# 

GLP10

- 01

- 01

, Interim Report 30 : Analysis of PFOA in Ground w ater Samples Collected at

Off

- Site Wells in Decatur, AL in March /April 2012

Study Title

Analysis of Perfluorooctanoic Acid (PFOA) in Groundwater, Soil and Sediment for the 3M Decatur Phase 3

Site-R elated Monitoring Program



### Data Requirement

EPA TSCA Good Laboratory Practice Standards 40 CFR Part 792



### Study Director

Jaisimha Kesari P.E., DEE

Weston Solutions, Inc.

1400 Weston Way

West Chester, PA 19380

Phone: 610

- 701

- 3761



### Author

Susan Wolf

3M Environmental Laboratory



### Interim Report Completion Date

Date of signing



### Performing Laboratory

3M Environmental Health and Safety Operations

Environmental Laboratory

3M Center, Bldg 260

- 05 -N- 17

St. Paul , MN 55144



### Project Identification

GLP10

- 01

- 01

- 30



### Total Number of Pages

97



### Testing Cert #2052.01 The testing reported herein meet the requirements of ANSI/ISO/IEC 17025:2005 “General

Requirements for the Competence of Testing and Calibration Laboratories”, in accordance with

the A2LA Testing Certificate # 2052.01. Testing that complies with this International Standard

also meets principles of ISO 9001:2000.

### This page has been reserved for specific country requirements.GLP10-01-01 ; Interi m Repor t 3 0

Analysi s o f PFO A i n Groundwate r

Off-Sit e Well s I n Decatur

, A L

- March/Apri l 201 2



### GL P COMPLIANC E STATEMEN T

Repor t Title : GLP10-01-01

, Interi m Repor t 30

. Analysi s o

f PFO A i n Groundwate r Sample s Collecte d

a t Off-Sit e Well s i n Decatur

, A L i n March/Apri l 2012

.

Study : Analysi s o f Perfluorooctanoi c Aci d (PFOA ) i n Groundwater

, Soi l an d Sedimen t fo r th e 3 M

Decatu r Phas e 3 Site-Relate d Monitorin g Program

.

Thi s analytica l phas e wa s conducte d i n complianc e wit h Toxi c Substance s Contro l Ac t (TSCA ) Goo d

Laborator y Practic e (GLP ) Standards

, 4 0 CF R 792

, wit h th e exception s liste d below :

• Thes e ar e environmenta l sample s wher e ther e i s n o specifi c tes t substance

, n o specifi c tes t

syste m an d n o dosin g o f a tes t system

.

• Th e referenc e substance s hav e no t bee n characterize d unde r th e GLP s an d th e stabilit y unde r

storag e condition s a

t th e tes t sit e hav e no

t bee n determine d unde r GLPs

.

Gar y Honenstein

, Sponso r Representativ e Dat e

Jaisimh a K^ri

, P.E.

, DEE

, Stud y Directo r ' Dat e

Pag e 3 o f 9 7GLP10-01-01 ; Interi m Repor t 3 0

Analysi s o f PFO A i n Groundwate r

Off-Sit e Well s I n Decatur

, A L

- March/Apri l 201 2



## QUALIT Y ASSURANC E STATEMEN T

Repor t Title : GLP10-01-01

, Interi m Repor t 30

. Analysi s o

f PFO A i n Groundwate r Sample s

Collecte d a

t Off-Sit e Well s i n Decatur

, A L i n March/Apri l 2012

.

Study : Analysi s o f Perfluorooctanoi c Aci d (PFOA ) i n Groundwater

, Soi l ah d Sedimen t fo r th e 3 M

Decatu r Phas e 3 Site-Relate d Monitorin g Program

.

Thi s repor

t an d th e accompanyin g dat a wer e audite d b y th e 3 M Environmenta l Laborator y Qualit y

Assuranc e Uni t (QAU)

, a s indicate d below

. Th e finding s wer e reporte d t o th e principa l analytica l

investigato r (P.A.I.)

, laborator y managemen t an d stud y director

.

Inspectio n Date s Phas e Dat e Reporte d t o

Inspectio n Date s Phas e Testin g Facilit y •Managemen t Stud y Directo r

4/25/12-4/26/1 2 Dat a an d Repor

t 5/1/1 2 5/1/1 2



### QA U Representativ e Dat e

Pag e 4 o f 9 7

# T ABLE OF 

# C ONTENTS

GLP Compliance Statement

...................................................................................................................... 3

Quality As surance Statement

.................................................................................................................... 4

Table of Contents

................................................................................................ ....................................... 5

List of Tables

................................................................................................ ............................................... 6

1 Study Information

................................................................................................ ................................ 8

2 Summary

................................................................................................ ............................................. 9

3 Introduction

................................................................................................ ........................................ 10

4 Test & Control Su bstances

............................................................................................................... 11

5 Reference Substances

..................................................................................................................... 11

6 Test System

................................................................................................ ....................................... 12

7 Method Summary

.............................................................................................................................. 12

7.1 Methods

............................................................................................................................. 12

7.2 Sample Collection

............................................................................................................. 12

7.3 Sample Pr eparation

.......................................................................................................... 12

7.4 Analysis

............................................................................................................................. 12

8 Analytical Results

.............................................................................................................................. 14

8.1 Calibration

......................................................................................................................... 14

8.2 System Suitability

.............................................................................................................. 14

8.3 Limit of Quantitation (LOQ)

.............................................................................................. 14

8.4 Continuing Calibration

...................................................................................................... 15

8.5 Blanks

................................................................................................ ................................ 15

8.6 Lab Control Spikes (LCSs)

............................................................................................... 15

8.7 Analytical Method Uncertainty

.......................................................................................... 17

8.8 Field Matrix Spikes (FMS)

................................................................................................ 17

### 9 Data Summary and Discussion

........................................................................................................ 17

10 Conclusion

................................................................................................ ......................................... 26

11 Data/Sample Retention

.................................................................................................................... 26

12 Attachments

................................................................................................ ....................................... 26

13 Signatures

................................................................................................ .......................................... 27



# L IST OF 

# T ABLES

Table 1. Summarized PFOA Results (Off

- Site Wells, March/April 2012)

........................... 10

Table 2. Sample Description Key Code.

............................................................................... 12

Table 3. Instrument Parameters.

.......................................................................................... 13

Table 4. Liquid Chromatography Conditions.

...................................................................... 13

Table 5. Mass Transitions.

.................................................................................................... 13

Table 6. Limit of Quantitation (LOQ).

.................................................................................... 14

Table 7. Laboratory Control Spike Recovery.

...................................................................... 16

Table 8. Analytical Method Uncertainty.

............................................................................... 17

Table 9. Field Matrix Spike Levels.

....................................................................................... 17

Table 10. DAL GW 602S 120330

......................................................................................... 18

Table 11. DAL GW 602L 1 20330

......................................................................................... 18

Table 12. DAL GW 603S 120330

......................................................................................... 18

Table 13. DAL GW 603L 120330

......................................................................................... 19

Table 14. DAL GW 604R 120330

........................................................................................ 19

Table 15. DAL GW 604S 120330

.......................................................................................... 19

Table 16. DAL GW 604L 120403

.......................................................................................... 20

Table 17. DAL GW 605R 120404

......................................................................................... 20

Table 18. DAL GW 605L 120404

.......................................................................................... 20

Table 19. DAL GW 607R 120403

......................................................................................... 21

Table 20. DAL GW 607L 120403

.......................................................................................... 21

### Table 21. DAL GW 609R 120330

......................................................................................... 21

Table 22. DAL GW 609L 120330

.......................................................................................... 22

Table 23. DAL GW 610R 120404

......................................................................................... 22

Table 24. DAL GW 610L 120404

.......................................................................................... 22

Table 25. DAL GW 611R 120404

......................................................................................... 23

Table 26. DAL GW 611L 120404

.......................................................................................... 23

Table 27. DAL GW MW1 21 120405

..................................................................................... 23

Table 28. DAL GW MW47 120405

....................................................................................... 24

Table 29. DAL GW MW13S 120404

..................................................................................... 24

Table 30. DAL GW MW13I 120404

...................................................................................... 24

Table 31. DAL GW MW13B 120404

..................................................................................... 25

Table 32. Equipment Rinseate Blanks

.................................................................................. 25

Table 33. Trip Blanks

............................................................................................................. 25

## 1 **Study Information**

Sponsor

3M Company

Sponsor Representative

Gary Hohenstein

3M EHS Operations

3M Building 224

- 5W

- 03

Saint Paul, MN 55144

- 1000

Phone: (651) 737

- 3570

Study Director

Jaisimha Kesari, P.E., DEE

Weston Solutions, Inc.

West Chester, PA 19380

Phone: (610) 701

- 3761

Fax: (610) 701

- 7401

j.kesari@westonsolutions.com

Study Location

Testing Facility

3M EHS Operations

3M Environmental Labora tory

Building 260

- 5N

- 17

St. Paul , MN 551 44

Study Personnel

William K. Reagen, Ph.D., 3M Laboratory Manager

Cleston Lange

, Ph.D., Principal Analytical Investigator. ( clange@mmm.com ); phone (651)

- 733

- 9860

Susan Wolf

, 3M Analyst

Chelsie Grochow, Analyst

Kevin Eich, Analyst

Kelly Ukes, Analyst

Jonathan Steege, Analyst

Study Dates

Study Initiation: March 8 , 2010

Interim Report 30 Experimental Termination : April 21 , 2012

Interim Report Completion: Date of Interim Report Sign ing

Location of Archives

All original raw data and the analytical report have been archived at the 3M Environmental

Laboratory according to 40 CFR Part 792. The test substance and analytical reference standard

reserve samples are archived at the 3M Environmental Laboratory according to 40 CFR Part 792

## 2 **Summary**

The 3M Environmental Laboratory prepared sample containers for twenty

- four existing off

- site wells in

Decatur, AL. Samples were collected March 30, 2010

– April 5, 2012. Of the seventy

- six sample

co ntainers prepared, seventy groundwater sample bottles were received at the 3M Environmental

Laboratory for perfluorooctanoate ( PFOA ) analysis from Weston personnel on April 9, 2012. Sampling

locations DAL GW 602R and DAL GW 603R were not sampled. All sa mples were logged into the

laboratory information management system (LIMS) under project GLP10

- 01

- 01

- 30

.

For each sampling location, a field sample, field du plicate sample and field matrix spike (FMS) sample

were collected

. The reference standard used to prepare the FMS sample s consisted of both linear

and branched isomers of PFOA

. Samples also included a trip blank containing Milli

- QTM water and an

appropriate trip blank spike . Two equipment rinseate blanks were also collected

. The equipment

rinseate blanks did not have FMS samples prepared for determination of PFOA recovery. All sample

bottles were fortified with internal standard 13 

### C 8 

### - PFOA and surrogate recovery standard 13 

### C 4 

### - PFOA

prior to sample collection

. All of the samples were prepared and analyzed for PFOA and the surrogate

recovery standard 13 

### C 4 

### - PFOA

, following 3 M Environmental Laboratory Method ET S-8- 044. 1. Where

applicable, samples were analyzed against an internal standard calibration curve.

The average measured PFOA concentrations are summarized in Table 1. T he trip blank and

equipment rinseate blanks w ere below the lower limit of quantita tion (LLOQ) of 0.024 0 ng/mL,

indicating adequate control of sample contamination during shipping and sample collection

. The

analytical method uncertainty for samples analyzed by internal calibration was estimated at ± 17%. Due

to a sample container preparation error, the internal standard was inadvertently not added to the field

sample duplicate and FMS sample bottles for location DAL GW 602S. As a result, this sampling

location was analyzed by external calibration with an analytical method uncertainty es timated at ± 27%.

### Table 1 . Summarized PFOA Results ( Off

- Site Wells

, March /April 201 2) (1)



### Sample ID Avg. PFOA

Concentration

(ng/mL ) (1) 

### Relative

Percent

Difference

DAL GW 602S 120330 0.490 (2) 

### 1.8%

DAL GW 602L 120330 1.38 5.8%

DAL GW 603S 120330 0.407 7.9%

DAL GW 603L 120330 0.357 3.4%

DAL GW 604R 120330 1.08 6.5 %

DAL GW 604 S 120330 1.40 1.4%

DAL GW 604L 120403 1.56 1.3%

DAL GW 605R 120404 0.297 5.7%

DAL GW 605L 120404 0.223 14%

DAL GW 607R 120403 0.408 5.6%

DAL GW 607L 120403 0.550 2.7%

DAL GW 609R 120330 0.400 9.0%

DAL GW 609L 120330 0.695 6.8%

DAL GW 610R 120404 1.75 0.57%

DAL GW 610L 120404 2.98 7.7%

DAL GW 611R 120404 0.581 0.52%

DAL GW 611L 120404 0.504 0.99%

DAL GW MW121 120405 0.0566 4.8%

DAL GW MW47 120405 0.242 7.4%

DAL GW MW13S 120404 <0.0240 N/A

DAL GW MW13I 120404 0.0525 7.6%

DAL GW MW13B 120404 0.0850 0.94%

Trip Blank s (Milli

- QTM Water) <0.0240 N/A

GLP10

- 01

- 01

- 30 Equipment rinseate blanks :

DAL GW 604L and DAL GW 607R <0.0240 N/A

N/A: not applicable

L ocations DAL GW 602R and DAL GW 603R were not sampled.

(1) All s amples were analyzed using internal calibration except where noted . The analytical method

uncertainty analyzed by internal calibration for PFOA is + 17%.

(2) S amples for location DAL GW 602S were analyzed using external calibration. The analytical

method uncertainty analyzed by external calibration for PFOA is + 27%.



## 3 **Introduction**

This analytical study was conducted as part of the Phase 3 En vironmental M onitoring and A ssessment

P rogram for the 3M facility located in Decatur, Alabama. The objective of the overall program is to gain

information regarding concentrations of perfluorooctanoate (PFOA) in various environmental media

such as groundwater, soils and sediments that are associated with and near the Decatur facility. This

analytical study was conducted to analyze ground water samples collected from twenty

- two locations

from off

- site w ells in Decatur, AL for PFOA

.

The 3M Environmental Laboratory prepared sample bottles ( 25 0 mL high

- densi ty polyethylene ) which

were shipped to Decatur, AL Weston personnel prior to field sampling. Sample bottle sets for each

sampl ing location included a field sample, field sample duplicate, and one field spike sample . Each

empty container for sampling was marked with a “fill to here” line to produce a final sample volume of

20 0 mL. Containers designated for field matrix samples were fortified with an appropriate ma trix spike

### solution containing PFOA prior to being sent to the field for sample collection. All sample bottles

included the addition of 13 

### C 8 

### - PFOA (internal standard) at a nominal concentration of 1 ng/mL and 13 

### C 4 

### - PFOA ( surrogate recovery standard) at a nominal concentration of 0.1 ng/mL

. See section 8.8 of the

report for field matrix spike levels

.

S ample s were prepared and analyzed according to the procedure defined in 3M E nvironmental

Laboratory method ETS -8- 044. 1 “ Method of Analysis for the Determination of Perf luorinated

Compounds i n Wa ter by LC/MS/MS; Direct Injection Analysis”. The use of an internal standard was

used to aid in the data quality objectives.

Table 1 summarize s the average PFOA concentration for the duplicate ground water samples collected

as well as a single trip blank and two equipment rinseate blank sample s. Table s 10

- 33 summarize the

individual sample results and the associated FMS recoveries

. All results for the quality control samples

prepared and analyzed with the samples are reported and discussed elsewhere in this report.



## 4 **Test & Control**  **Substance s** 

Th ere was not a test substance or control substances in the classic sense of a GLP study. Thi s study

was purely analytical in nature.



## 5 **Reference Substances**

The analytical reference substances used for this study are listed below.

Reference

Substance PFOA

(Linear +

Branched) PFOA

(Linear +

Branched 13 C

4 - PFOA 13 C

8 - PFOA



### Chemical Name Perfluorooctanoate Perfluorooctanoate Perfluorooctanoate Perfluorooctanoate

Chemical Formula C 7 

### F 15 

### COOH 

### C 7 

### F 15 

### COO - 13 

### C 4 

### HF 15 

### O 2 13 

### C 8 

### HF 15 

### O 2



### Identifier CAS # 95328

- 99 -7 CAS # 335

- 67 -1 MPFOA MPFC -C-0 112

Use Target Analyte

Reference

Standard FMS Reference

Standard Surrog ate

Recovery

Standard Internal Standard

Source Wellington Sigma Aldrich Wellington Wellington

Expiration Date 03/17/2014 07/27/2016 12/07/2013 01/24/2015

Storage Conditions Frozen Ambient Frozen Frozen

Chemical Lot

Number TPFOA0311 MKBD4574V MPFOA1210 012312

TCR Number TCR11

- 0009,

TCR11

- 0042 TCR11

- 0029 TCR11

- 0001 TCR12

- 0004

Physical

Description Liquid Powder Liquid Liquid

Purity 98.3% 96.8% >98% NA (1)

(1) Compound is part of a custom mixture of mass

- labeled perfluorinated compounds at a concentration of 5.0 μ g/mL.

## 6 **Test System**

There was not a test system for this study in the classic sense of a GLP study. This study was

conducted for analysis of ground water samples collected from the Off

- Site Wells located near Decatur,

AL by Weston Solutions, Inc. p ersonnel. Samples for this study are “real world” environmental

samples.

Table 2

. Sample Description Key Code.

String Number String Descriptor Example

**Example DAL** 

**- GW** 

**- 602S** 

**- 0** 

**- 120330** 

**1 Sample**  **Location DAL**  **= Decatur, Alabama** 

**2 Sampl**  **e Type GW= Ground Water** 

**3 Well Identifier**  **Example: 602S** 

**4 Well Level**  **R = Residu u**  **m shallow water**

**- bearing zone** 

**L = Bedrock water**

**- bearing zo**  **ne**

**S = Epikarst middle water**

**- bearing zone** 

**5 Sample Type**  **1 20330** 

**– March 30, 2012** 

**6 Sampling Date**  **0=primary sample**

**DB =duplicate sample** 

**FM S =**  **Field Matrix Spike**



## 7 **Method Summary**

7.1 Method

Analysis for all analytes was completed following 3M Environmental Laboratory method ETS -8- 044. 1

“ Method of Analysis for the Determination of Perfluorinated Compounds In Water by High Perf ormance

Liquid Chromatography/Mass Spectrometry Direct Injection Analysis”.



## 7.2 Sample Collection

Samples were collected in 25 0 mL Nalgene TM 

### ( high

- density polyethylene) bottles prepared at the 3M

Environmental Laboratory. Sample bottles associated with GL P10

- 01

- 01

- 30 were returned to the

laboratory at ambient conditions on April 9 , 2012

. Samples were stored refrigerated at the laboratory

after receipt. A set of laboratory prepared Trip Blank and Trip Blank field matrix spike samples were

sent with the set of sample collection bottles.



## 7.3 Sample Preparation

Samples were prepared by removing an aliquot of the well mixed sample and placing it in an autovial for

analysis.

During the preparation of the laboratory control samples, an aliquot of a separate internal standard

spiking solution was added to the laboratory control samples (nominal concentration of 1 ng/mL). The

samples bottles were spiked with an internal standard mix at a nominal concentration of 1 ng/mL prior to

being sent to the field for sample collection.



## 7.4 Analysis

All study samples and quality control samples were analyzed for PFOA using high performance liquid

chromatography/ tandem mass spectrometry (HPLC/MS/MS). Detailed instrument parameters, the

liquid chromatography gradient program, and the specific mass transitions analyzed are described in the

### raw data hard copies placed in the final data packet, and are briefly described below in Table 3

, Table 4

and Table 5

.

Table 3 . Instrument Parameters

.

Instrument Name E TS Buster

Analytical Method Followed ETS

- 8

- 044.1

Analysis Date 4/18 /12

Liquid Chromatograph Agilent 1 1 00

Guard column Betasil C18 (4.6 mm X 100 mm), 5 μ

Analytical column Betasil C18 (4.6 mm X 100 mm), 5 μ

Injection Volume 50 μ L

Mass Spectrometer Appl ied Biosystems API 4000

Ion Source Turbo Spray

Electrode Turbo ion electrode

Polarity Negative

Software Analyst 1. 4 .2



### Table 4 . Liquid Chromatography Conditions

.

**Step**

**Number Total Time** 

**(min) Flow Rate** 

**(** μ

**L/min) Percent A** 

**(2 mM ammonium acetate)**  **Percent B**

**(Methanol)**

ETS

- 8

- 044.1 Analysis

0 0 .0 750 97 .0 3 .0

1 2.0 750 97 .0 3 .0

2 14.5 750 5. 0 9 5 .0

3 15.5 750 5. 0 95 .0

4 1 6.5 750 97 .0 3 .0

5 20.0 750 97 .0 3 .0



### Table 5. Mass Transitions.

**Analyte Mass Tra**  **nsition**

**Q1/Q3 Internal Standard**  **Mass Transition**

**Q1/Q3**

**PFOA 413/369** 

**[ 13**  **C 8**  **]-**

**PFOA 421/376**  **413/219**

**413/169**

**[ 13**  **C**

**4 ]** 

**- PFOA**  **417/ 372**  **[ 13**  **C 8**  **]**

**- PFOA**  **421/376**

Dwell time was 5 0 msec for each transition. The individual transitions were summed to produce a

“tot al ion chromatogram” (TIC), which was used for quantitation.

## 8 **Analytical Results** 

8.1 Calibration

8.1.1 Internal standard calibration:

Samples were analyzed using a stable isotope internal standard calibration curve. Calibration standards

were prepared by spiking known amounts of the stock solution containing PFOA (reference standard

cont a ining both linear and branched isomers) into a laboratory

- prepared synthetic groundwater

containing calcium and magnesium. A separate internal standard spiking solution was prepared and an

aliquot was added at the same level to all calibration standards and laboratory control samples at a

nominal concentration of 1 ng/mL. A calibration curve ranging from approximately 0.025 ng/mL to 25

ng/mL (0.025 ng/mL to 10 ng/mL for 13 

### C 4 

### - PFOA surrogate) was prepared. A quadratic, 1/x weighted,

calibration curve of the standard peak area/peak area ratios was used to fit the data for each analyte.

The data were not forced through zero during the fitting process. Calculating the standa rd

concentrations using the peak area ratios and the resultant calibration curve confirmed accuracy of each

curve point.

8.1.2 External standard calibration for sampling location DAL GW 602S:

See 8.1.1 for the preparation of the calibration curve. For external standard calibration, a quadratic, 1/x

weighted, calibration curve was used to fit the data for each analyte. The data w ere not forced through

zer o during the fitting process. Calculating the standard concentration using the peak area counts and

the resultant calibration curve confirmed accuracy of each curve point. The PFOA reference standard

used to prepare the calibration standards consisted of both linear and branched isomers.

Each curve point was quantitated using the overall calibration curve and reviewed for accuracy. Method

calibration accuracy requirements of 100 ± 25% (100 ± 30% for the lowest curve point) were met for

PFOA and 13 

### C 4 

### - PFOA surrogate. The correlation coefficient (r) was greater than 0.995 for both

analytes

.



## 8.2 Sy stem Suitability

A calibration standard was analyzed four times at the beginning of the analytical sequence to

demonstrate overall system suitability. T he acceptance criteria of less than or equal to 5% relative

standard deviation (RSD) for peak area rat ios (internal standard calibration) or peak area counts

(external standard calibration) and retention time criteria of less than or equal to 2% RSD were met for

PFOA and 13 

### C 4 

### - PFOA surrogate

.



## 8.3 Limit of Quantitation (LOQ)

The LOQ for this analysis is the lowest non

- zero calibration standard in the curve that meets linearity

and accuracy requirements and for which the area counts are at least twice those of the appropriate

blanks. The nominal LOQ for PFOA can be found in Table 6

.

Table 6 . Limit of Quantitation (LOQ)

.

**Analysis Date PFOA**  **(1)**



### ng/mL

4/16/12 0.0240

(1) Internal and externa l calibration analysis.

## 8.4 Continuing Calibration

During the course of each analytical sequence, continuing calibration verification samples (CCVs) were

a nalyzed to confirm that the instrument response and the initial calibration curve were still in control. All

CCVs met method criteria of 100% ± 25 % for PFOA and 13 

### C 4 

### - PFOA surrogate

.



## 8.5 Blanks

Three types of blanks were prepared and analyzed with the samples: procedural blanks, trip blanks, and

equipment rinseate blanks. Procedural blank results were reviewed and used to evaluate method

performance and to determine the LOQ for PFOA. Trip blanks reflect the shipping and sample collection

conditons the sample bottles and samples experience. Equipment rinseate blanks are aqueous

samples that reflect the efficiency of equipment cleaning in the field between different sample collections

to ensure no cross contamination of samples from the equipment.



## 8.6 Lab Contro l Spikes (LCSs)

Low, mid, and high lab control spikes were prepared for the target analytes and analyzed in triplicate,

while only low and high lab control spikes were prepared for the 13 

### C 4 

### - PFOA surrogate. LCSs were

prepared by spiking known amounts of the analyte into 1 0 mL of synthetic groundwater to produce the

desired concentration. The spiked water samples were then analyzed in the same manner as the

samples

. The method acceptance criteria, average of LCS at each level should be within 100% ± 20%

w ith an RSD ≤20 %, were met for both PFOA and 13 

### C 4 

### - PFOA surrogate

.

The following calculations were used to generate data in Table 7 for laboratory control spikes :

100% *

ion Concentrat Spike ion Concentrat Calculated Recovery Percent LCS

=

100% *

recovery LCS average replicates LCS deviation standard RSD LCS%

=

### Table 7. Laboratory Control Spike Recovery

.

ETS -8- 044.1

Analyzed 4/16/12

Internal standard

calibration 

### PFOA (Linear + Branched) **13** 

### C **4** 

### - **PFOA surrogate**

**Lab ID Spiked** 

**Concentration**

**(ng/mL) Calculated** 

**Concentration**

**(ng/mL) %Recovery**  **Spiked**

**Concentration**

**(ng/ mL)**  **Calculated**

**Concentration**

**(ng/mL) %Recovery** 

LCS

- 120416

- 1 0.190 0.186 97.7 0.198 0.207 104

LCS

- 120416

- 2 0.190 0.195 103 0.198 0.212 107

LCS

- 120416

- 3 0.190 0.197 104 0.198 0.216 109

Average ± %RSD 102 % ± 3 .3% 107 % ± 2.4 %

LCS

- 120416

- 4 1.90 1.94 102 1.98 2.06 104

LCS

- 120416

- 5 1.90 1.97 104 1.98 2.10 106

LCS

- 120416

- 6 1.90 2.00 105 1.98 2.12 107

Average ± %RSD 104 % ± 1.5 % 10 6% ± 1.4 %

LCS

- 120416

- 7 9.52 8.85 93.0 NA NA NA

LCS

- 120416

- 8 9.52 8. 62 90.5 NA NA NA

LCS

- 120416

- 9 9.52 8.80 92.4 NA NA NA

Average ± %RSD 92.0 % ± 1.4 % NA

ETS -8- 044.1

Analyzed 4/16/12

External standard

calibration 

### PFOA (Linear + Branched) **13** 

### C **4** 

### - **PFOA surrogate**

**Lab ID Spiked** 

**Concentration**

**(ng/mL) Calculated** 

**Concentrat ion** 

**(ng/mL) %Recovery**  **Spiked**

**Concentration**

**(ng/mL) Calculated** 

**Concentration**

**(ng/mL) %Recovery** 

LCS

- 120416

- 1 0.190 0.202 106 0.198 0.206 104

LCS

- 120416

- 2 0.190 0.215 113 0.198 0.214 108

LCS

- 120416

- 3 0.190 0.213 112 0.198 0.213 108

Average ± %RSD 110 % ± 3.4 % 107 % ± 2.2 %

LCS

- 120416

- 4 1.90 2.15 113 1.98 2.07 104

LCS

- 120416

- 5 1.90 2.10 110 1.98 2.03 103

LCS

- 120416

- 6 1.90 2.15 113 1.98 2.07 105

Average ± %RSD 112 % ± 1.5 % 104 % ± 0.96 %

LCS

- 120416

- 7 9.52 9.47 99.5 NA NA NA

LCS

- 120416

- 8 9.52 8.99 94.4 N A NA NA

LCS

- 120416

- 9 9.52 9.13 95.9 NA NA NA

Average ± %RSD 96 .6% ± 2.7 % NA

NA = Not applicable

## 8.7 Analytical Method Uncertainty

Analytical uncertainty is based on historical QC data that is control charted and used to evaluate

method accuracy and pre cision. The method uncertainty is calculated following ETS

- 12

- 012.2. The

standard deviation is calculated for the set of accuracy results (in %) obtained for the QC samples. The

expanded uncertainty is calculated by multiplying the standard deviation by a factor of 2, which

corresponds to a confidence level of 95%.

Table 8 . Analytical Method Uncertainty.

Analyte Method Standard Deviation Method

Uncertainty

PFOA (1) 

### ETS

- 8

- 044.1 8.47 ± 17%

PFOA (2) 

### ETS

- 8

- 044.1 13.4 ± 27%

(1) Anal yzed by internal standard calibration.

(2) Analyzed by external standard calibration.



## 8.8 Field Matrix Spikes (FMS)

Low and high field matrix spikes were collected at each sampling point to verify that the analytical

method is applicable to the collected matrix. Field matrix spikes were generated by adding a measured

volume of field sample to a container spiked by the laboratory with PFOA ( reference standard containing

both linear and branched isomers ) prior to shipping sample containers for sample collection. F ield

matrix spike recoveries within method acceptance criteria of 100±30% confirm that “unknown”

components in the sample matrix do not significantly interfere with the extraction and analysis of the

analytes of interest. Field matrix spike concentrations must be 50% of the sample concentration to be

considered an appropriate field spike. Field matrix spikes are presented in section 9 of this report.

Table 9 . Field Matrix Spike Levels.

Sampling Location PFOA, ng/mL

602S, 603S, 603L, 604R, 604S, 604L, 605R, 605L, 607R, 607L,

609R, 610R, 611R, 611L, MW121, MW47, MW13S, MW13I, and

MW13B, Trip Blank 0.974

602L, 609L, and 610L 1.95

100% *

on Concentrat Spike Dup.) Sample Field & Sample Field: ion Concentrat Average FMS of ion Concentrat ( Sample Recovery FMS −

=



## 9 **Data Summary and Discussion**

The tables below summarize the sample results and field matrix spike recoveries for the sampling

loca tions as well as the equipment rinseate and trip b lank s

. Results and average values are rounded

to three significant figures according to EPA rounding rules. Because of rounding, values may vary

sligh tly from those listed in the raw data. Field matrix spike recoveries meeting the method acceptance

criteria of ± 30%, demonstrate that the method was appropriate for the given matrix and their respective

quantitative ranges

.

### Table 10

. DAL GW 602S 120330

**PFOA 13**  

### C **4** 

### - **PFOA**

**3M LIMS ID Description**  **Concentration**

**(ng/mL) %Recovery**  **%Recovery**

GLP10

- 01

- 01

- 30

- 004 DAL

- GW

- 602S

- 0

- 120330 0.494 NA 99.3

GLP10

- 01

- 01

- 30

- 005 DAL

- GW

- 602S

- DB

- 120330 0.485 NA 79.7

GLP10

- 01

- 01

- 30

- 006 D AL

- GW

- 602S

- FMS

- 120330 1.60 114 82.7

**Average Concentration (ng/mL) ±**  **%RPD /RSD**  **0.490 ng/mL**  **± 1.8 %**  **87.2 %**  **± 12**  %

NA = Not Applicable

All samples were quantitated by external standard calibration.



### Table 11

. DAL GW 602L 120330

**PFO A**  **13** 

### C **4** 

### - **PFOA**

**3M LIMS ID Description**  **Concentration**

**(ng/mL) %Recovery**  **%Recovery**

GLP10

- 01

- 01

- 30

- 007 DAL

- GW

- 602L

- 0

- 120330 1.42 NA 96.9

GLP10

- 01

- 01

- 30

- 008 DAL

- GW

- 602L

- DB

- 120330 1.34 NA 95.9

GLP10

- 01

- 01

- 30

- 009 DAL

- GW

- 602L

- FMS

- 120330 3.31 99.1 99.7

**Average C oncentration (ng/mL)**  **± %RPD**  **/RSD 1.38**  **ng/mL ±**  **5.8 % 97.5**  **% ±**  **2.0** %

NA = Not Applicable

All samples were quantitated by internal standard calibration.



### Table 12

. DAL GW 603S 120330

**PFOA 13**  

### C **4** 

### - **PFOA**

**3M LIMS ID Description**  **Concentrati on** 

**(ng/mL) %Recovery**  **%Recovery**

GLP10

- 01

- 01

- 30

- 013 DAL

- GW

- 603S

- 0

- 120330 0.423 NA 108

GLP10

- 01

- 01

- 30

- 014 DAL

- GW

- 603S

- DB

- 120330 0.391 NA 110

GLP10

- 01

- 01

- 30

- 015 DAL

- GW

- 603S

- FMS

- 120330 1.64 127 112

**Average Concentration (ng/mL) ±**  **%RPD /RSD**  **0.407 ng/mL**  **± 7.9**  **% 110**  **% ±**  **1.8 %** 

NA = Not Applicable

All samples were quantitated by internal standard calibration.

### Table 13

. DAL GW 603L 120330

**PFOA 13**  

### C **4** 

### - **PFOA**

**3M LIMS ID Description**  **Concentration**

**(ng/mL) %Recovery**  **%Recovery**

GLP10

- 01

- 01

- 30

- 016 DAL

- GW

- 603L

- 0

- 120330 0.363 NA 95.5

GLP10

- 01

- 01

- 30

- 017 DAL

- GW

- 603L

- DB

- 120330 0.351 NA 98.4

GLP10

- 01

- 01

- 30

- 018 DAL

- GW

- 603L

- FMS

- 120330 1.22 88.6 84.1

**Average Concentration (ng/mL) ±**  **%RPD /RSD**  **0.357 ng/mL**  **± 3.4**  **% 92.7**  **% ±**  **8.2 %** 

NA = Not Applicable

All samples were quantitated by internal standard calibration.



### Table 14

. DAL GW 604R 120330

**PFOA 13**  

### C **4** 

### - **PFOA**

**3M LIMS ID Description**  **Concentration**

**(ng/mL) %Recovery**  **%Recovery**

GLP10

- 01

- 01

- 30

- 019 DAL

- GW

- 604R

- 0

- 120330 1.11 NA 107

GLP10

- 01

- 01

- 30

- 020 DAL

- GW

- 604R

- DB

- 120330 1.04 NA 111

GLP10

- 01

- 01

- 30

- 021 DAL

- GW

- 604R

- FMS

- 120330 2.10 105 102

**Average Concentration (ng/mL) ±**  **%RPD /RSD**  **1.08 ng/mL**  **± 6.5**  **% 107**  **% ±**  **4.2 %** 

NA = Not Applicable

All samples were quantitated by internal standard cal ibration.



### Table 15. DAL GW 604S 120330

**PFOA 13**  

### C **4** 

### - **PFOA**

**3M LIMS ID Description**  **Concentration**

**(ng/mL) %Recovery**  **%Recovery**

GLP10

- 01

- 01

- 30

- 022 DAL

- GW

- 604S

- 0

- 120330 1.39 NA 99.1

GLP10

- 01

- 01

- 30

- 023 DAL

- GW

- 604S

- DB

- 120330 1.41 NA 111

GLP10

- 01

- 01

- 30

- 024 DAL

- GW

- 604S

- FMS

- 120330 2.45 108 107

**Average Concentration (ng/mL) ±**  **%RPD /RSD**  **1.40 ng/mL**  **± 1.4**  **% 106**  **% ±**  **5.8 %** 

NA = Not Applicable

All samples were quantitated by internal standard calibration.

### Table 16. DAL GW 604L 120403

**PFOA 13**  

### C **4** 

### - **PFOA**

**3M LIMS ID Desc**  **ription Concentration** 

**(ng/mL) %Recovery**  **%Recovery**

GLP10

- 01

- 01

- 30

- 025 DAL

- GW

- 604L

- 0

- 120403 1.55 NA 98.5

GLP10

- 01

- 01

- 30

- 026 DAL

- GW

- 604L

- DB

- 120403 1.57 NA 109

GLP10

- 01

- 01

- 30

- 027 DAL

- GW

- 604L

- FMS

- 120403 2.51 97.5 99.9

**Average Concentration (ng/mL) ±**  **%RPD /R** 

**SD 1.56**  **ng/mL ±**  **1.3 %**  **103 %**  **± 5.7**  **%**

NA = Not Applicable

All samples were quantitated by internal standard calibration.



### Table 17. DAL GW 605R 120404

**PFOA 13**  

### C **4** 

### - **PFOA**

**3M LIMS ID Description**  **Concentration**

**(ng/mL) %Recovery**  **%Recovery**

GLP10

- 01

- 01

- 30

- 028 DAL

- GW

- 605R

- 0

- 120404 0.305 NA 99.1

GLP10

- 01

- 01

- 30

- 029 DAL

- GW

- 605R

- DB

- 120404 0.288 NA 102

GLP10

- 01

- 01

- 30

- 030 DAL

- GW

- 605R

- FMS

- 120404 1.16 88.7 85.7

**Average Concentration (ng/mL) ±**  **%RPD /RSD**  **0.297 ng/mL**  **± 5.7**  **% 95.7**  **% ±**  **9.2 %** 

NA = Not Applicable

All samples wer e quantitated by internal standard calibration.



### Table 18. DAL GW 605L 120404

**PFOA 13**  

### C **4** 

### - **PFOA**

**3M LIMS ID Description**  **Concentration**

**(ng/mL) %Recovery**  **%Recovery**

GLP10

- 01

- 01

- 30

- 031 DAL

- GW

- 605L

- 0

- 120404 0.239 NA 110

GLP10

- 01

- 01

- 30

- 032 DAL

- GW

- 605L

- DB

- 12040 4 0.207 NA 91.0

GLP10

- 01

- 01

- 30

- 033 DAL

- GW

- 605L

- FMS

- 120404 1.21 101 97.5

**Average Concentration (ng/mL) ±**  **%RPD /RSD**  **0.223 ng/mL**  **± 14**  **% 99.6**  **% ±**  **9.8 %** 

NA = Not Applicable

All samples were quantitated by internal standard calibration.

### Table 19. DAL GW 607R 120403

**PFOA 13**  

### C **4** 

### - **PFOA**

**3M LIMS ID Description**  **Concentration**

**(ng/mL) %Recovery**  **%Recovery**

GLP10

- 01

- 01

- 30

- 034 DAL

- GW

- 607R

- 0

- 120403 0.396 NA 97.7

GLP10

- 01

- 01

- 30

- 035 DAL

- GW

- 607R

- DB

- 120403 0.419 NA 110

GLP10

- 01

- 01

- 30

- 036 DAL

- GW

- 607R

- FMS

- 120403 1.44 10 6 99.2

**Average Concentration (ng/mL) ±**  **%RPD /RSD**  **0.408 ng/mL**  **± 5.6**  **% 102**  **% ±**  **6.7 %** 

NA = Not Applicable

All samples were quantitated by internal standard calibration.



### Table 20. DAL GW 607L 120403

**PFOA 13**  

### C **4** 

### - **PFOA**

**3M LIMS ID Description**  **Concentration**

**(ng/m L)**  **%Recovery %Recovery** 

GLP10

- 01

- 01

- 30

- 037 DAL

- GW

- 607L

- 0

- 120403 0.557 NA 96.6

GLP10

- 01

- 01

- 30

- 038 DAL

- GW

- 607L

- DB

- 120403 0.542 NA 91.0

GLP10

- 01

- 01

- 30

- 039 DAL

- GW

- 607L

- FMS

- 120403 1.66 114 101

**Average Concentration (ng/mL) ±**  **%RPD /RSD**  **0.550 ng/mL**  **± 2.7**  **% 96.3**  **% ±**  **5.3 %** 

NA = Not Applicable

All samples were quantitated by internal standard calibration.



### Table 21. DAL GW 609R 120330

**PFOA 13**  

### C **4** 

### - **PFOA**

**3M LIMS ID Description**  **Concentration**

**(ng/mL) %Recovery**  **%Recovery**

GLP10

- 01

- 01

- 30

- 040 DAL

- GW

- 609R

- 0

- 120330 0.418 NA 98.2

GLP10

- 01

- 01

- 30

- 041 DAL

- GW

- 609R

- DB

- 120330 0.382 NA 90.2

GLP10

- 01

- 01

- 30

- 042 DAL

- GW

- 609R

- FMS

- 120330 1.46 109 106

**Average Concentration (ng/mL) ±**  **%RPD /RSD**  **0.400 ng/mL**  **± 9.0**  **% 98.2**  **% ±**  **8.2 %** 

NA = Not Applicable

All samples were quantitated by internal standard calibration.

### Table 22. DAL GW 609L 120330

**PFOA 13**  

### C **4** 

### - **PFOA**

**3M LIMS ID Description**  **Concentration**

**(ng/mL) %Recovery**  **%Recovery**

GLP10

- 01

- 01

- 30

- 043 DAL

- GW

- 609L

- 0

- 120330 0.718 NA 98.0

GLP10

- 01

- 01

- 30

- 044 DAL

- GW

- 609L

- DB

- 120330 0.671 NA 103

G LP10

- 01

- 01

- 30

- 045 DAL

- GW

- 609L

- FMS

- 120330 2.68 102 96.9

**Average Concentration (ng/mL) ±**  **%RPD /RSD**  **0.695 ng/mL**  **± 6.8**  **% 99.4**  **% ±**  **3.4 %** 

NA = Not Applicable

All samples were quantitated by internal standard calibration.



### Table 23. DAL GW 610R 120404

**PFOA 13**  

### C **4** 

### - **PFOA**

**3M LIMS ID Description**  **Concentration**

**(ng/mL) %Recovery**  **%Recovery**

GLP10

- 01

- 01

- 30

- 046 DAL

- GW

- 610R

- 0

- 120404 1.75 NA 95.9

GLP10

- 01

- 01

- 30

- 047 DAL

- GW

- 610R

- DB

- 120404 1.74 NA 90.3

GLP10

- 01

- 01

- 30

- 048 DAL

- GW

- 610R

- FMS

- 120404 2.84 112 98.7

**Average Concentra tion (ng/mL)**  **± %RPD**  **/RSD 1.75**  **ng/mL ±**  **0.57 %**  **95.0 %**  **± 4.5**  **%**

NA = Not Applicable

All samples were quantitated by internal standard calibration.



### Table 24. DAL GW 610L 120404

**PFOA 13**  

### C **4** 

### - **PFOA**

**3M LIMS ID Description**  **Concentration**

**(ng/mL) %Recovery**  **%Recovery**

GLP10

- 01

- 01

- 30

- 049 DAL

- GW

- 610L

- 0

- 120404 3.09 NA 97.5

GLP10

- 01

- 01

- 30

- 050 DAL

- GW

- 610L

- DB

- 120404 2.86 NA 92.6

GLP10

- 01

- 01

- 30

- 051 DAL

- GW

- 610L

- FMS

- 120404 4.80 93.7 99.0

**Average Concentration (ng/mL) ±**  **%RPD /RSD**  **2.98 ng/mL**  **± 7.7**  **% 96.4**  **% ±**  **3.5 %** 

NA = Not Applic able

All samples were quantitated by internal standard calibration.

### Table 25. DAL GW 611R 120404

**PFOA 13**  

### C **4** 

### - **PFOA**

**3M LIMS ID Description**  **Concentration**

**(ng/mL) %Recovery**  **%Recovery**

GLP10

- 01

- 01

- 30

- 052 DAL

- GW

- 611R

- 0

- 120404 0.579 NA 95.9

GLP10

- 01

- 0 1

- 30

- 053 DAL

- GW

- 611R

- DB

- 120404 0.582 NA 96.9

GLP10

- 01

- 01

- 30

- 054 DAL

- GW

- 611R

- FMS

- 120404 1.62 107 107

**Average Concentration (ng/mL) ±**  **%RPD /RSD**  **0.581 ng/mL**  **± 0.52**  **% 100**  **% ±**  **6.3 %** 

NA = Not Applicable

All samples were quantitated by internal standard calibrati on.



### Table 26. DAL GW 611L 120404

**PFOA 13**  

### C **4** 

### - **PFOA**

**3M LIMS ID Description**  **Concentration**

**(ng/mL) %Recovery**  **%Recovery**

GLP10

- 01

- 01

- 30

- 055 DAL

- GW

- 611L

- 0

- 120404 0.506 NA 96.6

GLP10

- 01

- 01

- 30

- 056 DAL

- GW

- 611L

- DB

- 120404 0.501 NA 94.1

GLP10

- 01

- 01

- 30

- 057 DAL

- GW

- 611L

- FMS

- 120404 1.68 121 105

**Average Concentration (ng/mL) ±**  **%RPD /RSD**  **0.504 ng/mL**  **± 0.99**  **% 98.6**  **% ±**  **5.9 %** 

NA = Not Applicable

All samples were quantitated by internal standard calibration.



### Table 27. DAL GW MW121 120405

**PFOA 13**  

### C **4** 

### - **PFOA**

**3M LIMS ID Descrip**  **tion Concentration** 

**(ng/mL) %Recovery**  **%Recovery**

GLP10

- 01

- 01

- 30

- 058 DAL

- GW

- MW121

- 0

- 120405 0.0552 NA 92.4

GLP10

- 01

- 01

- 30

- 059 DAL

- GW

- MW121

- DB

- 120405 0.0579 NA 103

GLP10

- 01

- 01

- 30

- 060 DAL

- GW

- MW121

- FMS

- 120405 1.05 102 95.3

**Average Concentration (ng/mL) ±**  **%RP D** 

**/RSD 0.0566**  **ng/mL ±**  **4.8% 97.0**  **% ±**  **5.8 %** 

NA = Not Applicable

All samples were quantitated by internal standard calibration.

### Table 28. DAL GW MW47 120405

**PFOA 13**  

### C **4** 

### - **PFOA**

**3M LIMS ID Description**  **Concentration**

**(ng/mL) %Recovery**  **%Recovery**

GLP10

- 01

- 01

- 3 0

- 061 DAL

- GW

- MW47

- 0

- 120405 0.233 NA 97.4

GLP10

- 01

- 01

- 30

- 062 DAL

- GW

- MW47

- DB

- 120405 0.251 NA 104

GLP10

- 01

- 01

- 30

- 063 DAL

- GW

- MW47

- FMS

- 120405 1.14 92.2 97.3

**Average Concentration (ng/mL) ±**  **%RPD /RSD**  **0.242 ng/mL**  **± 7.4%**  **99.6 %**  **± 4.0**  **%**

NA = Not Applicable

All s amples were quantitated by internal standard calibration.



### Table 29. DAL GW MW 13S 120404

**PFOA 13**  

### C **4** 

### - **PFOA**

**3M LIMS ID Description**  **Concentration**

**(ng/mL) %Recovery**  **%Recovery**

GLP10

- 01

- 01

- 30

- 064 DAL

- GW

- MW13S

- 0

- 120404 <0.0240 NA 96.0

GLP10

- 01

- 01

- 30

- 065 DAL

- G W

- MW13S

- DB

- 120404 <0.0240 NA 97.6

GLP10

- 01

- 01

- 30

- 066 DAL

- GW

- MW13S

- FMS

- 120404 1.05 108 101

**Average Concentration (ng/mL) ±**  **%RPD /RSD**  **<0.0240 ng/mL**  **98.3 %**  **± 2.7**  **%**

NA = Not Applicable

All samples were quantitated by internal standard calibration.



### Table 30. DAL GW MW13I 120404

**PFOA 13**  

### C **4** 

### - **PFOA**

**3M LIMS ID Description**  **Concentration**

**(ng/mL) %Recovery**  **%Recovery**

GLP10

- 01

- 01

- 30

- 067 DAL

- GW

- MW13I

- 0

- 120404 0.0505 NA 94.3

GLP10

- 01

- 01

- 30

- 068 DAL

- GW

- MW13I

- DB

- 120404 0.0545 NA 97.7

GLP10

- 01

- 01

- 30

- 069 DAL

- GW

- MW13I

- FMS

- 120404 1.07 104 101

**Average Concentration (ng/mL) ±**  **%RPD /RSD**  **0.0525 ng/mL**  **± 7.6%**  **97.7 %**  **± 3.5**  **%**

NA = Not Applicable

All samples were quantitated by internal standard calibration.

### Table 31. DAL GW MW13B 120404

**PFOA 13**  

### C **4** 

### - **PFOA**

**3M LIMS ID Description**  **Concentration**

**(ng/mL) %Recovery**  **%Recovery**

GLP10

- 01

- 01

- 30

- 070 DAL

- GW

- MW13B

- 0

- 120404 0.0854 NA 92.7

GLP10

- 01

- 01

- 30

- 071 DAL

- GW

- MW13B

- DB

- 120404 0.0846 NA 99.1

GLP10

- 01

- 01

- 30

- 072 DAL

- GW

- MW13B

- FMS

- 120404 1.06 100 98.9

**Average Concentration (ng/mL) ±**  **%RPD /R** 

**SD 0.0850**  **ng/mL ±**  **0.94% 96.9**  **% ±**  **3.8 %** 

NA = Not Applicable

All samples were quantitated by internal standard calibration.



### Table 32. Equipment Rinseate Blanks

**PFOA 13**  

### C **4** 

### - **PFOA**

**3M LIMS ID Description**  **Concentration**

**(ng/mL) %Recovery**  **%Recovery**

GLP10

- 01

- 01

- 30

- 073 DAL

- GW

- 604L

- RB

- 120403 <0.0240 NA 100

GLP10

- 01

- 01

- 30

- 074 DAL

- GW

- 607R

- RB

- 120403 <0.0240 NA 101

NA = Not Applicable

All samples were quantitated by internal standard calibration.



### Table 33. Trip Blanks

**PFOA 13**  

### C **4** 

### - **PFOA**

**3M LIMS ID Description**  **Concen tration** 

**(ng/mL) %Recovery**  **%Recovery**

GLP10

- 01

- 01

- 30

- 075 DAL

- GW

- TRIP01

- 0

- 120316 <0.0240 NA 91.6

GLP10

- 01

- 01

- 30

- 076 DAL

- GW

- TRIP01

- FMS

- 120316 1.03 106 103

NA = Not Applicable

All samples were quantitated by internal standard calibration.

## 9 C **onclusion**

Laboratory control spikes and field m atrix spikes were used to determine the analytical method

accuracy and precision for PFOA

. A nalysis was successfully completed following 3M Environme ntal

Laboratory method ETS -8- 044. 1 described herein.



## 10 **Dat a/Sample Retention** 

All remaining sample s and associated project data (hardcopy and electronic) will be archived according

to 3M Environmental Laboratory standard operating procedures.



## 11 **Attachments**

Attachment A: Protocol Amendment 30 (General Project Outl ine) and

Protocol Amendment 34 (Sampling Locations Not Collected)

Attachment B: Representative Chromatograms and Calibration Curves

Attachment C : Analytical Method

– ETS -8- 044. 1GLP10-01-01 ; Interi m Repor t 3 0

Analysi s o f PFO A I n Groundwate r

Off-Sit e Well s I n Decatur

, A L

- March/Apri l 201 2



## 12 Signatures

Clesto n tange

, Ph.D.

, 3 M Principa l Analytica l Investigato r Dat e



# ^f^^^-- ^ \ //^^-^/ ^

Willia m K

. Reagen

, Ph.D.

, 3 M Environmenta l Laborator y Manage r Dat e

Gar y Hohenstein

, 3lwSponso r Representativ e Dat e

Jaisimh a Kesa K Stud y Directo r 7 ' Dat e

Pag e 2 7 o f 9 7

# A TTACHMENT 

# A: P ROTOCOL 

# A MENDMENT S

# A TTACHMENT 

# B: R EPRESENTATIVE 

# S AMPLE 

# C HROMATOGRAMS AND



# C ALIBRATION 

# C URVE 

# ( S 

# )b120418a.rdb (13C4PFOA-Surr): "Quadratic" Regression ("1 / x" weighting): y = -0.034 x^2 + 1.01 x + 0.0253 (r = 0.9994)0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0 6.5 7.0 7.5 8.0 8.5 9.0 9.5 10.0Analyte Conc. / IS Conc.0.00.51.01.52.02.53.03.54.04.55.05.56.06.56.9

Analyte Area / IS AreaWorkstation: ETSBUSTERBatch Name: b120418a.dab*Data worked up by KJUPage 1 of 1Printing Time: 12:45:05 PMPrinting Date: Monday, April 23, 2012b120418a.rdb (PFOA): "Quadratic" Regression ("1 / x" weighting): y = -0.0219 x^2 + 1.5 x + 0.00439 (r = 0.9999)0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24Analyte Conc. / IS Conc.0123456789101112131415161718192021222324

Analyte Area / IS AreaWorkstation: ETSBUSTERBatch Name: b120418a.dab*Data worked up by KJUPage 1 of 1Printing Time: 12:44:49 PMPrinting Date: Monday, April 23, 2012Sample Name: "b120418a017" Sample ID: "11012-62-8" File: "b120418a.wiff"Peak Name: "13C4PFOA-Surr" Mass(es): "417.0/372.0 amu"Comment: "1.0 ng/mL FC std in Synth. Water" Annotation: ""Sample Index: 17Sample Type: StandardConcentration: 0.998 ng/mLCalculated Conc: 1.07 ng/mLAcq. Date: 4/18/2012Acq. Time: 7:17:13 PMModified: NoProc. Algorithm: IntelliQuan - IQAMin. Peak Height: 0.00 cpsMin. Peak Width: 0.00 secSmoothing Width: 0 pointsRT Window: 30.0 secExpected RT: 15.6 minUse Relative RT: NoInt. Type: ValleyRetention Time: 15.6 minArea: 3298731 countsHeight: 1.07e+006 cpsStart Time: 15.5 minEnd Time: 15.9 min13.5 14.0 14.5 15.0 15.5 16.0 16.5 17.0 17.5 18.0Time, min0.005.00e41.00e51.50e52.00e52.50e53.00e53.50e54.00e54.50e55.00e55.50e56.00e56.50e57.00e57.50e58.00e58.50e59.00e59.50e51.00e61.05e6

Intensity, cps15.63Sample Name: "b120418a023" Sample ID: "12001-1" File: "b120418a.wiff"Peak Name: "13C4PFOA-Surr" Mass(es): "417.0/372.0 amu"Comment: "Method Blank" Annotation: ""Sample Index: 23Sample Type: UnknownConcentration: N/ACalculated Conc: < 0Acq. Date: 4/18/2012Acq. Time: 9:26:07 PMModified: NoProc. Algorithm: IntelliQuan - IQAMin. Peak Height: 0.00 cpsMin. Peak Width: 0.00 secSmoothing Width: 0 pointsRT Window: 30.0 secExpected RT: 15.6 minUse Relative RT: NoInt. Type: ValleyRetention Time: 15.6 minArea: 88571 countsHeight: 3.06e+004 cpsStart Time: 15.6 minEnd Time: 15.7 min13.5 14.0 14.5 15.0 15.5 16.0 16.5 17.0 17.5 18.0Time, min0.02000.04000.06000.08000.01.0e41.2e41.4e41.6e41.8e42.0e42.2e42.4e42.6e42.8e43.0e4

Intensity, cpsSample Name: "b120418a026" Sample ID: "LCS-120416-1" File: "b120418a.wiff"Peak Name: "13C4PFOA-Surr" Mass(es): "417.0/372.0 amu"Comment: "0.2ppb LCS" Annotation: ""Sample Index: 26Sample Type: QCConcentration: 0.198 ng/mLCalculated Conc: 0.207 ng/mLAcq. Date: 4/18/2012Acq. Time: 10:30:41 PMModified: NoProc. Algorithm: IntelliQuan - IQAMin. Peak Height: 0.00 cpsMin. Peak Width: 0.00 secSmoothing Width: 0 pointsRT Window: 30.0 secExpected RT: 15.6 minUse Relative RT: NoInt. Type: ValleyRetention Time: 15.6 minArea: 763105 countsHeight: 2.62e+005 cpsStart Time: 15.6 minEnd Time: 15.8 min13.5 14.0 14.5 15.0 15.5 16.0 16.5 17.0 17.5 18.0Time, min0.01.0e42.0e43.0e44.0e45.0e46.0e47.0e48.0e49.0e41.0e51.1e51.2e51.3e51.4e51.5e51.6e51.7e51.8e51.9e52.0e52.1e52.2e52.3e52.4e52.5e52.6e5

Intensity, cps15.65Sample Name: "b120418a029" Sample ID: "LCS-120416-4" File: "b120418a.wiff"Peak Name: "13C4PFOA-Surr" Mass(es): "417.0/372.0 amu"Comment: "2ppb LCS" Annotation: ""Sample Index: 29Sample Type: QCConcentration: 1.98 ng/mLCalculated Conc: 2.06 ng/mLAcq. Date: 4/18/2012Acq. Time: 11:35:06 PMModified: NoProc. Algorithm: IntelliQuan - IQAMin. Peak Height: 0.00 cpsMin. Peak Width: 0.00 secSmoothing Width: 0 pointsRT Window: 30.0 secExpected RT: 15.6 minUse Relative RT: NoInt. Type: ValleyRetention Time: 15.6 minArea: 6276592 countsHeight: 1.95e+006 cpsStart Time: 15.5 minEnd Time: 15.9 min13.5 14.0 14.5 15.0 15.5 16.0 16.5 17.0 17.5 18.0Time, min0.01.0e52.0e53.0e54.0e55.0e56.0e57.0e58.0e59.0e51.0e61.1e61.2e61.3e61.4e61.5e61.6e61.7e61.8e61.9e6

Intensity, cps15.64*** Buster J2930203Batch Name: b120418a.dabData printed by STWPrinting Time: 11:14:11 AMPrinting Date: Thursday, May 03, 2012Page 1 of 28Sample Name: "b120418a032" Sample ID: "LCS-120416-7" File: "b120418a.wiff"Peak Name: "13C4PFOA-Surr" Mass(es): "417.0/372.0 amu"Comment: "10ppb LCS" Annotation: ""Sample Index: 32Sample Type: QCConcentration: 0.00 ng/mLCalculated Conc: < 0Acq. Date: 4/19/2012Acq. Time: 12:39:30 AMModified: NoProc. Algorithm: IntelliQuan - IQAMin. Peak Height: 0.00 cpsMin. Peak Width: 0.00 secSmoothing Width: 0 pointsRT Window: 30.0 secExpected RT: 15.6 minUse Relative RT: NoInt. Type: ValleyRetention Time: 15.6 minArea: 66421 countsHeight: 2.17e+004 cpsStart Time: 15.6 minEnd Time: 15.7 min13.5 14.0 14.5 15.0 15.5 16.0 16.5 17.0 17.5 18.0Time, min0.01000.02000.03000.04000.05000.06000.07000.08000.09000.01.0e41.1e41.2e41.3e41.4e41.5e41.6e41.7e41.8e41.9e42.0e42.1e4

Intensity, cpsSample Name: "b120418a041" Sample ID: "GLP10-01-01-30-007" File: "b120418a.wiff"Peak Name: "13C4PFOA-Surr" Mass(es): "417.0/372.0 amu"Comment: "DAL-GW-602L-0-" Annotation: ""Sample Index: 41Sample Type: UnknownConcentration: N/ACalculated Conc: 0.0967 ng/mLAcq. Date: 4/19/2012Acq. Time: 3:53:11 AMModified: NoProc. Algorithm: IntelliQuan - IQAMin. Peak Height: 0.00 cpsMin. Peak Width: 0.00 secSmoothing Width: 0 pointsRT Window: 30.0 secExpected RT: 15.6 minUse Relative RT: NoInt. Type: ValleyRetention Time: 15.6 minArea: 392734 countsHeight: 1.37e+005 cpsStart Time: 15.5 minEnd Time: 15.8 min13.5 14.0 14.5 15.0 15.5 16.0 16.5 17.0 17.5 18.0Time, min0.05000.01.0e41.5e42.0e42.5e43.0e43.5e44.0e44.5e45.0e45.5e46.0e46.5e47.0e47.5e48.0e48.5e49.0e49.5e41.0e51.1e51.1e51.2e51.2e51.3e51.3e51.4e5

Intensity, cps15.63Sample Name: "b120418a044" Sample ID: "GLP10-01-01-30-013" File: "b120418a.wiff"Peak Name: "13C4PFOA-Surr" Mass(es): "417.0/372.0 amu"Comment: "DAL-GW-603S-0-" Annotation: ""Sample Index: 44Sample Type: UnknownConcentration: N/ACalculated Conc: 0.108 ng/mLAcq. Date: 4/19/2012Acq. Time: 4:57:35 AMModified: NoProc. Algorithm: IntelliQuan - IQAMin. Peak Height: 0.00 cpsMin. Peak Width: 0.00 secSmoothing Width: 0 pointsRT Window: 30.0 secExpected RT: 15.6 minUse Relative RT: NoInt. Type: ValleyRetention Time: 15.6 minArea: 381934 countsHeight: 1.31e+005 cpsStart Time: 15.5 minEnd Time: 15.7 min13.5 14.0 14.5 15.0 15.5 16.0 16.5 17.0 17.5 18.0Time, min0.05000.01.0e41.5e42.0e42.5e43.0e43.5e44.0e44.5e45.0e45.5e46.0e46.5e47.0e47.5e48.0e48.5e49.0e49.5e41.0e51.1e51.1e51.2e51.2e51.3e51.3e5

Intensity, cps15.63Sample Name: "b120418a050" Sample ID: "GLP10-01-01-30-016" File: "b120418a.wiff"Peak Name: "13C4PFOA-Surr" Mass(es): "417.0/372.0 amu"Comment: "DAL-GW-603L-0-" Annotation: ""Sample Index: 50Sample Type: UnknownConcentration: N/ACalculated Conc: 0.0953 ng/mLAcq. Date: 4/19/2012Acq. Time: 7:06:35 AMModified: NoProc. Algorithm: IntelliQuan - IQAMin. Peak Height: 0.00 cpsMin. Peak Width: 0.00 secSmoothing Width: 0 pointsRT Window: 30.0 secExpected RT: 15.6 minUse Relative RT: NoInt. Type: ValleyRetention Time: 15.6 minArea: 406186 countsHeight: 1.54e+005 cpsStart Time: 15.5 minEnd Time: 15.7 min13.5 14.0 14.5 15.0 15.5 16.0 16.5 17.0 17.5 18.0Time, min0.01.0e42.0e43.0e44.0e45.0e46.0e47.0e48.0e49.0e41.0e51.1e51.2e51.3e51.4e51.5e5

Intensity, cps15.63*** Buster J2930203Batch Name: b120418a.dabData printed by STWPrinting Time: 11:14:11 AMPrinting Date: Thursday, May 03, 2012Page 2 of 28Sample Name: "b120418a053" Sample ID: "GLP10-01-01-30-019" File: "b120418a.wiff"Peak Name: "13C4PFOA-Surr" Mass(es): "417.0/372.0 amu"Comment: "DAL-GW-604R-0-" Annotation: ""Sample Index: 53Sample Type: UnknownConcentration: N/ACalculated Conc: 0.107 ng/mLAcq. Date: 4/19/2012Acq. Time: 8:11:06 AMModified: NoProc. Algorithm: IntelliQuan - IQAMin. Peak Height: 0.00 cpsMin. Peak Width: 0.00 secSmoothing Width: 0 pointsRT Window: 30.0 secExpected RT: 15.6 minUse Relative RT: NoInt. Type: ValleyRetention Time: 15.6 minArea: 392403 countsHeight: 1.45e+005 cpsStart Time: 15.5 minEnd Time: 15.7 min13.5 14.0 14.5 15.0 15.5 16.0 16.5 17.0 17.5 18.0Time, min0.01.0e42.0e43.0e44.0e45.0e46.0e47.0e48.0e49.0e41.0e51.1e51.2e51.3e51.4e5

Intensity, cps15.62Sample Name: "b120418a055" Sample ID: "GLP10-01-01-30-021" File: "b120418a.wiff"Peak Name: "13C4PFOA-Surr" Mass(es): "417.0/372.0 amu"Comment: "DAL-GW-604R-FMS-" Annotation: ""Sample Index: 55Sample Type: UnknownConcentration: N/ACalculated Conc: 0.102 ng/mLAcq. Date: 4/19/2012Acq. Time: 8:54:05 AMModified: NoProc. Algorithm: IntelliQuan - IQAMin. Peak Height: 0.00 cpsMin. Peak Width: 0.00 secSmoothing Width: 0 pointsRT Window: 30.0 secExpected RT: 15.6 minUse Relative RT: NoInt. Type: ValleyRetention Time: 15.6 minArea: 392386 countsHeight: 1.41e+005 cpsStart Time: 15.5 minEnd Time: 15.7 min13.5 14.0 14.5 15.0 15.5 16.0 16.5 17.0 17.5 18.0Time, min0.01.0e42.0e43.0e44.0e45.0e46.0e47.0e48.0e49.0e41.0e51.1e51.2e51.3e51.4e5

Intensity, cps15.62Sample Name: "b120418a056" Sample ID: "GLP10-01-01-30-022" File: "b120418a.wiff"Peak Name: "13C4PFOA-Surr" Mass(es): "417.0/372.0 amu"Comment: "DAL-GW-604S-0-" Annotation: ""Sample Index: 56Sample Type: UnknownConcentration: N/ACalculated Conc: 0.0989 ng/mLAcq. Date: 4/19/2012Acq. Time: 9:15:39 AMModified: NoProc. Algorithm: IntelliQuan - IQAMin. Peak Height: 0.00 cpsMin. Peak Width: 0.00 secSmoothing Width: 0 pointsRT Window: 30.0 secExpected RT: 15.6 minUse Relative RT: NoInt. Type: ValleyRetention Time: 15.6 minArea: 387487 countsHeight: 1.33e+005 cpsStart Time: 15.5 minEnd Time: 15.8 min13.5 14.0 14.5 15.0 15.5 16.0 16.5 17.0 17.5 18.0Time, min0.05000.01.0e41.5e42.0e42.5e43.0e43.5e44.0e44.5e45.0e45.5e46.0e46.5e47.0e47.5e48.0e48.5e49.0e49.5e41.0e51.1e51.1e51.2e51.2e51.3e51.3e5

Intensity, cps15.61Sample Name: "b120418a062" Sample ID: "GLP10-01-01-30-025" File: "b120418a.wiff"Peak Name: "13C4PFOA-Surr" Mass(es): "417.0/372.0 amu"Comment: "DAL-GW-604L-0-" Annotation: ""Sample Index: 62Sample Type: UnknownConcentration: N/ACalculated Conc: 0.0983 ng/mLAcq. Date: 4/19/2012Acq. Time: 11:24:37 AMModified: NoProc. Algorithm: IntelliQuan - IQAMin. Peak Height: 0.00 cpsMin. Peak Width: 0.00 secSmoothing Width: 0 pointsRT Window: 30.0 secExpected RT: 15.6 minUse Relative RT: NoInt. Type: ValleyRetention Time: 15.6 minArea: 329304 countsHeight: 1.11e+005 cpsStart Time: 15.5 minEnd Time: 15.8 min13.5 14.0 14.5 15.0 15.5 16.0 16.5 17.0 17.5 18.0Time, min0.005000.001.00e41.50e42.00e42.50e43.00e43.50e44.00e44.50e45.00e45.50e46.00e46.50e47.00e47.50e48.00e48.50e49.00e49.50e41.00e51.05e51.10e5

Intensity, cps15.62*** Buster J2930203Batch Name: b120418a.dabData printed by STWPrinting Time: 11:14:11 AMPrinting Date: Thursday, May 03, 2012Page 3 of 28Sample Name: "b120418a065" Sample ID: "GLP10-01-01-30-028" File: "b120418a.wiff"Peak Name: "13C4PFOA-Surr" Mass(es): "417.0/372.0 amu"Comment: "DAL-GW-605R-0-" Annotation: ""Sample Index: 65Sample Type: UnknownConcentration: N/ACalculated Conc: 0.0989 ng/mLAcq. Date: 4/19/2012Acq. Time: 12:29:13 PMModified: NoProc. Algorithm: IntelliQuan - IQAMin. Peak Height: 0.00 cpsMin. Peak Width: 0.00 secSmoothing Width: 0 pointsRT Window: 30.0 secExpected RT: 15.6 minUse Relative RT: NoInt. Type: ValleyRetention Time: 15.6 minArea: 370753 countsHeight: 1.33e+005 cpsStart Time: 15.5 minEnd Time: 15.7 min13.5 14.0 14.5 15.0 15.5 16.0 16.5 17.0 17.5 18.0Time, min0.05000.01.0e41.5e42.0e42.5e43.0e43.5e44.0e44.5e45.0e45.5e46.0e46.5e47.0e47.5e48.0e48.5e49.0e49.5e41.0e51.1e51.1e51.2e51.2e51.3e51.3e5

Intensity, cps15.61Sample Name: "b120418a068" Sample ID: "GLP10-01-01-30-031" File: "b120418a.wiff"Peak Name: "13C4PFOA-Surr" Mass(es): "417.0/372.0 amu"Comment: "DAL-GW-605L-0-" Annotation: ""Sample Index: 68Sample Type: UnknownConcentration: N/ACalculated Conc: 0.110 ng/mLAcq. Date: 4/19/2012Acq. Time: 1:33:36 PMModified: NoProc. Algorithm: IntelliQuan - IQAMin. Peak Height: 0.00 cpsMin. Peak Width: 0.00 secSmoothing Width: 0 pointsRT Window: 30.0 secExpected RT: 15.6 minUse Relative RT: NoInt. Type: ValleyRetention Time: 15.6 minArea: 391497 countsHeight: 1.33e+005 cpsStart Time: 15.5 minEnd Time: 15.7 min13.5 14.0 14.5 15.0 15.5 16.0 16.5 17.0 17.5 18.0Time, min0.05000.01.0e41.5e42.0e42.5e43.0e43.5e44.0e44.5e45.0e45.5e46.0e46.5e47.0e47.5e48.0e48.5e49.0e49.5e41.0e51.1e51.1e51.2e51.2e51.3e51.3e5

Intensity, cps15.62Sample Name: "b120418a070" Sample ID: "GLP10-01-01-30-033" File: "b120418a.wiff"Peak Name: "13C4PFOA-Surr" Mass(es): "417.0/372.0 amu"Comment: "DAL-GW-605L-FMS-" Annotation: ""Sample Index: 70Sample Type: UnknownConcentration: N/ACalculated Conc: 0.0973 ng/mLAcq. Date: 4/19/2012Acq. Time: 2:16:34 PMModified: NoProc. Algorithm: IntelliQuan - IQAMin. Peak Height: 0.00 cpsMin. Peak Width: 0.00 secSmoothing Width: 0 pointsRT Window: 30.0 secExpected RT: 15.6 minUse Relative RT: NoInt. Type: ValleyRetention Time: 15.6 minArea: 367255 countsHeight: 1.33e+005 cpsStart Time: 15.5 minEnd Time: 15.7 min13.5 14.0 14.5 15.0 15.5 16.0 16.5 17.0 17.5 18.0Time, min0.05000.01.0e41.5e42.0e42.5e43.0e43.5e44.0e44.5e45.0e45.5e46.0e46.5e47.0e47.5e48.0e48.5e49.0e49.5e41.0e51.1e51.1e51.2e51.2e51.3e51.3e5

Intensity, cps15.62Sample Name: "b120418a074" Sample ID: "GLP10-01-01-30-034" File: "b120418a.wiff"Peak Name: "13C4PFOA-Surr" Mass(es): "417.0/372.0 amu"Comment: "DAL-GW-607R-0-" Annotation: ""Sample Index: 74Sample Type: UnknownConcentration: N/ACalculated Conc: 0.0975 ng/mLAcq. Date: 4/19/2012Acq. Time: 3:42:35 PMModified: NoProc. Algorithm: IntelliQuan - IQAMin. Peak Height: 0.00 cpsMin. Peak Width: 0.00 secSmoothing Width: 0 pointsRT Window: 30.0 secExpected RT: 15.6 minUse Relative RT: NoInt. Type: ValleyRetention Time: 15.6 minArea: 389175 countsHeight: 1.39e+005 cpsStart Time: 15.5 minEnd Time: 15.7 min13.5 14.0 14.5 15.0 15.5 16.0 16.5 17.0 17.5 18.0Time, min0.05000.01.0e41.5e42.0e42.5e43.0e43.5e44.0e44.5e45.0e45.5e46.0e46.5e47.0e47.5e48.0e48.5e49.0e49.5e41.0e51.1e51.1e51.2e51.2e51.3e51.3e51.4e5

Intensity, cps15.62*** Buster J2930203Batch Name: b120418a.dabData printed by STWPrinting Time: 11:14:11 AMPrinting Date: Thursday, May 03, 2012Page 4 of 28Sample Name: "b120418a077" Sample ID: "GLP10-01-01-30-037" File: "b120418a.wiff"Peak Name: "13C4PFOA-Surr" Mass(es): "417.0/372.0 amu"Comment: "DAL-GW-607L-0-" Annotation: ""Sample Index: 77Sample Type: UnknownConcentration: N/ACalculated Conc: 0.0964 ng/mLAcq. Date: 4/19/2012Acq. Time: 4:47:09 PMModified: NoProc. Algorithm: IntelliQuan - IQAMin. Peak Height: 0.00 cpsMin. Peak Width: 0.00 secSmoothing Width: 0 pointsRT Window: 30.0 secExpected RT: 15.6 minUse Relative RT: NoInt. Type: ValleyRetention Time: 15.6 minArea: 357194 countsHeight: 1.25e+005 cpsStart Time: 15.5 minEnd Time: 15.8 min13.5 14.0 14.5 15.0 15.5 16.0 16.5 17.0 17.5 18.0Time, min0.005000.001.00e41.50e42.00e42.50e43.00e43.50e44.00e44.50e45.00e45.50e46.00e46.50e47.00e47.50e48.00e48.50e49.00e49.50e41.00e51.05e51.10e51.15e51.20e51.25e5

Intensity, cps15.62Sample Name: "b120418a080" Sample ID: "GLP10-01-01-30-040" File: "b120418a.wiff"Peak Name: "13C4PFOA-Surr" Mass(es): "417.0/372.0 amu"Comment: "DAL-GW-609R-0-" Annotation: ""Sample Index: 80Sample Type: UnknownConcentration: N/ACalculated Conc: 0.0980 ng/mLAcq. Date: 4/19/2012Acq. Time: 5:51:44 PMModified: NoProc. Algorithm: IntelliQuan - IQAMin. Peak Height: 0.00 cpsMin. Peak Width: 0.00 secSmoothing Width: 0 pointsRT Window: 30.0 secExpected RT: 15.6 minUse Relative RT: NoInt. Type: ValleyRetention Time: 15.6 minArea: 376714 countsHeight: 1.37e+005 cpsStart Time: 15.5 minEnd Time: 15.7 min13.5 14.0 14.5 15.0 15.5 16.0 16.5 17.0 17.5 18.0Time, min0.05000.01.0e41.5e42.0e42.5e43.0e43.5e44.0e44.5e45.0e45.5e46.0e46.5e47.0e47.5e48.0e48.5e49.0e49.5e41.0e51.1e51.1e51.2e51.2e51.3e51.3e51.4e5

Intensity, cps15.62Sample Name: "b120418a086" Sample ID: "GLP10-01-01-30-043" File: "b120418a.wiff"Peak Name: "13C4PFOA-Surr" Mass(es): "417.0/372.0 amu"Comment: "DAL-GW-609L-0-" Annotation: ""Sample Index: 86Sample Type: UnknownConcentration: N/ACalculated Conc: 0.0978 ng/mLAcq. Date: 4/19/2012Acq. Time: 8:00:44 PMModified: NoProc. Algorithm: IntelliQuan - IQAMin. Peak Height: 0.00 cpsMin. Peak Width: 0.00 secSmoothing Width: 0 pointsRT Window: 30.0 secExpected RT: 15.6 minUse Relative RT: NoInt. Type: ValleyRetention Time: 15.6 minArea: 371101 countsHeight: 1.34e+005 cpsStart Time: 15.5 minEnd Time: 15.7 min13.5 14.0 14.5 15.0 15.5 16.0 16.5 17.0 17.5 18.0Time, min0.05000.01.0e41.5e42.0e42.5e43.0e43.5e44.0e44.5e45.0e45.5e46.0e46.5e47.0e47.5e48.0e48.5e49.0e49.5e41.0e51.1e51.1e51.2e51.2e51.3e51.3e5

Intensity, cps15.62Sample Name: "b120418a088" Sample ID: "GLP10-01-01-30-045" File: "b120418a.wiff"Peak Name: "13C4PFOA-Surr" Mass(es): "417.0/372.0 amu"Comment: "DAL-GW-609L-FMS-" Annotation: ""Sample Index: 88Sample Type: UnknownConcentration: N/ACalculated Conc: 0.0967 ng/mLAcq. Date: 4/19/2012Acq. Time: 8:43:42 PMModified: NoProc. Algorithm: IntelliQuan - IQAMin. Peak Height: 0.00 cpsMin. Peak Width: 0.00 secSmoothing Width: 0 pointsRT Window: 30.0 secExpected RT: 15.6 minUse Relative RT: NoInt. Type: ValleyRetention Time: 15.6 minArea: 366208 countsHeight: 1.27e+005 cpsStart Time: 15.5 minEnd Time: 15.8 min13.5 14.0 14.5 15.0 15.5 16.0 16.5 17.0 17.5 18.0Time, min0.005000.001.00e41.50e42.00e42.50e43.00e43.50e44.00e44.50e45.00e45.50e46.00e46.50e47.00e47.50e48.00e48.50e49.00e49.50e41.00e51.05e51.10e51.15e51.20e51.25e5

Intensity, cps15.62*** Buster J2930203Batch Name: b120418a.dabData printed by STWPrinting Time: 11:14:11 AMPrinting Date: Thursday, May 03, 2012Page 5 of 28Sample Name: "b120418a089" Sample ID: "GLP10-01-01-30-046" File: "b120418a.wiff"Peak Name: "13C4PFOA-Surr" Mass(es): "417.0/372.0 amu"Comment: "DAL-GW-610R-0-" Annotation: ""Sample Index: 89Sample Type: UnknownConcentration: N/ACalculated Conc: 0.0957 ng/mLAcq. Date: 4/19/2012Acq. Time: 9:05:15 PMModified: NoProc. Algorithm: IntelliQuan - IQAMin. Peak Height: 0.00 cpsMin. Peak Width: 0.00 secSmoothing Width: 0 pointsRT Window: 30.0 secExpected RT: 15.6 minUse Relative RT: NoInt. Type: ValleyRetention Time: 15.6 minArea: 387183 countsHeight: 1.33e+005 cpsStart Time: 15.5 minEnd Time: 15.8 min13.5 14.0 14.5 15.0 15.5 16.0 16.5 17.0 17.5 18.0Time, min0.05000.01.0e41.5e42.0e42.5e43.0e43.5e44.0e44.5e45.0e45.5e46.0e46.5e47.0e47.5e48.0e48.5e49.0e49.5e41.0e51.1e51.1e51.2e51.2e51.3e51.3e5

Intensity, cps15.62Sample Name: "b120418a092" Sample ID: "GLP10-01-01-30-049" File: "b120418a.wiff"Peak Name: "13C4PFOA-Surr" Mass(es): "417.0/372.0 amu"Comment: "DAL-GW-610L-0-" Annotation: ""Sample Index: 92Sample Type: UnknownConcentration: N/ACalculated Conc: 0.0973 ng/mLAcq. Date: 4/19/2012Acq. Time: 10:09:49 PMModified: NoProc. Algorithm: IntelliQuan - IQAMin. Peak Height: 0.00 cpsMin. Peak Width: 0.00 secSmoothing Width: 0 pointsRT Window: 30.0 secExpected RT: 15.6 minUse Relative RT: NoInt. Type: ValleyRetention Time: 15.6 minArea: 350284 countsHeight: 1.17e+005 cpsStart Time: 15.5 minEnd Time: 15.7 min13.5 14.0 14.5 15.0 15.5 16.0 16.5 17.0 17.5 18.0Time, min0.005000.001.00e41.50e42.00e42.50e43.00e43.50e44.00e44.50e45.00e45.50e46.00e46.50e47.00e47.50e48.00e48.50e49.00e49.50e41.00e51.05e51.10e51.15e5

Intensity, cps15.63Sample Name: "b120418a098" Sample ID: "GLP10-01-01-30-052" File: "b120418a.wiff"Peak Name: "13C4PFOA-Surr" Mass(es): "417.0/372.0 amu"Comment: "DAL-GW-611R-0-" Annotation: ""Sample Index: 98Sample Type: UnknownConcentration: N/ACalculated Conc: 0.0957 ng/mLAcq. Date: 4/20/2012Acq. Time: 12:19:09 AMModified: NoProc. Algorithm: IntelliQuan - IQAMin. Peak Height: 0.00 cpsMin. Peak Width: 0.00 secSmoothing Width: 0 pointsRT Window: 30.0 secExpected RT: 15.6 minUse Relative RT: NoInt. Type: ValleyRetention Time: 15.6 minArea: 387415 countsHeight: 1.37e+005 cpsStart Time: 15.5 minEnd Time: 15.8 min13.5 14.0 14.5 15.0 15.5 16.0 16.5 17.0 17.5 18.0Time, min0.05000.01.0e41.5e42.0e42.5e43.0e43.5e44.0e44.5e45.0e45.5e46.0e46.5e47.0e47.5e48.0e48.5e49.0e49.5e41.0e51.1e51.1e51.2e51.2e51.3e51.3e51.4e5

Intensity, cps15.62Sample Name: "b120418a101" Sample ID: "GLP10-01-01-30-055" File: "b120418a.wiff"Peak Name: "13C4PFOA-Surr" Mass(es): "417.0/372.0 amu"Comment: "DAL-GW-611L-0-" Annotation: ""Sample Index: 101Sample Type: UnknownConcentration: N/ACalculated Conc: 0.0964 ng/mLAcq. Date: 4/20/2012Acq. Time: 1:23:52 AMModified: NoProc. Algorithm: IntelliQuan - IQAMin. Peak Height: 0.00 cpsMin. Peak Width: 0.00 secSmoothing Width: 0 pointsRT Window: 30.0 secExpected RT: 15.6 minUse Relative RT: NoInt. Type: ValleyRetention Time: 15.6 minArea: 376373 countsHeight: 1.32e+005 cpsStart Time: 15.5 minEnd Time: 15.8 min13.5 14.0 14.5 15.0 15.5 16.0 16.5 17.0 17.5 18.0Time, min0.05000.01.0e41.5e42.0e42.5e43.0e43.5e44.0e44.5e45.0e45.5e46.0e46.5e47.0e47.5e48.0e48.5e49.0e49.5e41.0e51.1e51.1e51.2e51.2e51.3e51.3e5

Intensity, cps15.62*** Buster J2930203Batch Name: b120418a.dabData printed by STWPrinting Time: 11:14:11 AMPrinting Date: Thursday, May 03, 2012Page 6 of 28Sample Name: "b120418a103" Sample ID: "GLP10-01-01-30-057" File: "b120418a.wiff"Peak Name: "13C4PFOA-Surr" Mass(es): "417.0/372.0 amu"Comment: "DAL-GW-611L-FMS-" Annotation: ""Sample Index: 103Sample Type: UnknownConcentration: N/ACalculated Conc: 0.105 ng/mLAcq. Date: 4/20/2012Acq. Time: 2:06:59 AMModified: NoProc. Algorithm: IntelliQuan - IQAMin. Peak Height: 0.00 cpsMin. Peak Width: 0.00 secSmoothing Width: 0 pointsRT Window: 30.0 secExpected RT: 15.6 minUse Relative RT: NoInt. Type: ValleyRetention Time: 15.6 minArea: 360665 countsHeight: 1.34e+005 cpsStart Time: 15.5 minEnd Time: 15.7 min13.5 14.0 14.5 15.0 15.5 16.0 16.5 17.0 17.5 18.0Time, min0.05000.01.0e41.5e42.0e42.5e43.0e43.5e44.0e44.5e45.0e45.5e46.0e46.5e47.0e47.5e48.0e48.5e49.0e49.5e41.0e51.1e51.1e51.2e51.2e51.3e51.3e5

Intensity, cps15.62Sample Name: "b120418a104" Sample ID: "GLP10-01-01-30-058" File: "b120418a.wiff"Peak Name: "13C4PFOA-Surr" Mass(es): "417.0/372.0 amu"Comment: "DAL-GW-MW121-0-" Annotation: ""Sample Index: 104Sample Type: UnknownConcentration: N/ACalculated Conc: 0.0922 ng/mLAcq. Date: 4/20/2012Acq. Time: 2:28:33 AMModified: NoProc. Algorithm: IntelliQuan - IQAMin. Peak Height: 0.00 cpsMin. Peak Width: 0.00 secSmoothing Width: 0 pointsRT Window: 30.0 secExpected RT: 15.6 minUse Relative RT: NoInt. Type: ValleyRetention Time: 15.6 minArea: 379430 countsHeight: 1.37e+005 cpsStart Time: 15.5 minEnd Time: 15.7 min13.5 14.0 14.5 15.0 15.5 16.0 16.5 17.0 17.5 18.0Time, min0.05000.01.0e41.5e42.0e42.5e43.0e43.5e44.0e44.5e45.0e45.5e46.0e46.5e47.0e47.5e48.0e48.5e49.0e49.5e41.0e51.1e51.1e51.2e51.2e51.3e51.3e51.4e5

Intensity, cps15.63Sample Name: "b120418a106" Sample ID: "GLP10-01-01-30-060" File: "b120418a.wiff"Peak Name: "13C4PFOA-Surr" Mass(es): "417.0/372.0 amu"Comment: "DAL-GW-MW121-FMS-" Annotation: ""Sample Index: 106Sample Type: UnknownConcentration: N/ACalculated Conc: 0.0951 ng/mLAcq. Date: 4/20/2012Acq. Time: 3:11:40 AMModified: NoProc. Algorithm: IntelliQuan - IQAMin. Peak Height: 0.00 cpsMin. Peak Width: 0.00 secSmoothing Width: 0 pointsRT Window: 30.0 secExpected RT: 15.6 minUse Relative RT: NoInt. Type: ValleyRetention Time: 15.6 minArea: 405115 countsHeight: 1.40e+005 cpsStart Time: 15.5 minEnd Time: 15.8 min13.5 14.0 14.5 15.0 15.5 16.0 16.5 17.0 17.5 18.0Time, min0.05000.01.0e41.5e42.0e42.5e43.0e43.5e44.0e44.5e45.0e45.5e46.0e46.5e47.0e47.5e48.0e48.5e49.0e49.5e41.0e51.1e51.1e51.2e51.2e51.3e51.3e51.4e5

Intensity, cps15.62Sample Name: "b120418a110" Sample ID: "GLP10-01-01-30-061" File: "b120418a.wiff"Peak Name: "13C4PFOA-Surr" Mass(es): "417.0/372.0 amu"Comment: "DAL-GW-MW47-0-" Annotation: ""Sample Index: 110Sample Type: UnknownConcentration: N/ACalculated Conc: 0.0838 ng/mLAcq. Date: 4/20/2012Acq. Time: 4:37:44 AMModified: NoProc. Algorithm: IntelliQuan - IQAMin. Peak Height: 0.00 cpsMin. Peak Width: 0.00 secSmoothing Width: 0 pointsRT Window: 30.0 secExpected RT: 15.6 minUse Relative RT: NoInt. Type: ValleyRetention Time: 15.6 minArea: 368062 countsHeight: 1.30e+005 cpsStart Time: 15.5 minEnd Time: 15.8 min13.5 14.0 14.5 15.0 15.5 16.0 16.5 17.0 17.5 18.0Time, min0.005000.001.00e41.50e42.00e42.50e43.00e43.50e44.00e44.50e45.00e45.50e46.00e46.50e47.00e47.50e48.00e48.50e49.00e49.50e41.00e51.05e51.10e51.15e51.20e51.25e5

Intensity, cps15.63*** Buster J2930203Batch Name: b120418a.dabData printed by STWPrinting Time: 11:14:11 AMPrinting Date: Thursday, May 03, 2012Page 7 of 28Sample Name: "b120418a112" Sample ID: "GLP10-01-01-30-063" File: "b120418a.wiff"Peak Name: "13C4PFOA-Surr" Mass(es): "417.0/372.0 amu"Comment: "DAL-GW-MW47-FMS-" Annotation: ""Sample Index: 112Sample Type: UnknownConcentration: N/ACalculated Conc: 0.0971 ng/mLAcq. Date: 4/20/2012Acq. Time: 5:20:49 AMModified: NoProc. Algorithm: IntelliQuan - IQAMin. Peak Height: 0.00 cpsMin. Peak Width: 0.00 secSmoothing Width: 0 pointsRT Window: 30.0 secExpected RT: 15.6 minUse Relative RT: NoInt. Type: ValleyRetention Time: 15.6 minArea: 421814 countsHeight: 1.48e+005 cpsStart Time: 15.5 minEnd Time: 15.8 min13.5 14.0 14.5 15.0 15.5 16.0 16.5 17.0 17.5 18.0Time, min0.01.0e42.0e43.0e44.0e45.0e46.0e47.0e48.0e49.0e41.0e51.1e51.2e51.3e51.4e5

Intensity, cps15.62Sample Name: "b120418a113" Sample ID: "GLP10-01-01-30-064" File: "b120418a.wiff"Peak Name: "13C4PFOA-Surr" Mass(es): "417.0/372.0 amu"Comment: "DAL-GW-MW13S-0-" Annotation: ""Sample Index: 113Sample Type: UnknownConcentration: N/ACalculated Conc: 0.0958 ng/mLAcq. Date: 4/20/2012Acq. Time: 5:42:19 AMModified: NoProc. Algorithm: IntelliQuan - IQAMin. Peak Height: 0.00 cpsMin. Peak Width: 0.00 secSmoothing Width: 0 pointsRT Window: 30.0 secExpected RT: 15.6 minUse Relative RT: NoInt. Type: ValleyRetention Time: 15.6 minArea: 417868 countsHeight: 1.52e+005 cpsStart Time: 15.5 minEnd Time: 15.7 min13.5 14.0 14.5 15.0 15.5 16.0 16.5 17.0 17.5 18.0Time, min0.01.0e42.0e43.0e44.0e45.0e46.0e47.0e48.0e49.0e41.0e51.1e51.2e51.3e51.4e51.5e5

Intensity, cps15.62Sample Name: "b120418a116" Sample ID: "GLP10-01-01-30-067" File: "b120418a.wiff"Peak Name: "13C4PFOA-Surr" Mass(es): "417.0/372.0 amu"Comment: "DAL-GW-MW13I-0-" Annotation: ""Sample Index: 116Sample Type: UnknownConcentration: N/ACalculated Conc: 0.0941 ng/mLAcq. Date: 4/20/2012Acq. Time: 6:46:56 AMModified: NoProc. Algorithm: IntelliQuan - IQAMin. Peak Height: 0.00 cpsMin. Peak Width: 0.00 secSmoothing Width: 0 pointsRT Window: 30.0 secExpected RT: 15.6 minUse Relative RT: NoInt. Type: ValleyRetention Time: 15.6 minArea: 424226 countsHeight: 1.49e+005 cpsStart Time: 15.5 minEnd Time: 15.8 min13.5 14.0 14.5 15.0 15.5 16.0 16.5 17.0 17.5 18.0Time, min0.01.0e42.0e43.0e44.0e45.0e46.0e47.0e48.0e49.0e41.0e51.1e51.2e51.3e51.4e5

Intensity, cps15.61Sample Name: "b120418a122" Sample ID: "GLP10-01-01-30-070" File: "b120418a.wiff"Peak Name: "13C4PFOA-Surr" Mass(es): "417.0/372.0 amu"Comment: "DAL-GW-MW13B-0-" Annotation: ""Sample Index: 122Sample Type: UnknownConcentration: N/ACalculated Conc: 0.0925 ng/mLAcq. Date: 4/20/2012Acq. Time: 8:56:05 AMModified: NoProc. Algorithm: IntelliQuan - IQAMin. Peak Height: 0.00 cpsMin. Peak Width: 0.00 secSmoothing Width: 0 pointsRT Window: 30.0 secExpected RT: 15.6 minUse Relative RT: NoInt. Type: ValleyRetention Time: 15.6 minArea: 401948 countsHeight: 1.49e+005 cpsStart Time: 15.5 minEnd Time: 15.7 min13.5 14.0 14.5 15.0 15.5 16.0 16.5 17.0 17.5 18.0Time, min0.01.0e42.0e43.0e44.0e45.0e46.0e47.0e48.0e49.0e41.0e51.1e51.2e51.3e51.4e5

Intensity, cps15.61*** Buster J2930203Batch Name: b120418a.dabData printed by STWPrinting Time: 11:14:12 AMPrinting Date: Thursday, May 03, 2012Page 8 of 28Sample Name: "b120418a124" Sample ID: "GLP10-01-01-30-072" File: "b120418a.wiff"Peak Name: "13C4PFOA-Surr" Mass(es): "417.0/372.0 amu"Comment: "DAL-GW-MW13B-FMS-" Annotation: ""Sample Index: 124Sample Type: UnknownConcentration: N/ACalculated Conc: 0.0987 ng/mLAcq. Date: 4/20/2012Acq. Time: 9:39:06 AMModified: NoProc. Algorithm: IntelliQuan - IQAMin. Peak Height: 0.00 cpsMin. Peak Width: 0.00 secSmoothing Width: 0 pointsRT Window: 30.0 secExpected RT: 15.6 minUse Relative RT: NoInt. Type: ValleyRetention Time: 15.6 minArea: 416784 countsHeight: 1.45e+005 cpsStart Time: 15.5 minEnd Time: 15.8 min13.5 14.0 14.5 15.0 15.5 16.0 16.5 17.0 17.5 18.0Time, min0.01.0e42.0e43.0e44.0e45.0e46.0e47.0e48.0e49.0e41.0e51.1e51.2e51.3e51.4e5

Intensity, cps15.60Sample Name: "b120418a125" Sample ID: "GLP10-01-01-30-073" File: "b120418a.wiff"Peak Name: "13C4PFOA-Surr" Mass(es): "417.0/372.0 amu"Comment: "DAL-GW-604L-RB-" Annotation: ""Sample Index: 125Sample Type: UnknownConcentration: N/ACalculated Conc: 0.100 ng/mLAcq. Date: 4/20/2012Acq. Time: 10:00:31 AMModified: NoProc. Algorithm: IntelliQuan - IQAMin. Peak Height: 0.00 cpsMin. Peak Width: 0.00 secSmoothing Width: 0 pointsRT Window: 30.0 secExpected RT: 15.6 minUse Relative RT: NoInt. Type: ValleyRetention Time: 15.6 minArea: 423428 countsHeight: 1.52e+005 cpsStart Time: 15.5 minEnd Time: 15.7 min13.5 14.0 14.5 15.0 15.5 16.0 16.5 17.0 17.5 18.0Time, min0.01.0e42.0e43.0e44.0e45.0e46.0e47.0e48.0e49.0e41.0e51.1e51.2e51.3e51.4e51.5e5

Intensity, cps15.61Sample Name: "b120418a126" Sample ID: "GLP10-01-01-30-074" File: "b120418a.wiff"Peak Name: "13C4PFOA-Surr" Mass(es): "417.0/372.0 amu"Comment: "DAL-GW-607R-RB-" Annotation: ""Sample Index: 126Sample Type: UnknownConcentration: N/ACalculated Conc: 0.101 ng/mLAcq. Date: 4/20/2012Acq. Time: 10:22:03 AMModified: NoProc. Algorithm: IntelliQuan - IQAMin. Peak Height: 0.00 cpsMin. Peak Width: 0.00 secSmoothing Width: 0 pointsRT Window: 30.0 secExpected RT: 15.6 minUse Relative RT: NoInt. Type: ValleyRetention Time: 15.6 minArea: 407210 countsHeight: 1.56e+005 cpsStart Time: 15.5 minEnd Time: 15.8 min13.5 14.0 14.5 15.0 15.5 16.0 16.5 17.0 17.5 18.0Time, min0.01.0e42.0e43.0e44.0e45.0e46.0e47.0e48.0e49.0e41.0e51.1e51.2e51.3e51.4e51.5e5

Intensity, cps15.61Sample Name: "b120418a127" Sample ID: "GLP10-01-01-30-075" File: "b120418a.wiff"Peak Name: "13C4PFOA-Surr" Mass(es): "417.0/372.0 amu"Comment: "DAL-GW-TRIP01-0-" Annotation: ""Sample Index: 127Sample Type: UnknownConcentration: N/ACalculated Conc: 0.0914 ng/mLAcq. Date: 4/20/2012Acq. Time: 10:43:37 AMModified: NoProc. Algorithm: IntelliQuan - IQAMin. Peak Height: 0.00 cpsMin. Peak Width: 0.00 secSmoothing Width: 0 pointsRT Window: 30.0 secExpected RT: 15.6 minUse Relative RT: NoInt. Type: ValleyRetention Time: 15.6 minArea: 460932 countsHeight: 1.61e+005 cpsStart Time: 15.5 minEnd Time: 15.8 min13.5 14.0 14.5 15.0 15.5 16.0 16.5 17.0 17.5 18.0Time, min0.01.0e42.0e43.0e44.0e45.0e46.0e47.0e48.0e49.0e41.0e51.1e51.2e51.3e51.4e51.5e51.6e5

Intensity, cps15.61*** Buster J2930203Batch Name: b120418a.dabData printed by STWPrinting Time: 11:14:12 AMPrinting Date: Thursday, May 03, 2012Page 9 of 28Sample Name: "b120418a128" Sample ID: "GLP10-01-01-30-076" File: "b120418a.wiff"Peak Name: "13C4PFOA-Surr" Mass(es): "417.0/372.0 amu"Comment: "DAL-GW-TRIP01-FMS-" Annotation: ""Sample Index: 128Sample Type: UnknownConcentration: N/ACalculated Conc: 0.103 ng/mLAcq. Date: 4/20/2012Acq. Time: 11:05:06 AMModified: NoProc. Algorithm: IntelliQuan - IQAMin. Peak Height: 0.00 cpsMin. Peak Width: 0.00 secSmoothing Width: 0 pointsRT Window: 30.0 secExpected RT: 15.6 minUse Relative RT: NoInt. Type: ValleyRetention Time: 15.6 minArea: 433377 countsHeight: 1.55e+005 cpsStart Time: 15.5 minEnd Time: 15.7 min13.5 14.0 14.5 15.0 15.5 16.0 16.5 17.0 17.5 18.0Time, min0.01.0e42.0e43.0e44.0e45.0e46.0e47.0e48.0e49.0e41.0e51.1e51.2e51.3e51.4e51.5e5

Intensity, cps15.60Sample Name: "b120418a017" Sample ID: "11012-62-8" File: "b120418a.wiff"Peak Name: "13C8PFOA-IS(IS)" Mass(es): "421.0/376.0 amu"Comment: "1.0 ng/mL FC std in Synth. Water" Annotation: ""Sample Index: 17Sample Type: StandardConcentration: 1.00 ng/mLCalculated Conc: N/AAcq. Date: 4/18/2012Acq. Time: 7:17:13 PMModified: YesProc. Algorithm: IntelliQuan - IQAMin. Peak Height: 0.00 cpsMin. Peak Width: 0.00 secSmoothing Width: 0 pointsRT Window: 30.0 secExpected RT: 15.6 minUse Relative RT: NoInt. Type: ValleyRetention Time: 15.6 minArea: 3101487 countsHeight: 1.10e+006 cpsStart Time: 15.5 minEnd Time: 15.8 min13.5 14.0 14.5 15.0 15.5 16.0 16.5 17.0 17.5 18.0Time, min0.005.00e41.00e51.50e52.00e52.50e53.00e53.50e54.00e54.50e55.00e55.50e56.00e56.50e57.00e57.50e58.00e58.50e59.00e59.50e51.00e61.05e61.10e6

Intensity, cps15.63Sample Name: "b120418a023" Sample ID: "12001-1" File: "b120418a.wiff"Peak Name: "13C8PFOA-IS(IS)" Mass(es): "421.0/376.0 amu"Comment: "Method Blank" Annotation: ""Sample Index: 23Sample Type: UnknownConcentration: 1.00 ng/mLCalculated Conc: N/AAcq. Date: 4/18/2012Acq. Time: 9:26:07 PMModified: NoProc. Algorithm: IntelliQuan - IQAMin. Peak Height: 0.00 cpsMin. Peak Width: 0.00 secSmoothing Width: 0 pointsRT Window: 30.0 secExpected RT: 15.6 minUse Relative RT: NoInt. Type: ValleyRetention Time: 15.6 minArea: 3856498 countsHeight: 1.28e+006 cpsStart Time: 15.5 minEnd Time: 15.9 min13.5 14.0 14.5 15.0 15.5 16.0 16.5 17.0 17.5 18.0Time, min0.005.00e41.00e51.50e52.00e52.50e53.00e53.50e54.00e54.50e55.00e55.50e56.00e56.50e57.00e57.50e58.00e58.50e59.00e59.50e51.00e61.05e61.10e61.15e61.20e61.25e6

Intensity, cps15.65Sample Name: "b120418a026" Sample ID: "LCS-120416-1" File: "b120418a.wiff"Peak Name: "13C8PFOA-IS(IS)" Mass(es): "421.0/376.0 amu"Comment: "0.2ppb LCS" Annotation: ""Sample Index: 26Sample Type: QCConcentration: 0.991 ng/mLCalculated Conc: N/AAcq. Date: 4/18/2012Acq. Time: 10:30:41 PMModified: YesProc. Algorithm: IntelliQuan - IQAMin. Peak Height: 0.00 cpsMin. Peak Width: 0.00 secSmoothing Width: 0 pointsRT Window: 30.0 secExpected RT: 15.6 minUse Relative RT: NoInt. Type: ValleyRetention Time: 15.6 minArea: 3265080 countsHeight: 1.09e+006 cpsStart Time: 15.5 minEnd Time: 15.9 min13.5 14.0 14.5 15.0 15.5 16.0 16.5 17.0 17.5 18.0Time, min0.005.00e41.00e51.50e52.00e52.50e53.00e53.50e54.00e54.50e55.00e55.50e56.00e56.50e57.00e57.50e58.00e58.50e59.00e59.50e51.00e61.05e6

Intensity, cps15.64*** Buster J2930203Batch Name: b120418a.dabData printed by STWPrinting Time: 11:14:12 AMPrinting Date: Thursday, May 03, 2012Page 10 of 28Sample Name: "b120418a029" Sample ID: "LCS-120416-4" File: "b120418a.wiff"Peak Name: "13C8PFOA-IS(IS)" Mass(es): "421.0/376.0 amu"Comment: "2ppb LCS" Annotation: ""Sample Index: 29Sample Type: QCConcentration: 0.991 ng/mLCalculated Conc: N/AAcq. Date: 4/18/2012Acq. Time: 11:35:06 PMModified: YesProc. Algorithm: IntelliQuan - IQAMin. Peak Height: 0.00 cpsMin. Peak Width: 0.00 secSmoothing Width: 0 pointsRT Window: 30.0 secExpected RT: 15.6 minUse Relative RT: NoInt. Type: ValleyRetention Time: 15.6 minArea: 3186400 countsHeight: 1.04e+006 cpsStart Time: 15.5 minEnd Time: 15.9 min13.5 14.0 14.5 15.0 15.5 16.0 16.5 17.0 17.5 18.0Time, min0.005.00e41.00e51.50e52.00e52.50e53.00e53.50e54.00e54.50e55.00e55.50e56.00e56.50e57.00e57.50e58.00e58.50e59.00e59.50e51.00e6

Intensity, cps15.64Sample Name: "b120418a032" Sample ID: "LCS-120416-7" File: "b120418a.wiff"Peak Name: "13C8PFOA-IS(IS)" Mass(es): "421.0/376.0 amu"Comment: "10ppb LCS" Annotation: ""Sample Index: 32Sample Type: QCConcentration: 0.994 ng/mLCalculated Conc: N/AAcq. Date: 4/19/2012Acq. Time: 12:39:30 AMModified: YesProc. Algorithm: IntelliQuan - IQAMin. Peak Height: 0.00 cpsMin. Peak Width: 0.00 secSmoothing Width: 0 pointsRT Window: 30.0 secExpected RT: 15.6 minUse Relative RT: NoInt. Type: ValleyRetention Time: 15.6 minArea: 3004781 countsHeight: 9.72e+005 cpsStart Time: 15.5 minEnd Time: 15.9 min13.5 14.0 14.5 15.0 15.5 16.0 16.5 17.0 17.5 18.0Time, min0.05.0e41.0e51.5e52.0e52.5e53.0e53.5e54.0e54.5e55.0e55.5e56.0e56.5e57.0e57.5e58.0e58.5e59.0e59.5e5

Intensity, cps15.63Sample Name: "b120418a041" Sample ID: "GLP10-01-01-30-007" File: "b120418a.wiff"Peak Name: "13C8PFOA-IS(IS)" Mass(es): "421.0/376.0 amu"Comment: "DAL-GW-602L-0-" Annotation: ""Sample Index: 41Sample Type: UnknownConcentration: 1.00 ng/mLCalculated Conc: N/AAcq. Date: 4/19/2012Acq. Time: 3:53:11 AMModified: YesProc. Algorithm: IntelliQuan - IQAMin. Peak Height: 0.00 cpsMin. Peak Width: 0.00 secSmoothing Width: 0 pointsRT Window: 30.0 secExpected RT: 15.6 minUse Relative RT: NoInt. Type: ValleyRetention Time: 15.6 minArea: 3211840 countsHeight: 1.06e+006 cpsStart Time: 15.5 minEnd Time: 15.9 min13.5 14.0 14.5 15.0 15.5 16.0 16.5 17.0 17.5 18.0Time, min0.005.00e41.00e51.50e52.00e52.50e53.00e53.50e54.00e54.50e55.00e55.50e56.00e56.50e57.00e57.50e58.00e58.50e59.00e59.50e51.00e61.05e6

Intensity, cps15.63Sample Name: "b120418a044" Sample ID: "GLP10-01-01-30-013" File: "b120418a.wiff"Peak Name: "13C8PFOA-IS(IS)" Mass(es): "421.0/376.0 amu"Comment: "DAL-GW-603S-0-" Annotation: ""Sample Index: 44Sample Type: UnknownConcentration: 1.00 ng/mLCalculated Conc: N/AAcq. Date: 4/19/2012Acq. Time: 4:57:35 AMModified: YesProc. Algorithm: IntelliQuan - IQAMin. Peak Height: 0.00 cpsMin. Peak Width: 0.00 secSmoothing Width: 0 pointsRT Window: 30.0 secExpected RT: 15.6 minUse Relative RT: NoInt. Type: ValleyRetention Time: 15.6 minArea: 2850985 countsHeight: 9.46e+005 cpsStart Time: 15.5 minEnd Time: 15.8 min13.5 14.0 14.5 15.0 15.5 16.0 16.5 17.0 17.5 18.0Time, min0.05.0e41.0e51.5e52.0e52.5e53.0e53.5e54.0e54.5e55.0e55.5e56.0e56.5e57.0e57.5e58.0e58.5e59.0e5

Intensity, cps15.63*** Buster J2930203Batch Name: b120418a.dabData printed by STWPrinting Time: 11:14:12 AMPrinting Date: Thursday, May 03, 2012Page 11 of 28Sample Name: "b120418a050" Sample ID: "GLP10-01-01-30-016" File: "b120418a.wiff"Peak Name: "13C8PFOA-IS(IS)" Mass(es): "421.0/376.0 amu"Comment: "DAL-GW-603L-0-" Annotation: ""Sample Index: 50Sample Type: UnknownConcentration: 1.00 ng/mLCalculated Conc: N/AAcq. Date: 4/19/2012Acq. Time: 7:06:35 AMModified: NoProc. Algorithm: IntelliQuan - IQAMin. Peak Height: 0.00 cpsMin. Peak Width: 0.00 secSmoothing Width: 0 pointsRT Window: 30.0 secExpected RT: 15.6 minUse Relative RT: NoInt. Type: ValleyRetention Time: 15.6 minArea: 3359684 countsHeight: 1.13e+006 cpsStart Time: 15.5 minEnd Time: 15.8 min13.5 14.0 14.5 15.0 15.5 16.0 16.5 17.0 17.5 18.0Time, min0.005.00e41.00e51.50e52.00e52.50e53.00e53.50e54.00e54.50e55.00e55.50e56.00e56.50e57.00e57.50e58.00e58.50e59.00e59.50e51.00e61.05e61.10e6

Intensity, cps15.63Sample Name: "b120418a053" Sample ID: "GLP10-01-01-30-019" File: "b120418a.wiff"Peak Name: "13C8PFOA-IS(IS)" Mass(es): "421.0/376.0 amu"Comment: "DAL-GW-604R-0-" Annotation: ""Sample Index: 53Sample Type: UnknownConcentration: 1.00 ng/mLCalculated Conc: N/AAcq. Date: 4/19/2012Acq. Time: 8:11:06 AMModified: YesProc. Algorithm: IntelliQuan - IQAMin. Peak Height: 0.00 cpsMin. Peak Width: 0.00 secSmoothing Width: 0 pointsRT Window: 30.0 secExpected RT: 15.6 minUse Relative RT: NoInt. Type: ValleyRetention Time: 15.6 minArea: 2954467 countsHeight: 1.01e+006 cpsStart Time: 15.5 minEnd Time: 15.8 min13.5 14.0 14.5 15.0 15.5 16.0 16.5 17.0 17.5 18.0Time, min0.005.00e41.00e51.50e52.00e52.50e53.00e53.50e54.00e54.50e55.00e55.50e56.00e56.50e57.00e57.50e58.00e58.50e59.00e59.50e51.00e6

Intensity, cps15.61Sample Name: "b120418a055" Sample ID: "GLP10-01-01-30-021" File: "b120418a.wiff"Peak Name: "13C8PFOA-IS(IS)" Mass(es): "421.0/376.0 amu"Comment: "DAL-GW-604R-FMS-" Annotation: ""Sample Index: 55Sample Type: UnknownConcentration: 1.00 ng/mLCalculated Conc: N/AAcq. Date: 4/19/2012Acq. Time: 8:54:05 AMModified: YesProc. Algorithm: IntelliQuan - IQAMin. Peak Height: 0.00 cpsMin. Peak Width: 0.00 secSmoothing Width: 0 pointsRT Window: 30.0 secExpected RT: 15.6 minUse Relative RT: NoInt. Type: ValleyRetention Time: 15.6 minArea: 3078839 countsHeight: 1.03e+006 cpsStart Time: 15.5 minEnd Time: 15.9 min13.5 14.0 14.5 15.0 15.5 16.0 16.5 17.0 17.5 18.0Time, min0.005.00e41.00e51.50e52.00e52.50e53.00e53.50e54.00e54.50e55.00e55.50e56.00e56.50e57.00e57.50e58.00e58.50e59.00e59.50e51.00e6

Intensity, cps15.62Sample Name: "b120418a056" Sample ID: "GLP10-01-01-30-022" File: "b120418a.wiff"Peak Name: "13C8PFOA-IS(IS)" Mass(es): "421.0/376.0 amu"Comment: "DAL-GW-604S-0-" Annotation: ""Sample Index: 56Sample Type: UnknownConcentration: 1.00 ng/mLCalculated Conc: N/AAcq. Date: 4/19/2012Acq. Time: 9:15:39 AMModified: YesProc. Algorithm: IntelliQuan - IQAMin. Peak Height: 0.00 cpsMin. Peak Width: 0.00 secSmoothing Width: 0 pointsRT Window: 30.0 secExpected RT: 15.6 minUse Relative RT: NoInt. Type: ValleyRetention Time: 15.6 minArea: 3113854 countsHeight: 1.06e+006 cpsStart Time: 15.5 minEnd Time: 15.8 min13.5 14.0 14.5 15.0 15.5 16.0 16.5 17.0 17.5 18.0Time, min0.005.00e41.00e51.50e52.00e52.50e53.00e53.50e54.00e54.50e55.00e55.50e56.00e56.50e57.00e57.50e58.00e58.50e59.00e59.50e51.00e61.05e6

Intensity, cps15.61*** Buster J2930203Batch Name: b120418a.dabData printed by STWPrinting Time: 11:14:12 AMPrinting Date: Thursday, May 03, 2012Page 12 of 28Sample Name: "b120418a062" Sample ID: "GLP10-01-01-30-025" File: "b120418a.wiff"Peak Name: "13C8PFOA-IS(IS)" Mass(es): "421.0/376.0 amu"Comment: "DAL-GW-604L-0-" Annotation: ""Sample Index: 62Sample Type: UnknownConcentration: 1.00 ng/mLCalculated Conc: N/AAcq. Date: 4/19/2012Acq. Time: 11:24:37 AMModified: NoProc. Algorithm: IntelliQuan - IQAMin. Peak Height: 0.00 cpsMin. Peak Width: 0.00 secSmoothing Width: 0 pointsRT Window: 30.0 secExpected RT: 15.6 minUse Relative RT: NoInt. Type: ValleyRetention Time: 15.6 minArea: 2659004 countsHeight: 9.18e+005 cpsStart Time: 15.5 minEnd Time: 15.8 min13.5 14.0 14.5 15.0 15.5 16.0 16.5 17.0 17.5 18.0Time, min0.05.0e41.0e51.5e52.0e52.5e53.0e53.5e54.0e54.5e55.0e55.5e56.0e56.5e57.0e57.5e58.0e58.5e59.0e5

Intensity, cps15.62Sample Name: "b120418a065" Sample ID: "GLP10-01-01-30-028" File: "b120418a.wiff"Peak Name: "13C8PFOA-IS(IS)" Mass(es): "421.0/376.0 amu"Comment: "DAL-GW-605R-0-" Annotation: ""Sample Index: 65Sample Type: UnknownConcentration: 1.00 ng/mLCalculated Conc: N/AAcq. Date: 4/19/2012Acq. Time: 12:29:13 PMModified: NoProc. Algorithm: IntelliQuan - IQAMin. Peak Height: 0.00 cpsMin. Peak Width: 0.00 secSmoothing Width: 0 pointsRT Window: 30.0 secExpected RT: 15.6 minUse Relative RT: NoInt. Type: ValleyRetention Time: 15.6 minArea: 2977482 countsHeight: 1.01e+006 cpsStart Time: 15.5 minEnd Time: 15.8 min13.5 14.0 14.5 15.0 15.5 16.0 16.5 17.0 17.5 18.0Time, min0.005.00e41.00e51.50e52.00e52.50e53.00e53.50e54.00e54.50e55.00e55.50e56.00e56.50e57.00e57.50e58.00e58.50e59.00e59.50e51.00e6

Intensity, cps15.62Sample Name: "b120418a068" Sample ID: "GLP10-01-01-30-031" File: "b120418a.wiff"Peak Name: "13C8PFOA-IS(IS)" Mass(es): "421.0/376.0 amu"Comment: "DAL-GW-605L-0-" Annotation: ""Sample Index: 68Sample Type: UnknownConcentration: 1.00 ng/mLCalculated Conc: N/AAcq. Date: 4/19/2012Acq. Time: 1:33:36 PMModified: YesProc. Algorithm: IntelliQuan - IQAMin. Peak Height: 0.00 cpsMin. Peak Width: 0.00 secSmoothing Width: 0 pointsRT Window: 30.0 secExpected RT: 15.6 minUse Relative RT: NoInt. Type: Base To BaseRetention Time: 15.6 minArea: 2883165 countsHeight: 1.01e+006 cpsStart Time: 15.5 minEnd Time: 15.8 min13.5 14.0 14.5 15.0 15.5 16.0 16.5 17.0 17.5 18.0Time, min0.005.00e41.00e51.50e52.00e52.50e53.00e53.50e54.00e54.50e55.00e55.50e56.00e56.50e57.00e57.50e58.00e58.50e59.00e59.50e51.00e6

Intensity, cps15.62Sample Name: "b120418a070" Sample ID: "GLP10-01-01-30-033" File: "b120418a.wiff"Peak Name: "13C8PFOA-IS(IS)" Mass(es): "421.0/376.0 amu"Comment: "DAL-GW-605L-FMS-" Annotation: ""Sample Index: 70Sample Type: UnknownConcentration: 1.00 ng/mLCalculated Conc: N/AAcq. Date: 4/19/2012Acq. Time: 2:16:34 PMModified: YesProc. Algorithm: IntelliQuan - IQAMin. Peak Height: 0.00 cpsMin. Peak Width: 0.00 secSmoothing Width: 0 pointsRT Window: 30.0 secExpected RT: 15.6 minUse Relative RT: NoInt. Type: ValleyRetention Time: 15.6 minArea: 2988503 countsHeight: 1.02e+006 cpsStart Time: 15.5 minEnd Time: 15.8 min13.5 14.0 14.5 15.0 15.5 16.0 16.5 17.0 17.5 18.0Time, min0.005.00e41.00e51.50e52.00e52.50e53.00e53.50e54.00e54.50e55.00e55.50e56.00e56.50e57.00e57.50e58.00e58.50e59.00e59.50e51.00e6

Intensity, cps15.62*** Buster J2930203Batch Name: b120418a.dabData printed by STWPrinting Time: 11:14:12 AMPrinting Date: Thursday, May 03, 2012Page 13 of 28Sample Name: "b120418a074" Sample ID: "GLP10-01-01-30-034" File: "b120418a.wiff"Peak Name: "13C8PFOA-IS(IS)" Mass(es): "421.0/376.0 amu"Comment: "DAL-GW-607R-0-" Annotation: ""Sample Index: 74Sample Type: UnknownConcentration: 1.00 ng/mLCalculated Conc: N/AAcq. Date: 4/19/2012Acq. Time: 3:42:35 PMModified: YesProc. Algorithm: IntelliQuan - IQAMin. Peak Height: 0.00 cpsMin. Peak Width: 0.00 secSmoothing Width: 0 pointsRT Window: 30.0 secExpected RT: 15.6 minUse Relative RT: NoInt. Type: ValleyRetention Time: 15.6 minArea: 3161480 countsHeight: 1.11e+006 cpsStart Time: 15.5 minEnd Time: 15.8 min13.5 14.0 14.5 15.0 15.5 16.0 16.5 17.0 17.5 18.0Time, min0.005.00e41.00e51.50e52.00e52.50e53.00e53.50e54.00e54.50e55.00e55.50e56.00e56.50e57.00e57.50e58.00e58.50e59.00e59.50e51.00e61.05e61.10e6

Intensity, cps15.62Sample Name: "b120418a077" Sample ID: "GLP10-01-01-30-037" File: "b120418a.wiff"Peak Name: "13C8PFOA-IS(IS)" Mass(es): "421.0/376.0 amu"Comment: "DAL-GW-607L-0-" Annotation: ""Sample Index: 77Sample Type: UnknownConcentration: 1.00 ng/mLCalculated Conc: N/AAcq. Date: 4/19/2012Acq. Time: 4:47:09 PMModified: YesProc. Algorithm: IntelliQuan - IQAMin. Peak Height: 0.00 cpsMin. Peak Width: 0.00 secSmoothing Width: 0 pointsRT Window: 30.0 secExpected RT: 15.6 minUse Relative RT: NoInt. Type: ValleyRetention Time: 15.6 minArea: 2927117 countsHeight: 1.02e+006 cpsStart Time: 15.5 minEnd Time: 15.8 min13.5 14.0 14.5 15.0 15.5 16.0 16.5 17.0 17.5 18.0Time, min0.005.00e41.00e51.50e52.00e52.50e53.00e53.50e54.00e54.50e55.00e55.50e56.00e56.50e57.00e57.50e58.00e58.50e59.00e59.50e51.00e6

Intensity, cps15.61Sample Name: "b120418a080" Sample ID: "GLP10-01-01-30-040" File: "b120418a.wiff"Peak Name: "13C8PFOA-IS(IS)" Mass(es): "421.0/376.0 amu"Comment: "DAL-GW-609R-0-" Annotation: ""Sample Index: 80Sample Type: UnknownConcentration: 1.00 ng/mLCalculated Conc: N/AAcq. Date: 4/19/2012Acq. Time: 5:51:44 PMModified: NoProc. Algorithm: IntelliQuan - IQAMin. Peak Height: 0.00 cpsMin. Peak Width: 0.00 secSmoothing Width: 0 pointsRT Window: 30.0 secExpected RT: 15.6 minUse Relative RT: NoInt. Type: ValleyRetention Time: 15.6 minArea: 3048023 countsHeight: 1.04e+006 cpsStart Time: 15.5 minEnd Time: 15.8 min13.5 14.0 14.5 15.0 15.5 16.0 16.5 17.0 17.5 18.0Time, min0.005.00e41.00e51.50e52.00e52.50e53.00e53.50e54.00e54.50e55.00e55.50e56.00e56.50e57.00e57.50e58.00e58.50e59.00e59.50e51.00e6

Intensity, cps15.62Sample Name: "b120418a086" Sample ID: "GLP10-01-01-30-043" File: "b120418a.wiff"Peak Name: "13C8PFOA-IS(IS)" Mass(es): "421.0/376.0 amu"Comment: "DAL-GW-609L-0-" Annotation: ""Sample Index: 86Sample Type: UnknownConcentration: 1.00 ng/mLCalculated Conc: N/AAcq. Date: 4/19/2012Acq. Time: 8:00:44 PMModified: YesProc. Algorithm: IntelliQuan - IQAMin. Peak Height: 0.00 cpsMin. Peak Width: 0.00 secSmoothing Width: 0 pointsRT Window: 30.0 secExpected RT: 15.6 minUse Relative RT: NoInt. Type: ValleyRetention Time: 15.6 minArea: 3007003 countsHeight: 1.05e+006 cpsStart Time: 15.5 minEnd Time: 15.8 min13.5 14.0 14.5 15.0 15.5 16.0 16.5 17.0 17.5 18.0Time, min0.005.00e41.00e51.50e52.00e52.50e53.00e53.50e54.00e54.50e55.00e55.50e56.00e56.50e57.00e57.50e58.00e58.50e59.00e59.50e51.00e6

Intensity, cps15.62*** Buster J2930203Batch Name: b120418a.dabData printed by STWPrinting Time: 11:14:12 AMPrinting Date: Thursday, May 03, 2012Page 14 of 28Sample Name: "b120418a088" Sample ID: "GLP10-01-01-30-045" File: "b120418a.wiff"Peak Name: "13C8PFOA-IS(IS)" Mass(es): "421.0/376.0 amu"Comment: "DAL-GW-609L-FMS-" Annotation: ""Sample Index: 88Sample Type: UnknownConcentration: 1.00 ng/mLCalculated Conc: N/AAcq. Date: 4/19/2012Acq. Time: 8:43:42 PMModified: YesProc. Algorithm: IntelliQuan - IQAMin. Peak Height: 0.00 cpsMin. Peak Width: 0.00 secSmoothing Width: 0 pointsRT Window: 30.0 secExpected RT: 15.6 minUse Relative RT: NoInt. Type: ValleyRetention Time: 15.6 minArea: 2993523 countsHeight: 1.01e+006 cpsStart Time: 15.5 minEnd Time: 15.8 min13.5 14.0 14.5 15.0 15.5 16.0 16.5 17.0 17.5 18.0Time, min0.005.00e41.00e51.50e52.00e52.50e53.00e53.50e54.00e54.50e55.00e55.50e56.00e56.50e57.00e57.50e58.00e58.50e59.00e59.50e51.00e6

Intensity, cps15.62Sample Name: "b120418a089" Sample ID: "GLP10-01-01-30-046" File: "b120418a.wiff"Peak Name: "13C8PFOA-IS(IS)" Mass(es): "421.0/376.0 amu"Comment: "DAL-GW-610R-0-" Annotation: ""Sample Index: 89Sample Type: UnknownConcentration: 1.00 ng/mLCalculated Conc: N/AAcq. Date: 4/19/2012Acq. Time: 9:05:15 PMModified: YesProc. Algorithm: IntelliQuan - IQAMin. Peak Height: 0.00 cpsMin. Peak Width: 0.00 secSmoothing Width: 0 pointsRT Window: 30.0 secExpected RT: 15.6 minUse Relative RT: NoInt. Type: ValleyRetention Time: 15.6 minArea: 3191012 countsHeight: 1.02e+006 cpsStart Time: 15.5 minEnd Time: 15.8 min13.5 14.0 14.5 15.0 15.5 16.0 16.5 17.0 17.5 18.0Time, min0.005.00e41.00e51.50e52.00e52.50e53.00e53.50e54.00e54.50e55.00e55.50e56.00e56.50e57.00e57.50e58.00e58.50e59.00e59.50e51.00e6

Intensity, cps15.62Sample Name: "b120418a092" Sample ID: "GLP10-01-01-30-049" File: "b120418a.wiff"Peak Name: "13C8PFOA-IS(IS)" Mass(es): "421.0/376.0 amu"Comment: "DAL-GW-610L-0-" Annotation: ""Sample Index: 92Sample Type: UnknownConcentration: 1.00 ng/mLCalculated Conc: N/AAcq. Date: 4/19/2012Acq. Time: 10:09:49 PMModified: YesProc. Algorithm: IntelliQuan - IQAMin. Peak Height: 0.00 cpsMin. Peak Width: 0.00 secSmoothing Width: 0 pointsRT Window: 30.0 secExpected RT: 15.6 minUse Relative RT: NoInt. Type: ValleyRetention Time: 15.6 minArea: 2850353 countsHeight: 9.61e+005 cpsStart Time: 15.5 minEnd Time: 15.9 min13.5 14.0 14.5 15.0 15.5 16.0 16.5 17.0 17.5 18.0Time, min0.05.0e41.0e51.5e52.0e52.5e53.0e53.5e54.0e54.5e55.0e55.5e56.0e56.5e57.0e57.5e58.0e58.5e59.0e59.5e5

Intensity, cps15.62Sample Name: "b120418a098" Sample ID: "GLP10-01-01-30-052" File: "b120418a.wiff"Peak Name: "13C8PFOA-IS(IS)" Mass(es): "421.0/376.0 amu"Comment: "DAL-GW-611R-0-" Annotation: ""Sample Index: 98Sample Type: UnknownConcentration: 1.00 ng/mLCalculated Conc: N/AAcq. Date: 4/20/2012Acq. Time: 12:19:09 AMModified: YesProc. Algorithm: IntelliQuan - IQAMin. Peak Height: 0.00 cpsMin. Peak Width: 0.00 secSmoothing Width: 0 pointsRT Window: 30.0 secExpected RT: 15.6 minUse Relative RT: NoInt. Type: ValleyRetention Time: 15.6 minArea: 3192979 countsHeight: 1.12e+006 cpsStart Time: 15.5 minEnd Time: 15.9 min13.5 14.0 14.5 15.0 15.5 16.0 16.5 17.0 17.5 18.0Time, min0.005.00e41.00e51.50e52.00e52.50e53.00e53.50e54.00e54.50e55.00e55.50e56.00e56.50e57.00e57.50e58.00e58.50e59.00e59.50e51.00e61.05e61.10e6

Intensity, cps15.62*** Buster J2930203Batch Name: b120418a.dabData printed by STWPrinting Time: 11:14:12 AMPrinting Date: Thursday, May 03, 2012Page 15 of 28Sample Name: "b120418a101" Sample ID: "GLP10-01-01-30-055" File: "b120418a.wiff"Peak Name: "13C8PFOA-IS(IS)" Mass(es): "421.0/376.0 amu"Comment: "DAL-GW-611L-0-" Annotation: ""Sample Index: 101Sample Type: UnknownConcentration: 1.00 ng/mLCalculated Conc: N/AAcq. Date: 4/20/2012Acq. Time: 1:23:52 AMModified: NoProc. Algorithm: IntelliQuan - IQAMin. Peak Height: 0.00 cpsMin. Peak Width: 0.00 secSmoothing Width: 0 pointsRT Window: 30.0 secExpected RT: 15.6 minUse Relative RT: NoInt. Type: ValleyRetention Time: 15.6 minArea: 3085859 countsHeight: 1.06e+006 cpsStart Time: 15.5 minEnd Time: 15.8 min13.5 14.0 14.5 15.0 15.5 16.0 16.5 17.0 17.5 18.0Time, min0.005.00e41.00e51.50e52.00e52.50e53.00e53.50e54.00e54.50e55.00e55.50e56.00e56.50e57.00e57.50e58.00e58.50e59.00e59.50e51.00e61.05e6

Intensity, cps15.62Sample Name: "b120418a103" Sample ID: "GLP10-01-01-30-057" File: "b120418a.wiff"Peak Name: "13C8PFOA-IS(IS)" Mass(es): "421.0/376.0 amu"Comment: "DAL-GW-611L-FMS-" Annotation: ""Sample Index: 103Sample Type: UnknownConcentration: 1.00 ng/mLCalculated Conc: N/AAcq. Date: 4/20/2012Acq. Time: 2:06:59 AMModified: YesProc. Algorithm: IntelliQuan - IQAMin. Peak Height: 0.00 cpsMin. Peak Width: 0.00 secSmoothing Width: 0 pointsRT Window: 30.0 secExpected RT: 15.6 minUse Relative RT: NoInt. Type: ValleyRetention Time: 15.6 minArea: 2771432 countsHeight: 9.77e+005 cpsStart Time: 15.5 minEnd Time: 15.9 min13.5 14.0 14.5 15.0 15.5 16.0 16.5 17.0 17.5 18.0Time, min0.05.0e41.0e51.5e52.0e52.5e53.0e53.5e54.0e54.5e55.0e55.5e56.0e56.5e57.0e57.5e58.0e58.5e59.0e59.5e5

Intensity, cps15.62Sample Name: "b120418a104" Sample ID: "GLP10-01-01-30-058" File: "b120418a.wiff"Peak Name: "13C8PFOA-IS(IS)" Mass(es): "421.0/376.0 amu"Comment: "DAL-GW-MW121-0-" Annotation: ""Sample Index: 104Sample Type: UnknownConcentration: 1.00 ng/mLCalculated Conc: N/AAcq. Date: 4/20/2012Acq. Time: 2:28:33 AMModified: YesProc. Algorithm: IntelliQuan - IQAMin. Peak Height: 0.00 cpsMin. Peak Width: 0.00 secSmoothing Width: 0 pointsRT Window: 30.0 secExpected RT: 15.6 minUse Relative RT: NoInt. Type: ValleyRetention Time: 15.6 minArea: 3222621 countsHeight: 1.10e+006 cpsStart Time: 15.5 minEnd Time: 15.9 min13.5 14.0 14.5 15.0 15.5 16.0 16.5 17.0 17.5 18.0Time, min0.005.00e41.00e51.50e52.00e52.50e53.00e53.50e54.00e54.50e55.00e55.50e56.00e56.50e57.00e57.50e58.00e58.50e59.00e59.50e51.00e61.05e61.10e6

Intensity, cps15.62Sample Name: "b120418a106" Sample ID: "GLP10-01-01-30-060" File: "b120418a.wiff"Peak Name: "13C8PFOA-IS(IS)" Mass(es): "421.0/376.0 amu"Comment: "DAL-GW-MW121-FMS-" Annotation: ""Sample Index: 106Sample Type: UnknownConcentration: 1.00 ng/mLCalculated Conc: N/AAcq. Date: 4/20/2012Acq. Time: 3:11:40 AMModified: NoProc. Algorithm: IntelliQuan - IQAMin. Peak Height: 0.00 cpsMin. Peak Width: 0.00 secSmoothing Width: 0 pointsRT Window: 30.0 secExpected RT: 15.6 minUse Relative RT: NoInt. Type: ValleyRetention Time: 15.6 minArea: 3358080 countsHeight: 1.17e+006 cpsStart Time: 15.5 minEnd Time: 15.9 min13.5 14.0 14.5 15.0 15.5 16.0 16.5 17.0 17.5 18.0Time, min0.005.00e41.00e51.50e52.00e52.50e53.00e53.50e54.00e54.50e55.00e55.50e56.00e56.50e57.00e57.50e58.00e58.50e59.00e59.50e51.00e61.05e61.10e61.15e6

Intensity, cps15.62*** Buster J2930203Batch Name: b120418a.dabData printed by STWPrinting Time: 11:14:12 AMPrinting Date: Thursday, May 03, 2012Page 16 of 28Sample Name: "b120418a110" Sample ID: "GLP10-01-01-30-061" File: "b120418a.wiff"Peak Name: "13C8PFOA-IS(IS)" Mass(es): "421.0/376.0 amu"Comment: "DAL-GW-MW47-0-" Annotation: ""Sample Index: 110Sample Type: UnknownConcentration: 0.862 ng/mLCalculated Conc: N/AAcq. Date: 4/20/2012Acq. Time: 4:37:44 AMModified: NoProc. Algorithm: IntelliQuan - IQAMin. Peak Height: 0.00 cpsMin. Peak Width: 0.00 secSmoothing Width: 0 pointsRT Window: 30.0 secExpected RT: 15.6 minUse Relative RT: NoInt. Type: ValleyRetention Time: 15.6 minArea: 2996973 countsHeight: 1.19e+006 cpsStart Time: 15.5 minEnd Time: 15.8 min13.5 14.0 14.5 15.0 15.5 16.0 16.5 17.0 17.5 18.0Time, min0.005.00e41.00e51.50e52.00e52.50e53.00e53.50e54.00e54.50e55.00e55.50e56.00e56.50e57.00e57.50e58.00e58.50e59.00e59.50e51.00e61.05e61.10e61.15e6

Intensity, cps15.62Sample Name: "b120418a112" Sample ID: "GLP10-01-01-30-063" File: "b120418a.wiff"Peak Name: "13C8PFOA-IS(IS)" Mass(es): "421.0/376.0 amu"Comment: "DAL-GW-MW47-FMS-" Annotation: ""Sample Index: 112Sample Type: UnknownConcentration: 1.00 ng/mLCalculated Conc: N/AAcq. Date: 4/20/2012Acq. Time: 5:20:49 AMModified: NoProc. Algorithm: IntelliQuan - IQAMin. Peak Height: 0.00 cpsMin. Peak Width: 0.00 secSmoothing Width: 0 pointsRT Window: 30.0 secExpected RT: 15.6 minUse Relative RT: NoInt. Type: ValleyRetention Time: 15.6 minArea: 3438938 countsHeight: 1.16e+006 cpsStart Time: 15.5 minEnd Time: 15.9 min13.5 14.0 14.5 15.0 15.5 16.0 16.5 17.0 17.5 18.0Time, min0.005.00e41.00e51.50e52.00e52.50e53.00e53.50e54.00e54.50e55.00e55.50e56.00e56.50e57.00e57.50e58.00e58.50e59.00e59.50e51.00e61.05e61.10e61.15e6

Intensity, cps15.62Sample Name: "b120418a113" Sample ID: "GLP10-01-01-30-064" File: "b120418a.wiff"Peak Name: "13C8PFOA-IS(IS)" Mass(es): "421.0/376.0 amu"Comment: "DAL-GW-MW13S-0-" Annotation: ""Sample Index: 113Sample Type: UnknownConcentration: 1.00 ng/mLCalculated Conc: N/AAcq. Date: 4/20/2012Acq. Time: 5:42:19 AMModified: NoProc. Algorithm: IntelliQuan - IQAMin. Peak Height: 0.00 cpsMin. Peak Width: 0.00 secSmoothing Width: 0 pointsRT Window: 30.0 secExpected RT: 15.6 minUse Relative RT: NoInt. Type: ValleyRetention Time: 15.6 minArea: 3441876 countsHeight: 1.16e+006 cpsStart Time: 15.5 minEnd Time: 15.8 min13.5 14.0 14.5 15.0 15.5 16.0 16.5 17.0 17.5 18.0Time, min0.005.00e41.00e51.50e52.00e52.50e53.00e53.50e54.00e54.50e55.00e55.50e56.00e56.50e57.00e57.50e58.00e58.50e59.00e59.50e51.00e61.05e61.10e61.15e6

Intensity, cps15.62Sample Name: "b120418a116" Sample ID: "GLP10-01-01-30-067" File: "b120418a.wiff"Peak Name: "13C8PFOA-IS(IS)" Mass(es): "421.0/376.0 amu"Comment: "DAL-GW-MW13I-0-" Annotation: ""Sample Index: 116Sample Type: UnknownConcentration: 1.00 ng/mLCalculated Conc: N/AAcq. Date: 4/20/2012Acq. Time: 6:46:56 AMModified: NoProc. Algorithm: IntelliQuan - IQAMin. Peak Height: 0.00 cpsMin. Peak Width: 0.00 secSmoothing Width: 0 pointsRT Window: 30.0 secExpected RT: 15.6 minUse Relative RT: NoInt. Type: ValleyRetention Time: 15.6 minArea: 3544375 countsHeight: 1.22e+006 cpsStart Time: 15.5 minEnd Time: 15.8 min13.5 14.0 14.5 15.0 15.5 16.0 16.5 17.0 17.5 18.0Time, min0.005.00e41.00e51.50e52.00e52.50e53.00e53.50e54.00e54.50e55.00e55.50e56.00e56.50e57.00e57.50e58.00e58.50e59.00e59.50e51.00e61.05e61.10e61.15e61.20e6

Intensity, cps15.61*** Buster J2930203Batch Name: b120418a.dabData printed by STWPrinting Time: 11:14:12 AMPrinting Date: Thursday, May 03, 2012Page 17 of 28Sample Name: "b120418a122" Sample ID: "GLP10-01-01-30-070" File: "b120418a.wiff"Peak Name: "13C8PFOA-IS(IS)" Mass(es): "421.0/376.0 amu"Comment: "DAL-GW-MW13B-0-" Annotation: ""Sample Index: 122Sample Type: UnknownConcentration: 1.00 ng/mLCalculated Conc: N/AAcq. Date: 4/20/2012Acq. Time: 8:56:05 AMModified: YesProc. Algorithm: IntelliQuan - IQAMin. Peak Height: 0.00 cpsMin. Peak Width: 0.00 secSmoothing Width: 0 pointsRT Window: 30.0 secExpected RT: 15.6 minUse Relative RT: NoInt. Type: ValleyRetention Time: 15.6 minArea: 3403196 countsHeight: 1.16e+006 cpsStart Time: 15.5 minEnd Time: 15.8 min13.5 14.0 14.5 15.0 15.5 16.0 16.5 17.0 17.5 18.0Time, min0.005.00e41.00e51.50e52.00e52.50e53.00e53.50e54.00e54.50e55.00e55.50e56.00e56.50e57.00e57.50e58.00e58.50e59.00e59.50e51.00e61.05e61.10e61.15e6

Intensity, cps15.61Sample Name: "b120418a124" Sample ID: "GLP10-01-01-30-072" File: "b120418a.wiff"Peak Name: "13C8PFOA-IS(IS)" Mass(es): "421.0/376.0 amu"Comment: "DAL-GW-MW13B-FMS-" Annotation: ""Sample Index: 124Sample Type: UnknownConcentration: 1.00 ng/mLCalculated Conc: N/AAcq. Date: 4/20/2012Acq. Time: 9:39:06 AMModified: NoProc. Algorithm: IntelliQuan - IQAMin. Peak Height: 0.00 cpsMin. Peak Width: 0.00 secSmoothing Width: 0 pointsRT Window: 30.0 secExpected RT: 15.6 minUse Relative RT: NoInt. Type: ValleyRetention Time: 15.6 minArea: 3354129 countsHeight: 1.18e+006 cpsStart Time: 15.5 minEnd Time: 15.8 min13.5 14.0 14.5 15.0 15.5 16.0 16.5 17.0 17.5 18.0Time, min0.005.00e41.00e51.50e52.00e52.50e53.00e53.50e54.00e54.50e55.00e55.50e56.00e56.50e57.00e57.50e58.00e58.50e59.00e59.50e51.00e61.05e61.10e61.15e6

Intensity, cps15.60Sample Name: "b120418a125" Sample ID: "GLP10-01-01-30-073" File: "b120418a.wiff"Peak Name: "13C8PFOA-IS(IS)" Mass(es): "421.0/376.0 amu"Comment: "DAL-GW-604L-RB-" Annotation: ""Sample Index: 125Sample Type: UnknownConcentration: 1.00 ng/mLCalculated Conc: N/AAcq. Date: 4/20/2012Acq. Time: 10:00:31 AMModified: NoProc. Algorithm: IntelliQuan - IQAMin. Peak Height: 0.00 cpsMin. Peak Width: 0.00 secSmoothing Width: 0 pointsRT Window: 30.0 secExpected RT: 15.6 minUse Relative RT: NoInt. Type: ValleyRetention Time: 15.6 minArea: 3359066 countsHeight: 1.14e+006 cpsStart Time: 15.5 minEnd Time: 15.9 min13.5 14.0 14.5 15.0 15.5 16.0 16.5 17.0 17.5 18.0Time, min0.005.00e41.00e51.50e52.00e52.50e53.00e53.50e54.00e54.50e55.00e55.50e56.00e56.50e57.00e57.50e58.00e58.50e59.00e59.50e51.00e61.05e61.10e6

Intensity, cps15.60Sample Name: "b120418a126" Sample ID: "GLP10-01-01-30-074" File: "b120418a.wiff"Peak Name: "13C8PFOA-IS(IS)" Mass(es): "421.0/376.0 amu"Comment: "DAL-GW-607R-RB-" Annotation: ""Sample Index: 126Sample Type: UnknownConcentration: 1.00 ng/mLCalculated Conc: N/AAcq. Date: 4/20/2012Acq. Time: 10:22:03 AMModified: NoProc. Algorithm: IntelliQuan - IQAMin. Peak Height: 0.00 cpsMin. Peak Width: 0.00 secSmoothing Width: 0 pointsRT Window: 30.0 secExpected RT: 15.6 minUse Relative RT: NoInt. Type: ValleyRetention Time: 15.6 minArea: 3216200 countsHeight: 1.12e+006 cpsStart Time: 15.5 minEnd Time: 15.9 min13.5 14.0 14.5 15.0 15.5 16.0 16.5 17.0 17.5 18.0Time, min0.005.00e41.00e51.50e52.00e52.50e53.00e53.50e54.00e54.50e55.00e55.50e56.00e56.50e57.00e57.50e58.00e58.50e59.00e59.50e51.00e61.05e61.10e6

Intensity, cps15.61*** Buster J2930203Batch Name: b120418a.dabData printed by STWPrinting Time: 11:14:12 AMPrinting Date: Thursday, May 03, 2012Page 18 of 28Sample Name: "b120418a127" Sample ID: "GLP10-01-01-30-075" File: "b120418a.wiff"Peak Name: "13C8PFOA-IS(IS)" Mass(es): "421.0/376.0 amu"Comment: "DAL-GW-TRIP01-0-" Annotation: ""Sample Index: 127Sample Type: UnknownConcentration: 1.00 ng/mLCalculated Conc: N/AAcq. Date: 4/20/2012Acq. Time: 10:43:37 AMModified: YesProc. Algorithm: IntelliQuan - IQAMin. Peak Height: 0.00 cpsMin. Peak Width: 0.00 secSmoothing Width: 0 pointsRT Window: 30.0 secExpected RT: 15.6 minUse Relative RT: NoInt. Type: ValleyRetention Time: 15.6 minArea: 3939192 countsHeight: 1.38e+006 cpsStart Time: 15.5 minEnd Time: 15.8 min13.5 14.0 14.5 15.0 15.5 16.0 16.5 17.0 17.5 18.0Time, min0.05.0e41.0e51.5e52.0e52.5e53.0e53.5e54.0e54.5e55.0e55.5e56.0e56.5e57.0e57.5e58.0e58.5e59.0e59.5e51.0e61.1e61.1e61.2e61.2e61.3e61.3e61.4e6

Intensity, cps15.61Sample Name: "b120418a128" Sample ID: "GLP10-01-01-30-076" File: "b120418a.wiff"Peak Name: "13C8PFOA-IS(IS)" Mass(es): "421.0/376.0 amu"Comment: "DAL-GW-TRIP01-FMS-" Annotation: ""Sample Index: 128Sample Type: UnknownConcentration: 1.00 ng/mLCalculated Conc: N/AAcq. Date: 4/20/2012Acq. Time: 11:05:06 AMModified: NoProc. Algorithm: IntelliQuan - IQAMin. Peak Height: 0.00 cpsMin. Peak Width: 0.00 secSmoothing Width: 0 pointsRT Window: 30.0 secExpected RT: 15.6 minUse Relative RT: NoInt. Type: ValleyRetention Time: 15.6 minArea: 3361849 countsHeight: 1.16e+006 cpsStart Time: 15.5 minEnd Time: 15.8 min13.5 14.0 14.5 15.0 15.5 16.0 16.5 17.0 17.5 18.0Time, min0.005.00e41.00e51.50e52.00e52.50e53.00e53.50e54.00e54.50e55.00e55.50e56.00e56.50e57.00e57.50e58.00e58.50e59.00e59.50e51.00e61.05e61.10e61.15e6

Intensity, cps15.60Sample Name: "b120418a017" Sample ID: "11012-62-8" File: "b120418a.wiff"Peak Name: "PFOA" Mass(es): "413.0/369.0 amu,413.0/219.0 amu,413.0/169.0 amu"Comment: "1.0 ng/mL FC std in Synth. Water" Annotation: ""Sample Index: 17Sample Type: StandardConcentration: 0.958 ng/mLCalculated Conc: 0.976 ng/mLAcq. Date: 4/18/2012Acq. Time: 7:17:13 PMModified: YesRT Window: 30.0 secExpected RT: 15.6 minUse Relative RT: YesInt. Type: ManualRetention Time: 15.6 minArea: 4503633 countsHeight: 1.20e+006 cpsStart Time: 15.3 minEnd Time: 15.8 min13.5 14.0 14.5 15.0 15.5 16.0 16.5 17.0 17.5 18.0Time, min0.005.00e41.00e51.50e52.00e52.50e53.00e53.50e54.00e54.50e55.00e55.50e56.00e56.50e57.00e57.50e58.00e58.50e59.00e59.50e51.00e61.05e61.10e61.15e61.20e6

Intensity, cps15.6415.5016.06Sample Name: "b120418a023" Sample ID: "12001-1" File: "b120418a.wiff"Peak Name: "PFOA" Mass(es): "413.0/369.0 amu,413.0/219.0 amu,413.0/169.0 amu"Comment: "Method Blank" Annotation: ""Sample Index: 23Sample Type: UnknownConcentration: N/ACalculated Conc: < 0Acq. Date: 4/18/2012Acq. Time: 9:26:07 PMModified: NoProc. Algorithm: IntelliQuan - MQIINoise Percentage: 50Base. Sub. Window: 1.00 minPeak-Split. Factor: 8Report Largest Peak: YesMin. Peak Height: 0.00 cpsMin. Peak Width: 0.00 secSmoothing Width: 0 pointsRT Window: 30.0 secExpected RT: 15.6 minUse Relative RT: YesInt. Type: Base To BaseRetention Time: 15.7 minArea: 13796 countsHeight: 5.87e+003 cpsStart Time: 15.6 minEnd Time: 15.7 min13.5 14.0 14.5 15.0 15.5 16.0 16.5 17.0 17.5 18.0Time, min0.05000.01.0e41.5e42.0e42.5e43.0e43.5e44.0e44.5e45.0e45.5e46.0e46.5e47.0e47.5e48.0e48.5e49.0e4

Intensity, cps16.05*** Buster J2930203Batch Name: b120418a.dabData printed by STWPrinting Time: 11:14:12 AMPrinting Date: Thursday, May 03, 2012Page 19 of 28Sample Name: "b120418a026" Sample ID: "LCS-120416-1" File: "b120418a.wiff"Peak Name: "PFOA" Mass(es): "413.0/369.0 amu,413.0/219.0 amu,413.0/169.0 amu"Comment: "0.2ppb LCS" Annotation: ""Sample Index: 26Sample Type: QCConcentration: 0.190 ng/mLCalculated Conc: 0.186 ng/mLAcq. Date: 4/18/2012Acq. Time: 10:30:41 PMModified: YesRT Window: 30.0 secExpected RT: 15.6 minUse Relative RT: YesInt. Type: ManualRetention Time: 15.6 minArea: 931702 countsHeight: 2.57e+005 cpsStart Time: 15.4 minEnd Time: 15.7 min13.5 14.0 14.5 15.0 15.5 16.0 16.5 17.0 17.5 18.0Time, min0.01.0e42.0e43.0e44.0e45.0e46.0e47.0e48.0e49.0e41.0e51.1e51.2e51.3e51.4e51.5e51.6e51.7e51.8e51.9e52.0e52.1e52.2e52.3e52.4e52.5e5

Intensity, cps15.6516.0614.4315.5016.1816.53Sample Name: "b120418a029" Sample ID: "LCS-120416-4" File: "b120418a.wiff"Peak Name: "PFOA" Mass(es): "413.0/369.0 amu,413.0/219.0 amu,413.0/169.0 amu"Comment: "2ppb LCS" Annotation: ""Sample Index: 29Sample Type: QCConcentration: 1.90 ng/mLCalculated Conc: 1.94 ng/mLAcq. Date: 4/18/2012Acq. Time: 11:35:06 PMModified: YesRT Window: 30.0 secExpected RT: 15.6 minUse Relative RT: YesInt. Type: ManualRetention Time: 15.6 minArea: 9133755 countsHeight: 2.41e+006 cpsStart Time: 15.3 minEnd Time: 15.8 min13.5 14.0 14.5 15.0 15.5 16.0 16.5 17.0 17.5 18.0Time, min0.01.0e52.0e53.0e54.0e55.0e56.0e57.0e58.0e59.0e51.0e61.1e61.2e61.3e61.4e61.5e61.6e61.7e61.8e61.9e62.0e62.1e62.2e62.3e6

Intensity, cps15.6415.4916.0614.43Sample Name: "b120418a032" Sample ID: "LCS-120416-7" File: "b120418a.wiff"Peak Name: "PFOA" Mass(es): "413.0/369.0 amu,413.0/219.0 amu,413.0/169.0 amu"Comment: "10ppb LCS" Annotation: ""Sample Index: 32Sample Type: QCConcentration: 9.52 ng/mLCalculated Conc: 8.85 ng/mLAcq. Date: 4/19/2012Acq. Time: 12:39:30 AMModified: YesRT Window: 30.0 secExpected RT: 15.6 minUse Relative RT: YesInt. Type: ManualRetention Time: 15.6 minArea: 35034717 countsHeight: 7.66e+006 cpsStart Time: 15.3 minEnd Time: 15.8 min13.5 14.0 14.5 15.0 15.5 16.0 16.5 17.0 17.5 18.0Time, min0.05.0e51.0e61.5e62.0e62.5e63.0e63.5e64.0e64.5e65.0e65.5e66.0e66.5e67.0e67.5e6

Intensity, cps15.6415.49Sample Name: "b120418a041" Sample ID: "GLP10-01-01-30-007" File: "b120418a.wiff"Peak Name: "PFOA" Mass(es): "413.0/369.0 amu,413.0/219.0 amu,413.0/169.0 amu"Comment: "DAL-GW-602L-0-" Annotation: ""Sample Index: 41Sample Type: UnknownConcentration: N/ACalculated Conc: 1.42 ng/mLAcq. Date: 4/19/2012Acq. Time: 3:53:11 AMModified: YesRT Window: 30.0 secExpected RT: 15.6 minUse Relative RT: YesInt. Type: ManualRetention Time: 15.6 minArea: 6717308 countsHeight: 1.84e+006 cpsStart Time: 15.3 minEnd Time: 15.8 min13.5 14.0 14.5 15.0 15.5 16.0 16.5 17.0 17.5 18.0Time, min0.01.0e52.0e53.0e54.0e55.0e56.0e57.0e58.0e59.0e51.0e61.1e61.2e61.3e61.4e61.5e61.6e61.7e61.8e6

Intensity, cps15.64*** Buster J2930203Batch Name: b120418a.dabData printed by STWPrinting Time: 11:14:12 AMPrinting Date: Thursday, May 03, 2012Page 20 of 28Sample Name: "b120418a044" Sample ID: "GLP10-01-01-30-013" File: "b120418a.wiff"Peak Name: "PFOA" Mass(es): "413.0/369.0 amu,413.0/219.0 amu,413.0/169.0 amu"Comment: "DAL-GW-603S-0-" Annotation: ""Sample Index: 44Sample Type: UnknownConcentration: N/ACalculated Conc: 0.423 ng/mLAcq. Date: 4/19/2012Acq. Time: 4:57:35 AMModified: YesRT Window: 30.0 secExpected RT: 15.6 minUse Relative RT: YesInt. Type: ManualRetention Time: 15.6 minArea: 1816989 countsHeight: 4.93e+005 cpsStart Time: 15.3 minEnd Time: 15.7 min13.5 14.0 14.5 15.0 15.5 16.0 16.5 17.0 17.5 18.0Time, min0.02.0e44.0e46.0e48.0e41.0e51.2e51.4e51.6e51.8e52.0e52.2e52.4e52.6e52.8e53.0e53.2e53.4e53.6e53.8e54.0e54.2e54.4e54.6e54.8e5

Intensity, cps15.6415.49Sample Name: "b120418a050" Sample ID: "GLP10-01-01-30-016" File: "b120418a.wiff"Peak Name: "PFOA" Mass(es): "413.0/369.0 amu,413.0/219.0 amu,413.0/169.0 amu"Comment: "DAL-GW-603L-0-" Annotation: ""Sample Index: 50Sample Type: UnknownConcentration: N/ACalculated Conc: 0.363 ng/mLAcq. Date: 4/19/2012Acq. Time: 7:06:35 AMModified: NoProc. Algorithm: IntelliQuan - MQIINoise Percentage: 50Base. Sub. Window: 1.00 minPeak-Split. Factor: 8Report Largest Peak: YesMin. Peak Height: 0.00 cpsMin. Peak Width: 0.00 secSmoothing Width: 0 pointsRT Window: 30.0 secExpected RT: 15.6 minUse Relative RT: YesInt. Type: Base To BaseRetention Time: 15.6 minArea: 1837590 countsHeight: 4.70e+005 cpsStart Time: 15.4 minEnd Time: 15.7 min13.5 14.0 14.5 15.0 15.5 16.0 16.5 17.0 17.5 18.0Time, min0.02.0e44.0e46.0e48.0e41.0e51.2e51.4e51.6e51.8e52.0e52.2e52.4e52.6e52.8e53.0e53.2e53.4e53.6e53.8e54.0e54.2e54.4e54.6e5

Intensity, cps15.6315.4816.0414.42Sample Name: "b120418a053" Sample ID: "GLP10-01-01-30-019" File: "b120418a.wiff"Peak Name: "PFOA" Mass(es): "413.0/369.0 amu,413.0/219.0 amu,413.0/169.0 amu"Comment: "DAL-GW-604R-0-" Annotation: ""Sample Index: 53Sample Type: UnknownConcentration: N/ACalculated Conc: 1.11 ng/mLAcq. Date: 4/19/2012Acq. Time: 8:11:06 AMModified: YesRT Window: 30.0 secExpected RT: 15.6 minUse Relative RT: YesInt. Type: ManualRetention Time: 15.6 minArea: 4876383 countsHeight: 1.36e+006 cpsStart Time: 15.3 minEnd Time: 15.7 min13.5 14.0 14.5 15.0 15.5 16.0 16.5 17.0 17.5 18.0Time, min0.05.0e41.0e51.5e52.0e52.5e53.0e53.5e54.0e54.5e55.0e55.5e56.0e56.5e57.0e57.5e58.0e58.5e59.0e59.5e51.0e61.1e61.1e61.2e61.2e61.3e61.3e61.4e6

Intensity, cps15.6215.4816.0314.40Sample Name: "b120418a055" Sample ID: "GLP10-01-01-30-021" File: "b120418a.wiff"Peak Name: "PFOA" Mass(es): "413.0/369.0 amu,413.0/219.0 amu,413.0/169.0 amu"Comment: "DAL-GW-604R-FMS-" Annotation: ""Sample Index: 55Sample Type: UnknownConcentration: N/ACalculated Conc: 2.10 ng/mLAcq. Date: 4/19/2012Acq. Time: 8:54:05 AMModified: YesRT Window: 30.0 secExpected RT: 15.6 minUse Relative RT: YesInt. Type: ManualRetention Time: 15.6 minArea: 9455597 countsHeight: 2.80e+006 cpsStart Time: 15.3 minEnd Time: 15.8 min13.5 14.0 14.5 15.0 15.5 16.0 16.5 17.0 17.5 18.0Time, min0.01.0e52.0e53.0e54.0e55.0e56.0e57.0e58.0e59.0e51.0e61.1e61.2e61.3e61.4e61.5e61.6e61.7e61.8e61.9e62.0e62.1e62.2e62.3e62.4e62.5e62.6e62.7e6

Intensity, cps15.6215.4816.03*** Buster J2930203Batch Name: b120418a.dabData printed by STWPrinting Time: 11:14:12 AMPrinting Date: Thursday, May 03, 2012Page 21 of 28Sample Name: "b120418a056" Sample ID: "GLP10-01-01-30-022" File: "b120418a.wiff"Peak Name: "PFOA" Mass(es): "413.0/369.0 amu,413.0/219.0 amu,413.0/169.0 amu"Comment: "DAL-GW-604S-0-" Annotation: ""Sample Index: 56Sample Type: UnknownConcentration: N/ACalculated Conc: 1.39 ng/mLAcq. Date: 4/19/2012Acq. Time: 9:15:39 AMModified: YesRT Window: 30.0 secExpected RT: 15.6 minUse Relative RT: YesInt. Type: ManualRetention Time: 15.6 minArea: 6373576 countsHeight: 1.78e+006 cpsStart Time: 15.3 minEnd Time: 15.8 min13.5 14.0 14.5 15.0 15.5 16.0 16.5 17.0 17.5 18.0Time, min0.01.0e52.0e53.0e54.0e55.0e56.0e57.0e58.0e59.0e51.0e61.1e61.2e61.3e61.4e61.5e61.6e61.7e6

Intensity, cps15.6115.48Sample Name: "b120418a062" Sample ID: "GLP10-01-01-30-025" File: "b120418a.wiff"Peak Name: "PFOA" Mass(es): "413.0/369.0 amu,413.0/219.0 amu,413.0/169.0 amu"Comment: "DAL-GW-604L-0-" Annotation: ""Sample Index: 62Sample Type: UnknownConcentration: N/ACalculated Conc: 1.55 ng/mLAcq. Date: 4/19/2012Acq. Time: 11:24:37 AMModified: NoProc. Algorithm: IntelliQuan - MQIINoise Percentage: 50Base. Sub. Window: 1.00 minPeak-Split. Factor: 8Report Largest Peak: YesMin. Peak Height: 0.00 cpsMin. Peak Width: 0.00 secSmoothing Width: 0 pointsRT Window: 30.0 secExpected RT: 15.6 minUse Relative RT: YesInt. Type: Base To BaseRetention Time: 15.6 minArea: 6070515 countsHeight: 1.66e+006 cpsStart Time: 15.3 minEnd Time: 15.7 min13.5 14.0 14.5 15.0 15.5 16.0 16.5 17.0 17.5 18.0Time, min0.01.0e52.0e53.0e54.0e55.0e56.0e57.0e58.0e59.0e51.0e61.1e61.2e61.3e61.4e61.5e61.6e6

Intensity, cps15.6215.4816.03Sample Name: "b120418a065" Sample ID: "GLP10-01-01-30-028" File: "b120418a.wiff"Peak Name: "PFOA" Mass(es): "413.0/369.0 amu,413.0/219.0 amu,413.0/169.0 amu"Comment: "DAL-GW-605R-0-" Annotation: ""Sample Index: 65Sample Type: UnknownConcentration: N/ACalculated Conc: 0.305 ng/mLAcq. Date: 4/19/2012Acq. Time: 12:29:13 PMModified: NoProc. Algorithm: IntelliQuan - MQIINoise Percentage: 50Base. Sub. Window: 1.00 minPeak-Split. Factor: 8Report Largest Peak: YesMin. Peak Height: 0.00 cpsMin. Peak Width: 0.00 secSmoothing Width: 0 pointsRT Window: 30.0 secExpected RT: 15.6 minUse Relative RT: YesInt. Type: Base To BaseRetention Time: 15.6 minArea: 1371768 countsHeight: 3.75e+005 cpsStart Time: 15.4 minEnd Time: 15.7 min13.5 14.0 14.5 15.0 15.5 16.0 16.5 17.0 17.5 18.0Time, min0.02.0e44.0e46.0e48.0e41.0e51.2e51.4e51.6e51.8e52.0e52.2e52.4e52.6e52.8e53.0e53.2e53.4e53.6e5

Intensity, cps15.6216.0315.48Sample Name: "b120418a068" Sample ID: "GLP10-01-01-30-031" File: "b120418a.wiff"Peak Name: "PFOA" Mass(es): "413.0/369.0 amu,413.0/219.0 amu,413.0/169.0 amu"Comment: "DAL-GW-605L-0-" Annotation: ""Sample Index: 68Sample Type: UnknownConcentration: N/ACalculated Conc: 0.239 ng/mLAcq. Date: 4/19/2012Acq. Time: 1:33:36 PMModified: YesRT Window: 30.0 secExpected RT: 15.6 minUse Relative RT: YesInt. Type: ManualRetention Time: 15.6 minArea: 1044875 countsHeight: 2.82e+005 cpsStart Time: 15.4 minEnd Time: 15.7 min13.5 14.0 14.5 15.0 15.5 16.0 16.5 17.0 17.5 18.0Time, min0.02.0e44.0e46.0e48.0e41.0e51.2e51.4e51.6e51.8e52.0e52.2e52.4e52.6e52.8e5

Intensity, cps15.6216.0315.4714.40*** Buster J2930203Batch Name: b120418a.dabData printed by STWPrinting Time: 11:14:12 AMPrinting Date: Thursday, May 03, 2012Page 22 of 28Sample Name: "b120418a070" Sample ID: "GLP10-01-01-30-033" File: "b120418a.wiff"Peak Name: "PFOA" Mass(es): "413.0/369.0 amu,413.0/219.0 amu,413.0/169.0 amu"Comment: "DAL-GW-605L-FMS-" Annotation: ""Sample Index: 70Sample Type: UnknownConcentration: N/ACalculated Conc: 1.21 ng/mLAcq. Date: 4/19/2012Acq. Time: 2:16:34 PMModified: YesRT Window: 30.0 secExpected RT: 15.6 minUse Relative RT: YesInt. Type: ManualRetention Time: 15.6 minArea: 5358730 countsHeight: 1.87e+006 cpsStart Time: 15.4 minEnd Time: 15.7 min13.5 14.0 14.5 15.0 15.5 16.0 16.5 17.0 17.5 18.0Time, min0.01.0e52.0e53.0e54.0e55.0e56.0e57.0e58.0e59.0e51.0e61.1e61.2e61.3e61.4e61.5e61.6e61.7e61.8e6

Intensity, cps15.6216.0315.4814.40Sample Name: "b120418a074" Sample ID: "GLP10-01-01-30-034" File: "b120418a.wiff"Peak Name: "PFOA" Mass(es): "413.0/369.0 amu,413.0/219.0 amu,413.0/169.0 amu"Comment: "DAL-GW-607R-0-" Annotation: ""Sample Index: 74Sample Type: UnknownConcentration: N/ACalculated Conc: 0.396 ng/mLAcq. Date: 4/19/2012Acq. Time: 3:42:35 PMModified: YesRT Window: 30.0 secExpected RT: 15.6 minUse Relative RT: YesInt. Type: ManualRetention Time: 15.6 minArea: 1885447 countsHeight: 4.63e+005 cpsStart Time: 15.3 minEnd Time: 15.7 min13.5 14.0 14.5 15.0 15.5 16.0 16.5 17.0 17.5 18.0Time, min0.02.0e44.0e46.0e48.0e41.0e51.2e51.4e51.6e51.8e52.0e52.2e52.4e52.6e52.8e53.0e53.2e53.4e53.6e53.8e54.0e54.2e54.4e54.6e5

Intensity, cps15.6215.4816.03Sample Name: "b120418a077" Sample ID: "GLP10-01-01-30-037" File: "b120418a.wiff"Peak Name: "PFOA" Mass(es): "413.0/369.0 amu,413.0/219.0 amu,413.0/169.0 amu"Comment: "DAL-GW-607L-0-" Annotation: ""Sample Index: 77Sample Type: UnknownConcentration: N/ACalculated Conc: 0.557 ng/mLAcq. Date: 4/19/2012Acq. Time: 4:47:09 PMModified: YesRT Window: 30.0 secExpected RT: 15.6 minUse Relative RT: YesInt. Type: ManualRetention Time: 15.6 minArea: 2445907 countsHeight: 6.04e+005 cpsStart Time: 15.3 minEnd Time: 15.7 min13.5 14.0 14.5 15.0 15.5 16.0 16.5 17.0 17.5 18.0Time, min0.05.0e41.0e51.5e52.0e52.5e53.0e53.5e54.0e54.5e55.0e55.5e56.0e5

Intensity, cps15.6215.4816.0414.40Sample Name: "b120418a080" Sample ID: "GLP10-01-01-30-040" File: "b120418a.wiff"Peak Name: "PFOA" Mass(es): "413.0/369.0 amu,413.0/219.0 amu,413.0/169.0 amu"Comment: "DAL-GW-609R-0-" Annotation: ""Sample Index: 80Sample Type: UnknownConcentration: N/ACalculated Conc: 0.418 ng/mLAcq. Date: 4/19/2012Acq. Time: 5:51:44 PMModified: NoProc. Algorithm: IntelliQuan - MQIINoise Percentage: 50Base. Sub. Window: 1.00 minPeak-Split. Factor: 8Report Largest Peak: YesMin. Peak Height: 0.00 cpsMin. Peak Width: 0.00 secSmoothing Width: 0 pointsRT Window: 30.0 secExpected RT: 15.6 minUse Relative RT: YesInt. Type: Base To BaseRetention Time: 15.6 minArea: 1918963 countsHeight: 5.68e+005 cpsStart Time: 15.4 minEnd Time: 15.7 min13.5 14.0 14.5 15.0 15.5 16.0 16.5 17.0 17.5 18.0Time, min0.05.0e41.0e51.5e52.0e52.5e53.0e53.5e54.0e54.5e55.0e55.5e5

Intensity, cps15.6216.0415.4814.41*** Buster J2930203Batch Name: b120418a.dabData printed by STWPrinting Time: 11:14:12 AMPrinting Date: Thursday, May 03, 2012Page 23 of 28Sample Name: "b120418a086" Sample ID: "GLP10-01-01-30-043" File: "b120418a.wiff"Peak Name: "PFOA" Mass(es): "413.0/369.0 amu,413.0/219.0 amu,413.0/169.0 amu"Comment: "DAL-GW-609L-0-" Annotation: ""Sample Index: 86Sample Type: UnknownConcentration: N/ACalculated Conc: 0.718 ng/mLAcq. Date: 4/19/2012Acq. Time: 8:00:44 PMModified: YesRT Window: 30.0 secExpected RT: 15.6 minUse Relative RT: YesInt. Type: ManualRetention Time: 15.6 minArea: 3226754 countsHeight: 9.28e+005 cpsStart Time: 15.4 minEnd Time: 15.7 min13.5 14.0 14.5 15.0 15.5 16.0 16.5 17.0 17.5 18.0Time, min0.05.0e41.0e51.5e52.0e52.5e53.0e53.5e54.0e54.5e55.0e55.5e56.0e56.5e57.0e57.5e58.0e58.5e59.0e5

Intensity, cps15.6215.4816.0216.0514.41Sample Name: "b120418a088" Sample ID: "GLP10-01-01-30-045" File: "b120418a.wiff"Peak Name: "PFOA" Mass(es): "413.0/369.0 amu,413.0/219.0 amu,413.0/169.0 amu"Comment: "DAL-GW-609L-FMS-" Annotation: ""Sample Index: 88Sample Type: UnknownConcentration: N/ACalculated Conc: 2.68 ng/mLAcq. Date: 4/19/2012Acq. Time: 8:43:42 PMModified: YesRT Window: 30.0 secExpected RT: 15.6 minUse Relative RT: YesInt. Type: ManualRetention Time: 15.6 minArea: 11619804 countsHeight: 3.60e+006 cpsStart Time: 15.3 minEnd Time: 15.8 min13.5 14.0 14.5 15.0 15.5 16.0 16.5 17.0 17.5 18.0Time, min0.02.0e54.0e56.0e58.0e51.0e61.2e61.4e61.6e61.8e62.0e62.2e62.4e62.6e62.8e63.0e63.2e63.4e6

Intensity, cps15.6215.4716.0314.40Sample Name: "b120418a089" Sample ID: "GLP10-01-01-30-046" File: "b120418a.wiff"Peak Name: "PFOA" Mass(es): "413.0/369.0 amu,413.0/219.0 amu,413.0/169.0 amu"Comment: "DAL-GW-610R-0-" Annotation: ""Sample Index: 89Sample Type: UnknownConcentration: N/ACalculated Conc: 1.75 ng/mLAcq. Date: 4/19/2012Acq. Time: 9:05:15 PMModified: YesRT Window: 30.0 secExpected RT: 15.6 minUse Relative RT: YesInt. Type: ManualRetention Time: 15.6 minArea: 8203078 countsHeight: 2.21e+006 cpsStart Time: 15.3 minEnd Time: 15.8 min13.5 14.0 14.5 15.0 15.5 16.0 16.5 17.0 17.5 18.0Time, min0.01.0e52.0e53.0e54.0e55.0e56.0e57.0e58.0e59.0e51.0e61.1e61.2e61.3e61.4e61.5e61.6e61.7e61.8e61.9e62.0e62.1e62.2e6

Intensity, cps15.6215.48Sample Name: "b120418a092" Sample ID: "GLP10-01-01-30-049" File: "b120418a.wiff"Peak Name: "PFOA" Mass(es): "413.0/369.0 amu,413.0/219.0 amu,413.0/169.0 amu"Comment: "DAL-GW-610L-0-" Annotation: ""Sample Index: 92Sample Type: UnknownConcentration: N/ACalculated Conc: 3.09 ng/mLAcq. Date: 4/19/2012Acq. Time: 10:09:49 PMModified: YesRT Window: 30.0 secExpected RT: 15.6 minUse Relative RT: YesInt. Type: ManualRetention Time: 15.6 minArea: 12655602 countsHeight: 3.28e+006 cpsStart Time: 15.3 minEnd Time: 15.8 min13.5 14.0 14.5 15.0 15.5 16.0 16.5 17.0 17.5 18.0Time, min0.02.0e54.0e56.0e58.0e51.0e61.2e61.4e61.6e61.8e62.0e62.2e62.4e62.6e62.8e63.0e63.2e6

Intensity, cps15.6215.48*** Buster J2930203Batch Name: b120418a.dabData printed by STWPrinting Time: 11:14:12 AMPrinting Date: Thursday, May 03, 2012Page 24 of 28Sample Name: "b120418a098" Sample ID: "GLP10-01-01-30-052" File: "b120418a.wiff"Peak Name: "PFOA" Mass(es): "413.0/369.0 amu,413.0/219.0 amu,413.0/169.0 amu"Comment: "DAL-GW-611R-0-" Annotation: ""Sample Index: 98Sample Type: UnknownConcentration: N/ACalculated Conc: 0.579 ng/mLAcq. Date: 4/20/2012Acq. Time: 12:19:09 AMModified: YesRT Window: 30.0 secExpected RT: 15.6 minUse Relative RT: YesInt. Type: ManualRetention Time: 15.6 minArea: 2773580 countsHeight: 8.04e+005 cpsStart Time: 15.4 minEnd Time: 15.7 min13.5 14.0 14.5 15.0 15.5 16.0 16.5 17.0 17.5 18.0Time, min0.05.0e41.0e51.5e52.0e52.5e53.0e53.5e54.0e54.5e55.0e55.5e56.0e56.5e57.0e57.5e58.0e5

Intensity, cps15.63Sample Name: "b120418a101" Sample ID: "GLP10-01-01-30-055" File: "b120418a.wiff"Peak Name: "PFOA" Mass(es): "413.0/369.0 amu,413.0/219.0 amu,413.0/169.0 amu"Comment: "DAL-GW-611L-0-" Annotation: ""Sample Index: 101Sample Type: UnknownConcentration: N/ACalculated Conc: 0.506 ng/mLAcq. Date: 4/20/2012Acq. Time: 1:23:52 AMModified: NoProc. Algorithm: IntelliQuan - MQIINoise Percentage: 50Base. Sub. Window: 1.00 minPeak-Split. Factor: 8Report Largest Peak: YesMin. Peak Height: 0.00 cpsMin. Peak Width: 0.00 secSmoothing Width: 0 pointsRT Window: 30.0 secExpected RT: 15.6 minUse Relative RT: YesInt. Type: Base To BaseRetention Time: 15.6 minArea: 2345751 countsHeight: 6.54e+005 cpsStart Time: 15.4 minEnd Time: 15.7 min13.5 14.0 14.5 15.0 15.5 16.0 16.5 17.0 17.5 18.0Time, min0.05.0e41.0e51.5e52.0e52.5e53.0e53.5e54.0e54.5e55.0e55.5e56.0e56.5e5

Intensity, cps15.6215.4816.0416.1014.40Sample Name: "b120418a103" Sample ID: "GLP10-01-01-30-057" File: "b120418a.wiff"Peak Name: "PFOA" Mass(es): "413.0/369.0 amu,413.0/219.0 amu,413.0/169.0 amu"Comment: "DAL-GW-611L-FMS-" Annotation: ""Sample Index: 103Sample Type: UnknownConcentration: N/ACalculated Conc: 1.68 ng/mLAcq. Date: 4/20/2012Acq. Time: 2:06:59 AMModified: YesRT Window: 30.0 secExpected RT: 15.6 minUse Relative RT: YesInt. Type: ManualRetention Time: 15.6 minArea: 6826546 countsHeight: 2.12e+006 cpsStart Time: 15.4 minEnd Time: 15.8 min13.5 14.0 14.5 15.0 15.5 16.0 16.5 17.0 17.5 18.0Time, min0.01.0e52.0e53.0e54.0e55.0e56.0e57.0e58.0e59.0e51.0e61.1e61.2e61.3e61.4e61.5e61.6e61.7e61.8e61.9e62.0e62.1e6

Intensity, cps15.6215.4816.0314.41Sample Name: "b120418a104" Sample ID: "GLP10-01-01-30-058" File: "b120418a.wiff"Peak Name: "PFOA" Mass(es): "413.0/369.0 amu,413.0/219.0 amu,413.0/169.0 amu"Comment: "DAL-GW-MW121-0-" Annotation: ""Sample Index: 104Sample Type: UnknownConcentration: N/ACalculated Conc: 0.0552 ng/mLAcq. Date: 4/20/2012Acq. Time: 2:28:33 AMModified: YesRT Window: 30.0 secExpected RT: 15.6 minUse Relative RT: YesInt. Type: ManualRetention Time: 15.6 minArea: 281575 countsHeight: 8.09e+004 cpsStart Time: 15.4 minEnd Time: 15.7 min13.5 14.0 14.5 15.0 15.5 16.0 16.5 17.0 17.5 18.0Time, min0.005000.001.00e41.50e42.00e42.50e43.00e43.50e44.00e44.50e45.00e45.50e46.00e46.50e47.00e47.50e48.00e48.50e49.00e49.50e41.00e51.05e5

Intensity, cps16.04*** Buster J2930203Batch Name: b120418a.dabData printed by STWPrinting Time: 11:14:12 AMPrinting Date: Thursday, May 03, 2012Page 25 of 28Sample Name: "b120418a106" Sample ID: "GLP10-01-01-30-060" File: "b120418a.wiff"Peak Name: "PFOA" Mass(es): "413.0/369.0 amu,413.0/219.0 amu,413.0/169.0 amu"Comment: "DAL-GW-MW121-FMS-" Annotation: ""Sample Index: 106Sample Type: UnknownConcentration: N/ACalculated Conc: 1.05 ng/mLAcq. Date: 4/20/2012Acq. Time: 3:11:40 AMModified: NoProc. Algorithm: IntelliQuan - MQIINoise Percentage: 50Base. Sub. Window: 1.00 minPeak-Split. Factor: 8Report Largest Peak: YesMin. Peak Height: 0.00 cpsMin. Peak Width: 0.00 secSmoothing Width: 0 pointsRT Window: 30.0 secExpected RT: 15.6 minUse Relative RT: YesInt. Type: Base To BaseRetention Time: 15.6 minArea: 5236514 countsHeight: 1.71e+006 cpsStart Time: 15.4 minEnd Time: 15.8 min13.5 14.0 14.5 15.0 15.5 16.0 16.5 17.0 17.5 18.0Time, min0.01.0e52.0e53.0e54.0e55.0e56.0e57.0e58.0e59.0e51.0e61.1e61.2e61.3e61.4e61.5e61.6e61.7e6

Intensity, cps15.6216.0414.4115.48Sample Name: "b120418a110" Sample ID: "GLP10-01-01-30-061" File: "b120418a.wiff"Peak Name: "PFOA" Mass(es): "413.0/369.0 amu,413.0/219.0 amu,413.0/169.0 amu"Comment: "DAL-GW-MW47-0-" Annotation: ""Sample Index: 110Sample Type: UnknownConcentration: N/ACalculated Conc: 0.233 ng/mLAcq. Date: 4/20/2012Acq. Time: 4:37:44 AMModified: NoProc. Algorithm: IntelliQuan - MQIINoise Percentage: 50Base. Sub. Window: 1.00 minPeak-Split. Factor: 8Report Largest Peak: YesMin. Peak Height: 0.00 cpsMin. Peak Width: 0.00 secSmoothing Width: 0 pointsRT Window: 30.0 secExpected RT: 15.6 minUse Relative RT: YesInt. Type: Base To BaseRetention Time: 15.6 minArea: 1227033 countsHeight: 3.41e+005 cpsStart Time: 15.4 minEnd Time: 15.7 min13.5 14.0 14.5 15.0 15.5 16.0 16.5 17.0 17.5 18.0Time, min0.02.0e44.0e46.0e48.0e41.0e51.2e51.4e51.6e51.8e52.0e52.2e52.4e52.6e52.8e53.0e53.2e53.4e5

Intensity, cps15.6216.03Sample Name: "b120418a112" Sample ID: "GLP10-01-01-30-063" File: "b120418a.wiff"Peak Name: "PFOA" Mass(es): "413.0/369.0 amu,413.0/219.0 amu,413.0/169.0 amu"Comment: "DAL-GW-MW47-FMS-" Annotation: ""Sample Index: 112Sample Type: UnknownConcentration: N/ACalculated Conc: 1.14 ng/mLAcq. Date: 4/20/2012Acq. Time: 5:20:49 AMModified: NoProc. Algorithm: IntelliQuan - MQIINoise Percentage: 50Base. Sub. Window: 1.00 minPeak-Split. Factor: 8Report Largest Peak: YesMin. Peak Height: 0.00 cpsMin. Peak Width: 0.00 secSmoothing Width: 0 pointsRT Window: 30.0 secExpected RT: 15.6 minUse Relative RT: YesInt. Type: Base To BaseRetention Time: 15.6 minArea: 5829068 countsHeight: 1.84e+006 cpsStart Time: 15.4 minEnd Time: 15.8 min13.5 14.0 14.5 15.0 15.5 16.0 16.5 17.0 17.5 18.0Time, min0.01.0e52.0e53.0e54.0e55.0e56.0e57.0e58.0e59.0e51.0e61.1e61.2e61.3e61.4e61.5e61.6e61.7e61.8e6

Intensity, cps15.6216.0315.4814.41Sample Name: "b120418a113" Sample ID: "GLP10-01-01-30-064" File: "b120418a.wiff"Peak Name: "PFOA" Mass(es): "413.0/369.0 amu,413.0/219.0 amu,413.0/169.0 amu"Comment: "DAL-GW-MW13S-0-" Annotation: ""Sample Index: 113Sample Type: UnknownConcentration: N/ACalculated Conc: 0.0215 ng/mLAcq. Date: 4/20/2012Acq. Time: 5:42:19 AMModified: NoProc. Algorithm: IntelliQuan - MQIINoise Percentage: 50Base. Sub. Window: 1.00 minPeak-Split. Factor: 8Report Largest Peak: YesMin. Peak Height: 0.00 cpsMin. Peak Width: 0.00 secSmoothing Width: 0 pointsRT Window: 30.0 secExpected RT: 15.6 minUse Relative RT: YesInt. Type: Base To BaseRetention Time: 15.5 minArea: 126228 countsHeight: 1.81e+004 cpsStart Time: 15.4 minEnd Time: 15.7 min13.5 14.0 14.5 15.0 15.5 16.0 16.5 17.0 17.5 18.0Time, min0.005000.001.00e41.50e42.00e42.50e43.00e43.50e44.00e44.50e45.00e45.50e46.00e46.50e47.00e47.50e48.00e48.50e49.00e49.50e41.00e5

Intensity, cps16.03*** Buster J2930203Batch Name: b120418a.dabData printed by STWPrinting Time: 11:14:13 AMPrinting Date: Thursday, May 03, 2012Page 26 of 28Sample Name: "b120418a116" Sample ID: "GLP10-01-01-30-067" File: "b120418a.wiff"Peak Name: "PFOA" Mass(es): "413.0/369.0 amu,413.0/219.0 amu,413.0/169.0 amu"Comment: "DAL-GW-MW13I-0-" Annotation: ""Sample Index: 116Sample Type: UnknownConcentration: N/ACalculated Conc: 0.0505 ng/mLAcq. Date: 4/20/2012Acq. Time: 6:46:56 AMModified: NoProc. Algorithm: IntelliQuan - MQIINoise Percentage: 50Base. Sub. Window: 1.00 minPeak-Split. Factor: 8Report Largest Peak: YesMin. Peak Height: 0.00 cpsMin. Peak Width: 0.00 secSmoothing Width: 0 pointsRT Window: 30.0 secExpected RT: 15.6 minUse Relative RT: YesInt. Type: Base To BaseRetention Time: 15.6 minArea: 284452 countsHeight: 5.00e+004 cpsStart Time: 15.4 minEnd Time: 15.7 min13.5 14.0 14.5 15.0 15.5 16.0 16.5 17.0 17.5 18.0Time, min0.005000.001.00e41.50e42.00e42.50e43.00e43.50e44.00e44.50e45.00e45.50e46.00e46.50e47.00e47.50e48.00e48.50e49.00e49.50e41.00e51.05e51.10e5

Intensity, cps16.0416.0714.4015.6215.4816.5217.4116.93Sample Name: "b120418a122" Sample ID: "GLP10-01-01-30-070" File: "b120418a.wiff"Peak Name: "PFOA" Mass(es): "413.0/369.0 amu,413.0/219.0 amu,413.0/169.0 amu"Comment: "DAL-GW-MW13B-0-" Annotation: ""Sample Index: 122Sample Type: UnknownConcentration: N/ACalculated Conc: 0.0854 ng/mLAcq. Date: 4/20/2012Acq. Time: 8:56:05 AMModified: YesRT Window: 30.0 secExpected RT: 15.6 minUse Relative RT: YesInt. Type: ManualRetention Time: 15.6 minArea: 451579 countsHeight: 9.87e+004 cpsStart Time: 15.4 minEnd Time: 15.7 min13.5 14.0 14.5 15.0 15.5 16.0 16.5 17.0 17.5 18.0Time, min0.005000.001.00e41.50e42.00e42.50e43.00e43.50e44.00e44.50e45.00e45.50e46.00e46.50e47.00e47.50e48.00e48.50e49.00e49.50e41.00e5

Intensity, cps16.0215.6114.3915.4716.1817.1917.4616.8817.83Sample Name: "b120418a124" Sample ID: "GLP10-01-01-30-072" File: "b120418a.wiff"Peak Name: "PFOA" Mass(es): "413.0/369.0 amu,413.0/219.0 amu,413.0/169.0 amu"Comment: "DAL-GW-MW13B-FMS-" Annotation: ""Sample Index: 124Sample Type: UnknownConcentration: N/ACalculated Conc: 1.06 ng/mLAcq. Date: 4/20/2012Acq. Time: 9:39:06 AMModified: NoProc. Algorithm: IntelliQuan - MQIINoise Percentage: 50Base. Sub. Window: 1.00 minPeak-Split. Factor: 8Report Largest Peak: YesMin. Peak Height: 0.00 cpsMin. Peak Width: 0.00 secSmoothing Width: 0 pointsRT Window: 30.0 secExpected RT: 15.6 minUse Relative RT: YesInt. Type: Base To BaseRetention Time: 15.6 minArea: 5260822 countsHeight: 1.68e+006 cpsStart Time: 15.4 minEnd Time: 15.8 min13.5 14.0 14.5 15.0 15.5 16.0 16.5 17.0 17.5 18.0Time, min0.01.0e52.0e53.0e54.0e55.0e56.0e57.0e58.0e59.0e51.0e61.1e61.2e61.3e61.4e61.5e61.6e6

Intensity, cps15.6116.0115.4614.40Sample Name: "b120418a125" Sample ID: "GLP10-01-01-30-073" File: "b120418a.wiff"Peak Name: "PFOA" Mass(es): "413.0/369.0 amu,413.0/219.0 amu,413.0/169.0 amu"Comment: "DAL-GW-604L-RB-" Annotation: ""Sample Index: 125Sample Type: UnknownConcentration: N/ACalculated Conc: < 0Acq. Date: 4/20/2012Acq. Time: 10:00:31 AMModified: NoProc. Algorithm: IntelliQuan - MQIINoise Percentage: 50Base. Sub. Window: 1.00 minPeak-Split. Factor: 8Report Largest Peak: YesMin. Peak Height: 0.00 cpsMin. Peak Width: 0.00 secSmoothing Width: 0 pointsRT Window: 30.0 secExpected RT: 15.6 minUse Relative RT: YesInt. Type: Base To BaseRetention Time: 15.6 minArea: 7451 countsHeight: 4.24e+003 cpsStart Time: 15.6 minEnd Time: 15.6 min13.5 14.0 14.5 15.0 15.5 16.0 16.5 17.0 17.5 18.0Time, min0.005000.001.00e41.50e42.00e42.50e43.00e43.50e44.00e44.50e45.00e45.50e46.00e46.50e47.00e47.50e48.00e48.50e49.00e49.50e41.00e5

Intensity, cps16.0116.05*** Buster J2930203Batch Name: b120418a.dabData printed by STWPrinting Time: 11:14:13 AMPrinting Date: Thursday, May 03, 2012Page 27 of 28Sample Name: "b120418a126" Sample ID: "GLP10-01-01-30-074" File: "b120418a.wiff"Peak Name: "PFOA" Mass(es): "413.0/369.0 amu,413.0/219.0 amu,413.0/169.0 amu"Comment: "DAL-GW-607R-RB-" Annotation: ""Sample Index: 126Sample Type: UnknownConcentration: N/ACalculated Conc: < 0Acq. Date: 4/20/2012Acq. Time: 10:22:03 AMModified: NoProc. Algorithm: IntelliQuan - MQIINoise Percentage: 50Base. Sub. Window: 1.00 minPeak-Split. Factor: 8Report Largest Peak: YesMin. Peak Height: 0.00 cpsMin. Peak Width: 0.00 secSmoothing Width: 0 pointsRT Window: 30.0 secExpected RT: 15.6 minUse Relative RT: YesInt. Type: Base To BaseRetention Time: 15.6 minArea: 11514 countsHeight: 4.26e+003 cpsStart Time: 15.6 minEnd Time: 15.7 min13.5 14.0 14.5 15.0 15.5 16.0 16.5 17.0 17.5 18.0Time, min0.005000.001.00e41.50e42.00e42.50e43.00e43.50e44.00e44.50e45.00e45.50e46.00e46.50e47.00e47.50e48.00e48.50e49.00e49.50e41.00e51.05e51.10e5

Intensity, cps16.0214.3915.9316.2316.4817.3017.7916.8215.74Sample Name: "b120418a127" Sample ID: "GLP10-01-01-30-075" File: "b120418a.wiff"Peak Name: "PFOA" Mass(es): "413.0/369.0 amu,413.0/219.0 amu,413.0/169.0 amu"Comment: "DAL-GW-TRIP01-0-" Annotation: ""Sample Index: 127Sample Type: UnknownConcentration: N/ACalculated Conc: < 0Acq. Date: 4/20/2012Acq. Time: 10:43:37 AMModified: YesRT Window: 30.0 secExpected RT: 15.6 minUse Relative RT: YesInt. Type: ManualRetention Time: 15.6 minArea: 11900 countsHeight: 4.69e+003 cpsStart Time: 15.6 minEnd Time: 15.7 min13.5 14.0 14.5 15.0 15.5 16.0 16.5 17.0 17.5 18.0Time, min0.005000.001.00e41.50e42.00e42.50e43.00e43.50e44.00e44.50e45.00e45.50e46.00e46.50e47.00e47.50e48.00e48.50e49.00e49.50e41.00e51.05e51.10e51.15e5

Intensity, cps16.0214.4015.9317.1416.5915.1617.5417.9815.76Sample Name: "b120418a128" Sample ID: "GLP10-01-01-30-076" File: "b120418a.wiff"Peak Name: "PFOA" Mass(es): "413.0/369.0 amu,413.0/219.0 amu,413.0/169.0 amu"Comment: "DAL-GW-TRIP01-FMS-" Annotation: ""Sample Index: 128Sample Type: UnknownConcentration: N/ACalculated Conc: 1.03 ng/mLAcq. Date: 4/20/2012Acq. Time: 11:05:06 AMModified: NoProc. Algorithm: IntelliQuan - MQIINoise Percentage: 50Base. Sub. Window: 1.00 minPeak-Split. Factor: 8Report Largest Peak: YesMin. Peak Height: 0.00 cpsMin. Peak Width: 0.00 secSmoothing Width: 0 pointsRT Window: 30.0 secExpected RT: 15.6 minUse Relative RT: YesInt. Type: Base To BaseRetention Time: 15.6 minArea: 5133430 countsHeight: 1.78e+006 cpsStart Time: 15.4 minEnd Time: 15.7 min13.5 14.0 14.5 15.0 15.5 16.0 16.5 17.0 17.5 18.0Time, min0.01.0e52.0e53.0e54.0e55.0e56.0e57.0e58.0e59.0e51.0e61.1e61.2e61.3e61.4e61.5e61.6e61.7e6

Intensity, cps15.6116.0114.3915.47*** Buster J2930203Batch Name: b120418a.dabData printed by STWPrinting Time: 11:14:13 AMPrinting Date: Thursday, May 03, 2012Page 28 of 28b120418a external.rdb (13C4PFOA-Surr): "Quadratic" Regression ("1 / x" weighting): y = -1.88e+005 x^2 + 3.39e+006 x + 7.49e+004(r = 0.9999)0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0 6.5 7.0 7.5 8.0 8.5 9.0 9.5 10.0Concentration, ng/mL0.01.0e62.0e63.0e64.0e65.0e66.0e67.0e68.0e69.0e61.0e71.1e71.2e71.3e71.4e71.5e71.6e71.7e71.8e7

Area, countsWorkstation: ETSBUSTERBatch Name: b120418a.dab*Data worked up by KJUPage 1 of 1Printing Time: 12:39:10 PMPrinting Date: Monday, April 23, 2012b120418a external.rdb (PFOA): "Quadratic" Regression ("1 / x" weighting): y = -7.61e+004 x^2 + 4.42e+006 x + 4.28e+004 (r = 0.9980)0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24Concentration, ng/mL0.05.0e61.0e71.5e72.0e72.5e73.0e73.5e74.0e74.5e75.0e75.5e76.0e76.5e7

Area, countsWorkstation: ETSBUSTERBatch Name: b120418a.dab*Data worked up by KJUPage 1 of 1Printing Time: 12:38:52 PMPrinting Date: Monday, April 23, 2012Sample Name: "b120418a017" Sample ID: "11012-62-8" File: "b120418a.wiff"Peak Name: "13C4PFOA-Surr" Mass(es): "417.0/372.0 amu"Comment: "1.0 ng/mL FC std in Synth. Water" Annotation: ""Sample Index: 17Sample Type: StandardConcentration: 0.998 ng/mLCalculated Conc: 1.01 ng/mLAcq. Date: 4/18/2012Acq. Time: 7:17:13 PMModified: NoProc. Algorithm: IntelliQuan - IQAMin. Peak Height: 0.00 cpsMin. Peak Width: 0.00 secSmoothing Width: 3 pointsRT Window: 30.0 secExpected RT: 15.6 minUse Relative RT: NoInt. Type: ValleyRetention Time: 15.6 minArea: 3298983 countsHeight: 1.03e+006 cpsStart Time: 15.5 minEnd Time: 15.9 min13.5 14.0 14.5 15.0 15.5 16.0 16.5 17.0 17.5 18.0Time, min0.005.00e41.00e51.50e52.00e52.50e53.00e53.50e54.00e54.50e55.00e55.50e56.00e56.50e57.00e57.50e58.00e58.50e59.00e59.50e51.00e6

Intensity, cps15.63Sample Name: "b120418a023" Sample ID: "12001-1" File: "b120418a.wiff"Peak Name: "13C4PFOA-Surr" Mass(es): "417.0/372.0 amu"Comment: "Method Blank" Annotation: ""Sample Index: 23Sample Type: UnknownConcentration: N/ACalculated Conc: 0.00416 ng/mLAcq. Date: 4/18/2012Acq. Time: 9:26:07 PMModified: NoProc. Algorithm: IntelliQuan - IQAMin. Peak Height: 0.00 cpsMin. Peak Width: 0.00 secSmoothing Width: 3 pointsRT Window: 30.0 secExpected RT: 15.6 minUse Relative RT: NoInt. Type: ValleyRetention Time: 15.6 minArea: 88956 countsHeight: 2.95e+004 cpsStart Time: 15.5 minEnd Time: 15.8 min13.5 14.0 14.5 15.0 15.5 16.0 16.5 17.0 17.5 18.0Time, min0.02000.04000.06000.08000.01.0e41.2e41.4e41.6e41.8e42.0e42.2e42.4e42.6e42.8e4

Intensity, cpsSample Name: "b120418a026" Sample ID: "LCS-120416-1" File: "b120418a.wiff"Peak Name: "13C4PFOA-Surr" Mass(es): "417.0/372.0 amu"Comment: "0.2ppb LCS" Annotation: ""Sample Index: 26Sample Type: QCConcentration: 0.198 ng/mLCalculated Conc: 0.206 ng/mLAcq. Date: 4/18/2012Acq. Time: 10:30:41 PMModified: NoProc. Algorithm: IntelliQuan - IQAMin. Peak Height: 0.00 cpsMin. Peak Width: 0.00 secSmoothing Width: 3 pointsRT Window: 30.0 secExpected RT: 15.6 minUse Relative RT: NoInt. Type: ValleyRetention Time: 15.6 minArea: 763597 countsHeight: 2.50e+005 cpsStart Time: 15.5 minEnd Time: 15.9 min13.5 14.0 14.5 15.0 15.5 16.0 16.5 17.0 17.5 18.0Time, min0.01.0e42.0e43.0e44.0e45.0e46.0e47.0e48.0e49.0e41.0e51.1e51.2e51.3e51.4e51.5e51.6e51.7e51.8e51.9e52.0e52.1e52.2e52.3e52.4e5

Intensity, cps15.64Sample Name: "b120418a029" Sample ID: "LCS-120416-4" File: "b120418a.wiff"Peak Name: "13C4PFOA-Surr" Mass(es): "417.0/372.0 amu"Comment: "2ppb LCS" Annotation: ""Sample Index: 29Sample Type: QCConcentration: 1.98 ng/mLCalculated Conc: 2.07 ng/mLAcq. Date: 4/18/2012Acq. Time: 11:35:06 PMModified: NoProc. Algorithm: IntelliQuan - IQAMin. Peak Height: 0.00 cpsMin. Peak Width: 0.00 secSmoothing Width: 3 pointsRT Window: 30.0 secExpected RT: 15.6 minUse Relative RT: NoInt. Type: ValleyRetention Time: 15.6 minArea: 6276098 countsHeight: 1.89e+006 cpsStart Time: 15.5 minEnd Time: 15.9 min13.5 14.0 14.5 15.0 15.5 16.0 16.5 17.0 17.5 18.0Time, min0.01.0e52.0e53.0e54.0e55.0e56.0e57.0e58.0e59.0e51.0e61.1e61.2e61.3e61.4e61.5e61.6e61.7e61.8e6

Intensity, cps15.64*** Buster J2930203Batch Name: b120418a.dabData printed by STWPrinting Time: 11:20:02 AMPrinting Date: Thursday, May 03, 2012Page 1 of 4Sample Name: "b120418a032" Sample ID: "LCS-120416-7" File: "b120418a.wiff"Peak Name: "13C4PFOA-Surr" Mass(es): "417.0/372.0 amu"Comment: "10ppb LCS" Annotation: ""Sample Index: 32Sample Type: QCConcentration: 0.00 ng/mLCalculated Conc: < 0Acq. Date: 4/19/2012Acq. Time: 12:39:30 AMModified: NoProc. Algorithm: IntelliQuan - IQAMin. Peak Height: 0.00 cpsMin. Peak Width: 0.00 secSmoothing Width: 3 pointsRT Window: 30.0 secExpected RT: 15.6 minUse Relative RT: NoInt. Type: ValleyRetention Time: 15.6 minArea: 66855 countsHeight: 2.11e+004 cpsStart Time: 15.5 minEnd Time: 15.8 min13.5 14.0 14.5 15.0 15.5 16.0 16.5 17.0 17.5 18.0Time, min0.01000.02000.03000.04000.05000.06000.07000.08000.09000.01.0e41.1e41.2e41.3e41.4e41.5e41.6e41.7e41.8e41.9e42.0e42.1e4

Intensity, cpsSample Name: "b120418a038" Sample ID: "GLP10-01-01-30-004" File: "b120418a.wiff"Peak Name: "13C4PFOA-Surr" Mass(es): "417.0/372.0 amu"Comment: "DAL-GW-602S-0-" Annotation: ""Sample Index: 38Sample Type: UnknownConcentration: N/ACalculated Conc: 0.0991 ng/mLAcq. Date: 4/19/2012Acq. Time: 2:48:35 AMModified: NoProc. Algorithm: IntelliQuan - IQAMin. Peak Height: 0.00 cpsMin. Peak Width: 0.00 secSmoothing Width: 3 pointsRT Window: 30.0 secExpected RT: 15.6 minUse Relative RT: NoInt. Type: ValleyRetention Time: 15.6 minArea: 409085 countsHeight: 1.38e+005 cpsStart Time: 15.5 minEnd Time: 15.8 min13.5 14.0 14.5 15.0 15.5 16.0 16.5 17.0 17.5 18.0Time, min0.05000.01.0e41.5e42.0e42.5e43.0e43.5e44.0e44.5e45.0e45.5e46.0e46.5e47.0e47.5e48.0e48.5e49.0e49.5e41.0e51.1e51.1e51.2e51.2e51.3e51.3e51.4e5

Intensity, cps15.63Sample Name: "b120418a040" Sample ID: "GLP10-01-01-30-006" File: "b120418a.wiff"Peak Name: "13C4PFOA-Surr" Mass(es): "417.0/372.0 amu"Comment: "DAL-GW-602S-FMS-" Annotation: ""Sample Index: 40Sample Type: UnknownConcentration: N/ACalculated Conc: 0.0825 ng/mLAcq. Date: 4/19/2012Acq. Time: 3:31:41 AMModified: NoProc. Algorithm: IntelliQuan - IQAMin. Peak Height: 0.00 cpsMin. Peak Width: 0.00 secSmoothing Width: 3 pointsRT Window: 30.0 secExpected RT: 15.6 minUse Relative RT: NoInt. Type: ValleyRetention Time: 15.6 minArea: 353321 countsHeight: 1.18e+005 cpsStart Time: 15.5 minEnd Time: 15.8 min13.5 14.0 14.5 15.0 15.5 16.0 16.5 17.0 17.5 18.0Time, min0.005000.001.00e41.50e42.00e42.50e43.00e43.50e44.00e44.50e45.00e45.50e46.00e46.50e47.00e47.50e48.00e48.50e49.00e49.50e41.00e51.05e51.10e51.15e5

Intensity, cps15.64Sample Name: "b120418a017" Sample ID: "11012-62-8" File: "b120418a.wiff"Peak Name: "PFOA" Mass(es): "413.0/369.0 amu,413.0/219.0 amu,413.0/169.0 amu"Comment: "1.0 ng/mL FC std in Synth. Water" Annotation: ""Sample Index: 17Sample Type: StandardConcentration: 0.958 ng/mLCalculated Conc: 1.03 ng/mLAcq. Date: 4/18/2012Acq. Time: 7:17:13 PMModified: YesRT Window: 30.0 secExpected RT: 15.6 minUse Relative RT: NoInt. Type: ManualRetention Time: 15.6 minArea: 4517678 countsHeight: 1.17e+006 cpsStart Time: 15.3 minEnd Time: 15.8 min13.5 14.0 14.5 15.0 15.5 16.0 16.5 17.0 17.5 18.0Time, min0.005.00e41.00e51.50e52.00e52.50e53.00e53.50e54.00e54.50e55.00e55.50e56.00e56.50e57.00e57.50e58.00e58.50e59.00e59.50e51.00e61.05e61.10e61.15e6

Intensity, cps15.6415.5016.0414.42*** Buster J2930203Batch Name: b120418a.dabData printed by STWPrinting Time: 11:20:02 AMPrinting Date: Thursday, May 03, 2012Page 2 of 4Sample Name: "b120418a023" Sample ID: "12001-1" File: "b120418a.wiff"Peak Name: "PFOA" Mass(es): "413.0/369.0 amu,413.0/219.0 amu,413.0/169.0 amu"Comment: "Method Blank" Annotation: ""Sample Index: 23Sample Type: UnknownConcentration: N/ACalculated Conc: < 0Acq. Date: 4/18/2012Acq. Time: 9:26:07 PMModified: NoProc. Algorithm: IntelliQuan - MQIINoise Percentage: 50Base. Sub. Window: 1.00 minPeak-Split. Factor: 8Report Largest Peak: YesMin. Peak Height: 0.00 cpsMin. Peak Width: 0.00 secSmoothing Width: 3 pointsRT Window: 30.0 secExpected RT: 15.6 minUse Relative RT: NoInt. Type: Base To BaseRetention Time: 15.6 minArea: 14095 countsHeight: 5.09e+003 cpsStart Time: 15.6 minEnd Time: 15.7 min13.5 14.0 14.5 15.0 15.5 16.0 16.5 17.0 17.5 18.0Time, min0.05000.01.0e41.5e42.0e42.5e43.0e43.5e44.0e44.5e45.0e45.5e46.0e46.5e47.0e47.5e48.0e48.5e4

Intensity, cps16.04Sample Name: "b120418a026" Sample ID: "LCS-120416-1" File: "b120418a.wiff"Peak Name: "PFOA" Mass(es): "413.0/369.0 amu,413.0/219.0 amu,413.0/169.0 amu"Comment: "0.2ppb LCS" Annotation: ""Sample Index: 26Sample Type: QCConcentration: 0.190 ng/mLCalculated Conc: 0.202 ng/mLAcq. Date: 4/18/2012Acq. Time: 10:30:41 PMModified: YesRT Window: 30.0 secExpected RT: 15.6 minUse Relative RT: NoInt. Type: ManualRetention Time: 15.6 minArea: 932242 countsHeight: 2.45e+005 cpsStart Time: 15.4 minEnd Time: 15.8 min13.5 14.0 14.5 15.0 15.5 16.0 16.5 17.0 17.5 18.0Time, min0.01.0e42.0e43.0e44.0e45.0e46.0e47.0e48.0e49.0e41.0e51.1e51.2e51.3e51.4e51.5e51.6e51.7e51.8e51.9e52.0e52.1e52.2e52.3e52.4e5

Intensity, cps15.6516.0614.4315.5116.1916.4117.4217.2017.81Sample Name: "b120418a029" Sample ID: "LCS-120416-4" File: "b120418a.wiff"Peak Name: "PFOA" Mass(es): "413.0/369.0 amu,413.0/219.0 amu,413.0/169.0 amu"Comment: "2ppb LCS" Annotation: ""Sample Index: 29Sample Type: QCConcentration: 1.90 ng/mLCalculated Conc: 2.15 ng/mLAcq. Date: 4/18/2012Acq. Time: 11:35:06 PMModified: YesRT Window: 30.0 secExpected RT: 15.6 minUse Relative RT: NoInt. Type: ManualRetention Time: 15.6 minArea: 9164274 countsHeight: 2.33e+006 cpsStart Time: 15.3 minEnd Time: 15.8 min13.5 14.0 14.5 15.0 15.5 16.0 16.5 17.0 17.5 18.0Time, min0.01.0e52.0e53.0e54.0e55.0e56.0e57.0e58.0e59.0e51.0e61.1e61.2e61.3e61.4e61.5e61.6e61.7e61.8e61.9e62.0e62.1e62.2e62.3e6

Intensity, cps15.6415.5016.0514.43Sample Name: "b120418a032" Sample ID: "LCS-120416-7" File: "b120418a.wiff"Peak Name: "PFOA" Mass(es): "413.0/369.0 amu,413.0/219.0 amu,413.0/169.0 amu"Comment: "10ppb LCS" Annotation: ""Sample Index: 32Sample Type: QCConcentration: 9.52 ng/mLCalculated Conc: 9.47 ng/mLAcq. Date: 4/19/2012Acq. Time: 12:39:30 AMModified: YesRT Window: 30.0 secExpected RT: 15.6 minUse Relative RT: NoInt. Type: ManualRetention Time: 15.6 minArea: 35037998 countsHeight: 7.53e+006 cpsStart Time: 15.3 minEnd Time: 15.8 min13.5 14.0 14.5 15.0 15.5 16.0 16.5 17.0 17.5 18.0Time, min0.05.0e51.0e61.5e62.0e62.5e63.0e63.5e64.0e64.5e65.0e65.5e66.0e66.5e67.0e67.5e6

Intensity, cps15.6415.49*** Buster J2930203Batch Name: b120418a.dabData printed by STWPrinting Time: 11:20:02 AMPrinting Date: Thursday, May 03, 2012Page 3 of 4Sample Name: "b120418a038" Sample ID: "GLP10-01-01-30-004" File: "b120418a.wiff"Peak Name: "PFOA" Mass(es): "413.0/369.0 amu,413.0/219.0 amu,413.0/169.0 amu"Comment: "DAL-GW-602S-0-" Annotation: ""Sample Index: 38Sample Type: UnknownConcentration: N/ACalculated Conc: 0.494 ng/mLAcq. Date: 4/19/2012Acq. Time: 2:48:35 AMModified: YesRT Window: 30.0 secExpected RT: 15.6 minUse Relative RT: NoInt. Type: ManualRetention Time: 15.6 minArea: 2205953 countsHeight: 5.63e+005 cpsStart Time: 15.3 minEnd Time: 15.8 min13.5 14.0 14.5 15.0 15.5 16.0 16.5 17.0 17.5 18.0Time, min0.02.0e44.0e46.0e48.0e41.0e51.2e51.4e51.6e51.8e52.0e52.2e52.4e52.6e52.8e53.0e53.2e53.4e53.6e53.8e54.0e54.2e54.4e54.6e54.8e55.0e55.2e55.4e5

Intensity, cps15.63Sample Name: "b120418a040" Sample ID: "GLP10-01-01-30-006" File: "b120418a.wiff"Peak Name: "PFOA" Mass(es): "413.0/369.0 amu,413.0/219.0 amu,413.0/169.0 amu"Comment: "DAL-GW-602S-FMS-" Annotation: ""Sample Index: 40Sample Type: UnknownConcentration: N/ACalculated Conc: 1.60 ng/mLAcq. Date: 4/19/2012Acq. Time: 3:31:41 AMModified: YesRT Window: 30.0 secExpected RT: 15.6 minUse Relative RT: NoInt. Type: ManualRetention Time: 15.6 minArea: 6925174 countsHeight: 2.08e+006 cpsStart Time: 15.3 minEnd Time: 15.8 min13.5 14.0 14.5 15.0 15.5 16.0 16.5 17.0 17.5 18.0Time, min0.01.0e52.0e53.0e54.0e55.0e56.0e57.0e58.0e59.0e51.0e61.1e61.2e61.3e61.4e61.5e61.6e61.7e61.8e61.9e62.0e6

Intensity, cps15.6415.5016.06*** Buster J2930203Batch Name: b120418a.dabData printed by STWPrinting Time: 11:20:02 AMPrinting Date: Thursday, May 03, 2012Page 4 of 4

# A TTACHMENT 

# C: A NALYTICAL 

# M ETHOD 

# ( S 

# )

### ETS -8- 044. 1 Page 2 of 22

Method of Analysis for the Determination of Perfluorinated Compounds in Wate r by LC/MS/MS;

Direct Injection Analysis 

## 1 Scope and Application

This method describes the direct injection analysis of perfluorinated compounds (PFCs) from

water matrices using high

- performance liquid chromatography tandem mass spectrometry

(HPLC/MS/MS). The method is generally applicable but not limited to the measurement of

perfluoroalkyl sulfonamides and perfluorinated alkyl acids (PFAAs) such as perfluorosulfonic

acids (PFSAs) and perfluorocarboxylic acids (PFCAs) (Table 1). Water samples containing

heavy particulate may require preparation by an alternate method such as ETS -8- 154

“ Determination of Perfluorinated Acids, Alcohols, Amides, and Sulfonates In Water By Solid

Phase Extraction and High Performance Liquid Chromatography/Mass Spectrometry ”. The

method is applicable to both external standard and internal standard calibration 1



### .

Table 1. Representative Tar get Analytes

**Acronym Analyte**  **Chemical Abstract Services**

**Registry Number (CASRN)**

PFBA (C4 Acid) Perfluorobutanoic acid 375

- 22

- 4

PFPeA (C5 Acid) Perfluoropentanoic acid 2706

- 90

- 3

PFHxA (C6 Acid) Perfluorohexanoic acid 307

- 24

- 4

PFHpA (C7 Acid) Perfluoroheptanoic acid 375

- 85

- 9

PFOA (C8 Acid) Perfluorooctanoic acid 335

- 67

- 1

PFNA (C9 Acid) Perfluorononanoic acid 375

- 95

- 1

PFDA (C10 Acid) Perfluorodecanoic acid 335

- 76

- 2

PFUnA (C11 Acid) Perfluoroundecanoic acid 2058

- 94

- 8

PFDoA (C12 Acid) Perfluorododecanoic acid 307

- 55

- 1

PF TrD A (C1 3 Acid) Perfluorotridecanoic acid 72629

- 94

- 8

PFBS (C4 Sulfonate) Perfluorobutanesulfonic acid 375

- 73

- 5

PFHS (C6 Sulfonate) Perfluorohexanesulfonic acid 355

- 46

- 4

PFOS (C8 Sulfonate) Perfluorooctanesulfonic acid 1763

- 23

- 1

FBSA (C4 Sulfonamide Perfluorobutanesulfonamide 30334

- 69

- 1

FOSA (C8 Sulfonamide) Pefluorooctanesulfonamide 754

- 91

- 6



### The Minimum Reporting Level (MRL) is the Limit of Quantitation (LOQ) that meets Data

Quality Objectives (DQOs) that are developed based on the intended use of this method.

Method Flexibility

– This is a performance

- based method and may be generally applied to the

determination of perfluorinated compounds in water matrices when analysis batch quality

c ontrol ( QC ) criteria are met 2



### . Each set of samples are prepared in an analysis batch with

calibration standards, LCS s, blanks, and continuing calibration check standards analyzed on

the same instrument during a time period that begins and ends with the analysis of the

appropriate continuing calibration check standards. The laboratory is permitted to modify the

LC column, mobile phase composition, LC conditions, and MS/MS conditions. Method

modifications should be considered to improve method performance or to meet data quality

objectives for the study. In all cases where method modifications are implemented, the batch

1 

### The method is supported by validation with internal standard calibration for C4

- C13 PFCAs, C4, C6, and C8 PFSAs,

and C8 perfluoroalkane sulfonamide in laboratory control samples under 3M method validation E11

- 0667.

2 

### Guidance for establishing method QC Criteria based on a.) FDA May 2001, “Guidance for Industry, Bioanalytical

Method Vali dation”, b.) EPA Method 537, and c.) European Commission: Guidance for Generating and Reporting

Methods of Analysis in Support of Pre

- registration Data Requirements for Annex II (Part A, section 4) and Annex III

(Part A,section 5) of Directive 91/414, SANCO/3029/99 rev. 4 (11/07/00).

### ETS -8- 044. 1 Page 3 of 22

Method of Analysis for the Determination of Perfluorinated Compounds in Wate r by LC/MS/MS;

Direct Injection Analysis analytical QCs ( section 9) must be completed and pass QC acceptance criteria ( section 13 ) if

the data from the analytical batch are to be reported

.



## 2 Method Summary

Water samples are analyzed as neat aqueous sample or as solvent diluted aqueous samples

by direct injection using LC/ MS/MS. Samples containing heavy particulate may not be

suitable for analysis by this method. Samples containing suspended particulate should be

centrifuge d or filtered prior to removing a sample aliquot or diluting with solvent

. The water

sample is mixe d well prior to removing an aliquot or diluting, if necessary, with ASTM Type I

water, HPLC water, other suitable water, or solvent (methanol).

Quantitation is by stable isotope internal standard calibration in laboratory reagent water. All

perfluorinat ed compounds ( PFC s) target analyte concentrations of perfluorosulfonic acids

(PFSAs) and perfluorocarboxylic acids (PFCAs) are reported as anions and corrected for

their salt or free acid forms. Alternatively, quantitation may be performed by external

st andard calibration.

This is a performance

- based method. Method uncertainty for each target analyte is

determined for each analytical batch using multiple laboratory control spikes at multiple

concentrations. This method also requires that the precision and accuracy for each sample

be determined using field matrix spikes to verify that the method is applicable to each sample

matrix.

Calibration standards for PFUnA, PFDoA, PFTrDA, and FOSA have been found to be

un stable for more than 2 days in 100% water. Samples requiring analysis for these

compounds by this method should be diluted 1:1 with methanol and analyzed against a

calibration curve prepared in 1:1 synthetic groundwater:MeOH.



## 3 Definitions

3.1 Analysis Batch

A set of study samples that are prepared with calibration standards, laboratory control

samples, and procedural blanks , and analyzed on the same instrument during a time period

that begins and ends with the analysis of the appropriate continuing calibration check

standards.



## 3.2 Analytical Sample

A portion of a laboratory sample prepared for analysis.



## 3.3 Calibration Standard

A solution prepared by spiking a known volume of the Working Standard (WS) into a

predete rmined amount of ASTM Type I, HPLC grade water, or other suitable water (i.e.

matrix water), and analyzed according to this method. Calibration standards are used to

calibrate the instrument response with respect to analyte concentration.



## 3.4 Laboratory Duplicate Sample (LDS, or Lab Dup)

A laboratory duplicate sample is a separate aliquot of a sample taken in the analytical

laboratory that is analyzed separately with identical procedures. Analysis of LDSs compared

to that of the first aliquot give a measure of the precision associated with laboratory

procedures, but not with sample collection, preservation, or storage procedures.

### ETS -8- 044. 1 Page 4 of 22

Method of Analysis for the Determination of Perfluorinated Compounds in Wate r by LC/MS/MS;

Direct Injection Analysis 

## 3.5 Field Blank (FB)/Trip Blank (TB)

ASTM Type I, HPLC grade water, or other suitable water, placed in a sample container in the

laboratory and treated as a sample in all respects, including exposure to samp ling site

conditions, storage, preservation and all analytical procedures. The purpose of the TB is to

determine if test substances or other interferences are present in the field environment. This

sample is also referred to as a Trip Blank.



## 3.6 Field Duplicate Sample (FDS, Field Dup)

A sample collected in duplicate at the same time from the same location as the sample. The

FDS is handled under identical circumstances and treated exactly the same throughout field

and laboratory procedures. Analysis of the FDS compared to that of the first sample gives a

measure of the precision associated with sample collection, preservation and storage, as well

as with laboratory procedures.



## 3.7 Field Matrix Spike (FMS)

A sample to which known quantities of the target analyte s , ISs and SRSs are added to the

sample bottle in the laboratory before the bottles are sent to the field for collection of aqueous

samples. A known, specific volume of sample must be added to the sample container

without rinsing. This may be accomplished by making a “fill to this level” line on the outside of

the sample container. The FMS is analyzed to ascertain if any matrix effects, interferences,

or stability issues may complicate the interpretation of the sample analysis.



## 3.8 Trip Blank Matrix Spike ( T BMS )

An aliquot of ASTM Type I, HPLC grade water, or other suitable water, to which known

quantities of the target analytes , ISs and SRSs are added in the laboratory prior to the

shipment of the collection bottles. The TBMS is analyzed exactly like a study sample to help

determine if the method is in control and whether a loss of analyte or analytical bias could be

attributed to sample holding time, sample storage and/or shipment issues. A low and high

TBMS are appropriate when expected sample concentrations are not known or may vary.



## 3.9 Internal Standard (IS)

A compound added to each study sample, calibration standard, laboratory control samples,

and procedural blanks at a consistent level (typically around 1 ng/mL). T he internal

standard (s) are stable isotope labeled versions of the target analyte s . The area count ratio of

the target analyte to the internal standard is used for calibration. Surrogate ISs are applied

when stable isotope ISs of target analytes are unavailable. A surrogate IS is not necessar ily

a stable isotope labeled version of the target analyte, but is treated as an internal standard for

quantitation.



## 3.10 Laboratory Control Sample (LCS)

An aliquot of control matrix to which known quantities of the target analytes , ISs and SRSs

(when applicabl e) are added in the laboratory at the time when samples are aliquotted . At

least three levels (two levels for SRSs) in triplicate are included, one generally at the low end

of the calibration curve and one near the mid range and the upper end of the curve. The

LCSs are analyzed exactly like a laboratory sample to determine whether the stability of the

standards . LCSs should be prepared each day samples are aliquoted

.



## 3.11 Laboratory Matrix Spike (LMS)

A laboratory matrix spike is an aliquot of a sample to which known quantities of target

analytes , ISs and SRSs (when applicable) are added in the laboratory. The LMS is analyzed

exactly like a laboratory sample to determine whether the sample matrix contributes bias to

the analytical results. The endogenous concentrations of the analytes in the sample matrix

must be determined in a separate aliquot and the measured values in the LMS corrected for

these concentrations. LMSs are optional for analysis of aqueous samples.

### ETS -8- 044. 1 Page 5 of 22

Method of Analysis for the Determination of Perfluorinated Compounds in Wate r by LC/MS/MS;

Direct Injection Analysis 

## 3.12 Laboratory Sample

A portion or aliquot of a sample received from the field for testing.



## 3.13 Limit of Quantitation (LOQ)

The lower limit of quantitation (LLOQ) for an analytical batch is the lowest concentration that

can be reliably quantitated within the specified limits of precision and accuracy. The LLOQ is

generally selected as the lowest non

- zero standard in the calibration curve that meets method

acceptance criteria. The LLOQ for each target analyte is established for each analysis batch

as the lowest calibration standard with area counts at least twice that of the average area

counts of the procedural blanks.

The upper limit of quantitation (ULOQ) for an analytical batch is the highest concentration that

can be reliably quantitated within the specified limits of precision and accuracy. The highest

standard in the calibration curve that meets method acceptance criteria is defined as the

ULOQ.



## 3.14 Method /Procedural Blank

An aliquot of control matrix that is treated exactly like a laboratory sample including exposure

to all glassware, equipment, solvents, and reagents that are used with other laboratory

samples. The method blank is used to determine if test substances or other interferences are

present in the laboratory environment, the reagents, or the apparatus.



## 3.15 Sample

A sample is an aliquot removed from a larger quantity of material intended to represent the

original source material.



## 3.16 Stock Standard Solution (SSS)

A concentrated solution of a single

- analyte prepared in the laboratory with an assayed

reference compound.



## 3.17 Surrogate Internal Standard

An IS that is not necessarily a stable isotopically labeled target analyte, but is treated as an

internal standard for quantitation. Surrogate ISs are used when isotopically labeled

counter parts of the target analyte are not commercially or re adily available.



## 3.18 Surrogate Recovery Standard (SRS)

An isotopically labeled standard , not used as an internal standard, that is added to each

sample and appropriate QC sample as a means to evaluate the method performance for a

chemical class of compounds (e .g., PFSAs, PFCAs)

.



## 3.19 Working Standard (WS)

A solution of several analytes prepared in the laboratory from SSSs and diluted as needed to

prepare calibration standards and other required analyte solutions.



## 4 Warnings and Cautions

4.1 Health and Safety

The acute and chronic toxicity of the standards for this method have not been precisely

determined; however, each should be treated as a potential health hazard. The analyst

should wear gloves, a lab coat, and safety glasses to prevent exposure to chemicals that

might be present.

### ETS -8- 044. 1 Page 6 of 22

Method of Analysis for the Determination of Perfluorinated Compounds in Wate r by LC/MS/MS;

Direct Injection Analysis The laboratory is responsible for maintaining a safe work environment and a current

awareness of local regulations regarding the handling of the chemicals used in this method.

A reference file of material safety data sheets (MSDS) should be available to all personnel

involved in these analyses.



## 4.2 Cautions

The analyst must be familiar with the laboratory equipment and potential hazards including,

but not limited to, the use of solvents, pressurized gas and solvent lines, high voltage, and

vacuum systems. Refer to the appropriate equipment procedure or operator manual for

additional information and cautions.



## 5 Interferences

During sample preparation and analysis, major potential contaminant sources are reagents

and glassware. All materials used in the analyses shall be demonstrated to be free from

interferences under conditions of analysis by running method blanks.

Parts and supplies that contain Teflon® should be avoided or minimized due to the possibility

of interference and/or contamination. These may include, but are not limited to: wash bottles,

Teflon ® 

### lined caps, autovial caps, HPLC parts, etc.

The use of disposable micropipettes or pipettes to aliquot standard solutions is recommended

to make calibration standards and matrix spikes.



## 6 Instrumen tation, Supplies, and Materials

6.1 Instrumentation

Analytical balance capable of reading to 0.0001g

HPLC/MS/MS or HPLC/MS system, as described in Section 10

.



## 6.2 Supplies and Materials

Sample collection bottles

— HDPE (e.g., NalgeneTM) wide

- mouth bottles with screw cap.

Note: Do not use fluorinated or Teflon® bottles or lined caps.

Coolers or boxes for sample shipment.

15

- mL and 50

- mL disposable polypropylene centrifuge tubes.

Class A pipettes and volumetric flasks, various.

2 mL HPLC auto vial s

Disposable pipettes, polypropylene or glass as appropriate

Centrifuge capable of spinning 15

- mL and 50

- mL polypropylene tubes at 3000 rpm.



## 7 Reagents and Standards

Note: Suppliers and catalog numbers are for illustrative purposes only. Equivalent

performance may be ach ieved using chemicals obtained from other suppliers. Do not use a

lesser grade of chemical than those listed.



## 7.1 Chemicals

Water

– Milli

- Q, HPLC grade, or other suitably appropriate sources

Calcium Acetate

- A.C.S. Reagent Grade

### ETS -8- 044. 1 Page 7 of 22

Method of Analysis for the Determination of Perfluorinated Compounds in Wate r by LC/MS/MS;

Direct Injection Analysis Magnesium Acetate

- A.C.S. Re agent Grade

Methanol

– HPLC grade

Ammonium Acetate

– A.C.S. Reagent Grade



## 7.2 Representative Target Analytes, ISs, and SRSs

PFBA, Heptafluorobutyric Acid, (C 4 

### Perfluorinated Acid)

PFPeA , Nonafluoropentanoic Acid (C 5 

### Perfluorinated Acid)

PFHxA, Perfluorohexanoi c Acid (C 6 

### Perfluorinated Acid)

PFHpA, Tridecafluoroheptanoic Acid, (C 7 

### Perfluorinated Acid)

PFOA, Ammonium perfluorooctanoate, (C 8 

### Perfluorinated Acid)

PFNA, Heptadecafluorononanoic Acid, (C 9 

### Perfluorinated Acid)

PFDA, Nonadecafluorodecanoic Acid (C 10 

### Per fluorinated Acid)

PFUnA, Perfluoroundecanoic Acid, (C 11 

### Perfluorinated Acid)

PFDoA, Perfluorododecanoic Acid, (C 12 

### Perfluorinated Acid)

PFTrDA, Perfluorotridecanoic Acid, (C 13 

### Perfluorinated Acid)

FBSA, Perfluorobutanesulfonamide

FOSA, Perfluorooctanesulfo nylamide

PFBS, Potassium Perfluorobutane sulfonate

PFHS, Perfluorohexanesulfonate

PFOS, Potassium perfluorooctanesulfonate

PFOA [1,2, 3, 4

- 13 

### C], 13 

### C 4 

### - isotopically labeled perfluorooctanoic acid (SRS)

PFOS [1,2, 3, 4

- 13 

### C], 13 

### C 4 

### - isotopically labeled Perfluorooctanesulfonate (SRS)

PFUnA [1,2

- 13 

### C], 13 

### C 2 

### - isotopically labeled Perfluoroundecanoic acid (SRS)

A custom mix of ISs in a methanolic solution containing ([1,2,3,4

- 13 

### C 4 

### ]PFBA, [1,2

-

13 

### C 2 

### ]PFHxA, [1,2,3,4 ,5,6,7,8

- 13 

### C 8 

### ]PFOA, [1,2,3,4,5 ,6,7,8,9

- 13 

### C 9 

### ]PFN A, [1,2

- 13 

### C 2 

### ]PFDA,

[1,2 ,3,4,5,6,7

- 13 

### C 7 

### ]PFUnA, [1,2

- 13 

### C 2 

### ]PFDoA, [1,2 ,3

- 13 

### C 3 

### ]PFHS, [1,2,3,4 ,5,6,7,8

- 13 

### C 8 

### ]PFOS

, and [1,2,3,4,5,6,7,8

- 13 

### C 8 

### ]PFOSA (Wellington Laboratories, Guelph, ON) in combination with

added ([1,2,3,4 ,5

- 13 

### C 5 

### ]PFPe A

, ([1,2,3,4

- 13 

### C 4 

### ]PFHpA, and [ 18 

### O 2 

### ]PFBS can be used to prepare

a stock IS solution. Alternatively, individual stable isotope ISs can be used to prepare a stock

IS mixture.

Other ISs can be applied.



## 7.3 Reagent Preparation

2 mM A mmonium acetate solution (Analysis)

— Weigh 0.3 g of A mmonium acetate and

dissolve in 2.0 L of reagent water.

Synthetic Groundwater (containing 25 ppm Ca and Mg)

– Weigh 0.61 g of Calcium Acetate

and 0.92 g of Magnesium Acetate and dissolve in 6.0 L of reagent water.

Note: Alternative volumes may be prepared as long as the ratios of the solvent to solute ratios

are maintained.

### ETS -8- 044. 1 Page 8 of 22

Method of Analysis for the Determination of Perfluorinated Compounds in Wate r by LC/MS/MS;

Direct Injection Analysis 

## 7.4 Stock Standard Solution (SSS) and Working Standard Solution

Preparation

The following standard preparation procedure serves as an example. Weighed amounts and

final volumes may be changed to suit the needs of a particular study. For example, μL

volumes may be spiked into volumetric flasks when diluting stock solutions to appropriate

levels.

100 μg/mL target analyte SSSs

— Weigh out 10 mg of analytical standard **(corrected for**

**percen t salt**  **, acid [ETS -4-**  **031] and purity**  ) and dilute to 100 mL with methanol or other

suitable solvent, in a 100 mL volumetric flask. Transfer to a 125 mL LDPE bottle or other

suitable container. Prepare a separate solution for each analyte. Expiration dates and

storage conditions of stock solutions should be assigned in accordance with laboratory

standard operating procedure. An example of purity and salt correction is given below for

PFOS.



### salt of weight moclecular anion of weight molecular factor correction salt

=

9275.0

538 499 factor correction )salt (K PFOS

== +



### 10 mg C 8 

### F 17 

### S0 3 - 

### K + 

### with purity 90% = 8.35 mg C 8 

### F 17 

### S0 3 – 

### (10 mg*0.90*0.9275=8.35 mg)

10 μg/mL (10,000 ng/mL) mixed working standard

— Add 5.0 mL each of the 100 μg/mL

SSSs to a 50 mL volumetric flask and bring up to volume with solvent.

1 μg/mL (1,000 ng/mL) mixed working stan dard

— Add 0.5 mL of the 100 μg/mL SSSs to a

50 mL volumetric flask and bring up to volume with solvent.

0.1 μg/mL (100 ng/mL) mixed standard

— Add 0.05 mL of the 100 μg/mL SSSs to a 50 mL

volumetric flask and bring up to volume with solvent.

Storage Conditi ons

— Store all SSSs and working standards in accordance with laboratory

standard operating procedure or in a refrigerator at 4°±2°C for a maximum period of 6 months

from the date of preparation.



## 7.5 Calibration Standards

Calibration can be performed by IS or external calibration. Using the working standards

described above, prepare calibration solutions in ASTM Type I water, HPLC water, other

suitable water, or a mixture of solvent and water using the information in Table 2 as a

guideline. Note: Volumes of wa ter or water/solvent mixtures and working standards may be

adjusted to meet the data quality objectives addressed in the general project outline.

Calibration levels other than those listed below can be prepared as needed.

For the quantitation of PFOA and PFOS, reference materials of certified mixed linear and

branched isomer are preferred. Alternately, reference materials of primarily linear isomers of

PFOA and/or PFOS may be used, however, when quantitating with predominantly linear

reference standards, additional LCS samples containing both linear and branched isomers of

PFOA and PFOS are required 3



### .

7.5.1 Internal Standard (IS) and Surrogate Recovery Standard (SRS)

For IS calibration, stable isotope internal standards of each target analyte or appropriate

surrogate ISs should be spiked at the same level in all calibration standards. Once the

calibration standards have been prepared as stated above in Section 7.5, all calibration

standards are spiked with a separate internal standard spiking solution. Typically the

3 A report summarizing an assessment of the use of reference standards containing certified linear and branched isomers of

PFOA/PFOS can be found in 3M report E11

- 0560.

### ETS -8- 044. 1 Page 9 of 22

Method of Analysis for the Determination of Perfluorinated Compounds in Wate r by LC/MS/MS;

Direct Injection Analysis concentration of the internal standard is consistent with the internal standard concentration

expected in the samples being prepared, usually 1 ng/mL. The concentration of the internal

standard spiking solution is typically 2 μg/ mL. A separate zero point or method blank is

typically prepared at the same time as the calibration standards, using the same solution

used to prepare the standards (ASTM Type I water, HPLC water, other suitable water, or a

solvent/water mixture), and is spiked with the internal standard at the same concentration as

the calibration curve, typically at 1 ng/mL.

If the sample s being analzyed w ere pre

- spiked with SRSs , the calibration curve prepared in

Section 7.5 is spiked with a separate SRS spiking solution. Typically, the sample bottles are

spiked with a SRS at 0.1 ng/mL. The final calibration curve must consist of at least six

calibration points after analysis. The following table provides an example of spike

concentrations and volumes used to achieve a multi

- point extracted calibration curve with

internal standard and surrogate standard.

Table 1 lists recommended stable isotope internal standards for several PFSA and PFCA

target compounds. A custom mix of isotopically labeled target analytes in a methanolic

solution containing ([1,2,3,4

- 13 

### C 4 

### ]PFBA, [1,2

- 13 

### C 2 

### ]PFHxA, [1,2,3,4,5,6,7,8

- 13 

### C 8 

### ]PFOA,

[1,2,3,4,5,6,7,8,9

- 13 

### C 9 

### ]PFNA, [1,2,3,4,5,6

- 13 

### C 6 

### ]PFDA, [1,2,3,4,5,6,7

- 13 

### C 7 

### ]PFUnA, [1,2

-

13 

### C 2 

### ]PFDoA, [ 1,2,3

- 13 

### C 3 

### ]PFHS, [1,2,3,4,5,6,7,8

- 13 

### C 8 

### ]PFOS, and [1,2,3,4,5,6,7,8

- 13 

### C 8 

### ]FOSA

(Wellington Laboratories, Guelph, ON) in combination with added ([1,2,3,4 ,5

- 13 

### C 5 

### ]PFPe A

, ([1,2,3,4

- 13 

### C 4 

### ]PFHp A , and [ 18 

### O 2 

### ]PFBS can be used to prepare a stock IS solution.

Alternative sources of certified stable isotope labeled target analytes are applicable.

Alternatively, individual stable isotope ISs can be used to prepare a stock IS mixture. The

table below lists the recommended stable isotope ISs and SRSs applied in the method.

Other stable isotope ISs and SRSs of target analytes not listed in the table may be used if

supported by validation and/or analysis batch QCs meeting method acceptance criteria (e.g.,

[ 13 

### C 2 

### ]- PFOA) . The same internal standard should be used for a given analyte throughout the

entire project/study. Note: some of the compounds listed below are appropriate to use as

surrogate ISs when a stable isotope IS of a target analyte is not available. Generally,

surrogate isotopically labeled PFCAs are used for PFCAs, and surrogate i sotopically labeled

PFSA s are used for PFSAs.

Table 2 provides examples of spike concentrations and volumes used to achieve a multi

- point

calibration curve with ISs and SRSs

.

### ETS -8- 044. 1 Page 10 of 22

Method of Analysis for the Determination of Perfluorinated Compounds in Wate r by LC/MS/MS;

Direct Injection Analysis Table 1 . Stable Isotope PFCAs and PFSAs used for ISs and SRSs

Compound Name Synonym or Acronym Analytical Purpose Reference Standard

Source

13 C 4 - Perfluorobutanoic acid [1,2,3,4

- 13 C 4 ]PFBA IS for PFBA Wellington Labs

(Mix or Individual)

13 C 4 - Perfluoro pentanoic acid [1,2,3,4 ,5

- 13 C 5 ]PFPe A IS for PFPeA Wellington Labs

(Mix or Individual)

13 C 2 - Perfluorohexanoic acid [1,2

- 13 C 2 ]PFHxA IS for PFHxA Wellington Labs

(Mix or Individual)

13 C 4 - Perfluoro hept anoic acid [1,2,3,4

- 13 C 4 ]PFHp A IS for PF HpA Wellington Labs

(Mix or Individual)

13 C 8 - Perfluorooctanoic acid [1,2,3,4,5,6,7,8

- 13 C 8 ]PFOA IS for PFOA and [1,2,3,4

13 C 4 ]PFOA Wellington Labs

(Mix or Individual)

13 C 9 - Perfluorononanoic acid [1,2,3,4,5,6,7,8,9

- 13 C 9 ]PFNA IS for PFNA Wellington Labs

(Mix or Individual)

13 C 6 - Perfluorodecanoic acid [1,2,3,4,5,6

- 13 C 6 ]PFDA IS for PFDA Wellington Labs

(Mix or Individual)

13 C 7 - Perfluoroundecanoic acid [1,2,3,4,5,6,7

- 13 C 7 ]PFUnA IS for PFUnA Wellington Labs

(Mix or Individual)

13 C 2 - Perfluorododecanoic acid [1,2

- 13 C 2 ]PFDoA IS for PFDoA, *PFTA Wellington Labs

(Mix or Individual)

18 O 2 - Ammonium Perfluorobutane sulfonate [ 18 O 2 ]PFBS IS for PFBS RTI International

(Individual)

13 C 3 - Ammonium Perfluorohexane sulfonate [ 1,2,3

- 13 C 3 ]PFHS IS for PFHS Wellington Labs

(Mix or Individual)

13 C 8 - Sodium Perfluorooctane sulfonate [1,2,3,4,5,6,7,8

- 13 C 8 ]PFOS IS for PFOS and

PFOS[1,2,3,4 13 C 4 ], Wellington Labs

(Mix or Individual)

13 C 8 - Perfluorooctanesulfonamide [1,2,3,4,5,6,7,8

- 13 C 8 ]FOSA IS for FOSA Wellington Labs (mix)

RTI International

(Individual)

13 C 4 - Perfluorooctanoic acid [1,2,3,4

- 13 C 4 ]PFOA SRS for all PFCAs : C4

- C8 Wellington

13 C 2 - Perfluoroundecanoic acid [1,2

- 13 C 2 ]PFUnA SRS for all PFCAs C9

- C13 Wellington

13 C 8 - Perfluorooctane sulfonate [1,2,3,4

- 13 C 4 ]PFOS SRS for all PFSA s: C4,

C6, and C8 Wellington

### ETS -8- 044. 1 Page 11 of 22

Method of Analysis for the Determination of Perfluorinated Compounds in Water by LC/MS/MS; Direct Injection Analysis Table 2 . Example Preparation of Calibration Curve with ISs and SRSs

**Sample Description Concentration** 

**of WS, μ**  **g/mL Volume of** 

**WS,** μ **L Volume of IS** 

**(2 μ**  **g/mL),** μ **L Concentration of** 

**Surrogate, μ**  **g/mL Volume of** 

**Surrogate,** μ **L Volume of ASTM Type I**  **Water, or**

**other suitable solvent**  **(1) , mL** 

0.025 ng/mL curve point 0.10 25 50 0.20 12.5 100

0.030 ng/mL curve point 0.10 30 50 0.20 15 100

0.04 ng/mL curve point 0.10 40 50 0.20 20 100

0.05 ng/mL curve point 0.10 50 50 0.20 25 100

0.1 ng/mL curve point 0.10 100 50 0.20 50 100

0.25 ng/mL curve point 0.10 250 50 0.20 125 100

0.5 ng/mL curve point 1.0 50 50 0.20 250 100

1 ng/mL curve point 1.0 100 50 0.20 500 100

2.5 ng/mL curve point 10.0 25 50 10.0 25 100

5.0 ng/mL curve point 10.0 50 50 10.0 50 100

10.0 ng/mL curve point 10.0 100 50 10.0 100 100

25.0 ng/mL curve point 10.0 250 50 10.0 NA 100

50.0 ng/mL curve point 10.0 500 50 10.0 NA 100

75.0 ng/mL curve point 10.0 750 50 10.0 NA 100

100 ng/mL curve point 10.0 1000 50 10.0 NA 100

N/A

- Not Applicable

(1) Samples requiring analysis for PFUnA, PFDoA, PFTrDA, and FOSA should be analyzed against a calibration curve prepared in 1:1 synthetic groundwa ter:MeOH.

### ETS -8- 044. 1 Page 12 of 22

Method of Analysis for the Determination of Perfluorinated Compounds in Wate r by LC/MS/MS; Direct Injection

Analysis 

## 8 Sample Collection and Bottle Preparation

Sample collection bottles are prepared by 3M Environmental Laboratory (or subcontract supplier) personnel for

shipment at ambient temperature to the collection site. Typically, four separate collection bottles are

associated with a single collection site: sample, field duplicate sample, low field matrix spike, and high field

matrix spike. Alternatively, the sample and field duplicate sample may contain SRSs in lieu of additional target

analyte low field matrix spike and target analyte high field matrix spike samples. Depending on the scope of

the project, additional replicates of the field sample and field matrix spikes may be added. Also, it is not

uncommon for additional mid

- level field matrix spikes to be collected if the expected sample concentrations are

truly unknown or could span a large concentration range.

High

- density polyethylene (HDPE) wide

- mouth Nalgene bottles are used for the sample collection containers.

(Volumes of the bottles may vary depending on how much sample is required to meet data quality objectives.)

Sample collection volumes are project specific and based on data quality objectives. The Nalgene bottles do

not require any pretreatment prior to use. Typically, placement of a sample bottle volumetric “fill to here” line is

done by using a sample bottle marker template. Alternatively, bottles may be weighed prior to bottle

preparation and weighed again after samples have been collected.

All bottles should be clearly labeled to indicate its intended use as a sample, field sample duplicate, low field

matrix spike, high field matrix spike, sample/SRS field matrix spike, field duplicate sample/SRS field matrix

spike, trip blank, or trip blank matrix spike. If each location has different designated spike levels, the label

should also clearly indicate the sample location designation. Generally, a set of bottles for a given collection

site are prepared then grouped together in plastic bags for organizational purposes. For each sample

collection event, at least one set of trip blank and trip blank matrix spikes are prepared.

Bottle preparation should be documented in a Note to File or on a sample preparation worksheet and should

include the following information: date prepared, total number of bottles prepared, number of sample sites, the

standard identification numbers and spike volumes used to prepare spiked bottles, the “fill to here” volume, and

any other pertinent information needed for reconstructibility of the data. The Note to File will be included in the

final data package for the project.

Samples are collected in the field and shipped to the laboratory at ambient temperature.



## 8.1 Field Matrix Spike Sample (FMS)

Field matrix spike samples are a requirement of the method. A FMS sample is defined as a QC sample to

which known quantities of appropriate target analytes are added to the sample bottle in the field or in the

laboratory before the bottles are sent to the field. The sample and field duplicate sample may contain

appropriate SRSs in lieu of target analyte FMS samples. Sample quantities are determined vol umetrically or

gravimetrically. A known, specific volume or weight of sample is added to the sample container without

rinsing. Volumetric sample measurements may be acquired by a laboratory applied “fill to this level” line on the

outside of the sample container. Target analyte FMS samples should be spiked at approximately 0.5

- 10 times

the expected analyte concentration in the sample. If the expected range of analyte concentrations is unknown,

multiple spikes at varying levels may be prepared to increase the likelihood that a spike at an appropriate level

is made. Typically a low and a high target analyte spike are prepared for each sampling location. In those

instances where SRSs are to be used in lieu of target analyte FMS samples, the sample and field duplicate

sample are spiked at approximately 2

- 5 times the target LOQ. The FMS is analyzed to ascertain if matrix

effects or sample holding time contributes bias to the analytical results. For the sample bottles designated for

matrix spikes, an appropriate volume of matrix spiking solution is added to the empty bottle prior to sampling.

The volume of spike solution added should produce the desired final concentration of target analytes once the

bottle is filled with sample to the “fill to here line”. The matrix spiking solution(s) should be prepared in a

suitable solvent and contain all of the appropriate target analytes, ISs, and SRSs. The target analyte matrix

spiking solution is often the same as the working standards used to create the calibration standards. An

example of a bottle spike is given below.

“Fill to here” volume = 200 mL (A 250 mL Nalgene bottle is used)

Desired Field Spike Concentration = 0.25 ng/mL

### ETS -8- 044. 1 Page 13 of 22

Method of Analysis for the Determination of Perfluorinated Compounds in Wate r by LC/MS/MS; Direct Injection

Analysis 500 μ L of a 0.1 μ g/mL spiking solution (containing the target analytes) is added to the bottle and the bottle cap

promptly sealed.



## 8.2 Internal Standard and Surrogate Recovery Standard

If analysis of a surrogate recovery standard (SRS) is included in the project objectives, an appropriate volume

of a surrogate standard solution is added to all the bottles prior to sampling and SPE. Typically sample bottles

are spiked with surrogate recovery standards at a final desired spike concentration of 0.1 ng/mL.

If quantitation by internal standard (IS) is included in the project objective, an appropriate volume of internal

standard solution is added to all the bottles prior to sampling and SPE . Typically sample bottles are spiked

with internal standard at a final desired spike concentration of 1 ng/mL.

For the trip blank, the SRS spike and IS spike i s added to the bottle and then ASTM Type I water (HPLC grade

reagent water or other suitable water may used) is added to the “fill to here” line. The bottle is capped and

sealing tape may be placed around the outer edge of the cap. Trip blank matrix spikes are prepared by adding

the appropriate volume of target analyte spiking solution, IS, and SRS spiking solutions and filling the bottle to

the desired volume with the appropriate water and capping and sealing the cap.



## 9 Quality Control and Data Quality Objectives

9.1 Data Quality Objectives

This method and required quality control samples is designed to generate data accurate to ±30% with a

targeted LOQ of 0.025 ng/mL. Any deviations from the quality control measures spelled out below will be

documented in the raw data and footnoted in the final report.



## 9.2 Method/Procedural Blanks

The method/procedural blank is zero point calibration standard (which includes ISs) analyzed in a regular basis

with each analysis batch. At a minimum, method blanks are analyzed prior to instrument calibration, prior to

the analysis of CCV samples, after every 10 sample injections, and at the end of the analytical run.

The mean area count or area ratios when using internal standard calibration, for each analyte in the method

blanks m ust be less than 50% of the area count counts or area ratios when using internal standard calibration,

of the LOQ standard. The standard deviation of the area counts, or area ratios when using internal standard

calibration, of these method blanks should be calculated. A specific %RSD acceptance criteria is not specified

but is assessed on an analytical batch basis. If the mean area counts or area ratios when using internal

standard calibration, of the method blanks exceed 50% of the LOQ standard, then the LOQ must be raised to

the first standard level in the curve that meets criteria. Method blanks may be eliminated if technical

justification can be provided (e.g. the procedural blank was analyzed after an unexpectedly high level sample).

If any procedural blanks are removed from the LOQ determination, document in the raw data and report as

appropriate. Laboratory Sample Replicates / Field Duplicate Sample

Typically, samples are collected in duplicates in the field. The relative percent difference (RPD) of duplicate

samples should be ≤20% for the precision of sample preparation and analysis to be considered in control.

Replicate samples not meeting the ≤20% RPD criteria are flagged and reported as outside of QC acceptance

criteria.



## 9.3 Laboratory Matrix S pikes (LMSs)

LMSs may be performed in lieu of FMSs if FMSs have previously been performed for the sample matrix.

Additionally, LMSs may be performed in lieu of FMSs for a sample matrix if the FMS levels were not

appropriate for determining spike recoveries relative to endogenous levels of target analytes and appropriate

SRSs. Generally, each sample location represents a different sample and sample matrix. LMSs are prepared

for each sample and analyzed to determine the matrix effect on spike recovery efficiency of each target analyte

and appropriate SRSs. LMSs should be prepared at a minimum of one level and in duplicate. LMS

concentrations should be prepared at approximately 0.5

- 10 times the endogenous concentration or

approximately 4

- 10 times the LOQ concentration of each target analyte.

### ETS -8- 044. 1 Page 14 of 22

Method of Analysis for the Determination of Perfluorinated Compounds in Wate r by LC/MS/MS; Direct Injection

Analysis Lab matrix spike recoveries should fall within ± 30% of expected values. Sample data with LMS recovery

outside of ±30% but within ±50% of the expected value are flagged and reported as outside of QC acceptance

criter ia. Data with LMS recovery outside of ±50% of the expected value are reported as NR, where NR is

defined as “Not Reportable” data outside of QC acceptance criteria.



## 9.4 Lab Control Sample

Lab control spikes are prepared for each analysis batch to determine method accuracy and precision. LCSs

should be prepared at three levels in triplicate for each target analyte and at a minimum of two levels in

triplicate for appropriate SRSs. Low lab control spikes should be prepared at a concentration in the range of

a pproximately four to ten times higher than the targeted lower LOQ, the mid lab control spikes should be

prepared at a concentration near the mid

- point of the calibration curve and the high lab control spikes at

approximately 80% of the upper LOQ. For each target analyte and SRSs, the percent relative standard

deviation (method precision) for each control spike level must be less than or equal to 20% and the average

recovery (method accuracy) for each control spike level must be 80

- 120%. Sample data for target analytes

outside of the laboratory control spike acceptance criteria will be handled as follows:

If the average recovery of a spiking level falls outside method acceptance, but at least 67% (6 out of 9 ) o f LCS

samples are within 20 % of their respective nominal value (33% of the QC samples, not all replicates at the

same concentration, may be outside 20% of nominal value), the average recovery will be flagged as outside

method acceptance criteria. All LCS samples will be control charted as per ETS -4- 02 6. If the average

recovery of one of the spiking levels exceeded the analytical method uncertainty as determined by ETS

- 12

- 012, that analytical batch uncertainty will be expanded for that particular study.

If more than 67% of the LCS samples fail to meet method acceptance criteria, the data will not be reported.

Calibration standards consisting of mixed branched and linear isomer PFOS/PFOA are preferred. However,

for PFOS/PFOA target analytes, if the calibration standards are comprised of predominantly linear isomers

only, at least one level of triplicate LCSs should be prepared using PFOS/PFOA which contains a mix of linear

and branched isomers. These LCSs will be used to demonstrate quantitative equivalency (or quantitative bias)

of the isomeric mix when using a predominantly linear standard for calibration. The mixed linear and branched

isomer PFOS/PFOA LCSs recoveries should fall within ± 30% of expected values. Alternatively, in lieu of

mixed branched and linear isomer PFOS/PFOA LCSs, mixed branched and linear isomer PFOS/PFOA

TBMSs may be applied to demonstrate method accuracy and precision.



## 9.5 Field Matrix Spikes (FMSs) / Surrogate Recovery Standards (SRSs)

FMSs are prepared for each sampling location and analyzed to determine the matrix effect and sample holding

time on the spike recovery of each target analyte and/or appropriate SRS. Generally, each sample location

represents a different sample and sample matrix.

FMSs are QC samples to which known quantities of appropriate target analytes are added to the sample bottle

in the laboratory before the bottles are sent to the field. Typically a low and a high target analyte FMS are

prepared for each sampling location. The sample and field duplicate sample may contain appropriate SRSs in

lieu of target analyte low field matrix spike and target analyte high field matrix spike samples.

Field matrix spike method acceptance criteria are recoveries within ±30% of the expected value. If FMS

recovery (target analyte or SRS spike) is outside of ±30% of the expected value or could not be assessed

because the FMS (target analyte) was spiked at an inappropriate level, the sample result is reported as follows:

1.) If target analyte FMS recovery could not be assessed because the FMS's were at an inappropriate level,

then Laboratory Matrix Spikes (LMS) may be substituted. If LMS recoveries are within ±30% the data are

reportable and flagged to indicate that the FMS spikes levels were inappropriate.

2.) If multiple target analyte FMS's were prepared on a sample and the closest FMS level to the reported

sample meets the ±30% acceptance criteria but additional FMS's are outside the ±30% acceptance range, the

data are reportable and flagged to indicate that while there were failing FMS’s, the uncertainty will not be

expanded since the most appropriate spike level passed.

### ETS -8- 044. 1 Page 15 of 22

Method of Analysis for the Determination of Perfluorinated Compounds in Wate r by LC/MS/MS; Direct Injection

Analysis 3.) If the target analyte FMS recoveries are outside of the ±30% acceptance range but at least 30 acceptable

historical reportable FMS sample results are available, the data may be reported but flagged with an expanded

uncertainty and as not meeting FMS criteria.

4.) Sample data with FMS recovery outside of ±30% but within ±50% of the expected value are flagged and

reported as outside of QC acceptance criteria with an expanded uncertainty.

5.) If FMS recovery is outside of ±50%, the sample result is reported as NR, where NR is defined as “Not

Reportable” due to noncompliant QC results.

The targeted fortification levels should be at least 50% of the endogenous level and less than 10 times the

e ndogenous level to be used without justification to determine the statement of accuracy for analytical results.

Note: It is possible for bottles utilized for Field Matrix Spike samples to be under

- filled or over

- filled during

sample collection. Since this scenario will effect the actual concentration of the FMS sample (surrogate and

internal standard concentrations will also be effected, if used), it is important that any obvious under

- filling or

over

- filling of sample bottles be documented in the data package and taken into account in the FMS , ISs, or

SRSs recovery calculations. Samples over

- filled or under

- filled by more than 10% will be require recalculation

of the FMS, ISs, and SRS true values.

The average of the sample and the field duplicate should be used to calculate the recovery.



## 10 Procedures

10.1 Water Sample Preparation

This method is applicable to water samples. Samples containing heavy particulate may not be suitable for

analysis by this method. Samples containing suspended particulate should be centrifuge prior to removing a

sample aliquot, or filtered.

• Thoroughly mix sample before removing a n aliquot and placing in a labeled autovial.

• Dilute sample, if necessary, with ASTM Type I water , HPLC water, other suitable water , or solvent

(methanol)

.

• L ab control spikes are prepared for each analysis batch to determine method accuracy and precision.

LCSs should be prepared at three levels in triplicate for each target analyte and at a minimum of two

levels in triplicate for appropriate SRSs. Low lab control spikes should be prepared at a concentration

in the range of approximately four to ten times higher than the targeted lower LOQ, the mid lab control

spikes should be prepared at a concentration near the mid

- point of the calibration curve and the high

lab control spikes at approximately 80% of the upper LOQ. For IS quantitation, stable isotope internal

standards of each target analyte or appropriate surrogate ISs should be spiked at the same level as the

samples being analyzed, in all LCSs

.

• If LCSs are being prepared us ing synthetic groundwater, allow the LCSs samples to equilibrate for a

minimum of 4 hours before aliquoting for analysis or diluting with solvent (methanol).



## 11 Sample Analysis

- LC/MS/MS

11.1 Instrument Setup

Note: In this example, an Applied Biosystems Sciex API 4000 (API 5000 or API 5500) Tandem Mass

Spectrometer (LC/MS/MS) is used. Other brands/models of LC/MS/MS instruments as well as single

quadrupole mass spectrometers (LC/MS) may be used as long as the method acceptance criteria are met.

Brand names, suppliers, part numbers, and models are for illustrative purposes only. Equivalent performance

may be achieved using apparatus and materials other than those specified here, but demonstration of

equivalent performance that meets the requirements of this method is the responsibility of the laboratory. The

operator must optimize and document the equipment and settings used.

### ETS -8- 044. 1 Page 16 of 22

Method of Analysis for the Determination of Perfluorinated Compounds in Wate r by LC/MS/MS; Direct Injection

Analysis Establish the LC/MS/MS system and operating conditions equivalent to the following:

Mass Spec: Applied Biosystems API 4000, API 5000, or API 5500

Ion Source: Turbo Ion Spray (ABS)

Mode: Electrospray Negative

Scan Type: MRM (Multiple Reaction Monitoring)

Computer: Dell DHM

Software: Windows 2000 or Windows XP, Analyst 1.4.2 or higher versi ons

HPLC: Agilent Series 1100,1200, or 1290

Agilent Quaternary Pump

Agilent Vacuum Degasser

Agilent Autosampler

Agilent Column Oven

Note: One or more C18 HPLC analytical columns (2.1 mm x 100 mm, 5 μ m or 2.1 mm x 50 mm, 5 μ m) may be

attached on

- line after the purge valve and before the sample injection port to retard and separate any residue

contaminants that may be in the mobile phase and/or HPLC system.

HPLC Column: Betasil C18, 4.6mm x 100mm, 5 μ m (ThermoElectron Corporation)

Column Temperature: 35 ° C

Inje ction Volume: 5μL

Mobile Phase (A): 2mM Ammonium Acetate in ASTM Type I water (See 7.3)

Mobile Phase (B): Methanol

Table 3

. Liquid Chromatography Gradient Program

.

**Step**

**Number Total Time** 

**(min) Flow Rate** 

**(** μ

**L/min) Percent A** 

**(2 mM ammonium** 

**acetate) Percent B** 

**(Methanol)**

0 0 750 97.0 3.0

1 2.0 750 97.0 3.0

2 14.5 750 5.0 95.0

3 15.5 750 5.0 95.0

4 16.5 750 97.0 3.0

5 20.0 750 97.0 3.0



### Note: Other HPLC gradients may be used as long as the method criteria and project data quality objectives are

met.

It may be necessary to adjust the HPLC gradient in order to optimize instrument performance. Columns with

different dimensions (e.g. 2.1mm x 30mm) and columns from different manufacturers (Keystone Betasil C18

etc.) may be used.

### ETS -8- 044. 1 Page 17 of 22

Method of Analysis for the Determination of Perfluorinated Compounds in Wate r by LC/MS/MS; Direct Injection

Analysis Table 4 Suggested MRM Transitions for Target Analytes, Surrogates, and Internal Standards

Analyte Analyte Description Mass Transition

Q1 (amu) Mass Transition

Q3 (amu)

PFBA (C4 Acid) Target 213 169

PFPeA (C5 Acid) Target 263 219

PFHxA (C6 Acid) Target 313 269, 119

PFHpA (C7 Acid) Target 363 319, 169

PFOA (C8 Acid) Target 413 369, 219, 169

PFNA (C9 Acid) Target 463 419, 169, 219

PFDA (C10 Acid) Target 513 469, 269, 219

PFUnA (C11 Acid) Target 563 519, 269, 219

PFDoA (C12 Acid) Target 613 569, 169, 319

PFTA (C13 Acid) Target 663 619, 369, 319

FBSA (C4 Sulfonamide) Target 298 78

FOSA (C8 Sulfonamide) Target 498 78

PFBS (C4 Sulfonate) Target 299 99, 80

PFHS (C6 Sulfonate) Target 399 99, 80

PFOS (C8 Sulfonate) Target 499 80, 99, 130

[1,2,3,4

- 13 C 4 ]PFBA IS for PFBA 217 172

[1,2 ,3,4,5

- 13 C 5 ]PFPe A IS for PFPeA 268 223

[1,2

- 13 C 2 ]PFHxA IS for PFHxA 315 270

[1,2,3,4

- 13 C 4 ]PFHpA IS for PFHpA 367 322

[1,2,3,4,5,6,7,8

- 13 C 8 ]PFOA IS for PFOA 421 376

[1,2,3,4,5,6,7,8,9

- 13 C 9 ]PFNA IS for PFNA 472 427

[1,2,3,4,5,6

- 13 C 6 ]PFDA IS for PFDA 519 474

[1,2,3,4,5,6,7

- 13 C 7 ]PFUnA IS for PFUnA 570 525

[1,2

- 13 C 2 ]PFDoA IS for PFDoA and PFTA 615 570

[ 18 O 2 ]PFBS IS for PFBS 303 84

[ 1,2,3

- 13 C 3 ]PFHS IS for PFHS 402 80

[1,2,3,4

- 13 C 4 ]PFOS IS for PFOS 503 80

[1,2,3,4,5,6,7,8

- 13 C 8 ]FOSA IS for FOSA 507 80

[1,2,3,4

- 13 C 4 ]PFOA Surrogate (C4

- C8 Acids) 417 372

[1,2,3,4

- 13 C 4 ]PFOS Surrogate(Sulfonates, FOSA) 503 80

[1,2

- 13 C 2 ]PFUnA Surrogate (C9

- C13 Acids) 565 520



### Multiple transitions for monitoring the analytes is an option. The use of one daughter ion is acceptable if data

sensitivity and selectivity is achieved and provided that retention time criteria are met to assure adequate

specificity. While the daughter ions may be chosen at the discretion of the analyst, mass transition 99 is

suggested for PFOS. Quantitation may be performed using the total ion chromatogram (TIC, or summed

MRMs) for a given analyte. For example, the PFOA TIC would sum all three of the monitored transitions. Use

of the suggested primary ion is recommended. Retention times may vary slightly, on a day

- to

- day basis,

depending on the batch of mobile phase and the gradient, column, guard column(s) used etc. Drift in retention

times is acce ptable within an analytical run, as long as the drift continues through the entire analysis and the

standards are interspersed throughout the analytical run.



## 11.2 Calibration Curve

Quantitation is by internal standard or external standard calibration. Calibration standards may be prepared in

ASTM Type I, HPLC water, other suitable water, or a solvent/water mixture. If internal standard calibration

does not meet calibration acceptance criteria, external calibration can be applied. See Table 1 for

### ETS -8- 044. 1 Page 18 of 22

Method of Analysis for the Determination of Perfluorinated Compounds in Wate r by LC/MS/MS; Direct Injection

Analysis recom mended application of available internal standards. Quantitation of PFOA and PFOS is by summed

analyte

- specific mass transitions.

Analyze the standard curve prior to each set of samples. If internal standards were added to the calibration

standards area ratios are used to generate the calibration curve. The standard curve may be plotted using a

linear regression (y = mx + b), weighted 1/x or unweighted, or by quadratic fi t (y = ax 2 

### + bx + c), weighted 1/x or

unweighted

, using suitable software

. The mathematical method used to calculate the calibration curve should

be applied consistently throughout a study. Any change should be thoroughly documented in the raw data.

High and/or low points may be excluded from the calibration curves to provide a better fit over the range

appropriate to the data or because they did not meet the pre

- determined acceptance criteria. Low

- level curve

points should also be excluded if their area counts (or area ratio if quantitating by IS) are not at least twice that

of the ave rage area counts (or area ratio if quantitating by IS) of method and/or solvent blanks. The coefficient

of determination (r 2 

### ) value for the calibration curve must be greater than or equal to 0.990 (or a correlation

coefficient (r) of 0.995). Each point in the curve must be within ± 25% of the theoretical concentration with the

exception of the LLOQ, which may be within ± 30%. Justification for exclusion of calibration curve points will be

noted in the raw data. A minimum of 6 points will be used to construct the calibration curve.

If the calibration curve does not meet acceptance criteria, perform routine maintenance or prepare a new

standard curve (if necessary) and reanalyze.



## 11.3 Continuing Calibration Verification (CCV)

Continuing calibration verifications (CCV) are analyzed to verify the accuracy of the calibration curve. Analyze

a mid

- range calibration standard, one of the same standards used to construct the calibration curve, at a

minimum after every tenth sample, not including solvent blanks, with a minimum of one per sample set.

Calibration verification injections must be within ± 25% to be considered acceptable. The calibration curve and

the last passing CCV will then bracket acceptable samples. Multiple CCV levels may be used. Samples must

be bracketed by passing CCVs or the calibration curve and a passing CCV to be reportable.



## 11.4 System Suitability

A minimum of three system suitability samples should be injected at the beginning of each analytical run, prior

to th e analysis of the calibration curve. Typically these samples are at a concentration near the mid

- level of the

calibration curve and are repeated injections from one autosampler vial. It is suggested that the system

suitability injections have area counts or area ratios when using internal standard calibration, with a target RSD

of ≤5% and a target retention time RSD of ≤2%. There is no defined acceptability limit on these results as the

%RSD value is dependent on the number of MRM transitions being monitored in the LC/MS/MS run or time

period. Ultimately, any effects on these parameters for the System Suitability samples will also be evident on

all standards and QC samples analyzed as part of the analysis batch. Any effect of system suitability is

incorp orated within QC acceptance criteria. 4



## 11.5 Sample Analysis and QCs

For each analysis batch, the instrument analysis run sequence should include an initial calibration curve,

samples, FDSs, interspersed blanks, interspersed CCVs, appropriate QCs (i.e., LCSs, LMSs, FMSs, TBMSs,

and TBs), and a final CCV or calibration curve bracketing samples and appropriate QCs

Inject the same volume (between 5

- 100μL) of each standard, analytical sample and blank into the instrument

(unless an on

- instrument sample dilution is desired).

Samples containing analytes that are quantitated above the concentration of the highest standard in the curve

should be further diluted and reanalyzed.

4 3M Environmental Laboratory study E08

- 0096 evaluated the effect on these results as a function of the number of MRMs being monitored.

### ETS -8- 044. 1 Page 19 of 22

Method of Analysis for the Determination of Perfluorinated Compounds in Wate r by LC/MS/MS; Direct Injection

Analysis 

## 12 Data Analysis and Calculations

The chromatography analysis software will typically calculate the amount of target analyte in the sample

extracts using the established calibration curve.

Calculate the percent recovery of the LCS using the following equation:



### 100%*

)

mL ng (ion Concentrat Spike )

mL ng (ion Concentrat LCS

recovery LCS%

=

Calculate the percent recovery of the LMS using the following equation:

100%*

)

mL ng ( ion Concentrat Spike )

mL ng ( Sample of ion Concentrat -)

mL ng ( ion Concentrat LMS

recovery % LMS

=



### For samples fortified with known amounts of analyte prior to extraction, use the following equation to calculate

the percent recovery.



### 100 (ng/mL) added Analyte (ng/mL) sample in found analyte Average- (ng/mL) found analyte Total Recovery × =



## 13 Analysis Batch Method Performance Criteria

Any method performance parameters that are not achieved must be considered in the evaluation of the data.

Nonconformance to any specified parameters must be described and discussed in the final report if the

Technical Manager (non

- GLP study) or Study Director (GLP study) chooses to report the data.

If criteria listed in this method performance section are not met, maintenance may be performed on the system

and samples reanalyzed, or other actions taken as appropriate. Document all actions in the raw data.

If data are to be reported when performance criteria have not been met, the data must be footnoted on tables

and discussed in the text of the report.



## 13.1 System Suitability

– Analysis Batch

A minimum of three system suitability samples should be injected at the beginning of each analytical run.

These samples are run prior to the calibration curve. It is suggested that the system suitability injections have

area counts with a target RSD of ≤5% and a target retention time RSD of ≤2%. There is no defined

acceptability limit on these results as the %RSDs are dependent on the number of MRM transitions being

monitored in the LC/MS/MS run or time period. Any effect of system suitability is incorporated in the QC

acceptance criteria.



## 13.2 Calibration and Limit of Quantitation (LOQ)

– Analysis Batch

Calibration Curve: The coefficient of determination (r 2 

### ) value for the calibration curve must be greater than or

equal to 0 .990 corresponding to a correlation coefficient (r) = 0.995. Each point in the curve must be within

± 25% of the theoretical concentration with the exception of the LLOQ, which may be within ± 30%.

CCV Performance: The calibration standards that are interspersed throughout the analytical sequence are

evaluated as continuing calibration verifications in addition to being part of the calibration curve. The accuracy

### ETS -8- 044. 1 Page 20 of 22

Method of Analysis for the Determination of Perfluorinated Compounds in Wate r by LC/MS/MS; Direct Injection

Analysis of each curve point must be within 25% of the theoretical value ( within 30% for lowest curve point ) . Samples

that are bracketed by CCVs not meeting these criteria must be reanalyzed.

Limits of Quantitation (LOQ): The lower LOQ (LLOQ) is the lowest non

- zero active standard in the

calibration curve; the peak area of the LLOQ must be at least 2X that of the average area counts for all

prepared procedural blank(s). By definition, the measured value of the LLOQ must be within 30% of the

theoretical value.

Demonstration of Specificity: Specificity is demonstrated by chromatographic retention time (within 4% of

standard) and the mass spectral response of unique ions.



## 13.3 Blanks

– Method/Procedural Blanks and Trip

Method/ Procedural Blanks: Multiple procedural blanks should be interspersed throughout the analysis batch

and the analytical sequence. At a minimum, method blanks are analyzed prior to instrument calibration, prior

to the analysis of CCV samples, after every 10 sample injections, and at the end of the analytical run.

The mean area counts (or area ratios when using IS calibration) for each analyte must be less than 50% of the

area count of the LOQ standard. If the area counts of the procedural blanks exceed 50% of the LOQ standard,

then the LOQ must be raised to the first standard level that meets criteria.

Trip Blank: A t rip blank of ASTM Type I water (or lab equivalent) is prepared in a sample container in the

laboratory and treated as a sample, including exposure to shipping, sampling site conditions, storage,

preservation and all analytical procedures. The trip blanks results for each analyte are included with the

repo rted sample results.



## 13.4 Data Accuracy and Precision

– Analysis Batch

Lab Control Spikes: The average recovery at each LCS level for each target analyte and appropriate SRS

should be within 80

- 120% and the percent relative standard deviation of the recoveries must be less than or

equal to 20%. If the average recovery of a spiking level falls outside method acceptance, but at least 67% (6

out of 9 ) o f LCS samples are within 20 % of their respective nominal value (33% of the QC samples, not all

replicates at the same concentration, may be outside 20% of nominal value), the average recovery will be

flagged as outside method acceptance criteria. All LCS samples will be control charted as per ETS

- 12

- 012. If

the average recovery of one of the spiking levels exceeded the analytical method uncertainty as determined by

ETS

- 12

- 012, that analytical batch uncertainty will be expanded for that particular study. The average recovery

at each LCS level for mixed branched/linear isomer PFOA and PFOS should be within 70

- 130% and the

percent relative standard deviation of the recoveries must be less than or equal to 20%.

Field Duplicates: The relative percent difference (RPD) of duplicate samples should be less than 20% for the

precision of sample preparation and analysis to be considered in control. Replicate samples not meeting the

20% RPD criteria are flagged and reported as outside of QC acceptance criteria.

Field Matrix Spikes: FMS acceptance criteria are recoveries within ±30% of the expected value for each

target analyte and appropriate SRS. Sample data with FMS recovery outside of ±30% but within ±50% of the

expected value are flagged and reported as outside of QC acceptance criteria. Data with FMS recovery

outside of ±50% of the expected value are reported as NR, where NR is defined as “Not Reportable” data

outside of QC acceptance criteria. If FMS recovery could not be assessed because FMSs were at an

inappropriate level, then Laboratory Matrix Spikes (LMSs) may be substituted. If LMS recoveries are within

±30% for each target analyte and SRSs the data are reportable but flagged as not meeting the FMS method

acceptance criteria.



## 13.5 Analytical Method Uncertainty

Analytical method uncertainty for each target analyte and SRS is determined with control charted historica l

analysis batch LCS data for the method and reported with each analysis batch. 5 

### Uncertainty determinations

5 

### Method uncertainty based on INTERNATIONAL ANS/ISO/IED STANDARD 17025 reference (GUM, Guide to the Expression of

Uncert ainty in Measurement). Method application demonstrated in ETS

- 12

- 012, citing references: a.) EURACHEM/CITAC Guide,

“Quantifying Uncertainty in Analytical Measurement,” Second Edition; Editors: S.L.R. Ellison, M. Rosslein, and A. Williams

. b.)Georgian, Thomas, “Estimation of Laboratory Analytical Uncertainty Using Laboratory Control Samples,” Environmental Testing &

### ETS -8- 044. 1 Page 21 of 22

Method of Analysis for the Determination of Perfluorinated Compounds in Wate r by LC/MS/MS; Direct Injection

Analysis are based on INTERNATIONAL ANS/ISO/IED STANDARD 17025 reference (GUM, Guide to the Expression

of Uncertainty in Measurement) and described in ETS -12- 012 . At least thirty data points are required for

determining analytical method uncertainty. The method uncertainty is defined as 2x the standard deviation of

the percent recoveries of the pooled lab control spikes. While all LCS data points are control charted, only the

most recent fifty data points are used for determining the method uncertainty.

When less than thirty LCS data points have been generated for a given analyte, the analysis batch LCSs are

used to determine the data uncertainty. If FMSs meet the ±30% recovery criteria at a level appropriate to the

endogenous level, and the LCS meet the ±20% recovery criteria, then the uncertainty of the data is determined

as within 100±20%.

Analysis batch sample data with FMS recovery outside of ±30% but within ±50% of the expected value are

flagged and reported as outside of QC acceptance criteria with expanded uncertainties. Data with FMS

recovery outside of ±50% of the expected value are reported as NR, where NR is defined as “Not Reportable”

data outside of QC acceptance criteria. If FMS recovery could not be assessed because FMSs were at an

inappropriate level, then Laboratory Matrix Spikes (LMSs) may be substituted. If LMS recoveries are within

±30% for each target analyte and appropriate SRSs the data are reportable but flagged as not meeting the

FMS method acceptance criteria with uncertainties of ±30%. If FMS do not meet the ±30% recovery criteria,

and historical FMS data does not exist, the analytical uncertainty is evaluated on a sample

- by -s ample basis,

the data may be reported with expanded uncertainty and are flagged.



## 13.6 Quantitation of PFOA/PFOS

– Analysis Batch

Calibration standards consisting of mixed branched and linear isomer PFOS/PFOA are preferred.

Quantitation is performed by integrating the linear and branched isomers together. Alternately, the linear and

branched isomers can be integrated separately, applying the appropriate true value to each calibration curve

po int for each isomer. The LCS and samples are then quantitated by integrating the linear and branched

isomers separately (requires separate analytical results files) and quantitating the resulting peak against the

linear or branched calibration curve

. The results from both integrations are then summed to produce the final

result. Integrating the linear and branched isomers separately may be helpful for those samples where the

linear/branched ratios do not closely match those of the reference standards.

Ho wever, for PFOS/PFOA target analytes, if the calibration standards are comprised of predominantly linear

isomers only t he method requires the addition of LCS s of mixed branched/linear isomer PFOS/PFOA. The

purpose of including these LCSs is to demonstrate quantitative equivalency (or quantitative bias) of the

isomeric mix when using a predominantly linear PFOS or PFOA standard for calibration. Alternatively, in lieu

of mixed branched and linear isomer PFOS/PFOA LCSs, mixed branched and linear isomer PFOS/ PFOA

TBMSs may be applied to demonstrate method accuracy and precision.

An alternate method of quantitation can be performed whereby only the linear isomer of PFOS/PFOA is

integrated and used for generating the calibration curve. The LCS and samples are then quantitated by

integrating the linear and branched isomers separately (requires separate analytical results files) and

quantitating the resulting peak against the linear calibration curve. The results from both integrations are then

summed to produce the final result. Integrating the linear and branched isomers separately reduces the on

column concentration for those samples that contain both linear and branched isomers of PFOA/PFOS. This

ensures that the concentration detected is within the a range of the calibration curve that is comparable

regardless of whether the calibration curve was generated using predominantly linear isomers of PFOS/PFOA

or linear plus branched isomers of PFOS/PFOA.



## 14 Pollution Prevention and Waste Management

Waste generated when performing this method will be disposed of appropriately. The original samples will be

archived at the 3M Environmental Laboratory in accordance with internal procedures.

Analysis, November/December 2000. c.)Taylor, B.N. and CE. Kuyatt, NIST Technical Note 1297, 1994 Edition: “Guidelines for

Evaluating and Expressing the Uncertainty of NIST Measurement Results.”d.)Adams, T.M., “A2LA Guide for the Estimation of

Measurement Uncertainty in Testing”, July 2002.

### ETS -8- 044. 1 Page 22 of 22

Method of Analysis for the Determination of Perfluorinated Compounds in Wate r by LC/MS/MS; Direct Injection

Analysis 

## 15 Records

Each data package generated for a study must include all supporting information for reconstruction of the data.

Information for the data package must include, but is not limited to the following items: study or project

number, sample and standard prep sheets/records, instrument run log (instrument batch records, instrument

ac quisition method, summary pages), instrument results files, chromatograms, calibration curves, and data

calculations.



## 16 Affected Documents

None.



## 17 Revisions

Revision

Number Summary of Changes

1 Section 1

. Included the use of internal standard calibration by this method.

Section 2. Included the use of internal standard calibration by this method. Included the

use of a solvent/water mixture when analyzing for PFUnA, PFDoA, PFTrDA, and FOSA.

Section 3

. Added definitions for internal standard, surrogate internal standard, and

surrogate recovery standard.

Section 6.Removed the details regarding the instrument parameters to section 10 of the

method

. Section 7. Updated reference standards to include internal standards and surrogates.

Changed concentration levels for working standards and included the use of internal

standards and surrogates.

Section 8. Inserted a new section on sample bottle preparation.

Se ction 9 Quality Control. This section was previously section 10 in ETS -8- 044.0. Updated

QC criteria to be consistent with method ETS -8- 154.4.

Section 10 Procedures . This section was previously section 8 (Sample Handling) in E TS -8-

044.0. Added detail regarding the preparation of LCSs. Included the use of methanol as a

dilution solvent.

Section 11 Samp le Analysis

. This section was previously section 10 in ETS -8- 044.0.

Included the details regarding the instrument parameters.

Section 12 Data Analysis and Calculations. This section was previously section 11 in ETS

8- 044.0. Removed the equation for calculating the analytes concentration, indicating that

this is done by the instrument software.

Section 13 Method Performance. This section was previously section 12 in ETS -8- 044.0.

Updated QC criteria to be consistent with ETS -8- 154.4. Added information on the

determination of analytical method uncertainty and quantitation of PFOA/PFOS.

Section 14 Pollution Prevention. This section was previously section 13 in ETS -8- 044.0.

Section 15 Records. This section was previously section 14 in ETS -8- 044.0.

Section 16 Affected Documents. This section was previously section 15 in ETS -8- 044.0.

Section 17 Revisions. This section was previously section 16 in ETS

- 8

- 044.0.