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Home My WebLink AboutPARKS_Soil and Dust Testing Update_OCHCA_2024.02.22February 22, 2024 Soil and Dust Testing Update for the Navy North Hangar Fire Soil and dust sampling has been conducted in the community near the Navy North Hangar site to provide information on pollutants in the soil and on surfaces. Any questions regarding the data below should be directed to the call center at (714)-426-2444 or through email at envirohealthunit@tus�nca.org. What Was Measured in the Soil and Dust? Initial testing of soil and dust focused on evaluating heavy metals, specifically lead. For short periods of time on November 7, 2023, air monitoring performed by South Coast Air Quality Management District showed elevated levels of lead and arsenic inside the area of the smoke plume. Subsequent air testing conducted since the early days of the fire has not detected increased levels of lead nor arsenic. Additionally, the City of Tustin has commissioned further testing for asbestos, lead, and ash/soot from the interior and exterior of residential homes. More information about this testing can be found in the informational webinar posted January 31, 2024: https://www.youtube.com/watch?v=toj-7rey_WM SOIL AND DUST TESTING REPORTS & RESOURCES AS OF FEBUARY 22, 2024 Soil Tes�ng Between November 9, 2023, and December 27, 2023, Orange County Health Care Agency collected 24 soil samples for lead analysis at multiple public locations adjacent to the Navy North Hangar site. Sampling locations included Heritage Elementary, Legacy Magnet Academy, OC Sheriffs Regional Training Academy, Montgomery Park, OC Rescue Mission, Columbus Square, Montgomery Park, and Arlington Park. Lead concentrations in all soil samples were below residential screening levels for lead in soil.1,2 A summary of results and the laboratory reports for these soil samples can be found in Attachment A. In addition, on December 27, 2023, the U.S. EPA collected 15 soil samples from Columbus Square, Montgomery Park, and Arlington Park. Samples were analyzed for the following metals: antimony, arsenic, barium, beryllium, cadmium, chromium, cobalt, copper, lead, molybdenum, nickel, selenium, silver, thallium, vanadium, and zinc. The concentrations of detected metals in all samples were below residential screening levels or were within typical background concentrations.3,4 Laboratory reports for these soil samples can be found in Attachment B. Dust Tes�ng Between November 9, 2023, and December 27, 2023, OC Health Care Agency collected 38 dust samples from various surfaces in the community near the Hangar site, which were analyzed in the laboratory for lead. Sampling locations included Heritage Elementary, Legacy Magnet Academy, OC Sheriffs Regional Training Academy, Montgomery Park, OC Rescue Mission, Columbus Square, Montgomery Park, and Arlington Park. Lead concentrations in these dust samples were below the residential screening level for lead in dust on surfaces.2 A summary of results and the laboratory reports for these dust samples can be found in Attachment A. 1 DTSC, 2024: htps://dtsc.ca.gov/faq/what-are-acceptable-concentra�ons-of-lead-in-soil-in-california/ 2 Title 17, California Code Of Regula�ons, Division 1, Chapter 8 Accredita�on, Cer�fica�on, and Work Prac�ces For Lead-Based Paint and Lead Hazards: htps://www.cdph.ca.gov/Programs/CCDPHP/DEODC/CLPPB/CDPH%20Document%20Library/Title%2017.pdf 3 EPA Regional Screening Levels for Residen�al Soil: htps://semspub.epa.gov/src/document/HQ/404334 4 ATSDR Toxicological Profile for Arsenic: htps://www.atsdr.cdc.gov/ToxProfiles/tp2.pdf Attachment A Orange County Health Care Agency Lead Soil and Dust Testing Summary Spreadsheet and Laboratory Reports DATE NAME ADDRESS DUST SAMPLING LOCATION DUST RESULTS (LEAD)DUST THRESHOLD LEVEL (CCR Title 17 ‐ 400 ug/ft2)SOIL SAMPLING LOCATION SOIL RESULT (LEAD)SOIL THRESHOLD LEVEL (DTSC‐80PPM & Title 17 ‐ 400PPM)11/9/2023 Heritage Elementary 15400 Landsdowne Road, Tustin CA 92782 Exterior Building 300 Gate Entry ‐ Side A ‐ Floor 10.3 ug/ft2 Below Dripline Building 300 ‐ Side A 17.1 ppm Below11/9/2023 Heritage Elementary 15400 Landsdowne Road, Tustin CA 92782 Exterior Classroom 301 Entry ‐ Side A ‐ Floor 9.56 ug/ft2 Below Garden ‐ Side A 25.6 ppm Below11/9/2023 Heritage Elementary 15400 Landsdowne Road, Tustin CA 92782 Exterior Classroom 608 Entry ‐ Side A‐ Floor 12.9 ug/ft2 Below Pumpkin Patch ‐ Side A 13.6 ppm Below11/9/2023 Legacy Magnet Academy 15500 Legacy Road, Tustin CA 92782 Exterior School Room 2‐126 ‐ Side C ‐ Window Sill 2.41 ug/ft2 Below Baseball Field ‐ Side D <9.88 ppm Below11/9/2023 Legacy Magnet Academy 15500 Legacy Road, Tustin CA 92782 Exterior School Room 2‐126 ‐ Side D ‐ Floor < 5.00 ug/ft2 Below Fenceline ‐ Side D 14.9 ppm Below11/9/2023 Legacy Magnet Academy 15500 Legacy Road, Tustin CA 92782 Exterior School Room 2‐126 ‐ Side C ‐ Floor < 5.00 ug/ft2 Below11/9/2023 Legacy Magnet Academy 15500 Legacy Road, Tustin CA 92782 Exterior School Room 2‐126 ‐ Side A ‐ Window Sill 5.37 ug/ft2 Below11/10/2023 OC Sheriffs Regional Training Academy 15991 Armstrong Avenue, Tustin CA 92782 Exterior Parking Lot Runoff ‐ Side A ‐ Floor < 5.00 ug/ft2 Below Parkling Lot Near Fire Hydrant ‐ Side A 14.5 ppm Below11/10/2023 OC Sheriffs Regional Training Academy 15991 Armstrong Avenue, Tustin CA 92782 Exterior Office ‐ Side D ‐ Window Sill 5.31 ug/ft2 Below Parking Lot Adjacent to Boulders ‐ Side A 10.2 ppm Below11/10/2023 OC Sheriffs Regional Training Academy 15991 Armstrong Avenue, Tustin CA 92782 Exterior Parking Lot Left ‐ Side A ‐ Floor 5.15 ug/ft2 Below11/10/2023 OC Sheriffs Regional Training Academy 15991 Armstrong Avenue, Tustin CA 92782 Exterior Office ‐ Side A ‐ Window Sill <5.08 ug/ft2 Below11/10/2023 Montgomery Park 1496 Montgomery Street, Tustin CA 92782 Exterior Picnic Area ‐ Side C ‐ Table Top <5.00 ug/ft2 Below Flowerbed Next to Jungle Gym ‐ Side C 13.4 ppm Below11/10/2023 Montgomery Park 1496 Montgomery Street, Tustin CA 92782 Exterior Basketball Court ‐ Side A ‐ Floor 9.22 ug/ft2 Below11/10/2023 Montgomery Park 1496 Montgomery Street, Tustin CA 92782 Exterior Jungle Gym ‐ Side C ‐ Landing <5.00 ug/ft2 Below11/10/2023 OC Rescue Mission 1 Hope Drive, Tustin CA 92782 Exterior Parking Lot ‐ Side C ‐ Floor <5.00 ug/ft2 Below Fenceline Next to Play Area ‐ Side C 15.6 ppm Below11/10/2023 OC Rescue Mission 1 Hope Drive, Tustin CA 92782 Exterior Parking Lot ‐ Side C ‐ Lamp Post <15.00 ug/ft2 Below12/27/2023 Columbus Square 15214 Columbus Square, Tustin CA 92782 Exterior Fountain ‐ Side D ‐ Ledge <5.00 ug/ft2 Below Tree adjacent to Clubhouse ‐ Side A 14.2 ppm Below12/27/2023 Columbus Square 15214 Columbus Square, Tustin CA 92782 Exterior Clubhouse Stairs ‐ Side D ‐ Floor <5.00 ug/ft2 Below Tree adjacent to Columbus Square ‐ Side A 27.3 ppm Below12/27/2023 Columbus Square 15214 Columbus Square, Tustin CA 92782 Exterior Clubhouse Entry ‐ Side D ‐ Floor <5.00 ug/ft2 Below Tree adjacent to Montgomery St ‐ Side D 13.0 ppm Below12/27/2023 Columbus Square 15214 Columbus Square, Tustin CA 92782 Exterior Patio ‐ Side C ‐ Table <5.00 ug/ft2 Below Tree adjacent to Fountain ‐ Side C 11.8 ppm Below12/27/2023 Columbus Square 15214 Columbus Square, Tustin CA 92782 Exterior Playground ‐ Side C ‐ Landing <5.00 ug/ft2 Below Tree adjacent to Davenport St ‐ Side C 14.7 ppm Below12/27/2023 Columbus Square 15214 Columbus Square, Tustin CA 92782 Exterior Playground ‐ Side B ‐ Tabletop <5.00 ug/ft2 Below Tree adjacent to Playground ‐ Side B 14.4 ppm Below12/27/2023 Columbus Square 15214 Columbus Square, Tustin CA 92782 Exterior Clubhouse Fountain ‐ Side B ‐ Ledge <5.00 ug/ft2 Below Tree adjacent to Charleston St ‐ Side B 16.4 ppm Below12/27/2023 Columbus Square 15214 Columbus Square, Tustin CA 92782 Exterior Clubhouse Entry ‐ Side A ‐ Floor <5.00 ug/ft2 Below12/27/2023 Columbus Square 15214 Columbus Square, Tustin CA 92782 Exterior Pool Pump ‐ Side B ‐ Ledge 18.0 ug/ft2 Below12/27/2023 Columbus Square 15214 Columbus Square, Tustin CA 92782 Exterior Pool ‐ Side A ‐ Tabletop <5.00 ug/ft2 Below12/27/2023 Columbus Square 15214 Columbus Square, Tustin CA 92782 Exterior Pool ‐ Side C ‐ Tabletop <5.00 ug/ft2 Below12/27/2023 Columbus Square 15214 Columbus Square, Tustin CA 92782 Exterior Pool ‐ Side B ‐ Tabletop 14.0 ug/ft2 Below12/27/2023 Montgomery Park 1496 Montgomery Street, Tustin CA 92782 Exterior Sign ‐ Side A ‐ Ledge <5.00 ug/ft2 Below Tree adjacent to Basketball Court ‐ Side A 13.4 ppm Below12/27/2023 Montgomery Park 1496 Montgomery Street, Tustin CA 92782 Exterior Basketball Court ‐ Side A ‐ Floor 5.44 ug/ft2 Below Tree adjacent to Picnic Area ‐ Side C 18.4 ppm Below12/27/2023 Montgomery Park 1496 Montgomery Street, Tustin CA 92782 Exterior Picnic Area ‐ Side C ‐ Tabletop 6.89 ug/ft2 Below Tree adjacent to Playground ‐ Side C 16.0 ppm Below12/27/2023 Montgomery Park 1496 Montgomery Street, Tustin CA 92782 Exterior Playground ‐ Side C ‐ Landing 5.29 ug/ft2 Below Tree adjacent to Hangar ‐ Side C 16.2 ppm Below12/27/2023 Montgomery Park 1496 Montgomery Street, Tustin CA 92782 Exterior Sign adjacent to Hangar ‐ Side C ‐ Ledge 5.42 ug/ft2 Below12/27/2023 Arlington Park 1448 Montgomery Street, Tustin CA 92782 Exterior Sign ‐ Side A ‐ Ledge <5.00 ug/ft2 Below Tree adjacent to Picnic Area ‐ Side D 17.0 ppm Below12/27/2023 Arlington Park 1448 Montgomery Street, Tustin CA 92782 Exterior Basketball Court ‐ Side D ‐ Floor 5.29 ug/ft2 Below Tree adjacent to Playground ‐ Side A 13.1 ppm Below12/27/2023 Arlington Park 1448 Montgomery Street, Tustin CA 92782 Exterior Playground ‐ Side A ‐ Landing <5.00 ug/ft2 Below Tree adjacent in middle grass area ‐ Side D 14.8 ppm Below12/27/2023 Arlington Park 1448 Montgomery Street, Tustin CA 92782 Exterior Picnic Area ‐ Side C ‐ Tabletop <5.00 ug/ft2 Below Tree adjacent to Hangar ‐ Side C <10.4 ppm Below12/27/2023 Arlington Park 1448 Montgomery Street, Tustin CA 92782 Exterior Sign adjacent to Hangar ‐ Side C ‐ Ledge <5.00 ug/ft2 BelowOrange County Health Care Agency Lead Soil and Dust Testing SAMPLING MAP AND PROPERTY SKETCHǻȱȱǼ Lead Poisoning Follow-up Form Page 12 $GGUHVVRIVLWH 'DWHRIHQYLURQPHQWDOLQYHVWLJDWLRQ 'DWHRIFOHDUDQFHLQVSHFWLRQLIDSSOLFDEOH State ID# California Department of 3XEOLF+HDOWK Childhood Lead Poisoning Prevention Branch RI -PDBM*% 3: 6 ' R &,/HJHQG &6 &' (,/HJHQG -XO\ 1448 MONTGOMERY ST TUSTIN ,CA 92782 12/27/2023 ■ Dust sample number Soil sample number 1 1 9051134 17.0 x 9051135 9051136 9051137 13.1 14.8 <10.4 x x x Page 1 of 2 Client Project : 986167 12/28/2023 12/28/2023 Date Reported : Date Analyzed : Date Received : AAT Project : Phone : Email : Fax : Attn : Client : Project Location : 1448 MONTGOMERY ST TUSTIN ORANGE 92782 1448 MONTGOMERY ST TUSTIN ORANGE 92782 30105 Beverly Road Romulus, MI 48174 Ph: 734-629-8161; Fax: 734-629-8431 Sampling Date :12/27/2023 12/28/2023 Certificate of Analysis: Lead In Soil by EPA SW-846 7000B and 3050B Method* Lab Sample ID Results Lead μg/g (PPM)Sample DescriptionClient Code Calculated RL μg/g * S1 PLAY AREA PARK SIDE D9051134 17.0 9.86 S2 PLAY AREA PARK SIDE A9051135 13.1 10.7 S3 PLAY AREA PARK SIDE D9051136 14.8 10.6 S4 PLAY AREA PARK SIDE C9051137 <10.4 10.4 Analyst Signature Richard Laugal 986167 AAT Project:Date Printed: 12/28/2023 1:02PM *RL= Reporting Limit * For true values assume (3) significant figures. The method and batch QC are acceptable unless otherwise stated. Current EPA/HUD Interim Standard for soil samples are: 400 PPM (parts per million) for play area's, 1200 PPM for building Perimters and 1000 PPM for California Building Perimeters. AAT internal sop S204. The laboratory operates in accord with ISO 17025 guidelines and holds limited scopes of accreditation under AIHA-LAP and NY State DOH ELAP programs. These results are submitted pursuant to AAT LLC current terms and conditions of sale, including the company's standard warranty and limitation of liability provisions. Analytical results relate to the samples as received by the lab. AAT will not assume any liability or responsibility for the manner in which the results are used or interpreted. Reproduction of this document other than in its entirety is not permitted. AAT does not blank correct reported values. Sample data apply only to items analyzed. Samples are stored for 15 days following report date. *= Validated modified method AIHA LAP- Lab ID #100986, NY State DOH ELAP -Lab ID #11864, State of Ohio- Lab ID # 10042 Page 2 of 2 To : Attn : Phone : AAT Project : Client Project : Date Reported : Project Location : Email : 986167 1448 MONTGOMERY ST TUSTIN ORANGE 92782 1448 MONTGOMERY ST TUSTIN ORANGE 92782 30105 Beverly Road Romulus, MI 48174 Ph: 734-629-8161; Fax: 734-629-8431 12/28/2023 Sample CompletedAnalysis RequestedClient Code Analyst 9051134 12/28/2023Lead SoilS1 Richard Laugal 9051135 12/28/2023Lead SoilS2 Richard Laugal 9051136 12/28/2023Lead SoilS3 Richard Laugal 9051137 12/28/2023Lead SoilS4 Richard Laugal Quality Assurance Coordinator Reviewed By Elyse Bidle 986167 AAT Project:Date Printed: 12/28/2023 1:02PM This report is intended for use solely by the individual or entity to which it is addressed. It may contain information that is privileged, confidential and otherwise exempt by law from disclosure. If the reader of this information is not the intended recipient or an employee of its intended recipient, you are herewith notified that any dissemination, distribution or copying of this information is strictly prohibited. If you have received this information in error, please notify AAT immediately. Thank you. NY State DOH ELAP -Lab ID #11864, Michigan State Lab # 9996 9051128 9051129 9051130 9051131 9051132 9051133 <5.00 <5.00 5.29 <5.00 <5.00 <5.00 <5.00 5.29 <5.00 <5.00 <5.00 x x x x x x Page 1 of 2 Client Project : 986166 12/28/2023 12/28/2023 Date Reported : Date Analyzed : Date Received : AAT Project : Phone : Email : Fax : Attn : Client : Project Location : 1448 MONTGOMERY ST TUSTIN ORANGE 92782 1448 MONTGOMERY ST TUSTIN ORANGE 92782 30105 Beverly Road Romulus, MI 48174 Ph: 734-629-8161; Fax: 734-629-8431 Sampling Date :12/27/2023 12/28/2023 Certificate of Analysis: Lead In Dust Wipe by EPA Method 7000B/NIOSH 7082* Lab Sample ID Area (Sq ft) Width (inch) Length (inch)Sample DescriptionClient Code Results Lead μg/ft2 * Total μg BLANK N/AN/A N/A N/D9051128<5.00 D1 EXT SIGN SIDE A LEDGE 1.0012 12 <5.009051129<5.00 D2 EXT BSKTBL CRT SIDE D FL 1.0012 12 5.2990511305.29 D3 EXT PLYGRND SIDE A LNDG 1.0012 12 <5.009051131<5.00 D4 EXT PCNC AREA SIDE C TBLTP 1.0012 12 <5.009051132<5.00 D5 EXT SIGN ADJ TO HNGR SD C LDG 1.0012 12 <5.009051133<5.00 Analyst Signature Richard Laugal 986166 AAT Project:Date Printed:12/28/2023 AIHA LAP- Lab ID #100986, NY State DOH ELAP -Lab ID #11864, State of Ohio- Lab ID # 10042 ND = Not Detected, N/A = Not Available, RL = Reporting Limit, Analytical Reporting Limit is 5 ug/sample. For true values assume (3) significant figures. AAT internal SOP S205. The method and batch QC are acceptable unless otherwise stated. EPA Regulatory Limits: 10 ug/ft2 (Floors, Carpeted/Uncarpeted), 100 ug/ft2 (Window Sill/Stools), 400 ug/ft2 (Window Trough/Well/Ext Concrete Surfaces). HUD Grantee Regulatory Limits: 10 ug/ft2 (Interior Floors), 40 ug/ft2 (Porch Floors), 100 ug/ft2 (Window Sills), 100 ug/ft2 (Window Troughs). The laboratory operates in accord with ISO 17025 guidelines and holds limited scopes of accreditation under AIHA-LAP and NY State DOH ELAP programs. These results are submitted pursuant to AAT, LLC current terms and conditions of sale, including the company's standard warranty and limitation of liability provisions. Analytical results relate to the samples as received by the lab. AAT will not assume any liability or responsibility for the manner in which the results are used or interpreted. All Quality Control requirements for the samples this report contains have been met. AAT does not blank correct reported values. Sample data apply only to items analyzed. Results are calculated with wipe dimensions supplied by client. Reproduction of this document other than in its entirety is not authorized by AAT, LLC. * = Validated modified method. Samples are stored for 15 days following report date Page 2 of 2 To : Attn : Phone : AAT Project : Client Project : Date Reported : Project Location : Email : 986166 1448 MONTGOMERY ST TUSTIN ORANGE 92782 1448 MONTGOMERY ST TUSTIN ORANGE 92782 30105 Beverly Road Romulus, MI 48174 Ph: 734-629-8161; Fax: 734-629-8431 12/28/2023 Sample CompletedAnalysis RequestedClient Code Analyst 9051128 12/28/2023Dust WipeBLANK Richard Laugal 9051129 12/28/2023Dust WipeD1 Richard Laugal 9051130 12/28/2023Dust WipeD2 Richard Laugal 9051131 12/28/2023Dust WipeD3 Richard Laugal 9051132 12/28/2023Dust WipeD4 Richard Laugal 9051133 12/28/2023Dust WipeD5 Richard Laugal Quality Assurance Coordinator Reviewed By Elyse Bidle 986166 AAT Project:Date Printed: 12/28/2023 10:37AM This report is intended for use solely by the individual or entity to which it is addressed. It may contain information that is privileged, confidential and otherwise exempt by law from disclosure. If the reader of this information is not the intended recipient or an employee of its intended recipient, you are herewith notified that any dissemination, distribution or copying of this information is strictly prohibited. If you have received this information in error, please notify AAT immediately. Thank you. AIHA LAP- Lab ID #100986, NY State DOH ELAP -Lab ID #11864, State of Ohio- Lab ID # 10042 Arlington Park Dust Samples /($'+$=$5'(9$/8$7,215(3257 California Department of Public HealthState of California—Health and Human Services Agency 6HFWLRQ²6WUXFWXUH:KHUH/HDG+D]DUG(YDOXDWLRQ:DV&RQGXFWHG Lead Inspection Risk assessment Clearance Inspection Other (specify) _____________________________ City County Zip Code Construction date (year) of structure Type of structure Multi-unit building School or daycare Single family dwelling 6HFWLRQ²2ZQHURI6WUXFWXUHLIEXVLQHVVDJHQF\OLVWFRQWDFWSHUVRQ Address [number, street, apartment (if applicable)]City State Name Telephone number 6HFWLRQ²5HVXOWVRI/HDG+D]DUG(YDOXDWLRQFKHFNDOOWKDWDSSO\ No lead-based paint detected No lead hazards detected Intact lead-based paint detected Lead-contaminated dust found 6HFWLRQ²,QGLYLGXDO&RQGXFWLQJ/HDG+D]DUG(YDOXDWLRQ Name Name and CDPH certification number of any other individuals conducting sampling or testing (if applicable) CDPH certification number Signature Date 6HFWLRQ²$WWDFKPHQWV A. A foundation diagram or sketch of the structure indicating the specifc locations of each lead hazard or presence of lead-based paint; B. Each testing method, device, and sampling procedure used; C. All data collected, including quality control data, laboratory results, including laboratory name, address, and phone number. First copy and attachments retained by inspector Second copy and attachments retained by owner Third copy only (no attachments) mailedfaxedRUHPDLOHG to: California Department of Public Health Childhood Lead Poisoning Prevention Branch Reports 850 Marina Bay Parkway, Building P, Third Floor Richmond, CA 94804-6403 Fax: (510) 620-5656 (PDLOFGSKBFH#FGSKFDJRY CDPH 8552 (6/) Zip Code Address [number, street, apartment (if applicable)] City State Zip Code Telephone number 6HFWLRQ²7\SHRI/HDG+D]DUG(YDOXDWLRQ&KHFNRQHER[RQO\ Address [number, street, apartment (if applicable)] Other____________ No Deteriorated lead-based paint detected Lead-contaminated soil found Other____________________ Yes Don’t Know Children living in structure? 6HFWLRQ²'DWHRI/HDG+D]DUG(YDOXDWLRQ g or testing (if applicab 12/27/2023 ■Proactive Inspection w/ Limited Sampling 1448 MONTGOMERY ST TUSTIN ORANGE 92782 Unknown ■Park ■ City of Tustin 714-573-3012 300 Centenial Way Tustin CA 92780 ■ CASSANDRA GOMEZ 714-433-6418 1241 E DYER RD, SUITE 120 SANTA ANA 92705 LRC-00010138 12/28/2023 Jonathan Wolent LRC-00004167 SAMPLING MAP AND PROPERTY SKETCHǻȱȱǼ Lead Poisoning Follow-up Form Page 12 $GGUHVVRIVLWH 'DWHRIHQYLURQPHQWDOLQYHVWLJDWLRQ 'DWHRIFOHDUDQFHLQVSHFWLRQLIDSSOLFDEOH State ID# California Department of 3XEOLF+HDOWK Childhood Lead Poisoning Prevention Branch RI -PDBM*% 3: 6 ' R &,/HJHQG &6 &' (,/HJHQG -XO\ 15214 COLUMBUS SQUARE TUSTIN ,CA 92782 12/27/2023 ■ Dust sample number Soil sample number 1 1 6 7 9051111 9051112 9051113 9051114 14.2 27.3 13.0 11.8 x x x x 9051115 9051116 9051117 14.7 14.4 16.4 x x x x Page 1 of 2 Client Project : 986163 12/28/2023 12/28/2023 Date Reported : Date Analyzed : Date Received : AAT Project : Phone : Email : Fax : Attn : Client : Project Location : 15214 COLUMBUS SQUARE TUSTIN ORANGE 92782 15214 COLUMBUS SQUARE TUSTIN ORANGE 92782 30105 Beverly Road Romulus, MI 48174 Ph: 734-629-8161; Fax: 734-629-8431 Sampling Date :12/27/2023 12/28/2023 Certificate of Analysis: Lead In Soil by EPA SW-846 7000B and 3050B Method* Lab Sample ID Results Lead μg/g (PPM)Sample DescriptionClient Code Calculated RL μg/g * S1 PLAY AREA PARK SIDE A9051111 14.2 10.3 S2 PLAY AREA PARK SIDE A9051112 27.3 9.96 S3 PLAY AREA PARK SIDE D9051113 13.0 10.6 S4 PLAY AREA PARK SIDE C9051114 11.8 10.8 S5 PLAY AREA PARK SIDE C9051115 14.7 10.2 S6 PLAY AREA PLAYGROUND SIDE B9051116 14.4 10.6 S7 PLAY AREA PLAYGROUND SIDE B9051117 16.4 10.5 Analyst Signature Richard Laugal 986163 AAT Project:Date Printed:12/28/2023 12:57PM *RL= Reporting Limit * For true values assume (3) significant figures. The method and batch QC are acceptable unless otherwise stated. Current EPA/HUD Interim Standard for soil samples are: 400 PPM (parts per million) for play area's, 1200 PPM for building Perimters and 1000 PPM for California Building Perimeters. AAT internal sop S204. The laboratory operates in accord with ISO 17025 guidelines and holds limited scopes of accreditation under AIHA-LAP and NY State DOH ELAP programs. These results are submitted pursuant to AAT LLC current terms and conditions of sale, including the company's standard warranty and limitation of liability provisions. Analytical results relate to the samples as received by the lab. AAT will not assume any liability or responsibility for the manner in which the results are used or interpreted. Reproduction of this document other than in its entirety is not permitted. AAT does not blank correct reported values. Sample data apply only to items analyzed. Samples are stored for 15 days following report date. *= Validated modified method AIHA LAP- Lab ID #100986, NY State DOH ELAP -Lab ID #11864, State of Ohio- Lab ID # 10042 Page 2 of 2 To : Attn : Phone : AAT Project : Client Project : Date Reported : Project Location : Email : 986163 15214 COLUMBUS SQUARE TUSTIN ORANGE 92782 15214 COLUMBUS SQUARE TUSTIN ORANGE 92782 30105 Beverly Road Romulus, MI 48174 Ph: 734-629-8161; Fax: 734-629-8431 12/28/2023 Sample CompletedAnalysis RequestedClient Code Analyst 9051111 12/28/2023Lead SoilS1 Richard Laugal 9051112 12/28/2023Lead SoilS2 Richard Laugal 9051113 12/28/2023Lead SoilS3 Richard Laugal 9051114 12/28/2023Lead SoilS4 Richard Laugal 9051115 12/28/2023Lead SoilS5 Richard Laugal 9051116 12/28/2023Lead SoilS6 Richard Laugal 9051117 12/28/2023Lead SoilS7 Richard Laugal Quality Assurance Coordinator Reviewed By Elyse Bidle 986163 AAT Project:Date Printed: 12/28/2023 12:57PM This report is intended for use solely by the individual or entity to which it is addressed. It may contain information that is privileged, confidential and otherwise exempt by law from disclosure. If the reader of this information is not the intended recipient or an employee of its intended recipient, you are herewith notified that any dissemination, distribution or copying of this information is strictly prohibited. If you have received this information in error, please notify AAT immediately. Thank you. NY State DOH ELAP -Lab ID #11864, Michigan State Lab # 9996 9051098 9051099 9051100 9051101 9051102 9051103 9051104 <5.00 <5.00 <5.00 <5.00 <5.00 <5.00 <5.00 <5.00 <5.00 <5.00 x x x x <5.00 <5.00 x <5.00 x 9051105 9051106 9051107 9051108 9051109 9051110 18.0 14.0 <5.00 <5.00 <5.00 <5.00 <5.00 <5.00 18.0 <5.00 <5.00 14.0 x x x x x x Page 1 of 2 Client Project : 986162 12/28/2023 12/28/2023 Date Reported : Date Analyzed : Date Received : AAT Project : Phone : Email : Fax : Attn : Client : Project Location : 15214 COLUMBUS SQUARE TUSTIN ORANGE 92782 15214 COLUMBUS SQUARE TUSTIN ORANGE 92782 30105 Beverly Road Romulus, MI 48174 Ph: 734-629-8161; Fax: 734-629-8431 Sampling Date :12/27/2023 12/28/2023 Certificate of Analysis: Lead In Dust Wipe by EPA Method 7000B/NIOSH 7082* Lab Sample ID Area (Sq ft) Width (inch) Length (inch)Sample DescriptionClient Code Results Lead μg/ft2 * Total μg BLANK N/AN/A N/A N/D9051098<5.00 D1 EXT FOUNTAIN SIDE D LEDGE 1.0012 12 <5.009051099<5.00 D2 EXT CLBHSE STRS SIDE D FL 1.0012 12 <5.009051100<5.00 D3 EXT CLBHSE ENT SIDE D FL 1.0012 12 <5.009051101<5.00 D4 EXT PATIO SIDE C TABLE 1.0012 12 <5.009051102<5.00 D5 EXT PLYGRND SIDE C LNDG 1.0012 12 <5.009051103<5.00 D6 EXT PLYGRND SIDE B TBLTP 1.0012 12 <5.009051104<5.00 D7 EXT CLBHSE FNTN SIDE B LEDGE 1.0012 12 <5.009051105<5.00 D8 EXT CLBHSE ENT SIDE A FL 1.0012 12 <5.009051106<5.00 D9 EXT POOL PUMP SIDE B LEDGE 1.0012 12 18.0905110718.0 D10 EXT POOL SIDE A TBLTOP 1.0012 12 <5.009051108<5.00 D11 EXT POOL SIDE C TBLTOP 1.0012 12 <5.009051109<5.00 D12 EXT POOL SIDE B TBLTOP 1.0012 12 14.0905111014.0 Analyst Signature Richard Laugal 986162 AAT Project:Date Printed:12/28/2023 AIHA LAP- Lab ID #100986, NY State DOH ELAP -Lab ID #11864, State of Ohio- Lab ID # 10042 ND = Not Detected, N/A = Not Available, RL = Reporting Limit, Analytical Reporting Limit is 5 ug/sample. For true values assume (3) significant figures. AAT internal SOP S205. The method and batch QC are acceptable unless otherwise stated. EPA Regulatory Limits: 10 ug/ft2 (Floors, Carpeted/Uncarpeted), 100 ug/ft2 (Window Sill/Stools), 400 ug/ft2 (Window Trough/Well/Ext Concrete Surfaces). HUD Grantee Regulatory Limits: 10 ug/ft2 (Interior Floors), 40 ug/ft2 (Porch Floors), 100 ug/ft2 (Window Sills), 100 ug/ft2 (Window Troughs). The laboratory operates in accord with ISO 17025 guidelines and holds limited scopes of accreditation under AIHA-LAP and NY State DOH ELAP programs. These results are submitted pursuant to AAT, LLC current terms and conditions of sale, including the company's standard warranty and limitation of liability provisions. Analytical results relate to the samples as received by the lab. AAT will not assume any liability or responsibility for the manner in which the results are used or interpreted. All Quality Control requirements for the samples this report contains have been met. AAT does not blank correct reported values. Sample data apply only to items analyzed. Results are calculated with wipe dimensions supplied by client. Reproduction of this document other than in its entirety is not authorized by AAT, LLC. * = Validated modified method. Samples are stored for 15 days following report date Page 2 of 2 To : Attn : Phone : AAT Project : Client Project : Date Reported : Project Location : Email : 986162 15214 COLUMBUS SQUARE TUSTIN ORANGE 92782 15214 COLUMBUS SQUARE TUSTIN ORANGE 92782 30105 Beverly Road Romulus, MI 48174 Ph: 734-629-8161; Fax: 734-629-8431 12/28/2023 Sample CompletedAnalysis RequestedClient Code Analyst 9051098 12/28/2023Dust WipeBLANK Richard Laugal 9051099 12/28/2023Dust WipeD1 Richard Laugal 9051100 12/28/2023Dust WipeD2 Richard Laugal 9051101 12/28/2023Dust WipeD3 Richard Laugal 9051102 12/28/2023Dust WipeD4 Richard Laugal 9051103 12/28/2023Dust WipeD5 Richard Laugal 9051104 12/28/2023Dust WipeD6 Richard Laugal 9051105 12/28/2023Dust WipeD7 Richard Laugal 9051106 12/28/2023Dust WipeD8 Richard Laugal 9051107 12/28/2023Dust WipeD9 Richard Laugal 9051108 12/28/2023Dust WipeD10 Richard Laugal 9051109 12/28/2023Dust WipeD11 Richard Laugal 9051110 12/28/2023Dust WipeD12 Richard Laugal Quality Assurance Coordinator Reviewed By Elyse Bidle 986162 AAT Project:Date Printed: 12/28/2023 10:44AM This report is intended for use solely by the individual or entity to which it is addressed. It may contain information that is privileged, confidential and otherwise exempt by law from disclosure. If the reader of this information is not the intended recipient or an employee of its intended recipient, you are herewith notified that any dissemination, distribution or copying of this information is strictly prohibited. If you have received this information in error, please notify AAT immediately. Thank you. AIHA LAP- Lab ID #100986, NY State DOH ELAP -Lab ID #11864, State of Ohio- Lab ID # 10042 Columbus Square Dust Samples /($'+$=$5'(9$/8$7,215(3257 California Department of Public HealthState of California—Health and Human Services Agency 6HFWLRQ²6WUXFWXUH:KHUH/HDG+D]DUG(YDOXDWLRQ:DV&RQGXFWHG Lead Inspection Risk assessment Clearance Inspection Other (specify) _____________________________ City County Zip Code Construction date (year) of structure Type of structure Multi-unit building School or daycare Single family dwelling 6HFWLRQ²2ZQHURI6WUXFWXUHLIEXVLQHVVDJHQF\OLVWFRQWDFWSHUVRQ Address [number, street, apartment (if applicable)]City State Name Telephone number 6HFWLRQ²5HVXOWVRI/HDG+D]DUG(YDOXDWLRQFKHFNDOOWKDWDSSO\ No lead-based paint detected No lead hazards detected Intact lead-based paint detected Lead-contaminated dust found 6HFWLRQ²,QGLYLGXDO&RQGXFWLQJ/HDG+D]DUG(YDOXDWLRQ Name Name and CDPH certification number of any other individuals conducting sampling or testing (if applicable) CDPH certification number Signature Date 6HFWLRQ²$WWDFKPHQWV A. A foundation diagram or sketch of the structure indicating the specifc locations of each lead hazard or presence of lead-based paint; B. Each testing method, device, and sampling procedure used; C. All data collected, including quality control data, laboratory results, including laboratory name, address, and phone number. First copy and attachments retained by inspector Second copy and attachments retained by owner Third copy only (no attachments) mailedfaxedRUHPDLOHG to: California Department of Public Health Childhood Lead Poisoning Prevention Branch Reports 850 Marina Bay Parkway, Building P, Third Floor Richmond, CA 94804-6403 Fax: (510) 620-5656 (PDLOFGSKBFH#FGSKFDJRY CDPH 8552 (6/) Zip Code Address [number, street, apartment (if applicable)] City State Zip Code Telephone number 6HFWLRQ²7\SHRI/HDG+D]DUG(YDOXDWLRQ&KHFNRQHER[RQO\ Address [number, street, apartment (if applicable)] Other____________ No Deteriorated lead-based paint detected Lead-contaminated soil found Other____________________ Yes Don’t Know Children living in structure? 6HFWLRQ²'DWHRI/HDG+D]DUG(YDOXDWLRQ mpling or testing (if applicable 12/27/2023 ■Proactive Inspection w/ Limited Sampling 15214 COLUMBUS SQUARE TUSTIN ORANGE 92782 Unknown ■Park ■ City of Tustin 714-573-3012 300 Centential Way Tustin CA 92780 ■ CASSANDRA GOMEZ 714-433-6418 1241 E DYER RD, SUITE 120 SANTA ANA CA 92705 LRC-00010138 12/28/2023 Jonathan Wolent LRC-00004167 SAMPLING MAP AND PROPERTY SKETCHǻȱȱǼ Lead Poisoning Follow-up Form Page 12 $GGUHVVRIVLWH 'DWHRIHQYLURQPHQWDOLQYHVWLJDWLRQ 'DWHRIFOHDUDQFHLQVSHFWLRQLIDSSOLFDEOH State ID# California Department of 3XEOLF+HDOWK Childhood Lead Poisoning Prevention Branch RI -PDBM*% 3: 6 ' R &,/HJHQG &6 &' (,/HJHQG -XO\ 1496 Montgomery St Tustin ,CA 92782 12/27/2023 ■ Dust sample number Soil sample number 1 1 9051118 9051119 9051120 9051121 13.4 18.4 16.0 16.2 x x x x Page 1 of 2 Client Project : 986164 12/28/2023 12/28/2023 Date Reported : Date Analyzed : Date Received : AAT Project : Phone : Email : Fax : Attn : Client : Project Location : 1496 MONTGOMERY ST TUSTIN ORANGE 92782 1496 MONTGOMERY ST TUSTIN ORANGE 92782 30105 Beverly Road Romulus, MI 48174 Ph: 734-629-8161; Fax: 734-629-8431 Sampling Date :12/27/2023 12/28/2023 Certificate of Analysis: Lead In Soil by EPA SW-846 7000B and 3050B Method* Lab Sample ID Results Lead μg/g (PPM)Sample DescriptionClient Code Calculated RL μg/g * S1 PLAY AREA PARK SIDE A9051118 13.4 10.2 S2 PLAY AREA PARK SIDE C9051119 18.4 10.3 S3 PLAY AREA PARK SIDE C9051120 16.0 10.5 S4 PLAY AREA PARK SIDE C9051121 16.2 10.3 Analyst Signature Richard Laugal 986164 AAT Project:Date Printed: 12/28/2023 1:02PM *RL= Reporting Limit * For true values assume (3) significant figures. The method and batch QC are acceptable unless otherwise stated. Current EPA/HUD Interim Standard for soil samples are: 400 PPM (parts per million) for play area's, 1200 PPM for building Perimters and 1000 PPM for California Building Perimeters. AAT internal sop S204. The laboratory operates in accord with ISO 17025 guidelines and holds limited scopes of accreditation under AIHA-LAP and NY State DOH ELAP programs. These results are submitted pursuant to AAT LLC current terms and conditions of sale, including the company's standard warranty and limitation of liability provisions. Analytical results relate to the samples as received by the lab. AAT will not assume any liability or responsibility for the manner in which the results are used or interpreted. Reproduction of this document other than in its entirety is not permitted. AAT does not blank correct reported values. Sample data apply only to items analyzed. Samples are stored for 15 days following report date. *= Validated modified method AIHA LAP- Lab ID #100986, NY State DOH ELAP -Lab ID #11864, State of Ohio- Lab ID # 10042 Page 2 of 2 To : Attn : Phone : AAT Project : Client Project : Date Reported : Project Location : Email : 986164 1496 MONTGOMERY ST TUSTIN ORANGE 92782 1496 MONTGOMERY ST TUSTIN ORANGE 92782 30105 Beverly Road Romulus, MI 48174 Ph: 734-629-8161; Fax: 734-629-8431 12/28/2023 Sample CompletedAnalysis RequestedClient Code Analyst 9051118 12/28/2023Lead SoilS1 Richard Laugal 9051119 12/28/2023Lead SoilS2 Richard Laugal 9051120 12/28/2023Lead SoilS3 Richard Laugal 9051121 12/28/2023Lead SoilS4 Richard Laugal Quality Assurance Coordinator Reviewed By Elyse Bidle 986164 AAT Project:Date Printed:12/28/2023 1:02PM This report is intended for use solely by the individual or entity to which it is addressed. It may contain information that is privileged, confidential and otherwise exempt by law from disclosure. If the reader of this information is not the intended recipient or an employee of its intended recipient, you are herewith notified that any dissemination, distribution or copying of this information is strictly prohibited. If you have received this information in error, please notify AAT immediately. Thank you. NY State DOH ELAP -Lab ID #11864, Michigan State Lab # 9996 9051122 9051123 9051124 9051125 9051126 9051127 <5.00 <5.00 5.44 6.89 5.29 5.42 <5.00 5.44 6.89 5.29 5.42 x x x x x Page 1 of 2 Client Project : 986165 12/28/2023 12/28/2023 Date Reported : Date Analyzed : Date Received : AAT Project : Phone : Email : Fax : Attn : Client : Project Location : 1496 MONTGOMERY ST TUSTIN ORANGE 92782 1496 MONTGOMERY ST TUSTIN ORANGE 92782 30105 Beverly Road Romulus, MI 48174 Ph: 734-629-8161; Fax: 734-629-8431 Sampling Date :12/27/2023 12/28/2023 Certificate of Analysis: Lead In Dust Wipe by EPA Method 7000B/NIOSH 7082* Lab Sample ID Area (Sq ft) Width (inch) Length (inch)Sample DescriptionClient Code Results Lead μg/ft2 * Total μg BLANK N/AN/A N/A N/D9051122<5.00 D1 EXT SIGN SIDE A LEDGE 1.0012 12 <5.009051123<5.00 D2 EXT BSKTBL CRT SIDE A FL 1.0012 12 5.4490511245.44 D3 EXT PCNC AREA SIDE C TBLTP 1.0012 12 6.8990511256.89 D4 EXT PLYGRND SIDE C LNDG 1.0012 12 5.2990511265.29 D5 EXT SIGN ADJ TO HNGR SD C LDG 1.0012 12 5.4290511275.42 Analyst Signature Richard Laugal 986165 AAT Project:Date Printed:12/28/2023 AIHA LAP- Lab ID #100986, NY State DOH ELAP -Lab ID #11864, State of Ohio- Lab ID # 10042 ND = Not Detected, N/A = Not Available, RL = Reporting Limit, Analytical Reporting Limit is 5 ug/sample. For true values assume (3) significant figures. AAT internal SOP S205. The method and batch QC are acceptable unless otherwise stated. EPA Regulatory Limits: 10 ug/ft2 (Floors, Carpeted/Uncarpeted), 100 ug/ft2 (Window Sill/Stools), 400 ug/ft2 (Window Trough/Well/Ext Concrete Surfaces). HUD Grantee Regulatory Limits: 10 ug/ft2 (Interior Floors), 40 ug/ft2 (Porch Floors), 100 ug/ft2 (Window Sills), 100 ug/ft2 (Window Troughs). The laboratory operates in accord with ISO 17025 guidelines and holds limited scopes of accreditation under AIHA-LAP and NY State DOH ELAP programs. These results are submitted pursuant to AAT, LLC current terms and conditions of sale, including the company's standard warranty and limitation of liability provisions. Analytical results relate to the samples as received by the lab. AAT will not assume any liability or responsibility for the manner in which the results are used or interpreted. All Quality Control requirements for the samples this report contains have been met. AAT does not blank correct reported values. Sample data apply only to items analyzed. Results are calculated with wipe dimensions supplied by client. Reproduction of this document other than in its entirety is not authorized by AAT, LLC. * = Validated modified method. Samples are stored for 15 days following report date Page 2 of 2 To : Attn : Phone : AAT Project : Client Project : Date Reported : Project Location : Email : 986165 1496 MONTGOMERY ST TUSTIN ORANGE 92782 1496 MONTGOMERY ST TUSTIN ORANGE 92782 30105 Beverly Road Romulus, MI 48174 Ph: 734-629-8161; Fax: 734-629-8431 12/28/2023 Sample CompletedAnalysis RequestedClient Code Analyst 9051122 12/28/2023Dust WipeBLANK Richard Laugal 9051123 12/28/2023Dust WipeD1 Richard Laugal 9051124 12/28/2023Dust WipeD2 Richard Laugal 9051125 12/28/2023Dust WipeD3 Richard Laugal 9051126 12/28/2023Dust WipeD4 Richard Laugal 9051127 12/28/2023Dust WipeD5 Richard Laugal Quality Assurance Coordinator Reviewed By Elyse Bidle 986165 AAT Project:Date Printed: 12/28/2023 10:37AM This report is intended for use solely by the individual or entity to which it is addressed. It may contain information that is privileged, confidential and otherwise exempt by law from disclosure. If the reader of this information is not the intended recipient or an employee of its intended recipient, you are herewith notified that any dissemination, distribution or copying of this information is strictly prohibited. If you have received this information in error, please notify AAT immediately. Thank you. AIHA LAP- Lab ID #100986, NY State DOH ELAP -Lab ID #11864, State of Ohio- Lab ID # 10042 Montgomery Park Dust Samples /($'+$=$5'(9$/8$7,215(3257 California Department of Public HealthState of California—Health and Human Services Agency 6HFWLRQ²6WUXFWXUH:KHUH/HDG+D]DUG(YDOXDWLRQ:DV&RQGXFWHG Lead Inspection Risk assessment Clearance Inspection Other (specify) _____________________________ City County Zip Code Construction date (year) of structure Type of structure Multi-unit building School or daycare Single family dwelling 6HFWLRQ²2ZQHURI6WUXFWXUHLIEXVLQHVVDJHQF\OLVWFRQWDFWSHUVRQ Address [number, street, apartment (if applicable)]City State Name Telephone number 6HFWLRQ²5HVXOWVRI/HDG+D]DUG(YDOXDWLRQFKHFNDOOWKDWDSSO\ No lead-based paint detected No lead hazards detected Intact lead-based paint detected Lead-contaminated dust found 6HFWLRQ²,QGLYLGXDO&RQGXFWLQJ/HDG+D]DUG(YDOXDWLRQ Name Name and CDPH certification number of any other individuals conducting sampling or testing (if applicable) CDPH certification number Signature Date 6HFWLRQ²$WWDFKPHQWV A. A foundation diagram or sketch of the structure indicating the specifc locations of each lead hazard or presence of lead-based paint; B. Each testing method, device, and sampling procedure used; C. All data collected, including quality control data, laboratory results, including laboratory name, address, and phone number. First copy and attachments retained by inspector Second copy and attachments retained by owner Third copy only (no attachments) mailedfaxedRUHPDLOHG to: California Department of Public Health Childhood Lead Poisoning Prevention Branch Reports 850 Marina Bay Parkway, Building P, Third Floor Richmond, CA 94804-6403 Fax: (510) 620-5656 (PDLOFGSKBFH#FGSKFDJRY CDPH 8552 (6/) Zip Code Address [number, street, apartment (if applicable)] City State Zip Code Telephone number 6HFWLRQ²7\SHRI/HDG+D]DUG(YDOXDWLRQ&KHFNRQHER[RQO\ Address [number, street, apartment (if applicable)] Other____________ No Deteriorated lead-based paint detected Lead-contaminated soil found Other____________________ Yes Don’t Know Children living in structure? 6HFWLRQ²'DWHRI/HDG+D]DUG(YDOXDWLRQ mpling or testing (if applicabl 12/27/2023 ■Proactive Inspection w/ Limited Sampling 1496 Montgomery St Tustin Orange 92782 Unknown ■Park ■ City of Tustin 714-573-3012 300 Centenial Way Tustin CA 92780 ■ Cassandra Gomez 714-433-6418 1241 E Dyer Rd, Ste 120 Santa Ana CA 92705 LRC-00010138 12/27/2023 Jonathan Wolent LRC-00004167 Attachment B U.S. EPA Soil Testing Laboratory Reports TUSTIN BLIMP HANGAR FIRE ER DATA VALIDATION REPORT Date: January 18, 2024 Laboratory: LA Testing, Huntington Beach, CA Laboratory Job Number: 332322010 Data Validation Performed By: Kelly Luck, Weston Solutions, Inc. (WESTON) Superfund Technical Assessment and Response Team (START) Data Validation Reviewed By: Tara Johnon, WESTON START Weston Work Order #: 20905.012.003.0196.00 This data validation report has been prepared by WESTON START under the START V U.S. Environmental Protection Agency (EPA) Region 9 contract. This report documents the data validation for 15 soil samples collected for the Tustin Blimp Hangar Fire ER that were analyzed for the following parameters using the stated method: • California Administrative Manual (CAM) 17 Metals, excluding Mercury, by SW-846 Method 6010D A level II data package was received from LA Testing, Huntington Beach, CA. The data validation was conducted in general accordance with EPA “National Functional Guidelines for Inorganic Superfund Methods Data Review” dated November 2020. The Attachment contains the results summary sheets with any qualifiers applied during data validation. CAM 17 METALS, excluding MERCURY, by SW-846 METHOD 6010D The following table summarizes the samples for which this data validation is being conducted. Samples were analyzed for the following metals: antimony, arsenic, barium, beryllium, cadmium, chromium, cobalt, copper, lead, molybdenum, nickel, selenium, silver, thallium, vanadium, and zinc. Sample Lab ID Date Collected Matrix Date Prepared Date Analyzed TUS-20231227-CS01- SL01-00 332322010-0001 12/27/2023 Soil 12/28/2023 12/28/2023 TUS-20231227-CS02- SL01-00 332322010-0002 12/27/2023 Soil 12/28/2023 12/28/2023 TUS-20231227-CS03- SL01-00 332322010-0003 12/27/2023 Soil 12/28/2023 12/28/2023 TUS-20231227-CS04- SL01-00 332322010-0004 12/27/2023 Soil 12/28/2023 12/28/2023 TUS-20231227-CS05- SL01-00 332322010-0005 12/27/2023 Soil 12/28/2023 12/28/2023 TUS-20231227-CS06- SL01-00 332322010-0006 12/27/2023 Soil 12/28/2023 12/28/2023 Data Validation Report – January 18, 2024 Tustin Blimp Hangar Fire ER Laboratory: LA Testing, Huntington Beach, CA Laboratory Job Number: 332322010 2 Sample Lab ID Date Collected Matrix Date Prepared Date Analyzed TUS-20231227-CS07- SL01-00 332322010-0007 12/27/2023 Soil 12/28/2023 12/28/2023 TUS-20231227-MP01- SL01-00 332322010-0008 12/27/2023 Soil 12/28/2023 12/28/2023 TUS-20231227-MP02- SL01-00 332322010-0009 12/27/2023 Soil 12/28/2023 12/28/2023 TUS-20231227-MP03- SL01-00 332322010-0010 12/27/2023 Soil 12/28/2023 12/28/2023 TUS-20231227-MP04- SL01-00 332322010-0011 12/27/2023 Soil 12/28/2023 12/28/2023 TUS-20231227-AP01- SL01-00 332322010-0012 12/27/2023 Soil 12/28/2023 12/28/2023 TUS-20231227-AP02- SL01-00 332322010-0013 12/27/2023 Soil 12/28/2023 12/28/2023 TUS-20231227-AP03- SL01-00 332322010-0014 12/27/2023 Soil 12/28/2023 12/28/2023 TUS-20231227-AP04- SL01-00 332322010-0015 12/27/2023 Soil 12/28/2023 12/28/2023 1. Data Verification Check A data verification and completeness check was performed in accordance with the Stage 1 and 2A verification checks outlined in the EPA “Guidance for Labeling Externally Validated Laboratory Analytical Data for Superfund Use” dated January 13, 2009. For the metals analyses, all analytical data package items were received from the laboratory and the analyses requested were performed. 2. Holding Times The samples were extracted and analyzed within the recommended holding time of 180 days. 3. Blank Results One method blank was analyzed with the sample set and was free of target analyte contamination above the reporting limits (RLs). 4. Laboratory Control Sample (LCS) Results One LCS was analyzed with the sample set. The recoveries were within method QC limits of 80-120% for all analytes. 5. Matrix Spike (MS) and Matrix Spike Duplicate (MSD) Results A sample outside the sample set was used for MS/MSD analyses. Data Validation Report – January 18, 2024 Tustin Blimp Hangar Fire ER Laboratory: LA Testing, Huntington Beach, CA Laboratory Job Number: 332322010 3 6. Duplicate Results The laboratory conducted duplicate analysis using a sample outside the sample set. The sample set did not include any field duplicate pairs. 7. Overall Assessment The metals data are acceptable for use based on the information received. DATA QUALIFIER DEFINITIONS U The analyte was analyzed for but not detected above the RL. The associated value is the RL. ATTACHMENT LA TESTING RESULTS SUMMARY LA Testing 5431 Industrial Drive, Huntington Beach, CA 92649 Phone/Fax:(714) 828-4999 / (714) 828-4944 http://www.LATesting.com hblab@latesting.com 332322010 CustomerID:32WSTN78A CustomerPO:PO-0113124 ProjectID: LA Testing Order: Analytical Results Attn:Anthony Bird Weston Solutions, Inc. 5881 N Obispo Ave Suite 101 Long Beach, CA 90805 Received:12/27/2023 02:20 PM 20905.012.003.0196.00 Fax: Phone:(310) 663-1322 Project: 12/27/2023Collected: Client Sample Description Lab ID:TUS-20231227-CS01-SL01-00 332322010-0001Collected:12/27/2023 Method Parameter Result UnitsRL Analysis Date & Time Prep Date & Time METALS 3050B/6010D Antimony XL<4.8 mg/Kg 12/28/2023 4.8 12/28/2023 CM 3050B/6010D Arsenic XL<4.8 mg/Kg 12/28/2023 4.8 12/28/2023 CM 3050B/6010D Barium XL50mg/Kg 12/28/2023 4.8 12/28/2023 CM 3050B/6010D Beryllium XL<4.8 mg/Kg 12/28/2023 4.8 12/28/2023 CM 3050B/6010D Cadmium XL<4.8 mg/Kg 12/28/2023 4.8 12/28/2023 CM 3050B/6010D Chromium XL5.0 mg/Kg 12/28/2023 4.8 12/28/2023 CM 3050B/6010D Cobalt XL<4.8 mg/Kg 12/28/2023 4.8 12/28/2023 CM 3050B/6010D Copper XL14mg/Kg 12/28/2023 4.8 12/28/2023 CM 3050B/6010D Lead XL<4.8 mg/Kg 12/28/2023 4.8 12/28/2023 CM 3050B/6010D Molybdenum XL<4.8 mg/Kg 12/28/2023 4.8 12/28/2023 CM 3050B/6010D Nickel XL<4.8 mg/Kg 12/28/2023 4.8 12/28/2023 CM 3050B/6010D Selenium XL<4.8 mg/Kg 12/28/2023 4.8 12/28/2023 CM 3050B/6010D Silver XL<4.8 mg/Kg 12/28/2023 4.8 12/28/2023 CM 3050B/6010D Thallium XL<4.8 mg/Kg 12/28/2023 4.8 12/28/2023 CM 3050B/6010D Vanadium XL9.2 mg/Kg 12/28/2023 4.8 12/28/2023 CM 3050B/6010D Zinc XL66mg/Kg 12/28/2023 4.8 12/28/2023 CM Client Sample Description Lab ID:TUS-20231227-CS02-SL01-00 332322010-0002Collected:12/27/2023 Method Parameter Result UnitsRL Analysis Date & Time Prep Date & Time METALS 3050B/6010D Antimony XL<4.9 mg/Kg 12/28/2023 4.9 12/28/2023 CM 3050B/6010D Arsenic XL<4.9 mg/Kg 12/28/2023 4.9 12/28/2023 CM 3050B/6010D Barium XL85mg/Kg 12/28/2023 4.9 12/28/2023 CM 3050B/6010D Beryllium XL<4.9 mg/Kg 12/28/2023 4.9 12/28/2023 CM 3050B/6010D Cadmium XL<4.9 mg/Kg 12/28/2023 4.9 12/28/2023 CM 3050B/6010D Chromium XL8.4 mg/Kg 12/28/2023 4.9 12/28/2023 CM 3050B/6010D Cobalt XL<4.9 mg/Kg 12/28/2023 4.9 12/28/2023 CM 3050B/6010D Copper XL14mg/Kg 12/28/2023 4.9 12/28/2023 CM 3050B/6010D Lead XL5.9 mg/Kg 12/28/2023 4.9 12/28/2023 CM 3050B/6010D Molybdenum XL<4.9 mg/Kg 12/28/2023 4.9 12/28/2023 CM 3050B/6010D Nickel XL7.1 mg/Kg 12/28/2023 4.9 12/28/2023 CM 3050B/6010D Selenium XL<4.9 mg/Kg 12/28/2023 4.9 12/28/2023 CM 3050B/6010D Silver XL<4.9 mg/Kg 12/28/2023 4.9 12/28/2023 CM Page 2 of 11ChemSmplw/RDL/NELAC-2.19.0.0 Printed: 1/12/2024 11:38:27 AM LA Testing 5431 Industrial Drive, Huntington Beach, CA 92649 Phone/Fax:(714) 828-4999 / (714) 828-4944 http://www.LATesting.com hblab@latesting.com 332322010 CustomerID:32WSTN78A CustomerPO:PO-0113124 ProjectID: LA Testing Order: Analytical Results Attn:Anthony Bird Weston Solutions, Inc. 5881 N Obispo Ave Suite 101 Long Beach, CA 90805 Received:12/27/2023 02:20 PM 20905.012.003.0196.00 Fax: Phone:(310) 663-1322 Project: 12/27/2023Collected: Client Sample Description Lab ID:TUS-20231227-CS02-SL01-00 332322010-0002Collected:12/27/2023 Method Parameter Result UnitsRL Analysis Date & Time Prep Date & Time METALS 3050B/6010D Thallium XL<4.9 mg/Kg 12/28/2023 4.9 12/28/2023 CM 3050B/6010D Vanadium XL18mg/Kg 12/28/2023 4.9 12/28/2023 CM 3050B/6010D Zinc XL76mg/Kg 12/28/2023 4.9 12/28/2023 CM Client Sample Description Lab ID:TUS-20231227-CS03-SL01-00 332322010-0003Collected:12/27/2023 Method Parameter Result UnitsRL Analysis Date & Time Prep Date & Time METALS 3050B/6010D Antimony XL<4.9 mg/Kg 12/28/2023 4.9 12/28/2023 CM 3050B/6010D Arsenic XL<4.9 mg/Kg 12/28/2023 4.9 12/28/2023 CM 3050B/6010D Barium XL74mg/Kg 12/28/2023 4.9 12/28/2023 CM 3050B/6010D Beryllium XL<4.9 mg/Kg 12/28/2023 4.9 12/28/2023 CM 3050B/6010D Cadmium XL<4.9 mg/Kg 12/28/2023 4.9 12/28/2023 CM 3050B/6010D Chromium XL7.7 mg/Kg 12/28/2023 4.9 12/28/2023 CM 3050B/6010D Cobalt XL<4.9 mg/Kg 12/28/2023 4.9 12/28/2023 CM 3050B/6010D Copper XL12mg/Kg 12/28/2023 4.9 12/28/2023 CM 3050B/6010D Lead XL<4.9 mg/Kg 12/28/2023 4.9 12/28/2023 CM 3050B/6010D Molybdenum XL<4.9 mg/Kg 12/28/2023 4.9 12/28/2023 CM 3050B/6010D Nickel XL6.6 mg/Kg 12/28/2023 4.9 12/28/2023 CM 3050B/6010D Selenium XL<4.9 mg/Kg 12/28/2023 4.9 12/28/2023 CM 3050B/6010D Silver XL<4.9 mg/Kg 12/28/2023 4.9 12/28/2023 CM 3050B/6010D Thallium XL<4.9 mg/Kg 12/28/2023 4.9 12/28/2023 CM 3050B/6010D Vanadium XL19mg/Kg 12/28/2023 4.9 12/28/2023 CM 3050B/6010D Zinc XL65mg/Kg 12/28/2023 4.9 12/28/2023 CM Client Sample Description Lab ID:TUS-20231227-CS04-SL01-00 332322010-0004Collected:12/27/2023 Method Parameter Result UnitsRL Analysis Date & Time Prep Date & Time METALS 3050B/6010D Antimony XL<4.9 mg/Kg 12/28/2023 4.9 12/28/2023 CM 3050B/6010D Arsenic XL<4.9 mg/Kg 12/28/2023 4.9 12/28/2023 CM 3050B/6010D Barium XL94mg/Kg 12/28/2023 4.9 12/28/2023 CM 3050B/6010D Beryllium XL<4.9 mg/Kg 12/28/2023 4.9 12/28/2023 CM Page 3 of 11ChemSmplw/RDL/NELAC-2.19.0.0 Printed: 1/12/2024 11:38:27 AM LA Testing 5431 Industrial Drive, Huntington Beach, CA 92649 Phone/Fax:(714) 828-4999 / (714) 828-4944 http://www.LATesting.com hblab@latesting.com 332322010 CustomerID:32WSTN78A CustomerPO:PO-0113124 ProjectID: LA Testing Order: Analytical Results Attn:Anthony Bird Weston Solutions, Inc. 5881 N Obispo Ave Suite 101 Long Beach, CA 90805 Received:12/27/2023 02:20 PM 20905.012.003.0196.00 Fax: Phone:(310) 663-1322 Project: 12/27/2023Collected: Client Sample Description Lab ID:TUS-20231227-CS04-SL01-00 332322010-0004Collected:12/27/2023 Method Parameter Result UnitsRL Analysis Date & Time Prep Date & Time METALS 3050B/6010D Cadmium XL<4.9 mg/Kg 12/28/2023 4.9 12/28/2023 CM 3050B/6010D Chromium XL11mg/Kg 12/28/2023 4.9 12/28/2023 CM 3050B/6010D Cobalt XL<4.9 mg/Kg 12/28/2023 4.9 12/28/2023 CM 3050B/6010D Copper XL20mg/Kg 12/28/2023 4.9 12/28/2023 CM 3050B/6010D Lead XL12mg/Kg 12/28/2023 4.9 12/28/2023 CM 3050B/6010D Molybdenum XL<4.9 mg/Kg 12/28/2023 4.9 12/28/2023 CM 3050B/6010D Nickel XL7.3 mg/Kg 12/28/2023 4.9 12/28/2023 CM 3050B/6010D Selenium XL<4.9 mg/Kg 12/28/2023 4.9 12/28/2023 CM 3050B/6010D Silver XL<4.9 mg/Kg 12/28/2023 4.9 12/28/2023 CM 3050B/6010D Thallium XL<4.9 mg/Kg 12/28/2023 4.9 12/28/2023 CM 3050B/6010D Vanadium XL19mg/Kg 12/28/2023 4.9 12/28/2023 CM 3050B/6010D Zinc XL78mg/Kg 12/28/2023 4.9 12/28/2023 CM Client Sample Description Lab ID:TUS-20231227-CS05-SL01-00 332322010-0005Collected:12/27/2023 Method Parameter Result UnitsRL Analysis Date & Time Prep Date & Time METALS 3050B/6010D Antimony XL<4.8 mg/Kg 12/28/2023 4.8 12/28/2023 CM 3050B/6010D Arsenic XL<4.8 mg/Kg 12/28/2023 4.8 12/28/2023 CM 3050B/6010D Barium XL82mg/Kg 12/28/2023 4.8 12/28/2023 CM 3050B/6010D Beryllium XL<4.8 mg/Kg 12/28/2023 4.8 12/28/2023 CM 3050B/6010D Cadmium XL<4.8 mg/Kg 12/28/2023 4.8 12/28/2023 CM 3050B/6010D Chromium XL9.8 mg/Kg 12/28/2023 4.8 12/28/2023 CM 3050B/6010D Cobalt XL<4.8 mg/Kg 12/28/2023 4.8 12/28/2023 CM 3050B/6010D Copper XL18mg/Kg 12/28/2023 4.8 12/28/2023 CM 3050B/6010D Lead XL6.7 mg/Kg 12/28/2023 4.8 12/28/2023 CM 3050B/6010D Molybdenum XL<4.8 mg/Kg 12/28/2023 4.8 12/28/2023 CM 3050B/6010D Nickel XL8.2 mg/Kg 12/28/2023 4.8 12/28/2023 CM 3050B/6010D Selenium XL<4.8 mg/Kg 12/28/2023 4.8 12/28/2023 CM 3050B/6010D Silver XL<4.8 mg/Kg 12/28/2023 4.8 12/28/2023 CM 3050B/6010D Thallium XL<4.8 mg/Kg 12/28/2023 4.8 12/28/2023 CM 3050B/6010D Vanadium XL19mg/Kg 12/28/2023 4.8 12/28/2023 CM 3050B/6010D Zinc XL81mg/Kg 12/28/2023 4.8 12/28/2023 CM Page 4 of 11ChemSmplw/RDL/NELAC-2.19.0.0 Printed: 1/12/2024 11:38:27 AM LA Testing 5431 Industrial Drive, Huntington Beach, CA 92649 Phone/Fax:(714) 828-4999 / (714) 828-4944 http://www.LATesting.com hblab@latesting.com 332322010 CustomerID:32WSTN78A CustomerPO:PO-0113124 ProjectID: LA Testing Order: Analytical Results Attn:Anthony Bird Weston Solutions, Inc. 5881 N Obispo Ave Suite 101 Long Beach, CA 90805 Received:12/27/2023 02:20 PM 20905.012.003.0196.00 Fax: Phone:(310) 663-1322 Project: 12/27/2023Collected: Client Sample Description Lab ID:TUS-20231227-CS06-SL01-00 332322010-0006Collected:12/27/2023 Method Parameter Result UnitsRL Analysis Date & Time Prep Date & Time METALS 3050B/6010D Antimony XL<4.8 mg/Kg 12/28/2023 4.8 12/28/2023 CM 3050B/6010D Arsenic XL<4.8 mg/Kg 12/28/2023 4.8 12/28/2023 CM 3050B/6010D Barium XL91mg/Kg 12/28/2023 4.8 12/28/2023 CM 3050B/6010D Beryllium XL<4.8 mg/Kg 12/28/2023 4.8 12/28/2023 CM 3050B/6010D Cadmium XL<4.8 mg/Kg 12/28/2023 4.8 12/28/2023 CM 3050B/6010D Chromium XL9.0 mg/Kg 12/28/2023 4.8 12/28/2023 CM 3050B/6010D Cobalt XL<4.8 mg/Kg 12/28/2023 4.8 12/28/2023 CM 3050B/6010D Copper XL14mg/Kg 12/28/2023 4.8 12/28/2023 CM 3050B/6010D Lead XL6.6 mg/Kg 12/28/2023 4.8 12/28/2023 CM 3050B/6010D Molybdenum XL<4.8 mg/Kg 12/28/2023 4.8 12/28/2023 CM 3050B/6010D Nickel XL7.2 mg/Kg 12/28/2023 4.8 12/28/2023 CM 3050B/6010D Selenium XL<4.8 mg/Kg 12/28/2023 4.8 12/28/2023 CM 3050B/6010D Silver XL<4.8 mg/Kg 12/28/2023 4.8 12/28/2023 CM 3050B/6010D Thallium XL<4.8 mg/Kg 12/28/2023 4.8 12/28/2023 CM 3050B/6010D Vanadium XL19mg/Kg 12/28/2023 4.8 12/28/2023 CM 3050B/6010D Zinc XL58mg/Kg 12/28/2023 4.8 12/28/2023 CM Client Sample Description Lab ID:TUS-20231227-CS07-SL01-00 332322010-0007Collected:12/27/2023 Method Parameter Result UnitsRL Analysis Date & Time Prep Date & Time METALS 3050B/6010D Antimony XL<4.6 mg/Kg 12/28/2023 4.6 12/28/2023 CM 3050B/6010D Arsenic XL<4.6 mg/Kg 12/28/2023 4.6 12/28/2023 CM 3050B/6010D Barium XL76mg/Kg 12/28/2023 4.6 12/28/2023 CM 3050B/6010D Beryllium XL<4.6 mg/Kg 12/28/2023 4.6 12/28/2023 CM 3050B/6010D Cadmium XL<4.6 mg/Kg 12/28/2023 4.6 12/28/2023 CM 3050B/6010D Chromium XL9.3 mg/Kg 12/28/2023 4.6 12/28/2023 CM 3050B/6010D Cobalt XL<4.6 mg/Kg 12/28/2023 4.6 12/28/2023 CM 3050B/6010D Copper XL12mg/Kg 12/28/2023 4.6 12/28/2023 CM 3050B/6010D Lead XL6.1 mg/Kg 12/28/2023 4.6 12/28/2023 CM 3050B/6010D Molybdenum XL<4.6 mg/Kg 12/28/2023 4.6 12/28/2023 CM 3050B/6010D Nickel XL6.9 mg/Kg 12/28/2023 4.6 12/28/2023 CM 3050B/6010D Selenium XL<4.6 mg/Kg 12/28/2023 4.6 12/28/2023 CM 3050B/6010D Silver XL<4.6 mg/Kg 12/28/2023 4.6 12/28/2023 CM Page 5 of 11ChemSmplw/RDL/NELAC-2.19.0.0 Printed: 1/12/2024 11:38:27 AM LA Testing 5431 Industrial Drive, Huntington Beach, CA 92649 Phone/Fax:(714) 828-4999 / (714) 828-4944 http://www.LATesting.com hblab@latesting.com 332322010 CustomerID:32WSTN78A CustomerPO:PO-0113124 ProjectID: LA Testing Order: Analytical Results Attn:Anthony Bird Weston Solutions, Inc. 5881 N Obispo Ave Suite 101 Long Beach, CA 90805 Received:12/27/2023 02:20 PM 20905.012.003.0196.00 Fax: Phone:(310) 663-1322 Project: 12/27/2023Collected: Client Sample Description Lab ID:TUS-20231227-CS07-SL01-00 332322010-0007Collected:12/27/2023 Method Parameter Result UnitsRL Analysis Date & Time Prep Date & Time METALS 3050B/6010D Thallium XL<4.6 mg/Kg 12/28/2023 4.6 12/28/2023 CM 3050B/6010D Vanadium XL19mg/Kg 12/28/2023 4.6 12/28/2023 CM 3050B/6010D Zinc XL51mg/Kg 12/28/2023 4.6 12/28/2023 CM Client Sample Description Lab ID:TUS-20231227-MP01-SL01-00 332322010-0008Collected:12/27/2023 Method Parameter Result UnitsRL Analysis Date & Time Prep Date & Time METALS 3050B/6010D Antimony XL<4.9 mg/Kg 12/28/2023 4.9 12/28/2023 CM 3050B/6010D Arsenic XL<4.9 mg/Kg 12/28/2023 4.9 12/28/2023 CM 3050B/6010D Barium XL85mg/Kg 12/28/2023 4.9 12/28/2023 CM 3050B/6010D Beryllium XL<4.9 mg/Kg 12/28/2023 4.9 12/28/2023 CM 3050B/6010D Cadmium XL<4.9 mg/Kg 12/28/2023 4.9 12/28/2023 CM 3050B/6010D Chromium XL10mg/Kg 12/28/2023 4.9 12/28/2023 CM 3050B/6010D Cobalt XL<4.9 mg/Kg 12/28/2023 4.9 12/28/2023 CM 3050B/6010D Copper XL17mg/Kg 12/28/2023 4.9 12/28/2023 CM 3050B/6010D Lead XL7.8 mg/Kg 12/28/2023 4.9 12/28/2023 CM 3050B/6010D Molybdenum XL<4.9 mg/Kg 12/28/2023 4.9 12/28/2023 CM 3050B/6010D Nickel XL7.5 mg/Kg 12/28/2023 4.9 12/28/2023 CM 3050B/6010D Selenium XL<4.9 mg/Kg 12/28/2023 4.9 12/28/2023 CM 3050B/6010D Silver XL<4.9 mg/Kg 12/28/2023 4.9 12/28/2023 CM 3050B/6010D Thallium XL<4.9 mg/Kg 12/28/2023 4.9 12/28/2023 CM 3050B/6010D Vanadium XL20mg/Kg 12/28/2023 4.9 12/28/2023 CM 3050B/6010D Zinc XL66mg/Kg 12/28/2023 4.9 12/28/2023 CM Client Sample Description Lab ID:TUS-20231227-MP02-SL01-00 332322010-0009Collected:12/27/2023 Method Parameter Result UnitsRL Analysis Date & Time Prep Date & Time METALS 3050B/6010D Antimony XL<4.8 mg/Kg 12/28/2023 4.8 12/28/2023 CM 3050B/6010D Arsenic XL<4.8 mg/Kg 12/28/2023 4.8 12/28/2023 CM 3050B/6010D Barium XL55mg/Kg 12/28/2023 4.8 12/28/2023 CM 3050B/6010D Beryllium XL<4.8 mg/Kg 12/28/2023 4.8 12/28/2023 CM Page 6 of 11ChemSmplw/RDL/NELAC-2.19.0.0 Printed: 1/12/2024 11:38:27 AM LA Testing 5431 Industrial Drive, Huntington Beach, CA 92649 Phone/Fax:(714) 828-4999 / (714) 828-4944 http://www.LATesting.com hblab@latesting.com 332322010 CustomerID:32WSTN78A CustomerPO:PO-0113124 ProjectID: LA Testing Order: Analytical Results Attn:Anthony Bird Weston Solutions, Inc. 5881 N Obispo Ave Suite 101 Long Beach, CA 90805 Received:12/27/2023 02:20 PM 20905.012.003.0196.00 Fax: Phone:(310) 663-1322 Project: 12/27/2023Collected: Client Sample Description Lab ID:TUS-20231227-MP02-SL01-00 332322010-0009Collected:12/27/2023 Method Parameter Result UnitsRL Analysis Date & Time Prep Date & Time METALS 3050B/6010D Cadmium XL<4.8 mg/Kg 12/28/2023 4.8 12/28/2023 CM 3050B/6010D Chromium XL6.0 mg/Kg 12/28/2023 4.8 12/28/2023 CM 3050B/6010D Cobalt XL<4.8 mg/Kg 12/28/2023 4.8 12/28/2023 CM 3050B/6010D Copper XL10mg/Kg 12/28/2023 4.8 12/28/2023 CM 3050B/6010D Lead XL<4.8 mg/Kg 12/28/2023 4.8 12/28/2023 CM 3050B/6010D Molybdenum XL<4.8 mg/Kg 12/28/2023 4.8 12/28/2023 CM 3050B/6010D Nickel XL4.9 mg/Kg 12/28/2023 4.8 12/28/2023 CM 3050B/6010D Selenium XL<4.8 mg/Kg 12/28/2023 4.8 12/28/2023 CM 3050B/6010D Silver XL<4.8 mg/Kg 12/28/2023 4.8 12/28/2023 CM 3050B/6010D Thallium XL<4.8 mg/Kg 12/28/2023 4.8 12/28/2023 CM 3050B/6010D Vanadium XL14mg/Kg 12/28/2023 4.8 12/28/2023 CM 3050B/6010D Zinc XL44mg/Kg 12/28/2023 4.8 12/28/2023 CM Client Sample Description Lab ID:TUS-20231227-MP03-SL01-00 332322010-0010Collected:12/27/2023 Method Parameter Result UnitsRL Analysis Date & Time Prep Date & Time METALS 3050B/6010D Antimony XL<4.8 mg/Kg 12/28/2023 4.8 12/28/2023 CM 3050B/6010D Arsenic XL5.0 mg/Kg 12/28/2023 4.8 12/28/2023 CM 3050B/6010D Barium XL100mg/Kg 12/28/2023 4.8 12/28/2023 CM 3050B/6010D Beryllium XL<4.8 mg/Kg 12/28/2023 4.8 12/28/2023 CM 3050B/6010D Cadmium XL<4.8 mg/Kg 12/28/2023 4.8 12/28/2023 CM 3050B/6010D Chromium XL12mg/Kg 12/28/2023 4.8 12/28/2023 CM 3050B/6010D Cobalt XL5.1 mg/Kg 12/28/2023 4.8 12/28/2023 CM 3050B/6010D Copper XL17mg/Kg 12/28/2023 4.8 12/28/2023 CM 3050B/6010D Lead XL6.7 mg/Kg 12/28/2023 4.8 12/28/2023 CM 3050B/6010D Molybdenum XL<4.8 mg/Kg 12/28/2023 4.8 12/28/2023 CM 3050B/6010D Nickel XL9.9 mg/Kg 12/28/2023 4.8 12/28/2023 CM 3050B/6010D Selenium XL<4.8 mg/Kg 12/28/2023 4.8 12/28/2023 CM 3050B/6010D Silver XL<4.8 mg/Kg 12/28/2023 4.8 12/28/2023 CM 3050B/6010D Thallium XL<4.8 mg/Kg 12/28/2023 4.8 12/28/2023 CM 3050B/6010D Vanadium XL25mg/Kg 12/28/2023 4.8 12/28/2023 CM 3050B/6010D Zinc XL55mg/Kg 12/28/2023 4.8 12/28/2023 CM Page 7 of 11ChemSmplw/RDL/NELAC-2.19.0.0 Printed: 1/12/2024 11:38:27 AM LA Testing 5431 Industrial Drive, Huntington Beach, CA 92649 Phone/Fax:(714) 828-4999 / (714) 828-4944 http://www.LATesting.com hblab@latesting.com 332322010 CustomerID:32WSTN78A CustomerPO:PO-0113124 ProjectID: LA Testing Order: Analytical Results Attn:Anthony Bird Weston Solutions, Inc. 5881 N Obispo Ave Suite 101 Long Beach, CA 90805 Received:12/27/2023 02:20 PM 20905.012.003.0196.00 Fax: Phone:(310) 663-1322 Project: 12/27/2023Collected: Client Sample Description Lab ID:TUS-20231227-MP04-SL01-00 332322010-0011Collected:12/27/2023 Method Parameter Result UnitsRL Analysis Date & Time Prep Date & Time METALS 3050B/6010D Antimony XL<4.8 mg/Kg 12/28/2023 4.8 12/28/2023 CM 3050B/6010D Arsenic XL<4.8 mg/Kg 12/28/2023 4.8 12/28/2023 CM 3050B/6010D Barium XL94mg/Kg 12/28/2023 4.8 12/28/2023 CM 3050B/6010D Beryllium XL<4.8 mg/Kg 12/28/2023 4.8 12/28/2023 CM 3050B/6010D Cadmium XL<4.8 mg/Kg 12/28/2023 4.8 12/28/2023 CM 3050B/6010D Chromium XL11mg/Kg 12/28/2023 4.8 12/28/2023 CM 3050B/6010D Cobalt XL<4.8 mg/Kg 12/28/2023 4.8 12/28/2023 CM 3050B/6010D Copper XL20mg/Kg 12/28/2023 4.8 12/28/2023 CM 3050B/6010D Lead XL7.0 mg/Kg 12/28/2023 4.8 12/28/2023 CM 3050B/6010D Molybdenum XL<4.8 mg/Kg 12/28/2023 4.8 12/28/2023 CM 3050B/6010D Nickel XL8.6 mg/Kg 12/28/2023 4.8 12/28/2023 CM 3050B/6010D Selenium XL<4.8 mg/Kg 12/28/2023 4.8 12/28/2023 CM 3050B/6010D Silver XL<4.8 mg/Kg 12/28/2023 4.8 12/28/2023 CM 3050B/6010D Thallium XL<4.8 mg/Kg 12/28/2023 4.8 12/28/2023 CM 3050B/6010D Vanadium XL21mg/Kg 12/28/2023 4.8 12/28/2023 CM 3050B/6010D Zinc XL70mg/Kg 12/28/2023 4.8 12/28/2023 CM Client Sample Description Lab ID:TUS-20231227-AP01-SL01-00 332322010-0012Collected:12/27/2023 Method Parameter Result UnitsRL Analysis Date & Time Prep Date & Time METALS 3050B/6010D Antimony XL<4.6 mg/Kg 12/28/2023 4.6 12/28/2023 CM 3050B/6010D Arsenic XL<4.6 mg/Kg 12/28/2023 4.6 12/28/2023 CM 3050B/6010D Barium XL71mg/Kg 12/28/2023 4.6 12/28/2023 CM 3050B/6010D Beryllium XL<4.6 mg/Kg 12/28/2023 4.6 12/28/2023 CM 3050B/6010D Cadmium XL<4.6 mg/Kg 12/28/2023 4.6 12/28/2023 CM 3050B/6010D Chromium XL9.6 mg/Kg 12/28/2023 4.6 12/28/2023 CM 3050B/6010D Cobalt XL<4.6 mg/Kg 12/28/2023 4.6 12/28/2023 CM 3050B/6010D Copper XL14mg/Kg 12/28/2023 4.6 12/28/2023 CM 3050B/6010D Lead XL6.3 mg/Kg 12/28/2023 4.6 12/28/2023 CM 3050B/6010D Molybdenum XL<4.6 mg/Kg 12/28/2023 4.6 12/28/2023 CM 3050B/6010D Nickel XL7.1 mg/Kg 12/28/2023 4.6 12/28/2023 CM 3050B/6010D Selenium XL<4.6 mg/Kg 12/28/2023 4.6 12/28/2023 CM 3050B/6010D Silver XL<4.6 mg/Kg 12/28/2023 4.6 12/28/2023 CM Page 8 of 11ChemSmplw/RDL/NELAC-2.19.0.0 Printed: 1/12/2024 11:38:27 AM LA Testing 5431 Industrial Drive, Huntington Beach, CA 92649 Phone/Fax:(714) 828-4999 / (714) 828-4944 http://www.LATesting.com hblab@latesting.com 332322010 CustomerID:32WSTN78A CustomerPO:PO-0113124 ProjectID: LA Testing Order: Analytical Results Attn:Anthony Bird Weston Solutions, Inc. 5881 N Obispo Ave Suite 101 Long Beach, CA 90805 Received:12/27/2023 02:20 PM 20905.012.003.0196.00 Fax: Phone:(310) 663-1322 Project: 12/27/2023Collected: Client Sample Description Lab ID:TUS-20231227-AP01-SL01-00 332322010-0012Collected:12/27/2023 Method Parameter Result UnitsRL Analysis Date & Time Prep Date & Time METALS 3050B/6010D Thallium XL<4.6 mg/Kg 12/28/2023 4.6 12/28/2023 CM 3050B/6010D Vanadium XL18mg/Kg 12/28/2023 4.6 12/28/2023 CM 3050B/6010D Zinc XL62mg/Kg 12/28/2023 4.6 12/28/2023 CM Client Sample Description Lab ID:TUS-20231227-AP02-SL01-00 332322010-0013Collected:12/27/2023 Method Parameter Result UnitsRL Analysis Date & Time Prep Date & Time METALS 3050B/6010D Antimony XL<4.3 mg/Kg 12/28/2023 4.3 12/28/2023 CM 3050B/6010D Arsenic XL<4.3 mg/Kg 12/28/2023 4.3 12/28/2023 CM 3050B/6010D Barium XL67mg/Kg 12/28/2023 4.3 12/28/2023 CM 3050B/6010D Beryllium XL<4.3 mg/Kg 12/28/2023 4.3 12/28/2023 CM 3050B/6010D Cadmium XL<4.3 mg/Kg 12/28/2023 4.3 12/28/2023 CM 3050B/6010D Chromium XL9.7 mg/Kg 12/28/2023 4.3 12/28/2023 CM 3050B/6010D Cobalt XL<4.3 mg/Kg 12/28/2023 4.3 12/28/2023 CM 3050B/6010D Copper XL17mg/Kg 12/28/2023 4.3 12/28/2023 CM 3050B/6010D Lead XL4.9 mg/Kg 12/28/2023 4.3 12/28/2023 CM 3050B/6010D Molybdenum XL<4.3 mg/Kg 12/28/2023 4.3 12/28/2023 CM 3050B/6010D Nickel XL7.5 mg/Kg 12/28/2023 4.3 12/28/2023 CM 3050B/6010D Selenium XL<4.3 mg/Kg 12/28/2023 4.3 12/28/2023 CM 3050B/6010D Silver XL<4.3 mg/Kg 12/28/2023 4.3 12/28/2023 CM 3050B/6010D Thallium XL<4.3 mg/Kg 12/28/2023 4.3 12/28/2023 CM 3050B/6010D Vanadium XL19mg/Kg 12/28/2023 4.3 12/28/2023 CM 3050B/6010D Zinc XL48mg/Kg 12/28/2023 4.3 12/28/2023 CM Client Sample Description Lab ID:TUS-20231227-AP03-SL01-00 332322010-0014Collected:12/27/2023 Method Parameter Result UnitsRL Analysis Date & Time Prep Date & Time METALS 3050B/6010D Antimony XL<4.6 mg/Kg 12/28/2023 4.6 12/28/2023 CM 3050B/6010D Arsenic XL<4.6 mg/Kg 12/28/2023 4.6 12/28/2023 CM 3050B/6010D Barium XL70mg/Kg 12/28/2023 4.6 12/28/2023 CM 3050B/6010D Beryllium XL<4.6 mg/Kg 12/28/2023 4.6 12/28/2023 CM Page 9 of 11ChemSmplw/RDL/NELAC-2.19.0.0 Printed: 1/12/2024 11:38:27 AM LA Testing 5431 Industrial Drive, Huntington Beach, CA 92649 Phone/Fax:(714) 828-4999 / (714) 828-4944 http://www.LATesting.com hblab@latesting.com 332322010 CustomerID:32WSTN78A CustomerPO:PO-0113124 ProjectID: LA Testing Order: Analytical Results Attn:Anthony Bird Weston Solutions, Inc. 5881 N Obispo Ave Suite 101 Long Beach, CA 90805 Received:12/27/2023 02:20 PM 20905.012.003.0196.00 Fax: Phone:(310) 663-1322 Project: 12/27/2023Collected: Client Sample Description Lab ID:TUS-20231227-AP03-SL01-00 332322010-0014Collected:12/27/2023 Method Parameter Result UnitsRL Analysis Date & Time Prep Date & Time METALS 3050B/6010D Cadmium XL<4.6 mg/Kg 12/28/2023 4.6 12/28/2023 CM 3050B/6010D Chromium XL8.5 mg/Kg 12/28/2023 4.6 12/28/2023 CM 3050B/6010D Cobalt XL<4.6 mg/Kg 12/28/2023 4.6 12/28/2023 CM 3050B/6010D Copper XL15mg/Kg 12/28/2023 4.6 12/28/2023 CM 3050B/6010D Lead XL5.5 mg/Kg 12/28/2023 4.6 12/28/2023 CM 3050B/6010D Molybdenum XL<4.6 mg/Kg 12/28/2023 4.6 12/28/2023 CM 3050B/6010D Nickel XL7.1 mg/Kg 12/28/2023 4.6 12/28/2023 CM 3050B/6010D Selenium XL<4.6 mg/Kg 12/28/2023 4.6 12/28/2023 CM 3050B/6010D Silver XL<4.6 mg/Kg 12/28/2023 4.6 12/28/2023 CM 3050B/6010D Thallium XL<4.6 mg/Kg 12/28/2023 4.6 12/28/2023 CM 3050B/6010D Vanadium XL21mg/Kg 12/28/2023 4.6 12/28/2023 CM 3050B/6010D Zinc XL53mg/Kg 12/28/2023 4.6 12/28/2023 CM Client Sample Description Lab ID:TUS-20231227-AP04-SL01-00 332322010-0015Collected:12/27/2023 Method Parameter Result UnitsRL Analysis Date & Time Prep Date & Time METALS 3050B/6010D Antimony XL<4.3 mg/Kg 12/28/2023 4.3 12/28/2023 CM 3050B/6010D Arsenic XL<4.3 mg/Kg 12/28/2023 4.3 12/28/2023 CM 3050B/6010D Barium XL78mg/Kg 12/28/2023 4.3 12/28/2023 CM 3050B/6010D Beryllium XL<4.3 mg/Kg 12/28/2023 4.3 12/28/2023 CM 3050B/6010D Cadmium XL<4.3 mg/Kg 12/28/2023 4.3 12/28/2023 CM 3050B/6010D Chromium XL11mg/Kg 12/28/2023 4.3 12/28/2023 CM 3050B/6010D Cobalt XL<4.3 mg/Kg 12/28/2023 4.3 12/28/2023 CM 3050B/6010D Copper XL13mg/Kg 12/28/2023 4.3 12/28/2023 CM 3050B/6010D Lead XL5.3 mg/Kg 12/28/2023 4.3 12/28/2023 CM 3050B/6010D Molybdenum XL<4.3 mg/Kg 12/28/2023 4.3 12/28/2023 CM 3050B/6010D Nickel XL7.7 mg/Kg 12/28/2023 4.3 12/28/2023 CM 3050B/6010D Selenium XL<4.3 mg/Kg 12/28/2023 4.3 12/28/2023 CM 3050B/6010D Silver XL<4.3 mg/Kg 12/28/2023 4.3 12/28/2023 CM 3050B/6010D Thallium XL<4.3 mg/Kg 12/28/2023 4.3 12/28/2023 CM 3050B/6010D Vanadium XL20mg/Kg 12/28/2023 4.3 12/28/2023 CM 3050B/6010D Zinc XL55mg/Kg 12/28/2023 4.3 12/28/2023 CM Page 10 of 11ChemSmplw/RDL/NELAC-2.19.0.0 Printed: 1/12/2024 11:38:27 AM