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HomeMy WebLinkAbout125-22 Residence at 9th Phase II Supplemental Metals Assessment Report1iIICIS5tfX#St.WIImIfVon,NC nry Nemargut 28405 August 17, 2023 Sam Hamad 2500 Bridges Street, Unit 11 Morehead City, NC 28557 Engineering Phone (9I0) 762 5475 Services FAX • (9I0) 762-3284 Reference: RCRA Metals Sampling Letter Report 901 and 909 Shepard Street Property Carteret County Parcels PIN # 63861960560000 and 6386196035660000 901 and 909 Shepard Street, Morehead City, NC 28577 Dear Mr. Hamad: Per the June 1, 2023 request from the NCDEQ, contained herein is a report summarizing limited RCRA Metals soil sampling activities for the above referenced parcels. Figure 1 illustrates the location of the project site on a Historical 1949 USGS topographic map, and Figure 2 illustrates the approximate locations of the soil samples collected for analyses. On June 15, 2023, FIN Engineering mobilized to the site to collect samples from stockpiled surface concrete debris originating from the concrete paved areas of the site on which past boat coating operations were performed. The purpose of collecting these samples was to ensure that leachable RCRA metals are not present in this concrete debris scheduled for removal for off -site disposal. To evaluate these materials for leachable metals, 2 samples of surface concrete were collected for subsequent analyses utilizing EPA Methods 6010 MET ICP, TCLP, with Mercury analyses via 7470, TCLP. Concrete debris samples collected from the 901 parcel were obtained as specified in the collection, preparation, preservation, and handling section of the specific method. Each container was labeled with sample location, analyses to be performed, time, date, and the sampler's name. They were then placed in a cooler and chilled with ice to approximately 40C in preparation for transportation to the analytical laboratory utilizing EPA approved chain of custody procedures. On July 27, 2023, FIN Engineering returned to the site to collect in -situ soil samples for analyses utilizing EPA Methods 6010D, with Mercury analyses via 7471B, and Hexavalent Chrome via low detection method 7199. To initiate sampling operations, a soil sample was obtained from an area in the northeast corner of the 901 parcel on which no boat repair operations were historically performed (labeled BF). This background sample and all additional soil samples obtained from both the 901 and 909 parcels were obtained via hand auger from in -situ soils at an approximate depth of 6" to 10" below surface. Samples collected from the 901 parcel were obtained from areas of the site where boat repair and coatings operations were historically performed and labeled B2, B3, and B4. Refer to Figure 2 for locations of background sample B1 and in -situ samples B2, B3, and B4. Samples obtained from the 909 Shepard Street parcel on July 27, 2023 were obtained from areas of the site on which petroleum service station and treated marine timber storage operations were performed in the approximate locations illustrated on Figure 2 and labeled B5 though B10. The soil samples from both Shepard Street parcels were obtained as specified in the collection, preservation, and handling section of the specific method. Each container was labeled with sample location, analyses to be performed, time, date, and the sampler's name. They were then placed in a cooler and chilled with ice to approximately 40C in preparation for transportation to the analytical laboratory utilizing EPA approved chain of custody procedures. Laboratory analytical results for the stockpiled concrete debris samples collected on June 15, 2023 failed to indicate the presence of any TCLP metals in these materials above Method Detection Limits. Analytical results for all in -situ samples B2 through B9 collected from historical boat repair, service station, and marine timber storage locations at the 901 and 909 parcels failed to indicate the presence of any RCRA metals in soils above NCDEQ PSRGs. Background soil sample Bl obtained from the northeast corner of the 901 Shepard Street parcel exhibited Arsenic at a concentration of 5.78 mg/kg, above Residential/Industrial/Commercial PSRGs but below its Protection of Groundwater PSRG of 5.8 mg/kg. No other RCRA metals were above PSRGs in background sample Bl. Table 1 summarizes the laboratory analytical results for samples collected from the 901 Shepard Street parcel including background sample B 1, and Table 2 summarizes results for samples B5 through B 10 obtained from the 909 Shepard Street parcel. Appendix A contains a copy of the laboratory analytical report and chain of custody records for the concrete debris TCLP metals samples, along with RCRA metals analytical results for the 901 and 909 in -situ soil samples. Review of the 1949 USGS topographic map included as Figure 1 verifies that some or all of the surface soils which currently comprise the entire 901 Shepard Street parcel originated from off - site sources of unknown origin. In 1984, the USGS published a paper (# 1270) documenting naturally occurring elemental concentrations in soils in the eastern coastal plain. Page 4 of this paper documents that Arsenic concentration in soils averages 7.2 mg/kg. Since the Arsenic concentration in background sample Bl obtained from the northeast corner of the 901 parcel indicated a concentration of 5.78 mg/kg, it can be concluded that some of the soils obtained from unknown off -site sources which were used to fill in the northeastern corner of the 901 Shepard Street parcel contain naturally occurring Arsenic at a concentration below the documented USGS average. A portion of this USGS publication is included in Appendix B. Based on my evaluation of the analytical data obtained from the 901 and 909 Shepard Street parcels, I find no reason to warrant further metals investigations of these sites. Mr. Hamad, please contact me at (910) 762-5475 if you have questions regarding this report. Sincerely, Henry Nemargut, P.E., Henry Nemargut Engineering Services FIGURES FIGURE 1: HISTORICAL USGS TOPO MAP - 1949 lg _1 c y ►� -'� - -J wer any �q ... is IJ E Non o )n JWa,ll oe r J ------- j ism 13 T , 901 Parcel Location bor far -'� WA 7-ER wA Y a LL r TABLES Table 1 RCRA Metals Soil Laboratory Analytical Results Residence @ 9th - 901 Parcel, PIN # 63861960560000 901 Shepard Street, Morehead City, NC 28557 ANALYTE SAMPLE IDENTIFICATION Protection of Groundwater PSRG Residential PSRG Industrial/Commercial PSRG B1 (Backg) B2 B3 B4 SAMPLE DEPTH (feetbgs) 0.5' - 0.75' 0.5' -0.75' 0.5' -0.75' 0.5' -0.75' Priority Pollutant Metals (mg/kg) Arsenic 5.78 BDL BDL BDL 5.8 0.68 3 Barium 90.4 30.3 32.3 15.6 580 3,100 47,000 Cadmium BDL BDL BDL BDL 3.0 14 200 Chromium, total 8.48 2.68 3.01 5.61 360,000 23,000 350,000 Chromium VI* BDL BDL BDL BDL 3.8 0.31 6.5 Lead 29.3 43.3 38.7 77.3 270 400 800 Mercury 0.134 0.121 0.117 0.126 1.0 2.3 9.7 Selenium BDL BDL BDL BDL 2.1 78 1,200 Silver BDL BDL BDL BDL 3.4 78 1,200 Note: Metals analysis via Method 6010D, 7471B * Hex Chrome via 7199 Table 2 RCRA Metals Soil Laboratory Analytical Results Residence @ 9th - 909 Parcel, PIN # 6386196035660000 901 Shepard Street, Morehead City, NC 28557 ANALYTE SAMPLE IDENTIFICATION Protection of Groundwater PSRG Residential PSRG hid/Comm PSRG B5 B6 I B7 I B8 I B9 B10 SAMPLE DEPTH (feetbgs) 0.5' - 0.75' 0.5' -0.75' 0.5' -0.75' 0.5' -0.75' 0.5' -0.75' 0.5' -0.75' Priority Pollutant Metals (mg/kg) Arsenic BDL BDL BDL BDL BDL BDL 5.8 0.68 3 Barium 11.2 8.89 2.95 5 2.3 8.33 580 3,100 47,000 Cadmium BDL BDL BDL BDL BDL BDL 3.0 14 200 Chromium, total 5.7 6.36 2.66 3.32 3.54 5.65 360,000 23,000 350,000 Chromium VI* BDL BDL BDL BDL BDL BDL 3.8 0.31 6.5 Lead 31.5 8.17 1.65 25.8 1.38 13 270 400 800 Mercury BDL 0.0815 BDL 0.0746 BDL 0.0496 1.0 2.3 9.7 Selenium BDL BDL BDL BDL BDL BDL 2.1 78 1,200 Silver BDL BDL BDL BDL BDL BDL 3.4 78 1,200 Note: Metals analysis via Method 6010D, 7471B * Hex Chrome via 7199 ATTACHMENT A ANALYTICAL REPORT ace Pace Analytical Services, LLC 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 August 07, 2023 Henry Nemargut Henry Nemargut Engineering 2211 Chestnut Street Wilmington, NC 28405 RE: Project: RESIDENCE @9TH-901 Pace Project No.: 92679695 Dear Henry Nemargut: Enclosed are the analytical results for sample(s) received by the laboratory on July 28, 2023. The results relate only to the samples included in this report. Results reported herein conform to the applicable TNI/NELAC Standards and the laboratory's Quality Manual, where applicable, unless otherwise noted in the body of the report. The test results provided in this final report were generated by each of the following laboratories within the Pace Network: • Pace National - Mt. Juliet If you have any questions concerning this report, please feel free to contact me. Sincerely, Bonnie Vang bonnie.vang@pacelabs.com (704)875-9092 Project Manager Enclosures REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, LLC. Page 1 of 21 Project: RESIDENCE @9TH-901 Pace Project No.: 92679695 Pace Analytical Services National 12065 Lebanon Road, Mt. Juliet, TN 37122 Alabama Certification #: 40660 Alaska Certification 17-026 Arizona Certification #: AZ0612 Arkansas Certification #: 88-0469 California Certification #: 2932 Canada Certification #: 1461.01 Colorado Certification #: TN00003 Connecticut Certification #: PH-0197 DOD Certification: #1461.01 EPA# TN00003 Florida Certification #: E87487 Georgia DW Certification #: 923 Georgia Certification: NELAP Idaho Certification #: TN00003 Illinois Certification #: 200008 Indiana Certification #: C-TN-01 Iowa Certification #: 364 Kansas Certification #: E-10277 Kentucky UST Certification #: 16 Kentucky Certification #: 90010 Louisiana Certification #: A130792 Louisiana DW Certification #: LA180010 Maine Certification #: TN0002 Maryland Certification #: 324 Massachusetts Certification #: M-TNO03 Michigan Certification #: 9958 Minnesota Certification #: 047-999-395 Mississippi Certification #: TN00003 Missouri Certification #: 340 Montana Certification #: CERT0086 Nebraska Certification #: NE-OS-15-05 CERTIFICATIONS Nevada Certification #: TN-03-2002-34 New Hampshire Certification #: 2975 New Jersey Certification #: TNO02 New Mexico DW Certification New York Certification #: 11742 North Carolina Aquatic Toxicity Certification #: 41 North Carolina Drinking Water Certification #: 21704 North Carolina Environmental Certificate #: 375 North Dakota Certification #: R-140 Ohio VAP Certification #: CL0069 Oklahoma Certification #: 9915 Oregon Certification #: TN200002 Pennsylvania Certification #: 68-02979 Rhode Island Certification #: LA000356 South Carolina Certification #: 84004 South Dakota Certification Tennessee DW/Chem/Micro Certification #: 2006 Texas Certification #: T 104704245-17-14 Texas Mold Certification #: LAB0152 USDA Soil Permit #: P330-15-00234 Utah Certification #: TN00003 Virginia Certification #: VT2006 Vermont Dept. of Health: ID# VT-2006 Virginia Certification #: 460132 Washington Certification #: C847 West Virginia Certification #: 233 Wisconsin Certification #: 998093910 Wyoming UST Certification #: via A21-A 2926.01 A21-A-ISO 17025 Certification #: 1461.01 A21-A-ISO 17025 Certification #: 1461.02 AIHA-LAP/LLC EMLAP Certification #:100789 REPORT OF LABORATORY ANALYSIS Pace Analytical Services, LLC 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, LLC. Page 2 of 21 SAMPLE SUMMARY Project: RESIDENCE @9TH-901 Pace Project No.: 92679695 Lab ID Sample ID Matrix Date Collected Date Received 92679695001 131 Solid 07/27/23 09:05 07/28/23 09:36 92679695002 132 Solid 07/27/23 09:15 07/28/23 09:36 92679695003 133 Solid 07/27/23 09:25 07/28/23 09:36 92679695004 134 Solid 07/27/23 09:30 07/28/23 09:36 REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, LLC. Pace Analytical Services, LLC 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 Page 3 of 21 SAMPLE ANALYTE COUNT Project: RESIDENCE @9TH-901 Pace Project No.: 92679695 Lab ID Sample ID Method 92679695001 131 92679695002 132 92679695003 133 92679695004 134 PAN = Pace National - Mt. Juliet Pace Analytical Services, LLC 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 Analytes Analysts Reported Laboratory EPA 6010D ZSA 7 PAN EPA 7471 B LAS 1 PAN SM 2540G CMK 1 PAN EPA 7199 SET 1 PAN EPA 6010D ZSA 7 PAN EPA 7471 B LAS 1 PAN SM 2540G CMK 1 PAN EPA 7199 SET 1 PAN EPA 6010D ZSA 7 PAN EPA 7471 B LAS 1 PAN SM 2540G CMK 1 PAN EPA 7199 SET 1 PAN EPA 6010D ZSA 7 PAN EPA 7471 B LAS 1 PAN SM 2540G CMK 1 PAN EPA 7199 SET 1 PAN REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, LLC. Page 4 of 21 Project: RESIDENCE @9TH-901 Pace Project No.: 92679695 Lab Sample ID Method Client Sample ID Parameters SUMMARY OF DETECTION Resu It Pace Analytical Services, LLC 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 Units Report Limit Analyzed Qualifiers 92679695001 B1 EPA 6010D Arsenic 5.78 mg/kg 2.33 08/03/23 11:00 EPA 6010D Barium 90.4 mg/kg 0.583 08/03/23 11:00 EPA 6010D Chromium 8.48 mg/kg 1.17 08/03/23 11:00 EPA 6010D Lead 29.3 mg/kg 0.583 08/03/23 11:00 EPA 7471 B Mercury 0.134 mg/kg 0.0466 08/04/23 10:38 SM 2540G Total Solids 78.7 % 08/01/23 09:58 SM 2540G Total Solids 85.8 % 08/02/23 07:13 92679695002 B2 EPA 6010D Barium 30.3 mg/kg 0.531 08/03/23 11:03 EPA 6010D Chromium 2.68 mg/kg 1.06 08/03/23 11:03 EPA 6010D Lead 43.3 mg/kg 0.531 08/03/23 11:03 EPA 7471 B Mercury 0.121 mg/kg 0.0425 08/04/23 10:46 SM 2540G Total Solids 82.7 % 08/01/23 09:58 SM 2540G Total Solids 94.1 % 08/02/23 07:13 92679695003 B3 EPA 6010D Barium 32.2 mg/kg 0.530 08/03/23 11:06 EPA 6010D Chromium 3.01 mg/kg 1.06 08/03/23 11:06 EPA 6010D Lead 38.7 mg/kg 0.530 08/03/23 11:06 EPA 7471 B Mercury 0.117 mg/kg 0.0424 08/04/23 10:48 SM 2540G Total Solids 85.7 % 08/01/23 09:58 SM 2540G Total Solids 94.3 % 08/02/23 07:13 92679695004 B4 EPA 6010D Barium 15.6 mg/kg 0.703 08/03/23 11:08 EPA 6010D Chromium 5.61 mg/kg 1.41 08/03/23 11:08 EPA 6010D Lead 77.3 mg/kg 0.703 08/03/23 11:08 EPA 7471 B Mercury 0.126 mg/kg 0.0563 08/04/23 10:51 SM 2540G Total Solids 74.6 % 08/01/23 09:36 SM 2540G Total Solids 71.1 % 08/02/23 06:46 REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, LLC. Page 5 of 21 ANALYTICAL RESULTS Project: RESIDENCE @9TH-901 Pace Project No.: 92679695 Pace Analytical Services, LLC 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 Sample: 131 Lab ID: 92679695001 Collected: 07/27/23 09:05 Received: 07/28/23 09:36 Matrix: Solid Results reported on a "dry weight" basis and are adjusted for percent moisture, sample size and any dilutions. Parameters Results Units Report Limit DF Prepared Analyzed CAS No. Qual Metals (ICP) 6010D Analytical Method: EPA 6010D Preparation Method: 3050B Pace National - Mt. Juliet Arsenic 5.78 mg/kg 2.33 1 08/02/23 08:11 08/03/23 11:00 7440-38-2 Barium 90.4 mg/kg 0.583 1 08/02/23 08:11 08/03/23 11:00 7440-39-3 Cadmium ND mg/kg 0.583 1 08/02/23 08:11 08/03/23 11:00 7440-43-9 Chromium 8.48 mg/kg 1.17 1 08/02/23 08:11 08/03/23 11:00 7440-47-3 Lead 29.3 mg/kg 0.583 1 08/02/23 08:11 08/03/23 11:00 7439-92-1 Selenium ND mg/kg 2.33 1 08/02/23 08:11 08/03/23 11:00 7782-49-2 Silver ND mg/kg 1.17 1 08/02/23 08:11 08/03/23 11:00 7440-22-4 Mercury 7471 B Analytical Method: EPA 7471 B Preparation Method: 7471 A Pace National - Mt. Juliet Mercury 0.134 mg/kg 0.0466 1 08/03/2312:00 08/04/2310:38 7439-97-6 Total Solids 2540 G-2011 Analytical Method: SM 2540G Preparation Method: SM 2540 G Pace National - Mt. Juliet Total Solids 78.7 % 1 08/01 /23 09:44 08/01 /23 09:58 Total Solids 85.8 % 1 08/02/23 07:05 08/02/23 07:13 Wet Chemistry 7199 Analytical Method: EPA 7199 Preparation Method: 3060A Pace National - Mt. Juliet Chromium, Hexavalent ND mg/kg 1.27 1 08/01/23 17:52 08/02/23 10:49 18540-29-9 Date: 08/07/2023 08:47 AM REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, LLC. Page 6 of 21 ANALYTICAL RESULTS Project: RESIDENCE @9TH-901 Pace Project No.: 92679695 Pace Analytical Services, LLC 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 Sample: 132 Lab ID: 92679695002 Collected: 07/27/23 09:15 Received: 07/28/23 09:36 Matrix: Solid Results reported on a "dry weight" basis and are adjusted for percent moisture, sample size and any dilutions. Parameters Results Units Report Limit DF Prepared Analyzed CAS No. Qual Metals (ICP) 6010D Analytical Method: EPA 6010D Preparation Method: 3050B Pace National - Mt. Juliet Arsenic ND mg/kg 2.13 1 08/02/23 08:11 08/03/23 11:03 7440-38-2 Barium 30.3 mg/kg 0.531 1 08/02/23 08:11 08/03/23 11:03 7440-39-3 Cadmium ND mg/kg 0.531 1 08/02/23 08:11 08/03/23 11:03 7440-43-9 Chromium 2.68 mg/kg 1.06 1 08/02/23 08:11 08/03/23 11:03 7440-47-3 Lead 43.3 mg/kg 0.531 1 08/02/23 08:11 08/03/23 11:03 7439-92-1 Selenium ND mg/kg 2.13 1 08/02/23 08:11 08/03/23 11:03 7782-49-2 Silver ND mg/kg 1.06 1 08/02/23 08:11 08/03/23 11:03 7440-22-4 Mercury 7471 B Analytical Method: EPA 7471 B Preparation Method: 7471 A Pace National - Mt. Juliet Mercury 0.121 mg/kg 0.0425 1 08/03/2312:00 08/04/2310:46 7439-97-6 Total Solids 2540 G-2011 Analytical Method: SM 2540G Preparation Method: SM 2540 G Pace National - Mt. Juliet Total Solids 82.7 % 1 08/01 /23 09:44 08/01 /23 09:58 Total Solids 94.1 % 1 08/02/23 07:05 08/02/23 07:13 Wet Chemistry 7199 Analytical Method: EPA 7199 Preparation Method: 3060A Pace National - Mt. Juliet Chromium, Hexavalent ND mg/kg 1.21 1 08/01/23 17:52 08/02/23 10:54 18540-29-9 Date: 08/07/2023 08:47 AM REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, LLC. Page 7 of 21 ANALYTICAL RESULTS Project: RESIDENCE @9TH-901 Pace Project No.: 92679695 Pace Analytical Services, LLC 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 Sample: 133 Lab ID: 92679695003 Collected: 07/27/23 09:25 Received: 07/28/23 09:36 Matrix: Solid Results reported on a "dry weight" basis and are adjusted for percent moisture, sample size and any dilutions. Parameters Results Units Report Limit DF Prepared Analyzed CAS No. Qual Metals (ICP) 6010D Analytical Method: EPA 6010D Preparation Method: 3050B Pace National - Mt. Juliet Arsenic ND mg/kg 2.12 1 08/02/23 08:11 08/03/23 11:06 7440-38-2 Barium 32.2 mg/kg 0.530 1 08/02/23 08:11 08/03/23 11:06 7440-39-3 Cadmium ND mg/kg 0.530 1 08/02/23 08:11 08/03/23 11:06 7440-43-9 Chromium 3.01 mg/kg 1.06 1 08/02/23 08:11 08/03/23 11:06 7440-47-3 Lead 38.7 mg/kg 0.530 1 08/02/23 08:11 08/03/23 11:06 7439-92-1 Selenium ND mg/kg 2.12 1 08/02/23 08:11 08/03/23 11:06 7782-49-2 Silver ND mg/kg 1.06 1 08/02/23 08:11 08/03/23 11:06 7440-22-4 Mercury 7471 B Analytical Method: EPA 7471 B Preparation Method: 7471 A Pace National - Mt. Juliet Mercury 0.117 mg/kg 0.0424 1 08/03/2312:00 08/04/2310:48 7439-97-6 Total Solids 2540 G-2011 Analytical Method: SM 2540G Preparation Method: SM 2540 G Pace National - Mt. Juliet Total Solids 85.7 % 1 08/01 /23 09:44 08/01 /23 09:58 Total Solids 94.3 % 1 08/02/23 07:05 08/02/23 07:13 Wet Chemistry 7199 Analytical Method: EPA 7199 Preparation Method: 3060A Pace National - Mt. Juliet Chromium, Hexavalent ND mg/kg 1.17 1 08/01/23 17:52 08/02/23 11:20 18540-29-9 Date: 08/07/2023 08:47 AM REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, LLC. Page 8 of 21 ANALYTICAL RESULTS Project: RESIDENCE @9TH-901 Pace Project No.: 92679695 Pace Analytical Services, LLC 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 Sample: 134 Lab ID: 92679695004 Collected: 07/27/23 09:30 Received: 07/28/23 09:36 Matrix: Solid Results reported on a "dry weight" basis and are adjusted for percent moisture, sample size and any dilutions. Parameters Results Units Report Limit DF Prepared Analyzed CAS No. Qual Metals (ICP) 6010D Analytical Method: EPA 6010D Preparation Method: 3050B Pace National - Mt. Juliet Arsenic ND mg/kg 2.81 1 08/02/23 08:11 08/03/23 11:08 7440-38-2 Barium 15.6 mg/kg 0.703 1 08/02/23 08:11 08/03/23 11:08 7440-39-3 Cadmium ND mg/kg 0.703 1 08/02/23 08:11 08/03/23 11:08 7440-43-9 Chromium 5.61 mg/kg 1.41 1 08/02/23 08:11 08/03/23 11:08 7440-47-3 Lead 77.3 mg/kg 0.703 1 08/02/23 08:11 08/03/23 11:08 7439-92-1 Selenium ND mg/kg 2.81 1 08/02/23 08:11 08/03/23 11:08 7782-49-2 Silver ND mg/kg 1.41 1 08/02/23 08:11 08/03/23 11:08 7440-22-4 Mercury 7471 B Analytical Method: EPA 7471 B Preparation Method: 7471 A Pace National - Mt. Juliet Mercury 0.126 mg/kg 0.0563 1 08/03/2312:00 08/04/2310:51 7439-97-6 Total Solids 2540 G-2011 Analytical Method: SM 2540G Preparation Method: SM 2540 G Pace National - Mt. Juliet Total Solids 74.6 % 1 08/01 /23 09:24 08/01 /23 09:36 Total Solids 71.1 % 1 08/02/23 06:39 08/02/23 06:46 Wet Chemistry 7199 Analytical Method: EPA 7199 Preparation Method: 3060A Pace National - Mt. Juliet Chromium, Hexavalent ND mg/kg 1.34 1 08/01/23 17:52 08/02/23 11:26 18540-29-9 Date: 08/07/2023 08:47 AM REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, LLC. Page 9 of 21 QUALITY CONTROL DATA Project: RESIDENCE @9TH-901 Pace Project No.: 92679695 QC Batch: 2106131 Analysis Method: EPA 601 OD QC Batch Method: 3050B Analysis Description: Metals (ICP) 601OD Laboratory: Pace National - Mt. Juliet Associated Lab Samples: 92679695001, 92679695002, 92679695003, 92679695004 METHOD BLANK: R3956451-1 Matrix: Solid Associated Lab Samples: 92679695001, 92679695002, 92679695003, 92679695004 Blank Reporting Parameter Units Result Limit Analyzed Arsenic mg/kg ND 2.00 08/03/23 10:08 Barium mg/kg ND 0.500 08/03/23 10:08 Cadmium mg/kg ND 0.500 08/03/23 10:08 Chromium mg/kg ND 1.00 08/03/23 10:08 Lead mg/kg ND 0.500 08/03/23 10:08 Selenium mg/kg ND 2.00 08/03/23 10:08 Silver mg/kg ND 1.00 08/03/23 10:08 LABORATORY CONTROL SAMPLE: R3956451-2 Parameter Units Spike LCS LCS % Rec Conc. Result % Rec Limits Arsenic mg/kg 100 99.4 99.4 80.0-120 Barium mg/kg 100 101 101 80.0-120 Cadmium mg/kg 100 96.4 96.4 80.0-120 Chromium mg/kg 100 96.6 96.6 80.0-120 Lead mg/kg 100 95.8 95.8 80.0-120 Selenium mg/kg 100 95.1 95.1 80.0-120 Silver mg/kg 20.0 18.8 94.1 80.0-120 MATRIX SPIKE & MATRIX SPIKE DUPLICATE: R3956451-5 MS MSD L1640456-11 Spike Spike Parameter Units Resu It Conc. Conc. Arsenic mg/kg 2.90 100 100 Barium mg/kg 92.9 100 100 Cadmium mg/kg 0.547 100 100 Chromium mg/kg 5.97 100 100 Lead mg/kg 0.358 100 100 Selenium mg/kg ND 100 100 Silver mg/kg ND 20.0 20.0 Pace Analytical Services, LLC 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 Qualifiers R3956451-6 MS MSD MS MSD % Rec Max Result Result % Rec % Rec Limits RPD RPD Qual 122 116 119 113 75.0-125 4.85 20 204 171 111 77.6 75.0-125 17.8 20 114 110 113 109 75.0-125 3.72 20 104 100 98.0 94.2 75.0-125 3.72 20 106 102 106 102 75.0-125 3.61 20 112 108 112 108 75.0-125 3.58 20 22.9 22.2 115 111 75.0-125 3.25 20 Results presented on this page are in the units indicated by the "Units" column except where an alternate unit is presented to the right of the result. REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, Date: 08/07/2023 08:47 AM without the written consent of Pace Analytical Services, LLC. Page 10 of 21 Pace Analytical Services, LLC 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 QUALITY CONTROL DATA Project: RESIDENCE @9TH-901 Pace Project No.: 92679695 QC Batch: 2106853 Analysis Method: EPA 7471 B QC Batch Method: 7471 A Analysis Description: Mercury 7471 B Laboratory: Pace National - Mt. Juliet Associated Lab Samples: 92679695001, 92679695002, 92679695003, 92679695004 METHOD BLANK: R3956848-1 Matrix: Solid Associated Lab Samples: 92679695001, 92679695002, 92679695003, 92679695004 Blank Reporting Parameter Units Result Limit Analyzed Qualifiers Mercury mg/kg ND 0.0400 08/04/2310:00 LABORATORY CONTROL SAMPLE: R3956848-2 Spike LCS LCS % Rec Parameter Units Conc. Result % Rec Limits Qualifiers Mercury mg/kg 0.500 0.483 96.6 80.0-120 MATRIX SPIKE & MATRIX SPIKE DUPLICATE: R3956848-3 R3956848-4 MS MSD L1640162-03 Spike Spike MS MSD MS MSD % Rec Max Parameter Units Result Conc. Conc. Result Result % Rec % Rec Limits RPD RPD Qual Mercury mg/kg ND 0.591 0.591 0.536 0.535 90.8 90.5 75.0-125 0.322 20 Results presented on this page are in the units indicated by the "Units" column except where an alternate unit is presented to the right of the result. REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, Date: 08/07/2023 08:47 AM without the written consent of Pace Analytical Services, LLC. Page 11 of 21 Pace Analytical Services, LLC 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 QUALITY CONTROL DATA Project: RESIDENCE @9TH-901 Pace Project No.: 92679695 QC Batch: 2104638 Analysis Method: SM 2540G QC Batch Method: SM 2540 G Analysis Description: Total Solids 2540 G-2011 Laboratory: Pace National - Mt. Juliet Associated Lab Samples: 92679695001, 92679695002, 92679695003 METHOD BLANK: R3955380-1 Matrix: Solid Associated Lab Samples: 92679695001, 92679695002, 92679695003 Blank Reporting Parameter Units Result Limit Analyzed Qualifiers Total Solids % 0.00300 08/01/23 09:58 LABORATORY CONTROL SAMPLE: R3955380-2 Spike LCS LCS % Rec Parameter Units Conc. Result % Rec Limits Qualifiers Total Solids % 50.0 50.0 100 85.0-115 SAMPLE DUPLICATE: R3955380-3 L1640147-10 Dup Max Parameter Units Result Result RPD RPD Qualifiers Total Solids % 72.7 74.5 2.47 10 Results presented on this page are in the units indicated by the "Units" column except where an alternate unit is presented to the right of the result. REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, Date: 08/07/2023 08:47 AM without the written consent of Pace Analytical Services, LLC. Page 12 of 21 Pace Analytical Services, LLC 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 QUALITY CONTROL DATA Project: RESIDENCE @9TH-901 Pace Project No.: 92679695 QC Batch: 2104652 Analysis Method: SM 2540G QC Batch Method: SM 2540 G Analysis Description: Total Solids 2540 G-2011 Laboratory: Pace National - Mt. Juliet Associated Lab Samples: 92679695004 METHOD BLANK: R3955572-1 Associated Lab Samples: 92679695004 Parameter Units Matrix: Solid Blank Reporting Analyzed Qualifiers Total Solids % 0.00100 08/01/23 09:36 LABORATORY CONTROL SAMPLE: R3955572-2 Spike LCS LCS % Rec Parameter Units Conc. Result % Rec Limits Qualifiers Total Solids % 50.0 50.0 100 85.0-115 SAMPLE DUPLICATE: R3955572-3 L1640162-03 Dup Max Parameter Units Result Result RPD RPD Qualifiers Total Solids % 84.6 83.8 0.999 10 Results presented on this page are in the units indicated by the "Units" column except where an alternate unit is presented to the right of the result. REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, Date: 08/07/2023 08:47 AM without the written consent of Pace Analytical Services, LLC. Page 13 of 21 Pace Analytical Services, LLC 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 QUALITY CONTROL DATA Project: RESIDENCE @9TH-901 Pace Project No.: 92679695 QC Batch: 2106051 Analysis Method: SM 2540G QC Batch Method: SM 2540 G Analysis Description: Total Solids 2540 G-2011 Laboratory: Pace National - Mt. Juliet Associated Lab Samples: 92679695001, 92679695002, 92679695003 METHOD BLANK: R3955924-1 Matrix: Solid Associated Lab Samples: 92679695001, 92679695002, 92679695003 Blank Reporting Parameter Units Result Limit Analyzed Qualifiers Total Solids % 0.00300 08/02/23 07:13 LABORATORY CONTROL SAMPLE: R3955924-2 Spike LCS LCS % Rec Parameter Units Conc. Result % Rec Limits Qualifiers Total Solids % 50.0 50.0 100 85.0-115 SAMPLE DUPLICATE: R3955924-3 L1641087-01 Dup Max Parameter Units Result Result RPD RPD Qualifiers Total Solids % 81.5 82.2 0.848 10 Results presented on this page are in the units indicated by the "Units" column except where an alternate unit is presented to the right of the result. REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, Date: 08/07/2023 08:47 AM without the written consent of Pace Analytical Services, LLC. Page 14 of 21 Pace Analytical Services, LLC 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 QUALITY CONTROL DATA Project: RESIDENCE @9TH-901 Pace Project No.: 92679695 QC Batch: 2106052 Analysis Method: SM 2540G QC Batch Method: SM 2540 G Analysis Description: Total Solids 2540 G-2011 Laboratory: Pace National - Mt. Juliet Associated Lab Samples: 92679695004 METHOD BLANK: R3955920-1 Associated Lab Samples: 92679695004 Parameter Units Matrix: Solid Blank Reporting Analyzed Qualifiers Total Solids % 0.00200 08/02/23 06:46 LABORATORY CONTROL SAMPLE: R3955920-2 Spike LCS LCS % Rec Parameter Units Conc. Result % Rec Limits Qualifiers Total Solids % 50.0 50.0 100 85.0-115 SAMPLE DUPLICATE: R3955920-3 L1640467-02 Dup Max Parameter Units Result Result RPD RPD Qualifiers Total Solids % 78.3 77.9 0.564 10 Results presented on this page are in the units indicated by the "Units" column except where an alternate unit is presented to the right of the result. REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, Date: 08/07/2023 08:47 AM without the written consent of Pace Analytical Services, LLC. Page 15 of 21 QUALITY CONTROL DATA Project: RESIDENCE @9TH-901 Pace Project No.: 92679695 QC Batch: 2104471 Analysis Method: EPA 7199 QC Batch Method: 3060A Analysis Description: Wet Chemistry 7199 Laboratory: Pace National - Mt. Juliet Associated Lab Samples: 92679695001, 92679695002, 92679695003, 92679695004 METHOD BLANK: R3955974-1 Matrix: Solid Associated Lab Samples: 92679695001, 92679695002, 92679695003, 92679695004 Blank Reporting Parameter Units Result Limit Analyzed Qualifiers Chromium, Hexavalent mg/kg ND 1.00 08/02/23 10:37 LABORATORY CONTROL SAMPLE: R3955974-2 Parameter Units Chromium, Hexavalent Pace Analytical Services, LLC 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 Spike LCS LCS % Rec Conc. Result % Rec Limits Qualifiers mg/kg 10.0 10.9 109 80.0-120 MATRIX SPIKE & MATRIX SPIKE DUPLICATE: R3955974-3 R3955974-4 MS MSD 92679695002 Spike Spike MS MSD MS MSD % Rec Max Parameter Units Result Conc. Conc. Result Result % Rec % Rec Limits RPD RPD Qual Chromium, Hexavalent mg/kg 0.393 24.2 24.2 26.2 25.6 107 104 75.0-125 2.35 20 MATRIX SPIKE SAMPLE: R3955974-5 92679695002 Spike MS MS % Rec Parameter Units Result Conc. Result % Rec Limits Qualifiers Chromium, Hexavalent mg/kg 0.393 777 680 87.5 75.0-125 SAMPLE DUPLICATE: R3955974-7 92679695004 Dup Max Parameter Units Result Result RPD RPD Qualifiers Chromium, Hexavalent mg/kg ND ND 0.00 20 SAMPLE DUPLICATE: R3955974-8 L1640179-04 Dup Max Parameter Units Result Result RPD RPD Qualifiers Chromium, Hexavalent mg/kg 0.559 ND 5.94 20 Results presented on this page are in the units indicated by the "Units" column except where an alternate unit is presented to the right of the result. REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, Date: 08/07/2023 08:47 AM without the written consent of Pace Analytical Services, LLC. Page 16 of 21 Pace Analytical Services, LLC 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 QUALIFIERS Project: RESIDENCE @9TH-901 Pace Project No.: 92679695 DEFINITIONS DF - Dilution Factor, if reported, represents the factor applied to the reported data due to dilution of the sample aliquot. ND - Not Detected at or above adjusted reporting limit. TNTC - Too Numerous To Count J - Estimated concentration above the adjusted method detection limit and below the adjusted reporting limit. MDL -Adjusted Method Detection Limit. PQL - Practical Quantitation Limit. RL - Reporting Limit - The lowest concentration value that meets project requirements for quantitative data with known precision and bias for a specific analyte in a specific matrix. S - Surrogate 1,2-Diphenylhydrazine decomposes to and cannot be separated from Azobenzene using Method 8270. The result for each analyte is a combined concentration. Consistent with EPA guidelines, unrounded data are displayed and have been used to calculate % recovery and RPD values. LCS(D) - Laboratory Control Sample (Duplicate) MS(D) - Matrix Spike (Duplicate) DUP - Sample Duplicate RPD - Relative Percent Difference NC - Not Calculable. SG - Silica Gel - Clean -Up U - Indicates the compound was analyzed for, but not detected. Acid preservation may not be appropriate for 2 Chloroethylvinyl ether. A separate vial preserved to a pH of 4-5 is recommended in SW846 Chapter 4 for the analysis of Acrolein and Acrylonitrile by EPA Method 8260. N-Nitrosodiphenylamine decomposes and cannot be separated from Diphenylamine using Method 8270. The result reported for each analyte is a combined concentration. Reported results are not rounded until the final step prior to reporting. Therefore, calculated parameters that are typically reported as "Total" may vary slightly from the sum of the reported component parameters. Pace Analytical is TN accredited. Contact your Pace PM for the current list of accredited analytes. TNI - The N E LAC Institute. REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, Date: 08/07/2023 08:47 AM without the written consent of Pace Analytical Services, LLC. Page 17 of 21 Pace Analytical Services, LLC 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 QUALITY CONTROL DATA CROSS REFERENCE TABLE Project: Pace Project No.: RESIDENCE @9TH-901 92679695 Analytical Lab ID Sample ID QC Batch Method QC Batch Analytical Method Batch 92679695001 B1 3050B 2106131 EPA 6010 D 2106131 92679695002 B2 3050B 2106131 EPA 6010D 2106131 92679695003 B3 3050B 2106131 EPA 6010D 2106131 92679695004 B4 3050B 2106131 EPA 6010 D 2106131 92679695001 B1 7471A 2106853 EPA 7471 B 2106853 92679695002 B2 7471A 2106853 EPA 7471 B 2106853 92679695003 B3 7471A 2106853 EPA 7471 B 2106853 92679695004 B4 7471A 2106853 EPA 7471 B 2106853 92679695001 B1 SM 2540 G 2104638 SM 2540G 2104638 92679695001 B1 SM 2540 G 2106051 SM 2540G 2106051 92679695002 B2 SM 2540 G 2104638 SM 2540G 2104638 92679695002 B2 SM 2540 G 2106051 SM 2540G 2106051 92679695003 B3 SM 2540 G 2104638 SM 2540G 2104638 92679695003 B3 SM 2540 G 2106051 SM 2540G 2106051 92679695004 B4 SM 2540 G 2104652 SM 2540G 2104652 92679695004 B4 SM 2540 G 2106052 SM 2540G 2106052 92679695001 B1 3060A 2104471 EPA 7199 2104471 92679695002 B2 3060A 2104471 EPA 7199 2104471 92679695003 B3 3060A 2104471 EPA 7199 2104471 92679695004 B4 3060A 2104471 EPA 7199 2104471 Date: 08/07/2023 08:47 AM REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, LLC. Page 18 of 21 U O O a Q zz Z zz Zzz% zz z L \ N �iMHA�.4 TN N'31 N N N u`l , p )ll n O C U d m ij n = 1 0 W u u y m E r •w MW aW+ 1 d n u a u~ N a •• v ou na°i Im - w n v nE E y E d` w0 a E O m a duo v ao v '� ..� W U d w 7 N N •EO H giorr 0 an d y y D '•1 a Y V V Y C Y d .i D U D •-I H d C N p, m d N c Vf im 0..�m 0oo u v •• n E m `m _m` E w z .i c.�mY>O aY x•+ u W v Nik m b• N Y Y U N m F 4 N Y H . E woo o E 9u 9 '•�jo d E N dd tl O N d D .i C U .. .. 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Y m n M N W 8 a O pp.�•1N gryN w q 2y iu '] a a :I u m$ m tl O N 9 m .i q S .'J b a 1 A V UU G1UNNp^JN C.UN dN.l .: q (� cc o c Z u amt a ro 0 LU 0 r s a 00 L.0 d rco TM �ncjIlk 1 F 0 J \t n E m u `o u tt u v w w E o �S ,—NO oZ $ X Gi 01 mE m b Z g Z O v y E n n c +' m o o= S m = .m• off` V` $ E — E E � « u Pi C!• °i F� m �n ryry m m> M N �i i •• a a u u p E Q c E LLq v o 0 0 LL m � : C 'V U 4 d m E m U lJ \{ y J o E N o c S9 v E n m _ g2 m .. vmi ` 1 ✓ m` T d q O 6 N K W m W n of N d C r E o Bi - m Gtz m a c E E 5 3 a z u a w u u ¢ rc Z Jo Z 96ed V1969 al xeillenp 'slawejuO1 llallooui'dwal to IIlO'3AiteAlas3/d llauOoul'plo4lo ln0 'a'i) e31110 uopel4nla3 VN30 eupole3 41UON a410l luas ap ]I'm w1o1 swl to Ado) a 'saidwes asueudwoo ewm,ei uvou ................ ..._— x 101 pappe aAge+uasard 10 lunowy palsnfpe uaileluasald awii palsnfpe uopemasald wa ldlaaa. uodn Hd anllenlaswd;o adAi 0l aldweg saldweS paAJasaJd Jo} 901 luaw;snfpy Hd zT zT Tr OI 6 8 L 9 5 _ 1 D L £ V z V T m C O 3 c C 2Or y D m m 4 O 3 O C O 3 y m s O 3 d O W N O 3 m iF 9 D N N y N 3 n 9 D N < n' x < N n •-• u 2 x V C O 3 °' C m \ p fl m < O D v D < 11 1p L O 3 D ] n 2 3:N G 41 N � O D d 2 ➢ O m .p 2 0 3 D Q D o G1 m A O 3 3 p Z = D D 0dl W N O 3 3 Op D G m c S n D L1 W C N o 3 ➢ m m D a Y S Y p 3 S NR. D Y C N 1 3 n 'a < Ca m o A C m m Y Nn 3 w a v m N Y 3 w a ➢ n O m � o 3 a u Z z n m N Y rN+' 3 day y n m M C Y a ^ D u z D m N C VI o 3 e N C 9 2 Z m W C o 3 o N C 9 m 2. m p C u v N C L A z a ew8NAjuaH—Z6 :1N3I13 EZ/b0/�0—'a}ep ano auu0143J01SDIU fN paniasaidunFie lha4:4.. saploq;o 3agwnu;sll of sl xoq;o;ley w01108.a HH11'300 Ualeml STos/ova'asealg pue 1!0.30y'w1a111O3'V0A suolld95x3 VO4J. _ zzoZ/bI/ZT mea enpa;;3 '-F%g&B4 of. 21 ldlaoab uodH u01;!pu00 alduleS Z0A E900-MnH-W2l3-AN3 :811!1 #Oa C1 ace Pace Analytical Services, LLC 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 August 07, 2023 Henry Nemargut Henry Nemargut Engineering 2211 Chestnut Street Wilmington, NC 28405 RE: Project: RESIDENCE @9TH-909 Pace Project No.: 92679694 Dear Henry Nemargut: Enclosed are the analytical results for sample(s) received by the laboratory on July 28, 2023. The results relate only to the samples included in this report. Results reported herein conform to the applicable TNI/NELAC Standards and the laboratory's Quality Manual, where applicable, unless otherwise noted in the body of the report. The test results provided in this final report were generated by each of the following laboratories within the Pace Network: • Pace National - Mt. Juliet If you have any questions concerning this report, please feel free to contact me. Sincerely, Bonnie Vang bonnie.vang@pacelabs.com (704)875-9092 Project Manager Enclosures REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, LLC. Page 1 of 22 Project: RESIDENCE @9TH-909 Pace Project No.: 92679694 Pace Analytical Services National 12065 Lebanon Road, Mt. Juliet, TN 37122 Alabama Certification #: 40660 Alaska Certification 17-026 Arizona Certification #: AZ0612 Arkansas Certification #: 88-0469 California Certification #: 2932 Canada Certification #: 1461.01 Colorado Certification #: TN00003 Connecticut Certification #: PH-0197 DOD Certification: #1461.01 EPA# TN00003 Florida Certification #: E87487 Georgia DW Certification #: 923 Georgia Certification: NELAP Idaho Certification #: TN00003 Illinois Certification #: 200008 Indiana Certification #: C-TN-01 Iowa Certification #: 364 Kansas Certification #: E-10277 Kentucky UST Certification #: 16 Kentucky Certification #: 90010 Louisiana Certification #: A130792 Louisiana DW Certification #: LA180010 Maine Certification #: TN0002 Maryland Certification #: 324 Massachusetts Certification #: M-TNO03 Michigan Certification #: 9958 Minnesota Certification #: 047-999-395 Mississippi Certification #: TN00003 Missouri Certification #: 340 Montana Certification #: CERT0086 Nebraska Certification #: NE-OS-15-05 CERTIFICATIONS Nevada Certification #: TN-03-2002-34 New Hampshire Certification #: 2975 New Jersey Certification #: TNO02 New Mexico DW Certification New York Certification #: 11742 North Carolina Aquatic Toxicity Certification #: 41 North Carolina Drinking Water Certification #: 21704 North Carolina Environmental Certificate #: 375 North Dakota Certification #: R-140 Ohio VAP Certification #: CL0069 Oklahoma Certification #: 9915 Oregon Certification #: TN200002 Pennsylvania Certification #: 68-02979 Rhode Island Certification #: LA000356 South Carolina Certification #: 84004 South Dakota Certification Tennessee DW/Chem/Micro Certification #: 2006 Texas Certification #: T 104704245-17-14 Texas Mold Certification #: LAB0152 USDA Soil Permit #: P330-15-00234 Utah Certification #: TN00003 Virginia Certification #: VT2006 Vermont Dept. of Health: ID# VT-2006 Virginia Certification #: 460132 Washington Certification #: C847 West Virginia Certification #: 233 Wisconsin Certification #: 998093910 Wyoming UST Certification #: via A21-A 2926.01 A21-A-ISO 17025 Certification #: 1461.01 A21-A-ISO 17025 Certification #: 1461.02 AIHA-LAP/LLC EMLAP Certification #:100789 REPORT OF LABORATORY ANALYSIS Pace Analytical Services, LLC 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, LLC. Page 2 of 22 SAMPLE SUMMARY Project: RESIDENCE @9TH-909 Pace Project No.: 92679694 Lab ID Sample ID Matrix Date Collected Date Received 92679694001 135 Solid 07/27/23 09:45 07/28/23 09:36 92679694002 136 Solid 07/27/23 09:55 07/28/23 09:36 92679694003 137 Solid 07/27/23 10:10 07/28/23 09:36 92679694004 138 Solid 07/27/23 10:25 07/28/23 09:36 92679694005 139 Solid 07/27/23 10:45 07/28/23 09:36 92679694006 B10 Solid 07/27/23 11:05 07/28/23 09:36 REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, LLC. Pace Analytical Services, LLC 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 Page 3 of 22 Pace Analytical Services, LLC 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 SAMPLE ANALYTE COUNT Project: Pace Project No.: RESIDENCE @9TH-909 92679694 Analytes Lab ID Sample ID Method Analysts Reported Laboratory 92679694001 135 EPA 6010 D ZSA 7 PAN EPA 7471 B LAS 1 PAN SM 2540G CMK 1 PAN EPA 7199 SET 1 PAN 92679694002 136 EPA 6010 D ZSA 7 PAN EPA 7471 B LAS 1 PAN SM 2540G CMK 1 PAN EPA 7199 SET 1 PAN 92679694003 137 EPA 6010 D ZSA 7 PAN EPA 7471 B LAS 1 PAN SM 2540G CMK 1 PAN EPA 7199 SET 1 PAN 92679694004 138 EPA 6010 D ZSA 7 PAN EPA 7471 B LAS 1 PAN SM 2540G CMK 1 PAN EPA 7199 SET 1 PAN 92679694005 139 EPA 6010 D ZSA 7 PAN EPA 7471 B LAS 1 PAN SM 2540G CMK 1 PAN EPA 7199 SET 1 PAN 92679694006 B 10 EPA 6010 D ZSA 7 PAN EPA 7471 B LAS 1 PAN SM 2540G CMK 1 PAN EPA 7199 SET 1 PAN PAN = Pace National - Mt. Juliet REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, LLC. Page 4 of 22 Project: RESIDENCE @9TH-909 Pace Project No.: 92679694 Lab Sample ID Method Client Sample ID Parameters SUMMARY OF DETECTION Resu It Pace Analytical Services, LLC 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 Units Report Limit Analyzed Qualifiers 92679694001 B5 EPA 6010 D Barium 11.2 mg/kg 0.865 08/03/23 11:16 EPA 6010D Chromium 5.70 mg/kg 1.73 08/03/23 11:16 EPA 6010D Lead 31.5 mg/kg 0.865 08/03/23 11:16 SM 2540G Total Solids 79.5 % 08/01/23 09:36 SM 2540G Total Solids 57.8 % 08/02/23 06:46 92679694002 B6 EPA 6010D Barium 8.89 mg/kg 0.623 08/03/23 11:19 EPA 6010D Chromium 6.36 mg/kg 1.25 08/03/23 11:19 EPA 6010D Lead 8.17 mg/kg 0.623 08/03/23 11:19 EPA 7471 B Mercury 0.0815 mg/kg 0.0498 08/04/23 10:55 SM 2540G Total Solids 83.4 % 08/01/23 09:36 SM 2540G Total Solids 80.3 % 08/02/23 06:46 92679694003 B7 EPA 6010 D Barium 2.95 mg/kg 0.641 08/03/23 11:22 EPA 6010D Chromium 2.66 mg/kg 1.28 08/03/23 11:22 EPA 6010D Lead 1.65 mg/kg 0.641 08/03/23 11:22 SM 2540G Total Solids 84.6 % 08/01/23 09:36 SM 2540G Total Solids 78.0 % 08/02/23 06:46 92679694004 B8 EPA 6010D Barium 5.00 mg/kg 0.623 08/03/23 11:24 EPA 6010D Chromium 3.32 mg/kg 1.25 08/03/23 11:24 EPA 6010D Lead 25.8 mg/kg 0.623 08/03/23 11:24 EPA 7471 B Mercury 0.0746 mg/kg 0.0499 08/04/23 11:00 SM 2540G Total Solids 81.6 % 08/01/23 09:36 SM 2540G Total Solids 80.2 % 08/02/23 06:46 92679694005 B9 EPA 6010D Barium 2.30 mg/kg 0.627 08/03/23 11:27 EPA 6010D Chromium 3.54 mg/kg 1.25 08/03/23 11:27 EPA 6010D Lead 1.38 mg/kg 0.627 08/03/23 11:27 SM 2540G Total Solids 80.5 % 08/01/23 09:36 SM 2540G Total Solids 79.7 % 08/02/23 06:46 92679694006 B10 EPA 6010 D Barium 8.33 mg/kg 0.618 08/03/23 11:30 EPA 6010D Chromium 5.65 mg/kg 1.24 08/03/23 11:30 EPA 6010D Lead 13.0 mg/kg 0.618 08/03/23 11:30 EPA 7471 B Mercury 0.0496 mg/kg 0.0494 08/04/23 11:05 SM 2540G Total Solids 82.1 % 08/01/23 09:36 SM 2540G Total Solids 80.9 % 08/02/23 06:46 REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, LLC. Page 5 of 22 ANALYTICAL RESULTS Project: RESIDENCE @9TH-909 Pace Project No.: 92679694 Pace Analytical Services, LLC 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 Sample: 135 Lab ID: 92679694001 Collected: 07/27/23 09:45 Received: 07/28/23 09:36 Matrix: Solid Results reported on a "dry weight" basis and are adjusted for percent moisture, sample size and any dilutions. Parameters Results Units Report Limit DF Prepared Analyzed CAS No. Qual Metals (ICP) 6010D Analytical Method: EPA 6010D Preparation Method: 3050B Pace National - Mt. Juliet Arsenic ND mg/kg 3.46 1 08/02/23 08:11 08/03/23 11:16 7440-38-2 Barium 11.2 mg/kg 0.865 1 08/02/23 08:11 08/03/23 11:16 7440-39-3 Cadmium ND mg/kg 0.865 1 08/02/23 08:11 08/03/23 11:16 7440-43-9 Chromium 5.70 mg/kg 1.73 1 08/02/23 08:11 08/03/23 11:16 7440-47-3 Lead 31.5 mg/kg 0.865 1 08/02/23 08:11 08/03/23 11:16 7439-92-1 Selenium ND mg/kg 3.46 1 08/02/23 08:11 08/03/23 11:16 7782-49-2 Silver ND mg/kg 1.73 1 08/02/23 08:11 08/03/23 11:16 7440-22-4 Mercury 7471 B Analytical Method: EPA 7471 B Preparation Method: 7471 A Pace National - Mt. Juliet Mercury ND mg/kg 0.0692 1 08/03/2312:00 08/04/2310:53 7439-97-6 Total Solids 2540 G-2011 Analytical Method: SM 2540G Preparation Method: SM 2540 G Pace National - Mt. Juliet Total Solids 79.5 % 1 08/01 /23 09:24 08/01 /23 09:36 Total Solids 57.8 % 1 08/02/23 06:39 08/02/23 06:46 Wet Chemistry 7199 Analytical Method: EPA 7199 Preparation Method: 3060A Pace National - Mt. Juliet Chromium, Hexavalent ND mg/kg 1.26 1 08/01 /23 08:01 08/01 /23 15:38 18540-29-9 Date: 08/07/2023 08:45 AM REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, LLC. Page 6 of 22 ANALYTICAL RESULTS Project: RESIDENCE @9TH-909 Pace Project No.: 92679694 Pace Analytical Services, LLC 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 Sample: 136 Lab ID: 92679694002 Collected: 07/27/23 09:55 Received: 07/28/23 09:36 Matrix: Solid Results reported on a "dry weight" basis and are adjusted for percent moisture, sample size and any dilutions. Parameters Results Units Report Limit DF Prepared Analyzed CAS No. Qual Metals (ICP) 6010D Analytical Method: EPA 6010D Preparation Method: 3050B Pace National - Mt. Juliet Arsenic ND mg/kg 2.49 1 08/02/23 08:11 08/03/23 11:19 7440-38-2 Barium 8.89 mg/kg 0.623 1 08/02/23 08:11 08/03/23 11:19 7440-39-3 Cadmium ND mg/kg 0.623 1 08/02/23 08:11 08/03/23 11:19 7440-43-9 Chromium 6.36 mg/kg 1.25 1 08/02/23 08:11 08/03/23 11:19 7440-47-3 Lead 8.17 mg/kg 0.623 1 08/02/23 08:11 08/03/23 11:19 7439-92-1 Selenium ND mg/kg 2.49 1 08/02/23 08:11 08/03/23 11:19 7782-49-2 Silver ND mg/kg 1.25 1 08/02/23 08:11 08/03/23 11:19 7440-22-4 Mercury 7471 B Analytical Method: EPA 7471 B Preparation Method: 7471 A Pace National - Mt. Juliet Mercury 0.0815 mg/kg 0.0498 1 08/03/2312:00 08/04/2310:55 7439-97-6 Total Solids 2540 G-2011 Analytical Method: SM 2540G Preparation Method: SM 2540 G Pace National - Mt. Juliet Total Solids 83.4 % 1 08/01 /23 09:24 08/01 /23 09:36 Total Solids 80.3 % 1 08/02/23 06:39 08/02/23 06:46 Wet Chemistry 7199 Analytical Method: EPA 7199 Preparation Method: 3060A Pace National - Mt. Juliet Chromium, Hexavalent ND mg/kg 1.20 1 08/01 /23 08:01 08/01 /23 15:43 18540-29-9 Date: 08/07/2023 08:45 AM REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, LLC. Page 7 of 22 ANALYTICAL RESULTS Project: RESIDENCE @9TH-909 Pace Project No.: 92679694 Pace Analytical Services, LLC 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 Sample: 137 Lab ID: 92679694003 Collected: 07/27/23 10:10 Received: 07/28/23 09:36 Matrix: Solid Results reported on a "dry weight" basis and are adjusted for percent moisture, sample size and any dilutions. Parameters Results Units Report Limit DF Prepared Analyzed CAS No. Qual Metals (ICP) 6010D Analytical Method: EPA 6010D Preparation Method: 3050B Pace National - Mt. Juliet Arsenic ND mg/kg 2.56 1 08/02/23 08:11 08/03/23 11:22 7440-38-2 Barium 2.95 mg/kg 0.641 1 08/02/23 08:11 08/03/23 11:22 7440-39-3 Cadmium ND mg/kg 0.641 1 08/02/23 08:11 08/03/23 11:22 7440-43-9 Chromium 2.66 mg/kg 1.28 1 08/02/23 08:11 08/03/23 11:22 7440-47-3 Lead 1.65 mg/kg 0.641 1 08/02/23 08:11 08/03/23 11:22 7439-92-1 Selenium ND mg/kg 2.56 1 08/02/23 08:11 08/03/23 11:22 7782-49-2 Silver ND mg/kg 1.28 1 08/02/23 08:11 08/03/23 11:22 7440-22-4 Mercury 7471 B Analytical Method: EPA 7471 B Preparation Method: 7471 A Pace National - Mt. Juliet Mercury ND mg/kg 0.0513 1 08/03/2312:00 08/04/2310:58 7439-97-6 Total Solids 2540 G-2011 Analytical Method: SM 2540G Preparation Method: SM 2540 G Pace National - Mt. Juliet Total Solids 84.6 % 1 08/01 /23 09:24 08/01 /23 09:36 Total Solids 78.0 % 1 08/02/23 06:39 08/02/23 06:46 Wet Chemistry 7199 Analytical Method: EPA 7199 Preparation Method: 3060A Pace National - Mt. Juliet Chromium, Hexavalent ND mg/kg 1.18 1 08/01/23 17:52 08/02/23 11:46 18540-29-9 Date: 08/07/2023 08:45 AM REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, LLC. Page 8 of 22 ANALYTICAL RESULTS Project: RESIDENCE @9TH-909 Pace Project No.: 92679694 Pace Analytical Services, LLC 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 Sample: 138 Lab ID: 92679694004 Collected: 07/27/23 10:25 Received: 07/28/23 09:36 Matrix: Solid Results reported on a "dry weight" basis and are adjusted for percent moisture, sample size and any dilutions. Parameters Results Units Report Limit DF Prepared Analyzed CAS No. Qual Metals (ICP) 6010D Analytical Method: EPA 6010D Preparation Method: 3050B Pace National - Mt. Juliet Arsenic ND mg/kg 2.49 1 08/02/23 08:11 08/03/23 11:24 7440-38-2 Barium 5.00 mg/kg 0.623 1 08/02/23 08:11 08/03/23 11:24 7440-39-3 Cadmium ND mg/kg 0.623 1 08/02/23 08:11 08/03/23 11:24 7440-43-9 Chromium 3.32 mg/kg 1.25 1 08/02/23 08:11 08/03/23 11:24 7440-47-3 Lead 25.8 mg/kg 0.623 1 08/02/23 08:11 08/03/23 11:24 7439-92-1 Selenium ND mg/kg 2.49 1 08/02/23 08:11 08/03/23 11:24 7782-49-2 Silver ND mg/kg 1.25 1 08/02/23 08:11 08/03/23 11:24 7440-22-4 Mercury 7471 B Analytical Method: EPA 7471 B Preparation Method: 7471 A Pace National - Mt. Juliet Mercury 0.0746 mg/kg 0.0499 1 08/03/2312:00 08/04/2311:00 7439-97-6 Total Solids 2540 G-2011 Analytical Method: SM 2540G Preparation Method: SM 2540 G Pace National - Mt. Juliet Total Solids 81.6 % 1 08/01 /23 09:24 08/01 /23 09:36 Total Solids 80.2 % 1 08/02/23 06:39 08/02/23 06:46 Wet Chemistry 7199 Analytical Method: EPA 7199 Preparation Method: 3060A Pace National - Mt. Juliet Chromium, Hexavalent ND mg/kg 1.23 1 08/01/23 17:52 08/02/23 11:51 18540-29-9 Date: 08/07/2023 08:45 AM REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, LLC. Page 9 of 22 ANALYTICAL RESULTS Project: RESIDENCE @9TH-909 Pace Project No.: 92679694 Pace Analytical Services, LLC 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 Sample: 139 Lab ID: 92679694005 Collected: 07/27/23 10:45 Received: 07/28/23 09:36 Matrix: Solid Results reported on a "dry weight" basis and are adjusted for percent moisture, sample size and any dilutions. Parameters Results Units Report Limit DF Prepared Analyzed CAS No. Qual Metals (ICP) 6010D Analytical Method: EPA 6010D Preparation Method: 3050B Pace National - Mt. Juliet Arsenic ND mg/kg 2.51 1 08/02/23 08:11 08/03/23 11:27 7440-38-2 Barium 2.30 mg/kg 0.627 1 08/02/23 08:11 08/03/23 11:27 7440-39-3 Cadmium ND mg/kg 0.627 1 08/02/23 08:11 08/03/23 11:27 7440-43-9 Chromium 3.54 mg/kg 1.25 1 08/02/23 08:11 08/03/23 11:27 7440-47-3 Lead 1.38 mg/kg 0.627 1 08/02/23 08:11 08/03/23 11:27 7439-92-1 Selenium ND mg/kg 2.51 1 08/02/23 08:11 08/03/23 11:27 7782-49-2 Silver ND mg/kg 1.25 1 08/02/23 08:11 08/03/23 11:27 7440-22-4 Mercury 7471 B Analytical Method: EPA 7471 B Preparation Method: 7471 A Pace National - Mt. Juliet Mercury ND mg/kg 0.0502 1 08/03/2312:00 08/04/2311:03 7439-97-6 Total Solids 2540 G-2011 Analytical Method: SM 2540G Preparation Method: SM 2540 G Pace National - Mt. Juliet Total Solids 80.5 % 1 08/01 /23 09:24 08/01 /23 09:36 Total Solids 79.7 % 1 08/02/23 06:39 08/02/23 06:46 Wet Chemistry 7199 Analytical Method: EPA 7199 Preparation Method: 3060A Pace National - Mt. Juliet Chromium, Hexavalent ND mg/kg 1.24 1 08/01/23 17:52 08/02/23 11:57 18540-29-9 Date: 08/07/2023 08:45 AM REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, LLC. Page 10 of 22 ANALYTICAL RESULTS Project: RESIDENCE @9TH-909 Pace Project No.: 92679694 Pace Analytical Services, LLC 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 Sample: B10 Lab ID: 92679694006 Collected: 07/27/23 11:05 Received: 07/28/23 09:36 Matrix: Solid Results reported on a "dry weight" basis and are adjusted for percent moisture, sample size and any dilutions. Parameters Results Units Report Limit DF Prepared Analyzed CAS No. Qual Metals (ICP) 6010D Analytical Method: EPA 6010D Preparation Method: 3050B Pace National - Mt. Juliet Arsenic ND mg/kg 2.47 1 08/02/23 08:11 08/03/23 11:30 7440-38-2 Barium 8.33 mg/kg 0.618 1 08/02/23 08:11 08/03/23 11:30 7440-39-3 Cadmium ND mg/kg 0.618 1 08/02/23 08:11 08/03/23 11:30 7440-43-9 Chromium 5.65 mg/kg 1.24 1 08/02/23 08:11 08/03/23 11:30 7440-47-3 Lead 13.0 mg/kg 0.618 1 08/02/23 08:11 08/03/23 11:30 7439-92-1 Selenium ND mg/kg 2.47 1 08/02/23 08:11 08/03/23 11:30 7782-49-2 Silver ND mg/kg 1.24 1 08/02/23 08:11 08/03/23 11:30 7440-22-4 Mercury 7471 B Analytical Method: EPA 7471 B Preparation Method: 7471 A Pace National - Mt. Juliet Mercury 0.0496 mg/kg 0.0494 1 08/03/2312:00 08/04/2311:05 7439-97-6 Total Solids 2540 G-2011 Analytical Method: SM 2540G Preparation Method: SM 2540 G Pace National - Mt. Juliet Total Solids 80.9 % 1 08/02/23 06:39 08/02/23 06:46 Total Solids 82.1 % 1 08/01 /23 09:24 08/01 /23 09:36 Wet Chemistry 7199 Analytical Method: EPA 7199 Preparation Method: 3060A Pace National - Mt. Juliet Chromium, Hexavalent ND mg/kg 1.22 1 08/01/23 17:52 08/02/23 12:02 18540-29-9 Date: 08/07/2023 08:45 AM REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, LLC. Page 11 of 22 QUALITY CONTROL DATA Project: RESIDENCE @9TH-909 Pace Project No.: 92679694 QC Batch: 2106131 Analysis Method: EPA 601 OD QC Batch Method: 3050B Analysis Description: Metals (ICP) 601OD Laboratory: Pace National - Mt. Juliet Associated Lab Samples: 92679694001, 92679694002, 92679694003, 92679694004, 92679694005, 92679694006 METHOD BLANK: R3956451-1 Matrix: Solid Associated Lab Samples: 92679694001) 92679694002) 92679694003) 92679694004) 92679694005) 92679694006 Blank Reporting Parameter Units Result Limit Analyzed Qualifiers Arsenic mg/kg ND 2.00 08/03/23 10:08 Barium mg/kg ND 0.500 08/03/23 10:08 Cadmium mg/kg ND 0.500 08/03/23 10:08 Chromium mg/kg ND 1.00 08/03/23 10:08 Lead mg/kg ND 0.500 08/03/23 10:08 Selenium mg/kg ND 2.00 08/03/23 10:08 Silver mg/kg ND 1.00 08/03/23 10:08 LABORATORY CONTROL SAMPLE: R3956451-2 Parameter Units Spike LCS LCS % Rec Conc. Result % Rec Limits Arsenic mg/kg 100 99.4 99.4 80.0-120 Barium mg/kg 100 101 101 80.0-120 Cadmium mg/kg 100 96.4 96.4 80.0-120 Chromium mg/kg 100 96.6 96.6 80.0-120 Lead mg/kg 100 95.8 95.8 80.0-120 Selenium mg/kg 100 95.1 95.1 80.0-120 Silver mg/kg 20.0 18.8 94.1 80.0-120 MATRIX SPIKE & MATRIX SPIKE DUPLICATE: R3956451-5 R3956451-6 MS MSD L1640456-11 Spike Spike MS MSD Parameter Units Resu It Conc. Conc. Result Resu It Arsenic mg/kg 2.90 100 100 122 116 Barium mg/kg 92.9 100 100 204 171 Cadmium mg/kg 0.547 100 100 114 110 Chromium mg/kg 5.97 100 100 104 100 Lead mg/kg 0.358 100 100 106 102 Selenium mg/kg ND 100 100 112 108 Silver mg/kg ND 20.0 20.0 22.9 22.2 Pace Analytical Services, LLC 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 Qualifiers MS MSD % Rec Max % Rec % Rec Limits RPD RPD Qual 119 113 75.0-125 4.85 20 111 77.6 75.0-125 17.8 20 113 109 75.0-125 3.72 20 98.0 94.2 75.0-125 3.72 20 106 102 75.0-125 3.61 20 112 108 75.0-125 3.58 20 115 111 75.0-125 3.25 20 Results presented on this page are in the units indicated by the "Units" column except where an alternate unit is presented to the right of the result. REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, Date: 08/07/2023 08:45 AM without the written consent of Pace Analytical Services, LLC. Page 12 of 22 Pace Analytical Services, LLC 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 QUALITY CONTROL DATA Project: RESIDENCE @9TH-909 Pace Project No.: 92679694 QC Batch: 2106853 Analysis Method: EPA 7471 B QC Batch Method: 7471 A Analysis Description: Mercury 7471 B Laboratory: Pace National - Mt. Juliet Associated Lab Samples: 92679694001, 92679694002, 92679694003, 92679694004, 92679694005, 92679694006 METHOD BLANK: R3956848-1 Matrix: Solid Associated Lab Samples: 92679694001) 92679694002) 92679694003) 92679694004) 92679694005) 92679694006 Blank Reporting Parameter Units Result Limit Analyzed Qualifiers Mercury mg/kg ND 0.0400 08/04/2310:00 LABORATORY CONTROL SAMPLE: R3956848-2 Spike LCS LCS % Rec Parameter Units Conc. Result % Rec Limits Qualifiers Mercury mg/kg 0.500 0.483 96.6 80.0-120 MATRIX SPIKE & MATRIX SPIKE DUPLICATE: R3956848-3 R3956848-4 MS MSD L1640162-03 Spike Spike MS MSD MS MSD % Rec Max Parameter Units Result Conc. Conc. Result Result % Rec % Rec Limits RPD RPD Qual Mercury mg/kg ND 0.591 0.591 0.536 0.535 90.8 90.5 75.0-125 0.322 20 Results presented on this page are in the units indicated by the "Units" column except where an alternate unit is presented to the right of the result. REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, Date: 08/07/2023 08:45 AM without the written consent of Pace Analytical Services, LLC. Page 13 of 22 Pace Analytical Services, LLC 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 QUALITY CONTROL DATA Project: RESIDENCE @9TH-909 Pace Project No.: 92679694 QC Batch: 2104652 Analysis Method: SM 2540G QC Batch Method: SM 2540 G Analysis Description: Total Solids 2540 G-2011 Laboratory: Pace National - Mt. Juliet Associated Lab Samples: 92679694001, 92679694002, 92679694003, 92679694004, 92679694005, 92679694006 METHOD BLANK: R3955572-1 Matrix: Solid Associated Lab Samples: 92679694001) 92679694002) 92679694003) 92679694004) 92679694005) 92679694006 Blank Reporting Parameter Units Result Limit Analyzed Qualifiers Total Solids % 0.00100 08/01/23 09:36 LABORATORY CONTROL SAMPLE: R3955572-2 Spike LCS LCS % Rec Parameter Units Conc. Result % Rec Limits Qualifiers Total Solids % 50.0 50.0 100 85.0-115 SAMPLE DUPLICATE: R3955572-3 92679694003 Dup Max Parameter Units Result Result RPD RPD Qualifiers Total Solids % 84.6 83.8 0.999 10 Results presented on this page are in the units indicated by the "Units" column except where an alternate unit is presented to the right of the result. REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, Date: 08/07/2023 08:45 AM without the written consent of Pace Analytical Services, LLC. Page 14 of 22 Pace Analytical Services, LLC 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 QUALITY CONTROL DATA Project: RESIDENCE @9TH-909 Pace Project No.: 92679694 QC Batch: 2106052 Analysis Method: SM 2540G QC Batch Method: SM 2540 G Analysis Description: Total Solids 2540 G-2011 Laboratory: Pace National - Mt. Juliet Associated Lab Samples: 92679694001, 92679694002, 92679694003, 92679694004, 92679694005, 92679694006 METHOD BLANK: R3955920-1 Matrix: Solid Associated Lab Samples: 92679694001) 92679694002) 92679694003) 92679694004) 92679694005) 92679694006 Blank Reporting Parameter Units Result Limit Analyzed Qualifiers Total Solids % 0.00200 08/02/23 06:46 LABORATORY CONTROL SAMPLE: R3955920-2 Spike LCS LCS % Rec Parameter Units Conc. Result % Rec Limits Qualifiers Total Solids % 50.0 50.0 100 85.0-115 SAMPLE DUPLICATE: R3955920-3 L1640467-02 Dup Max Parameter Units Result Result RPD RPD Qualifiers Total Solids % 78.3 77.9 0.564 10 Results presented on this page are in the units indicated by the "Units" column except where an alternate unit is presented to the right of the result. REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, Date: 08/07/2023 08:45 AM without the written consent of Pace Analytical Services, LLC. Page 15 of 22 QUALITY CONTROL DATA Project: RESIDENCE @9TH-909 Pace Project No.: 92679694 QC Batch: 2104468 Analysis Method: EPA 7199 QC Batch Method: 3060A Analysis Description: Wet Chemistry 7199 Laboratory: Pace National - Mt. Juliet Associated Lab Samples: 92679694001, 92679694002 METHOD BLANK: R3955463-1 Matrix: Solid Associated Lab Samples: 92679694001, 92679694002 Blank Reporting Parameter Units Result Limit Analyzed Qualifiers Chromium, Hexavalent mg/kg ND 1.00 08/01 /23 14:28 LABORATORY CONTROL SAMPLE: R3955463-2 Parameter Units Chromium, Hexavalent Pace Analytical Services, LLC 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 Spike LCS LCS % Rec Conc. Result % Rec Limits Qualifiers mg/kg 10.0 11.4 114 80.0-120 MATRIX SPIKE & MATRIX SPIKE DUPLICATE: R3955463-3 R3955463-4 MS MSD L1639593-01 Spike Spike MS MSD MS MSD % Rec Max Parameter Units Result Conc. Conc. Result Result % Rec % Rec Limits RPD RPD Qual Chromium, Hexavalent mg/kg ND 20.0 20.0 0.384 12.8 1.92 63.9 75.0-125 188 20 ML, R1 MATRIX SPIKE SAMPLE: R3955463-5 L1639593-01 Spike MS MS % Rec Parameter Units Result Conc. Result % Rec Limits Qualifiers Chromium, Hexavalent mg/kg ND 648 383 59.1 75.0-125 ML SAMPLE DUPLICATE: R3955463-7 L1639849-01 Dup Max Parameter Units Result Result RPD RPD Qualifiers Chromium, Hexavalent mg/kg ND ND 0.00 20 SAMPLE DUPLICATE: R3955463-8 L1640469-05 Dup Max Parameter Units Result Result RPD RPD Qualifiers Chromium, Hexavalent mg/kg ND ND 0.00 20 Results presented on this page are in the units indicated by the "Units" column except where an alternate unit is presented to the right of the result. REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, Date: 08/07/2023 08:45 AM without the written consent of Pace Analytical Services, LLC. Page 16 of 22 QUALITY CONTROL DATA Project: RESIDENCE @9TH-909 Pace Project No.: 92679694 QC Batch: 2104471 Analysis Method: EPA 7199 QC Batch Method: 3060A Analysis Description: Wet Chemistry 7199 Laboratory: Pace National - Mt. Juliet Associated Lab Samples: 92679694003, 92679694004, 92679694005, 92679694006 METHOD BLANK: R3955974-1 Matrix: Solid Associated Lab Samples: 92679694003, 92679694004, 92679694005, 92679694006 Blank Reporting Parameter Units Result Limit Analyzed Qualifiers Chromium, Hexavalent mg/kg ND 1.00 08/02/23 10:37 LABORATORY CONTROL SAMPLE: R3955974-2 Parameter Units Chromium, Hexavalent Pace Analytical Services, LLC 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 Spike LCS LCS % Rec Conc. Result % Rec Limits Qualifiers mg/kg 10.0 10.9 109 80.0-120 MATRIX SPIKE & MATRIX SPIKE DUPLICATE: R3955974-3 R3955974-4 MS MSD L1640161-02 Spike Spike MS MSD MS MSD % Rec Max Parameter Units Result Conc. Conc. Result Result % Rec % Rec Limits RPD RPD Qual Chromium, Hexavalent mg/kg 0.325 24.2 24.2 21.7 21.2 107 104 75.0-125 2.35 20 MATRIX SPIKE SAMPLE: R3955974-5 L1640161-02 Spike MS MS % Rec Parameter Units Result Conc. Result % Rec Limits Qualifiers Chromium, Hexavalent mg/kg 0.325 777 562 87.5 75.0-125 SAMPLE DUPLICATE: R3955974-7 L1640161-04 Dup Max Parameter Units Result Result RPD RPD Qualifiers Chromium, Hexavalent mg/kg ND ND 0.00 20 SAMPLE DUPLICATE: R3955974-8 L1640179-04 Dup Max Parameter Units Result Result RPD RPD Qualifiers Chromium, Hexavalent mg/kg 0.559 ND 5.94 20 Results presented on this page are in the units indicated by the "Units" column except where an alternate unit is presented to the right of the result. REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, Date: 08/07/2023 08:45 AM without the written consent of Pace Analytical Services, LLC. Page 17 of 22 Pace Analytical Services, LLC 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 QUALIFIERS Project: RESIDENCE @9TH-909 Pace Project No.: 92679694 DEFINITIONS DF - Dilution Factor, if reported, represents the factor applied to the reported data due to dilution of the sample aliquot. ND - Not Detected at or above adjusted reporting limit. TNTC - Too Numerous To Count J - Estimated concentration above the adjusted method detection limit and below the adjusted reporting limit. MDL -Adjusted Method Detection Limit. PQL - Practical Quantitation Limit. RL - Reporting Limit - The lowest concentration value that meets project requirements for quantitative data with known precision and bias for a specific analyte in a specific matrix. S - Surrogate 1,2-Diphenylhydrazine decomposes to and cannot be separated from Azobenzene using Method 8270. The result for each analyte is a combined concentration. Consistent with EPA guidelines, unrounded data are displayed and have been used to calculate % recovery and RPD values. LCS(D) - Laboratory Control Sample (Duplicate) MS(D) - Matrix Spike (Duplicate) DUP - Sample Duplicate RPD - Relative Percent Difference NC - Not Calculable. SG - Silica Gel - Clean -Up U - Indicates the compound was analyzed for, but not detected. Acid preservation may not be appropriate for 2 Chloroethylvinyl ether. A separate vial preserved to a pH of 4-5 is recommended in SW846 Chapter 4 for the analysis of Acrolein and Acrylonitrile by EPA Method 8260. N-Nitrosodiphenylamine decomposes and cannot be separated from Diphenylamine using Method 8270. The result reported for each analyte is a combined concentration. Reported results are not rounded until the final step prior to reporting. Therefore, calculated parameters that are typically reported as "Total" may vary slightly from the sum of the reported component parameters. Pace Analytical is TN accredited. Contact your Pace PM for the current list of accredited analytes. TNI - The N E LAC Institute. ANALYTE QUALIFIERS ML Matrix spike recovery and/or matrix spike duplicate recovery was below laboratory control limits. Result may be biased ow. R1 RPD value was outside control limits. REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, Date: 08/07/2023 08:45 AM without the written consent of Pace Analytical Services, LLC. Page 18 of 22 Pace Analytical Services, LLC 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 QUALITY CONTROL DATA CROSS REFERENCE TABLE Project: Pace Project No.: RESIDENCE @9TH-909 92679694 Analytical Lab ID Sample ID QC Batch Method QC Batch Analytical Method Batch 92679694001 B5 3050B 2106131 EPA 6010D 2106131 92679694002 B6 3050B 2106131 EPA 6010D 2106131 92679694003 B7 3050B 2106131 EPA 6010D 2106131 92679694004 B8 3050B 2106131 EPA 6010D 2106131 92679694005 B9 3050B 2106131 EPA 6010D 2106131 92679694006 B10 3050B 2106131 EPA 6010 D 2106131 92679694001 B5 7471A 2106853 EPA 7471 B 2106853 92679694002 B6 7471A 2106853 EPA 7471 B 2106853 92679694003 B7 7471A 2106853 EPA 7471 B 2106853 92679694004 B8 7471A 2106853 EPA 7471 B 2106853 92679694005 B9 7471A 2106853 EPA 7471 B 2106853 92679694006 B10 7471A 2106853 EPA 7471 B 2106853 92679694001 B5 SM 2540 G 2104652 SM 2540G 2104652 92679694001 B5 SM 2540 G 2106052 SM 2540G 2106052 92679694002 B6 SM 2540 G 2104652 SM 2540G 2104652 92679694002 B6 SM 2540 G 2106052 SM 2540G 2106052 92679694003 B7 SM 2540 G 2104652 SM 2540G 2104652 92679694003 B7 SM 2540 G 2106052 SM 2540G 2106052 92679694004 B8 SM 2540 G 2104652 SM 2540G 2104652 92679694004 B8 SM 2540 G 2106052 SM 2540G 2106052 92679694005 B9 SM 2540 G 2104652 SM 2540G 2104652 92679694005 B9 SM 2540 G 2106052 SM 2540G 2106052 92679694006 B10 SM 2540 G 2104652 SM 2540G 2104652 92679694006 B10 SM 2540 G 2106052 SM 2540G 2106052 92679694001 B5 3060A 2104468 EPA 7199 2104468 92679694002 B6 3060A 2104468 EPA 7199 2104468 92679694003 B7 3060A 2104471 EPA 7199 2104471 92679694004 B8 3060A 2104471 EPA 7199 2104471 92679694005 B9 3060A 2104471 EPA 7199 2104471 92679694006 B10 3060A 2104471 EPA 7199 2104471 Date: 08/07/2023 08:45 AM REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, LLC. Page 19 of 22 c c _ 3 3 c x a3o a a o K a < 3 3 < n 3 n 3dF s m g n c c _ O D a o _ FF a °' G1 °' v >:E A a an d •ac a T o A o O O K m w O1 •-• m N d a ti 3 3 3 n x m o p f° F noz v 0 Gf G O m o 7 0 NC ? 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Z 2 ,2Z T. z z V u y o o ° D n n ^ Page 21 of 2 E - ace DCif Title: ENV-FRM-HUN1-0083 v02 Sample Condition Upon Receipt Effective Date: 11/14/2022 *Check mark top half of box if pH and/or dechlorination is verified and project I W®## : 92679694 within the acceptance range for preservation samples. PM: BV Due Date: 08/04/23 Exceptions: VOA, Coliform, TOC, Oil and Grease, DR0/801S (water) DOC. LLHg CLIENT: 92-Henr yNems "Bottom half of box is to list number of bottles ***Checkall unpreserved Nitrates for chlorine E Y v a ,-I Q 6 rQ B n S J T n m h n d J VI N 6 W t Y n rY ti 6 m N O 6 ,y Q 6 N ry O n J N 1�1 6 m Z A •y Q 6 m B Oi Z n ,-1 Q 6 0 C E LL � Z E ¢ = .-1 H L7 ¢ v X ' E Q '1 •'r 17 Q Z B n E ¢ J N N V Q n a Q eya� •'1 U' Q N E ¢ N M Q .�. i a Q o q pi l] ¢ o > o Q p1 l7 O z ¢ >> E P 1n > i Q & a O o d P > a O o •r Y ♦7 G Z Z y E N LL Y Z n > \ i N ¢ ;; N N ,N,� 6 N A ¢ z_ SA N c N 6 N M v o Z d yof� N 6 0 ? Z Y Dn of O 00 Q b N E N N > N Y v ¢ E d '7 om O 1 2 NN 3 a 4 � 5 a 6 a 7 8 10 11 tz pH Adjustment Log for Preserved Samples Sample ID Type of Preservative pH upan receipt Date preservation adjusted Time preservation adjusted Amount of Preservative added Lot # -------- _.._. _ ._ _ _.._.=r- =r -• _=• ••6.•..,.:..a:..,,:.a =e,np„c.uc ,cn:prea, a aopy or mrs roan win ce sent to the north Carolina DENR Certification Office (i.e. Out of hold, incorrect preservative, out of temp, incorrect containers. Qualtrax ID: 69614 Page 2 of 2 Page 22 of 22 M a ce Analytical www.pacelabs.com Pace Analytical Services, LLC 9800 Kincey Ave. Suite 100 Huntersville. NC 28078 (704)875-9092 June 26, 2023 Henry Nemargut Henry Nemargut Engineering 2211 Chestnut Street Wilmington, NC 28405 RE: Project: RESIDENCE AT 9TH LLC Pace Project No.: 92673011 Dear Henry Nemargut: Enclosed are the analytical results for sample(s) received by the laboratory on June 16, 2023. The results relate only to the samples included in this report. Results reported herein conform to the applicable TNI/NELAC Standards and the laboratory's Quality Manual, where applicable, unless otherwise noted in the body of the report. The test results provided in this final report were generated by each of the following laboratories within the Pace Network: • Pace Analytical Services - Asheville If you have any questions concerning this report, please feel free to contact me. Sincerely, �� A) Bonnie Vang bonnie.vang@pacelabs.com (704)875-9092 Project Manager Enclosures pCCRF��� TNI REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, LLC. Page 1 of 12 Pace Analytical Services, LLC ceAnalytical 9800 ncey Ave. Suite 100 078 Huntersville, NC 28078 www.pacelabSMITI +/ (704)875-9092 CERTIFICATIONS Project: RESIDENCE AT 9TH LLC Pace Project No.: 92673011 Pace Analytical Services Asheville 2225 Riverside Drive, Asheville, NC 28804 South Carolina Laboratory ID: 99030 Florida/NELAP Certification #: E87648 South Carolina Certification #: 99030001 North Carolina Drinking Water Certification #: 37712 UrginiaNELAP Certification #: 460222 North Carolina Wastewater Certification #: 40 REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, withoutthe written consent of Pace Analytical Services, LLC. Page 2 of 12 aceAnalytical www.pacelabS.com Pace Analytical Services, LLC 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 699 Jtl» BYO Jtl Jd9:� 1 Project: RESIDENCE AT 9TH LLC Pace Project No.: 92673011 Lab ID Sample ID Matrix Date Collected Date Received 92673011001 92673011002 C-1 C-2 Solid Solid 06/1423 21:05 06/1423 21:10 06/1623 11:30 06/1623 11:30 REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, withoutthe written consent of Pace Analytical Services, LLC. Page 3 of 12 aceAnalytical www.pacelabS.com Pace Analytical Services, LLC 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 L,_1PtlUIII =1119�19wig 1�K011PIII 1 Project: RESIDENCE AT 9TH LLC Pace Project No.: 92673011 Analytes Lab ID Sample ID Method Analysts Reported Laboratory 92673011001 C-1 EPA 6010D DBB1 7 PASI-A EPA7470A NMP 1 PASI-A 92673011002 C-2 EPA 6010D DBB1 7 PASI-A EPA7470A NMP 1 PASI-A PASI-A = Pace Analytical Services - Asheville REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, LLC. Page 4 of 12 aceAnalytical www.pacelabe.com Pace Analytical Services, LLC 9800 Kincey Ave. Suite 100 Hunterwille, NC 28078 (704)875-9092 19�19Will IW-Al0N4Y110K Project: RESIDENCE AT 9TH LLC Pace Project No.: 92673011 Sample: C-1 Lab ID: 92673011001 Collected: 06/14/23 21:05 Received: 06/16/23 11 :30 Matrix: Solid Results reported on a "dry weight" basis and are adjusted for percent moisture, sample size and any dilutions. Parameters Results Units Report Limit DF Prepared Analyzed CAS No. Qual 6010 MET ICP, TCLP Analytical Method: EPA6010D Preparation Method: EPA3010A Leachate Method/Date: EPA1311; 06/19/2315:54 Initial pH: 5.52; Final pH: 2 Pace Analytical Services - Asheville Arsenic ND mg/L 0.050 1 06/21/2300:09 06/21/231925 7440-38-2 Barium ND mg/L 0.25 1 06/21/2300:09 06/21/231925 7440-39-3 Cadmium ND mg/L 0.0050 1 06/21/2300:09 06/21/231925 7440-43-9 Chromium ND mg/L 0.050 1 06/21/2300:09 06/21/231925 7440-47-3 Lead ND mg/L 0.025 1 06/21/2300:09 06/21/231925 7439-92-1 Selenium ND mg/L 0.10 1 06/21/2300:09 06/21/231925 7782-49-2 Silver ND mg/L 0.025 1 06/21/2300:09 06/21/231925 7440-22-4 7470 Mercury, TCLP Analytical Method: EPA7470A Preparation Method: EPA7470A Leachate Method/Date: EPA1311; 06/19/2315:54 Initial pH: 5.52; Final pH: 2 Pace Analytical Services - Asheville Mercury ND mg/L 0.00020 1 06/21/2310:37 06/23/2311 :23 7439-97-6 REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, Date: 06/26/2023 12:42 PM without the written consent of Pace Analytical Services, LLC. Page 5 of 12 aceAnalytical www.pacelabe.com Pace Analytical Services, LLC 9800 Kincey Ave. Suite 100 Hunterwille, NC 28078 (704)875-9092 19�19Will IW-Al0N4Y110K Project: RESIDENCE AT 9TH LLC Pace Project No.: 92673011 Sample: C-2 Lab ID: 92673011002 Collected: 06/14/23 21:10 Received: 06/16/23 11 :30 Matrix: Solid Results reported on a "dry weight" basis and are adjusted for percent moisture, sample size and any dilutions. Parameters Results Units Report Limit DF Prepared Analyzed CAS No. Qual 6010 MET ICP, TCLP Analytical Method: EPA6010D Preparation Method: EPA3010A Leachate Method/Date: EPA1311; 06/19/2315:54 Initial pH: 5.75; Final pH: 2 Pace Analytical Services - Asheville Arsenic ND mg/L 0.050 1 06/21/2300:09 06/21/231936 7440-38-2 Barium ND mg/L 0.25 1 06/21/2300:09 06/21/231936 7440-39-3 Cadmium ND mg/L 0.0050 1 06/21/2300:09 06/21/231936 7440-43-9 Chromium ND mg/L 0.050 1 06/21/2300:09 06/21/231936 7440-47-3 Lead ND mg/L 0.025 1 06/21/2300:09 06/21/231936 7439-92-1 Selenium ND mg/L 0.10 1 06/21/2300:09 06/21/231936 7782-49-2 Silver ND mg/L 0.025 1 06/21/2300:09 06/21/231936 7440-22-4 7470 Mercury, TCLP Analytical Method: EPA7470A Preparation Method: EPA7470A Leachate Method/Date: EPA1311; 06/19/2315:54 Initial pH: 5.75; Final pH: 2 Pace Analytical Services - Asheville Mercury ND mg/L 0.00020 1 06/21/2310:37 06/23/2311 :30 7439-97-6 REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, Date: 06/26/2023 12:42 PM without the written consent of Pace Analytical Services, LLC. Page 6 of 12 aceAnalytical www.pacelabSMITI Pace Analytical Services, LLC 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 Project: RESIDENCE AT 9TH LLC Pace Project No.: 92673011 QC Batch: 781883 QC Batch Method: EPA 7470A Associated Lab Samples: 92673011001, 92673011002 QUALITY CONTROL DATA Analysis Method: EPA 7470A Analysis Description: 7470 Mercury TCLP Laboratory: Pace Analytical Services -Asheville METHOD BLANK: 4053805 Matrix: Water Associated Lab Samples: 92673011001, 92673011002 Blank Reporting Parameter Units Result Limit Analyzed Qualifiers Mercury mg/L ND 0.00020 06/23/2311:14 LABORATORY CONTROL SAMPLE: 4056151 Spike LCS LCS % Rec Parameter Units Conic. Result % Rec Limits Qualifiers Mercury mg/L 0.0025 0.0028 111 80-120 MATRIX SPIKE& MATRIX SPIKE DUPLICATE: 4056152 4056153 MS MSD 92673011001 Spike Spike MS MSD MS MSD % Rec Max Parameter Units Result Conic. Conic. Result Result % Rec % Rec Limits RPD RPD Qual Mercury mg/L ND 0.0025 0.0025 0.0027 0.0026 104 100 75-125 4 20 Results presented on this page are in the units indicated by the "Units" column except where an alte mate unit is presented to the right of the result. REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, Date: 06/26/2023 12:42 PM withoutthe written consent of Pace Analytical Services, LLC. Page 7 of 12 aceAnalytical www.pacelabSMITI Pace Analytical Services, LLC 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 Project: RESIDENCE AT 9TH LLC Pace Project No.: 92673011 QC Batch: 781857 QC Batch Method: EPA 3010A Associated Lab Samples: 92673011001, 92673011002 QUALITY CONTROL DATA Analysis Method: EPA6010D Analysis Description: 6010 MET TCLP Laboratory: Pace Analytical Services -Asheville METHOD BLANK: 4053805 Matrix: Water Associated Lab Samples: 92673011001, 92673011002 Blank Reporting Parameter Units Result Limit Analyzed Qualifiers Arsenic mg/L ND 0.050 06/21/2319:19 Barium mg/L ND 0.25 06/21/2319:19 Cadmium mg/L ND 0.0050 06/21/2319:19 Chromium mg/L ND 0.050 06/21/2319:19 Lead mg/L ND 0.025 06/21/2319:19 Selenium mg/L ND 0.10 06/21/2319:19 Silver mg/L ND 0.025 06/21/2319:19 LABORATORY CONTROL SAMPLE: 4056123 Spike LCS LCS % Rec Parameter Units Conic. Result % Rec Limits Qualifiers Arsenic mg/L 2.5 2.3 92 80-120 Barium mg/L 2.5 2.3 92 80-120 Cadmium mg/L 2.5 2.2 89 80-120 Chromium mg/L 2.5 2.3 90 80-120 Lead mg/L 2.5 2.3 90 80-120 Selenium mg/L 2.5 2.4 96 80-120 Silver mg/L 1.2 1.1 92 80-120 MATRIX SPIKE& MATRIX SPIKE DUPLICATE: 4056124 4056125 MS MSD 92673011001 Spike Spike MS MSD MS MSD % Rec Max Parameter Units Result Conic. Conic. Result Result % Rec % Rec Limits RPD RPD Qual Arsenic mg/L ND 2.5 2.5 2.3 2.0 91 80 75-125 13 20 Barium mg/L ND 2.5 2.5 2.5 2.2 91 79 75-125 13 20 Cadmium mg/L ND 2.5 2.5 2.2 1.9 87 76 75-125 13 20 Chromium mg/L ND 2.5 2.5 2.3 2.0 90 79 75-125 13 20 Lead mg/L ND 2.5 2.5 2.2 1.9 88 77 75-125 13 20 Selenium mg/L ND 2.5 2.5 2.3 2.1 94 82 75-125 13 20 Silver mg/L ND 1.2 1.2 1.1 0.98 90 79 75-125 14 20 Results presented on this page are in the units indicated by the "Units" column except where an alte mate unit is presented to the right of the result. REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, Date: 06/26/2023 12:42 PM withoutthe written consent of Pace Analytical Services, LLC. Page 8 of 12 aceAnalytical www.pacelabSMITI Pace Analytical Services, LLC 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 QUALIFIERS Project: RESIDENCE AT 9TH LLC Pace Project No.: 92673011 DEFINITIONS DF - Dilution Factor, if reported, represents the factor applied to the reported data due to dilution of the sample aliquot. ND - Not Detected at or above adjusted reporting limit. TNTC - Too Numerous To Count J - Estimated concentration above the adjusted method detection limit and below the adjusted reporting limit. MDL -Adjusted Method Detection Limit. PQL - Practical Quantitation Limit. RL - Reporting Limit - The lowest concentration value that meets project requirements for quantitative data with known precision and bias for a specific analyte in a specific matrix. S - Surrogate 1,2-Diphenylhydrazine decomposes to and cannot be separated from Azobenzene using Method 8270. The result for each analyte is a combined concentration. Consistent with EPA guidelines, unrounded data are displayed and have been used to calculate % recovery and RPD values. LCS(D) - Laboratory Control Sample (Duplicate) MS(D) - Matrix Spike (Duplicate) DUP - Sample Duplicate RPD- Relative Percent Difference NC - Not Calculable. SG - Silica Gel - Clean -Up U - Indicates the compound was analyzed for, but not detected. Acid preservation may not be appropriate for 2 Chloroethylvinyl ether. A separate vial preserved to a pH of 4-5 is recommended in SW846 Chapter 4 for the analysis of Acrolein and Acrylonitrile by EPA Method 8260. N-Nitrosodiphenylamine decomposes and cannot be separated from Diphenylamine using Method 8270. The result reported for each analyte is a combined concentration. Reported results are not rounded until the final step prior to reporting. Therefore, calculated parameters that are typically reported as "Total" may vary slightly from the sum of the reported component parameters. Pace Analytical is TNI accredited. Contact your Pace PM for the current list of accredited analytes. TNI - The NELAC Institute. REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, Date: 06/26/2023 12:42 PM withoutthe written consent of Pace Analytical Services, LLC. Page 9 of 12 aceAnalytical www.pacelabe.com Pace Analytical Services, LLC 9800 Kincey Ave. Suite 100 Huntersville, NC 28078 (704)875-9092 QUALITY CONTROL DATA CROSS REFERENCE TABLE Project: RESIDENCE AT 9TH LLC Pace Project No.: 92673011 Analytical Lab ID Sample ID QC Batch Method QC Batch Analytical Method Batch 92673011001 C-1 EPA 3010A 781857 EPA 6010D 781882 92673011002 C-2 EPA 3010A 781857 EPA 6010D 781882 92673011001 C-1 EPA 7470A 781883 EPA 7470A 781990 92673011002 C-2 EPA 7470A 781883 EPA 7470A 781990 Date: 06262023 12:42 PM REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, LLC. Page 10 of 12 st Page 11 of 12 DCak -TW9l'E-NV-FAM,-HRUN14063 V01 SAMOle GandItIdn-Upon Ribaialpt nhaam �WO#:92673011 qrj(tOghaif6f,-b6*-,*Jfp or, dach JOrx. Ex vaaflectand _pilojettl rPM: BV Due Date: 06/23/23 t?Icep}lohs VOA, m, CLIENT: 92—HenryNema *4c,Ockpdll vnA.'seVved NltratOtsWOAORO J? T T A v Si 21 4, r E M M 10 Al b 'FD af v- E 'T ul 6 S E a PH Adjustment Log .for �-Preserved SOmplts pR UpOn Adjusted aadaa 7p M.fa- WhA..u.,elh=l�gdlg&ph itwvtiffptkinpNnrih Carollnacnmbliancesemnlei, a cownf.ihi's form;;][[ btim-nttatheT4titthCaraliho'DENR.CerUflcation Office lf.e. Out of hold; incorrect pre$erVptivet outo(ternp IncarteCt tOqtktnarS. Page 12 of 12 ATTACHMENT B USGS PAPER #1270 EXCERPTS Element Concentrations in Soils and Other Surficial Materials of the Conterminous United States U.S. GEOLOGICAL SURVEY PROFESSIONAL PAPER 1270 Element Concentrations in Soils and Other Surficial Materials of the Conterminous United States I'' "Ig :i • U.S. GEOLOGICAL SURVEY PROFESSIONAL PAPER 1270 An account of the concentrations of 50 chemical Elements in samples of soils and other regoliths UNITED STATES GOVERNMENT PRINTING OFFICE, WASHINGTON : 1984 UNITED STATES DEPARTMENT OF THE INTERIOR WILLIAM P. CLARK, Secretary GEOLOGICAL SURVEY Dallas L. Peck, Director Library of Congress Cataloging in Publication Data Shaddette, Hansford T. Element concentrations in soils and other surflcial materials of the conterminous United States. (Geological Survey professional paper ;1270) Bibliography: 105 p. Supt. of Does. No.: 119.16 1. Soils --United States --Composition. I. Boerngen, Josephine G. II. Title. III. Series S699.A1S6 631.4773 82-600084 AACR2 For sale by the Distribution Branch, U.S. Geological Survey, 604 South Pickett Street, Alexandria, VA 22304 CONTENTS Abstract............................................ 1 Introduction.......................................... 1 Acknowledgments....................................... 2 Review of literature ...................................... 2 Collection and analysis of geochemical data ........................ 3 Samplingplan ....................................... 3 Sampling media ...................................... 5 Chemical -analysis procedures .............................. 5 Datapresentation ....................................... 5 Discussionof results ..................................... 7 Referencescited ........................................ 9 ILLUSTRATIONS Page FIGURE 1. Map showing location of sampling sites in the conterminous United States where elements not commonly detected in surficial deposits were found, and the amounts of the elements present ................ 12 2-47. Maps showing element content of surficial materials in the conterminous United States: 2. Aluminum ................................ 14 3. Antimony ................................ 16 4. Arsenic ................................. 18 5. Barium ................................. 20 6. Beryllium ................................ 22 7. Boron .................................. 24 8. Bromine ................................. 26 9. Calcium ........... ...................... 28 10. Carbon (total) ............................. 30 11. Cerium ................................. 32 12. Chromium ................................ 34 13. Cobalt .................................. 36 14. Copper ................................. 38 15. Fluorine ..... ............................ 40 16. Gallium ................................. 42 17. Germanium ............................... 44 18. Iodine .................................. 46 19. Iron ................................... 48 20. Lanthanum ............................... 50 21. Lead ................................... 52 22. Lithium ................................. 54 23. Magnesium ............................... 56 24. Manganese ............................... 58 25. Mercury ................................. 60 26. Molybdenum .............................. 62 27. Neodymium ............................... 64 28. Nickel .................................. 66 29. Niobium ................................. 68 30. Phosphorus ............................... 70 31. Potassium ...... ..... ..................... 72 32. Rubidium ................................ 74 33. Scandium ................................ 76 34. Selenium ................................ 78 35. Silicon .................................. 80 36. Sodium ................................. 82 !l! IV CONTENTS FIGURES 3747. Maps showing element content of surficial materials in the conterminous Page United States: 37. Strontium ................................ 84 38. Sulfur .................................. 86 39. Thorium ................................. 88 40. Tin .... ............................... 90 41. Titanium ................................ 92 42. Uranium ................................. 94 43. Vanadium ................................ 96 44. Ytterbium ................................ 98 45. Yttrium ................................. 100 46. Zinc ................................... 102 47. Zirconium ................................ 104 PW TABLE 1. Average or median contents, and range in contents, reported for elements in soils and other surficial materials .. 4 2. Mean concentrations, deviations, and ranges of elements in samples of soils and other surficial materials in the conterminous UnitedStates......................................................... 6 ELEMENT CONCENTRATIONS IN SOILS AND OTHER SURFICIAL MATERIALS OF THE CONTERMINOUS UNITED STATES By HANSFORD T. SHACKLETTE and JOSEPHINE G. BOERNGEN ABSTRACT Samples of soils or other regoliths, taken at a depth of approxi- mately 20 cm from locations about 80 km apart throughout the conter- minous United States, were analyzed for their content of elements. In this manner, 1,318 sampling sites were chosen, and the results of the sample analyses for 50 elements were plotted on maps. The arithmetic and geometric mean, the geometric deviation, and a histog- ram showing frequencies of analytical values are given for 47 ele- ments. The lower concentrations of some elements (notably, aluminum, barium, calcium, magnesium, potassium, sodium, and strontium) in most samples of surficial materials from the Eastern United States, and the greater abundance of heavy metals in the same materials of the Western United States, indicates a regional geochemical pat- tern of the largest scale. The low concentrations of many elements in soils characterize the Atlantic Coastal Plain. Soils of the Pacific Northwest generally have high concentrations of aluminum, cobalt, iron, scandium, and vanadium, but are low in boron. Soils of the Rocky Mountain region tend to have high concentrations of copper, lead, and zinc. High mercury concentrations in surficial materials are characteristic of Gulf Coast sampling sites and the Atlantic coast sites of Connecticut, Massachuetts, and Maine. At the State level, Florida has the most striking geochemical pattern by having soils that are low in the concentrations of most elements considered in this study. Some smaller patterns of element abundance can be noted, but the degree of confidence in the validity of these patterns decreases as the patterns become less extensive. INTRODUCTION The abundance of certain elements in soils and other surficial materials is determined not only by the ele- ment content of the bedrock or other deposits from which the materials originated, but also by the effects of climatic and biological factors as well as by influences of agricultural and industrial operations that have acted on the materials for various periods of time. The diver- sity of these factors in a large area is expected to result in a corresponding diversity in the element contents of the surficial materials. At the beginning of this study (1961), few data were available on the abundance of elements in surficial ma- terials of the United States as a whole. Most of the early reports discussed only the elements that were of economic importance to mining or agriculture in a metallogenic area or State; and the data, for the most part, cannot be evaluated with reference to average, or normal, amounts in undisturbed materials because they were based on samples of deposits expected to have anomalous amounts of certain elements, or were based only on samples from cultivated fields. We began a sampling program in 1961 that was de- signed to give estimates of the range of element abun- dance in surficial materials that were unaltered or very little altered from their natural condition, and in plants that grew on these deposits, throughout the contermin- ous United States. We believed that analyses of the surficial materials would provide a measure of the total concentrations of the elements that were present at the sampling sites, and that analysis of the plants would give an estimate of the relative concentrations among sites of the elements that existed in a chemical form that was available to plants. Because of the great amount of travel necessary to complete this sampling, we asked geologists and others of the U.S. Geological Survey to assist by collecting samples when traveling to and from their project areas and to contribute appro- priate data they may have collected for other purposes. The reponse to this request, together with the samples and data that we had collected, resulted in our obtain- ing samples of surficial materials and plants from 863 sites. The analyses of surficial materials sampled in this phase of the study were published for 35 elements by plotting element concentrations, in two to five fre- quency classes, on maps (Shacklette, Hamilton, and others, 1971). Soon after the publication of the results of this study, interest in environmental matters, particularly in the effects of contamination and industrial pollution, in- creased greatly. At the same time, technological ad- vances in analytical methods and data processing facili- tated measurements of geochemical and other parame- ters of the environment. In response to the need for background data for concentrations of certain elements of particular environmental concern, the samples of sur- ficial materials that were collected for the first study (Shacklette, Hamilton, and others, 1971) (with some ad- 2 ELEMENT CONCENTRATIONS IN SOILS, CONTERMINOUS UNITED STATES ditional samples) were analyzed for other elements, and the results were published in U.S. Geological Survey Circulars: for mercury, Shacklette, Boerngen, and Turner (1971); for lithium and cadmium, by Shacklette, and others (1973); and for selenium, fluorine, and arse- nic, Shacklette and others (1974). The collection of samples for this study continued, as opportunities arose, until autumn 1975, resulting in the sampling of an additional 355 sites that were selected to give a more uniform geographical coverage of the conterminous United States. This sampling con- tinuation is referred to as phase two. These samples were analyzed, and the data were merged with those of the original samples to produce the results given in the present report. In addition, the availability of analytical methods for elements not included in the ear- lier reports permitted data to be given on these ele- ments in the more recently collected samples. The collection localities and dates, sample descrip- tions, and analytical values for each sample in the pre- sent report were published by Boerngen and Shacklette (1981). The elemental compositions of only the surficial materials are given in this report; the data on analyses of the plant samples are held in files of the U.S. Geolog- ical Survey. ACKNOWLEDGMENTS This study was made possible by the cooperation of many persons in the U.S. Geological Survey. We thank D. F. Davidson, A. T. Miesch, J. J. Connor, R. J. Ebens, and A. T. Myers for their interest in, and con- tinued support of, this study. The sampling plan was suggested by H. L. Cannon, who also contributed analytical data from her project areas and samples from her travel routes. Others of the Geological Survey who collected samples, and to whom we express gratitude, are: J. M. Bowles, F. A. Branson, R. A. Cadigan, F. C. Canney, F. W. Cater, Jr., M. A. Chaffey, Todd Church, J. J. Connor, Dwight Crowder, R. J. Ebens, _T. A. Erdman, G. L. Feder, G. B. Gott, W. R. Griffitts, T. P. Hill, E. K. Jenne, M. I. Kaufman, J. R. Keith, Frank Kleinhampl, A. T. Miesch, R. F. Miller, R. C. Pearson, E. V. Post, Douglas Richman, R. C. Sever- son, James Scott, D. A. Seeland, M. H. Staatz, T. A. Steven, M. H. Strobell, V. E. Swanson, R. R. Tidball, H. A. Tourtelot, J. D. Vine, and R. W. White. We thank the following members of the U.S. Department of Agriculture Soil Conservation Service for providing soil samples from areas in Minnesota: D. D. Barron, C. R. Carlson, D. E. DeMartelaire, R. R. Lewis, Charles Sutton, and Paul Nyberg. We acknowledge the analytical support provided by the following U.S. Geological Survey chemists: Lowell Artis, Philip Aruscavage, A. J. Bartel, S. D. Bott L. A. Bradley, J. W. Budinsky, Alice Caemmerer, P. Cahill, E. Y. Campbell, G. W. Chloe, Don Coi E. F. Cooley, N. M. Conklin, W. B. Crandell, Mauri Devalliere, P. L. D. Elmore, E. J. Finlay, Johni Gardner, J. L. Glenn, T. F. Harms, R. G. Haven R. H. Heidel, M. B. Hinkle, Claude Huffman, Jr., I B. Jenkins, R. J. Knight, B. W. Lanthorn, L. M. Lei K. W. Leong, J. B. McHugh, J. D. Mensik, V. M. Me ritt, H. T. Millard, Jr., Wayne Mountjoy, H. H Nakagawa, H. G. Neiman, Uteana Oda, C. S. E. Pap R. L. Rahill, V. E. Shaw, G. D. Shipley, Hezeki Smith, A. J. Sutton, Jr., J. A. Thomas, Barbara Tobi J. E. Troxel, J. H. Turner, and G. H. VanSickle. We were assisted in computer programming for th data by the following persons of the U.S. Geologid Survey: W. A. Buehrer, G. I. Evenden, J. B. Fifg Allen Popiel, M. R. Roberts, W. C. Schomburg, G. I' Selner, R. C. Terrazas, George VanTrump, Jr., and R. R. Wahl. REVIEW OF LITERATURE The literature on the chemical analysis of soils and other surficial materials in the United States is exteb sive and deals largely with specific agricultural pr& lems of regional interest. Many of the papers were writ ten by soil scientists and chemists associated with State agricultural experiment stations and colleges of agricul ture, and most reports considered only elements that. were known to be nutritive or toxic to plants or ari mals. Chemists with the U.S. Department of Agriculture prepared most early reports of element abundance in soils for large areas of the United States. (See Robin- son, 1914; Robinson and others, 1917). The 1938 yeah book of agriculture was devoted to reports on soils of the United States; in this book, McMurtrey and Robin- son (1938) discussed the importance and abundance of trace elements in soils. Amounts of the major elements in soil samples from a few soil profiles distributed throughout the United States were compiled by the soil scientist C. F. Marbut (1935) to illustrate characteris- tics of soil units. The use of soil analysis in geochemical prospecting began in this country in the 1940's, and many reports were published on the element amounts in soils from areas where mineral deposits were known or suspected to occur. Most of these reports included only a few ele- ments in soils from small areas. This early geochemical work was discussed by Webb (1953) and by Hawkes (1957). In succeeding years, as soil analyses became an accepted method of prospecting and as analytical COLLECTION AND ANALYSIS OF GEOCHEMICAL DATA 3 methods were improved, many elements in soils were analyzed; still, the areas studied were commonly small. An estimate of the amounts of elements in average, or normal, soils is useful in appraising the amounts of elements in a soil sample as related to agricultural, min- eral prospecting, environmental quality, and health and disease investigations. Swain (1955) gave an extensive bibliography of trace -element reports on soils of the world, and he also summarized reports of the average amounts of elements as given by several investigators. The most comprehensive list of average amounts of rare and dispersed elements in soils is that of Vinogradov (1959), who reported the analytical results of extensive studies of soils in the Union of Soviet Socialist Repub- lics, as well as analyses of soils from other countries. He did not state the basis upon which he established the average values; however, these values are presuma- bly the arithmetic means of element amounts in samples from throughout the world. In their discussions of the principles of geochemistry, Goldschmidt (1954) and Rankama and Sahama (1955) reported the amounts of various elements present in soils and in other surficial materials, Hawks and Webb (1962) and, more recently, Brooks (1972), Siegal (1974), Levinson (1974), and Rose and others (1979) gave average amounts of certain ele- ments in soils as useful guides in mineral exploration. A report on the chemical characteristics of soils was edited by Bear (1964). In this book, the chapter on chemical composition of soils by Jackson (1964) and the chapter on trace elements in soils by Mitchell (1964) gave the ranges in values or the average amounts of some soil elements. Regional geochemical studies conducted by scientists of the U.S. Geological Survey within the past two de- cades have been largely directed to the establishment of baseline abundances of elements in surficial mate- rials, including soils. Most of the earlier work investi- gated these materials that occurred in their natural con- dition, having little or no alterations that related to human activities, with the objective of establishing nor- mal element concentrations in the materials by which anomalous concentrations, both natural or man induced, could be judged. Some of these studies were conducted in cooperation with medical investigators who were searching for possible relationships of epidemiological patterns to characteristics of the environment. In one study, the geochemical characteristics of both natural and cultivated soils were determined in two areas of Georgia that had contrasting rates of cardiovascular dis- eases (Shacklette and others, 1970). In an extensive geochemical study of Missouri, also conducted coopera- tively with medical researchers, both cultivated and natural soils were sampled. The results were presented for the State as a whole, and for physiographic regions or other subdivisions and smaller areas, as follows: Erdman and others (1976a, 1976b); Tidball (1976, 1983a, 1983b); and Ebens and others (1973). The results of these studies, and of other regional geochemical investi- gations, were summarized and tabulated by Connor and Shacklette (1975). Recent regional studies of soil geochemistry by the U.S. Geological Survey related to the development of energy resources in the western part of the United States, including North Dakota, South Dakota, Mon- tana, Wyoming, Colorado, Utah, and New Mexico. These studies established regional geochemical baselines for soils, both in undisturbed areas and in areas that had been altered by mining and related ac- tivities. Some of these studies considered the elements in soils both as total concentrations and as concentra- tions that were available to plants of the region. The results of these studies were published in annual prog- ress reports (U.S. Geological Survey, 1974, 1975, 1976, 1977, and 1978). The data on soils, as well as on other natural materials, in these reports were summarized and tabulated by Ebens and Shacklette (1981). In a study of the elements in fruits and vegetables from 11 areas of commercial production in the United States, and in the soils on which this produce grew, soils were analyzed for 39 elements, as reported by Boerngen and Shacklette (1980) and Shacklette (1980). The average amounts of elements in soils and other surficial materials of the United States, as determined in the present study, are given in table 1, with the average values or ranges in values that were reported by Vinogradov (1959), Rose and others (1979), Jackson (1964), Mitchell (1964), and Brooks (1972). The averages from the present study given in table 1 are the arithme- tic means. Although the averages were computed by the methods described by Miesch (1967), the values ob- tained are directly comparable with the arithmetic means derived by common computational procedures. COLLECTION AND ANALYSIS OF GEOCHEMICAL DATA SAMPLING PLAN The sampling plan was designed with the emphasis on practicality, in keeping with the expenditures of time and funds available, and its variance from an ideal plan has been . recognized from the beginning. Because the collection of most samples was, by necessity, incidental to other duties of the samplers, the instructions for sampling were simplified as much as possible, so that sampling methods would be consistent within the wide range of kinds of sites to be sampled. The samples were 4 ELEMENT CONCENTRATIONS IN SOILS, CONTERMINOUS UNITED STATES TABLE 1.-Average or median contents, and mange in contents, reported for elements in soils and other surficial materials [Dab are m parts per million; each average represents arithmetic mean; leaders (-) in figure columns indicate no data available. A, average; X, median. <, less than; >, greater than] This report Rose, (1979) and others (elements Vinogradov (1959) Jackson (1964) Mitchell (1964) Brooks (1972) useful in (presumably, Element geochemical averages from "Typical",' Range in prospecting) worldwide average, contents in Average Range sampling) or range Scottish sur- Average or in values face soils range Al--- 72,000 700 - �(10,000 ---- ---------------- 71,300 10,000 - 60,000 ------ ------ ---- - ---------- ------ As----- 7.2 <0.1 - 97 7.5 (M) 5- ------------ - ----------- ----------- 5 B--- 33 <20 - 300 29 (M) 10 30 ----------------- 10 Be------ 580 10 - 5,000 300 (M) ---------------- ------------- 400 - 3,000 500 Be----- .92 <1 - 15 0.5 - 4 6------------------- <5 - 5 6 Br----- .85 <0.5 - 11 -------------------- - 5 ------------- -------- --------- ----- ------- ----------- C, total 25,000 600 - 370,000 ----------- ----------- 20,000---------------- ------- ---- ---- Ca ------ 24,000 100 - 320,000 ----------------- ----- 13,700 7,000 -------- ------------------------ Ce-- 75 <150 - 300 ------------------------------------------------------------------------------------------- Co--- 9.1 <3 - 70 10 (M) 8------ ----------- <2 - 80 10 Cr------ 54 1 - 2,000 6.3 (M) 200------------------- 5 - 3,000 200 Cu------ 25 <1 - 700 15 (M) 20 20 <10 - 100 20 F------ 430 <10 - 3,700 300 (M) 200 ----------------------------------------------------- Fe---- 26,000 100 - >100,000 21,000 (M) 38,000 7,000 - 42,000 10,000 - 50,000 Ga----- 17 <5 - 70 ---------------------- 30------------- ----- 15 - 70 20 Ge---- 1.2 <0.1 - 2.5 ------ ---------------- 1------------------------- --------------- 5 Ng----- .09 <0.01 - 4.6 0.056 (M) ------------------------- - ---------- ---------- .01 1------ 1.2 <0.5 - 9.6 -- -------------- ---------------------- ---------- ------------- ------- ----- -------- ------- -- K------ 15,000 50 - 63,000 11,000 (M) 13,600 400 - 28,000 ----- - -------- -_- --- -------- -___ La---- 37 <30 - 200-------------------- ----------------------- ---------------- <30 - 200 ------------- Li----- 24 <5 - 140 6.2 (M) 30---------------- ----------- ------ ----- 30 Mg---- 9,000 50 - >100,000---------------- ----- 6,300 <6,000 -------------------------------- Mn------ 550 <2 - 7,000 320 (M) 850------------------- 200 - 5,000 850 Mo------ .97 <3 - 15 2.5 (A) 2------- -------- -- <1 - 5 2.5 Na------ 12,000 <500 - 100,000 ----------------------- 6,300 ------------------------------- ------ --------- --------- Nb--- 11 <10 - 100 15 (A) ------------------ -- ------ -- --------- - ---------- --- 15 Nd------ 46 <70 - 300 --------------------------------------------------------------------------------------------------- Ni----- 19 <5 - 700 17 (M) 40----- ----------- 10 - 800 40 P------ 430 <20 - 6,800 300 (M) 800 500 ------------------------------------ Pb----- 19 <10 - 700 17 (M) ------- ---------- ----------------- <20 - 80 10 Rb------ 67 <20 - 210 35 (M) 100 ----- ----------------------- --------- ----- ------------ S, total 1,600 <800 - 48,000 100 - 2,000 850 ------- ------------- --------- - ---- ---------------- Sb------ .66 <1 - 8.8 2 (A) ---------------- ----------------------- - ----- --------- .5 Sc---- 8.9 <5 - 50-------------------- -- 7 -------- --------- <3 - 15 ------------- Se----- .39 <0.1 - 4.3 0.31 (M) .001------ ---- --------------- ----- ---- .5 Si----- 310,000 16,000 - 450,000----------------------- 330,000 ----- ----------------------- ----- ---- --------------- Sn------ 1.3 <0.1 - 10 10 (A) --------------------------------------------------------- 10 Sr----- 240 <5 - 3,000 67 (M) 300------------ ----- 60 - 700 300 Ti----- 2,900 70 - 20,000----------------------- 4,600 1,200 - 6,000 ------------------------------------ Th------ 9.4 2.2 - 31----------------------------------------------- --------- ------------------ ----- 13 0------- 2.7 0.29 - 11 1 (A) ----------------------------------------- -------------- - 1 V------- 80 <7 - 500 57 (M) 100----------------- 20 - 250 100 Y------- 25 <10 - 200---- ------------------ 50-------- ------- -- 25 - 100 ----- ---------- Yb------ 3.1 <1 - 50 ----------- ------------------- ------- --- ------------------- ------ ----- ----- -------------- Zn------ 60 <5 - 2,900 36 (M) 50----- ------------ - ----------------- - 50 Zr------ 230 <20 - 2,000 270 (M) 300--------- ---- ---- 200 - >1,000 ---------------- ]Author's usage; generally used to indicate the most commonly occurring value. collected by U. S. Geological Survey personnel along their routes of travel to areas of other types of field studies or within their project areas. The locations of the routes that were sampled de- pended on both the network of roads that existed and the destinations of the samplers. Sampling intensity was kept at a minimum by selecting only one sampling site every 80 km (about 50 miles; selected for conveni- ence because vehicle odometers were calibrated in miles) along the routes. The specific sampling sites were selected, insofar as possible, that had surficial ma- terials that were very little altered from their natural condition and that supported native plants suitable for sampling. In practice, this site selection necessitated sampling away from roadcuts and fills. In some areas, only cultivated fields and plants were available for sam- pling. Contamination of the sampling sites by vehicular emissions was seemingly insignificant, even though many sites were within 100 m or less of the roads. Col- DATA PRESENTATION lecting samples at about 20 cm depth, rather than at the upper soil horizons, . may have avoided the effects of surface contamination on the samples. However, we had no adequate way of measuring any contamination that may have occurred. (See Cannon and Bowles, 1962.) Many of the sampled routes had only light veh- icular traffic, and some were new interstate highways. Routes through congested areas generally were not sampled; therefore, no gross contamination of the sam- ples was expected. The study areas that were sampled follow: Wisconsin and parts of contiguous States, southeastern Missouri, Georgia, and Kentucky, sampled by Shacklette; Ken- tucky, sampled by J. J. Connor and R. R. Tidball; Nevada, New Mexico, and Maryland, sampled by H. L. Cannon; various locations in Arizona, Colorado, Mon- tana, New Mexico, Utah, and Wyoming, sampled by F. A. Branson and R. F. Miller; Missouri, sampled by Shacklette, J. A. Erdman, J. R. Keith, and R. R. Tid- ball; and various locations in Colorado, Idaho, Montana, South Dakota, Utah, and Wyoming, sampled by A. T. Miesch and J. J. Connor. Sampling techniques used in these areas varied according to the primary objectives of the studies being conducted, but generally these techniques were closely similar to the methods used in sampling along the roads. In general, the sampling within study areas was more intensive than that along the travel routes. To make the sampling intensity of the two sampling programs more nearly equal, only the samples from selected sites in the study areas were used for this report. The selected sites were approximately 80 km apart. Where two or more samples were collected from one site, they were assigned numbers, and one of these samples was randomly chosen for evaluation in this study. SAMPLING MEDIA The material sampled at most sites could be termed "soil" because it was a mixture of comminuted rock and organic matter, it supported ordinary land plants, and it doubtless contained a rich microbiota. Some of the sampled deposits, however, were not soils as defined above, but were other kinds of regoliths. The regoliths included desert sands, sand dunes, some loess deposits, and beach and alluvial deposits that contained little or no visible organic matter. In some places the distinc- tions between soils and other regoliths are vague be- cause the materials of the deposits are transitional be- tween the two. Samples were collected from a few de- posits consisting mostly of organic materials that would ordinarily be classified as peat, rather than soil. To unify sampling techniques, the samplers were asked to collect the samples at a depth of approximately 20 cm below the surface of the deposits. This depth was chosen as our estimate of a depth below the plow zone that would include parts of the zone of illuviation in most well -developed zonal soils, and as a convenient depth for sampling other surficial materials. Where the thickness of the material was less than 20 cm, as in shallow soils over bedrock or in lithosols over large rock fragments, samples were taken of the material that lay iust above the rock deposits. About 0.25 liter of this material was collected, put in a kraft paper envelope, and shipped to the U.S. Geological Survey laboratories in Denver, Colo. CHEMICAL -ANALYSIS PROCEDURES The soil samples were oven dried in the laboratory and then sifted through a 2-mm sieve. If the soil mate- rial would not pass this sieve, the sample was pul- verized in a ceramic mill before seiving. Finally, the sifted, minus 2-mm fraction of the sample was used for analysis. The methods of analysis used for some elements were changed during the course of this study, as new tech- niques and instruments became available. For most ele- ments, the results published in the first report (Shacklette, Hamilton, and others, 1971) were obtained by use of a semiquantitative six -step emission spec- trographic method (Meyers and others, 1961). The methods used for other elements were: EDTA titration for calcium; colorimetric (Ward and others, 1963) for phosphorus and zinc; and flame photometry for potassi- um. Many of the elements analyzed in the 355 samples collected in phase two of the study were also analyzed by the emission spectrographic method (Neiman, 1976). Other methods were used for the following elements: flame atomic absorption (Huffman and Dinnin, 1976) for mercury, lithium, magnesium, sodium, rubidium, and zinc; flameless atomic absorption (Vaughn, 1967) for mercury; X-ray fluorescence spectrometry (Wahlberg, 1976) for calcium, germanium, iron, potassium, seleni- um, silver, sulfur, and titanium; combustion (Huffman and Dinnin, 1976) for total carbon; and neutron activa- tion (Millard, 1975, 1976) for thorium and uranium. DATA PRESENTATION Summary data for 46 elements are reported in tables 1 and 2. In table 1, the element concentrations found in samples of soil and other surficial materials of this study are compared with those in soils reported in other studies. Arithmetic means are used for the data of this study to make them more readily compared with the data generally reported in the literature. These arith- metic means were derived from the estimated geomet- ric means by using a technique described by Miesch (1967), which is based on methods devised by Cohen (1959) and Sichel (1952). The arithmetic means in table 6 ELEMENT CONCENTRATIONS IN SOILS, CONTERMINOUS UNITED STATES 1, unlike the geometric means shown in table 2, are estimates of geochemical abundance (Miesch, 1967). Arithmetic means are always larger than corresponding geometric means (Miesch, 1967, p. B1) and are esti- mates of the fractional part of a single specimen that consists of the element of concern rather than of the typical concentration of the element in a suite of sam- ples. Concentrations of 46 elements in samples of this study are presented in table 2, which gives the determi- nation ratios, geometric -mean concentrations and devia- tions, and observed ranges in concentrations. The analytical data for most elements as received from the laboratories were transformed into logarithms because of the tendency for elements in natural materials, par- ticularly the trace elements, to have positively skewed TABLE 2. Mean concentrations, deviations, and ranges of elements in samples of soils and other surfteial materials in the conterminous United States [Means and ranges are reported in parts per mdhon (µft), and means and deviations are geometric except as indicated. Ratio, number of samples in which the element was found in measurable concentrations to number of samples analyzed. <, less than; >, greater than] Conterminous Western United States Eastern United States United States (west of 96th meridian) (east of 96th meridian) Element Estimated Estimated Estimated Devia- arithmetic Devia- Observed arithmetic Devi a- Observed arithmetic Mean tion mean Ratio Mean tion range mean Ratio Mean tion -range mean Al, percent 4.7 2.48 7.2 661:770 5.8 2.00 0.5 - >10 7.4 450:477 3.3 2.87 0.7 - >10 5.7 As--------- 5.2 2.23 7.2 728:730 5.5 1.98 <0.10 - 97 7.0 521:527 4.8 2.56 <0.1 - 73 7.4 B---------- 26 1.97 33 506:778 23 1.99 <20 - 300 29 425:541 31 1.88 <20 - 150 38 Ba--------- 440 2.14 580 778:778 580 1.72 70 - 5,000 670 541:541 290 - 2.35 10 - 1,500 420 Be--------- .63 2.38 .92 310:778 .68 2.30 <1 - 15 .97 169:525 .55 2.53 <1 - 7 .85 Br--------- 56 2.50 .85 113:220 .52 2.74 <0.5 - 11 .86 78:128 .62 2.18 <0.5 - 5.3 .85 C, percent- 1.6 2.57 2.5 250:250 1.7 2.37 0.16 - 10 2.5 162:162 1.5 2.88 0.06 - 37 2.6 Ca, percent .92 4.00 2.4 777:777 1.8 3.05 0.06 - 32 3.3 514:514 .34 3.08 0.01 - 28 .63 Ce-------- 63 1.78 75 81:683 65 1.71 <150 - 300 75 70:489 63 1.85 <150 - 300 76 Co--------- 6.7 2.19 9.1 698:778 7.1 1.97 <3 - 50 9.0 403:533 5.9 2.57 <0.3 - 70 9.2 Cr--------- 37 2.37 54 778*778 41 2.19 3 - 2,000 56 541:541 33 2.60 1 - 1,000 52 Cu--------- 17 2.44 25 778:778 21 2.07 2 - 300 27 523:533 13 2.80 <1 - 700 22 F---------- 210 3.34 430 598:610 280 2.52 <10 - 1,900 440 390*435 130 4.19 <10 - 3,700 360 Fe, percent 1.8 2.38 2.6 776:777 2.1 1.95 0.1 - >10 2.6 539:540 1.4 2.87 0.01 - >10 2.5 Ga--------- 13 2.03 17 767:776 16 1.68 <5 - 70 19 431:540 9.3 2.38 <5 - 70 14 Ge--------- 1.2 1.37 1.2 224:224 1.2 1.32 0.58 - 2.5 1.2 130:131 1.1 1.45 <0.1 - 2.0 1.2 Hg--------- .058 2.52 .089 729:733 .046 2.33 <0.01 - 4.6 .065 534:534 .081 2.52 0.01 - 3.4 .12 I--------- 75 2.63 1.2 169:246 .79 2.55 <0.5 - 9.6 1.2 90:153 .68 2.81 <0.5 - 7.0 1.2 K, percentl 1.5 .79 None 777:777 1.8 .71 0.19 - 6.3 None 537:537 1.2 1.75 0.005 - 3.7 -- La-------- 30 1.92 37 462:777 30 1.89 <30 - 200 37 294:516 29 1.98 <30 - 200 37 L1-------- 20 1.85 24 731:731 22 1.58 5 - 130 25 479:527 17 2.16 <5 - 140 22 Mg, percent .44 3.28 .90 777:778 .74 2.21 0.03 - >10 1.0 528:528 .21 3.55 0.005 - 5 .46 Mn--------- 330 2.77 550 777:777 380 1.98 30 - 5,000 480 537:540 260 3.82 <2 - 7,000 640 Mo--------- .59 2.72 .97 57:774 .85 2.17 <3 - 7 1.1 32:524 .32 3.93 <3 - 15 .79 Na, percent .59 3.27 1.2 744:744 .97 1.95 0.05 - 10 1.2 363:449 .25 4.55 <0.05 - 5 .78 Nb--------- 9.3 1.75 11 418:771 8.7 1.82 <10 - 100 10 322:498 10 1.65 <10 - 50 12 Nd--------- 40 1.68 46 120:538 36 1.76 <70 - 300 43 109:332 46 1.58 <70 - 300 51 Ni-------- 13 2.31 19 747:778 15 2.10 <5 - 700 19 443:540 11 2.64 <5 - 700 18 P-------- 260 2.67 430 524:524 120 2.33 40 - 4,500 460 380:382 200 2.95 <20 - 6,800 360 Pb--------- 16 1.86 19 712:778 17 1.80 <10 - 700 20 422:541 14 1.95 <10 - 300 17 Rb--------- 58 1.72 67 221:224 69 1.50 <20 - 210 74 107:131 43 1.94 <20 - 160 53 S, percent- .12 2.04 .16 34:224 .13 2.37 <0.08 - 4.8 .19 20:131 .10 1.34 <0.08 - 0.31 .11 Sb--------- .48 2.27 .67 35:223 .47 2.15 <1 - 2.6 .62 31:131 .52 2.38 <l - 8.8 .76 Sc--------- 7.5 1.82 8.9 685:778 8.2 1.74 <5 - 50 9.6 389:526 6.5 1.90 <5 - 30 8.0 Se--------- .26 2.46 .39 590:733 .23 2.43 <0.1 - 4.3 .34 449:534 .30 2.44 <0.1 - 3.9 .45 Si, percentl 31 6.48 None 250:250 30 5.70 15 - 44 None 156:156 34 6.64 1.7 - 45 -- Sn----- --- .89 2.36 1.3 218:224 .90 2.11 <0.1 - 7.4 1.2 123:131 .86 2.81 <0.1 - 10 1.5 Sr--------- 120 3.30 240 778:778 200 2.16 10 - 3,000 270 501:540 53 3.61 <5 - 700 120 Ti, percent .24 1.89 .29 777:777 .22 1.78 0.05 - 2.0 .26 540:540 .28 2.00 0.007 - 1.5 .35 Th--------- 8.6 1.53 9.4 195:195 9.1 1.49 2.4 - 31 9.8 102:102 7.7 1.58 2.2 - 23 8.6 U--------- 2.3 1.73 2.7 224:224 2.5 1.45 0.68 - 7.9 2.7 130:130 2.1 2.12 0.29 - 11 2.7 V------ --- 58 2.25 80 778:778 70 1.95 7 - 500 88 516:541 43 2.51 <7 - 300 66 Y--------- 21 1.78 25 759.778 22 1.66 <10 - 150 25 477:541 20 1.97 <10 - 200 25 Yb--------- 2.6 1.79 3.1 754:764 2.6 1.63 <1 - 20 3.0 452:486 2.6 2.06 <1 - 50 3.3 Zn--------- 48 1.95 60 766:766 55 1.79 10 - 2,100 65 473:482 40 2.11 <5 - 2,900 52 Zr--------- 180 1.91 230 777:778 160 1.77 <20 - 1,500 190 539:541 220 2.01 <20 - 2,000 290 1Means are arithmetic, deviations are standard. DISCUSSION OF RESULTS 7 frequency distributions. For this reason, the geometric mean is the more proper measure of central tendency for these elements. The frequency distributions for po- tassium and silicon, on the other hand, are more nearly normal if the data are not transformed to logarithms and the mean is expressed as the arithmetic average. In geochemical background studies, the magnitude of scatter to be expected around the mean is as important as the mean. In lognormal distributions, the geometric deviation measures this scatter, and this deviation may be used to estimate the range of variation expected for an element in the material being studied. About 68 per- cent of the samples in a randomly selected suite should fall within the limits MID and M-D, where M repre- sents the geometric mean and D the geometric devia- tion. About 95 percent should fall between M/D2 and M•D2, and about 99.7 percent between MID' and MV. The analytical data for some elements include values that are below, or above, the limits of numerical deter- mination, and these values are expressed as less than (<) or greater than (>) a stated value. These data are said to be censored, and for these the mean was com- puted by using a technique described by Cohen (1959) and applied to geochemical studies by Miesch (1967). This technique requires an adjustment of the summary statistics computed for the noncensored part of the data. The censoring may be so severe in certain sets of data that a reliable adjustment cannot be made; with the data sets used in the present study, however, no such circumstances were encountered. The use of these procedures in censored data to quantify the central ten- dency may result in estimates of the mean that are lower than the limit of determination. For example, in table 2 the geometric -mean molybdenum concentration in soils from the Eastern United States is estimated to be 0.32 ppm, although the lower limit of determina- tion of the analytical method that was used is 3 ppm. Use of this procedure permits inclusion of the censored values in the calculation of expected mean concentra- tions. The determination ratios in table 2—that is, the ratio of the number of samples in which the element was found in measurable concentrations to the total number of samples —permit the number of censored values, if any, to be found that were used in calculating the mean. This number is found by subtracting the left value in the ratio from the right. The distribution of the sampling sites and the concen- trations of elements determined for samples from the sites are presented on maps of the conterminous United States (figs. 1-47). Figure 1 shows the locations of sites where four elements, bismuth, cadmium, praseodymi- um, and silver, were found in the samples. These ele- ments were determined too uncommonly for reliable mean concentrations to be calculated. Each of the re- maining maps (figs. 2 47) gives the locations where an element was found in a sample from a site and the con- centration of the element, shown by a symbol that rep- resents a class of values. By examining the tables of frequency for concentration values of the elements, we were able to divide the ranges of reported values for many elements into five classes so that approximately 20 percent of the values fell into each class. The limited range in values for some elements, however, prohibited the use of more than two or three classes to represent the total distribution. Symbols representing the classes were drawn on the maps by an automatic plotter that was guided by computer classification of the data, in- cluding the latitude and longitude of the sampling sites. A histogram on each map gives the frequency distribu- tion of the analytical values, and the assignment of analytical values to each class as represented by sym- bols. We were able to obtain analyses of 11 more elements for the 355 samples of phase two of this study than for the 963 samples of phase one because of improved analytical methods and services. These elements are an- timony, bromine, carbon, germanium, iodine, rubidium, silicon, sulfur, thorium, tin, and uranium. The con- straints of resources and time prohibited analysis of the 963 samples of the first phase for these additional ele- ments. Results of analysis of the plant samples that were collected at all soil -sampling sites are not pre- sented in this report. Some elements were looked for in all samples but were not found. These elements, analyzed by the semiquantitative spectrographic method, and their ap- proximate lower detection limits, in parts per million, are as follows: gold, 20; hafnium, 100; indium, 10; plati- num, 30; palladium, 1; rhenium, 30; tantalum, 200; tQllu- rium, 2,000; and thallium, 50. If lanthanum or cerium were found in a sample, the following elements, with their stated lower detection limits, were looked for in the same sample but were not found: dysprosium, 50; erbium, 50; gadolinium, 50; holmium, 20; lutetium, 30; terbium, 300; and thulium, 20. DISCUSSION OF RESULTS The data presented in this report may reveal evi- dence of regional variations in abundances of elements in soils or other regoliths; single values or small clusters of values on the maps may have little significance if considered alone. Apparent differences in values shown between certain sampling routes, such as some of those across the Great Plains and the North Central States where high values for cerium, cobalt, gallium, and lead predominate, suggest the possibility of systematic er- 8 ELEMENT CONCENTRATIONS IN SOILS, CONTERMINOUS UNITED STATES rors in sampling or in laboratory analysis. Some gross patterns and some of lesser scale, nevertheless, are evi- dent in the compositional variation of regoliths, as shown in figures 247. The lower abundances of some elements (notably alu- minum, barium, calcium, magnesium, potassium, sodi- um, and strontium) in regoliths of the Eastern United States, and the greater abundances of the heavy metals in the same materials of the Western United States indicate a regional pattern of the largest scale. This visual observation of the maps can be substantiated by examining the mean concentrations for these two re- gions given in table 2. The abundances of these ele- ments differ markedly on either side of a line extending from western Minnesota southward through east -cen- tral Texas. This line is generally from the 96th to 97th meridian, and corresponds to the boundary proposed by Marbut (1935, p. 14), which divides soils of the United States into two major groups —the pedalfers that lie to the east, and the pedocals to the west. Mar - but (1928) attributed the major differences in chemical and physical qualities of these two major groups to the effects of climate on soils. A line approximating the 96th meridian also separates the Orders, Suborders, and Great Groups of moist -to -wet soils in the Eastern United States from the same categories of dry soils that He to the west, as mapped by the [U.S.] Soil Conserva- tion Service (1969). As shown in table 2, soils of the Western United States have the highest mean values for all elements considered in this report except for an- timony, boron, bromine, mercury, neodymium, seleni- um, titanium, and zirconium. The differences, however, probably are not significant for these latter elements, except for zirconium. Superimposed upon this large-scale compositional variation pattern are several features of intermediate scale. Perhaps the most notable of these are the low concentrations of many elements in soils of the Atlantic Coastal Plain. Soils of the Pacific Northwest are high in concentrations of aluminum, cobalt, iron, scandium, and vanadium, but low in boron, and soils of the Rocky Mountain region tend to be high in copper, lead, and zinc. Several small-scale patterns of compositional varia- tion can be noted, among them the high mercury con- centrations in surficial materials from the Gulf Coast of eastern Texas, Louisiana, Mississippi, Alabama, and northwest Florida, and a similar pattern on the Atlantic Coast in Connecticut, Massachusetts, and Maine. High phosphorus values occur in soils along a line extending west across Utah and Nevada to the coast of California, then south-east in California and Arizona. At the State level, Florida shows the most striking pattern by hav- ing low soil concentrations of most of the elements con- sidered in this study. The concentrations of certain elements do not show well-defined patterns of distribution, and the regional concentrations of some other elements cannot be evaluated because they were not present in detectable amounts in most of the samples, or because the sam- pling density was insufficient. The degree of confidence in regional patterns of element abundance is expected to be in direct proportion to the number of samples analyzed from the region. As the observed patterns be- come smaller, the probability increases that the charac- teristics that form the patterns are the results of chance. Some features of element -abundance patterns proba- bly reflect geologic characteristics of the areas that the soils overlie. Samples from most of the regoliths overly- ing basic volcanic rocks of Washington and Oregon con- tained higher than average concentrations of iron and other elements, as mentioned earlier. A few soil sam- ples with high phosphorus content are associated with phosphate deposits in Florida, and a single sample in Michigan with high copper content is known to be of soil that occurs over a copper deposit. These data do not provide obvious evidences of north - south trends in elemental compositions that might be expected to relate to differences in temperature re- gimes under which the surficial materials developed. There is, moreover, no consistent evidence of signifi- cant differences in element abundances between glaciated and nonglaciated areas (the general area of continental glaciation includes the northern tier of States from Montana to Maine and south in places to about lat 40°N.; see fig. 1). The world averages of abundance for some elements in soils, as given by Vinogradov (1959) and by others (table 1), do not correspond to the averages of abun- dance for these elements in the soils of the United States, according to the data presented in this report. The world averages are too low for the concentrations of boron, calcium, cerium, lead, magnesium, potassium, and sodium in United States soils and other surficial materials, and too high for beryllium, chromium, galli- um, manganese, nickel, phosphorus, titanium, vanadi- um, and yttrium. The stability of values for concentrations of most ele- ments seems to be satisfactory because the addition of analytical values for 355 samples of phase two of the study to values for 963 samples of the first phase did not significantly change the geometric means and devia- tions of element abundance that were reported earlier (Shacklette, Boerngen, and Turner, 1971; Shacklette, Hamilton, and others, 1971; Shacklette and others, REFERENCES CITED til 1973, 1974). Although additional sampling of the same type as reported here might give a clearer picture of small -to -intermediate element -abundance patterns, mean values reported herein most likely would not change significantly. 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