Amenment 1 -QandA.pdf

SOLICITATION POSTED BETA.SAM 191BWC22R0010 SLUDGE – NOGALES

INTERNATIONAL BOUNDARY AND WATER COMMISSION

Questions & Answer

191BWC22R0010

QUESTIONS:

Q1: The solicitation doesn't identify who's responsible for sludge sampling and analysis for disposal at a landfill.

A1: The Government does all sampling and analysis

Q2: Please share with us a copy of a recent sludge sample analysis.

A2: Please see attached

END of Q&A

RE: 60 Day Sludge

Rio Rico, AZ 85648

865 E Frontage Rd

Michael Dionne

Mary Whaley

Client Services Representative

Legend Technical Services of Arizona, Inc. is pleased to provide the enclosed analytical results for the aforementioned project. These results relate only to the items tested. This cover letter and the accompanying pages represent the full report for these analyses and should only be reproduced in full .

Samples for this project were received by the laboratory on 08/24/22 12:45.

The samples were processed in accordance with the Chain of Custody document and the results presented relate only to the samples tested. The Chain of Custody is considered part of this report.

All samples will be retained by LEGEND for 30 days from the date of this report and then discarded unless other arrangements are made. Due to hold-time and method sample volume requirements, microbiological samples are not retained unless other arrangements are made.

This entire report was reviewed and approved for release by the undersigned. If you have any questions concerning this report, please feel free to contact me.

Sincerely, LEGEND TECHNICAL SERVICES OF ARIZONA, INC.

15 September 2022

International Boundary and Water Commission(IBWC)

Laboratory Work Order No.: 22H3171

This laboratory report is confidential and is intended for the sole use of LEGEND and it's client.

N/AFax:

(602) 324-6100

4585 S. Palo Verde Rd., Ste. 423 � Tucson, AZ 85714

P (520) 327-1234 � F (520) 327-0518 www.legend-group.com

Project:

Project Number:

Project Manager:

Reported:865 E Frontage Rd 8/23/22

Michael Dionne

60 Day Sludge

09/15/22 13:09Rio Rico, AZ 85648

International Boundary and Water Commission(IBWC)

Sample ID Laboratory ID Matrix Date Sampled

ANALYTICAL REPORT FOR SAMPLES

Date ReceivedType

1600-001-60D-AZP 22H3171-01 08/23/22 15:00 08/24/22 12:45Solid (Dry Weight) Composite

This report contains data that were produced by a subcontracted laboratory certified for the fields of testing performed.

Legend Technical Services, St. Paul AZ0557

Bach Pham

651.221.4062

Eurofins (fka Test America)

Danielle Roberts

Phone: 602-959-7617

Danielle.Roberts@et.eurofnsus.com

Case Narrative:

Holding Times: All holding times were met unless otherwise qualified.

QA/QC Criteria: All analyses met method requirements unless otherwise qualified.

Certifications: AZ(PHX)0004, AZ(TUC)OOO4, AIHA#102982, CDC ELITE Member.

Accreditation is applicable only to the test methods specified on the scope of accreditation held by LEGEND.

Comments: All reporting limits utilized in this report are from the approved method with the lowest possible levels of detection. All samples were analyzed on a "wet" basis unless designated as "dry weight".

Containers Intact

Custody Seals

COC/Labels Agree Preservation Confirmed

Received On Ice

2.40°CSamples Received at:

No

No

No

No

No

Sample Condition Upon Receipt:

Temperature: 2.40

All samples were received in acceptable condition unless noted otherwise in the case narrative.

C

Legend Technical Services of Arizona, Inc. 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.

Laboratory Work Order No.: 22H3171

Page 2 of 16Page 2 of 18

Project Manager:

Reported:865 E Frontage Rd 8/23/22

Michael Dionne

60 Day Sludge

09/15/22 13:09Rio Rico, AZ 85648

International Boundary and Water Commission(IBWC)

ResultAnalyte RL Batch Prepared Analyzed Method Notes DilutionUnits

1600-001-60D-AZP (22H3171-01) Solid (Dry Weight) (Composite) Sampled: 08/23/22 15:00 Received: 08/24/22 12:45

MDL

Legend Technical Services, Inc. #AZ0557

PERCENT SOLIDS

% calculationB2I0909% 119% Solids 09/09/22 11:23 09/09/22 11:25

SVOC 8270D

EPA 8270Dmg/kg dry B2I010812.3<Di(2-ethylhexyl)phthalate 09/01/22 10:30 09/07/22 05:10

Surrogate: 2,4,6-Tribromophenol EPA 8270DB2I0108 09/01/22 09/07/22 48.6-12576.3 %

Surrogate: 2-Fluorobiphenyl EPA 8270DB2I0108 09/01/22 09/07/22 42.7-95.864.6 %

Surrogate: 2-Fluorophenol EPA 8270DB2I0108 09/01/22 09/07/22 38.3-10049.8 %

Surrogate: Nitrobenzene-d5 EPA 8270DB2I0108 09/01/22 09/07/22 45.9-91.859.4 %

Surrogate: Phenol-d6 EPA 8270DB2I0108 09/01/22 09/07/22 44.4-97.560.0 %

Surrogate: Terphenyl-d14 EPA 8270DB2I0108 09/01/22 09/07/22 46.3-11560.3 %

Legend Technical Services of Arizona, Inc.

Total Metals

EPA 6010CB2H0938mg/kg dry 242 D1, E42.69.8Arsenic 08/25/22 10:15 08/29/22 20:46

EPA 6010CB2H0938mg/kg dry 20.84 D10.081.6Cadmium 08/25/22 10:15 08/29/22 20:46

EPA 6010CB2H0938mg/kg dry 21.0 D10.29110Chromium 08/25/22 10:15 08/29/22 20:46

EPA 6010CB2H0938mg/kg dry 22.1 D10.80330Copper 08/25/22 10:15 08/29/22 20:46

EPA 6010CB2H0938mg/kg dry 221 D11.231Lead 08/25/22 10:15 08/29/22 20:46

EPA 7471 BB2H0958mg/kg dry 10.350.0171.4Mercury 08/26/22 09:21 08/26/22 11:40

EPA 6010CB2H0938mg/kg dry 24.2 D10.404.8Molybdenum 08/25/22 10:15 08/29/22 20:46

EPA 6010CB2H0938mg/kg dry 24.2 D10.84130Nickel 08/25/22 10:15 08/29/22 20:46

EPA 6010Cmg/kg dry B2H0938242 D1, E8< 2.5Selenium 08/25/22 10:15 08/29/22 20:46

EPA 6010CB2H0938mg/kg dry 22.1 D11.36.7Silver 08/25/22 10:15 08/29/22 20:46

EPA 6010CB2H0938mg/kg dry 24.2 D10.71730Zinc 08/25/22 10:15 08/29/22 20:46

Inorganic Chemistry

EPA 9014B2I0093mg/kg dry 10.5240.1054.66Cyanide, Total 09/02/22 09:10 09/02/22 16:04

[CALC][CALC]mg/kg dry dry

110.5350Nitrate as N 09/06/22 11:23 08/30/22 10:47

[CALC][CALC]mg/kg dry dry

1524053400Organic Nitrogen 09/06/22 11:23 09/07/22 09:13

[CALC][CALC]mg/kg dry dry

1524053800Total Nitrogen 09/06/22 11:23 09/07/22 09:13

SM 4500NH3 Hmg/kg dry B2H09561524 E8< 131Ammonia as N 08/26/22 10:44 08/26/22 12:28

SM 4500 NO3 FB2H1012mg/kg dry 110.53.14352Nitrate + Nitrite as N 08/30/22 10:47 08/30/22 10:47

SM 4500 NO2 BB2H0978mg/kg dry 15.2 E40.72.1Nitrite as N 08/25/22 14:10 08/25/22 14:10

EPA 351.2B2I0123mg/kg dry 15240 M2194053400Total Kjeldahl Nitrogen 09/06/22 11:23 09/07/22 09:13 pH TemperatureB2I0400°C 1 H519.5Temperature 09/12/22 14:57 09/12/22 14:57

EPA 9045 DB2I0400pH Units 1 H56.1pH 09/12/22 14:57 09/12/22 14:57

SM 2540 GB2H0924% 11.019.1% Solids 08/25/22 15:54 08/25/22 15:54

Legend Technical Services of Arizona, Inc. 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.

Page 3 of 16Page 3 of 18

Project Manager:

Reported:865 E Frontage Rd 8/23/22

Michael Dionne

60 Day Sludge

09/15/22 13:09Rio Rico, AZ 85648

International Boundary and Water Commission(IBWC)

ResultAnalyte RL Batch Prepared Analyzed Method Notes DilutionUnits

1600-001-60D-AZP (22H3171-01) Solid (Dry Weight) (Composite) Sampled: 08/23/22 15:00 Received: 08/24/22 12:45

MDL

Eurofins Phoenix

Phosphorus Soluble T5, M3, D2

SM 4500 P E282724mg/Kg 1004802400Total Phosphorus 08/30/22 10:32 08/31/22 08:54

Legend Technical Services of Arizona, Inc. 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.

Page 4 of 16Page 4 of 18

Project Manager:

Reported:865 E Frontage Rd 8/23/22

Michael Dionne

60 Day Sludge

09/15/22 13:09Rio Rico, AZ 85648

International Boundary and Water Commission(IBWC)

Result Limit

Reporting

Units Level

Spike

Result

Source

%REC

%REC

Limits RPD

RPD

Limit Notes Analyte

Total Metals - Quality Control

Legend Technical Services of Arizona, Inc.

Batch B2H0938 - EPA 3050B Dry

Blank (B2H0938-BLK1) Prepared: 08/25/22 Analyzed: 08/29/22

Arsenic mg/kg wet0.20<0.20

Cadmium mg/kg wet0.004<0.004

Chromium mg/kg wet0.0050<0.0050

Copper mg/kg wet0.010<0.010

Lead mg/kg wet0.10<0.10

Molybdenum mg/kg wet0.0200.0022

Nickel mg/kg wet0.020<0.020

Selenium mg/kg wet0.20<0.20

Silver mg/kg wet0.010<0.010

Zinc mg/kg wet0.020<0.020

LCS (B2H0938-BS1) Prepared: 08/25/22 Analyzed: 08/29/22

Arsenic mg/kg wet0.20 2.00 80-120891.8

Cadmium mg/kg wet0.004 0.400 80-120910.36

Chromium mg/kg wet0.0050 0.500 80-120930.46

Copper mg/kg wet0.010 1.00 80-120970.97

Lead mg/kg wet0.10 1.00 80-120890.89

Molybdenum mg/kg wet0.020 0.200 80-120950.19

Nickel mg/kg wet0.020 1.00 80-120910.91

Selenium mg/kg wet0.20 1.00 80-120810.81

Silver mg/kg wet0.010 0.500 80-120990.49

Zinc mg/kg wet0.020 1.00 80-120900.90

LCS Dup (B2H0938-BSD1) Prepared: 08/25/22 Analyzed: 08/29/22

Arsenic mg/kg wet0.20 2.00 2080-12093 51.9

Cadmium mg/kg wet0.004 0.400 2080-12094 40.38

Chromium mg/kg wet0.0050 0.500 2080-12095 20.47

Copper mg/kg wet0.010 1.00 2080-120100 31.0

Lead mg/kg wet0.10 1.00 2080-12093 40.93

Molybdenum mg/kg wet0.020 0.200 2080-12097 20.19

Nickel mg/kg wet0.020 1.00 2080-12093 30.93

Selenium mg/kg wet0.20 1.00 2080-12087 80.87

Silver mg/kg wet0.010 0.500 2080-120103 40.51

Zinc mg/kg wet0.020 1.00 2080-12092 30.92

Legend Technical Services of Arizona, Inc. 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.

Page 5 of 16Page 5 of 18

Project Manager:

Reported:865 E Frontage Rd 8/23/22

Michael Dionne

60 Day Sludge

09/15/22 13:09Rio Rico, AZ 85648

International Boundary and Water Commission(IBWC)

Result Limit

Reporting

Units Level

Spike

Result

Source

%REC

%REC

Limits RPD

RPD

Limit Notes Analyte

Total Metals - Quality Control

Legend Technical Services of Arizona, Inc.

Batch B2H0938 - EPA 3050B Dry

Matrix Spike (B2H0938-MS2) Prepared: 08/25/22 Analyzed: 08/29/22 Source: 22H3287-02

Arsenic mg/kg dry44 440 75-125101460 16

Cadmium mg/kg dry0.88 87.9 75-1259786 0.57

Chromium mg/kg dry1.1 110 75-12599150 46

Copper mg/kg dry2.2 220 75-125110520 280

Lead mg/kg dry22 220 75-12597220 6.2

Molybdenum mg/kg dry4.4 44.0 75-12510056 12

Nickel mg/kg dry4.4 220 75-12598230 14

Selenium mg/kg dry44 220 75-125100230 6.8

Silver mg/kg dry2.2 110 75-125115130 <2.2

Zinc mg/kg dry4.4 220 75-12596540 330

Matrix Spike Dup (B2H0938-MSD2) Prepared: 08/25/22 Analyzed: 08/29/22 Source: 22H3287-02

Arsenic mg/kg dry44 440 2075-125102 0.5460 16

Cadmium mg/kg dry0.88 87.9 2075-12598 0.386 0.57

Chromium mg/kg dry1.1 110 2075-125100 0.2160 46

Copper mg/kg dry2.2 220 2075-125110 0.004520 280

Lead mg/kg dry22 220 2075-12597 0.1220 6.2

Molybdenum mg/kg dry4.4 44.0 2075-125100 0.456 12

Nickel mg/kg dry4.4 220 2075-12598 0.1230 14

Selenium mg/kg dry44 220 2075-125100 0.7230 6.8

Silver mg/kg dry2.2 110 2075-125115 0.3130 <2.2

Zinc mg/kg dry4.4 220 2075-12597 0.3540 330

Batch B2H0958 - EPA 7471A Prep

Blank (B2H0958-BLK1) Prepared & Analyzed: 08/26/22

Mercury mg/kg wet0.0004<0.0004

Legend Technical Services of Arizona, Inc. 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.

Page 6 of 16Page 6 of 18

Project Manager:

Reported:865 E Frontage Rd 8/23/22

Michael Dionne

60 Day Sludge

09/15/22 13:09Rio Rico, AZ 85648

International Boundary and Water Commission(IBWC)

Result Limit

Reporting

Units Level

Spike

Result

Source

%REC

%REC

Limits RPD

RPD

Limit Notes Analyte

Total Metals - Quality Control

Legend Technical Services of Arizona, Inc.

Batch B2H0958 - EPA 7471A Prep

LCS (B2H0958-BS1) Prepared & Analyzed: 08/26/22

Mercury mg/kg wet0.0004 0.00400 80-1201000.0040

LCS Dup (B2H0958-BSD1) Prepared & Analyzed: 08/26/22

Mercury mg/kg wet0.0004 0.00400 2080-12097 20.0039

Matrix Spike (B2H0958-MS1) Prepared & Analyzed: 08/26/22 Source: 22H3287-02

Mercury mg/kg dry0.37 3.66 80-120923.7 0.28

Matrix Spike Dup (B2H0958-MSD1) Prepared & Analyzed: 08/26/22 Source: 22H3287-02

Mercury mg/kg dry0.37 3.66 2080-12093 0.33.7 0.28

Legend Technical Services of Arizona, Inc. 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.

Page 7 of 16Page 7 of 18

Project Manager:

Reported:865 E Frontage Rd 8/23/22

Michael Dionne

60 Day Sludge

09/15/22 13:09Rio Rico, AZ 85648

International Boundary and Water Commission(IBWC)

Result Limit

Reporting

Units Level

Spike

Result

Source

%REC

%REC

Limits RPD

RPD

Limit Notes Analyte

Inorganic Chemistry - Quality Control

Legend Technical Services of Arizona, Inc.

Batch B2H0924 - NO PREP

Blank (B2H0924-BLK1) Prepared & Analyzed: 08/25/22

% Solids %1.0<1.0

Duplicate (B2H0924-DUP1) Prepared & Analyzed: 08/25/22 Source: 22H2932-02

% Solids %1.0 10139.1 39.6

Batch B2H0956 - NO PREP

Blank (B2H0956-BLK1) Prepared & Analyzed: 08/26/22

Ammonia as N mg/kg wet1.00<1.00

LCS (B2H0956-BS1) Prepared & Analyzed: 08/26/22

Ammonia as N mg/kg wet1.00 10.0 90-11010310.3

LCS Dup (B2H0956-BSD1) Prepared & Analyzed: 08/26/22

Ammonia as N mg/kg wet1.00 10.0 2090-110103 010.3

Matrix Spike (B2H0956-MS1) Prepared & Analyzed: 08/26/22 Source: 22H0668-01

Ammonia as N mg/L 10.0 D2a90-11010014.2 4.18

Matrix Spike Dup (B2H0956-MSD1) Prepared & Analyzed: 08/26/22 Source: 22H0668-01

Ammonia as N mg/L 10.0 20 D2a90-11010114.3 4.18

Batch B2H0978 - NO PREP

Blank (B2H0978-BLK1) Prepared & Analyzed: 08/25/22

Nitrite as N mg/kg wet0.1<0.1

Legend Technical Services of Arizona, Inc. 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.

Page 8 of 16Page 8 of 18

Project Manager:

Reported:865 E Frontage Rd 8/23/22

Michael Dionne

60 Day Sludge

09/15/22 13:09Rio Rico, AZ 85648

International Boundary and Water Commission(IBWC)

Result Limit

Reporting

Units Level

Spike

Result

Source

%REC

%REC

Limits RPD

RPD

Limit Notes Analyte

Inorganic Chemistry - Quality Control

Legend Technical Services of Arizona, Inc.

Batch B2H0978 - NO PREP

LCS (B2H0978-BS1) Prepared & Analyzed: 08/25/22

Nitrite as N mg/kg wet0.1 0.200 80-1201000.2

LCS Dup (B2H0978-BSD1) Prepared & Analyzed: 08/25/22

Nitrite as N mg/kg wet0.1 0.200 2080-120100 00.2

Matrix Spike (B2H0978-MS1) Prepared & Analyzed: 08/25/22 Source: 22H3171-01

Nitrite as N mg/kg dry5.2 10.5 80-12010112.7 2.1

Matrix Spike Dup (B2H0978-MSD1) Prepared & Analyzed: 08/25/22 Source: 22H3171-01

Nitrite as N mg/kg dry5.2 10.5 2080-120101 0.412.7 2.1

Batch B2H1012 - NO PREP

Blank (B2H1012-BLK1) Prepared & Analyzed: 08/30/22

Nitrate + Nitrite as N mg/kg wet0.20<0.20

LCS (B2H1012-BS1) Prepared & Analyzed: 08/30/22

Nitrate + Nitrite as N mg/kg wet0.20 10.0 90-11010110.1

LCS Dup (B2H1012-BSD1) Prepared & Analyzed: 08/30/22

Nitrate + Nitrite as N mg/kg wet0.20 10.0 2090-110101 010.1

Matrix Spike (B2H1012-MS1) Prepared & Analyzed: 08/30/22 Source: 22H3171-01

Nitrate + Nitrite as N mg/L 10.0 80-12010717.4 6.73

Matrix Spike Dup (B2H1012-MSD1) Prepared & Analyzed: 08/30/22 Source: 22H3171-01

Nitrate + Nitrite as N mg/L 10.0 2080-120110 217.7 6.73

Legend Technical Services of Arizona, Inc. 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.

Page 9 of 16Page 9 of 18

Project Manager:

Reported:865 E Frontage Rd 8/23/22

Michael Dionne

60 Day Sludge

09/15/22 13:09Rio Rico, AZ 85648

International Boundary and Water Commission(IBWC)

Result Limit

Reporting

Units Level

Spike

Result

Source

%REC

%REC

Limits RPD

RPD

Limit Notes Analyte

Inorganic Chemistry - Quality Control

Legend Technical Services of Arizona, Inc.

Batch B2I0093 - NO PREP

Blank (B2I0093-BLK1) Prepared & Analyzed: 09/02/22

Cyanide, Total mg/kg wet0.010<0.010

LCS (B2I0093-BS1) Prepared & Analyzed: 09/02/22

Cyanide, Total mg/kg wet0.010 0.0500 80-120940.047

LCS Dup (B2I0093-BSD1) Prepared & Analyzed: 09/02/22

Cyanide, Total mg/kg wet0.010 0.0500 2080-12094 00.047

Matrix Spike (B2I0093-MS1) Prepared & Analyzed: 09/02/22 Source: 22H3287-02

Cyanide, Total mg/kg dry0.549 2.75 80-120902.86 0.385

Matrix Spike Dup (B2I0093-MSD1) Prepared & Analyzed: 09/02/22 Source: 22H3287-02

Cyanide, Total mg/kg dry0.549 2.75 2080-12090 02.86 0.385

Batch B2I0123 - NO PREP

Blank (B2I0123-BLK1) Prepared: 09/06/22 Analyzed: 09/07/22

Total Kjeldahl Nitrogen mg/kg wet1.00<1.00

LCS (B2I0123-BS1) Prepared: 09/06/22 Analyzed: 09/07/22

Total Kjeldahl Nitrogen mg/kg wet1.00 5.00 90-1101045.20

LCS Dup (B2I0123-BSD1) Prepared: 09/06/22 Analyzed: 09/07/22

Total Kjeldahl Nitrogen mg/kg wet1.00 5.00 2090-110103 15.14

Matrix Spike (B2I0123-MS1) Prepared: 09/06/22 Analyzed: 09/07/22 Source: 22H3171-01

Total Kjeldahl Nitrogen mg/kg dry5240 26200 M290-1107873800 53400

Legend Technical Services of Arizona, Inc. 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.

Page 10 of 16Page 10 of 18

Project Manager:

Reported:865 E Frontage Rd 8/23/22

Michael Dionne

60 Day Sludge

09/15/22 13:09Rio Rico, AZ 85648

International Boundary and Water Commission(IBWC)

Result Limit

Reporting

Units Level

Spike

Result

Source

%REC

%REC

Limits RPD

RPD

Limit Notes Analyte

Inorganic Chemistry - Quality Control

Legend Technical Services of Arizona, Inc.

Batch B2I0123 - NO PREP

Matrix Spike Dup (B2I0123-MSD1) Prepared: 09/06/22 Analyzed: 09/07/22 Source: 22H3171-01

Total Kjeldahl Nitrogen mg/kg dry5240 26200 2090-110102 880100 53400

Batch B2I0400 - NO PREP

Duplicate (B2I0400-DUP1) Prepared & Analyzed: 09/12/22 Source: 22H3171-01 pH pH Units 10 H50.1646.1 6.1

Temperature °C 200 H50.51219.6 19.5

Legend Technical Services of Arizona, Inc. 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.

Page 11 of 16Page 11 of 18

Project Manager:

Reported:865 E Frontage Rd 8/23/22

Michael Dionne

60 Day Sludge

09/15/22 13:09Rio Rico, AZ 85648

International Boundary and Water Commission(IBWC)

Result Limit

Reporting

Units Level

Spike

Result

Source

%REC

%REC

Limits RPD

RPD

Limit Notes Analyte

SVOC 8270D - Quality Control

Legend Technical Services, Inc.

Batch B2I0108 - EPA 3545A ASE Extraction

Blank (B2I0108-BLK1) Prepared: 09/01/22 Analyzed: 09/02/22

Di(2-ethylhexyl)phthalate mg/kg wet0.33<0.33

LCS (B2I0108-BS1) Prepared: 09/01/22 Analyzed: 09/02/22

1,2,4-Trichlorobenzene mg/kg wet0.33 3.33 50.6-92.668.52.28

1,4-Dichlorobenzene mg/kg wet0.33 3.33 45.4-88.866.22.21

2,4-Dinitrotoluene mg/kg wet0.33 3.33 68.9-10283.92.80

2-Chlorophenol mg/kg wet0.67 3.33 50.3-93.266.52.22

4-Chloro-3-methylphenol mg/kg wet0.67 3.33 60.3-98.882.62.75

4-Nitrophenol mg/kg wet0.67 3.33 52.3-11379.02.63

Anthracene mg/kg wet0.33 3.33 65.3-97.381.62.72

Benzo(a)anthracene mg/kg wet0.33 3.33 64.3-10288.82.96

Benzo(a)pyrene mg/kg wet0.33 3.33 51.1-11372.42.41

Chrysene mg/kg wet0.33 3.33 65.9-10589.22.97

Fluoranthene mg/kg wet0.33 3.33 66-97.681.62.72

Fluorene mg/kg wet0.33 3.33 62.7-95.579.72.66

N-Nitrosodi-n-propylamine mg/kg wet0.33 3.33 50.7-98.472.72.42

Pentachlorophenol mg/kg wet0.67 3.33 40.7-10765.62.19

Phenanthrene mg/kg wet0.33 3.33 65.5-10085.72.86

Phenol mg/kg wet0.67 3.33 49.5-90.668.12.27

Legend Technical Services of Arizona, Inc. 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.

Page 12 of 16Page 12 of 18

Project Manager:

Reported:865 E Frontage Rd 8/23/22

Michael Dionne

60 Day Sludge

09/15/22 13:09Rio Rico, AZ 85648

International Boundary and Water Commission(IBWC)

Result Limit

Reporting

Units Level

Spike

Result

Source

%REC

%REC

Limits RPD

RPD

Limit Notes Analyte

SVOC 8270D - Quality Control

Legend Technical Services, Inc.

Batch B2I0108 - EPA 3545A ASE Extraction

Matrix Spike (B2I0108-MS1) Prepared: 09/01/22 Analyzed: 09/03/22 Source: 2203858-01

1,2,4-Trichlorobenzene mg/kg dry0.38 3.87 40.4-98.275.62.93 <0.38

1,4-Dichlorobenzene mg/kg dry0.38 3.87 34.5-91.571.22.76 <0.38

2,4-Dinitrotoluene mg/kg dry0.38 3.87 61.4-10395.43.70 <0.38

2-Chlorophenol mg/kg dry0.78 3.87 42.4-10377.63.01 <0.78

4-Chloro-3-methylphenol mg/kg dry0.78 3.87 43.6-10391.73.55 <0.78

4-Nitrophenol mg/kg dry0.78 3.87 53.4-10791.73.55 <0.78

Anthracene mg/kg dry0.38 3.87 57.9-10797.33.77 <0.38

Benzo(a)anthracene mg/kg dry0.38 3.87 53.1-1051023.95 <0.38

Benzo(a)pyrene mg/kg dry0.38 3.87 30.7-12182.23.19 <0.38

Chrysene mg/kg dry0.38 3.87 55.7-1121054.08 <0.38

Fluoranthene mg/kg dry0.38 3.87 47-10990.63.51 <0.38

Fluorene mg/kg dry0.38 3.87 54-10188.03.41 <0.38

N-Nitrosodi-n-propylamine mg/kg dry0.38 3.87 47.2-99.584.13.26 <0.38

Pentachlorophenol mg/kg dry0.78 3.87 30-12076.62.97 <0.78

Phenanthrene mg/kg dry0.38 3.87 54.6-1121023.93 <0.38

Phenol mg/kg dry0.78 3.87 46.4-93.778.73.05 <0.78

Matrix Spike Dup (B2I0108-MSD1) Prepared: 09/01/22 Analyzed: 09/03/22 Source: 2203858-01

1,2,4-Trichlorobenzene mg/kg dry0.38 3.87 16.940.4-98.269.5 8.492.69 <0.38

1,4-Dichlorobenzene mg/kg dry0.38 3.87 17.634.5-91.562.5 13.02.42 <0.38

2,4-Dinitrotoluene mg/kg dry0.38 3.87 12.161.4-10388.0 8.043.41 <0.38

2-Chlorophenol mg/kg dry0.78 3.87 14.742.4-10369.4 11.12.69 <0.78

4-Chloro-3-methylphenol mg/kg dry0.78 3.87 10.643.6-10382.5 10.53.20 <0.78

4-Nitrophenol mg/kg dry0.78 3.87 17.353.4-10784.9 7.793.29 <0.78

Anthracene mg/kg dry0.38 3.87 15.257.9-10790.8 6.883.52 <0.38

Benzo(a)anthracene mg/kg dry0.38 3.87 16.853.1-10593.9 8.243.64 <0.38

Benzo(a)pyrene mg/kg dry0.38 3.87 16.830.7-12176.4 7.352.96 <0.38

Chrysene mg/kg dry0.38 3.87 16.455.7-11297.8 7.333.79 <0.38

Fluoranthene mg/kg dry0.38 3.87 18.247-10983.5 8.223.23 <0.38

Fluorene mg/kg dry0.38 3.87 14.854-10183.3 5.503.23 <0.38

N-Nitrosodi-n-propylamine mg/kg dry0.38 3.87 15.947.2-99.577.1 8.702.98 <0.38

Pentachlorophenol mg/kg dry0.78 3.87 2230-12071.8 6.452.78 <0.78

Phenanthrene mg/kg dry0.38 3.87 16.754.6-11292.2 9.633.57 <0.38

Phenol mg/kg dry0.78 3.87 15.446.4-93.769.9 11.92.71 <0.78

Legend Technical Services of Arizona, Inc. 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.

Page 13 of 16Page 13 of 18

Project Manager:

Reported:865 E Frontage Rd 8/23/22

Michael Dionne

60 Day Sludge

09/15/22 13:09Rio Rico, AZ 85648

International Boundary and Water Commission(IBWC)

Result Limit

Reporting

Units Level

Spike

Result

Source

%REC

%REC

Limits RPD

RPD

Limit Notes Analyte

Phosphorus Soluble - Quality Control

Eurofins Phoenix

Batch 282724 - SM 4500 P B

Matrix Spike Dup (1894901D) Prepared: 08/30/22 Analyzed: 08/31/22 Source: 22H3171-01

Total Phosphorus mg/Kg470 14.2 20 M3, D280-120NR 62380 2400

Matrix Spike (1894901S) Prepared: 08/30/22 Analyzed: 08/31/22 Source: 22H3171-01

Total Phosphorus mg/Kg470 14.0 M3, D280-1207772530 2400

Blank (282738-33) Prepared: 08/30/22 Analyzed: 08/31/22

Total Phosphorus mg/Kg4.8 -ND

LCS (282738-34) Prepared: 08/30/22 Analyzed: 08/31/22

Total Phosphorus mg/Kg4.8 14.3 90-11010114.4

LCS Dup (282738-35) Prepared: 08/30/22 Analyzed: 08/31/22

Total Phosphorus mg/Kg4.8 14.3 2090-110102 114.6

Legend Technical Services of Arizona, Inc. 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.

Page 14 of 16Page 14 of 18

Project Manager:

Reported:865 E Frontage Rd 8/23/22

Michael Dionne

60 Day Sludge

09/15/22 13:09Rio Rico, AZ 85648

International Boundary and Water Commission(IBWC)

Notes and Definitions

T5 Laboratory not licensed for this parameter

M3 The spike recovery value is unusable since the analyte concentration in the sample is disproportionate to the spike level. The associated blank spike was acceptable.

M2 Matrix spike recovery was low; the associated blank spike recovery was acceptable.

H5 This test is specified to be performed in the field within 15 minutes of sampling; sample was received and analyzed past the regulatory holding time.

E8 Analyte reported to MDL per project specification. Target analyte was not detected in the sample.

E4 Concentration estimated. Analyte was detected below laboratory minimum reporting level (MRL), but above the MDL.

D2a Sample required dilution due to high concentration of target analyte.

D2 Sample required dilution due to high concentration of analyte.

D1 Sample required dilution due to matrix.

Sample results reported on a dry weight basis

Relative Percent DifferenceRPD

Dry

Matrix Spike/DuplicateMS/Dup

Laboratory Control Sample/Laboratory Fortified Blank/DuplicateLCS/Dup

Method BlankBLK

Legend Technical Services of Arizona, Inc. 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.

Page 15 of 16Page 15 of 18

RE: Annual TCLP Biosolids

Rio Rico, AZ 85648

865 E Frontage Rd

Michael Dionne

Mary Whaley

Client Services Representative

Legend Technical Services of Arizona, Inc. is pleased to provide the enclosed analytical results for the aforementioned project. These results relate only to the items tested. This cover letter and the accompanying pages represent the full report for these analyses and should only be reproduced in full .

Samples for this project were received by the laboratory on 02/02/22 13:20.

The samples were processed in accordance with the Chain of Custody document and the results presented relate only to the samples tested. The Chain of Custody is considered part of this report.

All samples will be retained by LEGEND for 30 days from the date of this report and then discarded unless other arrangements are made. Due to hold-time and method sample volume requirements, microbiological samples are not retained unless other arrangements are made.

This entire report was reviewed and approved for release by the undersigned. If you have any questions concerning this report, please feel free to contact me.

Sincerely, LEGEND TECHNICAL SERVICES OF ARIZONA, INC.

25 February 2022

International Boundary and Water Commission(IBWC)

Laboratory Work Order No.: 22B0419

This laboratory report is confidential and is intended for the sole use of LEGEND and it's client.

(602) 324-6100

4585 S. Palo Verde Rd., Ste. 423 � Tucson, AZ 85714

P (520) 327-1234 � F (520) 327-0518 www.legend-group.com

Project Manager:

Reported:865 E Frontage Rd Landfill Biosolids

Michael Dionne

Annual TCLP Biosolids

02/25/22 15:50Rio Rico, AZ 85648

International Boundary and Water Commission(IBWC)

Sample ID Laboratory ID Matrix Date Sampled

ANALYTICAL REPORT FOR SAMPLES

Date ReceivedType

1600-001-A-AZP 22B0419-01 02/01/22 15:00 02/02/22 13:20Solid Composite

This report contains data that were produced by a subcontracted laboratory certified for the fields of testing performed.

Pace Analytical National (fka ESC) AZ0612

Daphne Richards

800.767.5859

Legend Technical Services, St. Paul AZ0557

Bach Pham

651.221.4062

The recoveries for 8081 TCLP surrogate Decachlorobiphenyl were above acceptable limits in the sample and the batch B2B1522

Blank/LCS/MS/MSD due to the use of a deteriorated standard. The recoveries for Endrin were above acceptable limits in the 8081 TCLP batch B2B1522 MS/MSD due to the use of a deteriorated standard. The MS/MSD source sample was 22B0419-01.

Case Narrative:

Holding Times: All holding times were met unless otherwise qualified.

QA/QC Criteria: All analyses met method requirements unless otherwise qualified.

Certifications: AZ(PHX)0004, AZ(TUC)OOO4, AIHA#102982, CDC ELITE Member.

Accreditation is applicable only to the test methods specified on each scope of accreditation held by LEGEND.

Comments: There were no problems encountered during the processing of the samples, unless otherwise noted.

All samples were analyzed on a "wet" basis unless designated as "dry weight".

Containers Intact

Custody Seals

COC/Labels Agree Preservation Confirmed

Received On Ice

4.40°CSamples Received at:

No

No

No

No

No

Sample Condition Upon Receipt:

Temperature: 4.40 C

All samples were received in acceptable condition unless noted otherwise in the case narrative.

Legend Technical Services of Arizona, Inc. 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.

Laboratory Work Order No.: 22B0419

Page 2 of 16Page 2 of 18

Project Manager:

Reported:865 E Frontage Rd Landfill Biosolids

Michael Dionne

Annual TCLP Biosolids

02/25/22 15:50Rio Rico, AZ 85648

International Boundary and Water Commission(IBWC)

ResultAnalyte PQL Batch Prepared Analyzed Method Notes DilutionUnits

1600-001-A-AZP (22B0419-01) Solid (Composite) Sampled: 02/01/22 15:00 Received: 02/02/22 13:20

Legend Technical Services, Inc. #AZ0557

TCLP SVOC

EPA 1311/8270Dmg/L B2B152110.10<0.10 02/15/22 08:42 02/18/22 05:252,4,5-Trichlorophenol

EPA 1311/8270Dmg/L B2B152110.10<0.10 02/15/22 08:42 02/18/22 05:252,4,6-Trichlorophenol

EPA 1311/8270Dmg/L B2B152110.10<0.10 02/15/22 08:42 02/18/22 05:252,4-Dinitrotoluene

EPA 1311/8270Dmg/L B2B152110.10<0.10 02/15/22 08:42 02/18/22 05:252-Methylphenol

EPA 1311/8270Dmg/L B2B152110.20<0.20 02/15/22 08:42 02/18/22 05:253&4-Methylphenol

EPA 1311/8270Dmg/L B2B152110.10<0.10 02/15/22 08:42 02/18/22 05:25Hexachlorobenzene

EPA 1311/8270Dmg/L B2B152110.10<0.10 02/15/22 08:42 02/18/22 05:25Hexachlorobutadiene

EPA 1311/8270Dmg/L B2B152110.10<0.10 02/15/22 08:42 02/18/22 05:25Hexachloroethane

EPA 1311/8270Dmg/L B2B152110.10<0.10 02/15/22 08:42 02/18/22 05:25Nitrobenzene

EPA 1311/8270Dmg/L B2B152110.10<0.10 02/15/22 08:42 02/18/22 05:25Pentachlorophenol

EPA 1311/8270Dmg/L B2B152110.10<0.10 02/15/22 08:42 02/18/22 05:25Pyridine

Surrogate: 2,4,6-Tribromophenol EPA

1311/8270D

B2B1521 02/15/22 02/18/22 61.9-15599.2 %

Surrogate: 2-Fluorobiphenyl EPA

1311/8270D

B2B1521 02/15/22 02/18/22 45-90.265.2 %

Surrogate: 2-Fluorophenol EPA

1311/8270D

B2B1521 02/15/22 02/18/22 30-78.443.3 %

Surrogate: Nitrobenzene-d5 EPA

1311/8270D

B2B1521 02/15/22 02/18/22 41.9-94.470.8 %

Surrogate: Phenol-d6 EPA

1311/8270D

B2B1521 02/15/22 02/18/22 30-78.750.5 %

Surrogate: Terphenyl-d14 EPA

1311/8270D

B2B1521 02/15/22 02/18/22 58-12079.6 %

TCLP PESTICIDES

EPA 1311/8081Bmg/L B2B152210.0040<0.0040 02/15/22 08:46 02/16/22 16:05alpha-Chlordane

EPA 1311/8081Bmg/L B2B152210.0080<0.0080 02/15/22 08:46 02/16/22 16:05Chlordane (tech)

EPA 1311/8081Bmg/L B2B152210.0040 L3<0.0040 02/15/22 08:46 02/16/22 16:05Endrin

EPA 1311/8081Bmg/L B2B152210.0040<0.0040 02/15/22 08:46 02/16/22 16:05gamma-BHC (Lindane)

EPA 1311/8081Bmg/L B2B152210.0040<0.0040 02/15/22 08:46 02/16/22 16:05gamma-Chlordane

EPA 1311/8081Bmg/L B2B152210.0040<0.0040 02/15/22 08:46 02/16/22 16:05Heptachlor

EPA 1311/8081Bmg/L B2B152210.0040<0.0040 02/15/22 08:46 02/16/22 16:05Heptachlor epoxide

EPA 1311/8081Bmg/L B2B152210.0040<0.0040 02/15/22 08:46 02/16/22 16:05Methoxychlor

EPA 1311/8081Bmg/L B2B152210.010<0.010 02/15/22 08:46 02/16/22 16:05Toxaphene

Surrogate: Decachlorobiphenyl EPA

1311/8081B

B2B1522 02/15/22 02/16/22 N166.5-121132 %

Surrogate: Tetrachloro-meta-xylene EPA

1311/8081B

B2B1522 02/15/22 02/16/22 61-11579.0 %

Legend Technical Services of Arizona, Inc. 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.

Page 3 of 16Page 3 of 18

Project Manager:

Reported:865 E Frontage Rd Landfill Biosolids

Michael Dionne

Annual TCLP Biosolids

02/25/22 15:50Rio Rico, AZ 85648

International Boundary and Water Commission(IBWC)

ResultAnalyte PQL Batch Prepared Analyzed Method Notes DilutionUnits

1600-001-A-AZP (22B0419-01) Solid (Composite) Sampled: 02/01/22 15:00 Received: 02/02/22 13:20

Legend Technical Services of Arizona, Inc.

TCLP

EPA 8260B/EPA

mg/L B2B0343100.0200<0.0200 02/10/22 11:30 02/10/22 13:561,1-Dichloroethene

EPA 8260B/EPA

mg/L B2B0343100.0200<0.0200 02/10/22 11:30 02/10/22 13:561,2-Dichloroethane

EPA 8260B/EPA

mg/L B2B0343100.0200<0.0200 02/10/22 11:30 02/10/22 13:561,4-Dichlorobenzene

EPA 8260B/EPA

mg/L B2B0343100.100<0.100 02/10/22 11:30 02/10/22 13:562-Butanone

EPA 8260B/EPA

mg/L B2B0343100.0200<0.0200 02/10/22 11:30 02/10/22 13:56Benzene

EPA 8260B/EPA

mg/L B2B0343100.0200<0.0200 02/10/22 11:30 02/10/22 13:56Carbon tetrachloride

EPA 8260B/EPA

mg/L B2B0343100.0200<0.0200 02/10/22 11:30 02/10/22 13:56Chlorobenzene

EPA 8260B/EPA

mg/L B2B0343100.0200<0.0200 02/10/22 11:30 02/10/22 13:56Chloroform

EPA 8260B/EPA

mg/L B2B0343100.0200<0.0200 02/10/22 11:30 02/10/22 13:56Tetrachloroethene

EPA 8260B/EPA

mg/L B2B0343100.0200<0.0200 02/10/22 11:30 02/10/22 13:56Trichloroethene

EPA 8260B/EPA

mg/L B2B0343100.00500<0.00500 02/10/22 11:30 02/10/22 13:56Vinyl chloride

Surrogate: 1,2-Dichlorobenzene-d4 EPA

8260B/EPA

B2B0343 02/10/22 02/10/22 80-120114 %

Surrogate: 1,2-Dichloroethane-d4 EPA

8260B/EPA

B2B0343 02/10/22 02/10/22 80-12094 %

Surrogate: 4-Bromofluorobenzene EPA

8260B/EPA

B2B0343 02/10/22 02/10/22 78-12084 %

Surrogate: Pentafluorobenzene EPA

8260B/EPA

B2B0343 02/10/22 02/10/22 80-120103 %

EPA

6010C/EPA1311

mg/L B2B025610.20<0.20 02/08/22 16:23 02/09/22 18:26Arsenic

EPA

6010C/EPA1311

B2B0256mg/L 10.0100.12 02/08/22 16:23 02/09/22 18:26Barium

EPA

6010C/EPA1311

mg/L B2B025610.0040<0.0040 02/08/22 16:23 02/09/22 18:26Cadmium

EPA

6010C/EPA1311

mg/L B2B025610.0050<0.0050 02/08/22 16:23 02/09/22 18:26Chromium

EPA

6010C/EPA1311

mg/L B2B025610.10<0.10 02/08/22 16:23 02/09/22 18:26Lead

EPA 7470A/EPA

mg/L B2B035410.0002<0.0002 02/09/22 09:03 02/09/22 14:47Mercury

EPA

6010C/EPA1311

mg/L B2B025610.20<0.20 02/08/22 16:23 02/09/22 18:26Selenium

EPA

6010C/EPA1311

mg/L B2B025610.010<0.010 02/08/22 16:23 02/09/22 18:26Silver

ESC AZ0612

8151ATCLP

8151ATCLPmg/l WG181477610.00200ND 02/09/22 08:49 02/10/22 18:002,4,5-TP (Silvex)

8151ATCLPmg/l WG181477610.00200ND 02/09/22 08:49 02/10/22 18:002,4-D

Legend Technical Services of Arizona, Inc. 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.

Page 4 of 16Page 4 of 18

Project Manager:

Reported:865 E Frontage Rd Landfill Biosolids

Michael Dionne

Annual TCLP Biosolids

02/25/22 15:50Rio Rico, AZ 85648

International Boundary and Water Commission(IBWC)

ResultAnalyte PQL Batch Prepared Analyzed Method Notes DilutionUnits

1600-001-A-AZP (22B0419-01) Solid (Composite) Sampled: 02/01/22 15:00 Received: 02/02/22 13:20

ESC AZ0612

8151ATCLP

Surrogate: 2,4-Dichlorophenyl Acetic Acid 8151ATCLPWG18147

02/09/22 02/10/22 14.0-15867.2 %

Legend Technical Services of Arizona, Inc. 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.

Page 5 of 16Page 5 of 18

Project Manager:

Reported:865 E Frontage Rd Landfill Biosolids

Michael Dionne

Annual TCLP Biosolids

02/25/22 15:50Rio Rico, AZ 85648

International Boundary and Water Commission(IBWC)

Result Limit

Reporting

Units Level

Spike

Result

Source

%REC

%REC

Limits RPD

RPD

Limit Notes Analyte

TCLP - Quality Control

Legend Technical Services of Arizona, Inc.

Batch B2B0256 - TCLP by EPA3010A

Blank (B2B0256-BLK1) Prepared: 02/08/22 Analyzed: 02/09/22

Arsenic mg/L0.20<0.20

Barium mg/L0.010<0.010

Cadmium mg/L0.0040<0.0040

Chromium mg/L0.0050<0.0050

Lead mg/L0.10<0.10

Selenium mg/L0.20<0.20

Silver mg/L0.010<0.010

Blank (B2B0256-BLK2) Prepared: 02/08/22 Analyzed: 02/09/22

Arsenic mg/L0.20<0.20

Barium mg/L0.010<0.010

Cadmium mg/L0.0040<0.0040

Chromium mg/L0.0050<0.0050

Lead mg/L0.10<0.10

Selenium mg/L0.20<0.20

Silver mg/L0.010<0.010

LCS (B2B0256-BS1) Prepared: 02/08/22 Analyzed: 02/09/22

Arsenic mg/L0.20 2.00 80-120982.0

Barium mg/L0.010 1.00 80-1201011.0

Cadmium mg/L0.0040 0.400 80-120970.39

Chromium mg/L0.0050 0.500 80-120980.49

Lead mg/L0.10 1.00 80-120960.96

Selenium mg/L0.20 1.00 80-120940.94

Silver mg/L0.010 0.500 80-1201030.51

LCS Dup (B2B0256-BSD1) Prepared: 02/08/22 Analyzed: 02/09/22

Arsenic mg/L0.20 2.00 2080-12099 12.0

Barium mg/L0.010 1.00 2080-120101 0.021.0

Cadmium mg/L0.0040 0.400 2080-12098 0.50.39

Chromium mg/L0.0050 0.500 2080-12098 0.50.49

Lead mg/L0.10 1.00 2080-12097 0.90.97

Selenium mg/L0.20 1.00 2080-12094 0.20.94

Silver mg/L0.010 0.500 2080-120105 20.53

Legend Technical Services of Arizona, Inc. 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.

Page 6 of 16Page 6 of 18

Project Manager:

Reported:865 E Frontage Rd Landfill Biosolids

Michael Dionne

Annual TCLP Biosolids

02/25/22 15:50Rio Rico, AZ 85648

International Boundary and Water Commission(IBWC)

Result Limit

Reporting

Units Level

Spike

Result

Source

%REC

%REC

Limits RPD

RPD

Limit Notes Analyte

TCLP - Quality Control

Legend Technical Services of Arizona, Inc.

Batch B2B0256 - TCLP by EPA3010A

Matrix Spike (B2B0256-MS1) Prepared: 02/08/22 Analyzed: 02/09/22 Source: 22B0419-01

Arsenic mg/L0.20 2.00 75-1251062.1 0.018

Barium mg/L0.010 1.00 75-1251041.2 0.12

Cadmium mg/L0.0040 0.400 75-125940.38 0.0009

Chromium mg/L0.0050 0.500 75-125970.49 0.0035

Lead mg/L0.10 1.00 75-125930.93 <0.10

Selenium mg/L0.20 1.00 75-1251031.0 0.012

Silver mg/L0.010 0.500 75-1251100.55 <0.010

Matrix Spike Dup (B2B0256-MSD1) Prepared: 02/08/22 Analyzed: 02/09/22 Source: 22B0419-01

Arsenic mg/L0.20 2.00 2075-125106 0.72.1 0.018

Barium mg/L0.010 1.00 2075-125104 0.031.2 0.12

Cadmium mg/L0.0040 0.400 2075-12594 00.38 0.0009

Chromium mg/L0.0050 0.500 2075-12597 0.20.49 0.0035

Lead mg/L0.10 1.00 2075-12592 0.40.92 <0.10

Selenium mg/L0.20 1.00 2075-125104 11.1 0.012

Silver mg/L0.010 0.500 2075-125111 0.020.55 <0.010

Batch B2B0343 - Default Prep VOC

Blank (B2B0343-BLK1) Prepared & Analyzed: 02/10/22

1,1-Dichloroethene mg/L0.0200<0.0200

1,2-Dichloroethane mg/L0.0200<0.0200

1,4-Dichlorobenzene mg/L0.0200<0.0200

2-Butanone mg/L0.100<0.100

Benzene mg/L0.0200<0.0200

Carbon tetrachloride mg/L0.0200<0.0200

Chlorobenzene mg/L0.0200<0.0200

Chloroform mg/L0.0200<0.0200

Tetrachloroethene mg/L0.0200<0.0200

Trichloroethene mg/L0.0200<0.0200

Vinyl chloride mg/L0.00500<0.00500

Legend Technical Services of Arizona, Inc. 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.

Page 7 of 16Page 7 of 18

Project Manager:

Reported:865 E Frontage Rd Landfill Biosolids

Michael Dionne

Annual TCLP Biosolids

02/25/22 15:50Rio Rico, AZ 85648

International Boundary and Water Commission(IBWC)

Result Limit

Reporting

Units Level

Spike

Result

Source

%REC

%REC

Limits RPD

RPD

Limit Notes Analyte

TCLP - Quality Control

Legend Technical Services of Arizona, Inc.

Batch B2B0343 - Default Prep VOC

LCS (B2B0343-BS1) Prepared & Analyzed: 02/10/22

1,1-Dichloroethene mg/L0.00200 0.0100 80-120890.00886

1,2-Dichloroethane mg/L0.00200 0.0100 80-120980.00982

1,4-Dichlorobenzene mg/L0.00200 0.0100 80-1201000.0100

2-Butanone mg/L0.0100 0.0400 72-1201120.0446

Benzene mg/L0.00200 0.0100 80-120970.00965

Carbon tetrachloride mg/L0.00200 0.0100 76-127970.00973

Chlorobenzene mg/L0.00200 0.0100 80-120970.00973

Chloroform mg/L0.00200 0.0100 80-120960.00955

Tetrachloroethene mg/L0.00200 0.0100 80-120930.00929

Trichloroethene mg/L0.00200 0.0100 80-120970.00969

Vinyl chloride mg/L0.000500 0.0100 75-123870.00873

LCS Dup (B2B0343-BSD1) Prepared & Analyzed: 02/10/22

1,1-Dichloroethene mg/L0.00200 0.0100 2080-12090 20.00901

1,2-Dichloroethane mg/L0.00200 0.0100 2080-12095 30.00950

1,4-Dichlorobenzene mg/L0.00200 0.0100 2080-120102 10.0102

2-Butanone mg/L0.0100 0.0400 2072-120102 90.0406

Benzene mg/L0.00200 0.0100 2080-12096 0.90.00956

Carbon tetrachloride mg/L0.00200 0.0100 2076-12797 0.80.00965

Chlorobenzene mg/L0.00200 0.0100 2080-12098 0.70.00980

Chloroform mg/L0.00200 0.0100 2080-12093 20.00932

Tetrachloroethene mg/L0.00200 0.0100 2080-12092 10.00919

Trichloroethene mg/L0.00200 0.0100 2080-12096 0.70.00962

Vinyl chloride mg/L0.000500 0.0100 2075-12390 30.00901

Legend Technical Services of Arizona, Inc. 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.

Page 8 of 16Page 8 of 18

Project Manager:

Reported:865 E Frontage Rd Landfill Biosolids

Michael Dionne

Annual TCLP Biosolids

02/25/22 15:50Rio Rico, AZ 85648

International Boundary and Water Commission(IBWC)

Result Limit

Reporting

Units Level

Spike

Result

Source

%REC

%REC

Limits RPD

RPD

Limit Notes Analyte

TCLP - Quality Control

Legend Technical Services of Arizona, Inc.

Batch B2B0343 - Default Prep VOC

Matrix Spike (B2B0343-MS1) Prepared & Analyzed: 02/10/22 Source: 22A3489-01

1,1-Dichloroethene mg/L0.0200 0.100 80-120990.0990 <0.0200

1,2-Dichloroethane mg/L0.0200 0.100 80-120980.0980 <0.0200

1,4-Dichlorobenzene mg/L0.0200 0.100 80-1201060.106 <0.0200

2-Butanone mg/L0.100 0.400 77-120990.458 0.0638

Benzene mg/L0.0200 0.100 80-1201030.103 <0.0200

Carbon tetrachloride mg/L0.0200 0.100 79-1221070.107 <0.0200

Chlorobenzene mg/L0.0200 0.100 80-1201050.105 <0.0200

Chloroform mg/L0.0200 0.100 72-1311030.103 <0.0200

Tetrachloroethene mg/L0.0200 0.100 80-120980.0984 <0.0200

Trichloroethene mg/L0.0200 0.100 80-1201030.103 <0.0200

Vinyl chloride mg/L0.00500 0.100 73-129920.0921 <0.00500

Matrix Spike Dup (B2B0343-MSD1) Prepared & Analyzed: 02/10/22 Source: 22A3489-01

1,1-Dichloroethene mg/L0.0200 0.100 2080-12099 0.10.0989 <0.0200

1,2-Dichloroethane mg/L0.0200 0.100 2080-12096 20.0964 <0.0200

1,4-Dichlorobenzene mg/L0.0200 0.100 2080-120104 20.104 <0.0200

2-Butanone mg/L0.100 0.400 2077-12093 50.436 0.0638

Benzene mg/L0.0200 0.100 2080-120104 10.104 <0.0200

Carbon tetrachloride mg/L0.0200 0.100 2079-122107 0.60.107 <0.0200

Chlorobenzene mg/L0.0200 0.100 2080-120104 0.20.104 <0.0200

Chloroform mg/L0.0200 0.100 2072-131103 00.103 <0.0200

Tetrachloroethene mg/L0.0200 0.100 2080-120100 20.0999 <0.0200

Trichloroethene mg/L0.0200 0.100 2080-120104 0.90.104 <0.0200

Vinyl chloride mg/L0.00500 0.100 2073-12997 50.0970 <0.00500

Legend Technical Services of Arizona, Inc. 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.

Page 9 of 16Page 9 of 18

Project Manager:

Reported:865 E Frontage Rd Landfill Biosolids

Michael Dionne

Annual TCLP Biosolids

02/25/22 15:50Rio Rico, AZ 85648

International Boundary and Water Commission(IBWC)

Result Limit

Reporting

Units Level

Spike

Result

Source

%REC

%REC

Limits RPD

RPD

Limit Notes Analyte

TCLP - Quality Control

Legend Technical Services of Arizona, Inc.

Batch B2B0354 - EPA 7470A Prep

Blank (B2B0354-BLK1) Prepared & Analyzed: 02/09/22

Mercury mg/L0.0002<0.0002

Blank (B2B0354-BLK2) Prepared & Analyzed: 02/09/22

Mercury mg/L0.0002<0.0002

LCS (B2B0354-BS1) Prepared & Analyzed: 02/09/22

Mercury mg/L0.0002 0.00100 80-1201020.0010

LCS Dup (B2B0354-BSD1) Prepared & Analyzed: 02/09/22

Mercury mg/L0.0002 0.00100 2080-120101 10.0010

Matrix Spike (B2B0354-MS1) Prepared & Analyzed: 02/09/22 Source: 22B0419-01

Mercury mg/L0.0002 0.00100 75-1251030.0010 <0.0002

Matrix Spike Dup (B2B0354-MSD1) Prepared & Analyzed: 02/09/22 Source: 22B0419-01

Mercury mg/L0.0002 0.00100 2075-125102 10.0010 <0.0002

Legend Technical Services of Arizona, Inc. 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.

Page 10 of 16Page 10 of 18

Project Manager:

Reported:865 E Frontage Rd Landfill Biosolids

Michael Dionne

Annual TCLP Biosolids

02/25/22 15:50Rio Rico, AZ 85648

International Boundary and Water Commission(IBWC)

Result Limit

Reporting

Units Level

Spike

Result

Source

%REC

%REC

Limits RPD

RPD

Limit Notes Analyte

TCLP SVOC - Quality Control

Legend Technical Services, Inc.

Batch B2B1521 - EPA 3510C (Sep Funnel)

Blank (B2B1521-BLK1) Prepared: 02/15/22 Analyzed: 02/17/22

2,4,5-Trichlorophenol mg/L0.10<0.10

2,4,6-Trichlorophenol mg/L0.10<0.10

2,4-Dinitrotoluene mg/L0.10<0.10

2-Methylphenol mg/L0.10<0.10

3&4-Methylphenol mg/L0.20<0.20

Hexachlorobenzene mg/L0.10<0.10

Hexachlorobutadiene mg/L0.10<0.10

Hexachloroethane mg/L0.10<0.10

Nitrobenzene mg/L0.10<0.10

Pentachlorophenol mg/L0.10<0.10

Pyridine mg/L0.10<0.10

LCS (B2B1521-BS1) Prepared: 02/15/22 Analyzed: 02/18/22

2,4,5-Trichlorophenol mg/L0.10 0.500 56.2-11074.30.371

2,4,6-Trichlorophenol mg/L0.10 0.500 71.2-96.980.50.403

2,4-Dinitrotoluene mg/L0.10 0.500 67.2-10180.50.403

2-Methylphenol mg/L0.10 0.500 56.5-88.877.50.388

3&4-Methylphenol mg/L0.20 1.00 48-87.865.20.652

Hexachlorobenzene mg/L0.10 0.500 70.1-11898.90.494

Hexachlorobutadiene mg/L0.10 0.500 61.6-97.571.50.358

Hexachloroethane mg/L0.10 0.500 55.3-92.968.00.340

Nitrobenzene mg/L0.10 0.500 37-10057.90.290

Pentachlorophenol mg/L0.10 0.500 64.1-11991.70.458

Legend Technical Services of Arizona, Inc. 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.

Page 11 of 16Page 11 of 18

Project Manager:

Reported:865 E Frontage Rd Landfill Biosolids

Michael Dionne

Annual TCLP Biosolids

02/25/22 15:50Rio Rico, AZ 85648

International Boundary and Water Commission(IBWC)

Result Limit

Reporting

Units Level

Spike

Result

Source

%REC

%REC

Limits RPD

RPD

Limit Notes Analyte

TCLP SVOC - Quality Control

Legend Technical Services, Inc.

Batch B2B1521 - EPA 3510C (Sep Funnel)

Matrix Spike (B2B1521-MS1) Prepared: 02/15/22 Analyzed: 02/18/22 Source: 2200668-01

2,4,5-Trichlorophenol mg/L0.10 0.500 52.2-11376.50.382 <0.10

2,4,6-Trichlorophenol mg/L0.10 0.500 56.7-10981.50.408 <0.10

2,4-Dinitrotoluene mg/L0.10 0.500 63.9-11083.10.416 <0.10

2-Methylphenol mg/L0.10 0.500 51.7-93.578.40.392 <0.10

3&4-Methylphenol mg/L0.20 1.00 30-10164.00.640 <0.20

Hexachlorobenzene mg/L0.10 0.500 64.6-12099.70.499 <0.10

Hexachlorobutadiene mg/L0.10 0.500 50.2-10669.70.349 <0.10

Hexachloroethane mg/L0.10 0.500 46.4-98.465.10.326 <0.10

Nitrobenzene mg/L0.10 0.500 38.2-98.258.60.293 <0.10

Pentachlorophenol mg/L0.10 0.500 52.6-13795.20.476 <0.10

Matrix Spike Dup (B2B1521-MSD1) Prepared: 02/15/22 Analyzed: 02/18/22 Source: 2200668-01

2,4,5-Trichlorophenol mg/L0.10 0.500 17.352.2-11371.7 6.450.359 <0.10

2,4,6-Trichlorophenol mg/L0.10 0.500 15.156.7-10978.2 4.220.391 <0.10

2,4-Dinitrotoluene mg/L0.10 0.500 15.463.9-11075.6 9.460.378 <0.10

2-Methylphenol mg/L0.10 0.500 18.351.7-93.578.2 0.3060.391 <0.10

3&4-Methylphenol mg/L0.20 1.00 16.530-10164.2 0.2690.642 <0.20

Hexachlorobenzene mg/L0.10 0.500 14.564.6-12094.9 4.990.474 <0.10

Hexachlorobutadiene mg/L0.10 0.500 18.250.2-10669.5 0.2750.348 <0.10

Hexachloroethane mg/L0.10 0.500 15.646.4-98.466.1 1.410.330 <0.10

Nitrobenzene mg/L0.10 0.500 13.438.2-98.258.1 0.8840.291 <0.10

Pentachlorophenol mg/L0.10 0.500 17.352.6-13789.5 6.200.447 <0.10

Legend Technical Services of Arizona, Inc. 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.

Page 12 of 16Page 12 of 18

Project Manager:

Reported:865 E Frontage Rd Landfill Biosolids

Michael Dionne

Annual TCLP Biosolids

02/25/22 15:50Rio Rico, AZ 85648

International Boundary and Water Commission(IBWC)

Result Limit

Reporting

Units Level

Spike

Result

Source

%REC

%REC

Limits RPD

RPD

Limit Notes Analyte

TCLP PESTICIDES - Quality Control

Legend Technical Services, Inc.

Batch B2B1522 - EPA 3510C (Sep Funnel)

Blank (B2B1522-BLK1) Prepared & Analyzed: 02/15/22 alpha-Chlordane mg/L0.0040<0.0040

Chlordane (tech) mg/L0.0080<0.0080

Endrin mg/L0.0040 L3<0.0040 gamma-BHC (Lindane) mg/L0.0040<0.0040 gamma-Chlordane mg/L0.0040<0.0040

Heptachlor mg/L0.0040<0.0040

Heptachlor epoxide mg/L0.0040<0.0040

Methoxychlor mg/L0.0040<0.0040

Toxaphene mg/L0.010<0.010

LCS (B2B1522-BS1) Prepared: 02/15/22 Analyzed: 02/16/22 alpha-Chlordane mg/L0.0040 0.0125 70-1301020.0128

Endrin mg/L0.0040 0.0125 L370-1301330.0166 gamma-BHC (Lindane) mg/L0.0040 0.0125 70-1301040.0130 gamma-Chlordane mg/L0.0040 0.0125 70-1301020.0128

Heptachlor mg/L0.0040 0.0125 70-13098.00.0122

Heptachlor epoxide mg/L0.0040 0.0125 70-1301000.0126

Methoxychlor mg/L0.0040 0.0125 70-1301050.0131

Matrix Spike (B2B1522-MS1) Prepared: 02/15/22 Analyzed: 02/18/22 Source: 22B0419-01 alpha-Chlordane mg/L0.0040 0.0125 70-1301030.0128 <0.0040

Endrin mg/L0.0040 0.0125 N170-1301380.0172 <0.0040 gamma-BHC (Lindane) mg/L0.0040 0.0125 70-1301070.0134 <0.0040 gamma-Chlordane mg/L0.0040 0.0125 70-1301020.0128 <0.0040

Heptachlor mg/L0.0040 0.0125 70-1301000.0126 <0.0040

Heptachlor epoxide mg/L0.0040 0.0125 70-1301020.0127 <0.0040

Methoxychlor mg/L0.0040 0.0125 70-1301120.0140 <0.0040

Legend Technical Services of Arizona, Inc. 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.

Page 13 of 16Page 13 of 18

Project Manager:

Reported:865 E Frontage Rd Landfill Biosolids

Michael Dionne

Annual TCLP Biosolids

02/25/22 15:50Rio Rico, AZ 85648

International Boundary and Water Commission(IBWC)

Result Limit

Reporting

Units Level

Spike

Result

Source

%REC

%REC

Limits RPD

RPD

Limit Notes Analyte

TCLP PESTICIDES - Quality Control

Legend Technical Services, Inc.

Batch B2B1522 - EPA 3510C (Sep Funnel)

Matrix Spike Dup (B2B1522-MSD1) Prepared: 02/15/22 Analyzed: 02/16/22 Source: 22B0419-01 alpha-Chlordane mg/L0.0040 0.0125 9.6970-130107 4.190.0134 <0.0040

Endrin mg/L0.0040 0.0125 8.37 N170-130144 3.980.0180 <0.0040 gamma-BHC (Lindane) mg/L0.0040 0.0125 11.570-130111 3.300.0138 <0.0040 gamma-Chlordane mg/L0.0040 0.0125 9.0270-130106 3.830.0133 <0.0040

Heptachlor mg/L0.0040 0.0125 1270-130105 4.670.0132 <0.0040

Heptachlor epoxide mg/L0.0040 0.0125 13.370-130106 4.620.0133 <0.0040

Methoxychlor mg/L0.0040 0.0125 8.3470-130120 6.870.0150 <0.0040

Legend Technical Services of Arizona, Inc. 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.

Page 14 of 16Page 14 of 18

Project Manager:

Reported:865 E Frontage Rd Landfill Biosolids

Michael Dionne

Annual TCLP Biosolids

02/25/22 15:50Rio Rico, AZ 85648

International Boundary and Water Commission(IBWC)

Notes and Definitions

P RPD between the primary and confirmatory analysis exceeded 40%

N1 See case narrative.

L3 The associated blank spike recovery was above method acceptance limits.

Sample results reported on a dry weight basis

Relative Percent DifferenceRPD

Dry

Matrix Spike/DuplicateMS/Dup

Laboratory Control Sample/Laboratory Fortified Blank/DuplicateLCS/Dup

Method BlankBLK

Legend Technical Services of Arizona, Inc. 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.

Page 15 of 16Page 15 of 18