Final Checklist July 9, 2010 

### Steam Study Data Review Checklist

Nitrate/Nitrite EPA Method 353.2 (1993)

( Automated Colorimetry )

SECTION A

- 1. Sample Identifiers

Laboratory Name:

Sampling Episode: Sample Number s or

Range: Data Reviewer

signature: Date:

Instructions: Complet e this checklist electronically or using a ballpoint pen.

Record reviewer comments in the Reviewer Comment section.

Record detailed information in the Comments in the “Overa ll Assessment”

section for each criterion not (“N”) met.

Note: Requirements with a * are project requirements not specific to

EPA Method 353.2



### SECTION A

- 2. OVERALL ASSESSMENT OF THE QUALITY OF THE DATA

General Comment Checklist

Deliverable Requirement Review

Level

Required Present Comments

Copies of Shipping Documents (Fed

- Ex

Airbil ls) 1, 2, 3

Case Narrative 1, 2, 3

Table of Contents 3

Cross reference of Field Sample No., Lab

Sample No., and Analytical Batch 1, 2, 3

Traffic Report Form (including Sample

Receipt Checklist) 1, 2, 3

Sample Calculation (usually just a page

copied from SOW) 3

Results Summary for Each Sample and Blank 1, 2, 3

Standard Curve and Quality Control Sample

Results 3

Laboratory Reagent Blank Results 2, 3

Laboratory Fortified Blank Results 2, 3

Instrument Performance Check Solution

Resul ts 3Steam Study Data Review Checklist

Nitrate/Nitrite EPA Method 353.2 (1993)

Page 2 of 5

Final Checklist July 9, 2010 

### SECTION A

- 2. OVERALL ASSESSMENT OF THE QUALITY OF THE DATA

General Comment Checklist

Deliverable Requirement Review

Level

Required Present Comments

Laboratory Fortified Sample Matrix Results 3

Field Duplicate Results 2, 3

Quantitation List 3

Copies of Sample Preparation Work Sheets 3

Copies of Run Logs 3

Level 1: Review of traffic reports, sample handling, and proper sample prep aration

Level 2: Level 1 review plus review of QA/QC results

Level 3: Level 2 review plus review of instrument performance

Level 4: Level 3 review plus analysis of raw data such as chromatograms or primary instrument

outputSteam Study Data Review Checklist

Nitrate/Nitrite EPA Method 353.2 (1993)

Page 3 of 5

Final Checklist July 9, 2010 

### EPA Method 353.2 REQUIREMENT Reviewer Comment Criterion

met

Y N



### SECTION B. SAMPLE RECEIPT

1. Reviewed Sample Collection Record:

**•** Signatures?

**•** Completed?

**•** Sample ID numbers checked?

**•** Preservations? pH? Temp? Volume ?

**•** Any anomalies reported?

2. Reviewed Lab Sample Receipt Record :

**•** Date received?

**•** Lab ID number checked?

**•** Lab ID number referenced to Sample ID

n umbers ?

**•** Preservation checked by lab? pH? Temp?

Volume?

**•** Sample c onditions ?

**•** Sample hold time ?

**•** Any anomalies reported by lab ?



### SECTION C . SAMPLE PREPARATION

1. Reviewed Standard Pre logs :

**•** Standard expiration date:

**•** Concentrations prepared?

2. Reviewed Sample Prep Logs:

**•** Sample process or run date :

3. *Field Duplicates: Was a field duplicate collected

and analyzed as part of the sampling episode?

Indicate the relative percent difference.



### SECTION D

- 1 . QC INFORMATION

– Calibration

1. Review Lab’s Instrument Run Log Report: Were

calibrations, QC samples and samples included in a

batch of 20 samples?

2. Standard Curve: Were at least three nitrate

standards and one blank used to create a calibration

curve?

Was at least one nitrite standard analyzed to verify

the reduction capability of the copper

- cadmium

column? (353.2/10.1)

What were the concentration s of the calibration

standards used by lab?



### Section D

- 2. QC INFORMATION

– Blanks /DuplicatesSteam Study Data Review Checklist

Nitrate/Nitrite EPA Method 353.2 (1993)

Page 4 of 5

Final Checklist July 9, 2010 

### EPA Method 353.2 REQUIREMENT Reviewer Comment Criterion

met

Y N

1. Laboratory Reagent Blank: Was a laboratory

reagent blank analyzed with each batch of samples

and were the results always less than the Method

D etection Limit (MDL)? ( 353.2 /9.3.1)

Note any contamination reported by the lab.

2. Laboratory Fortified Blank (LFB) : Was a LFB

analyzed with each batch of samples and was the

percent recovery of all analytes within 90

- 110%?

( 353.2 /9.3.2)

What were the concentrations of all analytes in the

LFB reported by the lab?

What were the % recoveries of all the analytes?



### Section D

- 3. QC INFORMATION

– Instrument Performance Results

1. Quality Control Sample (QCS) data enclosed? :

Was a QCS used t o verify the calibration (i.e., were

results within ±10% of QCS true value) ?

(353.2/9.2.3/10.7)

What was the true value of the QCS?

What was the QCS value reported by the labs ?

What was the percent recovery?

2. Instrument Perfor mance Check Solution: Was an

instrument performance check solution (IPC) and

calibration blank analyzed immediately after daily

calibration, following every ten samples, and at the

conclusion of the sample run?

Did all results for the IPC solution and cali bration

blank verify that the instrument was within ±10% of

calibration? (353.2/9.3.4)

What were results reported for the IPC and

calibration blank and what were the percent

recoveries ?

3. Laboratory Fortified Sample Matrix (LFM) : Was

a known amount of an alyte ( ≥4 times MDL) added

to at least 10% of samples and was the percent

recovery within 90

- 110%? (353.2/9.4)

What were the % recoveries for all analytes?



### SECTION E

. DATA REVIEW

– Sample Re sults

1. Calculation: Was the standard curve used to

calculate the concentration of nitrate/nitrite in the

sample? (353.2/12.1)Steam Study Data Review Checklist

Nitrate/Nitrite EPA Method 353.2 (1993)

Page 5 of 5

Final Checklist July 9, 2010 

### EPA Method 353.2 REQUIREMENT Reviewer Comment Criterion

met

Y N

2. Dilution: If a result was greater than the highest

standard used to calculate the calibration curve, was

the sample diluted an d reanalyzed? (353.2/12.2)

3. Sample Results Reporting:

Were only results between the lowest and highest

standards reported? (353.2/12.2)

Were results reported in mg/L as nitrogen?

(353.2/12.3)