ATT A - Human Health Risk Assessment-Walnut Bluff — Signal Hill City Council, November 13, 2025 (part 2 of 2)

Project Number:

Project Manager:

Walnut Bluff
[none]
Yola Byram
Reported: 11/11/2024 15:09
BCL Sample ID: 2416404-05 Client Sample Name:

Method Prep Date Date/Time
Run
Analyst Instrument Dilution Batch ID
QC
Volatile Organic Compounds by GC/MS (EPA Method TO-15 at STP) DCN
WB05-1H, 10/9/2024 12:08:00PM, Elizabeth Hwang/Olivia Hogan 1 EPA-TO-15-SIM 10/11/24 09:33 10/11/24 18:16 BEP MS-A2 1 B198723 EPA TO-15 2 EPA-TO-15-SIM 10/11/24 09:33 10/14/24 21:21 BEP MS-A2 10 B198806 EPA TO-15 DCN = Data Continuation Number
The results in this report apply to the samples analyzed in accordance with the chain of custody document. This analytical report must be reproduced in its entirety. All results listed in this report are for the exclusive use of the submitting party. Pace Analytical assumes no responsibility for report alteration, separation, detachment or third party interpretation. 4100 Atlas Court Bakersfield, CA 93308 (661) 327-4911 FAX (661) 327-1918 www.pacelabs.com Report ID: 1001550739 Page 21 of 50 Catalyst Environmental Solutions
315 Montana Ave Suite 311
Santa Monica, CA 90403
Project:

Project Number:

Project Manager:

Walnut Bluff
[none]
Yola Byram
Reported: 11/11/2024 15:09
Pace Sample ID: 2416404-06 Client Sample Name:

Constituent Result Units Method Bias Quals
MB Lab
Volatile Organic Compounds by GC/MS (EPA Method TO-15 at STP) DCN
WB06-1H, 10/9/2024 11:42:00AM, Elizabeth Hwang/Olivia Hogan

PQL MDL
Benzene 1.4 ug/m3 0.050 0.0032 EPA-TO-15-SIM ND 1
Benzyl chloride ND ug/m3 0.50 0.0052 EPA-TO-15-SIM ND 1 Carbon tetrachloride 0.49 ug/m3 0.20 0.0063 EPA-TO-15-SIM ND 1 Chlorobenzene ND ug/m3 0.10 0.0079 EPA-TO-15-SIM ND 1
Chloroform 0.23 ug/m3 0.050 0.0058 EPA-TO-15-SIM ND 1
1,2-Dibromoethane ND ug/m3 0.20 0.014 EPA-TO-15-SIM ND 1 1,2-Dichlorobenzene ND ug/m3 0.20 0.011 EPA-TO-15-SIM ND 1 1,3-Dichlorobenzene ND ug/m3 0.20 0.013 EPA-TO-15-SIM ND 1 1,4-Dichlorobenzene 0.10 ug/m3 0.20 0.016 EPA-TO-15-SIM ND J 1 Dichlorodifluoromethane 2.3 ug/m3 0.050 0.0052 EPA-TO-15-SIM ND 1 1,1-Dichloroethane ND ug/m3 0.050 0.0041 EPA-TO-15-SIM ND 1 1,2-Dichloroethane 0.093 ug/m3 0.10 0.0046 EPA-TO-15-SIM ND J 1 1,1-Dichloroethene ND ug/m3 0.050 0.0078 EPA-TO-15-SIM ND 1 cis-1,2-Dichloroethene ND ug/m3 0.050 0.0044 EPA-TO-15-SIM ND 1 trans-1,2-Dichloroethene ND ug/m3 0.050 0.0075 EPA-TO-15-SIM ND 1 trans-1,3-Dichloropropene ND ug/m3 0.050 0.013 EPA-TO-15-SIM ND 1 1,1-Difluoroethane 1.2 ug/m3 5.0 0.0027 EPA-TO-15-SIM ND J 1 Ethylbenzene 0.66 ug/m3 0.050 0.017 EPA-TO-15-SIM ND 1
Naphthalene 0.23 ug/m3 0.20 0.020 EPA-TO-15-SIM ND 1
Tetrachloroethene ND ug/m3 0.10 0.011 EPA-TO-15-SIM ND 1 Toluene 2.6 ug/m3 1.0 0.062 EPA-TO-15-SIM ND 2
1,1,1-Trichloroethane ND ug/m3 0.10 0.0055 EPA-TO-15-SIM ND 1 1,1,2-Trichloroethane ND ug/m3 0.10 0.0055 EPA-TO-15-SIM ND 1 Trichloroethene ND ug/m3 0.10 0.0095 EPA-TO-15-SIM ND 1 Trichlorofluoromethane 1.2 ug/m3 0.050 0.0057 EPA-TO-15-SIM ND 1 1,1,2-Trichloro-1,2,2-trifluoroethane 0.52 ug/m3 0.10 0.0078 EPA-TO-15-SIM ND 1 Vinyl chloride ND ug/m3 0.020 0.0046 EPA-TO-15-SIM ND 1 p- & m-Xylenes 2.2 ug/m3 0.050 0.0082 EPA-TO-15-SIM ND 1 o-Xylene 0.74 ug/m3 0.050 0.0044 EPA-TO-15-SIM ND 1
Total Xylenes 2.9 ug/m3 0.10 0.013 EPA-TO-15-SIM ND 1
4-Bromofluorobenzene (Surrogate) 108 % 50 - 150 (LCL - UCL) EPA-TO-15-SIM 1 4-Bromofluorobenzene (Surrogate) 108 % 50 - 150 (LCL - UCL) EPA-TO-15-SIM 1 4-Bromofluorobenzene (Surrogate) 89.1 % 50 - 150 (LCL - UCL) EPA-TO-15-SIM 2 The results in this report apply to the samples analyzed in accordance with the chain of custody document. This analytical report must be reproduced in its entirety. All results listed in this report are for the exclusive use of the submitting party. Pace Analytical assumes no responsibility for report alteration, separation, detachment or third party interpretation. 4100 Atlas Court Bakersfield, CA 93308 (661) 327-4911 FAX (661) 327-1918 www.pacelabs.com Report ID: 1001550739 Page 22 of 50 Catalyst Environmental Solutions
315 Montana Ave Suite 311
Santa Monica, CA 90403
Project:

Project Number:

Project Manager:

Walnut Bluff
[none]
Yola Byram
Reported: 11/11/2024 15:09
BCL Sample ID: 2416404-06 Client Sample Name:

Method Prep Date Date/Time
Run
Analyst Instrument Dilution Batch ID
QC
Volatile Organic Compounds by GC/MS (EPA Method TO-15 at STP) DCN
WB06-1H, 10/9/2024 11:42:00AM, Elizabeth Hwang/Olivia Hogan 1 EPA-TO-15-SIM 10/11/24 09:33 10/11/24 19:03 BEP MS-A2 1 B198723 EPA TO-15 2 EPA-TO-15-SIM 10/11/24 09:33 10/14/24 22:01 BEP MS-A2 10 B198806 EPA TO-15 DCN = Data Continuation Number
The results in this report apply to the samples analyzed in accordance with the chain of custody document. This analytical report must be reproduced in its entirety. All results listed in this report are for the exclusive use of the submitting party. Pace Analytical assumes no responsibility for report alteration, separation, detachment or third party interpretation. 4100 Atlas Court Bakersfield, CA 93308 (661) 327-4911 FAX (661) 327-1918 www.pacelabs.com Report ID: 1001550739 Page 23 of 50 Catalyst Environmental Solutions
315 Montana Ave Suite 311
Santa Monica, CA 90403
Project:

Project Number:

Project Manager:

Walnut Bluff
[none]
Yola Byram
Reported: 11/11/2024 15:09
Pace Sample ID: 2416404-08 Client Sample Name:

Constituent Result Units Method Bias Quals
MB Lab
Volatile Organic Compounds by GC/MS (EPA Method TO-15 at STP) DCN
WB08-1H, 10/9/2024 12:11:00PM, Elizabeth Hwang/Olivia Hogan

PQL MDL
Benzene 1.4 ug/m3 0.050 0.0032 EPA-TO-15-SIM ND 1
Benzyl chloride ND ug/m3 0.50 0.0052 EPA-TO-15-SIM ND 1 Carbon tetrachloride 0.50 ug/m3 0.20 0.0063 EPA-TO-15-SIM ND 1 Chlorobenzene ND ug/m3 0.10 0.0079 EPA-TO-15-SIM ND 1
Chloroform 0.21 ug/m3 0.050 0.0058 EPA-TO-15-SIM ND 1
1,2-Dibromoethane ND ug/m3 0.20 0.014 EPA-TO-15-SIM ND 1 1,2-Dichlorobenzene ND ug/m3 0.20 0.011 EPA-TO-15-SIM ND 1 1,3-Dichlorobenzene ND ug/m3 0.20 0.013 EPA-TO-15-SIM ND 1 1,4-Dichlorobenzene 0.086 ug/m3 0.20 0.016 EPA-TO-15-SIM ND J 1 Dichlorodifluoromethane 2.3 ug/m3 0.050 0.0052 EPA-TO-15-SIM ND 1 1,1-Dichloroethane ND ug/m3 0.050 0.0041 EPA-TO-15-SIM ND 1 1,2-Dichloroethane 0.088 ug/m3 0.10 0.0046 EPA-TO-15-SIM ND J 1 1,1-Dichloroethene ND ug/m3 0.050 0.0078 EPA-TO-15-SIM ND 1 cis-1,2-Dichloroethene ND ug/m3 0.050 0.0044 EPA-TO-15-SIM ND 1 trans-1,2-Dichloroethene ND ug/m3 0.050 0.0075 EPA-TO-15-SIM ND 1 trans-1,3-Dichloropropene ND ug/m3 0.050 0.013 EPA-TO-15-SIM ND 1 1,1-Difluoroethane 1.1 ug/m3 5.0 0.0027 EPA-TO-15-SIM ND J 1 Ethylbenzene 0.56 ug/m3 0.050 0.017 EPA-TO-15-SIM ND 1
Naphthalene 0.16 ug/m3 0.20 0.020 EPA-TO-15-SIM ND J 1
Tetrachloroethene ND ug/m3 0.10 0.011 EPA-TO-15-SIM ND 1 Toluene 2.6 ug/m3 1.0 0.062 EPA-TO-15-SIM ND 2
1,1,1-Trichloroethane ND ug/m3 0.10 0.0055 EPA-TO-15-SIM ND 1 1,1,2-Trichloroethane ND ug/m3 0.10 0.0055 EPA-TO-15-SIM ND 1 Trichloroethene ND ug/m3 0.10 0.0095 EPA-TO-15-SIM ND 1 Trichlorofluoromethane 1.3 ug/m3 0.050 0.0057 EPA-TO-15-SIM ND 1 1,1,2-Trichloro-1,2,2-trifluoroethane 0.53 ug/m3 0.10 0.0078 EPA-TO-15-SIM ND 1 Vinyl chloride ND ug/m3 0.020 0.0046 EPA-TO-15-SIM ND 1 p- & m-Xylenes 1.7 ug/m3 0.050 0.0082 EPA-TO-15-SIM ND 1 o-Xylene 0.62 ug/m3 0.050 0.0044 EPA-TO-15-SIM ND 1
Total Xylenes 2.3 ug/m3 0.10 0.013 EPA-TO-15-SIM ND 1
4-Bromofluorobenzene (Surrogate) 108 % 50 - 150 (LCL - UCL) EPA-TO-15-SIM 1 4-Bromofluorobenzene (Surrogate) 108 % 50 - 150 (LCL - UCL) EPA-TO-15-SIM 1 4-Bromofluorobenzene (Surrogate) 82.7 % 50 - 150 (LCL - UCL) EPA-TO-15-SIM 2 The results in this report apply to the samples analyzed in accordance with the chain of custody document. This analytical report must be reproduced in its entirety. All results listed in this report are for the exclusive use of the submitting party. Pace Analytical assumes no responsibility for report alteration, separation, detachment or third party interpretation. 4100 Atlas Court Bakersfield, CA 93308 (661) 327-4911 FAX (661) 327-1918 www.pacelabs.com Report ID: 1001550739 Page 24 of 50 Catalyst Environmental Solutions
315 Montana Ave Suite 311
Santa Monica, CA 90403
Project:

Project Number:

Project Manager:

Walnut Bluff
[none]
Yola Byram
Reported: 11/11/2024 15:09
BCL Sample ID: 2416404-08 Client Sample Name:

Method Prep Date Date/Time
Run
Analyst Instrument Dilution Batch ID
QC
Volatile Organic Compounds by GC/MS (EPA Method TO-15 at STP) DCN
WB08-1H, 10/9/2024 12:11:00PM, Elizabeth Hwang/Olivia Hogan 1 EPA-TO-15-SIM 10/11/24 09:33 10/11/24 19:49 BEP MS-A2 1 B198723 EPA TO-15 2 EPA-TO-15-SIM 10/11/24 09:33 10/14/24 22:43 BEP MS-A2 10 B198806 EPA TO-15 DCN = Data Continuation Number
The results in this report apply to the samples analyzed in accordance with the chain of custody document. This analytical report must be reproduced in its entirety. All results listed in this report are for the exclusive use of the submitting party. Pace Analytical assumes no responsibility for report alteration, separation, detachment or third party interpretation. 4100 Atlas Court Bakersfield, CA 93308 (661) 327-4911 FAX (661) 327-1918 www.pacelabs.com Report ID: 1001550739 Page 25 of 50 Catalyst Environmental Solutions
315 Montana Ave Suite 311
Santa Monica, CA 90403
Project:

Project Number:

Project Manager:

Walnut Bluff
[none]
Yola Byram
Reported: 11/11/2024 15:09
Pace Sample ID: 2416404-09 Client Sample Name:

Constituent Result Units Method Bias Quals
MB Lab
Volatile Organic Compounds by GC/MS (EPA Method TO-15 at STP) DCN
WB09-1H, 10/9/2024 12:24:00PM, Elizabeth Hwang/Olivia Hogan

PQL MDL
Benzene 1.3 ug/m3 0.050 0.0032 EPA-TO-15-SIM ND 1
Benzyl chloride ND ug/m3 0.50 0.0052 EPA-TO-15-SIM ND 1 Carbon tetrachloride 0.50 ug/m3 0.20 0.0063 EPA-TO-15-SIM ND 1 Chlorobenzene ND ug/m3 0.10 0.0079 EPA-TO-15-SIM ND 1
Chloroform 0.22 ug/m3 0.050 0.0058 EPA-TO-15-SIM ND 1
1,2-Dibromoethane ND ug/m3 0.20 0.014 EPA-TO-15-SIM ND 1 1,2-Dichlorobenzene ND ug/m3 0.20 0.011 EPA-TO-15-SIM ND 1 1,3-Dichlorobenzene ND ug/m3 0.20 0.013 EPA-TO-15-SIM ND 1 1,4-Dichlorobenzene 0.093 ug/m3 0.20 0.016 EPA-TO-15-SIM ND J 1 Dichlorodifluoromethane 2.4 ug/m3 0.050 0.0052 EPA-TO-15-SIM ND 1 1,1-Dichloroethane ND ug/m3 0.050 0.0041 EPA-TO-15-SIM ND 1 1,2-Dichloroethane 0.086 ug/m3 0.10 0.0046 EPA-TO-15-SIM ND J 1 1,1-Dichloroethene ND ug/m3 0.050 0.0078 EPA-TO-15-SIM ND 1 cis-1,2-Dichloroethene ND ug/m3 0.050 0.0044 EPA-TO-15-SIM ND 1 trans-1,2-Dichloroethene ND ug/m3 0.050 0.0075 EPA-TO-15-SIM ND 1 trans-1,3-Dichloropropene ND ug/m3 0.050 0.013 EPA-TO-15-SIM ND 1 1,1-Difluoroethane 1.0 ug/m3 5.0 0.0027 EPA-TO-15-SIM ND J 1 Ethylbenzene 0.72 ug/m3 0.050 0.017 EPA-TO-15-SIM ND 1
Naphthalene 0.34 ug/m3 0.20 0.020 EPA-TO-15-SIM ND 1
Tetrachloroethene ND ug/m3 0.10 0.011 EPA-TO-15-SIM ND 1 Toluene 2.7 ug/m3 1.0 0.062 EPA-TO-15-SIM ND 2
1,1,1-Trichloroethane ND ug/m3 0.10 0.0055 EPA-TO-15-SIM ND 1 1,1,2-Trichloroethane ND ug/m3 0.10 0.0055 EPA-TO-15-SIM ND 1 Trichloroethene ND ug/m3 0.10 0.0095 EPA-TO-15-SIM ND 1 Trichlorofluoromethane 1.3 ug/m3 0.050 0.0057 EPA-TO-15-SIM ND 1 1,1,2-Trichloro-1,2,2-trifluoroethane 0.53 ug/m3 0.10 0.0078 EPA-TO-15-SIM ND 1 Vinyl chloride ND ug/m3 0.020 0.0046 EPA-TO-15-SIM ND 1 p- & m-Xylenes 2.4 ug/m3 0.050 0.0082 EPA-TO-15-SIM ND 1 o-Xylene 0.90 ug/m3 0.050 0.0044 EPA-TO-15-SIM ND 1
Total Xylenes 3.3 ug/m3 0.10 0.013 EPA-TO-15-SIM ND 1
4-Bromofluorobenzene (Surrogate) 109 % 50 - 150 (LCL - UCL) EPA-TO-15-SIM 1 4-Bromofluorobenzene (Surrogate) 109 % 50 - 150 (LCL - UCL) EPA-TO-15-SIM 1 4-Bromofluorobenzene (Surrogate) 93.3 % 50 - 150 (LCL - UCL) EPA-TO-15-SIM 2 The results in this report apply to the samples analyzed in accordance with the chain of custody document. This analytical report must be reproduced in its entirety. All results listed in this report are for the exclusive use of the submitting party. Pace Analytical assumes no responsibility for report alteration, separation, detachment or third party interpretation. 4100 Atlas Court Bakersfield, CA 93308 (661) 327-4911 FAX (661) 327-1918 www.pacelabs.com Report ID: 1001550739 Page 26 of 50 Catalyst Environmental Solutions
315 Montana Ave Suite 311
Santa Monica, CA 90403
Project:

Project Number:

Project Manager:

Walnut Bluff
[none]
Yola Byram
Reported: 11/11/2024 15:09
BCL Sample ID: 2416404-09 Client Sample Name:

Method Prep Date Date/Time
Run
Analyst Instrument Dilution Batch ID
QC
Volatile Organic Compounds by GC/MS (EPA Method TO-15 at STP) DCN
WB09-1H, 10/9/2024 12:24:00PM, Elizabeth Hwang/Olivia Hogan 1 EPA-TO-15-SIM 10/11/24 09:33 10/11/24 20:35 BEP MS-A2 1 B198723 EPA TO-15 2 EPA-TO-15-SIM 10/11/24 09:33 10/14/24 23:22 BEP MS-A2 10 B198806 EPA TO-15 DCN = Data Continuation Number
The results in this report apply to the samples analyzed in accordance with the chain of custody document. This analytical report must be reproduced in its entirety. All results listed in this report are for the exclusive use of the submitting party. Pace Analytical assumes no responsibility for report alteration, separation, detachment or third party interpretation. 4100 Atlas Court Bakersfield, CA 93308 (661) 327-4911 FAX (661) 327-1918 www.pacelabs.com Report ID: 1001550739 Page 27 of 50 Catalyst Environmental Solutions
315 Montana Ave Suite 311
Santa Monica, CA 90403
Project:

Project Number:

Project Manager:

Walnut Bluff
[none]
Yola Byram
Reported: 11/11/2024 15:09
Pace Sample ID: 2416404-10 Client Sample Name:

Constituent Result Units Method Bias Quals
MB Lab
Volatile Organic Compounds by GC/MS (EPA Method TO-15 at STP) DCN
WB10-1H, 10/9/2024 12:20:00PM, Elizabeth Hwang/Olivia Hogan

PQL MDL
Benzene 1.8 ug/m3 0.50 0.032 EPA-TO-15-SIM ND 1
Benzyl chloride ND ug/m3 0.50 0.0052 EPA-TO-15-SIM ND 2 Carbon tetrachloride 0.51 ug/m3 0.20 0.0063 EPA-TO-15-SIM ND 2 Chlorobenzene ND ug/m3 0.10 0.0079 EPA-TO-15-SIM ND 2
Chloroform 0.22 ug/m3 0.050 0.0058 EPA-TO-15-SIM ND 2
1,2-Dibromoethane ND ug/m3 0.20 0.014 EPA-TO-15-SIM ND 2 1,2-Dichlorobenzene ND ug/m3 0.20 0.011 EPA-TO-15-SIM ND 2 1,3-Dichlorobenzene ND ug/m3 0.20 0.013 EPA-TO-15-SIM ND 2 1,4-Dichlorobenzene 0.10 ug/m3 0.20 0.016 EPA-TO-15-SIM ND J 2 Dichlorodifluoromethane 2.4 ug/m3 0.050 0.0052 EPA-TO-15-SIM ND 2 1,1-Dichloroethane ND ug/m3 0.050 0.0041 EPA-TO-15-SIM ND 2 1,2-Dichloroethane 0.089 ug/m3 0.10 0.0046 EPA-TO-15-SIM ND J 2 1,1-Dichloroethene ND ug/m3 0.050 0.0078 EPA-TO-15-SIM ND 2 cis-1,2-Dichloroethene ND ug/m3 0.050 0.0044 EPA-TO-15-SIM ND 2 trans-1,2-Dichloroethene ND ug/m3 0.050 0.0075 EPA-TO-15-SIM ND 2 trans-1,3-Dichloropropene ND ug/m3 0.050 0.013 EPA-TO-15-SIM ND 2 1,1-Difluoroethane 1.1 ug/m3 5.0 0.0027 EPA-TO-15-SIM ND J 2 Ethylbenzene 0.61 ug/m3 0.050 0.017 EPA-TO-15-SIM ND 2
Naphthalene 0.25 ug/m3 0.20 0.020 EPA-TO-15-SIM ND 2
Tetrachloroethene ND ug/m3 0.10 0.011 EPA-TO-15-SIM ND 2 Toluene 7.2 ug/m3 1.0 0.062 EPA-TO-15-SIM ND 1
1,1,1-Trichloroethane ND ug/m3 0.10 0.0055 EPA-TO-15-SIM ND 2 1,1,2-Trichloroethane ND ug/m3 0.10 0.0055 EPA-TO-15-SIM ND 2 Trichloroethene ND ug/m3 0.10 0.0095 EPA-TO-15-SIM ND 2 Trichlorofluoromethane 1.3 ug/m3 0.050 0.0057 EPA-TO-15-SIM ND 2 1,1,2-Trichloro-1,2,2-trifluoroethane 0.52 ug/m3 0.10 0.0078 EPA-TO-15-SIM ND 2 Vinyl chloride ND ug/m3 0.020 0.0046 EPA-TO-15-SIM ND 2 p- & m-Xylenes 1.9 ug/m3 0.050 0.0082 EPA-TO-15-SIM ND 2 o-Xylene 0.64 ug/m3 0.050 0.0044 EPA-TO-15-SIM ND 2
Total Xylenes 2.5 ug/m3 0.10 0.013 EPA-TO-15-SIM ND 2
4-Bromofluorobenzene (Surrogate) 93.0 % 50 - 150 (LCL - UCL) EPA-TO-15-SIM 1 4-Bromofluorobenzene (Surrogate) 109 % 50 - 150 (LCL - UCL) EPA-TO-15-SIM 2 4-Bromofluorobenzene (Surrogate) 109 % 50 - 150 (LCL - UCL) EPA-TO-15-SIM 2 The results in this report apply to the samples analyzed in accordance with the chain of custody document. This analytical report must be reproduced in its entirety. All results listed in this report are for the exclusive use of the submitting party. Pace Analytical assumes no responsibility for report alteration, separation, detachment or third party interpretation. 4100 Atlas Court Bakersfield, CA 93308 (661) 327-4911 FAX (661) 327-1918 www.pacelabs.com Report ID: 1001550739 Page 28 of 50 Catalyst Environmental Solutions
315 Montana Ave Suite 311
Santa Monica, CA 90403
Project:

Project Number:

Project Manager:

Walnut Bluff
[none]
Yola Byram
Reported: 11/11/2024 15:09
BCL Sample ID: 2416404-10 Client Sample Name:

Method Prep Date Date/Time
Run
Analyst Instrument Dilution Batch ID
QC
Volatile Organic Compounds by GC/MS (EPA Method TO-15 at STP) DCN
WB10-1H, 10/9/2024 12:20:00PM, Elizabeth Hwang/Olivia Hogan 1 EPA-TO-15-SIM 10/11/24 09:33 10/15/24 00:03 BEP MS-A2 10 B198806 EPA TO-15 2 EPA-TO-15-SIM 10/11/24 09:33 10/11/24 21:21 BEP MS-A2 1 B198723 EPA TO-15 DCN = Data Continuation Number
The results in this report apply to the samples analyzed in accordance with the chain of custody document. This analytical report must be reproduced in its entirety. All results listed in this report are for the exclusive use of the submitting party. Pace Analytical assumes no responsibility for report alteration, separation, detachment or third party interpretation. 4100 Atlas Court Bakersfield, CA 93308 (661) 327-4911 FAX (661) 327-1918 www.pacelabs.com Report ID: 1001550739 Page 29 of 50 Catalyst Environmental Solutions
315 Montana Ave Suite 311
Santa Monica, CA 90403
Project:

Project Number:

Project Manager:

Walnut Bluff
[none]
Yola Byram
Reported: 11/11/2024 15:09
Pace Sample ID: 2416404-11 Client Sample Name:

Constituent Result Units Method Bias Quals
MB Lab
Volatile Organic Compounds by GC/MS (EPA Method TO-15 at STP) DCN
WB11-1H, 10/9/2024 12:51:00PM, Elizabeth Hwang/Olivia Hogan

PQL MDL
Benzene 1.8 ug/m3 0.50 0.032 EPA-TO-15-SIM ND 1
Benzyl chloride ND ug/m3 0.50 0.0052 EPA-TO-15-SIM ND 2 Carbon tetrachloride 0.50 ug/m3 0.20 0.0063 EPA-TO-15-SIM ND 2 Chlorobenzene ND ug/m3 0.10 0.0079 EPA-TO-15-SIM ND 2
Chloroform 0.19 ug/m3 0.050 0.0058 EPA-TO-15-SIM ND 2
1,2-Dibromoethane ND ug/m3 0.20 0.014 EPA-TO-15-SIM ND 2 1,2-Dichlorobenzene ND ug/m3 0.20 0.011 EPA-TO-15-SIM ND 2 1,3-Dichlorobenzene ND ug/m3 0.20 0.013 EPA-TO-15-SIM ND 2 1,4-Dichlorobenzene 0.11 ug/m3 0.20 0.016 EPA-TO-15-SIM ND J 2 Dichlorodifluoromethane 2.3 ug/m3 0.050 0.0052 EPA-TO-15-SIM ND 2 1,1-Dichloroethane ND ug/m3 0.050 0.0041 EPA-TO-15-SIM ND 2 1,2-Dichloroethane 0.10 ug/m3 0.10 0.0046 EPA-TO-15-SIM ND 2 1,1-Dichloroethene ND ug/m3 0.050 0.0078 EPA-TO-15-SIM ND 2 cis-1,2-Dichloroethene ND ug/m3 0.050 0.0044 EPA-TO-15-SIM ND 2 trans-1,2-Dichloroethene ND ug/m3 0.050 0.0075 EPA-TO-15-SIM ND 2 trans-1,3-Dichloropropene ND ug/m3 0.050 0.013 EPA-TO-15-SIM ND 2 1,1-Difluoroethane 0.89 ug/m3 5.0 0.0027 EPA-TO-15-SIM ND J 2 Ethylbenzene 0.67 ug/m3 0.050 0.017 EPA-TO-15-SIM ND 2
Naphthalene 0.31 ug/m3 0.20 0.020 EPA-TO-15-SIM ND 2
Tetrachloroethene 0.077 ug/m3 0.10 0.011 EPA-TO-15-SIM ND J 2 Toluene 2.8 ug/m3 1.0 0.062 EPA-TO-15-SIM ND 1
1,1,1-Trichloroethane ND ug/m3 0.10 0.0055 EPA-TO-15-SIM ND 2 1,1,2-Trichloroethane ND ug/m3 0.10 0.0055 EPA-TO-15-SIM ND 2 Trichloroethene ND ug/m3 0.10 0.0095 EPA-TO-15-SIM ND 2 Trichlorofluoromethane 1.3 ug/m3 0.050 0.0057 EPA-TO-15-SIM ND 2 1,1,2-Trichloro-1,2,2-trifluoroethane 0.52 ug/m3 0.10 0.0078 EPA-TO-15-SIM ND 2 Vinyl chloride ND ug/m3 0.020 0.0046 EPA-TO-15-SIM ND 2 p- & m-Xylenes 2.1 ug/m3 0.050 0.0082 EPA-TO-15-SIM ND 2 o-Xylene 0.75 ug/m3 0.050 0.0044 EPA-TO-15-SIM ND 2
Total Xylenes 2.8 ug/m3 0.10 0.013 EPA-TO-15-SIM ND 2
4-Bromofluorobenzene (Surrogate) 95.3 % 50 - 150 (LCL - UCL) EPA-TO-15-SIM 1 4-Bromofluorobenzene (Surrogate) 115 % 50 - 150 (LCL - UCL) EPA-TO-15-SIM 2 4-Bromofluorobenzene (Surrogate) 115 % 50 - 150 (LCL - UCL) EPA-TO-15-SIM 2 The results in this report apply to the samples analyzed in accordance with the chain of custody document. This analytical report must be reproduced in its entirety. All results listed in this report are for the exclusive use of the submitting party. Pace Analytical assumes no responsibility for report alteration, separation, detachment or third party interpretation. 4100 Atlas Court Bakersfield, CA 93308 (661) 327-4911 FAX (661) 327-1918 www.pacelabs.com Report ID: 1001550739 Page 30 of 50 Catalyst Environmental Solutions
315 Montana Ave Suite 311
Santa Monica, CA 90403
Project:

Project Number:

Project Manager:

Walnut Bluff
[none]
Yola Byram
Reported: 11/11/2024 15:09
BCL Sample ID: 2416404-11 Client Sample Name:

Method Prep Date Date/Time
Run
Analyst Instrument Dilution Batch ID
QC
Volatile Organic Compounds by GC/MS (EPA Method TO-15 at STP) DCN
WB11-1H, 10/9/2024 12:51:00PM, Elizabeth Hwang/Olivia Hogan 1 EPA-TO-15-SIM 10/11/24 09:33 10/15/24 00:42 BEP MS-A2 10 B198806 EPA TO-15 2 EPA-TO-15-SIM 10/11/24 09:33 10/11/24 22:08 BEP MS-A2 1 B198723 EPA TO-15 DCN = Data Continuation Number
The results in this report apply to the samples analyzed in accordance with the chain of custody document. This analytical report must be reproduced in its entirety. All results listed in this report are for the exclusive use of the submitting party. Pace Analytical assumes no responsibility for report alteration, separation, detachment or third party interpretation. 4100 Atlas Court Bakersfield, CA 93308 (661) 327-4911 FAX (661) 327-1918 www.pacelabs.com Report ID: 1001550739 Page 31 of 50 Catalyst Environmental Solutions
315 Montana Ave Suite 311
Santa Monica, CA 90403
Project:

Project Number:

Project Manager:

Walnut Bluff
[none]
Yola Byram
Reported: 11/11/2024 15:09
Pace Sample ID: 2416404-12 Client Sample Name:

Constituent Result Units Method Bias Quals
MB Lab
Volatile Organic Compounds by GC/MS (EPA Method TO-15 at STP) DCN
WB12-1H, 10/9/2024 12:58:00PM, Elizabeth Hwang/Olivia Hogan

PQL MDL
Benzene 1.7 ug/m3 0.50 0.032 EPA-TO-15-SIM ND 1
Benzyl chloride ND ug/m3 0.50 0.0052 EPA-TO-15-SIM ND 2 Carbon tetrachloride 0.50 ug/m3 0.20 0.0063 EPA-TO-15-SIM ND 2 Chlorobenzene ND ug/m3 0.10 0.0079 EPA-TO-15-SIM ND 2
Chloroform 0.20 ug/m3 0.050 0.0058 EPA-TO-15-SIM ND 2
1,2-Dibromoethane ND ug/m3 0.20 0.014 EPA-TO-15-SIM ND 2 1,2-Dichlorobenzene ND ug/m3 0.20 0.011 EPA-TO-15-SIM ND 2 1,3-Dichlorobenzene ND ug/m3 0.20 0.013 EPA-TO-15-SIM ND 2 1,4-Dichlorobenzene 0.085 ug/m3 0.20 0.016 EPA-TO-15-SIM ND J 2 Dichlorodifluoromethane 2.4 ug/m3 0.050 0.0052 EPA-TO-15-SIM ND 2 1,1-Dichloroethane ND ug/m3 0.050 0.0041 EPA-TO-15-SIM ND 2 1,2-Dichloroethane 0.10 ug/m3 0.10 0.0046 EPA-TO-15-SIM ND 2 1,1-Dichloroethene ND ug/m3 0.050 0.0078 EPA-TO-15-SIM ND 2 cis-1,2-Dichloroethene ND ug/m3 0.050 0.0044 EPA-TO-15-SIM ND 2 trans-1,2-Dichloroethene ND ug/m3 0.050 0.0075 EPA-TO-15-SIM ND 2 trans-1,3-Dichloropropene ND ug/m3 0.050 0.013 EPA-TO-15-SIM ND 2 1,1-Difluoroethane 1.7 ug/m3 5.0 0.0027 EPA-TO-15-SIM ND J 2 Ethylbenzene 0.80 ug/m3 0.050 0.017 EPA-TO-15-SIM ND 2
Naphthalene 0.30 ug/m3 0.20 0.020 EPA-TO-15-SIM ND 2
Tetrachloroethene 0.072 ug/m3 0.10 0.011 EPA-TO-15-SIM ND J 2 Toluene 3.0 ug/m3 1.0 0.062 EPA-TO-15-SIM ND 1
1,1,1-Trichloroethane ND ug/m3 0.10 0.0055 EPA-TO-15-SIM ND 2 1,1,2-Trichloroethane ND ug/m3 0.10 0.0055 EPA-TO-15-SIM ND 2 Trichloroethene ND ug/m3 0.10 0.0095 EPA-TO-15-SIM ND 2 Trichlorofluoromethane 1.3 ug/m3 0.050 0.0057 EPA-TO-15-SIM ND 2 1,1,2-Trichloro-1,2,2-trifluoroethane 0.53 ug/m3 0.10 0.0078 EPA-TO-15-SIM ND 2 Vinyl chloride ND ug/m3 0.020 0.0046 EPA-TO-15-SIM ND 2 p- & m-Xylenes 2.6 ug/m3 0.050 0.0082 EPA-TO-15-SIM ND 2 o-Xylene 0.92 ug/m3 0.050 0.0044 EPA-TO-15-SIM ND 2
Total Xylenes 3.5 ug/m3 0.10 0.013 EPA-TO-15-SIM ND 2
4-Bromofluorobenzene (Surrogate) 94.1 % 50 - 150 (LCL - UCL) EPA-TO-15-SIM 1 4-Bromofluorobenzene (Surrogate) 107 % 50 - 150 (LCL - UCL) EPA-TO-15-SIM 2 4-Bromofluorobenzene (Surrogate) 107 % 50 - 150 (LCL - UCL) EPA-TO-15-SIM 2 The results in this report apply to the samples analyzed in accordance with the chain of custody document. This analytical report must be reproduced in its entirety. All results listed in this report are for the exclusive use of the submitting party. Pace Analytical assumes no responsibility for report alteration, separation, detachment or third party interpretation. 4100 Atlas Court Bakersfield, CA 93308 (661) 327-4911 FAX (661) 327-1918 www.pacelabs.com Report ID: 1001550739 Page 32 of 50 Catalyst Environmental Solutions
315 Montana Ave Suite 311
Santa Monica, CA 90403
Project:

Project Number:

Project Manager:

Walnut Bluff
[none]
Yola Byram
Reported: 11/11/2024 15:09
BCL Sample ID: 2416404-12 Client Sample Name:

Method Prep Date Date/Time
Run
Analyst Instrument Dilution Batch ID
QC
Volatile Organic Compounds by GC/MS (EPA Method TO-15 at STP) DCN
WB12-1H, 10/9/2024 12:58:00PM, Elizabeth Hwang/Olivia Hogan 1 EPA-TO-15-SIM 10/11/24 09:33 10/15/24 01:22 BEP MS-A2 10 B198806 EPA TO-15 2 EPA-TO-15-SIM 10/11/24 09:33 10/11/24 22:54 BEP MS-A2 1 B198723 EPA TO-15 DCN = Data Continuation Number
The results in this report apply to the samples analyzed in accordance with the chain of custody document. This analytical report must be reproduced in its entirety. All results listed in this report are for the exclusive use of the submitting party. Pace Analytical assumes no responsibility for report alteration, separation, detachment or third party interpretation. 4100 Atlas Court Bakersfield, CA 93308 (661) 327-4911 FAX (661) 327-1918 www.pacelabs.com Report ID: 1001550739 Page 33 of 50 Catalyst Environmental Solutions
315 Montana Ave Suite 311
Santa Monica, CA 90403
Project:

Project Number:

Project Manager:

Walnut Bluff
[none]
Yola Byram
Reported: 11/11/2024 15:09
Pace Sample ID: 2416404-13 Client Sample Name:

Constituent Result Units Method Bias Quals
MB Lab
Volatile Organic Compounds by GC/MS (EPA Method TO-15 at STP) DCN
WB13-1H, 10/9/2024 10:09:00AM, Elizabeth Hwang/Olivia Hogan

PQL MDL
Benzene 1.9 ug/m3 0.50 0.032 EPA-TO-15-SIM ND 1
Benzyl chloride ND ug/m3 0.50 0.0052 EPA-TO-15-SIM ND 2 Carbon tetrachloride 0.50 ug/m3 0.20 0.0063 EPA-TO-15-SIM ND 2 Chlorobenzene ND ug/m3 0.10 0.0079 EPA-TO-15-SIM ND 2
Chloroform 0.22 ug/m3 0.050 0.0058 EPA-TO-15-SIM ND 2
1,2-Dibromoethane ND ug/m3 0.20 0.014 EPA-TO-15-SIM ND 2 1,2-Dichlorobenzene ND ug/m3 0.20 0.011 EPA-TO-15-SIM ND 2 1,3-Dichlorobenzene ND ug/m3 0.20 0.013 EPA-TO-15-SIM ND 2 1,4-Dichlorobenzene 0.093 ug/m3 0.20 0.016 EPA-TO-15-SIM ND J 2 Dichlorodifluoromethane 2.3 ug/m3 0.050 0.0052 EPA-TO-15-SIM ND 2 1,1-Dichloroethane ND ug/m3 0.050 0.0041 EPA-TO-15-SIM ND 2 1,2-Dichloroethane 0.11 ug/m3 0.10 0.0046 EPA-TO-15-SIM ND 2 1,1-Dichloroethene ND ug/m3 0.050 0.0078 EPA-TO-15-SIM ND 2 cis-1,2-Dichloroethene ND ug/m3 0.050 0.0044 EPA-TO-15-SIM ND 2 trans-1,2-Dichloroethene ND ug/m3 0.050 0.0075 EPA-TO-15-SIM ND 2 trans-1,3-Dichloropropene ND ug/m3 0.050 0.013 EPA-TO-15-SIM ND 2 1,1-Difluoroethane 0.98 ug/m3 5.0 0.0027 EPA-TO-15-SIM ND J 2 Ethylbenzene 0.57 ug/m3 0.050 0.017 EPA-TO-15-SIM ND 2
Naphthalene 0.24 ug/m3 0.20 0.020 EPA-TO-15-SIM ND 2
Tetrachloroethene ND ug/m3 0.10 0.011 EPA-TO-15-SIM ND 2 Toluene 2.9 ug/m3 1.0 0.062 EPA-TO-15-SIM ND 1
1,1,1-Trichloroethane ND ug/m3 0.10 0.0055 EPA-TO-15-SIM ND 2 1,1,2-Trichloroethane ND ug/m3 0.10 0.0055 EPA-TO-15-SIM ND 2 Trichloroethene ND ug/m3 0.10 0.0095 EPA-TO-15-SIM ND 2 Trichlorofluoromethane 1.2 ug/m3 0.050 0.0057 EPA-TO-15-SIM ND 2 1,1,2-Trichloro-1,2,2-trifluoroethane 0.52 ug/m3 0.10 0.0078 EPA-TO-15-SIM ND 2 Vinyl chloride ND ug/m3 0.020 0.0046 EPA-TO-15-SIM ND 2 p- & m-Xylenes 1.9 ug/m3 0.050 0.0082 EPA-TO-15-SIM ND 2 o-Xylene 0.65 ug/m3 0.050 0.0044 EPA-TO-15-SIM ND 2
Total Xylenes 2.6 ug/m3 0.10 0.013 EPA-TO-15-SIM ND 2
4-Bromofluorobenzene (Surrogate) 84.6 % 50 - 150 (LCL - UCL) EPA-TO-15-SIM 1 4-Bromofluorobenzene (Surrogate) 111 % 50 - 150 (LCL - UCL) EPA-TO-15-SIM 2 4-Bromofluorobenzene (Surrogate) 111 % 50 - 150 (LCL - UCL) EPA-TO-15-SIM 2 The results in this report apply to the samples analyzed in accordance with the chain of custody document. This analytical report must be reproduced in its entirety. All results listed in this report are for the exclusive use of the submitting party. Pace Analytical assumes no responsibility for report alteration, separation, detachment or third party interpretation. 4100 Atlas Court Bakersfield, CA 93308 (661) 327-4911 FAX (661) 327-1918 www.pacelabs.com Report ID: 1001550739 Page 34 of 50 Catalyst Environmental Solutions
315 Montana Ave Suite 311
Santa Monica, CA 90403
Project:

Project Number:

Project Manager:

Walnut Bluff
[none]
Yola Byram
Reported: 11/11/2024 15:09
BCL Sample ID: 2416404-13 Client Sample Name:

Method Prep Date Date/Time
Run
Analyst Instrument Dilution Batch ID
QC
Volatile Organic Compounds by GC/MS (EPA Method TO-15 at STP) DCN
WB13-1H, 10/9/2024 10:09:00AM, Elizabeth Hwang/Olivia Hogan 1 EPA-TO-15-SIM 10/11/24 09:33 10/15/24 02:04 BEP MS-A2 10 B198806 EPA TO-15 2 EPA-TO-15-SIM 10/11/24 09:33 10/11/24 23:40 BEP MS-A2 1 B198723 EPA TO-15 DCN = Data Continuation Number
The results in this report apply to the samples analyzed in accordance with the chain of custody document. This analytical report must be reproduced in its entirety. All results listed in this report are for the exclusive use of the submitting party. Pace Analytical assumes no responsibility for report alteration, separation, detachment or third party interpretation. 4100 Atlas Court Bakersfield, CA 93308 (661) 327-4911 FAX (661) 327-1918 www.pacelabs.com Report ID: 1001550739 Page 35 of 50 Catalyst Environmental Solutions
315 Montana Ave Suite 311
Santa Monica, CA 90403
Project:

Project Number:

Project Manager:

Walnut Bluff
[none]
Yola Byram
Reported: 11/11/2024 15:09
Pace Sample ID: 2416404-14 Client Sample Name:

Constituent Result Units Method Bias Quals
MB Lab
Volatile Organic Compounds by GC/MS (EPA Method TO-15 at STP) DCN
WB14-1H, 10/9/2024 10:19:00AM, Elizabeth Hwang/Olivia Hogan

PQL MDL
Benzene 1.9 ug/m3 0.50 0.032 EPA-TO-15-SIM ND 1
Benzyl chloride ND ug/m3 0.50 0.0052 EPA-TO-15-SIM ND 2 Carbon tetrachloride 0.50 ug/m3 0.20 0.0063 EPA-TO-15-SIM ND 2 Chlorobenzene ND ug/m3 0.10 0.0079 EPA-TO-15-SIM ND 2
Chloroform 0.24 ug/m3 0.050 0.0058 EPA-TO-15-SIM ND 2
1,2-Dibromoethane ND ug/m3 0.20 0.014 EPA-TO-15-SIM ND 2 1,2-Dichlorobenzene ND ug/m3 0.20 0.011 EPA-TO-15-SIM ND 2 1,3-Dichlorobenzene ND ug/m3 0.20 0.013 EPA-TO-15-SIM ND 2 1,4-Dichlorobenzene 0.097 ug/m3 0.20 0.016 EPA-TO-15-SIM ND J 2 Dichlorodifluoromethane 2.3 ug/m3 0.050 0.0052 EPA-TO-15-SIM ND 2 1,1-Dichloroethane ND ug/m3 0.050 0.0041 EPA-TO-15-SIM ND 2 1,2-Dichloroethane 0.11 ug/m3 0.10 0.0046 EPA-TO-15-SIM ND 2 1,1-Dichloroethene ND ug/m3 0.050 0.0078 EPA-TO-15-SIM ND 2 cis-1,2-Dichloroethene ND ug/m3 0.050 0.0044 EPA-TO-15-SIM ND 2 trans-1,2-Dichloroethene ND ug/m3 0.050 0.0075 EPA-TO-15-SIM ND 2 trans-1,3-Dichloropropene ND ug/m3 0.050 0.013 EPA-TO-15-SIM ND 2 1,1-Difluoroethane 0.99 ug/m3 5.0 0.0027 EPA-TO-15-SIM ND J 2 Ethylbenzene 0.58 ug/m3 0.050 0.017 EPA-TO-15-SIM ND 2
Naphthalene 0.23 ug/m3 0.20 0.020 EPA-TO-15-SIM ND 2
Tetrachloroethene ND ug/m3 0.10 0.011 EPA-TO-15-SIM ND 2 Toluene 3.2 ug/m3 1.0 0.062 EPA-TO-15-SIM ND 1
1,1,1-Trichloroethane ND ug/m3 0.10 0.0055 EPA-TO-15-SIM ND 2 1,1,2-Trichloroethane ND ug/m3 0.10 0.0055 EPA-TO-15-SIM ND 2 Trichloroethene ND ug/m3 0.10 0.0095 EPA-TO-15-SIM ND 2 Trichlorofluoromethane 1.2 ug/m3 0.050 0.0057 EPA-TO-15-SIM ND 2 1,1,2-Trichloro-1,2,2-trifluoroethane 0.52 ug/m3 0.10 0.0078 EPA-TO-15-SIM ND 2 Vinyl chloride ND ug/m3 0.020 0.0046 EPA-TO-15-SIM ND 2 p- & m-Xylenes 2.0 ug/m3 0.050 0.0082 EPA-TO-15-SIM ND 2 o-Xylene 0.68 ug/m3 0.050 0.0044 EPA-TO-15-SIM ND 2
Total Xylenes 2.7 ug/m3 0.10 0.013 EPA-TO-15-SIM ND 2
4-Bromofluorobenzene (Surrogate) 85.8 % 50 - 150 (LCL - UCL) EPA-TO-15-SIM 1 4-Bromofluorobenzene (Surrogate) 109 % 50 - 150 (LCL - UCL) EPA-TO-15-SIM 2 4-Bromofluorobenzene (Surrogate) 109 % 50 - 150 (LCL - UCL) EPA-TO-15-SIM 2 The results in this report apply to the samples analyzed in accordance with the chain of custody document. This analytical report must be reproduced in its entirety. All results listed in this report are for the exclusive use of the submitting party. Pace Analytical assumes no responsibility for report alteration, separation, detachment or third party interpretation. 4100 Atlas Court Bakersfield, CA 93308 (661) 327-4911 FAX (661) 327-1918 www.pacelabs.com Report ID: 1001550739 Page 36 of 50 Catalyst Environmental Solutions
315 Montana Ave Suite 311
Santa Monica, CA 90403
Project:

Project Number:

Project Manager:

Walnut Bluff
[none]
Yola Byram
Reported: 11/11/2024 15:09
BCL Sample ID: 2416404-14 Client Sample Name:

Method Prep Date Date/Time
Run
Analyst Instrument Dilution Batch ID
QC
Volatile Organic Compounds by GC/MS (EPA Method TO-15 at STP) DCN
WB14-1H, 10/9/2024 10:19:00AM, Elizabeth Hwang/Olivia Hogan 1 EPA-TO-15-SIM 10/11/24 09:33 10/15/24 02:45 BEP MS-A2 10 B198806 EPA TO-15 2 EPA-TO-15-SIM 10/11/24 09:33 10/12/24 00:27 BEP MS-A2 1 B198723 EPA TO-15 DCN = Data Continuation Number
The results in this report apply to the samples analyzed in accordance with the chain of custody document. This analytical report must be reproduced in its entirety. All results listed in this report are for the exclusive use of the submitting party. Pace Analytical assumes no responsibility for report alteration, separation, detachment or third party interpretation. 4100 Atlas Court Bakersfield, CA 93308 (661) 327-4911 FAX (661) 327-1918 www.pacelabs.com Report ID: 1001550739 Page 37 of 50 Catalyst Environmental Solutions
315 Montana Ave Suite 311
Santa Monica, CA 90403
Project:

Project Number:

Project Manager:

Walnut Bluff
[none]
Yola Byram
Reported: 11/11/2024 15:09
Pace Sample ID: 2416404-15 Client Sample Name:

Constituent Result Units Method Bias Quals
MB Lab
Volatile Organic Compounds by GC/MS (EPA Method TO-15 at STP) DCN
WB17-1H, 10/9/2024 2:37:00PM, Elizabeth Hwang/Olivia Hogan

PQL MDL
Benzene 0.88 ug/m3 0.050 0.0032 EPA-TO-15-SIM ND 1
Benzyl chloride ND ug/m3 0.50 0.0052 EPA-TO-15-SIM ND 1 Carbon tetrachloride 0.50 ug/m3 0.20 0.0063 EPA-TO-15-SIM ND 1 Chlorobenzene ND ug/m3 0.10 0.0079 EPA-TO-15-SIM ND 1
Chloroform 0.19 ug/m3 0.050 0.0058 EPA-TO-15-SIM ND 1
1,2-Dibromoethane ND ug/m3 0.20 0.014 EPA-TO-15-SIM ND 1 1,2-Dichlorobenzene ND ug/m3 0.20 0.011 EPA-TO-15-SIM ND 1 1,3-Dichlorobenzene ND ug/m3 0.20 0.013 EPA-TO-15-SIM ND 1 1,4-Dichlorobenzene 0.080 ug/m3 0.20 0.016 EPA-TO-15-SIM ND J 1 Dichlorodifluoromethane 2.4 ug/m3 0.050 0.0052 EPA-TO-15-SIM ND 1 1,1-Dichloroethane ND ug/m3 0.050 0.0041 EPA-TO-15-SIM ND 1 1,2-Dichloroethane 0.070 ug/m3 0.10 0.0046 EPA-TO-15-SIM ND J 1 1,1-Dichloroethene ND ug/m3 0.050 0.0078 EPA-TO-15-SIM ND 1 cis-1,2-Dichloroethene ND ug/m3 0.050 0.0044 EPA-TO-15-SIM ND 1 trans-1,2-Dichloroethene ND ug/m3 0.050 0.0075 EPA-TO-15-SIM ND 1 trans-1,3-Dichloropropene ND ug/m3 0.050 0.013 EPA-TO-15-SIM ND 1 1,1-Difluoroethane 0.67 ug/m3 5.0 0.0027 EPA-TO-15-SIM ND J 1 Ethylbenzene 0.61 ug/m3 0.050 0.017 EPA-TO-15-SIM ND 1
Naphthalene 0.18 ug/m3 0.20 0.020 EPA-TO-15-SIM ND J 1
Tetrachloroethene 0.074 ug/m3 0.10 0.011 EPA-TO-15-SIM ND J 1 Toluene 1.7 ug/m3 0.10 0.0062 EPA-TO-15-SIM ND 1
1,1,1-Trichloroethane ND ug/m3 0.10 0.0055 EPA-TO-15-SIM ND 1 1,1,2-Trichloroethane ND ug/m3 0.10 0.0055 EPA-TO-15-SIM ND 1 Trichloroethene ND ug/m3 0.10 0.0095 EPA-TO-15-SIM ND 1 Trichlorofluoromethane 1.3 ug/m3 0.050 0.0057 EPA-TO-15-SIM ND 1 1,1,2-Trichloro-1,2,2-trifluoroethane 0.53 ug/m3 0.10 0.0078 EPA-TO-15-SIM ND 1 Vinyl chloride ND ug/m3 0.020 0.0046 EPA-TO-15-SIM ND 1 p- & m-Xylenes 2.0 ug/m3 0.050 0.0082 EPA-TO-15-SIM ND 1 o-Xylene 0.67 ug/m3 0.050 0.0044 EPA-TO-15-SIM ND 1
Total Xylenes 2.6 ug/m3 0.10 0.013 EPA-TO-15-SIM ND 1
4-Bromofluorobenzene (Surrogate) 107 % 50 - 150 (LCL - UCL) EPA-TO-15-SIM 1 4-Bromofluorobenzene (Surrogate) 107 % 50 - 150 (LCL - UCL) EPA-TO-15-SIM 1 The results in this report apply to the samples analyzed in accordance with the chain of custody document. This analytical report must be reproduced in its entirety. All results listed in this report are for the exclusive use of the submitting party. Pace Analytical assumes no responsibility for report alteration, separation, detachment or third party interpretation. 4100 Atlas Court Bakersfield, CA 93308 (661) 327-4911 FAX (661) 327-1918 www.pacelabs.com Report ID: 1001550739 Page 38 of 50 Catalyst Environmental Solutions
315 Montana Ave Suite 311
Santa Monica, CA 90403
Project:

Project Number:

Project Manager:

Walnut Bluff
[none]
Yola Byram
Reported: 11/11/2024 15:09
BCL Sample ID: 2416404-15 Client Sample Name:

Method Prep Date Date/Time
Run
Analyst Instrument Dilution Batch ID
QC
Volatile Organic Compounds by GC/MS (EPA Method TO-15 at STP) DCN
WB17-1H, 10/9/2024 2:37:00PM, Elizabeth Hwang/Olivia Hogan 1 EPA-TO-15-SIM 10/11/24 09:33 10/12/24 01:13 BEP MS-A2 1 B198723 EPA TO-15 DCN = Data Continuation Number
The results in this report apply to the samples analyzed in accordance with the chain of custody document. This analytical report must be reproduced in its entirety. All results listed in this report are for the exclusive use of the submitting party. Pace Analytical assumes no responsibility for report alteration, separation, detachment or third party interpretation. 4100 Atlas Court Bakersfield, CA 93308 (661) 327-4911 FAX (661) 327-1918 www.pacelabs.com Report ID: 1001550739 Page 39 of 50 Catalyst Environmental Solutions
315 Montana Ave Suite 311
Santa Monica, CA 90403
Project:

Project Number:

Project Manager:

Walnut Bluff
[none]
Yola Byram
Reported: 11/11/2024 15:09
Pace Sample ID: 2416404-16 Client Sample Name:

Constituent Result Units Method Bias Quals
MB Lab
Volatile Organic Compounds by GC/MS (EPA Method TO-15 at STP) DCN
WB18-1H, 10/9/2024 2:56:00PM, Elizabeth Hwang/Olivia Hogan

PQL MDL
Benzene 1.1 ug/m3 0.050 0.0032 EPA-TO-15-SIM ND 1
Benzyl chloride ND ug/m3 0.50 0.0052 EPA-TO-15-SIM ND 1 Carbon tetrachloride 0.50 ug/m3 0.20 0.0063 EPA-TO-15-SIM ND 1 Chlorobenzene ND ug/m3 0.10 0.0079 EPA-TO-15-SIM ND 1
Chloroform 0.20 ug/m3 0.050 0.0058 EPA-TO-15-SIM ND 1
1,2-Dibromoethane ND ug/m3 0.20 0.014 EPA-TO-15-SIM ND 1 1,2-Dichlorobenzene ND ug/m3 0.20 0.011 EPA-TO-15-SIM ND 1 1,3-Dichlorobenzene ND ug/m3 0.20 0.013 EPA-TO-15-SIM ND 1 1,4-Dichlorobenzene 0.092 ug/m3 0.20 0.016 EPA-TO-15-SIM ND J 1 Dichlorodifluoromethane 2.4 ug/m3 0.050 0.0052 EPA-TO-15-SIM ND 1 1,1-Dichloroethane ND ug/m3 0.050 0.0041 EPA-TO-15-SIM ND 1 1,2-Dichloroethane 0.073 ug/m3 0.10 0.0046 EPA-TO-15-SIM ND J 1 1,1-Dichloroethene ND ug/m3 0.050 0.0078 EPA-TO-15-SIM ND 1 cis-1,2-Dichloroethene ND ug/m3 0.050 0.0044 EPA-TO-15-SIM ND 1 trans-1,2-Dichloroethene ND ug/m3 0.050 0.0075 EPA-TO-15-SIM ND 1 trans-1,3-Dichloropropene ND ug/m3 0.050 0.013 EPA-TO-15-SIM ND 1 1,1-Difluoroethane 0.80 ug/m3 5.0 0.0027 EPA-TO-15-SIM ND J 1 Ethylbenzene 0.52 ug/m3 0.050 0.017 EPA-TO-15-SIM ND 1
Naphthalene 0.13 ug/m3 0.20 0.020 EPA-TO-15-SIM ND J 1
Tetrachloroethene 0.12 ug/m3 0.10 0.011 EPA-TO-15-SIM ND 1 Toluene 2.5 ug/m3 1.0 0.062 EPA-TO-15-SIM ND 2
1,1,1-Trichloroethane ND ug/m3 0.10 0.0055 EPA-TO-15-SIM ND 1 1,1,2-Trichloroethane ND ug/m3 0.10 0.0055 EPA-TO-15-SIM ND 1 Trichloroethene ND ug/m3 0.10 0.0095 EPA-TO-15-SIM ND 1 Trichlorofluoromethane 1.3 ug/m3 0.050 0.0057 EPA-TO-15-SIM ND 1 1,1,2-Trichloro-1,2,2-trifluoroethane 0.53 ug/m3 0.10 0.0078 EPA-TO-15-SIM ND 1 Vinyl chloride ND ug/m3 0.020 0.0046 EPA-TO-15-SIM ND 1 p- & m-Xylenes 1.5 ug/m3 0.050 0.0082 EPA-TO-15-SIM ND 1 o-Xylene 0.56 ug/m3 0.050 0.0044 EPA-TO-15-SIM ND 1
Total Xylenes 2.0 ug/m3 0.10 0.013 EPA-TO-15-SIM ND 1
4-Bromofluorobenzene (Surrogate) 106 % 50 - 150 (LCL - UCL) EPA-TO-15-SIM 1 4-Bromofluorobenzene (Surrogate) 106 % 50 - 150 (LCL - UCL) EPA-TO-15-SIM 1 4-Bromofluorobenzene (Surrogate) 86.3 % 50 - 150 (LCL - UCL) EPA-TO-15-SIM 2 The results in this report apply to the samples analyzed in accordance with the chain of custody document. This analytical report must be reproduced in its entirety. All results listed in this report are for the exclusive use of the submitting party. Pace Analytical assumes no responsibility for report alteration, separation, detachment or third party interpretation. 4100 Atlas Court Bakersfield, CA 93308 (661) 327-4911 FAX (661) 327-1918 www.pacelabs.com Report ID: 1001550739 Page 40 of 50 Catalyst Environmental Solutions
315 Montana Ave Suite 311
Santa Monica, CA 90403
Project:

Project Number:

Project Manager:

Walnut Bluff
[none]
Yola Byram
Reported: 11/11/2024 15:09
BCL Sample ID: 2416404-16 Client Sample Name:

Method Prep Date Date/Time
Run
Analyst Instrument Dilution Batch ID
QC
Volatile Organic Compounds by GC/MS (EPA Method TO-15 at STP) DCN
WB18-1H, 10/9/2024 2:56:00PM, Elizabeth Hwang/Olivia Hogan 1 EPA-TO-15-SIM 10/14/24 09:06 10/14/24 19:16 BEP MS-A2 1 B198806 EPA TO-15 2 EPA-TO-15-SIM 10/14/24 09:06 10/15/24 03:24 BEP MS-A2 10 B198806 EPA TO-15 DCN = Data Continuation Number
The results in this report apply to the samples analyzed in accordance with the chain of custody document. This analytical report must be reproduced in its entirety. All results listed in this report are for the exclusive use of the submitting party. Pace Analytical assumes no responsibility for report alteration, separation, detachment or third party interpretation. 4100 Atlas Court Bakersfield, CA 93308 (661) 327-4911 FAX (661) 327-1918 www.pacelabs.com Report ID: 1001550739 Page 41 of 50 Catalyst Environmental Solutions
315 Montana Ave Suite 311
Santa Monica, CA 90403
Project:

Project Number:

Project Manager:

Walnut Bluff
[none]
Yola Byram
Reported: 11/11/2024 15:09
Pace Sample ID: 2416404-17 Client Sample Name:

Constituent Result Units Method Bias Quals
MB Lab
Volatile Organic Compounds by GC/MS (EPA Method TO-15 at STP) DCN
WB19-1H, 10/9/2024 10:54:00AM, Elizabeth Hwang/Olivia Hogan

PQL MDL
Benzene 1.6 ug/m3 0.050 0.0032 EPA-TO-15-SIM ND 1
Benzyl chloride ND ug/m3 0.50 0.0052 EPA-TO-15-SIM ND 1 Carbon tetrachloride 0.50 ug/m3 0.20 0.0063 EPA-TO-15-SIM ND 1 Chlorobenzene ND ug/m3 0.10 0.0079 EPA-TO-15-SIM ND 1
Chloroform 0.23 ug/m3 0.050 0.0058 EPA-TO-15-SIM ND 1
1,2-Dibromoethane ND ug/m3 0.20 0.014 EPA-TO-15-SIM ND 1 1,2-Dichlorobenzene ND ug/m3 0.20 0.011 EPA-TO-15-SIM ND 1 1,3-Dichlorobenzene ND ug/m3 0.20 0.013 EPA-TO-15-SIM ND 1 1,4-Dichlorobenzene 0.091 ug/m3 0.20 0.016 EPA-TO-15-SIM ND J 1 Dichlorodifluoromethane 2.4 ug/m3 0.050 0.0052 EPA-TO-15-SIM ND 1 1,1-Dichloroethane ND ug/m3 0.050 0.0041 EPA-TO-15-SIM ND 1 1,2-Dichloroethane 0.11 ug/m3 0.10 0.0046 EPA-TO-15-SIM ND 1 1,1-Dichloroethene ND ug/m3 0.050 0.0078 EPA-TO-15-SIM ND 1 cis-1,2-Dichloroethene ND ug/m3 0.050 0.0044 EPA-TO-15-SIM ND 1 trans-1,2-Dichloroethene ND ug/m3 0.050 0.0075 EPA-TO-15-SIM ND 1 trans-1,3-Dichloropropene ND ug/m3 0.050 0.013 EPA-TO-15-SIM ND 1 1,1-Difluoroethane 1.1 ug/m3 5.0 0.0027 EPA-TO-15-SIM ND J 1 Ethylbenzene 0.69 ug/m3 0.050 0.017 EPA-TO-15-SIM ND 1
Naphthalene 0.77 ug/m3 0.20 0.020 EPA-TO-15-SIM ND 1
Tetrachloroethene ND ug/m3 0.10 0.011 EPA-TO-15-SIM ND 1 Toluene 2.8 ug/m3 1.0 0.062 EPA-TO-15-SIM ND 2
1,1,1-Trichloroethane ND ug/m3 0.10 0.0055 EPA-TO-15-SIM ND 1 1,1,2-Trichloroethane ND ug/m3 0.10 0.0055 EPA-TO-15-SIM ND 1 Trichloroethene ND ug/m3 0.10 0.0095 EPA-TO-15-SIM ND 1 Trichlorofluoromethane 1.2 ug/m3 0.050 0.0057 EPA-TO-15-SIM ND 1 1,1,2-Trichloro-1,2,2-trifluoroethane 0.54 ug/m3 0.10 0.0078 EPA-TO-15-SIM ND 1 Vinyl chloride ND ug/m3 0.020 0.0046 EPA-TO-15-SIM ND 1 p- & m-Xylenes 2.4 ug/m3 0.050 0.0082 EPA-TO-15-SIM ND 1 o-Xylene 0.78 ug/m3 0.050 0.0044 EPA-TO-15-SIM ND 1
Total Xylenes 3.1 ug/m3 0.10 0.013 EPA-TO-15-SIM ND 1
4-Bromofluorobenzene (Surrogate) 105 % 50 - 150 (LCL - UCL) EPA-TO-15-SIM 1 4-Bromofluorobenzene (Surrogate) 105 % 50 - 150 (LCL - UCL) EPA-TO-15-SIM 1 4-Bromofluorobenzene (Surrogate) 96.6 % 50 - 150 (LCL - UCL) EPA-TO-15-SIM 2 The results in this report apply to the samples analyzed in accordance with the chain of custody document. This analytical report must be reproduced in its entirety. All results listed in this report are for the exclusive use of the submitting party. Pace Analytical assumes no responsibility for report alteration, separation, detachment or third party interpretation. 4100 Atlas Court Bakersfield, CA 93308 (661) 327-4911 FAX (661) 327-1918 www.pacelabs.com Report ID: 1001550739 Page 42 of 50 Catalyst Environmental Solutions
315 Montana Ave Suite 311
Santa Monica, CA 90403
Project:

Project Number:

Project Manager:

Walnut Bluff
[none]
Yola Byram
Reported: 11/11/2024 15:09
BCL Sample ID: 2416404-17 Client Sample Name:

Method Prep Date Date/Time
Run
Analyst Instrument Dilution Batch ID
QC
Volatile Organic Compounds by GC/MS (EPA Method TO-15 at STP) DCN
WB19-1H, 10/9/2024 10:54:00AM, Elizabeth Hwang/Olivia Hogan 1 EPA-TO-15-SIM 10/14/24 09:06 10/14/24 20:02 BEP MS-A2 1 B198806 EPA TO-15 2 EPA-TO-15-SIM 10/14/24 09:06 10/15/24 09:56 BEP MS-A2 10 B198806 EPA TO-15 DCN = Data Continuation Number
The results in this report apply to the samples analyzed in accordance with the chain of custody document. This analytical report must be reproduced in its entirety. All results listed in this report are for the exclusive use of the submitting party. Pace Analytical assumes no responsibility for report alteration, separation, detachment or third party interpretation. 4100 Atlas Court Bakersfield, CA 93308 (661) 327-4911 FAX (661) 327-1918 www.pacelabs.com Report ID: 1001550739 Page 43 of 50 Catalyst Environmental Solutions
315 Montana Ave Suite 311
Santa Monica, CA 90403
Project:

Project Number:

Project Manager:

Walnut Bluff
[none]
Yola Byram
Reported: 11/11/2024 15:09
Quality Control Report - Method Blank Analysis
Constituent QC Sample ID MB Result Units Lab Quals
Volatile Organic Compounds by GC/MS (EPA Method TO-15 at STP) PQL MDL Run #
QC Batch ID: B198723
Benzene B198723-BLK1 ND ug/m3 0.050 0.0032 1
Benzyl chloride B198723-BLK1 ND ug/m3 0.50 0.0052 1
Carbon tetrachloride B198723-BLK1 ND ug/m3 0.20 0.0063 1 Chlorobenzene B198723-BLK1 ND ug/m3 0.10 0.0079 1
Chloroform B198723-BLK1 ND ug/m3 0.050 0.0058 1
1,2-Dibromoethane B198723-BLK1 ND ug/m3 0.20 0.014 1
1,2-Dichlorobenzene B198723-BLK1 ND ug/m3 0.20 0.011 1
1,3-Dichlorobenzene B198723-BLK1 ND ug/m3 0.20 0.013 1
1,4-Dichlorobenzene B198723-BLK1 ND ug/m3 0.20 0.016 1
Dichlorodifluoromethane B198723-BLK1 ND ug/m3 0.050 0.0052 1 1,1-Dichloroethane B198723-BLK1 ND ug/m3 0.050 0.0041 1 1,2-Dichloroethane B198723-BLK1 ND ug/m3 0.10 0.0046 1
1,1-Dichloroethene B198723-BLK1 ND ug/m3 0.050 0.0078 1 cis-1,2-Dichloroethene B198723-BLK1 ND ug/m3 0.050 0.0044 1 trans-1,2-Dichloroethene B198723-BLK1 ND ug/m3 0.050 0.0075 1 trans-1,3-Dichloropropene B198723-BLK1 ND ug/m3 0.050 0.013 1 1,1-Difluoroethane B198723-BLK1 ND ug/m3 5.0 0.0027 1
Ethylbenzene B198723-BLK1 ND ug/m3 0.050 0.017 1
Naphthalene B198723-BLK1 ND ug/m3 0.20 0.020 1
Tetrachloroethene B198723-BLK1 ND ug/m3 0.10 0.011 1
Toluene B198723-BLK1 ND ug/m3 0.10 0.0062 1
1,1,1-Trichloroethane B198723-BLK1 ND ug/m3 0.10 0.0055 1 1,1,2-Trichloroethane B198723-BLK1 ND ug/m3 0.10 0.0055 1 Trichloroethene B198723-BLK1 ND ug/m3 0.10 0.0095 1
Trichlorofluoromethane B198723-BLK1 ND ug/m3 0.050 0.0057 1 1,1,2-Trichloro-1,2,2-trifluoroethane B198723-BLK1 ND ug/m3 0.10 0.0078 1 Vinyl chloride B198723-BLK1 ND ug/m3 0.020 0.0046 1
p- & m-Xylenes B198723-BLK1 ND ug/m3 0.050 0.0082 1
o-Xylene B198723-BLK1 ND ug/m3 0.050 0.0044 1
Total Xylenes B198723-BLK1 ND ug/m3 0.10 0.013 1
4-Bromofluorobenzene (Surrogate) B198723-BLK1 92.1 % 50 - 150 (LCL - UCL) 1 QC Batch ID: B198806
Benzene B198806-BLK1 ND ug/m3 0.050 0.0032 2
The results in this report apply to the samples analyzed in accordance with the chain of custody document. This analytical report must be reproduced in its entirety. All results listed in this report are for the exclusive use of the submitting party. Pace Analytical assumes no responsibility for report alteration, separation, detachment or third party interpretation. 4100 Atlas Court Bakersfield, CA 93308 (661) 327-4911 FAX (661) 327-1918 www.pacelabs.com Report ID: 1001550739 Page 44 of 50 Catalyst Environmental Solutions
315 Montana Ave Suite 311
Santa Monica, CA 90403
Project:

Project Number:

Project Manager:

Walnut Bluff
[none]
Yola Byram
Reported: 11/11/2024 15:09
Quality Control Report - Method Blank Analysis
Constituent QC Sample ID MB Result Units Lab Quals
Volatile Organic Compounds by GC/MS (EPA Method TO-15 at STP) PQL MDL Run #
QC Batch ID: B198806
Benzyl chloride B198806-BLK1 ND ug/m3 0.50 0.0052 2
Carbon tetrachloride B198806-BLK1 ND ug/m3 0.20 0.0063 2 Chlorobenzene B198806-BLK1 ND ug/m3 0.10 0.0079 2
Chloroform B198806-BLK1 ND ug/m3 0.050 0.0058 2
1,2-Dibromoethane B198806-BLK1 ND ug/m3 0.20 0.014 2
1,2-Dichlorobenzene B198806-BLK1 ND ug/m3 0.20 0.011 2
1,3-Dichlorobenzene B198806-BLK1 ND ug/m3 0.20 0.013 2
1,4-Dichlorobenzene B198806-BLK1 ND ug/m3 0.20 0.016 2
Dichlorodifluoromethane B198806-BLK1 ND ug/m3 0.050 0.0052 2 1,1-Dichloroethane B198806-BLK1 ND ug/m3 0.050 0.0041 2 1,2-Dichloroethane B198806-BLK1 ND ug/m3 0.10 0.0046 2
1,1-Dichloroethene B198806-BLK1 ND ug/m3 0.050 0.0078 2 cis-1,2-Dichloroethene B198806-BLK1 ND ug/m3 0.050 0.0044 2 trans-1,2-Dichloroethene B198806-BLK1 ND ug/m3 0.050 0.0075 2 trans-1,3-Dichloropropene B198806-BLK1 ND ug/m3 0.050 0.013 2 1,1-Difluoroethane B198806-BLK1 ND ug/m3 5.0 0.0027 2
Ethylbenzene B198806-BLK1 ND ug/m3 0.050 0.017 2
Naphthalene B198806-BLK1 ND ug/m3 0.20 0.020 2
Tetrachloroethene B198806-BLK1 ND ug/m3 0.10 0.011 2
Toluene B198806-BLK1 ND ug/m3 0.10 0.0062 2
1,1,1-Trichloroethane B198806-BLK1 ND ug/m3 0.10 0.0055 2 1,1,2-Trichloroethane B198806-BLK1 ND ug/m3 0.10 0.0055 2 Trichloroethene B198806-BLK1 ND ug/m3 0.10 0.0095 2
Trichlorofluoromethane B198806-BLK1 ND ug/m3 0.050 0.0057 2 1,1,2-Trichloro-1,2,2-trifluoroethane B198806-BLK1 ND ug/m3 0.10 0.0078 2 Vinyl chloride B198806-BLK1 ND ug/m3 0.020 0.0046 2
p- & m-Xylenes B198806-BLK1 ND ug/m3 0.050 0.0082 2
o-Xylene B198806-BLK1 ND ug/m3 0.050 0.0044 2
Total Xylenes B198806-BLK1 ND ug/m3 0.10 0.013 2
4-Bromofluorobenzene (Surrogate) B198806-BLK1 95.4 % 50 - 150 (LCL - UCL) 2 The results in this report apply to the samples analyzed in accordance with the chain of custody document. This analytical report must be reproduced in its entirety. All results listed in this report are for the exclusive use of the submitting party. Pace Analytical assumes no responsibility for report alteration, separation, detachment or third party interpretation. 4100 Atlas Court Bakersfield, CA 93308 (661) 327-4911 FAX (661) 327-1918 www.pacelabs.com Report ID: 1001550739 Page 45 of 50 Catalyst Environmental Solutions
315 Montana Ave Suite 311
Santa Monica, CA 90403
Project:

Project Number:

Project Manager:

Walnut Bluff
[none]
Yola Byram
Reported: 11/11/2024 15:09
Volatile Organic Compounds by GC/MS (EPA Method TO-15 at STP) Quality Control Report - Method Blank Analysis
Run # QC Sample ID QC Type Method Prep Date
Run
Date Time Analyst Instrument Dilution
1 B198723-BLK1 PB EPA-TO-15-SIM 10/11/24 10/11/24 14:23 BEP MS-A2 1 2 B198806-BLK1 PB EPA-TO-15-SIM 10/14/24 10/14/24 16:11 BEP MS-A2 1 The results in this report apply to the samples analyzed in accordance with the chain of custody document. This analytical report must be reproduced in its entirety. All results listed in this report are for the exclusive use of the submitting party. Pace Analytical assumes no responsibility for report alteration, separation, detachment or third party interpretation. 4100 Atlas Court Bakersfield, CA 93308 (661) 327-4911 FAX (661) 327-1918 www.pacelabs.com Report ID: 1001550739 Page 46 of 50 Catalyst Environmental Solutions
315 Montana Ave Suite 311
Santa Monica, CA 90403
Project:

Project Number:

Project Manager:

Walnut Bluff
[none]
Yola Byram
Reported: 11/11/2024 15:09
Quality Control Report - Laboratory Control Sample
Constituent
Control Limits
Spike Percent Percent
QC Sample ID Type Result Level Units Recovery RPD Recovery RPD Quals Volatile Organic Compounds by GC/MS (EPA Method TO-15 at STP) Run #
Lab
QC Batch ID: B198723
Benzene B198723-BS1 LCS 0.33316 0.31948 ug/m3 104 70 - 130 1 B198723-BSD1 LCSD 0.34254 0.31948 ug/m3 107 2.8 70 - 130 25 2 Benzyl chloride B198723-BS1 LCS 0.57789 0.51772 ug/m3 112 70 - 130 1 B198723-BSD1 LCSD 0.49353 0.51772 ug/m3 95.3 15.7 70 - 130 25 J 2 Carbon tetrachloride B198723-BS1 LCS 0.72246 0.62913 ug/m3 115 70 - 130 1 B198723-BSD1 LCSD 0.70909 0.62913 ug/m3 113 1.9 70 - 130 25 2 Chlorobenzene B198723-BS1 LCS 0.53771 0.46036 ug/m3 117 70 - 130 1 B198723-BSD1 LCSD 0.51817 0.46036 ug/m3 113 3.7 70 - 130 25 2 Chloroform B198723-BS1 LCS 0.56905 0.48825 ug/m3 117 70 - 130 1 B198723-BSD1 LCSD 0.56923 0.48825 ug/m3 117 0.0 70 - 130 25 2 1,2-Dibromoethane B198723-BS1 LCS 0.91575 0.76835 ug/m3 119 70 - 130 1 B198723-BSD1 LCSD 0.87062 0.76835 ug/m3 113 5.1 70 - 130 25 2 1,2-Dichlorobenzene B198723-BS1 LCS 0.67972 0.60124 ug/m3 113 70 - 130 1 B198723-BSD1 LCSD 0.64027 0.60124 ug/m3 106 6.0 70 - 130 25 2 1,3-Dichlorobenzene B198723-BS1 LCS 0.69255 0.60124 ug/m3 115 70 - 130 1 B198723-BSD1 LCSD 0.63229 0.60124 ug/m3 105 9.1 70 - 130 25 2 1,4-Dichlorobenzene B198723-BS1 LCS 0.70998 0.60124 ug/m3 118 70 - 130 1 B198723-BSD1 LCSD 0.63415 0.60124 ug/m3 105 11.3 70 - 130 25 2 1,1-Dichloroethane B198723-BS1 LCS 0.45441 0.40474 ug/m3 112 70 - 130 1 B198723-BSD1 LCSD 0.45405 0.40474 ug/m3 112 0.1 70 - 130 25 2 1,2-Dichloroethane B198723-BS1 LCS 0.47149 0.40474 ug/m3 116 70 - 130 1 B198723-BSD1 LCSD 0.47265 0.40474 ug/m3 117 0.2 70 - 130 25 2 1,1-Dichloroethene B198723-BS1 LCS 0.42913 0.39649 ug/m3 108 70 - 130 1 B198723-BSD1 LCSD 0.43508 0.39649 ug/m3 110 1.4 70 - 130 25 2 cis-1,2-Dichloroethene B198723-BS1 LCS 0.42444 0.39649 ug/m3 107 70 - 130 1 B198723-BSD1 LCSD 0.42756 0.39649 ug/m3 108 0.7 70 - 130 25 2 Tetrachloroethene B198723-BS1 LCS 0.80707 0.67825 ug/m3 119 70 - 130 1 B198723-BSD1 LCSD 0.80118 0.67825 ug/m3 118 0.7 70 - 130 25 2 Toluene B198723-BS1 LCS 0.40311 0.37684 ug/m3 107 70 - 130 1 B198723-BSD1 LCSD 0.39207 0.37684 ug/m3 104 2.8 70 - 130 25 2 1,1,1-Trichloroethane B198723-BS1 LCS 0.63396 0.54562 ug/m3 116 70 - 130 1 B198723-BSD1 LCSD 0.63793 0.54562 ug/m3 117 0.6 70 - 130 25 2 1,1,2-Trichloroethane B198723-BS1 LCS 0.66127 0.54562 ug/m3 121 70 - 130 1 B198723-BSD1 LCSD 0.64257 0.54562 ug/m3 118 2.9 70 - 130 25 2 Trichloroethene B198723-BS1 LCS 0.62429 0.53737 ug/m3 116 70 - 130 1 B198723-BSD1 LCSD 0.61305 0.53737 ug/m3 114 1.8 70 - 130 25 2 The results in this report apply to the samples analyzed in accordance with the chain of custody document. This analytical report must be reproduced in its entirety. All results listed in this report are for the exclusive use of the submitting party. Pace Analytical assumes no responsibility for report alteration, separation, detachment or third party interpretation. 4100 Atlas Court Bakersfield, CA 93308 (661) 327-4911 FAX (661) 327-1918 www.pacelabs.com Report ID: 1001550739 Page 47 of 50 Catalyst Environmental Solutions
315 Montana Ave Suite 311
Santa Monica, CA 90403
Project:

Project Number:

Project Manager:

Walnut Bluff
[none]
Yola Byram
Reported: 11/11/2024 15:09
Quality Control Report - Laboratory Control Sample
Constituent
Control Limits
Spike Percent Percent
QC Sample ID Type Result Level Units Recovery RPD Recovery RPD Quals Volatile Organic Compounds by GC/MS (EPA Method TO-15 at STP) Run #
Lab
QC Batch ID: B198723
Vinyl chloride B198723-BS1 LCS 0.29600 0.25562 ug/m3 116 70 - 130 1 B198723-BSD1 LCSD 0.29587 0.25562 ug/m3 116 0.0 70 - 130 25 2 p- & m-Xylenes B198723-BS1 LCS 0.93244 0.86843 ug/m3 107 70 - 130 1 B198723-BSD1 LCSD 0.94491 0.86843 ug/m3 109 1.3 70 - 130 25 2 o-Xylene B198723-BS1 LCS 0.47821 0.43421 ug/m3 110 70 - 130 1 B198723-BSD1 LCSD 0.48047 0.43421 ug/m3 111 0.5 70 - 130 25 2 Total Xylenes B198723-BS1 LCS 1.4107 1.3026 ug/m3 108 70 - 130 1 B198723-BSD1 LCSD 1.4254 1.3026 ug/m3 109 1.0 70 - 130 25 2 4-Bromofluorobenzene (Surrogate) B198723-BS1 LCS 3.75 3.58 ug/m3 105 50 - 150 1 B198723-BSD1 LCSD 3.47 3.58 ug/m3 96.9 8.0 50 - 150 2
QC Batch ID: B198806
Benzene B198806-BS1 LCS 0.35204 0.31948 ug/m3 110 70 - 130 3 B198806-BSD1 LCSD 0.35688 0.31948 ug/m3 112 1.4 70 - 130 25 4 Benzyl chloride B198806-BS1 LCS 0.60417 0.51772 ug/m3 117 70 - 130 3 B198806-BSD1 LCSD 0.59163 0.51772 ug/m3 114 2.1 70 - 130 25 4 Carbon tetrachloride B198806-BS1 LCS 0.70353 0.62913 ug/m3 112 70 - 130 3 B198806-BSD1 LCSD 0.72010 0.62913 ug/m3 114 2.3 70 - 130 25 4 Chlorobenzene B198806-BS1 LCS 0.52251 0.46036 ug/m3 114 70 - 130 3 B198806-BSD1 LCSD 0.54190 0.46036 ug/m3 118 3.6 70 - 130 25 4 Chloroform B198806-BS1 LCS 0.57621 0.48825 ug/m3 118 70 - 130 3 B198806-BSD1 LCSD 0.58433 0.48825 ug/m3 120 1.4 70 - 130 25 4 1,2-Dibromoethane B198806-BS1 LCS 0.89439 0.76835 ug/m3 116 70 - 130 3 B198806-BSD1 LCSD 0.91096 0.76835 ug/m3 119 1.8 70 - 130 25 4 1,2-Dichlorobenzene B198806-BS1 LCS 0.70758 0.60124 ug/m3 118 70 - 130 3 B198806-BSD1 LCSD 0.69842 0.60124 ug/m3 116 1.3 70 - 130 25 4 1,3-Dichlorobenzene B198806-BS1 LCS 0.72037 0.60124 ug/m3 120 70 - 130 3 B198806-BSD1 LCSD 0.71854 0.60124 ug/m3 120 0.3 70 - 130 25 4 1,4-Dichlorobenzene B198806-BS1 LCS 0.74288 0.60124 ug/m3 124 70 - 130 3 B198806-BSD1 LCSD 0.74449 0.60124 ug/m3 124 0.2 70 - 130 25 4 1,1-Dichloroethane B198806-BS1 LCS 0.46873 0.40474 ug/m3 116 70 - 130 3 B198806-BSD1 LCSD 0.46911 0.40474 ug/m3 116 0.1 70 - 130 25 4 1,2-Dichloroethane B198806-BS1 LCS 0.47500 0.40474 ug/m3 117 70 - 130 3 B198806-BSD1 LCSD 0.48588 0.40474 ug/m3 120 2.3 70 - 130 25 4 1,1-Dichloroethene B198806-BS1 LCS 0.44522 0.39649 ug/m3 112 70 - 130 3 B198806-BSD1 LCSD 0.46220 0.39649 ug/m3 117 3.7 70 - 130 25 4 cis-1,2-Dichloroethene B198806-BS1 LCS 0.44975 0.39649 ug/m3 113 70 - 130 3 B198806-BSD1 LCSD 0.44477 0.39649 ug/m3 112 1.1 70 - 130 25 4 The results in this report apply to the samples analyzed in accordance with the chain of custody document. This analytical report must be reproduced in its entirety. All results listed in this report are for the exclusive use of the submitting party. Pace Analytical assumes no responsibility for report alteration, separation, detachment or third party interpretation. 4100 Atlas Court Bakersfield, CA 93308 (661) 327-4911 FAX (661) 327-1918 www.pacelabs.com Report ID: 1001550739 Page 48 of 50 Catalyst Environmental Solutions
315 Montana Ave Suite 311
Santa Monica, CA 90403
Project:

Project Number:

Project Manager:

Walnut Bluff
[none]
Yola Byram
Reported: 11/11/2024 15:09
Quality Control Report - Laboratory Control Sample
Constituent
Control Limits
Spike Percent Percent
QC Sample ID Type Result Level Units Recovery RPD Recovery RPD Quals Volatile Organic Compounds by GC/MS (EPA Method TO-15 at STP) Run #
Lab
QC Batch ID: B198806
Tetrachloroethene B198806-BS1 LCS 0.77710 0.67825 ug/m3 115 70 - 130 3 B198806-BSD1 LCSD 0.80833 0.67825 ug/m3 119 3.9 70 - 130 25 4 Toluene B198806-BS1 LCS 0.40225 0.37684 ug/m3 107 70 - 130 3 B198806-BSD1 LCSD 0.42078 0.37684 ug/m3 112 4.5 70 - 130 25 4 1,1,1-Trichloroethane B198806-BS1 LCS 0.64072 0.54562 ug/m3 117 70 - 130 3 B198806-BSD1 LCSD 0.65835 0.54562 ug/m3 121 2.7 70 - 130 25 4 1,1,2-Trichloroethane B198806-BS1 LCS 0.62359 0.54562 ug/m3 114 70 - 130 3 B198806-BSD1 LCSD 0.64832 0.54562 ug/m3 119 3.9 70 - 130 25 4 Trichloroethene B198806-BS1 LCS 0.60167 0.53737 ug/m3 112 70 - 130 3 B198806-BSD1 LCSD 0.62790 0.53737 ug/m3 117 4.3 70 - 130 25 4 Vinyl chloride B198806-BS1 LCS 0.29952 0.25562 ug/m3 117 70 - 130 3 B198806-BSD1 LCSD 0.30319 0.25562 ug/m3 119 1.2 70 - 130 25 4 p- & m-Xylenes B198806-BS1 LCS 0.96885 0.86843 ug/m3 112 70 - 130 3 B198806-BSD1 LCSD 0.99360 0.86843 ug/m3 114 2.5 70 - 130 25 4 o-Xylene B198806-BS1 LCS 0.48972 0.43421 ug/m3 113 70 - 130 3 B198806-BSD1 LCSD 0.50139 0.43421 ug/m3 115 2.4 70 - 130 25 4 Total Xylenes B198806-BS1 LCS 1.4586 1.3026 ug/m3 112 70 - 130 3 B198806-BSD1 LCSD 1.4950 1.3026 ug/m3 115 2.5 70 - 130 25 4 4-Bromofluorobenzene (Surrogate) B198806-BS1 LCS 3.86 3.58 ug/m3 108 50 - 150 3 B198806-BSD1 LCSD 3.74 3.58 ug/m3 105 3.0 50 - 150 4
Run # QC Sample ID QC Type Method Prep Date
Run
Date Time Analyst Instrument Dilution
1 B198723-BS1 LCS EPA-TO-15-SIM 10/11/24 10/11/24 12:53 BEP MS-A2 1 2 B198723-BSD1 LCSD EPA-TO-15-SIM 10/11/24 10/11/24 13:37 BEP MS-A2 1 3 B198806-BS1 LCS EPA-TO-15-SIM 10/14/24 10/14/24 14:40 BEP MS-A2 1 4 B198806-BSD1 LCSD EPA-TO-15-SIM 10/14/24 10/14/24 16:54 BEP MS-A2 1 The results in this report apply to the samples analyzed in accordance with the chain of custody document. This analytical report must be reproduced in its entirety. All results listed in this report are for the exclusive use of the submitting party. Pace Analytical assumes no responsibility for report alteration, separation, detachment or third party interpretation. 4100 Atlas Court Bakersfield, CA 93308 (661) 327-4911 FAX (661) 327-1918 www.pacelabs.com Report ID: 1001550739 Page 49 of 50 Catalyst Environmental Solutions
315 Montana Ave Suite 311
Santa Monica, CA 90403
Project:

Project Number:

Project Manager:

Walnut Bluff
[none]
Yola Byram
Reported: 11/11/2024 15:09
Notes And Definitions
J Estimated Value (CLP Flag)
MDL Method Detection Limit
ND Analyte Not Detected
PQL Practical Quantitation Limit
The results in this report apply to the samples analyzed in accordance with the chain of custody document. This analytical report must be reproduced in its entirety. All results listed in this report are for the exclusive use of the submitting party. Pace Analytical assumes no responsibility for report alteration, separation, detachment or third party interpretation. 4100 Atlas Court Bakersfield, CA 93308 (661) 327-4911 FAX (661) 327-1918 www.pacelabs.com Report ID: 1001550739 Page 50 of 50 Study of Human Health Risks Due to Exposure to Outdoor Air Proposed Walnut Bluff Development
February 2025
Appendix H
PID Calibration Certificates
Lot # Expiration
Isobutylene Gas 22-8650 11/29/2026
ID: 107 or 1693
Cal Standard Reading Acceptable Range
10 Pump Flow mL/min Acceptable Range
481
Response Factor