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HomeMy WebLinkAboutReports - Soils - 07/19/2024 Limited Site Investigation Report College and Drake 2601 South College Avenue Fort Collins, Larimer County, Colorado July 19, 20241 Project No. 20237116 s Prepared for: ` Kentro Group 1509 York Street, Suite 201 +.r_ Denver, Colorado Bloom w Ferracon Explore with us Nationwide Facilities an Environmental ■ Geotechnical Terracon.com ■ Material, 1901 Sharp Point Dr Ste C Terracon Fort Collins, C9 0-484-0359 P 970-484-0359 F 970-484-0454 Terracon.com July 19, 2024 Kentro Group 1509 York Street, Suite 201 Denver, Colorado 80206-1408 Attn: Mr. Elliot Smith (303) 390-1575 es@kentrogroup.com Re: Limited Site Investigation College and Drake 2601 South College Avenue Fort Collins, Larimer County, Colorado Terracon Project No. 20237116 Dear Mr. Smith: Terracon Consultants, Inc. (Terracon) is pleased to submit our report of Limited Site Investigation (LSI) activities completed at the site referenced above. Terracon conducted the LSI in general accordance with our proposal P20237116, Revision 1, dated June 11, 2024. Terracon appreciates this opportunity to provide environmental consulting services to Kentro Group. Should you have any questions or require additional information, please contact our office. Sincerely, Terracon Consultants, Inc. Jordan D. Goff, P.G. Kevin R. Saylor, P.E. Project Geologist Senior Project Engineer Enclosure Limited Site Investigation Terracon College and Drake I Fort Collins, Colorado July 19, 2024 1 Terracon Project No. 20237116 Executive Summary This Limited Site Investigation (LSI) was performed in general accordance with the Scope of Services outlined in the Terracon Consultants, Inc. (Terracon) Proposal No. P20237116 dated June 11, 2024. A total of three soil borings and three soil vapor points were installed at the site to evaluate potential releases associated with the identified recognized environmental conditions (RECs) in the Phase I Environmental Site Assessment (ESA) conducted by Terracon (ESA Report 20237100, dated October 13, 2023). The objective of this LSI is to evaluate soil gas conditions in areas most likely to be impacted based on the previously identified RECs and site operations. Previous groundwater samples collected by others contained concentrations of chloroform and ethylbenzene above Residential Vapor Intrusion Screening Levels (VISLs). Subsurface-soil vapor samples were collected and analyzed in accordance with the procedures outlined in Section 3. A summary of our "Findings, Conclusions, and Recommendations" is provided below. It should be recognized that details of the LSI were not included or fully developed in these sections, and the report must be read in its entirety for a comprehensive understanding of the items contained herein. Findings A summary of findings is provided below. It should be recognized that details were not included or fully developed in this section, and the report must be read in its entirety for a comprehensive understanding of the items contained herein. The lithology encountered at the site generally consisted of asphalt and/or fill material at the surface underlain by a soft to stiff clay and silt to 5 feet below ground surface (bgs). Although groundwater was not encountered in the borings installed during this investigation, the Phase II Environmental Site Assessment previously conducted on the site by others indicated that groundwater was encountered at approximately 12 feet bgs. Soil staining and petroleum odors were observed in the soil collected from borings SGP-1 and SGP-2. Soil gas samples from the borings were analyzed at the laboratory for volatile organic compounds (VOCs). Each analyte was compared to the Environmental Protection Agency (EPA) Vapor Intrusion Screening Level (VISL) which contemplates the EPA Indoor Air Regional Screening Levels (RSLs). Elevated concentrations of benzene, bromodichloromethane, chloroform, 1,2- dichloroethane, and tetrachloroethene are present in the soil gas on the site. The reported Facilities I Environmental I Geotechnical I Materials i Limited Site Investigation �r Terracon College and Drake I Fort Collins, Colorado July 19, 2024 1 Terracon Project No. 20237116 concentrations are above the VISLs for commercial and/or residential use; the proposed use of the site is for both residential and commercial occupancy. Based on field observations and soil gas analytical results, a vapor intrusion risk has been identified at the site for residential and commercial use. Recommendations The Scope of this LSI was intended to assess presence/absence of environmental impacts based upon the information developed during the project. The Scope was limited to what is presented in the proposal and, as such, was not intended to address the magnitude or extent of environmental impacts. Furthermore, the scope of this investigation was intended to evaluate potential impact in the northwest area of the site and did not include the remainder of the site. It is our understanding that the site will be developed in the future for residential and commercial use. Based on the review of analytical results from soil gas samples collected during this LSI, a properly designed passive vapor mitigation system (VMS) is recommended for the future building in the area investigated during this LSI. For proposed buildings in other areas of the site, the client may consider further investigation of the soil gas in the footprint of the proposed buildings to evaluate if a VMS is warranted for those buildings. If additional investigation is not performed, then Terracon recommends incorporating a VMS into proposed buildings in areas of the site that were not investigated. Given that impacted media encountered during the prior Phase II ESA on the site, preparation of a materials management plan (MMP) is recommended to manage potentially impacted soil that may be encountered and to protect workers during future construction activities. Facilities I Environmental I Geotechnical I Materials ii Limited Site Investigation „�li ierrac©n College and Drake I Fort Collins, Colorado July 19, 2024 1 Terracon Project No. 20237116 Table of Contents Executive Summary.......................................................................... i Findings ................................................................................................... i Conclusions ..............................................................................................ii Recommendations......................................................................................ii 1.0 Site Description and Background Information .............................. 1 1.1 Standard of Care............................................................................. 1 1.2 Additional Scope Limitations.............................................................. 2 1.3 Reliance......................................................................................... 2 2.0 Scope of Services.................................................................... 3 3.0 Field Investigation................................................................... 4 3.1 Safety and Subsurface Utilities .......................................................... 4 3.2 Media Sampling Discussion ............................................................... 4 3.3 Field Procedures.............................................................................. 5 3.4 Site Restoration .............................................................................. 6 4.0 Field Investigation Results........................................................ 6 5.0 Laboratory Analytical Results .................................................... 6 5.1 Comparative Data Standards............................................................. 6 5.2 Quality Assurance/Quality Control ...................................................... 7 5.3 Soil Gas Sample Results ................................................................... 7 6.0 Conclusions............................................................................ 8 7.0 Recommendations ................................................................... 8 Facilities I Environmental I Geotechnical I Materials iii Limited Site Investigation „�li ierrac©n College and Drake I Fort Collins, Colorado July 19, 2024 1 Terracon Project No. 20237116 Appendix APPENDIX A EXHIBITS Exhibit 1 Topographic Map Exhibit 2 Site Diagram/Sampling Locations APPENDIX B TABLES Table 1 Soil Gas Analytical Results Summary APPENDIX C SOIL BORING LOGS APPENDIX D LABORATORY ANALYTICAL REPORTS AND CHAINS-OF- CUSTODY Facilities I Environmental I Geotechnical I Materials iv Limited Site Investigations Terracon College and Drake I Fort Collins, Colorado July 19, 2024 1 Terracon Project No. 20237116 1.0 Site Description and Background Information Site Name College and Drake Site Address 2601 and 2627 South College Avenue and 132 West Thunderbird Drive, Fort Collins, Larimer County, Colorado The site consists of approximately 6.55-acres. The site is comprised of five parcels (Larimer County Parcel Nos. 9726114001, 97261000023, 9726120002, 9726120001, and 9726100016) currently improved with Site multiple commercial buildings including 2Mazda of Fort Collins at 2601 Description South College Avenue; Sherwin-Williams at 2627 South College Avenue; and a vacant building at 132 West Thunderbird Drive. Terracon understands that Kentro Group intends to redevelop the site for residential and commercial use with multiple buildings. A Topographic Map showing the site location is included as Exhibit 1 and a Site Diagram (indicating the sample locations for this Limited Site Investigation [LSI]) is included as Exhibit 2 in Appendix A. During a recent Phase I Environmental Site Assessment (conducted by Terracon on the site), environmental concerns were raised based on review of recently completed Phase II Environmental Site Assessment (ESA) conducted by National Inspection Services® (Phase II ESA Report dated June 29, 2018). Terracon reviewed the analytical data included in the June 29, 2018, NIS Phase II ESA and compared the data with Residential Vapor Intrusion Screening Levels (VISLs) and Colorado Groundwater Quality Standards (CGWQS) and identified exceedances of chloroform and ethylbenzene (VISLs), as well as 1,2,4- tri methyl benzene (1,2,4-TMB) (CGWQS). Based on these exceedances, potential vapor intrusion presents a REC to the site. Additional groundwater investigation associated with the 1,2,4-TMB exceedance was not included in this scope of work. 1. 1 Standard of Care Terracon's services were performed in a manner consistent with generally accepted practices of the profession undertaken in similar studies in the same geographical area during the same time. Terracon makes no warranties, express or implied, regarding the findings, conclusions, or recommendations. Terracon does not warrant the work of laboratories, regulatory agencies, or other third parties supplying information used in the preparation of the report. These services were performed in accordance with the Scope of Facilities I Environmental I Geotechnical I Materials 1 Limited Site Investigation Terracon College and Drake I Fort Collins, Colorado July 19, 2024 1 Terracon Project No. 20237116 Services agreed with Kentro Group, our client, as reflected in our proposal and were not intended to be in strict conformance with ASTM E1903-19. Additional Scope Limitations Findings, conclusions, and recommendations resulting from these services are based upon information derived from the on-site activities and other services performed under this Scope of Services; such information is subject to change over time. Certain indicators of the presence of hazardous substances, petroleum products, or other constituents may have been latent, inaccessible, unobservable, nondetectable, or not present during these services. We cannot represent that the site contains no hazardous substances, toxic materials, petroleum products, or other latent conditions beyond those identified during this LSI. Soil vapor data are subject to seasonal variability associated with environmental conditions and the effects of overlying buildings. Subsurface conditions may vary from those encountered at specific borings, wells, or during other surveys, tests, assessments, investigations, or exploratory services. The data, interpretations, findings, and our recommendations are based solely upon data obtained at the time and within the scope of these services. 1.3 Reliance This report has been prepared for the exclusive use of Kentro Group (client) and any authorization for use or reliance by any other party (except a governmental entity having jurisdiction over the site) is prohibited without the express written authorization of the client and Terracon. Any unauthorized distribution or reuse is at the client's sole risk. Notwithstanding the foregoing, reliance by authorized parties will be subject to the terms, conditions, and limitations stated in the proposal, LSI report, and Terracon's Agreement for Services. The limitation of liability defined in the terms and conditions is the aggregate limit of Terracon's liability to the client and all relying parties unless otherwise agreed in writing. Facilities I Environmental I Geotechnical I Materials 2 Limited Site Investigation �r Terracon College and Drake I Fort Collins, Colorado July 19, 2024 1 Terracon Project No. 20237116 2.0 Scope of Services This LSI was undertaken in response to the results of Terracon's Phase I Environmental Site Assessment (ESA — Report No. 20237100) dated October 13, 2023, prepared by Terracon and is designed to evaluate the following recognized environmental conditions (RECs) and/or site concerns as discussed in Section 1.0. REC/Site Concern Description Vapor Intrusion Potential vapor intrusion with exceedances of chloroform and (Residential Exposure ethylbenzene above Residential Vapor Intrusion Screening Scenario) Levels (VISLs) During this LSI, a total of three soil borings and three soil vapor points, SGP-1 through SGP- 3, were installed at the site on June 14, 2024. Subsurface-soil vapor samples were subsequently collected on June 19, 2024, and analyzed in accordance with the procedures outlined in Section 3. The objective of this LSI was to evaluate the presence of chemicals of concern associated with the previously mentioned environmental concerns. The Scope of Services was not intended to identify every chemical possibly associated with the site. The proposed Scope was not intended to determine the extent or magnitude of any existing release. Additionally, contaminant concentrations detected in samples collected during the LSI are not necessarily representative of average or maximum concentrations over the entire site. This LSI report presents data from field activities that included the advancement of borings for the collection and analysis soil gas samples for chemical analysis. The sampling and analytical program is outlined below. Facilities I Environmental I Geotechnical I Materials 3 Limited Site Investigation �r Terracon College and Drake I Fort Collins, Colorado July 19, 2024 1 Terracon Project No. 20237116 Environmental Boring Total Number of Soil Gas Concern Designations Depth Samples Analysis' SPG-1, SGP- 5 1 soil gas VOCs Vapor Intrusion 2, SGP-3 per boring 'United States Environmental Protection Agency (EPA) SW-846 analytical methods: VOCs= volatile organic compounds by EPA Method TO-15 (soil gas) 3.0 Field Investigation 3.1 Safety and Subsurface Utilities Terracon is committed to the safety of all its employees. As such, and in accordance with our Incident and Injury Free® safety goals, Terracon conducted the fieldwork under a site- specific health and safety plan. The plan identified site-specific job hazards and proper pre- task planning procedures. Work was performed using EPA Level D work attire consisting of hard hats, high-visibility attire, safety glasses, protective gloves, and protective boots. Terracon contacted Colorado 811 and requested location and markings for subsurface utilities before commencing intrusive activities at the site. In addition, a private utility locator service was used for this project. 3.2 Media Sampling Discussion A total of three soil borings and three soil gas points, SGP-1 through SGP-3, were installed at the site within the northwest corner of the property. The soil boring and associated soil gas point SGP-1 was placed proximal to the previously observed VISL exceedances in groundwater. Refer to the attached Site Diagram (Exhibit 2, Appendix A) for a depiction of the sample locations and pertinent site features. The soil gas samples were collected in batch-certified 1-Liter Summa canisters (with flow regulators) provided by the laboratory. Samples and completed chain-of-custody forms were relinquished under chain of custody procedures to Pace Analytical, a certified laboratory located in Mt. Juliet, Tennessee. Samples were submitted for analysis on standard turnaround time basis. The samples were analyzed using standard EPA or ASTM test methods, as previously discussed. Facilities I Environmental I Geotechnical I Materials 4 Limited Site Investigation �r Terracon College and Drake I Fort Collins, Colorado July 19, 2024 1 Terracon Project No. 20237116 33 Field Procedures 3.3.1 Boring Advancement Drilling services were performed on June 14, 2024, by Alpine Remediation, Inc. (Alpine), a State of Colorado licensed driller using Direct-Push Technology (DPT). Oversight of the drilling activities was conducted by a Terracon field professional. Borehole advancement and assessment equipment was cleaned using a high-pressure washer prior to beginning the project and before beginning each soil boring. Non-dedicated sampling equipment was cleaned using an Alconox® wash and potable water rinse prior to the beginning of the project and before collecting each soil sample. Soil samples were collected continuously using 5-foot direct-push sampling tubes lined with dedicated Polyvinyl Chloride (PVC) liners, and were observed to document soil lithology, color, moisture content, and sensory indications of impairment. The boring logs in Appendix C include the lithology. 3.3.2 Soil Gas Sampling Construction The soil gas sampling was conducted using a direct-push drill rig to install soil gas probes to an approximate depth of 5 feet bgs. The soil gas probes consist of a 6-inch long stainless steel disposable screen anchored to polyethylene tubing that extends upward to the surface. A 1-foot 10-20 silica sand pack was placed around the gas probe and the remainder of the anulus was filled with hydrated bentonite chips. Care was taken to ensure adequate hydration of the chips to avoid air flow through the bentonite. Soil gas points were allowed to equilibrate for a minimum of 4 hours prior to sample purging and sample collection. 3.3.3 Media Sample Soil gas sampling was conducted within a polyethylene shroud placed over the sampling point. Sample tubing was connected to the sampling point and routed to the exterior of the shroud. Leak detection was conducted by introducing helium tracer gas into the sampling shroud through a separate port prior to sampling and using a portable helium gas detector to monitor for potential leaks in the sampling train. A graduated syringe was utilized to purge the sample train tubing prior to collecting the laboratory sample within a 1-liter summa canister. Field measurements by the portable helium gas detector were within acceptable levels [i.e., less than (<)5 percent (%) of the helium concentration in the shroud was detected through the sampling train]. After purging the sampling point of approximately three sampling train volumes and observing detected leaks, if any, were within acceptable levels, laboratory-supplied 1-liter Summa canisters that were pretested and batch-certified as free of chemicals of concern by the analytical laboratory were filled with soil gas at each sample location. The canisters were connected to the sampling probes using dedicated Teflon°-lined sample tubing and were equipped with laboratory-supplied flow regulators allowing for sample collection at a low-flow rate (i.e., <200 ml/min) for 30 minutes. Facilities I Environmental I Geotechnical I Materials 5 Limited Site Investigation Terracon College and Drake I Fort Collins, Colorado July 19, 2024 1 Terracon Project No. 20237116 Upon completion of sample collection, the Summa canisters were closed, secured, and appropriately labeled with pertinent sample information. Canister pressures were recorded upon initiation of sample collection and after sample collection. The sample containers were transported under chain-of-custody to Pace Analytical for analysis on a standard turnaround time. 3:4 Site Restoration At the completion of field activities, Terracon abandoned borings in accordance with state regulations and guidelines. The borings were backfilled with bentonite pellets to near surface grade, hydrated, and then completed with surface materials similar to the surrounding surface. Investigation derived waste (IDW) was not generated during the investigation. 4.0 Field Investigation Results Geology/Hydrogeology The boring logs in Appendix C detail the observed soil stratigraphy. The lithology encountered at SGP-1 and SGP-2 generally consisted of asphalt and fill material at the surface underlain by a soft to stiff clay and silt with trace to little fine sand from the surface to the final boring depth of 5 feet below ground surface (bgs). The lithology encountered at SGP-3 consisted of a sand and gravel fill material to 2 feet bgs underlain by a soft silty clay to a depth of 5 feet bgs. Although groundwater was not encountered in the borings installed during this investigation, the Phase II ESA previously conducted on the site by others indicated that groundwater was encountered at approximately 12 feet bgs. Soil staining and petroleum odors were observed in the soil collected from borings SGP-1 and SGP-2. 5.0 Laboratory Analytical Results The laboratory analytical reports and chain-of-custody records are attached in Appendix D. The following sections describe the results of the testing. The detection of an analyte at a concentration above a screening level does not necessarily indicate an adverse impact to human health or the environment; however, an exceedance of a screening level may indicate that additional investigation or action is warranted. 5. I Comparative Data Standards Analytical results were compared to the following. Facilities I Environmental I Geotechnical I Materials 6 Limited Site Investigation �r Terracon College and Drake I Fort Collins, Colorado July 19, 2024 1 Terracon Project No. 20237116 ■ Soil gas—EPA Vapor Intrusion Screening Level (VISL) calculator, which considers the EPA Indoor Air RSLs "_ ;; Quality Assurance/Quality Control Refer to Appendix D for the Laboratory Analytical Report. The lab report contains additional information regarding the sample preparation, analysis, and results that should be considered in the interpretation of the data. Quality assurance/quality control (QA/QC) of laboratory analytical data was maintained using the following methods and procedures: ■ Laboratory QA/QC controls, such as laboratory control standard (LCS), matrix spike (MS), and matrix spike duplicate (MSD); ■ Collection of samples in laboratory provided containers; ■ Chain-of-custody protocols; ■ Storage and transportation of soil gas samples in secured containers; and ■ Decontamination of reusable sampling equipment. Constituent concentrations qualified with ]-flag (1), if present, indicate the constituent was detected at a concentration above the laboratory sample detection limit (SDL), but below the laboratory method quantitation limit (MQL). Constituent concentrations qualified with a ]-flag are considered estimated values. Additionally, the laboratory conducts a QC of the data sets to ensure data meets data quality objectives. Terracon reviewed the laboratory reports and did not identify any QC standards substantially out of the control limits and/or that would negatively impact the data. Individual datum has been notated by the laboratory for specific criteria, as indicated in the reports attached as Appendix D. 5.3 Soil Gas Sample Results The soil vapor analytical data and corresponding regulatory screening levels are summarized in Table 1 (Appendix B). Only those concentrations of analytes which were reported above laboratory detection limits are included in the table. Several VOCs were reported in the soil gas samples. The following is a summary of those detections that exceeded VISLs. ■ SGP-1: Benzene was reported at 19.6 micrograms per cubic meter (pg/m3), which exceeds the EPA VISL for residential use (12.0 pg/m3) but is below the screening level for commercial use (52.4 pg/m3). Bromodichloromethane was reported at 13.6 pg/m3, which exceeds the EPA VISL for residential use (2.53 Facilities I Environmental I Geotechnical I Materials 7 Limited Site Investigation �r ferracon College and Drake I Fort Collins, Colorado July 19, 2024 1 Terracon Project No. 20237116 pg/m3) and commercial use (11.0 pg/m3). Chloroform was reported at 193 pg/m3 which exceeds the EPA VISL for residential use (4.07 pg/m3) and commercial use (17.8 pg/m3). Tetrachloroethene was reported at 536 pg/m3, which exceeds the EPA VISL for residential use (360 pg/m3) but is below the screening level for commercial use (1,570 pg/m3). ■ SGP-2: Benzene was reported at 93 pg/m3, which exceeds the EPA VISL for residential use (12.0 pg/m3) and commercial use (52.4 pg/m3). 1,2- dichloroethane was reported at 6.52 pg/m3, which exceeds the EPA VISL screening level for residential use (3.6 pg/m3) but is below the screening level for commercial use (15.7 pg/m3). Tetrachloroethene was reported at 1,170 pg/m3, which exceeds the EPA VISL for residential use (360 pg/m3) but is below the screening level for commercial use (1,570 pg/m3). ■ SPG-3: Benzene was reported at 67.1 pg/m3, which exceeds the EPA VISL for residential use (12.0 pg/m3) and commercial use (52.4 pg/m3). Tetrachloroethene was reported at 63.8 pg/m3, which exceeds the EPA VISL for residential use (360 pg/m3) but is below the screening level for commercial use (1,570 pg/m3). Elevated concentrations of benzene, bromodichloromethane, chloroform, 1,2- dichloroethane, and tetrachloroethene are present in the soil gas on the site. The reported concentrations are above the regulatory screening levels for commercial and/or residential use; the proposed use of the site is for both residential and commercial occupancy. 6.0 Conclusions Based on field observations and soil gas analytical results, a vapor intrusion risk has been identified at the site for residential and commercial use. 7.0 Recommendations The Scope of this LSI was intended to assess presence/absence of environmental impacts based upon the information developed during the project. The Scope was limited to what is presented in the proposal and, as such, was not intended to address the magnitude or extent of environmental impacts. Furthermore, the scope of this investigation was intended to evaluate potential impact in the northwest area of the site and did not include the remainder of the site. It is our understanding that the site will be developed in the future for residential and commercial use. Based on the review of analytical results from soil gas samples collected Facilities I Environmental I Geotechnical I Materials 8 Limited Site Investigation �r Terracon College and Drake I Fort Collins, Colorado July 19, 2024 1 Terracon Project No. 20237116 during this LSI, a properly designed passive vapor mitigation system (VMS) is recommended for the future building in the area investigated during this LSI. For proposed buildings in other areas of the site, the client may consider further investigation of the soil gas in the footprint of the proposed buildings to evaluate if a VMS is warranted for those buildings. If additional investigation is not performed, then Terracon recommends incorporating a VMS into proposed buildings in areas of the site that were not investigated. Given that impacted media encountered during the prior Phase II ESA on the site, preparation of a materials management plan (MMP) is recommended to manage potentially impacted soil that may be encountered and to protect workers during future construction activities. Facilities I Environmental I Geotechnical I Materials 9 Appendix A Exhibits Exhibit 1: Topographic Map Exhibit 2: Site Diagram All 1 - Cd8le+ ".f• �' �.w ��- �+ ','�-' �.-:,yr ` .�s ..•y., 'k'{.{' ,�: r �-,� ;' r ...!� ■ .. :, _ I r, E. ;. ,-,`•� 'sore _> '. I -:,. I L I ,� �} }' � �� ':� ,' - ,i; . ��.'�r � � 1.. ���rr1't rt :...r t,�'� ,-.�., ,� •I `�-,.ter Ij i414 :._ 41 " �' _-_ f, -�_f"� _.�� ', 1 t -4 - -�/Y{-�• JT1¢':-<# i'l ^(+f g i APPROXIMATE '1 SITE LOCATIONmmy • f -'�r� `-'. ,en 'rk . ' RCA �3rZ,lip Frortl 4ac } la ] 1 j s I v-12 f , s�{ ,j 1. y ';� .� I `c., rK }r. �� ni^ �" '� I. re•7 r r �I - t _.i f,..d` �r �:� I P`.r�5s $ J ^lu � _ I� , Rne y ' { I I 2 it 31 LL K. J IF sr +ion rW RVAD � , � _ ' _ - , - iASY xoa �r Warreyarkq tii zo 5 F TOPOGRAPHIC MAP IMAGE COURTESY OF THE U.S.GEOLOGICAL SURVEY Project Manager: Project No. - - TOPOGRAPHIC MAP Exhibit QUADRANGLES INCLUDE:FORT COLLINS, JDG 20237116 ierracon CO(1/1/1984). Drawn by: Scale: Jnr 1"..=2,00000' College and Drake DIAGRAM IS FOR GENERAL LOCATION ONLY, Checked by: KRS File z 11 116 1901 Sharp Point or Ste C 2601 South College Avenue AND IS NOT INTENDED FOR CONSTRUCTION Approved by: Date• Fort Collins,CO 80525-4429 Fort Collins, Colorado PURPOSES 11 KRS 7/01/2024 J. �CDjtA t,_1 APPROXIMATE _ - --- - - SITE BOUNDARY s 4P do of M • r4111lie 4 go,F1 • y f M At Project Manager: Project No. SITE DIAGRAM Exhibit AERIAL PHOTOGRAPHY PROVIDED BY lfl(; 20237116 Wrerracon MICROSOFT BING MAPS Drawn by: JDG Scale: AS SHOWN College and Drake DIAGRAM IS FOR GENERAL LOCATION ONLY, Checked by: KRS File'2M7116 1901 Sharp Point or Ste C 2601 South College Avenue 2 AND IS NOT INTENDED FOR CONSTRUCTION Approved by: Date: Fort Collins,CO 80525-4429 Fort Collins, Colorado PURPOSES KRS 7/01/2024 Appendix B Table Table 1: Soil Gas Analytical Results Summary Table 1 Soil Gas Analytical Results Summary College and Drake-Limited Site Investigation 2601 South College Avenue,Fort Collins,Colorado Terracon Project No.20237116 Residential VISL Go m SL Samples Parameter (pg/m3) (N9/m3� Units SGP-01 SGP-02 SGP-03 6/19/2024 6/19/2024 6/19/2024 VOCs by EPA TO-15 TPH(GC/MS)Low Fraction NE NE' pg/m3 5,870 888,000 19,800 B Acetone NE NE p /m3 596 38.3 <29.7 Benzene 12.0 52.4 /m3 19.6 93 Bromodichloromethane 2.53 11.0 p /m3 13.6 <5.22 <13.4 Carbon disulfide 24,300 102,000 pg/m3 56 212 <12.4 Chloroform 4.07 17.8 pg/m3EL 193 <3.79 <9.73 Cyclohexane 209,000 876,000 p /m3 31.7 <2.68 18.7 1,2-Dichloroethane 3.6 15.7 pg/m3 <2.92 6.52 <8.10 Ethanol NE NE pg/m3 52.6 <18.3 <47.1 Ethylbenzene 37.4 164 pg/m3 7.76 16.6 <8.67 4-Ethyltoluene NE NE p /m3 <3.54 5.25 <9.82 Trichlorofluoromethane NE NE pg/m3 1 <4.06 5.31 <11.2 Heptane 13,900 58,400 p /m3 15.6 <3.18 <8.18 n-Hexane 24,300 102,000 pg/m3 <8.00 75.4 80.7 Methylene Chloride 3,380 40,900 p /m3 11.6 <2.70 <6.94 2-Butanone(MEK) 174,000 730,000 pg/m3 74 <14.3 <36.9 Propene 104,000 438,000 /m3 384 37,400 <21.5 Tetrachloroethylene 360 1,570 pg/m3 1 536 1,170 63.8 Toluene 174,000 730,000 /m3 27.4 31.5 <18.8 1,2,4-Trimethylbenzene 2,090 8,760 pg/m3 5.2 <3.82 <9.82 2,2,4-Trimethylpentane NE NE pg/m3 1,340 281,000 4,000 m&p-Xylene 3,480 14,6 pg/m3 21.6 18.8 <17.3 o-Xylene /m3 7.41 6.24 <8.67 Notes: NE=Not Established Only detected analytes shown(detected concentrations are bold) VISL-Vapor Intrusion Screening Level(EPA,1 E-06 target cancer risk,1 target non-carcinogen hazard quotient,VISL Calculator V.3.5.1,May2024) <=Below Laboratory reporting limit pg/m3=micrograms per meter cubed B=The same analyte is found in the associated blank Page 1 of 1 20237116-May 2024 RSLs:Soil Gas-VISL 7/19/2024 Appendix C Soil Boring Logs BORING LOG NO. SGP-01 Page 1 of 1 PROJECT: College and Drake CLIENT: Kentro Group Denver, Colorado SITE: 2601 South College Avenue Fort Collins, Colorado c3 LOCATION See Exhibit A-2 J w o r O W Z (L z X Lu 0gm Ism d wI � > aOz LU �w O a gam❑ O ❑ o ai LU ) DEPTH MATERIAL DESCRIPTION 0.3 ASPHALT,asphalt road base SILTY CLAY,low plasticity,light brown,moist,medium stiff N black staining and odorous from 1-2 ft bgs LU LLi g 0 LU 95 000 z 0 OM 0 a Y ❑ 01 01 0 SGP-01 z Q W 5.0 W 5 Boring Terminated at 5 Feet 0 U r N N 0 Q tll Q z Z LU z K Z W H K O W w z O O K w w a The stratification lines represent the approximate transition between differing soil types and/or rock types; a in-situ these transitions may be gradual or may occur at different depths than shown. Soil gas sample collected from 4-5 ft bgs a W W Advancement Method: Notes: Direct Push J 1 H o Abandonment Method: Soil gas monitoring point installed at depth within borehole c� 0 WATER LEVEL OBSERVATIONS c7 Boring Started:06-14-2024 Boring Completed:06-14-2024 groundwater not encountered Wrerracon0 Drill Rig:Geoprobe Driller:Alpine Remediation m 1901 Sharp Point Dr Ste C = Fort Collins,CO Project No.:20237116 Exhibit: B-1 BORING LOG NO. SGP-02 Page 1 of 1 PROJECT: College and Drake CLIENT: Kentro Group Denver, Colorado SITE: 2601 South College Avenue Fort Collins, Colorado c7 LOCATION See Exhibit A-2 J uJ o O W O a. w w uu m U S J a CO W LU LU W J 2 d W W. J > W OZ ~W o- O ~g c7 0 o can LU uai DEPTH MATERIAL DESCRIPTION 0.3 ASPHALT,asphalt road base SILTY CLAY,low plasticity,brown,moist,medium stiff,with trace fine sand N black staining from 1-2 ft bgs;odorous throughout 0 W a a ui tL 95 0 z 0 Ld a W m o SGP-02 z W 5.0 � 5 W Boring Terminated at 5 Feet J 0 U N O 0 O J Q Q z Z 2 0 z Z W F O W K Q Z_ C7 O 2 0 LL 0 W a The stratification lines represent the appropmate transition between differing soil types and/or rock types; of in-situ these transitions may be gradual or may occur at different depths than shown. Soil gas sample collected from 4-5 ft bgs a W N Advancement Method: Notes: —` Direct Push 0 J H 0 Abandonment Method: U Soil gas monitoring point installed at depth within borehole U 0 WATER LEVEL OBSERVATIONS C7 - Boring Started:06-14-2024 Boring Completed:06-14-2024 groundwater not encounteredof 0 Ferracon Drill Rig:Geoprobe Driller:Alpine Remediation m 1901 Sharp Point Dr Ste C F Fort Collins,CO Project No.:20237116 Exhibit: B-2 BORING LOG NO. SGP-03 Page 1 of 1 PROJECT: College and Drake CLIENT: Kentro Group Denver, Colorado SITE: 2601 South College Avenue Fort Collins, Colorado c3 LOCATION See Exhibit A-2 J w o r O W Z (L z X Lu u)gm Ism a wI � > aOZ Lu Fw d 0 ~❑ O ❑ o ai LU v¢i c DEPTH MATERIAL DESCRIPTION WELL GRADED SAND,fine to coarse grained,brown,moist,loose,with some gravel;fill material `o r; 0 0 W a 2.0 i SILTY CLAY,low plasticity,light brown,moist,soft,with little fine sand and some gravel 40 0 z 0 QU C K fL a 0 ui ❑ SGP-03 z Q w 8,5.0 Boring Terminated at 5 Feet 5 0 U r N N 0 Q tll Q z Z LU z 0 Z W H 0 0 W w z O 0 K w w a The stratification lines represent the approximate transition between differing soil types and/or rock types; a in-situ these transitions may be gradual or may occur at different depths than shown. Soil gas sample collected from 4-5 ft bgs a W W Advancement Method: Notes: Direct Push J 1 H o Abandonment Method: Soil gas monitoring point installed at depth within borehole c� 0 WATER LEVEL OBSERVATIONS c7 Boring Started:06-14-2024 Boring Completed:06-14-2024 groundwater not encountered Wrerracon0 Drill Rig:Geoprobe Driller:Alpine Remediation m 1901 Sharp Point Dr Ste C = Fort Collins,CO Project No.:20237116 Exhibit: B-3 Appendix D Laboratory Analytical Reports and Chains-Of-Custody aceAnalyfical- ANALYTICAL REPORT June 27, 2024 FC rss Terracon - Fort Collins, CO Sample Delivery Group: L1749333 Fn Samples Received: 06/21/2024 FrProject Number: 20237116 Description: College & Drake Qc Site: FORT COLLINS, CO �GI Report To: Jordan Goff 1901 Sharp Point Drive,Ste C AI Fort Collins, CO 80525 FC Entire Report Reviewed By: -� 7 Tony Gibson Project Manager Results relate only to the items tested or calibrated and are reported as rounded values.This test report shall not be reproduced,except in full,without written approval of the laboratory.Where applicable,sampling conducted by Pace Analytical National is performed per guidance provided in laboratory standard operating procedures ENV-SOP-MTJL-0067 and ENV-SOP-MTJL-0068.Where sampling conducted by the customer,results relate to the accuracy of the information provided, and as the samples are received. - minnow Vill MOW Pace Analytical National 12065 Lebanon Rd Mount Juliet, TIN 37122 615-758-5858 . . ACCOUNT: PROJECT: SDG: DATEITIME: PAGE: Terracon-Fort Collins,CO 20237116 L1749333 06/27/2416:00 1 of 25 TABLE OF CONTENTS Cp: Cover Page Tc:Table of Contents 2 Ss:Sample Summary 3 Cn:Case Narrative 4 Sr:Sample Results 5 FS SGP-01 L1749333-01 5 Fn SGP-02 L1749333-02 7 SGP-03 L1749333-03 9 Fr Qc: Quality Control Summary 11 Volatile Organic Compounds(MS) by Method TO-15 11 ,QC GI: Glossary of Terms 23 F Al:Accreditations& Locations 24 Sc:Sample Chain of Custody 25 AI FC ACCOUNT: PROJECT: SDG: DATE/TIME: PAGE: Terracon-Fort Collins,CO 20237116 L1749333 06/27/24 16:00 2 of 25 SAMPLE SUMMARY Collected by Collected date/time Received date/time SGP-01 L1749333-01 Air Jordan Goff 06/19/2416:40 06/21/2409:15 FP Method Batch Dilution Preparation Analysis Analyst Location date/time date/time FC Volatile Organic Compounds(MS)by Method TO-15 WG2310538 3.61 06/23/2414:02 06/23/2414:02 JAP Mt.Juliet;TN Collected by Collected date/time Received date/time SGP-02 L1749333-02 Air Jordan Goff 06/19/2413:30 06/21/2409:15 Fn Method Batch Dilution Preparation Analysis Analyst Location date/time date/time Volatile Organic Compounds(MS)by Method TO-15 WG2310538 3.89 06/23/2414:48 06/23/2414:48 JAP Mt.Juliet,TN SSr Volatile Organic Compounds(MS)by Method TO-15 WG2312479 389 06/26/24 21:47 06/26/24 21:47 MNP Mt.Juliet,TN Volatile Organic Compounds(MS)by Method TO-15 WG2313344 778 06/27/2414:19 06/27/2414:19 MNP Mt.Juliet,TN 171 Collected by Collected date/time Received date/time F SGP-03 L1749333-03 Air Jordan Goff 06/19/2412:05 06/21/2409:15 Method Batch Dilution Preparation Analysis Analyst Location F date/time date/time Volatile Organic Compounds(MS)by Method TO-15 WG2311593 10 06/25/2414:35 06/25/2414:35 MNP Mt.Juliet,TN FC ACCOUNT: PROJECT: SDG: DATE/TIME: PAGE: Terracon-Fort Collins,CO 20237116 L1749333 06/27/2416:00 3 of 25 CASE NARRATIVE All sample aliquots were received at the correct temperature, in the proper containers,with the appropriate preservatives, and within method specified holding times, unless qualified or notated within the report. Where applicable, all MDL(LOD) and RDL(LOQ)values reported for environmental samples F have been corrected for the dilution factor used in the analysis. All Method and Batch Quality Control are within established criteria except where addressed in this case narrative, a non-conformance form or properly qualified within the sample results. By my digital signature below, I affirm to the best of my FS knowledge, all problems/anomalies observed by the laboratory as having the potential to affect the quality of the data have been identified by the laboratory, and no information or data have been knowingly withheld that would affect the quality of the data. Fr - E F Tony Gibson CAI Project Manager Fc ACCOUNT: PROJECT: SDG: DATE/TIME: PAGE: Terracon-Fort Collins,CO 20237116 L1749333 06/27/2416:00 4 of 25 SGP-01 SAMPLE RESULTS - 01 Collected date/time: 06/19/24 16:40 L1749333 Volatile Organic Compounds (MS) by Method TO-15 CAS# Mol.Wt. RDL1 RDL2 Result Result Qualifier Dilution Batch 17P Analyte ppbv ug/m3 ppbv ug/m3 TPH(GC/MS)Low Fraction 8006-61-9 101 722 2980 1420 5870 3.61 WG2310538 LTC Acetone 67-64-1 58.10 4.51 10.7 251 596 3.61 WG2310538 Allyl chloride 107-05-1 76.53 0.722 2.26 ND ND 3.61 WG2310538 F Benzene 71-43-2 78.10 0.722 2.31 6.15 19.6 3.61 WG2310538 Benzyl Chloride 100-44-7 127 0.722 3.75 ND ND 3.61 WG2310538 Fn Bromodichloromethane 75-27-4 164 0.722 4.84 2.03 13.6 3.61 WG2310538 Bromoform 75-25-2 253 2.17 22.5 ND ND 3.61 WG2310538 Bromomethane 74-83-9 94.90 0.722 2.80 ND ND 3.61 WG2310538 1,3-Butadiene 106-99-0 54.10 7.22 16.0 ND ND 3.61 WG2310538 Carbon disulfide 75-15-0 76.10 1.44 4.48 18.0 56.0 3.61 WG2310538 Carbon tetrachloride 56-23-5 154 0.722 4.55 ND ND 3.61 WG2310538 F Chlorobenzene 108-90-7 113 0.722 3.34 ND ND 3.61 WG2310538 Chloroethane 75-00-3 64.50 0.722 1.90 ND ND 3.61 WG2310538 F Chloroform 67-66-3 119 0.722 3.51 39.7 193 3.61 WG2310538 Chloromethane 74-87-3 50.50 0.722 1.49 ND ND 3.61 WG2310538 F 2-Chlorotoluene 95-49-8 126 0.722 3.72 ND ND 3.61 WG2310538 Cyclohexane 110-82-7 84.20 0.722 2.49 9.21 31.7 3.61 WG2310538 Dibromochloromethane 124-48-1 208 0.722 6.14 ND ND 3.61 WG2310538 F 1,2-Dibromoethane 106-93-4 188 0.722 5.55 ND ND 3.61 WG2310538 1,2-Dichlorobenzene 95-50-1 147 0.722 4.34 ND ND 3.61 WG2310538 1,3-Dichlorobenzene 541-73-1 147 0.722 4.34 ND ND 3.61 WG2310538 1,4-Dichl ore benzene 106-46-7 147 0.722 4.34 ND ND 3.61 WG2310538 1,2-Dichloroethane 107-06-2 99 0.722 2.92 ND ND 3.61 WG2310538 1,1-Dichloroethane 75-34-3 98 0.722 2.89 ND ND 3.61 WG2310538 1,1-Dichloroethene 75-35-4 96.90 0.722 2.86 ND ND 3.61 WG2310538 cis-1,2-Dichloroethene 156-59-2 96.90 0.722 2.86 ND ND 3.61 WG2310538 trans-1,2-Dichloroethene 156-60-5 96.90 0.722 2.86 ND ND 3.61 WG2310538 1,2-Dichloropropene 78-87-5 113 0.722 3.34 ND ND 3.61 WG2310538 cis-1,3-Dichloropropene 10061-01-5 111 0.722 3.28 ND ND 3.61 WG2310538 trans-1,3-Dichloropropene 10061-02-6 111 0.722 3.28 ND ND 3.61 WG2310538 1,4-Dioxane 123-91-1 88.10 2.27 8.18 ND ND 3.61 WG2310538 Ethanol 64-17-5 46.10 9.03 17.0 27.9 52.6 3.61 WG2310538 Ethylbenzene 100-41-4 106 0.722 3.13 1.79 7.76 3.61 WG2310538 4-Ethyltoluene 622-96-8 120 0.722 3.54 ND ND 3.61 WG2310538 Trichloroflu ore methane 75-69-4 137.40 0.722 4.06 ND ND 3.61 WG2310538 Dichlorodifluoromethane 75-71-8 120.92 0.722 3.57 ND ND 3.61 WG2310538 1,1,2-Trichlorotrifluoroethane 76-13-1 187.40 0.722 5.53 ND ND 3.61 WG2310538 1,2-Dichlorotetrafluoroethane 76-14-2 171 0.722 5.05 ND ND 3.61 WG2310538 Heptane 142-82-5 100 0.722 2.95 3.81 15.6 3.61 WG2310538 Hexachloro-1,3-butadiene 87-68-3 261 2.27 24.2 ND ND 3.61 WG2310538 n-Hexane 110-54-3 86.20 2.27 8.00 ND ND 3.61 WG2310538 Isopropylbenzene 98-82-8 120.20 0.722 3.55 ND ND 3.61 WG2310538 Methylene Chloride 75-09-2 84.90 0.722 2.51 3.35 11.6 3.61 WG2310538 Methyl Butyl Ketone 591-78-6 100 4.51 18.4 ND ND 3.61 WG2310538 2-Butanone(MEK) 78-93-3 72.10 4.51 13.3 25.1 74.0 3.61 WG2310538 4-Methyl-2-pentanone(MIBK) 108-10-1 100.10 4.51 18.5 ND ND 3.61 WG2310538 Methyl methacrylate 80-62-6 100.12 0.722 2.96 ND ND 3.61 WG2310538 MTBE 1634-04-4 88.10 0.722 2.60 ND ND 3.61 WG2310538 Naphthalene 91-20-3 128 2.27 11.9 ND ND 3.61 WG2310538 2-Propanol 67-63-0 60.10 4.51 11.1 ND ND 3.61 WG2310538 Propene 115-07-1 42.10 4.51 7.77 223 384 3.61 WG2310538 Styrene 100-42-5 104 1.44 6.13 ND ND 3.61 WG2310538 1,1,2,2-Tetrachloroethane 79-34-5 168 0.722 4.96 ND ND 3.61 WG2310538 Tetrachloroethylene 127-18-4 166 0.722 4.90 78.9 536 3.61 WG2310538 Tetrahydrofuran 109-99-9 72.10 0.722 2.13 ND ND 3.61 WG2310538 Toluene 108-88-3 92.10 1.81 6.82 7.28 27.4 3.61 WG2310538 ACCOUNT: PROJECT: SDG: DATE/TIME: PAGE: Terracon-Fort Collins,CO 20237116 L1749333 06/27/2416:00 5 of 25 Y,tl.}ati4.`:.il'Sn r.•Y 44�i1}Xikii ,. SGP-01 SAMPLE RESULTS - 01 Collected date/time: 06/19/2416:40 L1749333 Volatile Organic Compounds (MS) by Method TO-15 CAS# Mol.Wt. RDL1 RDL2 Result Result Qualifier Dilution Batch Cif Analyte ppbv ug/m3 ppbv ug/m3 1,2,4-Trichlorobenzene 120-82-1 181 2.27 16.8 ND ND 3.61 WG2310538 ITC 1,1,1-Trichloroethane 71-55-6 133 0.722 3.93 ND ND 3.61 WG2310538 1,1,2-Trichloroethane 79-00-5 133 0.722 3.93 ND ND 3.61 WG2310538 3 Trichloroethylene 79-01-6 131 0.722 3.87 ND ND 3.61 WG2310538 SS 1,2,4-Trim ethyl benzene 95-63-6 120 0.722 3.54 1.06 5.20 3.61 WG2310538 1,3,5-Trimethylbenzene 108-67-8 120 0.722 3.54 ND ND 3.61 WG2310538 Fn 2,2,4-Trimethylpentane 540-84-1 114.22 0.722 3.37 286 1340 3.61 WG2310538 Vinyl chloride 75-01-4 62.50 0.722 1.85 ND ND 3.61 WG2310538 Vinyl Bromide 593-60-2 106.95 0.722 3.16 ND ND 3.61 WG2310538 Vinyl acetate 108-05-4 86.10 2.27 7.99 ND ND 3.61 WG2310538 m&p-Xylene 179601-23-1 106 1.44 6.24 4.98 21.6 3.61 WG2310538 F o-Xylene 95-47-6 106 0.722 3.13 1.71 7.41 3.61 WG2310538 (S)1,4-Bromotluorobenzene 460-00-4 175 60.0-140 100 WG2310538 F, Sample Narrative: L1749333-01 WG2310538:Dilution due to sample volume. CAI Fc ACCOUNT: PROJECT: SDG: DATE/TIME: PAGE: Terracon-Fort Collins,CO 20237116 L1749333 06/27/2416:00 6 of 25 SGP-02 SAMPLE RESULTS - 02 Collected date/time: 06/19/24 13:30 L1749333 Volatile Organic Compounds (MS) by Method TO-15 CAS# Mol.Wt. RDL1 RDL2 Result Result Qualifier Dilution Batch I-� Analyte ppbv ug/m3 ppbv ug/m3 TPH(GC/MS)Low Fraction 8006-61-9 101 77800 321000 215000 888000 389 WG2312479 ITC Acetone 67-64-1 58.10 4.86 11.5 16.1 38.3 3.89 WG2310538 Allyl chloride 107-05-1 76.53 0.778 2.44 ND ND 3.89 WG2310538 3 SS Benzene 71-43-2 78.10 0.778 2.49 29.1 93.0 3.89 WG2310538 Benzyl Chloride 100-44-7 127 0.778 4.04 ND ND 3.89 WG2310538 Fn Bromodichloromethane 75-27-4 164 0.778 5.22 NDND 3.89 WG2310538 Bromoform 75-25-2 253 2.33 24.1 ND ND 3.89 WG2310538 Bromomethane 74-83-9 94.90 0.778 3.02 ND ND 3.89 WG2310538 1,3-Butadiene 106-99-0 54.10 7.78 17.2 ND ND 3.89 WG2310538 Carbon disulfide 75-15-0 76.10 1.56 4.86 68.1 212 3.89 WG2310538 Carbon tetrachloride 56-23-5 154 0.778 4.90 ND ND 3.89 WG2310538 F Chlorobenzene 108-90-7 113 0.778 3.60 ND ND 3.89 WG2310538 Chloroethane 75-00-3 64.50 0.778 2.05 ND ND 3.89 WG2310538 F Chloroform 67-66-3 119 0.778 3.79 ND ND 3.89 WG2310538 Chloromethane 74-87-3 50.50 0.778 1.61 ND ND 3.89 WG2310538 F 2-Chlorotoluene 95-49-8 126 0.778 4.01 ND ND 3.89 WG2310538 Cyclohexane 110-82-7 84.20 0.778 2.68 ND ND 3.89 WG2310538 Dibromochloromethane 124-48-1 208 0.778 6.62 ND ND 3.89 WG2310538 F 1,2-Dibromoethane 106-93-4 188 0.778 5.98 ND ND 3.89 WG2310538 1,2-Dichlorobenzene 95-50-1 147 0.778 4.68 ND ND 3.89 WG2310538 1,3-Dichlorobenzene 541-73-1 147 0.778 4.68 ND ND 3.89 WG2310538 1,4-Dichl ore benzene 106-46-7 147 0.778 4.68 ND ND 3.89 WG2310538 1,2-Dichloroethane 107-06-2 99 0.778 3.15 1.61 6.52 3.89 WG2310538 1,1-Dichloroethane 75-34-3 98 0.778 3.12 ND ND 3.89 WG2310538 1,1-Dichloroethene 75-35-4 96.90 0.778 3.08 ND ND 3.89 WG2310538 cis-1,2-Dichloroethene 156-59-2 96.90 0.778 3.08 ND ND 3.89 WG2310538 trans-1,2-Dichloroethene 156-60-5 96.90 0.778 3.08 ND ND 3.89 WG2310538 1,2-Dichloropropene 78-87-5 113 0.778 3.60 ND ND 3.89 WG2310538 cis-1,3-Dichloropropene 10061-01-5 111 0.778 3.53 ND ND 3.89 WG2310538 trans-1,3-Dichloropropene 10061-02-6 111 0.778 3.53 ND ND 3.89 WG2310538 1,4-Dioxane 123-91-1 88.10 2.45 8.83 ND ND 3.89 WG2310538 Ethanol 64-17-5 46.10 9.73 18.3 ND ND 3.89 WG2310538 Ethylbenzene 100-41-4 106 0.778 3.37 3.82 16.6 3.89 WG2310538 4-Ethyltoluene 622-96-8 120 0.778 3.82 1.07 5.25 3.89 WG2310538 Trichloroflu ore methane 75-69-4 137.40 0.778 4.37 0.945 5.31 3.89 WG2310538 Dichlorodifluoromethane 75-71-8 120.92 0.778 3.85 ND ND 3.89 WG2310538 1,1,2-Trichlorotrifluoroethane 76-13-1 187.40 0.778 5.96 ND ND 3.89 WG2310538 1,2-Dichlorotetrafluoroethane 76-14-2 171 0.778 5.44 ND ND 3.89 WG2310538 Heptane 142-82-5 100 0.778 3.18 ND ND 3.89 WG2310538 Hexachloro-1,3-butadiene 87-68-3 261 2.45 26.2 ND ND 3.89 WG2310538 n-Hexane 110-54-3 86.20 2.45 8.64 21.4 75.4 3.89 WG2310538 Isopropylbenzene 98-82-8 120.20 0.778 3.82 ND ND 3.89 WG2310538 Methylene Chloride 75-09-2 84.90 0.778 2.70 ND ND 3.89 WG2310538 Methyl Butyl Ketone 591-78-6 100 4.86 19.9 ND ND 3.89 WG2310538 2-Butanone(MEK) 78-93-3 72.10 4.86 14.3 ND ND 3.89 WG2310538 4-Methyl-2-pentanone(MIBK) 108-10-1 100.10 4.86 19.9 ND ND 3.89 WG2310538 Methyl methacrylate 80-62-6 100.12 0.778 3.19 ND ND 3.89 WG2310538 MTBE 1634-04-4 88.10 0.778 2.80 ND ND 3.89 WG2310538 Naphthalene 91-20-3 128 2.45 12.8 ND ND 3.89 WG2310538 2-Propanol 67-63-0 60.10 4.86 11.9 ND ND 3.89 WG2310538 Propene 115-07-1 42.10 486 837 21700 37400 389 WG2312479 Styrene 100-42-5 104 1.56 6.64 ND ND 3.89 WG2310538 1,1,2,2-Tetrachloroethane 79-34-5 168 0.778 5.35 ND ND 3.89 WG2310538 Tetrachloroethylene 127-18-4 166 0.778 5.28 172 1170 3.89 WG2310538 Tetrahydrofuran 109-99-9 72.10 0.778 2.29 ND ND 3.89 WG2310538 Toluene 108-88-3 92.10 1.95 7.35 8.37 31.5 3.89 WG2310538 ACCOUNT: PROJECT: SDG: DATE/TIME: PAGE: Terracon-Fort Collins,CO 20237116 L1749333 06/27/2416:00 7 of 25 SGP-02 SAMPLE RESULTS - 02 Collected date/time: 06/19/2413:30 L1749333 Volatile Organic Compounds (MS) by Method TO-15 CAS# Mol.Wt. RDL1 RDL2 Result Result Qualifier Dilution Batch Cif Analyte ppbv ug/m3 ppbv ug/m3 1,2,4-Trichlorobenzene 120-82-1 181 2.45 18.1 ND ND 3.89 WG2310538 ITC 1,1,1-Trichloroethane 71-55-6 133 0.778 4.23 ND ND 3.89 WG2310538 1,1,2-Trichloroethane 79-00-5 133 0.778 4.23 ND ND 3.89 WG2310538 3 Trichloroethylene 79-01-6 131 0.778 4.17 ND ND 3.89 WG2310538 SS 1,2,4-Trim ethyl benzene 95-63-6 120 0.778 3.82 ND ND 3.89 WG2310538 1,3,5-Trimethylbenzene 108-67-8 120 0.778 3.82 ND ND 3.89 WG2310538 Fn 2,2,4-Trimethylpentane 540-84-1 114.22 156 729 60100 281000 778 WG2313344 Vinyl chloride 75-01-4 62.50 0.778 1.99 ND ND 3.89 WG2310538 Vinyl Bromide 593-60-2 106.95 0.778 3.40 ND ND 3.89 WG2310538 Vinyl acetate 108-05-4 86.10 2.45 8.63 ND ND 3.89 WG2310538 m&p-Xylene 179601-23-1 106 1.56 6.76 4.33 18.8 3.89 WG2310538 F o-Xylene 95-47-6 106 0.778 3.37 1.44 6.24 3.89 WG2310538 (S)1,4-Bromofluorobenzene 460-00-4 175 60.0-140 129 WG2310538 (S)1,4-Bromofluorobenzene 460-00-4 175 60.0-140 105 WG2312479 GI (S)1,4-Bromofluorobenzene 460-00-4 175 60.0-140 105 WG2313344 Sample Narrative: , L1749333-02 WG2310538:Dilution due to sample volume. Fc ACCOUNT: PROJECT: SDG: DATE/TIME: PAGE: Terracon-Fort Collins,CO 20237116 L1749333 06/27/2416:00 8 of 25 SGP-03 SAMPLE RESULTS - 03 Collected date/time: 06/19/24 12:05 L1749333 Volatile Organic Compounds (MS) by Method TO-15 CAS# Mol.Wt. RDL1 RDL2 Result Result Qualifier Dilution Batch Fp Analyte ppbv ug/m3 ppbv ug/m3 TPH(GC/MS)Low Fraction 8006-61-9 101 2000 8260 4790 19800 B 10 WG2311593 F Acetone 67-64-1 58.10 12.5 29.7 ND ND 10 WG2311593 Allyl chloride 107-05-1 76.53 2.00 6.26 ND ND 10 WG2311593 a SS Benzene 71-43-2 78.10 2.00 6.39 21.0 67.1 10 WG2311593 Benzyl Chloride 100-44-7 127 2.00 10.4 ND ND 10 WG2311593 Fn Bromodichloromethane 75-27-4 164 2.00 13.4 ND ND 10 WG2311593 Bromoform 75-25-2 253 6.00 62.1 ND ND 10 WG2311593 Bromomethane 74-83-9 94.90 2.00 7.76 ND ND 10 WG2311593 1,3-Butadiene 106-99-0 54.10 20.0 44.3 ND ND 10 WG2311593 Carbon disulfide 75-15-0 76.10 4.00 12.4 ND ND 10 WG2311593 Carbon tetrachloride 56-23-5 154 2.00 12.6 ND ND 10 WG2311593 F Chlorobenzene 108-90-7 113 2.00 9.24 ND ND 10 WG2311593 Chloroethane 75-00-3 64.50 2.00 5.28 ND ND 10 WG2311593 F Chloroform 67-66-3 119 2.00 9.73 ND ND 10 WG2311593 Chloromethane 74-87-3 50.50 2.00 4.13 ND ND 10 WG2311593 F 2-Chlorotoluene 95-49-8 126 2.00 10.3 ND ND 10 WG2311593 Cyclohexane 110-82-7 84.20 2.00 6.89 5.43 18.7 10 WG2311593 Dibromochloromethane 124-48-1 208 2.00 17.0 ND ND 10 WG2311593 F 1,2-Dibromoethane 106-93-4 188 2.00 15.4 ND ND 10 WG2311593 1,2-Dichlorobenzene 95-50-1 147 2.00 12.0 ND ND 10 WG2311593 1,3-Dichlorobenzene 541-73-1 147 2.00 12.0 ND ND 10 WG2311593 1,4-Dichlorobenzene 106-46-7 147 2.00 12.0 ND ND 10 WG2311593 1,2-Dichloroethane 107-06-2 99 2.00 8.10 ND ND 10 WG2311593 1,1-Dichloroethane 75-34-3 98 2.00 8.02 ND ND 10 WG2311593 1,1-Dichloroethene 75-35-4 96.90 2.00 7.93 ND ND 10 WG2311593 cis-1,2-Dichloroethene 156-59-2 96.90 2.00 7.93 ND ND 10 WG2311593 trans-1,2-Dichloroethene 156-60-5 96.90 2.00 7.93 ND ND 10 WG2311593 1,2-Dichloropropene 78-87-5 113 2.00 9.24 ND ND 10 WG2311593 cis-1,3-Dichloropropene 10061-01-5 111 2.00 9.08 ND ND 10 WG2311593 trans-1,3-Dichloropropene 10061-02-6 111 2.00 9.08 ND ND 10 WG2311593 1,4-Dioxane 123-91-1 88.10 6.30 22.7 ND ND 10 WG2311593 Ethanol 64-17-5 46.10 25.0 47.1 ND ND 10 WG2311593 Ethylbenzene 100-41-4 106 2.00 8.67 ND ND 10 WG2311593 4-Ethyltoluene 622-96-8 120 2.00 9.82 ND ND 10 WG2311593 Trichlorofluoromethane 75-69-4 137.40 2.00 11.2 ND ND 10 WG2311593 Dichlorodifluoromethane 75-71-8 120.92 2.00 9.89 ND ND 10 WG2311593 1,1,2-Trichlorotrifluoroethane 76-13-1 187.40 2.00 15.3 ND ND 10 WG2311593 1,2-Dichlorotetrafluoroethane 76-14-2 171 2.00 14.0 ND ND 10 WG2311593 Heptane 142-82-5 100 2.00 8.18 ND ND 10 WG2311593 Hexachloro-1,3-butadiene 87-68-3 261 6.30 67.3 ND ND 10 WG2311593 n-Hexane 110-54-3 86.20 6.30 22.2 22.9 80.7 10 WG2311593 Isopropylbenzene 98-82-8 120.20 2.00 9.83 ND ND 10 WG2311593 Methylene Chloride 75-09-2 84.90 2.00 6.94 ND ND 10 WG2311593 Methyl Butyl Ketone 591-78-6 100 12.5 51.1 ND ND 10 WG2311593 2-Butanone(MEK) 78-93-3 72.10 12.5 36.9 ND ND 10 WG2311593 4-Methyl-2-pentanone(MIBK) 108-10-1 100.10 12.5 51.2 ND ND 10 WG2311593 Methyl methacrylate 80-62-6 100.12 2.00 8.19 ND ND 10 WG2311593 MTBE 1634-04-4 88.10 2.00 7.21 ND ND 10 WG2311593 Naphthalene 91-20-3 128 6.30 33.0 ND ND 10 WG2311593 2-Propanol 67-63-0 60.10 12.5 30.7 ND ND 10 WG2311593 Propene 115-07-1 42.10 12.5 21.5 ND ND 10 WG2311593 Styrene 100-42-5 104 4.00 17.0 ND ND 10 WG2311593 1,1,2,2-Tetrachloroethane 79-34-5 168 2.00 13.7 ND ND 10 WG2311593 Tetrachloroethylene 127-18-4 166 2.00 13.6 9.40 63.8 10 WG2311593 Tetrahydrofuran 109-99-9 72.10 2.00 5.90 ND ND 10 WG2311593 Toluene 108-88-3 92.10 5.00 18.8 ND ND 10 WG2311593 ACCOUNT: PROJECT: SDG: DATE/TIME: PAGE: Terracon-Fort Collins,CO 20237116 L1749333 06/27/2416:00 9 of 25 r.�. .-- .� .. SGP-03 SAMPLE RESULTS - 03 Collected date/time: 06/19/2412:05 L1749333 Volatile Organic Compounds (MS) by Method TO-15 CAS# Mol.Wt. RDL1 RDL2 Result Result Qualifier Dilution Batch Cif Analyte ppbv ug/m3 ppbv ug/m3 1,2,4-Trichlorobenzene 120-82-1 181 6.30 46.6 ND ND 10 WG2311593 TC 1,1,1-Trichloroethane 71-55-6 133 2.00 10.9 ND ND 10 WG2311593 1,1,2-Trichloroethane 79-00-5 133 2.00 10.9 ND ND 10 WG2311593 a Trichloroethylene 79-01-6 131 2.00 10.7 ND ND 10 WG2311593 SS 1,2,4-Trim ethyl benzene 95-63-6 120 2.00 9.82 ND ND 10 WG2311593 1,3,5-Trimethylbenzene 108-67-8 120 2.00 9.82 ND ND 10 WG2311593 Fn 2,2,4-Trimethylpentane 540-84-1 114.22 2.00 9.34 856 4000 10 WG2311593 Vinyl chloride 75-01-4 62.50 2.00 5.11 ND ND 10 WG2311593 Vinyl Bromide 593-60-2 106.95 2.00 8.75 ND ND 10 WG2311593 Vinyl acetate 108-05-4 86.10 6.30 22.2 ND ND 10 WG2311593 m&p-Xylene 179601-23-1 106 4.00 17.3 ND ND 10 WG2311593 F o-Xylene 95-47-6 106 2.00 8.67 ND ND 10 WG2311593 (S)1,4-Bromotluorobenzene 460-00-4 175 60.0-140 104 WG2311593 7G1 Sample Narrative: L1749333-03 WG2311593:Dilution due to matrix. , Fc ACCOUNT: PROJECT: SDG: DATE/TIME: PAGE: Terracon-Fort Collins,CO 20237116 L1749333 06/27/2416:00 10 of 25 WG2310538 QUALITY CONTROL SUMMARY Volatile Organic Compounds (MS) by Method TO-15 L1749333-01,02 Method Blank (MB) (MB)R4085964-3 06/23/2412:37 MB Result MB Qualifier MB MDL MB RDL Analyte ug/m3 ug/m3 ug/m3 TPH(GC/MS)Low Fraction U 164 826 Acetone U 1.39 2.97 F Allyl chloride U 0.357 0.626 Benzene U 0.228 0.639 Fn Benzyl Chloride U 0.311 1.04 Bromodichloromethane U 0.471 1.34 Bromoform U 0.757 6.21 Fr Bromomethane U 0.381 0.776 1,3-Butadiene U 0.230 4.43 Carbon disulfide U 0.317 1.24 Carbon tetrachloride U 0.461 1.26 Chlorobenzene U 0.385 0.924 F Chloroethane U 0.263 0.528 Chloroform U 0.349 0.973 Chloromethane U 0.213 0.413 1711 2-Chlorotoluene U 0.427 1.03 Cyclohexane U 0.259 0.689 FC Dibromochloromethane U 0.618 1.70 1,2-Dibromoethane U 0.554 1.54 1,2-Dichlorobenzene U 0.770 1.20 1,3-Dichlorobenzene U 1.09 1.20 1,4-Dichlorobenzene U 0.335 1.20 1,2-Dichloroethane U 0.283 0.810 1,1-Dichloroethane U 0.290 0.802 1,1-Dichloroethene U 0.302 0.793 cis-1,2-Dichloroethene U 0.311 0.793 trans-1,2-Dichloroethene U 0.267 0.793 1,2-Dichloropropane U 0.351 0.924 cis-1,3-Dichloropropene U 0.313 0.908 trans-1,3-Dichloropropene U 0.331 0.908 1,4-Dioxane U 0.300 2.27 Ethanol U 0.500 4.71 Ethylbenzene U 0.362 0.867 4-Ethyltoluene U 0.384 0.982 Trichlorofluoromethane U 0.460 1.12 Dichlorodifluoromethane U 0.678 0.989 1,1,2-Trichlorotrifluoroethane U 0.608 1.53 1,2-Dichlorotetrafluoroethane U 0.622 1.40 Heptane U 0.425 0.818 Hexachloro-1,3-butadiehe U 1.12 6.73 ACCOUNT: PROJECT: SDG: DATEITIME: PAGE: Terracon-Fort Collins,CO 20237116 L1749333 06/27/2416:00 11 of 25 WG2310538 QUALITY CONTROL SUMMARY Volatile Organic Compounds (MS) by Method TO-15 L1749333-01,02 Method Blank (MB) (MB)R4085964-3 06/23/2412:37 MB Result MB Qualifier MB MDL MB RDL Analyte ug/m3 ug/m3 ug/m3 n-Hexane U 0.726 2.22 Isopropylbenzene U 0.382 0.983 F Methylene Chloride U 0.340 0.694 Methyl Butyl Ketone U 0.544 5.11 Fn 2-Butanone(MEK) U 0.240 3.69 4-Methyl-2-pentanone(MIRK) U 0.313 5.12 Methyl methacrylate U 0.359 0.819 Fr MTBE U 0.233 0.721 Naphthalene U 1.83 3.30 2-Propanol U 0.649 3.07 Propene U 0.160 2.15 Styrene U 0.335 1.70 F 1,1,2,2-Tetrachloroethane U 0.511 1.37 Tetrachloroethylene U 0.553 1.36 Tetrahydrofuran U 0.216 0.590 FAI Toluene U 0.328 1.88 1,2,4-Trichlorobenzene U 1.10 4.66 1,1,1-Trichloroethane U 0.400 1.09 F 1,1,2-Trichloroethane U 0.422 1.09 Trichloroethylene U 0.364 1.07 1,2,4-Trim ethyl benzene U 0.375 0.982 1,3,5-Trimethylbenzene U 0.382 0.982 2,2,4-Trimethylpentane U 0.621 0.934 Vinyl chloride U 0.243 0.511 Vinyl Bromide U 0.373 0.875 Vinyl acetate U 0.408 2.22 m&p-Xylene U 0.585 1.73 o-Xylene U 0.359 0.867 (S)1,4-Bromofluorobenzene 98.8 60.0-140 L1749389-01 Original Sample (OS) • Duplicate (DUP) (OS)L1749389-01 06/23/2418:42•(DUP)R4085964-4 06/23/2419:28 Original Result DUP Result Dilution DUP RPD DUP Qualifier DUP RPD Limits Analyte ug/m3 ug/m3 % % TPH(GC/MS)Low Fraction ND ND 1 200 P1 25 Acetone 15.3 13.6 1 11.5 25 Allyl chloride ND ND 1 0.000 25 Benzene 0.824 ND 1 52.3 PI 25 ACCOUNT: PROJECT: SDG: DATEITIME: PAGE: Terracon-Fort Collins,CO 20237116 L1749333 06/27/2416:00 12 of 25 WG2310538 QUALITY CONTROL SUMMARY Volatile Organic Compounds (MS) by Method TO-15 L1749333-01,02 L1749389-01 Original Sample (OS) • Duplicate (DUP) (OS)L1749389-01 06/23/2418:42•(DUP)R4085964-4 06/23/2419:28 Original Result DUP Result Dilution DUP RPD DUP Qualifier DUP RPD Limits Analyte ug/m3 ug/m3 % % Benzyl Chloride ND ND 1 0.000 25 Bromodichloromethane ND ND 1 0.000 25 FS Bromoform ND ND 1 0.000 25 Bromomethane ND ND 1 0.000 25 4 Cn 1,3-Butadiene ND ND 1 200 P1 25 Carbon disulfide ND ND 1 0.000 25 Fr Carbon tetrachloride ND ND 1 0.000 25 Chlorobenzene ND ND 1 0.000 25 Chloroethane ND ND 1 0.000 25 ® Chloroform ND ND 1 0.000 25 Chloromethane 1.35 1.29 1 5.01 25 7G1 2-Chlorotoluene ND ND 1 0.000 25 Cyclohexane ND ND 1 0.000 25 Dibromochloromethane ND ND 1 0.000 25 AI 1,2-Dibromoethane ND ND 1 0.000 25 1,2-Dichlorobenzene ND ND 1 0.000 25 1,3-Dichlorobenzene ND ND 1 0.000 25 Sc 1,4-Dichlorobenzene 1.41 1.38 1 2.59 25 1,2-Dichloroethane ND ND 1 0.000 25 1,1-Dichloroethane ND ND 1 0.000 25 1,1-Dichloroethene ND ND 1 0.000 25 cis-1,2-Dichloroethene ND ND 1 0.000 25 trans-1,2-Dichloroethene ND ND 1 0.000 25 1,2-Dichloropropane ND ND 1 0.000 25 cis-1,3-Dichloropropene ND ND 1 0.000 25 trans-1,3-Dichloropropene ND ND 1 0.000 25 1,4-Dioxane ND ND 1 0.000 25 Ethanol 45.6 33.2 1 31.6 25 Ethylbenzene ND ND 1 0.000 25 4-Ethyltoluene ND ND 1 0.000 25 Trichlorofluoromethane ND ND 1 0.000 25 Dichlorodifluoromethane 1.67 1.62 1 3.00 25 1,1,2-Trichlorotrifluoroethane ND ND 1 0.000 25 1,2-Dichlorotetrafluoroethane ND NO 1 0.000 25 Heptane 1.11 1.08 1 2.62 25 Hexachloro-1,3-butadiene ND ND 1 0.000 25 n-Hexane 2.40 2.24 1 6.83 25 Isopropylbenzene ND NO 1 0.000 25 Methylene Chloride 4.65 4.69 1 0.743 25 ACCOUNT: PROJECT: SDG: DATEITIME: PAGE: Terracon-Fort Collins,CO 20237116 L1749333 06/27/2416:00 13 of 25 WG2310538 QUALITY CONTROL SUMMARY Volatile Organic Compounds (MS) by Method TO-15 L1749333-01,02 L1749389-01 Original Sample (OS) • Duplicate (DUP) (OS)L1749389-01 06/23/2418:42•(DUP)R4085964-4 06/23/2419:28 Original Result DUP Result Dilution DUP RPD DUP Qualifier DUP RPD Limits Analyte ug/m3 ug/m3 % % Methyl Butyl Ketone ND ND 1 0.000 25 2-Butanone(MEK) 5.34 ND 1 96.7 P1 25 ITS 4-Methyl-2-pentanone(MIBK) ND ND 1 0.000 25 Methyl methacrylate ND ND 1 0.000 25 4Cn MTBE ND ND 1 0.000 25 Naphthalene ND ND 1 0.000 25 Fr 2-Propanol ND ND 1 2.82 25 Propene 2.63 ND 1 50.1 P1 25 Styrene ND ND 1 200 P1 25 ® 1,1,2,2-Tetrachloroethane ND ND 1 0.000 25 Tetrachloroethylene ND ND 1 0.000 25 �GI Tetrahydrofuran ND ND 1 0.000 25 Toluene ND ND 1 4.11 25 1,2,4-Trichlorobenzene ND ND 1 0.000 25 A 1,1,1-Trichloroethane ND ND 1 0.000 25 1,1,2-Trichloroethane ND ND 1 0.000 25 Trichloroethylene ND ND 1 0.000 25 Fc 1,2,4-Trim ethyl benzene ND ND 1 0.000 25 1,3,5-Trimethylbenzene ND ND 1 0.000 25 2,2,4-Trimethylpentane ND ND 1 9.52 25 Vinyl chloride ND ND 1 0,000 25 Vinyl Bromide ND ND 1 0.000 25 Vinyl acetate ND ND 1 0.000 25 m&p-Xylene ND ND 1 0.000 25 o-Xylene ND ND 1 200 P1 25 (S)1,4-Bromofluorobenzene 96.9 60.0-140 Laboratory Control Sample (LCS) • Laboratory Control Sample Duplicate (LCSD) (LCS)R4085964-1 06/23/2411:02•(LCSD)R4085964-2 06/23/2411:51 Spike Amount LCS Result LCSD Result LCS Rec. LCSD Rec. Rec.Limits LCS Qualifier LCSD Qualifier RPD RPD Limits Analyte ug/m3 ug/m3 ug/m3 % % % % % TPH(GC/MS)Low Fraction 777 711 739 91.5 95.2 70.0-130 3.99 25 Acetone 8.91 9.51 9.70 107 109 70.0-130 1.98 25 Allyl chloride 11.7 12.6 12.0 108 102 70.0-130 5.34 25 Benzene 12.0 12.2 12.2 102 102 70.0-130 0.261 25 Benzyl Chloride 19.5 19.5 20.0 100 103 70.0-152 2.63 25 Bromodichloromethane 25.2 25.5 25.8 101 102 70.0-130 1.05 25 Bromoform 38.8 36.3 37.7 93.6 97.1 70.0-130 3.64 25 ACCOUNT: PROJECT: SDG: DATEITIME: PAGE: Terracon-Fort Collins,CO 20237116 L1749333 06/27/2416:00 14 of 25 WG2310538 QUALITY CONTROL SUMMARY Volatile Organic Compounds (MS) by Method TO-15 L1749333-01,02 Laboratory Control Sample (LCS) • Laboratory Control Sample Duplicate (LCSD) (LCS)R4085964-1 06/23/2411:02•(LCSD)R4085964-2 06/23/2411:51 Spike Amount LCS Result LCSD Result LCS Rec. LCSD Rec. Rec.Limits LCS Qualifier LCSD Qualifier RPD RPD Limits Analyte ug/m3 ug/m3 ug/m3 % % % % % Bromomethane 14.6 15.0 14.7 103 101 70.0-130 1.83 25 1,3-Butadiene 8.30 9.01 8.76 109 106 70.0-130 2.74 25 ITS Carbon disulfide 23.3 23.1 22.9 99.1 98.1 70.0-130 0.947 25 Carbon tetrachloride 23.6 24.1 24.2 102 103 70.0-130 0.782 25 Fn Chlorobenzene 17.3 17.7 17.7 102 102 70.0-130 0.261 25 Chloroethane 9.89 10.4 10.2 106 103 70.0-130 2.04 25 Chloroform 18.3 18.4 18.5 101 101 70.0-130 0.264 25 Fr Chloromethane 7.75 8.70 8.30 112 107 70.0-130 4.62 25 2-Chiorotoluene 19.3 19.6 19.9 101 103 70.0-130 1.57 25 Cyclohexane 12.9 13.5 13.7 105 106 70.0-130 1.27 25 Dibromochloromethane 31.9 32.5 32.1 102 101 70.0-130 1.32 25 1,2-Dibromoethane 28.8 29.6 29.8 103 103 70.0-130 0.776 25 �GI 1,2-Dichlorobenzene 22.5 22.2 22.7 98.7 101 70.0-130 2.14 25 1,3-Dichlorobenzene 22.5 22.6 22.7 100 101 70.0-130 0.531 25 1,4-Dichlorobenzene 22.5 22.8 22.9 101 102 70.0-130 0.526 25 FAI 1,2-Dichloroethane 15.2 15.7 16.1 103 106 70.0-130 2.29 25 1,1-Dichloroethane 15.0 15.3 15.5 102 103 70.0-130 1.30 25 Fc 1,1-Dichloroethene 14.9 15.1 15.1 101 101 70.0-130 0.000 25 cis-1,2-Dichloroethene 14.9 15.2 15.5 102 104 70.0-130 1.55 25 trans-1,2-Dichloroethene 14.9 15.2 15.4 102 103 70.0-130 1.04 25 1,2-Dichloropropane 17.3 18.1 18.2 104 105 70.0-130 0.510 25 cis-1,3-Dichloropropene 17.0 18.0 17.7 106 104 70.0-130 1.78 25 trans-1,3-Dichloropropene 17.0 18.0 17.9 106 105 70.0-130 0.505 25 1,4-Dioxane 13.5 15.4 15.6 114 115 70.0-140 0.930 25 Ethanol 7.07 5.62 5.96 79.5 84.3 55.0-148 5.86 25 Ethylbenzene 16.3 16.2 16.7 99.5 103 70.0-130 3.17 25 4-Ethyltoluene 18.4 19.1 19.2 104 105 70.0-130 0.768 25 Trichlorofluoromethane 21.1 20.6 21.2 97.9 101 70.0-130 2.69 25 Dichlorodifluoromethane 18.5 16.5 17.1 88.8 92.3 64.0-139 3.83 25 1,1,2-Trichlorotrifluoroethane 28.7 28.4 29.0 98.9 101 70.0-130 2.13 25 1,2-Dichlorotetrafluoroethane 26.2 27.6 27.7 105 106 70.0-130 0.506 25 Heptane 15.3 15.7 16.2 102 106 70.0-130 3.08 25 Hexachloro-1,3-butadiene 40.0 40.4 40.2 101 101 70.0-151 0.265 25 n-Hexane 13.2 13.5 14.0 102 106 70.0-130 3.59 25 Isopropylbenzene 18.4 19.0 19.5 103 106 70.0-130 2.56 25 Methylene Chloride 13.0 13.3 13.5 102 103 70.0-130 1.56 25 Methyl Butyl Ketone 15.3 16.2 16.4 106 107 70.0-149 1.01 25 2-Butanone(MEK) 11.1 11.4 11.9 103 107 70.0-130 4.05 25 4-Methyl-2-pentanone(MIBK) 15.4 16.0 15.9 104 104 70.0-139 0.513 25 Methyl methacrylate 15.4 16.3 17.1 106 111 70.0-130 5.15 25 ACCOUNT: PROJECT: SDG: DATEITIME: PAGE: Terracon-Fort Collins,CO 20237116 L1749333 06/27/2416:00 15 of 25 WG2310538 QUALITY CONTROL SUMMARY Volatile Organic Compounds (MS) by Method TO-15 L1749333-01,02 Laboratory Control Sample (LCS) • Laboratory Control Sample Duplicate (LCSD) (LCS)R4085964-1 06/23/2411:02•(LCSD)R4085964-2 06/23/2411:51 Spike Amount LCS Result LCSD Result LCS Rec. LCSD Rec. Rec.Limits LCS Qualifier LCSD Qualifier RPD RPD Limits Analyte ug/m3 ug/m3 ug/m3 % % % % % MTBE 13.5 13.8 14.6 102 108 70.0-130 5.08 25 Naphthalene 19.6 20.5 19.8 105 101 70.0-159 3.64 25 ITS 2-Propanol 9.22 9.19 9.56 99.7 104 70.0-139 3.93 25 Propene 6.46 6.61 6.89 102 107 64.0-144 4.08 25 Fn Styrene 31.9 33.6 34.5 105 108 70.0-130 2.50 25 1,1,2,2-Tetrachloroethane 25.8 25.4 25.7 98.7 99.7 70.0-130 1.08 25 Tetrachloroethylene 25.5 26.1 26.1 102 102 70.0-130 0.000 25 Fr Tetrahydrofuran 11.1 11.6 12.1 105 109 70.0-137 3.74 25 Toluene 14.1 14.5 14.5 102 102 70.0-130 0.000 25 1,2,4-Trichlorobenzene 27.8 28.4 27.9 102 101 70.0-160 1.84 25 1,1,1-Trichloroethane 20.4 21.1 21.1 103 103 70.0-130 0.000 25 1,1,2-Trichloroethane 20.4 20.9 20.8 102 102 70.0-130 0.261 25 �GI Trichloroethylene 20.1 21.0 20.6 105 102 70.0-130 2.06 25 1,2,4-Trim ethyl benzene 18.4 18.9 19.2 103 105 70.0-130 1.54 25 1,3,5-Tri methyl benzene 18.4 18.5 18.6 101 101 70.0-130 0.529 25 FAI 2,2,4-Trimethylpentane 17.5 18.1 18.1 103 103 70.0-130 0.000 25 Vinyl chloride 9.59 10.4 9.87 108 103 70.0-130 5.05 25 Fc Vinyl Bromide 16.4 17.3 17.0 105 104 70.0-130 1.53 25 Vinyl acetate 13.2 11.2 11.4 85.1 86.7 70.0-130 1.86 25 m&p-Xylene 32.5 33.1 34.1 102 105 70.0-130 2.97 25 o-Xylene 16.3 16.6 17.3 102 107 70.0-130 4.34 25 (S)1,4-BromoBuorobenzene 98.8 98.9 60.0-140 ACCOUNT: PROJECT: SDG: DATEITIME: PAGE: Terracon-Fort Collins,CO 20237116 L1749333 06/27/2416:00 16 of 25 WG2311593 QUALITY CONTROL SUMMARY Volatile Organic Compounds (MS) by Method TO-15 L1749333-03 Method Blink (MB) E] (MB)R4086536-3 06/25/2410:02 MB Result MB Qualifier MB MDL MB RDL Analyte ug/m3 ug/m3 ug/m3 ITC TPH(GC/MS)Low Fraction 245 J_ 164 826 Acetone U 1.39 2.97 FS Allyl chloride U 0.357 0.626 Benzene U 0.228 0.639 Fn Benzyl Chloride U 0.311 1.04 Bromodichloromethane U 0.471 1.34 Bromoform U 0.757 6.21 Fr Bromomethane U 0.381 0.776 1,3-Butadiene U 0.230 4.43 Carbon disulfide U 0.317 1.24 Carbon tetrachloride U 0.461 1.26 Chlorobenzene U 0.385 0.924 F Chloroethane U 0.263 0.528 Chloroform U 0.349 0.973 Chloromethane U 0.213 0.413 1711 2-Chlorotoluene U 0.427 1.03 Cyclohexane U 0.259 0.689 FC Dibromochloromethane U 0.618 1.70 1,2-Dibromoethane U 0.554 1.54 1,2-Dichlorobenzene U 0.770 1.20 1,3-Dichlorobenzene U 1.09 1.20 1,4-Dichlorobenzene U 0.335 1.20 1,2-Dichloroethane U 0.283 0.810 1,1-Dichloroethane U 0.290 0.802 1,1-Dichloroethene U 0.302 0.793 cis-1,2-Dichloroethene U 0.311 0.793 trans-1,2-Dichloroethene U 0.267 0.793 1,2-Dichloropropane U 0.351 0.924 cis-1,3-Dichloropropene U 0.313 0.908 trans-1,3-Dichloropropene U 0.331 0.908 1,4-Dioxane U 0.300 2.27 Ethanol U 0.500 4.71 Ethylbenzene U 0.362 0.867 4-Ethyltoluene U 0.384 0.982 Trichlorofluoromethane U 0.460 1.12 Dichlorodifluoromethane U 0.678 0.989 1,1,2-Trichlorotrifluoroethane U 0.608 1.53 1,2-Dichlorotetrafluoroethane U 0.622 1.40 Heptane U 0.425 0.818 Hexachloro-1,3-butadiehe U 1.12 6.73 ACCOUNT: PROJECT: SDG: DATEITIME: PAGE: Terracon-Fort Collins,CO 20237116 L1749333 06/27/2416:00 17 of 25 WG2311593 QUALITY CONTROL SUMMARY Volatile Organic Compounds (MS) by Method TO-15 L1749333-03 Method Blank (MB) C_ (MB)R4086536-3 06/25/2410:02 MB Result MB Qualifier MB MDL MB RDL Analyte ug/m3 ug/m3 ug/m3 ITC n-Hexane U 0.726 2.22 Isopropylbenzene U 0.382 0.983 FS Methylene Chloride U 0.340 0.694 Methyl Butyl Ketone U 0.544 5.11 Fn 2-Butanone(MEK) U 0.240 3.69 4-Methyl-2-pentanone(MIBK) U 0.313 5.12 Methyl methacrylate U 0.359 0.819 Fr MTBE U 0.233 0.721 Naphthalene U 1.83 3.30 2-Propanol U 0.649 3.07 Propene U 0.160 2.15 Styrene U 0.335 1.70 F 1,1,2,2-Tetrachloroethane U 0.511 1.37 Tetrachloroethylene U 0.553 1.36 Tetrahydrofuran U 0.216 0.590 FAI Toluene U 0.328 1.88 1,2,4-Trichlorobenzene U 1.10 4.66 1,1,1-Trichloroethane U 0.400 1.09 F 1,1,2-Trichloroethane U 0.422 1.09 Trichloroethylene U 0.364 1.07 1,2,4-Trim ethyl benzene U 0.375 0.982 1,3,5-Trimethylbenzene U 0.382 0.982 2,2,4-Trimethylpentane U 0.621 0.934 Vinyl chloride U 0.243 0.511 Vinyl Bromide U 0.373 0.875 Vinyl acetate U 0.408 2.22 m&p-Xylene U 0.585 1.73 o-Xylene U 0.359 0.867 (S)1,4-Bromofluorobenzene 99.1 60.0-140 Laboratory Control Sample (LCS) • Laboratory Control Sample Duplicate (LCSD) (LCS)R4086536-1 06/25/24 08:41•(LCSD)R4086536-2 06/25/24 09:22 Spike Amount LCS Result LCSD Result LCS Rec. LCSD Rec. Rec.Limits LCS Qualifier LCSD Qualifier RPD RPD Limits Analyte ug/m3 ug/m3 ug/m3 % % % % TPH(GC/MS)Low Fraction 777 896 909 115 117 70.0-130 1.37 25 Acetone 8.91 9.20 9.17 103 103 70.0-130 0.259 25 Allyl chloride 11.7 12.9 13.0 110 111 70.0-130 1.21 25 Benzene 12.0 12.6 12.7 105 106 70.0-130 1.01 25 ACCOUNT: PROJECT: SDG: DATEITIME: PAGE: Terracon-Fort Collins,CO 20237116 L1749333 06/27/2416:00 18 of 25 WG2311593 QUALITY CONTROL SUMMARY Volatile Organic Compounds (MS) by Method TO-15 L1749333-03 Laboratory Control Sample (LCS) • Laboratory Control Sample Duplicate (LCSD) (LCS)R4086536-1 06/25/24 08:41•(LCSD)R4086536-2 06/25/24 09:22 Spike Amount LCS Result LCSD Result LCS Rec. LCSD Rec. Rec.Limits LCS Qualifier LCSD Qualifier RPD RPD Limits Analyte ug/m3 ug/m3 ug/m3 % % % % % L Benzyl Chloride 19.5 22.1 22.2 114 114 70.0-152 0.234 25 Bromodichloromethane 25.2 26.9 26.8 107 107 70.0-130 0.250 25 FS Bromoform 38.8 42.8 43.3 110 111 70.0-130 0.962 25 Bromomethane 14.6 13.9 13.5 95.7 93.1 70.0-130 2.82 25 Fn 1,3-Butadiene 8.30 8.67 8.52 105 103 70.0-130 1.80 25 Carbon disulfide 23.3 25.2 25.3 108 108 70.0-130 0.246 25 Carbon tetrachloride 23.6 25.3 25.4 107 108 70.0-130 0.745 25 Fr Chlorobenzene 17.3 18.2 18.4 105 106 70.0-130 1.26 25 Chloroethane 9.89 9.52 9.07 96.3 91.7 70.0-130 4.82 25 Chloroform 18.3 19.3 19.4 106 106 70.0-130 0.503 25 Chloromethane 7.75 8.20 8.24 106 106 70.0-130 0.503 25 2-Chlorotoluene 19.3 21.4 21.6 111 112 70.0-130 1.20 25 �GI Cyclohexane 12.9 13.7 13.9 106 108 70.0-130 1.25 25 Dibromochloromethane 31.9 34.0 34.5 107 108 70.0-130 1.49 25 1,2-Dibromoethane 28.8 30.8 31.0 107 107 70.0-130 0.747 25 FAI 1,2-Dichlorobenzene 22.5 24.4 24.8 108 110 70.0-130 1.47 25 1,3-Dichlorobenzene 22.5 24.3 24.8 108 110 70.0-130 1.96 25 1,4-Dichlorobenzene 22.5 24.8 25.0 110 111 70.0-130 0.483 25 F 1,2-Dichloroethane 15.2 16.3 16.5 107 109 70.0-130 1.23 25 1,1-Dichloroethane 15.0 16.0 16.2 107 107 70.0-130 0.747 25 1,1-Dichloroethene 14.9 15.8 15.8 106 106 70.0-130 0.000 25 cis-1,2-Dichloroethene 14.9 16.1 16.2 108 109 70.0-130 0.983 25 trans-1,2-Dichloroethene 14.9 16.0 16.1 107 108 70.0-130 0.742 25 1,2-Dichloropropane 17.3 18.2 18.4 105 106 70.0-130 1.26 25 cis-1,3-Dichloropropene 17.0 18.5 18.4 109 108 70.0-130 0.491 25 trans-1,3-Dichloropropene 17.0 18.5 18.5 109 109 70.0-130 0.245 25 1,4-Dioxane 13.5 14.4 14.2 107 105 70.0-140 1.26 25 Ethanol 7.07 7.24 6.88 102 97.3 55.0-148 5.07 25 Ethylbenzene 16.3 17.6 17.8 109 110 70.0-130 0.978 25 4-Ethyltoluene 18.4 20.5 20.9 111 113 70.0-130 1.66 25 Trichlorofluoromethane 21.1 20.6 20.1 97.6 95.5 70.0-130 2.21 25 Dichlorodifluoromethane 18.5 18.2 18.5 98.4 100 64.0-139 1.61 25 1,1,2-Trichlorotrifluoroethane 28.7 29.8 29.7 104 103 70.0-130 0.257 25 1,2-Dichlorotetrafluoroethane 26.2 27.7 28.3 106 108 70.0-130 2.00 25 Heptane 15.3 16.3 16.0 106 105 70.0-130 1.77 25 Hexachloro-1,3-butadiehe 40.0 44.0 44.5 110 111 70.0-151 1.21 25 n-Hexane 13.2 14.5 14.5 110 109 70.0-130 0.244 25 Isopropylbenzene 18.4 20.6 20.8 112 113 70.0-130 0.712 25 Methylene Chloride 13.0 13.8 14.0 106 107 70.0-130 1.25 25 Methyl Butyl Ketone 15.3 16.9 16.9 110 110 70.0-149 0.242 25 ACCOUNT: PROJECT: SDG: DATEITIME: PAGE: Terracon-Fort Collins,CO 20237116 L1749333 06/27/2416:00 19 of 25 WG2311593 QUALITY CONTROL SUMMARY Volatile Organic Compounds (MS) by Method TO-15 L1749333-03 Laboratory Control Sample (LCS) • Laboratory Control Sample Duplicate (LCSD) (LCS)R4086536-1 06/25/24 08:41•(LCSD)R4086536-2 06/25/24 09:22 Spike Amount LCS Result LCSD Result LCS Rec. LCSD Rec. Rec.Limits LCS Qualifier LCSD Qualifier RPD RPD Limits Analyte ug/m3 ug/m3 ug/m3 % % % % % L 2-Butanone(MEK) 11.1 11.8 11.9 107 107 70.0-130 0.498 25 4-Methyl-2-pentanone(MIBK) 15.4 16.7 16.9 109 110 70.0-139 1.46 25 FS Methyl methacrylate 15.4 16.4 15.9 107 103 70.0-130 3.05 25 MTBE 13.5 14.8 14.8 110 109 70.0-130 0.244 25 Fn Naphthalene 19.6 23.6 23.9 120 122 70.0-159 1.32 25 2-Propanol 9.22 9.76 9.71 106 105 70.0-139 0.505 25 Propene 6.46 6.82 6.72 106 104 64.0-144 1.53 25 Fr Styrene 31.9 36.7 36.7 115 115 70.0-130 0.000 25 1,1,2,2-Tetrachloroethane 25.8 27.6 27.6 107 107 70.0-130 0.249 25 Tetrachloroethylene 25.5 26.7 27.0 105 106 70.0-130 1.01 25 Tetrahydrofuran 11.1 12.0 11.9 109 107 70.0-137 0.988 25 Toluene 14.1 15.1 15.2 107 108 70.0-130 0.496 25 F 1,2,4-Trichlorobenzene 27.8 32.0 32.4 115 117 70.0-160 1.38 25 1,1,1-Trichloroethane 20.4 21.6 21.8 106 107 70.0-130 1.00 25 1,1,2-Trichloroethane 20.4 21.3 21.6 104 106 70.0-130 1.52 25 FAI Trichloroethylene 20.1 21.1 21.3 105 106 70.0-130 1.01 25 1,2,4-Trim ethyl benzene 18.4 20.4 20.7 111 112 70.0-130 1.19 25 1,3,5-Trimethylbenzene 18.4 20.6 20.9 112 113 70.0-130 1.18 25 F 2,2,4-Trimethylpentane 17.5 19.5 19.6 111 112 70.0-130 0.239 25 Vinyl chloride 9.59 9,92 9.92 103 103 70.0-130 0.000 25 Vinyl Bromide 16.4 15.7 15.3 95.5 93.3 70.0-130 2.26 25 Vinyl acetate 13.2 15.4 15.3 117 116 70.0-130 0.689 25 m&p-Xylene 32.5 36.5 36.8 112 113 70.0-130 0.710 25 o-Xylene 16.3 18.1 18.3 111 112 70.0-130 0.955 25 (S)1,4-Bromofluorobenzene 102 102 60.0-140 ACCOUNT: PROJECT: SDG: DATEITIME: PAGE: Terracon-Fort Collins,CO 20237116 L1749333 06/27/2416:00 20 of 25 WG2312479 QUALITY CONTROL SUMMARY Volatile Organic Compounds (MS) by Method TO-15 L1749333-02 Method Blank (MB) (MB)R4086713-2 06/26/2410:06 MB Result MB Qualifier MB MDL MB RDL Analyte ug/m3 ug/m3 ug/m3 TPH(GC/MS)Low Fraction U 164 826 Propene U 0.160 2.15 (S)1,4-Bromofluorobenzene 103 60.0-140 ITS Fn Laboratory Control Sample (LCS) • Laboratory Control Sample Duplicate (LCSD) (LCS)R4086713-1 06/26/24 09:21•(LCSD)R4086713-3 06/26/2411:10 FrSpike Amount LCS Result LCSD Result LCS Rec. LCSD Rec. Rec.Limits LCS Qualifier LCSD Qualifier RPD RPD Limits Analyte ug/m3 ug/m3 ug/m3 % °% % % % TPH(GUMS)Low Fraction 777 562 578 72.3 74.5 70.0-130 2.90 25 Propene 6.46 6.11 6.08 94.7 94.1 64.0-144 0.565 25 7 (S)14-Bromofluorobenzene 101 103 60.0-140 G I AI Sc ACCOUNT: PROJECT: SDG: DATEITIME: PAGE: Terracon-Fort Collins,CO 20237116 L1749333 06/27/2416:00 21 of 25 WG2313344 QUALITY CONTROL SUMMARY Volatile Organic Compounds (MS) by Method TO-15 L1749333-02 Method Blank (MB) (MB)R4087368-3 06/27/24 09:41 MB Result MB Qualifier MB MDL MB RDL Analyte ug/m3 ug/m3 ug/m3 2,2,4-Trimethylpentane U 0.621 0.934 (S)1,4-8romofluorobenzene 101 60.0-140 ITS Laboratory Control Sample (LCS) • Laboratory Control Sample Duplicate (LCSD) Fn (LCS)R4087368-1 06/27/24 08:43•(LCSD)R4087368-2 06/27/24 09:13 Spike Amount LCS Result LCSD Result LCS Rec. LCSD Rec. Rec.Limits LCS Qualifier LCSD Qualifier RPD RPD Limits Sr Analyte ug/m3 ug/m3 ug/m3 % % % % 2,2,4-Trimethylpentane 17.5 18.3 18.3 104 104 70.0-130 0.000 25 ® (S)1,4-8romofluorobenzene 104 105 60.0-140 �GI FAI Sc ACCOUNT: PROJECT: SDG: DATEITIME: PAGE: Terracon-Fort Collins,CO 20237116 L1749333 06/27/2416:00 22 of 25 GLOSSARY OF TERMS Guide to Reading and Understanding Your Laboratory Report The information below is designed to better explain the various terms used in your report of analytical results from the Laboratory. This is not Fp intended as a comprehensive explanation,and if you have additional questions please contact your project representative. Fc Results Disclaimer-Information that may be provided by the customer,and contained within this report,include Permit Limits,Project Name, Sample ID,Sample Matrix,Sample Preservation,Field Blanks,Field Spikes,Field Duplicates,On-Site Data,Sampling Collection Dates/Times,and Sampling Location.Results relate to the accuracy of this information provided,and as the samples are received. Abbreviations and Definitions FS MDL Method Detection Limit. Fn ND Not detected at the Reporting Limit(or MDL where applicable). RDL Reported Detection Limit. Rec. Recovery. Fr RPD Relative Percent Difference. SDG Sample Delivery Group. F Surrogate(Surrogate Standard)-Analytes added to every blank,sample,Laboratory Control Sample/Duplicate and (S) Matrix Spike/Duplicate;used to evaluate analytical efficiency by measuring recovery.Surrogates are not expected to be detected in all environmental media. U Not detected at the Reporting Limit(or MDL where applicable). Analyte The name of the particular compound or analysis performed.Some Analyses and Methods will have multiple analytes reported. If the sample matrix contains an interfering material,the sample preparation volume or weight values differ from the F Dilution standard,or if concentrations of analytes in the sample are higher than the highest limit of concentration that the I ] laboratory can accurately report,the sample may be diluted for analysis.If a value different than 1 is used in this field,the result reported has already been corrected for this factor. FC These are the target%recovery ranges or%o difference value that the laboratory has historically determined as normal Limits for the method and analyte being reported.Successful QC Sample analysis will target all analytes recovered or duplicated within these ranges. Original Sample The non-spiked sample in the prep batch used to determine the Relative Percent Difference(RPD)from a quality control sample.The Original Sample may not be included within the reported SDG. This column provides a letter and/or number designation that corresponds to additional information concerning the result Qualifier reported.If a Qualifier is present,a definition per Qualifier is provided within the Glossary and Definitions page and potentially a discussion of possible implications of the Qualifier in the Case Narrative if applicable. The actual analytical final result(corrected for any sample specific characteristics)reported for your sample.If there was no measurable result returned for a specific analyte,the result in this column may state"ND"(Not Detected)or"BDL" Result (Below Detectable Levels).The information in the results column should always be accompanied by either an MDL (Method Detection Limit)or RDL(Reporting Detection Limit)that defines the lowest value that the laboratory could detect or report for this analyte. Uncertainty Confidence level of 2 sigma. (Radiochemistry) A brief discussion about the included sample results,including a discussion of any non-conformances to protocol Case Narrative(Cn) observed either at sample receipt by the laboratory from the field or during the analytical process.If present,there will be a section in the Case Narrative to discuss the meaning of any data qualifiers used in the report. Quality Control This section of the report includes the results of the laboratory quality control analyses required by procedure or Summary(Qc) analytical methods to assist in evaluating the validity of the results reported for your samples.These analyses are not being performed on your samples typically,but on laboratory generated material. This is the document created in the field when your samples were initially collected.This is used to verify the time and Sample Chain of date of collection,the person collecting the samples,and the analyses that the laboratory is requested to perform.This Custody(Sc) chain of custody also documents all persons(excluding commercial shippers)that have had control or possession of the samples from the time of collection until delivery to the laboratory for analysis. This section of your report will provide the results of all testing performed on your samples.These results are provided Sample Results(Sr) by sample ID and are separated by the analyses performed on each sample.The header line of each analysis section for each sample will provide the name and method number for the analysis reported. Sample Summary(Ss) This section of the Analytical Report defines the specific analyses performed for each sample ID,including the dates and times of preparation and/or analysis. Qualifier Description B The same analyte is found In the associated blank. J The identification of the analyte is acceptable;the reported value is an estimate. P1 RPD value not applicable for sample concentrations less than 5 times the reporting limit. ACCOUNT: PROJECT: SDG: DATE/TIME: PAGE: Terracon-Fort Collins,CO 20237116 L1749333 06/27/2416:00 23 of 25 ACCREDITATIONS & LOCATIONS Pace Analytical National 12065 Lebanon Rd Mount Juliet, TN 37122 FPAlabama 40660 Nebraska NE-OS-15-05 Alaska 17-026 Nevada TNO00032021-1 Fc Arizona AZO612 New Hampshire 2975 Arkansas 88-0469 New Jersey—NELAP TNO02 California 2932 New Mexico TN00003 FS Colorado TN00003 New York 11742 Connecticut PH-0197 North Carolina Env375 Florida E87487 North Carolina' DW21704 Fn Georgia NELAP North Carolina 3 41 Georgia' 923 North Dakota R-140 Idaho TN00003 Ohio—VAP CL0069 Fr Illinois 200008 Oklahoma 9915 Indiana C-TN-01 Oregon TN200002 Iowa 364 Pennsylvania 68-02979 Kansas E-10277 Rhode Island LA000356 F Kentucky'6 KY90010 South Carolina 84004002 Kentucky' 16 South Dakota n/a GI Louisiana A130792 Tennessee'^ 2006 Louisiana LA018 Texas T104704245-20-18 Maine TN00003 Texas' LABO152 Maryland 324 Utah TN000032021-11 Massachusetts M-TNO03 Vermont VT2006 Michigan 9958 Virginia 110033 Fc Minnesota 047-999-395 Washington C847 Mississippi TN00003 West Virginia 233 Missouri 340 Wisconsin 998093910 Montana CERT0086 Wyoming A21-A A21-A—ISO 17025 1461.01 AIHA-LAP,LLC EMLAP 100789 A21-A—IS017025' 1461.02 DOD 1461.01 Canada 1461.01 USDA P330-15-00234 EPA—Crypto TN00003 Drinking Water z Underground Storage Tanks 3 Aquatic Toxicity "Chemical/Microbiological 'Mold 6 Wastewater n/a Accreditation not applicable Not all certifications held by the laboratory are applicable to the results reported in the attached report. Accreditation is only applicable to the test methods specified on each scope of accreditation held by Pace Analytical. ACCOUNT: PROJECT: SDG: DATE/TIME: PAGE: Terracon-Fort Collins,CO 20237116 L1749333 06/27/2416:00 24 of 25 Pace'Lo<anon Requested(City/State): Air CHAIN-OF-CUSTODY Analytical Request Document LAB USE ONLY-Affix Workorder/Login Label Here ace Chain-of-Custody is a LEGAL DOCUMENT-Complete all relevant fields I 60, f'o CompanyName: Contact/Report To:Terracon -Fort Collins,CO Jordan Goff Street Address: Phone#: 970-484-03591901 Sharp Point Drive,Ste C E-snail: jordan.goff@terracon.com Scan QR code for instructions Fort Collins,CO 80525 M 170 City,State Zip: Cc E-Mail: Customer Project#: 20237116 Invoice to: Project Name: Invoice College&Drake E-Mail: Analyses Requested poi \/[—J Site Collection Info/Facility ID(as applicable): Purchase Order#(if applicable) 20y S-71%io Proj.Manager. TERRAFCO-20237116 FORT COLLINS,CO note#: Field Information 824-Chris Ward State origin of sample(s): Time Zone Collected:[ )AK [ ]PT [6 MT [ J CT [ ]ET oto( q b AcctNum/Client C/ rYTf/o ID: Data Deliverables: Regulatory Program(CAA,RCRA,etc.)as applicable: Canister TERRAFCO eve 111 [[Level III []Level IV PUF/FILTER r Rush(Pre-approval required): Permit#as applicable: oilPressure/Vacuum. „ Table#: 2 Day 3 day 5 day Other []EQUIS Date Results Uni[s for ug/m PPBV mg/m' PPMV E 3 Profile/ A l Other Requested:ST;W&4.Z -r-f- Reportin Flow Total E Template:T254734 'Matrix Codes(Insert in Matrix box below):Ambient(A),Indoor(1),Soil Vapor(SV),Other(0) Start End Pressure (n Prelog/Bottle Pressure/ / Duration Rate Volume In 0rd.ID: P1082027 P Summa Flow Begin Collection End Collection 6 / g^ Customer Sample ID Matrix• controller Vacuum Vacuum a Sampled (/r/'// 7 CanisterlD ID Date Time Date Time m/min (in Hg) (in Hg) (minutes) or Umin r1T3 or L I— Sample Comment .� X StM+PI.-TEMP+�2 t- SG - © S°v 2ia6� I�tly� � ��� x, ► —27 — � .� 1 Sz b r-aoM Na+o 1 S G P-02 s`v, 75751 6(szRfl [a z4 ws' 6 i3 Z o —2� — 13 X S GP--o3 S V 174tl (7,0 b %ZW tzosS -Zb X a� Sampl Re-eipt checklist _ai P entj Iutact. y N Signed c -urare _— P.ire E s atrive inta�a: —fl Size. _�1L 15L 1.4L 11 Tage Cc tor: G to E g orrert bottle3 used: _N Tubing Shunt .— Customer Remarks/Special Conditions/Possible Hazards: Collected By: tb( IJ Additional Instructions from Pace®: Printed Name: Signature: #Coolers: Thermometer ID: Correction Obs.Temp.(°C): Corrected Temp.(°C): Factor('C): Relin any- ig Date/Time: ,` eceived by/Company:(Signature) Date/Time: Tracking Number: 20 Relinquishe by/Co any:(Signature) Date/Time: Received by/Company:(Signature) Date/Time: Delivered by: In-Person Courier OR Relinquished by/Company:(Signature) Date/Time: ei y/Coma gnat Date �� j FedE% UPS Other Relinquished by/Company:(Signature) Date/Time: Re by/Company:(Signature) Date/Time: Page:_ of: Submitting a sample via this chain of custody constitutes acknowledgment and acceptance of the Pace Terms and Conditions found at https://www.pacelabs.com/resource-library/resource/pace-terms-and-conditions/