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1941 Reymet Road l Richmond, Virginia 23237 l Tel: (804)-358-8295 Fax: (804)-358-8297 Laboratory Order ID 17J0954 Certificate of Analysis Client Name: Enclosed are the results of analyses for samples received by the laboratory on 10/31/2017 15:07. If you have any questions concerning this report, please feel free to contact the laboratory. Sincerely, Ted Soyars Laboratory Manager Manassas, VA 20109 8854 Rixlew Lane Purchase Order: [none] Project Number: Date Issued: Date Received: Submitted To: Client Site I.D.: November 1, 2017 15:55 October 31, 2017 15:07 APEX Companies, LLC. -Manassas William Thomas End Notes: The test results listed in this report relate only to the samples submitted to the laboratory and as received by the Laboratory. Unless otherwise noted, the test results for solid materials are calculated on a wet weight basis. Analyses for pH, dissolved oxygen, temperature, residual chlorine and sulfite that are performed in the laboratory do not meet NELAC requirements due to extremely short holding times. These analyses should be performed in the field. The results of field analyses performed by the Sampler included in the Certificate of Analysis are done so at the clients request and are not included in the laboratorys fields of certification nor have they been audited for adherence to a reference method or procedure. The signature on the final report certifies that these results conform to all applicable NELAC standards unless otherwise specified. For a complete list of the Laboratorys NELAC certified parameters please contact customer service. This report shall not be reproduced except in full without the expressed and written approval of an authorized representative of Air Water & Soil Laboratories, Inc. Moncure ES Final Report Page 1 of 13

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1941 Reymet Road l Richmond, Virginia 23237 l Tel: (804)-358-8295 Fax: (804)-358-8297

Laboratory Order ID 17J0954

Certificate of Analysis

Client Name:

Enclosed are the results of analyses for samples received by the laboratory on 10/31/2017 15:07. If you

have any questions concerning this report, please feel free to contact the laboratory.

Sincerely,

Ted Soyars

Laboratory Manager

Manassas, VA 20109

8854 Rixlew Lane

Purchase Order:

[none]Project Number:

Date Issued:

Date Received:

Submitted To:

Client Site I.D.:

November 1, 2017 15:55

October 31, 2017 15:07APEX Companies, LLC. -Manassas

William Thomas

End Notes:

The test results listed in this report relate only to the samples submitted to the laboratory and as received by the Laboratory.

Unless otherwise noted, the test results for solid materials are calculated on a wet weight basis. Analyses for pH, dissolved oxygen,

temperature, residual chlorine and sulfite that are performed in the laboratory do not meet NELAC requirements due to extremely

short holding times. These analyses should be performed in the field. The results of field analyses performed by the Sampler

included in the Certificate of Analysis are done so at the client�s request and are not included in the laboratory�s fields of certification

nor have they been audited for adherence to a reference method or procedure.

The signature on the final report certifies that these results conform to all applicable NELAC standards unless otherwise specified.

For a complete list of the Laboratory�s NELAC certified parameters please contact customer service.

This report shall not be reproduced except in full without the expressed and written approval of an authorized representative of Air

Water & Soil Laboratories, Inc.

Moncure ES

Final Report

Page 1 of 13

Client Site I.D.:

Project Number:Submitted To:

Date Issued:APEX Companies, LLC. -Manassas

8854 Rixlew Lane

[none]William Thomas

Manassas VA, 20109

1941 Reymet Road l Richmond, Virginia 23230 l Tel: (804)-358-8295 Fax: (804)-358-8297

Certificate of Analysis

Client Name:

Purchase Order:

11/1/2017 15:55

Moncure ES

Final Report

ANALYTICAL REPORT FOR SAMPLES

Laboratory Order ID 17J0954

MatrixSample ID Laboratory ID Date Sampled Date Received

MCE2-Field Blank 17J0954-01 10/31/2017 15:07Drinking Water 10/31/2017 07:56

MCE2-EXT-ENT-8L 17J0954-02 10/31/2017 15:07Drinking Water 10/31/2017 07:25

MCE2-EXT-ADPR 17J0954-03 10/31/2017 15:07Drinking Water 10/31/2017 07:49

MCE2-EXT-ADDL 17J0954-04 10/31/2017 15:07Drinking Water 10/31/2017 07:50

MCE2-EXT-ENT-12L 17J0954-05 10/31/2017 15:07Drinking Water 10/31/2017 07:46

Page 2 of 10Page 2 of 13

Client Site I.D.:

Project Number:Submitted To:

Date Issued:APEX Companies, LLC. -Manassas

8854 Rixlew Lane

[none]William Thomas

Manassas VA, 20109

1941 Reymet Road l Richmond, Virginia 23230 l Tel: (804)-358-8295 Fax: (804)-358-8297

Certificate of Analysis

Client Name:

Purchase Order:

11/1/2017 15:55

Moncure ES

Final Report

Laboratory Order ID: 17J0954

ResultParameter

Reporting

LimitMethod Qual AnalystAnalysis

Date/TimeD.F. Samp IDSample Prep

Date/Time

MCE2-Field Blank Laboratory Sample ID:Sample I.D. 17J0954-01

Analytical Results

Grab Date/Time: 10/31/2017 07:56

Metals (Total) by EPA 200 Series Methods

EPA200.8 R5.4 MWL<1.00 ug/L 1.00 101 10/31/17 17:00 11/01/17 11:29Lead

Page 3 of 10Page 3 of 13

Client Site I.D.:

Project Number:Submitted To:

Date Issued:APEX Companies, LLC. -Manassas

8854 Rixlew Lane

[none]William Thomas

Manassas VA, 20109

1941 Reymet Road l Richmond, Virginia 23230 l Tel: (804)-358-8295 Fax: (804)-358-8297

Certificate of Analysis

Client Name:

Purchase Order:

11/1/2017 15:55

Moncure ES

Final Report

Laboratory Order ID: 17J0954

ResultParameter

Reporting

LimitMethod Qual AnalystAnalysis

Date/TimeD.F. Samp IDSample Prep

Date/Time

MCE2-EXT-ENT-8L Laboratory Sample ID:Sample I.D. 17J0954-02

Analytical Results

Grab Date/Time: 10/31/2017 07:25

Metals (Total) by EPA 200 Series Methods

EPA200.8 R5.4 29.6 ug/L MWL1.00 102 10/31/17 17:00 11/01/17 11:33Lead

Page 4 of 10Page 4 of 13

Client Site I.D.:

Project Number:Submitted To:

Date Issued:APEX Companies, LLC. -Manassas

8854 Rixlew Lane

[none]William Thomas

Manassas VA, 20109

1941 Reymet Road l Richmond, Virginia 23230 l Tel: (804)-358-8295 Fax: (804)-358-8297

Certificate of Analysis

Client Name:

Purchase Order:

11/1/2017 15:55

Moncure ES

Final Report

Laboratory Order ID: 17J0954

ResultParameter

Reporting

LimitMethod Qual AnalystAnalysis

Date/TimeD.F. Samp IDSample Prep

Date/Time

MCE2-EXT-ADPR Laboratory Sample ID:Sample I.D. 17J0954-03

Analytical Results

Grab Date/Time: 10/31/2017 07:49

Metals (Total) by EPA 200 Series Methods

EPA200.8 R5.4 66.5 ug/L MWL1.00 103 10/31/17 17:00 11/01/17 11:37Lead

Page 5 of 10Page 5 of 13

Client Site I.D.:

Project Number:Submitted To:

Date Issued:APEX Companies, LLC. -Manassas

8854 Rixlew Lane

[none]William Thomas

Manassas VA, 20109

1941 Reymet Road l Richmond, Virginia 23230 l Tel: (804)-358-8295 Fax: (804)-358-8297

Certificate of Analysis

Client Name:

Purchase Order:

11/1/2017 15:55

Moncure ES

Final Report

Laboratory Order ID: 17J0954

ResultParameter

Reporting

LimitMethod Qual AnalystAnalysis

Date/TimeD.F. Samp IDSample Prep

Date/Time

MCE2-EXT-ADDL Laboratory Sample ID:Sample I.D. 17J0954-04

Analytical Results

Grab Date/Time: 10/31/2017 07:50

Metals (Total) by EPA 200 Series Methods

EPA200.8 R5.4 1020 ug/L MWL10.0 1004RE1 10/31/17 17:00 11/01/17 14:38Lead

Page 6 of 10Page 6 of 13

Client Site I.D.:

Project Number:Submitted To:

Date Issued:APEX Companies, LLC. -Manassas

8854 Rixlew Lane

[none]William Thomas

Manassas VA, 20109

1941 Reymet Road l Richmond, Virginia 23230 l Tel: (804)-358-8295 Fax: (804)-358-8297

Certificate of Analysis

Client Name:

Purchase Order:

11/1/2017 15:55

Moncure ES

Final Report

Laboratory Order ID: 17J0954

ResultParameter

Reporting

LimitMethod Qual AnalystAnalysis

Date/TimeD.F. Samp IDSample Prep

Date/Time

MCE2-EXT-ENT-12L Laboratory Sample ID:Sample I.D. 17J0954-05

Analytical Results

Grab Date/Time: 10/31/2017 07:46

Metals (Total) by EPA 200 Series Methods

EPA200.8 R5.4 10.2 ug/L MWL1.00 105 10/31/17 17:00 11/01/17 11:44Lead

Analytical Summary

Sample IDPreparation Factors

Initial / FinalSequence ID Calibration IDBatch IDMethod

EPA200.8 R5.4Preparation Method:Metals (Total) by EPA 200 Series Methods

17J0954-01 BAJ0980 SAK0004EPA200.8 R5.4 AK7000650.0 mL / 50.0 mL

17J0954-02 BAJ0980 SAK0004EPA200.8 R5.4 AK7000650.0 mL / 50.0 mL

17J0954-03 BAJ0980 SAK0004EPA200.8 R5.4 AK7000650.0 mL / 50.0 mL

17J0954-04 BAJ0980 SAK0004EPA200.8 R5.4 AK7000650.0 mL / 50.0 mL

17J0954-04RE1 BAJ0980 SAK0004EPA200.8 R5.4 AK7000650.0 mL / 50.0 mL

17J0954-05 BAJ0980 SAK0004EPA200.8 R5.4 AK7000650.0 mL / 50.0 mL

Page 7 of 10Page 7 of 13

Client Site I.D.:

Project Number:Submitted To:

Date Issued:APEX Companies, LLC. -Manassas

8854 Rixlew Lane

[none]William Thomas

Manassas VA, 20109

1941 Reymet Road l Richmond, Virginia 23230 l Tel: (804)-358-8295 Fax: (804)-358-8297

Certificate of Analysis

Client Name:

Purchase Order:

11/1/2017 15:55

Moncure ES

Final Report

Result Limit

Reporting

Units Level

Spike

Result

Source

%REC

%REC

Limits RPD

RPD

Limit Qual Analyte

Metals (Total) by EPA 200 Series Methods - Quality Control

Air Water and Soil Laboratories, Inc.

Batch BAJ0980 - EPA200.8 R5.4

Blank (BAJ0980-BLK1) Prepared: 10/31/2017 Analyzed: 11/01/2017

1.00 ug/L<1.00 ug/LLead

LCS (BAJ0980-BS1) Prepared: 10/31/2017 Analyzed: 11/01/2017

1.00 50.0 85-115101ug/L50.3 ug/L ug/LLead

LCS Dup (BAJ0980-BSD1) Prepared: 10/31/2017 Analyzed: 11/01/2017

1.00 50.0 2085-11598.5 2.17ug/L49.2 ug/L ug/LLead

Matrix Spike (BAJ0980-MS1) Prepared: 10/31/2017 Analyzed: 11/01/2017Source: 17J0955-03

1.00 50.0 70-13096.0ug/L57.0 ug/L 8.99 ug/LLead

Matrix Spike Dup (BAJ0980-MSD1) Prepared: 10/31/2017 Analyzed: 11/01/2017Source: 17J0955-03

1.00 50.0 2070-13099.0 2.66ug/L58.5 ug/L 8.99 ug/LLead

Page 8 of 10Page 8 of 13

Client Site I.D.:

Project Number:Submitted To:

Date Issued:APEX Companies, LLC. -Manassas

8854 Rixlew Lane

[none]William Thomas

Manassas VA, 20109

1941 Reymet Road l Richmond, Virginia 23230 l Tel: (804)-358-8295 Fax: (804)-358-8297

Certificate of Analysis

Client Name:

Purchase Order:

11/1/2017 15:55

Moncure ES

Final Report

Certified Analyses included in this Report

CertificationsAnalyte

EPA200.8 R5.4 in Potable Water

Lead VELAP

Code Description Lab Number Expires

341 12/31/2017Maryland DE Drinking WaterMdDOE

495 12/31/2017North Carolina DENRNC

460021 06/14/2018NELAC-Virginia Certificate #9439VELAP

350 11/30/2017West Virginia DEPWVDEP

Page 9 of 10Page 9 of 13

Client Site I.D.:

Project Number:Submitted To:

Date Issued:APEX Companies, LLC. -Manassas

8854 Rixlew Lane

[none]William Thomas

Manassas VA, 20109

1941 Reymet Road l Richmond, Virginia 23230 l Tel: (804)-358-8295 Fax: (804)-358-8297

Certificate of Analysis

Client Name:

Purchase Order:

11/1/2017 15:55

Moncure ES

Final Report

Summary of Data Qualifiers

Relative Percent DifferenceRPD

QualifersQual

Denotes sample was re-analyzed-RE

Dilution Factor. Please also see the Preparation Factor in the Analysis Summary section.D.F.

TIC Tentatively Identified Compounds are compounds that are identified by comparing the analyte mass spectral pattern with the NIST spectral library .

A TIC spectral match is reported when the pattern is at least 75% consistent with the published pattern. Compound concentrations are estimated

and are calculated using an internal standard response factor of 1.

PCBs, Total Total PCBs are defined as the sum of detected Aroclors 1016, 1221, 1232, 1248, 1254, 1260, 1262, and 1268.

Page 10 of 10Page 10 of 13

Page 11 of 13

Page 12 of 13

Client Site I.D.:

Project Number:Submitted To:

Date Issued:APEX Companies, LLC. -Manassas

8854 Rixlew Lane

[none]William Thomas

Manassas VA, 20109

1941 Reymet Road l Richmond, Virginia 23230 l Tel: (804)-358-8295 Fax: (804)-358-8297

Certificate of Analysis

Client Name:

Purchase Order:

11/1/2017 15:55

Moncure ES

Final Report

Samples Received at: 19.60°C

How were samples received?

NA

Sample Conditions Checklist

NA

Yes

Yes

Yes

Yes

Yes

Yes

Yes

No

Yes

Courier

Work Order Comments

Were Custody Seals used? If so, were they received intact?

Are the custody papers filled out completely and correctly?

Do all bottle labels agree with custody papers?

Is the temperature blank or representative sample within acceptable limits? (above freezing to 6°C) or received on ice and

recently taken?

Are all samples within holding time for requested laboratory tests?

Is a sufficient amount of sample provided to perform the tests included?

Are all samples in appropriate containers for the analyses requested?

Were volatile organic containers received?

Are all volatile organic and TOX containers free of headspace?

Is a trip blank provided for each VOC sample set? VOC sample sets include EPA8011, EPA504, EPA8260, EPA624,

EPA8015 GRO, EPA8021, EPA524, and RSK-175.

Are all samples received appropriately preserved? Note that metals containers do not require field preservation but lab

preservation may delay analysis.

Page 13 of 13

1941 Reymet Road l Richmond, Virginia 23237 l Tel: (804)-358-8295 Fax: (804)-358-8297

Laboratory Order ID 17J0356

Certificate of Analysis

Client Name:

Enclosed are the results of analyses for samples received by the laboratory on 10/10/2017 12:40. If you

have any questions concerning this report, please feel free to contact the laboratory.

Sincerely,

Ted Soyars

Laboratory Manager

Manassas, VA 20109

8854 Rixlew Lane

Purchase Order:

2500489Project Number:

Date Issued:

Date Received:

Submitted To:

Client Site I.D.:

October 18, 2017 14:57

October 10, 2017 12:40APEX Companies, LLC. -Manassas

William Thomas

End Notes:

The test results listed in this report relate only to the samples submitted to the laboratory and as received by the Laboratory.

Unless otherwise noted, the test results for solid materials are calculated on a wet weight basis. Analyses for pH, dissolved oxygen,

temperature, residual chlorine and sulfite that are performed in the laboratory do not meet NELAC requirements due to extremely

short holding times. These analyses should be performed in the field. The results of field analyses performed by the Sampler

included in the Certificate of Analysis are done so at the client�s request and are not included in the laboratory�s fields of certification

nor have they been audited for adherence to a reference method or procedure.

The signature on the final report certifies that these results conform to all applicable NELAC standards unless otherwise specified.

For a complete list of the Laboratory�s NELAC certified parameters please contact customer service.

This report shall not be reproduced except in full without the expressed and written approval of an authorized representative of Air

Water & Soil Laboratories, Inc.

Moncure Elementary

Final Report

Page 1 of 11

Client Site I.D.:

Project Number:Submitted To:

Date Issued:APEX Companies, LLC. -Manassas

8854 Rixlew Lane

2500489William Thomas

Manassas VA, 20109

1941 Reymet Road l Richmond, Virginia 23230 l Tel: (804)-358-8295 Fax: (804)-358-8297

Certificate of Analysis

Client Name:

Purchase Order:

10/18/2017 14:57

Moncure Elementary

Final Report

ANALYTICAL REPORT FOR SAMPLES

Laboratory Order ID 17J0356

MatrixSample ID Laboratory ID Date Sampled Date Received

MCE2-BU1-BS 17J0356-01 10/10/2017 12:40Drinking Water 10/07/2017 07:44

MCE2-WCS-A-Art 17J0356-02 10/10/2017 12:40Drinking Water 10/07/2017 07:41

MCE2-Field Blank 17J0356-03 10/10/2017 12:40Drinking Water 10/07/2017 07:45

Page 2 of 8Page 2 of 11

Client Site I.D.:

Project Number:Submitted To:

Date Issued:APEX Companies, LLC. -Manassas

8854 Rixlew Lane

2500489William Thomas

Manassas VA, 20109

1941 Reymet Road l Richmond, Virginia 23230 l Tel: (804)-358-8295 Fax: (804)-358-8297

Certificate of Analysis

Client Name:

Purchase Order:

10/18/2017 14:57

Moncure Elementary

Final Report

Laboratory Order ID: 17J0356

ResultParameter

Reporting

LimitMethod Qual AnalystAnalysis

Date/TimeD.F. Samp IDSample Prep

Date/Time

MCE2-BU1-BS Laboratory Sample ID:Sample I.D. 17J0356-01

Analytical Results

Grab Date/Time: 10/07/2017 07:44

Metals (Total) by EPA 200 Series Methods

EPA200.8 R5.4 4.95 ug/L MWL1.00 101 10/13/17 17:00 10/17/17 19:11Lead

Page 3 of 8Page 3 of 11

Client Site I.D.:

Project Number:Submitted To:

Date Issued:APEX Companies, LLC. -Manassas

8854 Rixlew Lane

2500489William Thomas

Manassas VA, 20109

1941 Reymet Road l Richmond, Virginia 23230 l Tel: (804)-358-8295 Fax: (804)-358-8297

Certificate of Analysis

Client Name:

Purchase Order:

10/18/2017 14:57

Moncure Elementary

Final Report

Laboratory Order ID: 17J0356

ResultParameter

Reporting

LimitMethod Qual AnalystAnalysis

Date/TimeD.F. Samp IDSample Prep

Date/Time

MCE2-WCS-A-Art Laboratory Sample ID:Sample I.D. 17J0356-02

Analytical Results

Grab Date/Time: 10/07/2017 07:41

Metals (Total) by EPA 200 Series Methods

EPA200.8 R5.4 12.5 ug/L MWL1.00 102 10/13/17 17:00 10/17/17 19:15Lead

Page 4 of 8Page 4 of 11

Client Site I.D.:

Project Number:Submitted To:

Date Issued:APEX Companies, LLC. -Manassas

8854 Rixlew Lane

2500489William Thomas

Manassas VA, 20109

1941 Reymet Road l Richmond, Virginia 23230 l Tel: (804)-358-8295 Fax: (804)-358-8297

Certificate of Analysis

Client Name:

Purchase Order:

10/18/2017 14:57

Moncure Elementary

Final Report

Laboratory Order ID: 17J0356

ResultParameter

Reporting

LimitMethod Qual AnalystAnalysis

Date/TimeD.F. Samp IDSample Prep

Date/Time

MCE2-Field Blank Laboratory Sample ID:Sample I.D. 17J0356-03

Analytical Results

Grab Date/Time: 10/07/2017 07:45

Metals (Total) by EPA 200 Series Methods

EPA200.8 R5.4 MWL<1.00 ug/L 1.00 103 10/13/17 17:00 10/17/17 19:18Lead

Analytical Summary

Sample IDPreparation Factors

Initial / FinalSequence ID Calibration IDBatch IDMethod

EPA200.2/R2.8Preparation Method:Metals (Total) by EPA 200 Series Methods

17J0356-01 BAJ0417 SAJ0455EPA200.8 R5.4 AJ7008050.0 mL / 50.0 mL

17J0356-02 BAJ0417 SAJ0455EPA200.8 R5.4 AJ7008050.0 mL / 50.0 mL

17J0356-03 BAJ0417 SAJ0455EPA200.8 R5.4 AJ7008050.0 mL / 50.0 mL

Page 5 of 8Page 5 of 11

Client Site I.D.:

Project Number:Submitted To:

Date Issued:APEX Companies, LLC. -Manassas

8854 Rixlew Lane

2500489William Thomas

Manassas VA, 20109

1941 Reymet Road l Richmond, Virginia 23230 l Tel: (804)-358-8295 Fax: (804)-358-8297

Certificate of Analysis

Client Name:

Purchase Order:

10/18/2017 14:57

Moncure Elementary

Final Report

Result Limit

Reporting

Units Level

Spike

Result

Source

%REC

%REC

Limits RPD

RPD

Limit Qual Analyte

Metals (Total) by EPA 200 Series Methods - Quality Control

Air Water and Soil Laboratories, Inc.

Batch BAJ0417 - EPA200.2/R2.8

Blank (BAJ0417-BLK1) Prepared: 10/13/2017 Analyzed: 10/17/2017

1.00 ug/L<1.00 ug/LLead

LCS (BAJ0417-BS1) Prepared: 10/13/2017 Analyzed: 10/17/2017

1.00 50.0 85-115100ug/L50.2 ug/L ug/LLead

LCS Dup (BAJ0417-BSD1) Prepared: 10/13/2017 Analyzed: 10/17/2017

1.00 50.0 2085-11599.2 1.28ug/L49.6 ug/L ug/LLead

Matrix Spike (BAJ0417-MS1) Prepared: 10/13/2017 Analyzed: 10/17/2017Source: 17J0307-28

1.00 50.0 70-13098.9ug/L103 ug/L 53.1 ug/LLead

Matrix Spike (BAJ0417-MS2) Prepared: 10/13/2017 Analyzed: 10/17/2017Source: 17J0355-01

1.00 50.0 70-130-0.222ug/L11.3 ug/L 11.4 ug/LLead M

Matrix Spike Dup (BAJ0417-MSD1) Prepared: 10/13/2017 Analyzed: 10/17/2017Source: 17J0307-28

1.00 50.0 2070-13098.8 0.0481ug/L103 ug/L 53.1 ug/LLead

Matrix Spike Dup (BAJ0417-MSD2) Prepared: 10/13/2017 Analyzed: 10/17/2017Source: 17J0355-01

1.00 50.0 2070-1300.177 1.75ug/L11.5 ug/L 11.4 ug/LLead M

Page 6 of 8Page 6 of 11

Client Site I.D.:

Project Number:Submitted To:

Date Issued:APEX Companies, LLC. -Manassas

8854 Rixlew Lane

2500489William Thomas

Manassas VA, 20109

1941 Reymet Road l Richmond, Virginia 23230 l Tel: (804)-358-8295 Fax: (804)-358-8297

Certificate of Analysis

Client Name:

Purchase Order:

10/18/2017 14:57

Moncure Elementary

Final Report

Certified Analyses included in this Report

CertificationsAnalyte

EPA200.8 R5.4 in Potable Water

Lead VELAP

Code Description Lab Number Expires

341 12/31/2017Maryland DE Drinking WaterMdDOE

495 12/31/2017North Carolina DENRNC

001 10/31/2017NELAC-PennsylvaniaPADEP

460021 06/14/2018NELAC-Virginia Certificate #9439VELAP

350 11/30/2017West Virginia DEPWVDEP

Page 7 of 8Page 7 of 11

Client Site I.D.:

Project Number:Submitted To:

Date Issued:APEX Companies, LLC. -Manassas

8854 Rixlew Lane

2500489William Thomas

Manassas VA, 20109

1941 Reymet Road l Richmond, Virginia 23230 l Tel: (804)-358-8295 Fax: (804)-358-8297

Certificate of Analysis

Client Name:

Purchase Order:

10/18/2017 14:57

Moncure Elementary

Final Report

Summary of Data Qualifiers

M Matrix spike recovery is outside established acceptance limits

Relative Percent DifferenceRPD

QualifersQual

Denotes sample was re-analyzed-RE

Dilution Factor. Please also see the Preparation Factor in the Analysis Summary section.D.F.

TIC Tentatively Identified Compounds are compounds that are identified by comparing the analyte mass spectral pattern with the NIST spectral library .

A TIC spectral match is reported when the pattern is at least 75% consistent with the published pattern. Compound concentrations are estimated

and are calculated using an internal standard response factor of 1.

PCBs, Total Total PCBs are defined as the sum of detected Aroclors 1016, 1221, 1232, 1248, 1254, 1260, 1262, and 1268.

Page 8 of 8Page 8 of 11

Page 9

of 1

1

Pag

e 1

0 o

f 11

Client Site I.D.:

Project Number:Submitted To:

Date Issued:APEX Companies, LLC. -Manassas

8854 Rixlew Lane

2500489William Thomas

Manassas VA, 20109

1941 Reymet Road l Richmond, Virginia 23230 l Tel: (804)-358-8295 Fax: (804)-358-8297

Certificate of Analysis

Client Name:

Purchase Order:

10/18/2017 14:57

Moncure Elementary

Final Report

Samples Received at: 27.50°C

How were samples received?

NA

Sample Conditions Checklist

NA

No

Yes

Yes

No

Yes

Yes

Yes

No

Yes

Courier

Work Order Comments

Were Custody Seals used? If so, were they received intact?

Are the custody papers filled out completely and correctly?

Do all bottle labels agree with custody papers?

Is the temperature blank or representative sample within acceptable limits? (above freezing to 6°C) or received on ice and

recently taken?

Are all samples within holding time for requested laboratory tests?

Is a sufficient amount of sample provided to perform the tests included?

Are all samples in appropriate containers for the analyses requested?

Were volatile organic containers received?

Are all volatile organic and TOX containers free of headspace?

Is a trip blank provided for each VOC sample set? VOC sample sets include EPA8011, EPA504, EPA8260, EPA624,

EPA8015 GRO, EPA8021, EPA524, and RSK-175.

Are all samples received appropriately preserved? Note that metals containers do not require field preservation but lab

preservation may delay analysis.

Page 11 of 11