draft amendments to NMP Lab Report 

Terri Zick to: Christopher Lambesis 07/14/2010 09:53 AM 

Cc: Kathy Wilson, "woodgl@trimatrixlabs.com" , Todd Ramaly 

From: Terri Zick <tzick@cticompanies.com> 

To: Christopher Lambesis/R5/USEPAMS@EPA 

Cc: Kathy Wilson <kathywilson@owossographic.com>, "woodgl@trimatrixlabs.com" 

<woodgl@trimatrixlabs.com >, Todd Ramaly/R5/USEPA/US@EPA 

ChrisAttached is a draft of the revised qualifications statement proposed by Trimatrix along with draft 

language (below) intended to be placed in the lab report to further discuss the recoveries observed in 

the QA/QC process. Please take a look and comment as necessary. Trimatrix is targeting this afternoon 

to finalize the text provided you are in agreement with the content . 

Thank you 

Terri Zick 

313-300-7401 cell 

tzick@cticompanies.com 

CTI and Associates, Inc. 

51331 W. Pontiac Trail, Wixom, Ml 48393 

248.486.5100 Phone / 248.486.5050 Fax 

From: Gary Wood [mailto:woodgl@trimatrixlabs.com] 

Sent: Wednesday, July 14, 2010 10:45 AM 

To: Terri Zick 

Cc: 'Kathy Wilson' 

Subject: RE: Summary of 07-08-10 Conference Call 

Good Morning Terri, 

I expect that we will be able to issue all revisions today. Regarding the qualifiers and explanations, due to 

reporting space, we are handling in 2 ways. We've updated our Statement of Data Qualifications page 

(see attached). I will also be inserting a narrative into the text of the SDG narrative pages. That text is as 

listed below. Please review with Chris first and let me know if this meets with his approval before we 

make the final modifications this afternoon. 

During the analysis of the samples for the tentative identification of 

n-methylpyrrolidone, the samples had very low to no recovery for the acid 

surrogate compounds that were spiked into them. In addition, all of the 

samples had failing internal standard recoveries for perylene-d12, and sample 

1003151-04 and 1003151-06 had failing internal standard recoveries for 
chrysene-d12. The poor surrogate recoveries were the direct result of the 

sample matrix, which caused degradation of the injection port and the 

analytical column. Further, the non-target analytes in the sample matrix had 

concentrations such that the response of the internal standards mentioned 

above were suppressed below their acceptance limits. 

These surrogates and internal standards, however, were not associated with 

n-methylpyrrolidone, and as such do not have an impact on the data quality of 

the results. N-methylpyrrolidone is considered a basic analyte, so the low 

acid recoveries are not applicable. All of the base/neutral surrogate 

compounds had acceptable recoveries with one exception - sample 1003151-05 -

which also had a low recovery for the base/neutral surrogate ortho-terphenyl. 

This sample has been qualified as estimated based on the low recovery. The 

internal standard associated with n-methylpyrrolidone is 

1,4-dichlorobenzene-d4, which had acceptable recovery in all of the samples. 

Due to this, no additional qualification is necessary. However, the data user 

must be reminded that all of the sample results are to be considered as 

estimated due to the inexact nature of the TIC calculation, which assumes a 

1:1 response of the analyte and its associated internal standard. 

Gary Wood 

Senior Project Chemist 

Corporate / Laboratory 

5560 Corporate Exchange Court SE 

Grand Rapids, Michigan 49512 

woodgl@trimatrixlabs.com 

Main: 616.975.4500 

Direct: 616.940.4206 

Fax: 616.942.7463 

www.trimatrixlabs.com 

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