  | g |                  | estimate when the | the IRL and       |
| Summary | h |                  | analytical system | change it if      |
| April   | v |                  | was put on-line   | appropriate.      |
| 2008    | a |                  | in September of   |                   |
|         | r |                  | 2006 and most     |                   |
|         | i |                  | likely incorrect. |                   |
|         | a |                  | This IRL may need |                   |
|         | b |                  | to be raised.     |                   |
|         | i |                  |                   |                   |
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+---------+---+------------------+-------------------+-------------------+
| From    | H |                  | We are seeing     | We will monitor   |
|         | i |                  | this with our     | the instrument    |
| QADATA  | g |                  | blanks as well.   | closely after the |
| Summary | h |                  | We believe that   | maintenance and   |
| F       | v |                  | the variability   | take appropriate  |
| ebruary | a |                  | is instrumental   | steps based on    |
| 2008    | r |                  | and have          | the information   |
|         | i |                  | contacted the     | gathered at that  |
|         | a |                  | manufacturer to   | time.             |
|         | b |                  | have maintenance  |                   |
|         | i |                  | performed. If the |                   |
|         | l |                  | variability is    |                   |
|         | i |                  | related to the    |                   |
|         | t |                  | instrument aging, |                   |
|         | y |                  | we may need to    |                   |
|         | a |                  | raise the IRL for |                   |
|         | n |                  | this element.     |                   |
|         | d |                  |                   |                   |
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+---------+---+------------------+-------------------+-------------------+
|         |   |                  |                   |                   |
+---------+---+------------------+-------------------+-------------------+
| [[]{#n  | * |                  | **In November of  | **We will contact |
| wql2370 | * |                  | 2007 periodic     | the service       |
| .anch   | A |                  | maintenance was   | representative    |
| or}**Va | l |                  | performed and a   | for assistance.** |
| nadium, | t |                  | number of         |                   |
| Unfil   | h |                  | adjustments were  |                   |
| tered** | o |                  | made, including   |                   |
| ](http: | u |                  | rebuilding the    |                   |
| //bqs.u | g |                  | torch. It is      |                   |
| sgs.gov | h |                  | possible that the |                   |
| /bsp/QA | t |                  | PM caused a       |                   |
| DATA_al | h |                  | change in the     |                   |
| l/08Jun | e |                  | ability to        |                   |
| /Jun08B | v |                  | analyze for       |                   |
| BP_VU_0 | a |                  | vanadium.**       |                   |
| 1087PLM | r |                  |                   |                   |
| 15.xls) | i |                  |                   |                   |
| **ICP   | a |                  |                   |                   |
| labcode | b |                  |                   |                   |
| 2370    | i |                  |                   |                   |
| p       | l |                  |                   |                   |
| armcode | i |                  |                   |                   |
| 01087   | t |                  |                   |                   |
| PLM15** | y |                  |                   |                   |
|         | f |                  |                   |                   |
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|         | t |                  |                   |                   |
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|         | N |                  |                   |                   |
|         | o |                  |                   |                   |
|         | v |                  |                   |                   |
|         | e |                  |                   |                   |
|         | m |                  |                   |                   |
|         | b |                  |                   |                   |
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|         | r |                  |                   |                   |
|         | 2 |                  |                   |                   |
|         | 0 |                  |                   |                   |
|         | 0 |                  |                   |                   |
|         | 7 |                  |                   |                   |
|         | . |                  |                   |                   |
|         | * |                  |                   |                   |
|         | * |                  |                   |                   |
+---------+---+------------------+-------------------+-------------------+
| *P      |   |                  |                   |                   |
| revious |   |                  |                   |                   |
| c       |   |                  |                   |                   |
| omments |   |                  |                   |                   |
| for     |   |                  |                   |                   |
| va      |   |                  |                   |                   |
| nadium, |   |                  |                   |                   |
| unfi    |   |                  |                   |                   |
| ltered, |   |                  |                   |                   |
| labcode |   |                  |                   |                   |
| 2370,   |   |                  |                   |                   |
| p       |   |                  |                   |                   |
| armcode |   |                  |                   |                   |
| 0108    |   |                  |                   |                   |
| 7PLM15* |   |                  |                   |                   |
+---------+---+------------------+-------------------+-------------------+
| From    | S |                  | On-line blanks    | We will review    |
|         | i |                  | show no change,   | the sample        |
| QADATA  | n |                  | but we will       | digestion and     |
| Summary | c |                  | review the sample | analysis          |
| April   | e |                  | digestion and     | processes to look |
| 2008    | m |                  | analysis          | for possible      |
|         | i |                  | processes to look | causes and we     |
|         | d |                  | for possible      | will continue to  |
|         | N |                  | causes for the    | monitor this      |
|         | o |                  | change in the     | analysis.         |
|         | v |                  | blind-blank       |                   |
|         | e |                  | results.          |                   |
|         | m |                  |                   |                   |
|         | b |                  | []{.mark}         |                   |
|         | e |                  |                   |                   |
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|         | 2 |                  |                   |                   |
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|         | o |                  |                   |                   |
|         | N |                  |                   |                   |
|         | o |                  |                   |                   |
|         | v |                  |                   |                   |
|         | e |                  |                   |                   |
|         | m |                  |                   |                   |
|         | b |                  |                   |                   |
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|         | 2 |                  |                   |                   |
|         | 0 |                  |                   |                   |
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|         | 7 |                  |                   |                   |
|         | . |                  |                   |                   |
+---------+---+------------------+-------------------+-------------------+
| []      |   |                  |                   |                   |
| {.mark} |   |                  |                   |                   |
+---------+---+------------------+-------------------+-------------------+
| [[]{#n  |   | ***This method   | **On-line         | **We will         |
| wql3138 |   | has demonstrated | third-party-check | purchase a NIST   |
| .       |   | a positive bias  | samples show a    | traceable         |
| anchor} |   | for over 16      | slight low bias.  | standard from a   |
| **Zinc, |   | months.*         | Blind blanks and  | different vendor  |
| Filtere |   | Although the     | on-line blanks do | and test BQS      |
| d**](ht |   | positive bias    | not show any      | samples and the   |
| tp://bq |   | has slightly     | bias.**           | current on-line   |
| s.usgs. |   | improved, the    |                   | check samples to  |
| gov/bsp |   | variability has  |                   | determine where   |
| /QADATA |   | increased since  |                   | the discrepancy   |
| _all/08 |   | the last         |                   | is.**             |
| Jun/Jun |   | assessment.      |                   |                   |
| 08NWQL0 |   | Since the last   |                   |                   |
| 1090PLM |   | assessment, four |                   |                   |
| 10.gif) |   | out of the last  |                   |                   |
| **      |   | 28 results (14%) |                   |                   |
| cICP-MS |   | are outside of   |                   |                   |
| labcode |   | control limits.  |                   |                   |
| 3138    |   | The overall      |                   |                   |
| p       |   | positive bias is |                   |                   |
| armcode |   | 11%.**           |                   |                   |
| 01090   |   |                  |                   |                   |
| PLM10** |   | **Results for    |                   |                   |
|         |   | unfiltered zinc  |                   |                   |
|         |   | by cICP-MS ([pc  |                   |                   |
|         |   | 1092PLM10)](h    |                   |                   |
|         |   | ttp://bqs.usgs.g |                   |                   |
|         |   | ov/bsp/QADATA_al |                   |                   |
|         |   | l/08Jun/Jun08NWQ |                   |                   |
|         |   | L01092PLM10.gif) |                   |                   |
|         |   | are not          |                   |                   |
|         |   | exhibiting this  |                   |                   |
|         |   | bias.**          |                   |                   |
+---------+---+------------------+-------------------+-------------------+
| *P      |   |                  |                   |                   |
| revious |   |                  |                   |                   |
| c       |   |                  |                   |                   |
| omments |   |                  |                   |                   |
| for     |   |                  |                   |                   |
| zinc,   |   |                  |                   |                   |
| fi      |   |                  |                   |                   |
| ltered, |   |                  |                   |                   |
| labcode |   |                  |                   |                   |
| 3138,   |   |                  |                   |                   |
| p       |   |                  |                   |                   |
| armcode |   |                  |                   |                   |
| 0109    |   |                  |                   |                   |
| 0PLM10* |   |                  |                   |                   |
+---------+---+------------------+-------------------+-------------------+
| From    | T |                  | On-line charts    | We will continue  |
|         | h |                  | show similar      | to monitor this   |
| QADATA  | e |                  | improvement.      | line to ensure    |
| Summary | p |                  |                   | that the          |
| April   | o |                  |                   | improvement       |
| 2008    | s |                  |                   | continues.        |
|         | i |                  |                   |                   |
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+---------+---+------------------+-------------------+-------------------+
| From    | T |                  | We have looked at | It will take 2-3  |
|         | h |                  | a number of       | more weeks of     |
| QADATA  | e |                  | possible causes,  | data to ensure    |
| Summary | p |                  | but none of the   | that this         |
| F       | o |                  | attempted         | solution is       |
| ebruary | s |                  | corrections has   | working. We will  |
| 2008    | i |                  | been proven to    | continue to       |
|         | t |                  | correct the issue | monitor this line |
|         | i |                  | yet. The most     | closely and if    |
|         | v |                  | recent            | the line is still |
|         | e |                  | modification to   | having problems   |
|         | b |                  | the calibration   | we will request   |
|         | i |                  | procedure is      | input from the    |
|         | a |                  | showing promise,  | Quality Assurance |
|         | s |                  | but we want to    | Section of the    |
|         | c |                  | see more data to  | NWQL on March 11, |
|         | o |                  | be sure.          | 2008.             |
|         | n |                  |                   |                   |
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|         | n |                  |                   |                   |
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|         | b |                  |                   |                   |
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+---------+---+------------------+-------------------+-------------------+
| From    | T |                  | On-line QC charts | The NWQL will     |
|         | h |                  | indicate the bias | continue to       |
| QADATA  | e |                  | does not appear   | monitor the       |
| Summary | p |                  | to be related to  | instrument for    |
| D       | o |                  | standards. The    | bias.             |
| ecember | s |                  | bias also does    |                   |
| 2007    | i |                  | not seem to be    |                   |
|         | t |                  | related to        |                   |
|         | i |                  | carry-over or     |                   |
|         | v |                  | contamination.    |                   |
|         | e |                  | The analyst is    |                   |
|         | b |                  | investigating the |                   |
|         | i |                  | possibility of    |                   |
|         | a |                  | interference,     |                   |
|         | s |                  | however, the      |                   |
|         | d |                  | instrument is     |                   |
|         | i |                  | currently         |                   |
|         | s |                  | undergoing        |                   |
|         | p |                  | repair. More      |                   |
|         | l |                  | research needs to |                   |
|         | a |                  | be conducted as   |                   |
|         | y |                  | soon as the       |                   |
|         | e |                  | instrument is     |                   |
|         | d |                  | operational       |                   |
|         | s |                  | again.            |                   |
|         | i |                  |                   |                   |
|         | n |                  |                   |                   |
|         | c |                  |                   |                   |
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|         | c |                  |                   |                   |
|         | I |                  |                   |                   |
|         | C |                  |                   |                   |
|         | P |                  |                   |                   |
|         | - |                  |                   |                   |
|         | M |                  |                   |                   |
|         | S |                  |                   |                   |
|         | a |                  |                   |                   |
|         | r |                  |                   |                   |
|         | e |                  |                   |                   |
|         | n |                  |                   |                   |
|         | o |                  |                   |                   |
|         | t |                  |                   |                   |
|         | e |                  |                   |                   |
|         | x |                  |                   |                   |
|         | h |                  |                   |                   |
|         | i |                  |                   |                   |
|         | b |                  |                   |                   |
|         | i |                  |                   |                   |
|         | t |                  |                   |                   |
|         | i |                  |                   |                   |
|         | n |                  |                   |                   |
|         | g |                  |                   |                   |
|         | t |                  |                   |                   |
|         | h |                  |                   |                   |
|         | i |                  |                   |                   |
|         | s |                  |                   |                   |
|         | p |                  |                   |                   |
|         | r |                  |                   |                   |
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|         | m |                  |                   |                   |
|         | . |                  |                   |                   |
+---------+---+------------------+-------------------+-------------------+
| From    | T |                  | On-line QC was    | The NWQL will     |
|         | h |                  | showing no bias   | make new          |
| >       | i |                  | so the analyst    | calibration and   |
|  QADATA | s |                  | purchased another | check standards   |
| >       | a |                  | standard from a   | from new stock    |
| Summary | n |                  | different source. | solutions.        |
| >       | a |                  | Initial analyses  |                   |
| October | l |                  | show a bias       |                   |
| > 2007  | y |                  | similar to the    |                   |
|         | t |                  | one on the BQS    |                   |
|         | i |                  | charts.           |                   |
|         | c |                  |                   |                   |
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|         | l |                  |                   |                   |
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+---------+---+------------------+-------------------+-------------------+
| From    | A |                  | On-line QC charts | We will monitor   |
|         | l |                  | indicate an equal | the line to see   |
| >       | t |                  | number of points  | if new results    |
|  QADATA | h |                  | above and below   | continue to       |
| >       | o |                  | the MPV at 10 and | improve the       |
| Summary | u |                  | 100 ug/L. At 10   | charts.           |
| >       | g |                  | ug/L there is a   |                   |
|  August | h |                  | difference        |                   |
| > 2007  | t |                  | between the 2     |                   |
|         | h |                  | instruments with  |                   |
|         | e |                  | one trending high |                   |
|         | r |                  | and one trending  |                   |
|         | e |                  | low.              |                   |
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+---------+---+------------------+-------------------+-------------------+
| From    | T |                  |                   | We are making new |
|         | h |                  |                   | standards and we  |
| >       | e |                  |                   | will continue to  |
|  QADATA | p |                  |                   | closely monitor   |
| >       | o |                  |                   | the analysis for  |
| Summary | s |                  |                   | bias.             |
| > June  | i |                  |                   |                   |
| > 2007  | t |                  |                   |                   |
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|         | d |                  |                   |                   |
|         | s |                  |                   |                   |
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|         | . |                  |                   |                   |
+---------+---+------------------+-------------------+-------------------+
| From    | T |                  | NWQL QC charts    | We will continue  |
|         | h |                  | indicated a       | to closely        |
| >       | e |                  | similar bias and  | monitor the       |
|  QADATA | d |                  | new calibration   | analysis for      |
| >       | a |                  | standards were    | bias.             |
| Summary | t |                  | prepared in the   |                   |
| > April | a |                  | end of March      |                   |
| > 2007  | d |                  | 2007. We are      |                   |
|         | e |                  | still gathering   |                   |
|         | m |                  | data to see if    |                   |
|         | o |                  | the bias has      |                   |
|         | n |                  | improved.         |                   |
|         | s |                  |                   |                   |
|         | t |                  |                   |                   |
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|         | a |                  |                   |                   |
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+---------+---+------------------+-------------------+-------------------+
|         |   |                  |                   |                   |
+---------+---+------------------+-------------------+-------------------+

######  

+---------+---+------------------+-------------------+-------------------+
| **P     | * |                  | **NWQL Comment**  | **Corrective      |
| hysical | * |                  |                   | Action**          |
| Prope   | P |                  |                   |                   |
| rties** | r |                  |                   |                   |
|         | o |                  |                   |                   |
|         | b |                  |                   |                   |
|         | l |                  |                   |                   |
|         | e |                  |                   |                   |
|         | m |                  |                   |                   |
|         | * |                  |                   |                   |
|         | * |                  |                   |                   |
+=========+===+==================+===================+===================+
| [[]{#n  | * |                  |                   |                   |
| wql0114 | * |                  |                   |                   |
| .an     | A |                  |                   |                   |
| chor}** | l |                  |                   |                   |
| Carbon, | l |                  |                   |                   |
| Total   | r |                  |                   |                   |
| Or      | e |                  |                   |                   |
| ganic** | s |                  |                   |                   |
| ](http: | u |                  |                   |                   |
| //bqs.u | l |                  |                   |                   |
| sgs.gov | t |                  |                   |                   |
| /bsp/QA | s |                  |                   |                   |
| DATA_al | r |                  |                   |                   |
| l/08Jun | e |                  |                   |                   |
| /Jun08B | c |                  |                   |                   |
| BP_CU_0 | e |                  |                   |                   |
| 0680OX0 | i |                  |                   |                   |
| 09.xls) | v |                  |                   |                   |
| **UV    | e |                  |                   |                   |
| labcode | d |                  |                   |                   |
| 0114    | s |                  |                   |                   |
| p       | i |                  |                   |                   |
| armcode | n |                  |                   |                   |
| 0680    | c |                  |                   |                   |
| OX009** | e |                  |                   |                   |
|         | t |                  |                   |                   |
|         | h |                  |                   |                   |
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|         | M |                  |                   |                   |
|         | D |                  |                   |                   |
|         | L |                  |                   |                   |
|         | . |                  |                   |                   |
|         | * |                  |                   |                   |
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|         |   |                  |                   |                   |
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|         | * |                  |                   |                   |
|         | N |                  |                   |                   |
|         | o |                  |                   |                   |
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|         | v |                  |                   |                   |
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|         | a |                  |                   |                   |
|         | c |                  |                   |                   |
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|         | c |                  |                   |                   |
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|         | * |                  |                   |                   |
|         | * |                  |                   |                   |
+---------+---+------------------+-------------------+-------------------+
| *P      |   |                  |                   |                   |
| revious |   |                  |                   |                   |
| c       |   |                  |                   |                   |
| omments |   |                  |                   |                   |
| for     |   |                  |                   |                   |
| carbon, |   |                  |                   |                   |
| total   |   |                  |                   |                   |
| o       |   |                  |                   |                   |
| rganic, |   |                  |                   |                   |
| labcode |   |                  |                   |                   |
| 0114,   |   |                  |                   |                   |
| p       |   |                  |                   |                   |
| armcode |   |                  |                   |                   |
| 068     |   |                  |                   |                   |
| 0OX009* |   |                  |                   |                   |
+---------+---+------------------+-------------------+-------------------+
| From    | A |                  | Due to NELAC      | We will review    |
|         | f |                  | audit findings    | and discuss       |
| QADATA  | a |                  | the calibration   | calibration curve |
| Summary | l |                  | curves are        | differences with  |
| October | s |                  | calculated        | the NWQL's        |
| 2007    | e |                  | differently as of | Methods Research  |
|         | p |                  | October 2007.     | and Development   |
|         | o |                  | Previously the    | Program. A 0.4    |
|         | s |                  | curve was created | mg/L standard     |
|         | i |                  | from a            | that was deleted  |
|         | t |                  | point-to-point    | from the          |
|         | i |                  | calculation and   | calibration in    |
|         | v |                  | as of 10/2007 two | October will be   |
|         | e |                  | quadratic         | reinserted in the |
|         | r |                  | equations are     | curve within two  |
|         | a |                  | being used, one   | months.           |
|         | t |                  | for the low end   |                   |
|         | e |                  | and one for the   |                   |
|         | o |                  | high. No prep     |                   |
|         | f |                  | blanks or         |                   |
|         | a |                  | instrument blanks |                   |
|         | b |                  | were above the    |                   |
|         | o |                  | 0.4 mg/L report   |                   |
|         | u |                  | level during this |                   |
|         | t |                  | time period.      |                   |
|         | 5 |                  |                   |                   |
|         | 4 |                  |                   |                   |
|         | % |                  |                   |                   |
|         | i |                  |                   |                   |
|         | s |                  |                   |                   |
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|         | n |                  |                   |                   |
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|         | i |                  |                   |                   |
|         | t |                  |                   |                   |
|         | i |                  |                   |                   |
|         | v |                  |                   |                   |
|         | e |                  |                   |                   |
|         | . |                  |                   |                   |
+---------+---+------------------+-------------------+-------------------+
|         |   |                  |                   |                   |
+---------+---+------------------+-------------------+-------------------+

######