City of Satellite Beach Per and Polyfluoroalkyl Substances (PFAS) Water Sampling Satellite Beach, Florida

August 2, 2018 Mr. Nicholas Frank Sanzone Environmental Programs Coordinator 565 Cassia Boulevard Satellite Beach, FL 32937 nsanzone@satellitebeach.org Subject: City of Satellite Beach Per and Polyfluoroalkyl Substances (PFAS) Water Sampling Satellite Beach, Florida Dear Mr. Sanzone: Tetra Tech, Inc. (Tetra Tech) is pleased to provide the City of Satellite Beach this report summarizing the recent Per and Polyfluoroalkyl Substances (PFAS) groundwater sampling services for the City of Satellite Beach. BACKGROUND PFAS are a group of manufactured compounds widely used to make products resistant to stains, grease, and water. These compounds are found in everyday products, such as nonstick pans, post it notes, and food packaging. PFAS are also widely used in fire suppression foams. Some PFAS compounds can biotransform to perfluoroalkyl acids like perfluorooctane sulfonate (PFOS) and perfluorooctanoic acid (PFOA), which do not readily degrade. These compounds are emerging contaminants, and the science of the health risks, fate and transport, and detection methods is developing but still in the initial stages. The most likely route of exposure to these chemicals is through contaminated food or water. The United States Environmental Protection Agency (USEPA) has not established maximum contaminant levels (MCLs) for drinking water for PFAS, and the Florida Department of Environmental Protection (DEP) has not established Groundwater Cleanup Target Levels for PFAS. However, the USEPA has established a Health Advisory for PFOA and PFOS of 0.07 ug/l, and the DEP is expected to release its health advisory levels in the coming days. The City of Satellite Beach requested that Tetra Tech install and sample three monitoring wells. The City selected two City owned properties and one Brevard County owned property for the installation and sampling of monitoring wells with analysis for PFAS compounds, including PFOA and PFOS. Tetra Tech, Inc. 11 Riverside Drive, Suite 204, Cocoa, FL 32922 Tel 321.636.6470 Fax 321.636.6473 www.tetratech.com

Mr. Nick Sanzone August 2, 2018 Page 2 of 10 PHYSICAL SETTING According to the Geologic Map of Florida (Florida Geologic Survey 2001) the City of Satellite Beach is located in the Pleistocene/Holocene aged Beach Ridge and Dune Formation. The formation includes siliciclastics of light gray, tan, brown to black, unconsolidated to poorly consolidated, clean to clayey, silty, unfossiliferous, variably organic-bearing sands to blue green to olive green, poorly to moderately consolidated, sandy, silty clays. The sandy marine deposits are underlain by limestone, which may be exposed along much of the shoreline of Satellite Beach. FIELD INVESTIGATION ACTIVITIES Tetra Tech initiated field activities on July 17, 2018. The investigation included the installation and sampling of three monitoring wells at the following locations, as shown on Figure 1: Satellite Beach City Hall (SB1) Satellite Beach near Jackson Avenue and Delaura Court (SB2) Brevard County Parks - Sea Park (SB3) The field investigation activities conducted are described below. Well Drilling Activities Prior to drilling, Sunshine One Call underground utility clearance hotline was contacted by Tetra Tech s Licensed Well Drilling subcontractor, Preferred Drilling Solutions, Inc., to mark publicly accessible utilities. Well Construction Permits were obtained from the Brevard County Health Department prior to drilling, and permits are provided in Attachment A. All borings were hand cleared with a 4-inch diameter hand auger to identify and minimize the likelihood of damage to shallow subgrade utilities. Three groundwater monitoring wells were installed. Each well was constructed with a 1-inch diameter, Schedule 40, polyvinyl chloride (PVC), 0.010-inch slotted well screen, and 20-30 size sand filter pack. The well screens at each well location were 10 feet long. Drilling activities encountered refusal at a depth of 12.5 feet below ground surface (bgs) at location SB1, likely due to the presence of limestone, and well screens were installed from 2.2 to 12.2 feet bgs. Monitoring wells SB2 and SB3 were installed to a depth of 19.5 feet bgs, with well screen installed between 9.5 and 19.5 feet bgs. Sand filter pack was installed to one foot above the well screen. A minimum of 6-inches of bentonite was placed above the sand pack, and neat portland cement was used to seal the well to the surface. After installation and development, each temporary monitoring well was allowed to stabilize for a minimum of 24 hours TETRA TECH

Mr. Nick Sanzone August 2, 2018 Page 3 of 10 before purging and sampling was initiated. The Well Construction and Development Logs are provided in Attachment A. Groundwater Sampling and Analysis Each of the three monitoring wells were purged and sampled with a peristaltic pump using the low flow sampling techniques. Purging and groundwater sample collection was conducted in general accordance with FDEP-SOP-001/01 FS 2200: Groundwater Sampling, with additional precautions for PFAS cross contamination using Tetra Tech Standard Operating Procedure SA- 1.8 for Sample Acquisition for Perfluoroalkyl and Perfluoroalkyl Substances (PFAS) Analysis. New High-Density Poly Ethylene (HDPE) tubing was used to purge and collect groundwater samples at each monitoring well. Samples were obtained by pumping water from the aquifer until the water quality parameters stabilize. Field parameters (ph, specific conductance, dissolved oxygen, temperature, and turbidity) were measured at regular intervals using a water meter equipped with a flow through cell until three consecutive measurements met the following thresholds: Temperature: ± 0.2 C ph: ± 0.2 Standard Units Specific Conductance: ± 5.0% of reading Dissolved Oxygen: 20% Saturation Turbidity: 20 NTU In addition to the monitoring well samples, one Field Reagent Blank was also collected prior to sampling SB3. Samples were placed in laboratory-provided containers, sealed, labeled, packed in ice, and shipped under chain-of-custody protocol to SGS Laboratories for analysis of PFAS, including PFOA, PFOS and 22 additional compounds via USEPA Method 537M. Copies of the groundwater sampling sheets are provided in Attachment B. GROUNDWATER ANALYTICAL RESULTS Tetra Tech compared the analytical results of the groundwater samples to the 0.070 ug/l USEPA Health Advisory, as outlined in the USEPA documents Drinking Water Health Advisory for Perfluorooctanoic Acid (PFOA) (USEPA May 2016) and Drinking Water Health Advisory for Perfluorooctane Sulfonate (PFOS) (USEPA May 2016). In the USEPA Memorandum dated November 15, 2016, USEPA provided clarification that the purpose of the Health Advisories was to identify the concentration of PFOA and PFOS in drinking water at which adverse health effects are not anticipated to occur over a lifetime. The health advisories are not intended to be TETRA TECH

Mr. Nick Sanzone August 2, 2018 Page 4 of 10 used for other exposure scenarios. The State of Florida DEP does not currently have a Groundwater Cleanup Target Level for PFOA and PFOS; however, DEP has stated that they will be issuing a Health Advisory Level for PFOA and PFOS in the coming days. PFOA and PFOS were detected in each of the three monitoring wells, with PFOA concentrations ranging from 0.00733 ug/l I (I qualified, meaning that the detected concentration was below the practical quantitation limit) in SB3 to 0.0119 ug/l in SB1. PFOS concentrations ranged from 0.0188 ug/l in SB2 to 0.0296 ug/l in SB1. USEPA recommends adding PFOA and PFOS numbers together if both compounds are present and applying the sum of both compounds to the 0.070 ug/l Health Advisory Level. Combined PFOS and PFOA concentrations ranged from 0.02285 ug/l in SB2 to 0.0415 ug/l in SB1. All the PFOA and PFOS (including combined) results were less than the 0.070 ug/l USEPA Health Advisory Level. In addition to PFOA and PFOS, other PFAS were detected; however, there are no USEPA Health Advisory Levels available for PFAS except for PFOA and PFOS. The following additional PFAS compounds were detected: SB1: Perfluorobutanoic acid, perfluoropentanoic acid, perfluorohexanoic acid, perfluoroheptanoic acid, perfluorobutanesulfonic acid, perfluoropentanesulfonic acid, and perfluorohexanesulfonic acid, with a maximum concentration of 0.0146 ug/l. SB2: Perfluoropentanoic acid at a concentration of 0.00295 I. SB3: Perfluorobutanoic acid, perfluoropentanoic acid, perfluorohexanoic acid, perfluoroheptanoic acid, perfluorobutanesulfonic acid, and perfluorohexanesulfonic acid, at a maximum concentration of 0.0129 ug/l. No PFAS analytes were detected in the Field Reagent Blank. An analytical data summary and comparison to the USEPA Health Advisories is provided in Table 1, a summary of the PFOA and PFOS results are provided on Figure 1, and the laboratory analytical report is provided in Attachment C. CONCLUSIONS Based on the results of the groundwater sampling and analytical results, PFAS analytes were detected in each of the three monitoring wells, and PFOA and PFOS were both detected in each of the three wells. The individual PFOA and PFOS concentrations and the sum of the PFOA and PFOS concentrations were less than the USEPA Health Advisory level of 0.070 ug/l for each TETRA TECH

Figures TETRA TECH

Tables TETRA TECH

Table 1 - Monitroing Well PFAS Analytical Results City of Satellite Beach Analyte SB1-20180718 SB2-20180718 SB3-20180718 FRB-20180718 USEPA 7/18/2018 7/18/2018 7/18/2018 7/18/2018 HA Perfluorobutanoic acid 0.0101 I 0.0038 U 0.00631 I 0.0038 U NA Perfluoropentanoic acid 0.00721 I 0.00295 I 0.0129 0.0029 U NA Perfluorohexanoic acid 0.00614 I 0.0019 U 0.00625 I 0.0019 U NA Perfluoroheptanoic acid 0.00402 I 0.0019 U 0.00288 I 0.0019 U NA Perfluorooctanoic acid (PFOA) 0.0119 0.00405 I 0.00733 I 0.0019 U 0.07 Perfluorononanoic acid 0.0019 U 0.0019 U 0.0019 U 0.0019 U NA Perfluorodecanoic acid 0.0019 U 0.0019 U 0.0019 U 0.0019 U NA Perfluoroundecanoic acid 0.0019 U 0.0019 U 0.0019 U 0.0019 U NA Perfluorododecanoic acid 0.0029 U 0.0029 U 0.0029 U 0.0029 U NA Perfluorotridecanoic acid 0.0019 U 0.0019 U 0.0019 U 0.0019 U NA Perfluorotetradecanoic acid 0.0019 U 0.0019 U 0.0019 U 0.0019 U NA Perfluorobutanesulfonic acid 0.0108 0.0019 U 0.00615 I 0.0019 U NA Perfluoropentanesulfonic acid 0.00552 I 0.0019 U 0.0019 U 0.0019 U NA Perfluorohexanesulfonic acid 0.0146 0.0019 U 0.00207 I 0.0019 U NA Perfluoroheptanesulfonic acid 0.0019 U 0.0019 U 0.0019 U 0.0019 U NA Perfluorooctanesulfonic acid (PFOS) 0.0296 0.0188 0.0228 0.0029 U 0.07 Perfluorononanesulfonic acid 0.0019 U 0.0019 U 0.0019 U 0.0019 U NA Perfluorodecanesulfonic acid 0.0019 U 0.0019 U 0.0019 U 0.0019 U NA PFOSA 0.0019 U 0.0019 U 0.0019 U 0.0019 U NA MeFOSAA 0.0077 U 0.0077 U a 0.0077 U 0.0077 U a NA EtFOSAA 0.0077 U 0.0077 U 0.0077 U 0.0077 U NA 4:2 Fluorotelomer sulfonate 0.0038 U 0.0038 U 0.0038 U 0.0038 U NA 6:2 Fluorotelomer sulfonate 0.0038 U 0.0038 U 0.0038 U 0.0038 U NA 8:2 Fluorotelomer sulfonate 0.0038 U 0.0038 U 0.0038 U 0.0038 U NA Notes: All results are reported in ug/l. USEPA HA - United States Environmental Protection Agency Health Advisory Level. a - Associated CCV outside of control limits high, sample was ND. U - Not detcted above the referenced method detection limit. I - Result concentration is greater than or equal to the method detection limit but less than the practical quantitation limit. NA - Not available.

Attachment A Monitoring Well Construction TETRA TECH

Attachment B Monitoring Well Sampling Forms TETRA TECH

Attachment C Groundwater Analytical Results TETRA TECH

07/31/18 Orlando, FL 07/31/18 The results set forth herein are provided by SGS North America Inc. e-hardcopy 2.0 Automated Report Technical Report for Tetra Tech Satellite Beach PFC 100-1WM-T38598 SGS Job Number: Sampling Date: 07/18/18 Report to: Tetra Tech 11 Riverside Dr Suite 204 Cocoa, FL 32922 matt.shelton@tetratech.com ATTN: Matt Shelton Total number of pages in report: 26 Test results contained within this data package meet the requirements of the National Environmental Laboratory Accreditation Program and/or state specific certification programs as applicable. Caitlin Brice, M.S. General Manager Client Service contact: Ariel Hartney 407-425-6700 Certifications: FL(E83510), LA(03051), KS(E-10327), IL(200063), NC(573), NJ(FL002), NY(12022), SC(96038001) DoD ELAP(ANAB L2229), AZ(AZ0806), CA(2937), TX(T104704404), PA(68-03573), VA(460177), AK, AR, IA, KY, MA, MS, ND, NH, NV, OK, OR, UT, WA, WV This report shall not be reproduced, except in its entirety, without the written approval of SGS. Test results relate only to samples analyzed. SGS North America Inc. 4405 Vineland Road Suite C-15 Orlando, FL 32811 tel: 407-425-6700 fax: 407-425-0707 SGS is the sole authority for authorizing edits or modifications to this document. Unauthorized modification of this report is strictly prohibited. Review standard terms at: http://www.sgs.com/en/terms-and-conditions Please share your ideas about how we can serve you better at: EHS.US.CustomerCare@sgs.com 1 of 26

Table of Contents Section 1: Sample Summary... 3 Section 2: Case Narrative/Conformance Summary... 4 Section 3: Summary of Hits... 5 Section 4: Sample Results... 6 4.1: -1: SB1-20180718... 7 4.2: -2: SB2-20180718... 9 4.3: -3: FRB-20180718... 11 4.4: -4: SB3-20180718... 13 Section 5: Misc. Forms... 15 5.1: Chain of Custody... 16 Section 6: MS Semi-volatiles - QC Data Summaries... 18 6.1: Method Blank Summary... 19 6.2: Blank Spike Summary... 21 6.3: Matrix Spike Summary... 23 6.4: Duplicate Summary... 25-1- Sections: 1 2 3 4 5 6 2 of 26

1 SGS North America Inc. Sample Summary Tetra Tech Satellite Beach PFC Project No: 100-1WM-T38598 Job No: Sample Collected Matrix Client Number Date Time By Received Code Type Sample ID -1 07/18/18 10:05 EM 07/19/18 AQ Ground Water SB1-20180718 -2 07/18/18 12:30 EM 07/19/18 AQ Ground Water SB2-20180718 -3 07/18/18 13:20 EM 07/19/18 AQ Ground Water FRB-20180718-4 07/18/18 14:00 EM 07/19/18 AQ Ground Water SB3-20180718 3 of 26

SAMPLE DELIVERY GROUP CASE NARRATIVE 2 Client: Tetra Tech Job No: Site: Satellite Beach PFC Report Date: 7/31/2018 9:45:30 4 Sample(s) were collected on 07/18/2018 and were received at SGS North America Inc - Orlando on 07/19/2018 properly preserved, at 1.5 Deg. C and intact. These Samples received an SGS Orlando job number of. A listing of the Laboratory Sample ID, Client Sample ID and dates of collection are presented in the Results Summary Section. Except as noted below, all method specified calibrations and quality control performance criteria were met for this job. For more information, please refer to QC summary pages. MS Semi-volatiles By Method EPA 537M BY ID Matrix: AQ Batch ID: OP70986 All samples were extracted within the recommended method holding time. All samples were analyzed within the recommended method holding time. All method blanks for this batch meet method specific criteria. Sample(s) -3MS, -4DUP were used as the QC samples indicated. Sample(s) OP70986-MS, OP70986-DUP have surrogates outside control limits. OP70986-DUP for 13C8-PFOA: Outside control limits. -2 for MeFOSAA: Associated CCV outside of control limits high, sample was ND. -3 for MeFOSAA: Associated CCV outside of control limits high, sample was ND. SGS Orlando certifies that this report meets the project requirements for analytical data produced for the samples as received at SGS Orlando and as stated on the COC. SGS Orlando certifies that the data meets the Data Quality Objectives for precision, accuracy and completeness as specified in the SGS Orlando Quality Manual except as noted above. This report is to be used in its entirety. SGS Orlando is not responsible for any assumptions of data quality if partial data packages are used. Narrative prepared by: Kim Benham, Client Services (signature on file) 4 of 26

Summary of Hits Page 1 of 1 Job Number: Account: Tetra Tech Project: Satellite Beach PFC Collected: 07/18/18 3 Lab Sample ID Client Sample ID Result/ Analyte Qual PQL MDL Units Method -1 SB1-20180718 Perfluorobutanoic acid 0.0101 I 0.015 0.0038 ug/l EPA 537M BY ID Perfluoropentanoic acid 0.00721 I 0.0077 0.0029 ug/l EPA 537M BY ID Perfluorohexanoic acid 0.00614 I 0.0077 0.0019 ug/l EPA 537M BY ID Perfluoroheptanoic acid 0.00402 I 0.0077 0.0019 ug/l EPA 537M BY ID Perfluorooctanoic acid 0.0119 0.0077 0.0019 ug/l EPA 537M BY ID Perfluorobutanesulfonic acid 0.0108 0.0077 0.0019 ug/l EPA 537M BY ID Perfluoropentanesulfonic acid 0.00552 I 0.0077 0.0019 ug/l EPA 537M BY ID Perfluorohexanesulfonic acid 0.0146 0.0077 0.0019 ug/l EPA 537M BY ID Perfluorooctanesulfonic acid 0.0296 0.0077 0.0029 ug/l EPA 537M BY ID -2 SB2-20180718 Perfluoropentanoic acid 0.00295 I 0.0077 0.0029 ug/l EPA 537M BY ID Perfluorooctanoic acid 0.00405 I 0.0077 0.0019 ug/l EPA 537M BY ID Perfluorooctanesulfonic acid 0.0188 0.0077 0.0029 ug/l EPA 537M BY ID -3 FRB-20180718 No hits reported in this sample. -4 SB3-20180718 Perfluorobutanoic acid 0.00631 I 0.015 0.0038 ug/l EPA 537M BY ID Perfluoropentanoic acid 0.0129 0.0077 0.0029 ug/l EPA 537M BY ID Perfluorohexanoic acid 0.00625 I 0.0077 0.0019 ug/l EPA 537M BY ID Perfluoroheptanoic acid 0.00288 I 0.0077 0.0019 ug/l EPA 537M BY ID Perfluorooctanoic acid 0.00733 I 0.0077 0.0019 ug/l EPA 537M BY ID Perfluorobutanesulfonic acid 0.00615 I 0.0077 0.0019 ug/l EPA 537M BY ID Perfluorohexanesulfonic acid 0.00207 I 0.0077 0.0019 ug/l EPA 537M BY ID Perfluorooctanesulfonic acid 0.0228 0.0077 0.0029 ug/l EPA 537M BY ID 5 of 26

SGS North America Inc. Orlando, FL Section 4 Sample Results 4 Report of Analysis 6 of 26

SGS North America Inc. Report of Analysis Page 1 of 2 Client Sample ID: SB1-20180718 Lab Sample ID: -1 Date Sampled: 07/18/18 Matrix: AQ - Ground Water Date Received: 07/19/18 Method: EPA 537M BY ID EPA 537 MOD Percent Solids: n/a Project: Satellite Beach PFC 4.1 4 File ID DF Analyzed By Prep Date Prep Batch Analytical Batch Run #1 2Q17576.D 1 07/24/18 16:32 NG 07/20/18 09:30 OP70986 S2Q300 Run #2 Initial Volume Final Volume Run #1 130 ml 1.0 ml Run #2 PFAS List CAS No. Compound Result PQL MDL Units Q PERFLUOROALKYLCARBOXYLIC ACIDS 375-22-4 Perfluorobutanoic acid 0.0101 0.015 0.0038 ug/l I 2706-90-3 Perfluoropentanoic acid 0.00721 0.0077 0.0029 ug/l I 307-24-4 Perfluorohexanoic acid 0.00614 0.0077 0.0019 ug/l I 375-85-9 Perfluoroheptanoic acid 0.00402 0.0077 0.0019 ug/l I 335-67-1 Perfluorooctanoic acid 0.0119 0.0077 0.0019 ug/l 375-95-1 Perfluorononanoic acid 0.0019 U 0.0077 0.0019 ug/l 335-76-2 Perfluorodecanoic acid 0.0019 U 0.0077 0.0019 ug/l 2058-94-8 Perfluoroundecanoic acid 0.0019 U 0.0077 0.0019 ug/l 307-55-1 Perfluorododecanoic acid 0.0029 U 0.0077 0.0029 ug/l 72629-94-8 Perfluorotridecanoic acid 0.0019 U 0.0077 0.0019 ug/l 376-06-7 Perfluorotetradecanoic acid 0.0019 U 0.0077 0.0019 ug/l PERFLUOROALKYLSULFONATES 375-73-5 Perfluorobutanesulfonic acid 0.0108 0.0077 0.0019 ug/l 2706-91-4 Perfluoropentanesulfonic acid 0.00552 0.0077 0.0019 ug/l I 355-46-4 Perfluorohexanesulfonic acid 0.0146 0.0077 0.0019 ug/l 375-92-8 Perfluoroheptanesulfonic acid 0.0019 U 0.0077 0.0019 ug/l 1763-23-1 Perfluorooctanesulfonic acid 0.0296 0.0077 0.0029 ug/l 68259-12-1 Perfluorononanesulfonic acid 0.0019 U 0.0077 0.0019 ug/l 335-77-3 Perfluorodecanesulfonic acid 0.0019 U 0.0077 0.0019 ug/l PERFLUOROOCTANESULFONAMIDES 754-91-6 PFOSA 0.0019 U 0.0077 0.0019 ug/l PERFLUOROOCTANESULFONAMIDOACETIC ACIDS 2355-31-9 MeFOSAA 0.0077 U 0.038 0.0077 ug/l 2991-50-6 EtFOSAA 0.0077 U 0.038 0.0077 ug/l FLUOROTELOMER SULFONATES 757124-72-4 4:2 Fluorotelomer sulfonate 0.0038 U 0.015 0.0038 ug/l 27619-97-2 6:2 Fluorotelomer sulfonate 0.0038 U 0.015 0.0038 ug/l U = Not detected MDL = Method Detection Limit I = Result >= MDL but < PQL J = Estimated value PQL = Practical Quantitation Limit V = Indicates analyte found in associated method blank L = Indicates value exceeds calibration range N = Indicates presumptive evidence of a compound 7 of 26

SGS North America Inc. Report of Analysis Page 2 of 2 Client Sample ID: SB1-20180718 Lab Sample ID: -1 Date Sampled: 07/18/18 Matrix: AQ - Ground Water Date Received: 07/19/18 Method: EPA 537M BY ID EPA 537 MOD Percent Solids: n/a Project: Satellite Beach PFC 4.1 4 PFAS List CAS No. Compound Result PQL MDL Units Q 39108-34-4 8:2 Fluorotelomer sulfonate 0.0038 U 0.015 0.0038 ug/l CAS No. ID Standard Recoveries Run# 1 Run# 2 Limits 13C4-PFBA 105% 30-140% 13C5-PFPeA 105% 40-140% 13C5-PFHxA 111% 50-150% 13C4-PFHpA 121% 50-150% 13C8-PFOA 130% 50-150% 13C9-PFNA 136% 50-150% 13C6-PFDA 138% 50-150% 13C7-PFUnDA 79% 50-150% 13C2-PFDoDA 72% 50-150% 13C2-PFTeDA 42% 40-150% 13C3-PFBS 98% 50-150% 13C3-PFHxS 99% 50-150% 13C8-PFOS 109% 50-150% 13C8-FOSA 102% 30-140% d3-mefosaa 78% 50-150% 13C2-4:2FTS 105% 50-150% 13C2-6:2FTS 115% 50-150% 13C2-8:2FTS 112% 50-150% U = Not detected MDL = Method Detection Limit I = Result >= MDL but < PQL J = Estimated value PQL = Practical Quantitation Limit V = Indicates analyte found in associated method blank L = Indicates value exceeds calibration range N = Indicates presumptive evidence of a compound 8 of 26

SGS North America Inc. Report of Analysis Page 1 of 2 Client Sample ID: SB2-20180718 Lab Sample ID: -2 Date Sampled: 07/18/18 Matrix: AQ - Ground Water Date Received: 07/19/18 Method: EPA 537M BY ID EPA 537 MOD Percent Solids: n/a Project: Satellite Beach PFC 4.2 4 File ID DF Analyzed By Prep Date Prep Batch Analytical Batch Run #1 2Q17748.D 1 07/28/18 01:23 NG 07/20/18 09:30 OP70986 S2Q302 Run #2 Initial Volume Final Volume Run #1 130 ml 1.0 ml Run #2 PFAS List CAS No. Compound Result PQL MDL Units Q PERFLUOROALKYLCARBOXYLIC ACIDS 375-22-4 Perfluorobutanoic acid 0.0038 U 0.015 0.0038 ug/l 2706-90-3 Perfluoropentanoic acid 0.00295 0.0077 0.0029 ug/l I 307-24-4 Perfluorohexanoic acid 0.0019 U 0.0077 0.0019 ug/l 375-85-9 Perfluoroheptanoic acid 0.0019 U 0.0077 0.0019 ug/l 335-67-1 Perfluorooctanoic acid 0.00405 0.0077 0.0019 ug/l I 375-95-1 Perfluorononanoic acid 0.0019 U 0.0077 0.0019 ug/l 335-76-2 Perfluorodecanoic acid 0.0019 U 0.0077 0.0019 ug/l 2058-94-8 Perfluoroundecanoic acid 0.0019 U 0.0077 0.0019 ug/l 307-55-1 Perfluorododecanoic acid 0.0029 U 0.0077 0.0029 ug/l 72629-94-8 Perfluorotridecanoic acid 0.0019 U 0.0077 0.0019 ug/l 376-06-7 Perfluorotetradecanoic acid 0.0019 U 0.0077 0.0019 ug/l PERFLUOROALKYLSULFONATES 375-73-5 Perfluorobutanesulfonic acid 0.0019 U 0.0077 0.0019 ug/l 2706-91-4 Perfluoropentanesulfonic acid 0.0019 U 0.0077 0.0019 ug/l 355-46-4 Perfluorohexanesulfonic acid 0.0019 U 0.0077 0.0019 ug/l 375-92-8 Perfluoroheptanesulfonic acid 0.0019 U 0.0077 0.0019 ug/l 1763-23-1 Perfluorooctanesulfonic acid 0.0188 0.0077 0.0029 ug/l 68259-12-1 Perfluorononanesulfonic acid 0.0019 U 0.0077 0.0019 ug/l 335-77-3 Perfluorodecanesulfonic acid 0.0019 U 0.0077 0.0019 ug/l PERFLUOROOCTANESULFONAMIDES 754-91-6 PFOSA 0.0019 U 0.0077 0.0019 ug/l PERFLUOROOCTANESULFONAMIDOACETIC ACIDS 2355-31-9 MeFOSAA a 0.0077 U 0.038 0.0077 ug/l 2991-50-6 EtFOSAA 0.0077 U 0.038 0.0077 ug/l FLUOROTELOMER SULFONATES 757124-72-4 4:2 Fluorotelomer sulfonate 0.0038 U 0.015 0.0038 ug/l 27619-97-2 6:2 Fluorotelomer sulfonate 0.0038 U 0.015 0.0038 ug/l U = Not detected MDL = Method Detection Limit I = Result >= MDL but < PQL J = Estimated value PQL = Practical Quantitation Limit V = Indicates analyte found in associated method blank L = Indicates value exceeds calibration range N = Indicates presumptive evidence of a compound 9 of 26

SGS North America Inc. Report of Analysis Page 2 of 2 Client Sample ID: SB2-20180718 Lab Sample ID: -2 Date Sampled: 07/18/18 Matrix: AQ - Ground Water Date Received: 07/19/18 Method: EPA 537M BY ID EPA 537 MOD Percent Solids: n/a Project: Satellite Beach PFC 4.2 4 PFAS List CAS No. Compound Result PQL MDL Units Q 39108-34-4 8:2 Fluorotelomer sulfonate 0.0038 U 0.015 0.0038 ug/l CAS No. ID Standard Recoveries Run# 1 Run# 2 Limits 13C4-PFBA 105% 30-140% 13C5-PFPeA 105% 40-140% 13C5-PFHxA 104% 50-150% 13C4-PFHpA 116% 50-150% 13C8-PFOA 116% 50-150% 13C9-PFNA 112% 50-150% 13C6-PFDA 119% 50-150% 13C7-PFUnDA 104% 50-150% 13C2-PFDoDA 124% 50-150% 13C2-PFTeDA 92% 40-150% 13C3-PFBS 108% 50-150% 13C3-PFHxS 97% 50-150% 13C8-PFOS 102% 50-150% 13C8-FOSA 136% 30-140% d3-mefosaa 104% 50-150% 13C2-4:2FTS 70% 50-150% 13C2-6:2FTS 115% 50-150% 13C2-8:2FTS 99% 50-150% (a) Associated CCV outside of control limits high, sample was ND. U = Not detected MDL = Method Detection Limit I = Result >= MDL but < PQL J = Estimated value PQL = Practical Quantitation Limit V = Indicates analyte found in associated method blank L = Indicates value exceeds calibration range N = Indicates presumptive evidence of a compound 10 of 26

SGS North America Inc. Report of Analysis Page 1 of 2 Client Sample ID: FRB-20180718 Lab Sample ID: -3 Date Sampled: 07/18/18 Matrix: AQ - Ground Water Date Received: 07/19/18 Method: EPA 537M BY ID EPA 537 MOD Percent Solids: n/a Project: Satellite Beach PFC 4.3 4 File ID DF Analyzed By Prep Date Prep Batch Analytical Batch Run #1 2Q17749.D 1 07/28/18 01:39 NG 07/20/18 09:30 OP70986 S2Q302 Run #2 Initial Volume Final Volume Run #1 130 ml 1.0 ml Run #2 PFAS List CAS No. Compound Result PQL MDL Units Q PERFLUOROALKYLCARBOXYLIC ACIDS 375-22-4 Perfluorobutanoic acid 0.0038 U 0.015 0.0038 ug/l 2706-90-3 Perfluoropentanoic acid 0.0029 U 0.0077 0.0029 ug/l 307-24-4 Perfluorohexanoic acid 0.0019 U 0.0077 0.0019 ug/l 375-85-9 Perfluoroheptanoic acid 0.0019 U 0.0077 0.0019 ug/l 335-67-1 Perfluorooctanoic acid 0.0019 U 0.0077 0.0019 ug/l 375-95-1 Perfluorononanoic acid 0.0019 U 0.0077 0.0019 ug/l 335-76-2 Perfluorodecanoic acid 0.0019 U 0.0077 0.0019 ug/l 2058-94-8 Perfluoroundecanoic acid 0.0019 U 0.0077 0.0019 ug/l 307-55-1 Perfluorododecanoic acid 0.0029 U 0.0077 0.0029 ug/l 72629-94-8 Perfluorotridecanoic acid 0.0019 U 0.0077 0.0019 ug/l 376-06-7 Perfluorotetradecanoic acid 0.0019 U 0.0077 0.0019 ug/l PERFLUOROALKYLSULFONATES 375-73-5 Perfluorobutanesulfonic acid 0.0019 U 0.0077 0.0019 ug/l 2706-91-4 Perfluoropentanesulfonic acid 0.0019 U 0.0077 0.0019 ug/l 355-46-4 Perfluorohexanesulfonic acid 0.0019 U 0.0077 0.0019 ug/l 375-92-8 Perfluoroheptanesulfonic acid 0.0019 U 0.0077 0.0019 ug/l 1763-23-1 Perfluorooctanesulfonic acid 0.0029 U 0.0077 0.0029 ug/l 68259-12-1 Perfluorononanesulfonic acid 0.0019 U 0.0077 0.0019 ug/l 335-77-3 Perfluorodecanesulfonic acid 0.0019 U 0.0077 0.0019 ug/l PERFLUOROOCTANESULFONAMIDES 754-91-6 PFOSA 0.0019 U 0.0077 0.0019 ug/l PERFLUOROOCTANESULFONAMIDOACETIC ACIDS 2355-31-9 MeFOSAA a 0.0077 U 0.038 0.0077 ug/l 2991-50-6 EtFOSAA 0.0077 U 0.038 0.0077 ug/l FLUOROTELOMER SULFONATES 757124-72-4 4:2 Fluorotelomer sulfonate 0.0038 U 0.015 0.0038 ug/l 27619-97-2 6:2 Fluorotelomer sulfonate 0.0038 U 0.015 0.0038 ug/l U = Not detected MDL = Method Detection Limit I = Result >= MDL but < PQL J = Estimated value PQL = Practical Quantitation Limit V = Indicates analyte found in associated method blank L = Indicates value exceeds calibration range N = Indicates presumptive evidence of a compound 11 of 26

SGS North America Inc. Report of Analysis Page 2 of 2 Client Sample ID: FRB-20180718 Lab Sample ID: -3 Date Sampled: 07/18/18 Matrix: AQ - Ground Water Date Received: 07/19/18 Method: EPA 537M BY ID EPA 537 MOD Percent Solids: n/a Project: Satellite Beach PFC 4.3 4 PFAS List CAS No. Compound Result PQL MDL Units Q 39108-34-4 8:2 Fluorotelomer sulfonate 0.0038 U 0.015 0.0038 ug/l CAS No. ID Standard Recoveries Run# 1 Run# 2 Limits 13C4-PFBA 117% 30-140% 13C5-PFPeA 116% 40-140% 13C5-PFHxA 122% 50-150% 13C4-PFHpA 131% 50-150% 13C8-PFOA 126% 50-150% 13C9-PFNA 134% 50-150% 13C6-PFDA 129% 50-150% 13C7-PFUnDA 108% 50-150% 13C2-PFDoDA 125% 50-150% 13C2-PFTeDA 106% 40-150% 13C3-PFBS 121% 50-150% 13C3-PFHxS 107% 50-150% 13C8-PFOS 109% 50-150% 13C8-FOSA 131% 30-140% d3-mefosaa 112% 50-150% 13C2-4:2FTS 122% 50-150% 13C2-6:2FTS 121% 50-150% 13C2-8:2FTS 100% 50-150% (a) Associated CCV outside of control limits high, sample was ND. U = Not detected MDL = Method Detection Limit I = Result >= MDL but < PQL J = Estimated value PQL = Practical Quantitation Limit V = Indicates analyte found in associated method blank L = Indicates value exceeds calibration range N = Indicates presumptive evidence of a compound 12 of 26

SGS North America Inc. Report of Analysis Page 1 of 2 Client Sample ID: SB3-20180718 Lab Sample ID: -4 Date Sampled: 07/18/18 Matrix: AQ - Ground Water Date Received: 07/19/18 Method: EPA 537M BY ID EPA 537 MOD Percent Solids: n/a Project: Satellite Beach PFC 4.4 4 File ID DF Analyzed By Prep Date Prep Batch Analytical Batch Run #1 2Q17580.D 1 07/24/18 18:03 NG 07/20/18 09:30 OP70986 S2Q300 Run #2 Initial Volume Final Volume Run #1 130 ml 1.0 ml Run #2 PFAS List CAS No. Compound Result PQL MDL Units Q PERFLUOROALKYLCARBOXYLIC ACIDS 375-22-4 Perfluorobutanoic acid 0.00631 0.015 0.0038 ug/l I 2706-90-3 Perfluoropentanoic acid 0.0129 0.0077 0.0029 ug/l 307-24-4 Perfluorohexanoic acid 0.00625 0.0077 0.0019 ug/l I 375-85-9 Perfluoroheptanoic acid 0.00288 0.0077 0.0019 ug/l I 335-67-1 Perfluorooctanoic acid 0.00733 0.0077 0.0019 ug/l I 375-95-1 Perfluorononanoic acid 0.0019 U 0.0077 0.0019 ug/l 335-76-2 Perfluorodecanoic acid 0.0019 U 0.0077 0.0019 ug/l 2058-94-8 Perfluoroundecanoic acid 0.0019 U 0.0077 0.0019 ug/l 307-55-1 Perfluorododecanoic acid 0.0029 U 0.0077 0.0029 ug/l 72629-94-8 Perfluorotridecanoic acid 0.0019 U 0.0077 0.0019 ug/l 376-06-7 Perfluorotetradecanoic acid 0.0019 U 0.0077 0.0019 ug/l PERFLUOROALKYLSULFONATES 375-73-5 Perfluorobutanesulfonic acid 0.00615 0.0077 0.0019 ug/l I 2706-91-4 Perfluoropentanesulfonic acid 0.0019 U 0.0077 0.0019 ug/l 355-46-4 Perfluorohexanesulfonic acid 0.00207 0.0077 0.0019 ug/l I 375-92-8 Perfluoroheptanesulfonic acid 0.0019 U 0.0077 0.0019 ug/l 1763-23-1 Perfluorooctanesulfonic acid 0.0228 0.0077 0.0029 ug/l 68259-12-1 Perfluorononanesulfonic acid 0.0019 U 0.0077 0.0019 ug/l 335-77-3 Perfluorodecanesulfonic acid 0.0019 U 0.0077 0.0019 ug/l PERFLUOROOCTANESULFONAMIDES 754-91-6 PFOSA 0.0019 U 0.0077 0.0019 ug/l PERFLUOROOCTANESULFONAMIDOACETIC ACIDS 2355-31-9 MeFOSAA 0.0077 U 0.038 0.0077 ug/l 2991-50-6 EtFOSAA 0.0077 U 0.038 0.0077 ug/l FLUOROTELOMER SULFONATES 757124-72-4 4:2 Fluorotelomer sulfonate 0.0038 U 0.015 0.0038 ug/l 27619-97-2 6:2 Fluorotelomer sulfonate 0.0038 U 0.015 0.0038 ug/l U = Not detected MDL = Method Detection Limit I = Result >= MDL but < PQL J = Estimated value PQL = Practical Quantitation Limit V = Indicates analyte found in associated method blank L = Indicates value exceeds calibration range N = Indicates presumptive evidence of a compound 13 of 26

SGS North America Inc. Report of Analysis Page 2 of 2 Client Sample ID: SB3-20180718 Lab Sample ID: -4 Date Sampled: 07/18/18 Matrix: AQ - Ground Water Date Received: 07/19/18 Method: EPA 537M BY ID EPA 537 MOD Percent Solids: n/a Project: Satellite Beach PFC 4.4 4 PFAS List CAS No. Compound Result PQL MDL Units Q 39108-34-4 8:2 Fluorotelomer sulfonate 0.0038 U 0.015 0.0038 ug/l CAS No. ID Standard Recoveries Run# 1 Run# 2 Limits 13C4-PFBA 100% 30-140% 13C5-PFPeA 99% 40-140% 13C5-PFHxA 107% 50-150% 13C4-PFHpA 117% 50-150% 13C8-PFOA 141% 50-150% 13C9-PFNA 136% 50-150% 13C6-PFDA 132% 50-150% 13C7-PFUnDA 79% 50-150% 13C2-PFDoDA 73% 50-150% 13C2-PFTeDA 50% 40-150% 13C3-PFBS 99% 50-150% 13C3-PFHxS 99% 50-150% 13C8-PFOS 105% 50-150% 13C8-FOSA 112% 30-140% d3-mefosaa 77% 50-150% 13C2-4:2FTS 100% 50-150% 13C2-6:2FTS 119% 50-150% 13C2-8:2FTS 106% 50-150% U = Not detected MDL = Method Detection Limit I = Result >= MDL but < PQL J = Estimated value PQL = Practical Quantitation Limit V = Indicates analyte found in associated method blank L = Indicates value exceeds calibration range N = Indicates presumptive evidence of a compound 14 of 26

SGS North America Inc. Orlando, FL Section 5 Misc. Forms 5 Custody Documents and Other Forms Includes the following where applicable: Chain of Custody 15 of 26

5 5.1 : Chain of Custody Page 1 of 2 16 of 26

SGS Sample Receipt Summary Job Number: Date / Time Received: 7/19/2018 3:05:00 PM Client: TERATECH Delivery Method: ALSE Project: SATELLITE BEACH PFC Airbill #'s: Therm ID: IR 1; Therm CF: 0.1; # of Coolers: 1 Cooler Temps (Raw Measured) C: Cooler Temps (Corrected) C: Cooler 1: (1.4); Cooler 1: (1.5); Cooler Information Y or N Sample Information Y or N N/A 1. Custody Seals Present 2. Custody Seals Intact 3. Temp criteria achieved 4. Cooler temp verification 5. Cooler media Trip Blank Information IR Gun Ice (Bag) Y or N N/A 1. Sample labels present on bottles 2. Samples preserved properly 3. Sufficient volume/containers recvd for analysis: 4. Condition of sample 5. Sample recvd within HT 6. Dates/Times/IDs on COC match Sample Label 7. VOCs have headspace Intact 5.1 5 1. Trip Blank present / cooler 2. Trip Blank listed on COC 3. Type Of TB Received W or S N/A 8. Bottles received for unspecified tests 9. Compositing instructions clear 10. Voa Soil Kits/Jars received past 48hrs? 11. % Solids Jar received? 12. Residual Chlorine Present? Misc. Information Number of Encores: 25-Gram 5-Gram Number of 5035 Field Kits: Number of Lab Filtered Metals: Test Strip Lot #s: ph 0-3 230315 ph 10-12 219813A Other: (Specify) Residual Chlorine Test Strip Lot #: Comments SM001 Rev. Date 05/24/17 Technician: PETERH Date: 7/19/2018 3:05:00 PM Reviewer: Date: : Chain of Custody Page 2 of 2 17 of 26

6 SGS North America Inc. Orlando, FL Section 6 MS Semi-volatiles QC Data Summaries Includes the following where applicable: Method Blank Summaries Blank Spike Summaries Matrix Spike and Duplicate Summaries 18 of 26

Method Blank Summary Page 1 of 2 Job Number: Account: Project: TETRFLC Tetra Tech Satellite Beach PFC Sample File ID DF Analyzed By Prep Date Prep Batch Analytical Batch OP70986-MB 2Q17575.D 1 07/24/18 NG 07/20/18 OP70986 S2Q300 The QC reported here applies to the following samples: -1, -2, -3, -4 Method: EPA 537M BY ID 6.1.1 6 CAS No. Compound Result RL MDL Units Q 375-22-4 Perfluorobutanoic acid ND 0.015 0.0038 ug/l 2706-90-3 Perfluoropentanoic acid ND 0.0077 0.0029 ug/l 307-24-4 Perfluorohexanoic acid ND 0.0077 0.0019 ug/l 375-85-9 Perfluoroheptanoic acid ND 0.0077 0.0019 ug/l 335-67-1 Perfluorooctanoic acid ND 0.0077 0.0019 ug/l 375-95-1 Perfluorononanoic acid ND 0.0077 0.0019 ug/l 335-76-2 Perfluorodecanoic acid ND 0.0077 0.0019 ug/l 2058-94-8 Perfluoroundecanoic acid ND 0.0077 0.0019 ug/l 307-55-1 Perfluorododecanoic acid ND 0.0077 0.0029 ug/l 72629-94-8 Perfluorotridecanoic acid ND 0.0077 0.0019 ug/l 376-06-7 Perfluorotetradecanoic acid ND 0.0077 0.0019 ug/l 375-73-5 Perfluorobutanesulfonic acid ND 0.0077 0.0019 ug/l 2706-91-4 Perfluoropentanesulfonic acid ND 0.0077 0.0019 ug/l 355-46-4 Perfluorohexanesulfonic acid ND 0.0077 0.0019 ug/l 375-92-8 Perfluoroheptanesulfonic acid ND 0.0077 0.0019 ug/l 1763-23-1 Perfluorooctanesulfonic acid ND 0.0077 0.0029 ug/l 68259-12-1 Perfluorononanesulfonic acid ND 0.0077 0.0019 ug/l 335-77-3 Perfluorodecanesulfonic acid ND 0.0077 0.0019 ug/l 754-91-6 PFOSA ND 0.0077 0.0019 ug/l 2355-31-9 MeFOSAA ND 0.038 0.0077 ug/l 2991-50-6 EtFOSAA ND 0.038 0.0077 ug/l 757124-72-44:2 Fluorotelomer sulfonate ND 0.015 0.0038 ug/l 27619-97-2 6:2 Fluorotelomer sulfonate ND 0.015 0.0038 ug/l 39108-34-4 8:2 Fluorotelomer sulfonate ND 0.015 0.0038 ug/l CAS No. ID Standard Recoveries Limits 13C4-PFBA 109% 30-140% 13C5-PFPeA 108% 40-140% 13C5-PFHxA 108% 50-150% 13C4-PFHpA 114% 50-150% 13C8-PFOA 137% 50-150% 13C9-PFNA 131% 50-150% 13C6-PFDA 106% 50-150% 13C7-PFUnDA 93% 50-150% 19 of 26

Method Blank Summary Page 2 of 2 Job Number: Account: Project: TETRFLC Tetra Tech Satellite Beach PFC Sample File ID DF Analyzed By Prep Date Prep Batch Analytical Batch OP70986-MB 2Q17575.D 1 07/24/18 NG 07/20/18 OP70986 S2Q300 The QC reported here applies to the following samples: -1, -2, -3, -4 Method: EPA 537M BY ID 6.1.1 6 CAS No. ID Standard Recoveries Limits 13C2-PFDoDA 88% 50-150% 13C2-PFTeDA 93% 40-150% 13C3-PFBS 104% 50-150% 13C3-PFHxS 114% 50-150% 13C8-PFOS 112% 50-150% 13C8-FOSA 116% 30-140% d3-mefosaa 88% 50-150% 13C2-4:2FTS 102% 50-150% 13C2-6:2FTS 117% 50-150% 13C2-8:2FTS 98% 50-150% 20 of 26

Blank Spike Summary Page 1 of 2 Job Number: Account: Project: TETRFLC Tetra Tech Satellite Beach PFC Sample File ID DF Analyzed By Prep Date Prep Batch Analytical Batch OP70986-BS 2Q17574.D 1 07/24/18 NG 07/20/18 OP70986 S2Q300 The QC reported here applies to the following samples: -1, -2, -3, -4 Method: EPA 537M BY ID 6.2.1 6 Spike BSP BSP CAS No. Compound ug/l ug/l % Limits 375-22-4 Perfluorobutanoic acid 0.154 0.162 105 70-130 2706-90-3 Perfluoropentanoic acid 0.154 0.156 101 70-130 307-24-4 Perfluorohexanoic acid 0.154 0.142 92 70-130 375-85-9 Perfluoroheptanoic acid 0.154 0.155 101 71-130 335-67-1 Perfluorooctanoic acid 0.154 0.146 95 74-130 375-95-1 Perfluorononanoic acid 0.154 0.151 98 76-130 335-76-2 Perfluorodecanoic acid 0.154 0.149 97 70-130 2058-94-8 Perfluoroundecanoic acid 0.154 0.160 104 70-130 307-55-1 Perfluorododecanoic acid 0.154 0.176 114 70-130 72629-94-8 Perfluorotridecanoic acid 0.154 0.172 112 70-139 376-06-7 Perfluorotetradecanoic acid 0.154 0.156 101 70-130 375-73-5 Perfluorobutanesulfonic acid 0.136 0.134 98 73-130 2706-91-4 Perfluoropentanesulfonic acid 0.145 0.149 103 70-130 355-46-4 Perfluorohexanesulfonic acid 0.14 0.133 95 74-130 375-92-8 Perfluoroheptanesulfonic acid 0.146 0.158 108 74-130 1763-23-1 Perfluorooctanesulfonic acid 0.142 0.158 111 70-130 68259-12-1 Perfluorononanesulfonic acid 0.148 0.144 97 70-130 335-77-3 Perfluorodecanesulfonic acid 0.148 0.164 110 70-130 754-91-6 PFOSA 0.154 0.159 103 70-131 2355-31-9 MeFOSAA 0.154 0.163 106 70-130 2991-50-6 EtFOSAA 0.154 0.154 100 70-130 757124-72-44:2 Fluorotelomer sulfonate 0.144 0.172 120 70-130 27619-97-2 6:2 Fluorotelomer sulfonate 0.146 0.172 118 70-133 39108-34-4 8:2 Fluorotelomer sulfonate 0.148 0.149 101 70-130 CAS No. ID Standard Recoveries BSP Limits 13C4-PFBA 108% 30-140% 13C5-PFPeA 109% 40-140% 13C5-PFHxA 108% 50-150% 13C4-PFHpA 111% 50-150% 13C8-PFOA 138% 50-150% 13C9-PFNA 133% 50-150% 13C6-PFDA 109% 50-150% 13C7-PFUnDA 98% 50-150% * = Outside of Control Limits. 21 of 26

Blank Spike Summary Page 2 of 2 Job Number: Account: Project: TETRFLC Tetra Tech Satellite Beach PFC Sample File ID DF Analyzed By Prep Date Prep Batch Analytical Batch OP70986-BS 2Q17574.D 1 07/24/18 NG 07/20/18 OP70986 S2Q300 The QC reported here applies to the following samples: -1, -2, -3, -4 Method: EPA 537M BY ID 6.2.1 6 CAS No. ID Standard Recoveries BSP Limits 13C2-PFDoDA 94% 50-150% 13C2-PFTeDA 101% 40-150% 13C3-PFBS 104% 50-150% 13C3-PFHxS 114% 50-150% 13C8-PFOS 116% 50-150% 13C8-FOSA 124% 30-140% d3-mefosaa 90% 50-150% 13C2-4:2FTS 104% 50-150% 13C2-6:2FTS 123% 50-150% 13C2-8:2FTS 105% 50-150% * = Outside of Control Limits. 22 of 26

Matrix Spike Summary Page 1 of 2 Job Number: Account: Project: TETRFLC Tetra Tech Satellite Beach PFC Sample File ID DF Analyzed By Prep Date Prep Batch Analytical Batch OP70986-MS 2Q17579.D 1 07/24/18 NG 07/20/18 OP70986 S2Q300-3 2Q17749.D 1 07/28/18 NG 07/20/18 OP70986 S2Q302 The QC reported here applies to the following samples: -1, -2, -3, -4 Method: EPA 537M BY ID 6.3.1 6-3 Spike MS MS CAS No. Compound ug/l Q ug/l ug/l % Limits 375-22-4 Perfluorobutanoic acid 0.015 U 0.154 0.150 97 70-130 2706-90-3 Perfluoropentanoic acid 0.0077 U 0.154 0.146 95 70-130 307-24-4 Perfluorohexanoic acid 0.0077 U 0.154 0.129 84 70-130 375-85-9 Perfluoroheptanoic acid 0.0077 U 0.154 0.146 95 71-130 335-67-1 Perfluorooctanoic acid 0.0077 U 0.154 0.147 96 74-130 375-95-1 Perfluorononanoic acid 0.0077 U 0.154 0.146 95 76-130 335-76-2 Perfluorodecanoic acid 0.0077 U 0.154 0.136 88 70-130 2058-94-8 Perfluoroundecanoic acid 0.0077 U 0.154 0.149 97 70-130 307-55-1 Perfluorododecanoic acid 0.0077 U 0.154 0.160 104 70-130 72629-94-8 Perfluorotridecanoic acid 0.0077 U 0.154 0.160 104 70-139 376-06-7 Perfluorotetradecanoic acid 0.0077 U 0.154 0.145 94 70-130 375-73-5 Perfluorobutanesulfonic acid 0.0077 U 0.136 0.124 91 73-130 2706-91-4 Perfluoropentanesulfonic acid 0.0077 U 0.145 0.137 95 70-130 355-46-4 Perfluorohexanesulfonic acid 0.0077 U 0.14 0.125 89 74-130 375-92-8 Perfluoroheptanesulfonic acid 0.0077 U 0.146 0.145 99 74-130 1763-23-1 Perfluorooctanesulfonic acid 0.0077 U 0.142 0.151 106 70-130 68259-12-1 Perfluorononanesulfonic acid 0.0077 U 0.148 0.129 87 70-130 335-77-3 Perfluorodecanesulfonic acid 0.0077 U 0.148 0.160 108 70-130 754-91-6 PFOSA 0.0077 U 0.154 0.151 98 70-131 2355-31-9 MeFOSAA 0.038 U 0.154 0.155 101 70-130 2991-50-6 EtFOSAA 0.038 U 0.154 0.146 95 70-130 757124-72-44:2 Fluorotelomer sulfonate 0.015 U 0.144 0.155 108 70-130 27619-97-2 6:2 Fluorotelomer sulfonate 0.015 U 0.146 0.163 112 70-133 39108-34-4 8:2 Fluorotelomer sulfonate 0.015 U 0.148 0.140 95 70-130 CAS No. ID Standard Recoveries MS -3 Limits 13C4-PFBA 130% 117% 30-140% 13C5-PFPeA 126% 116% 40-140% 13C5-PFHxA 130% 122% 50-150% 13C4-PFHpA 132% 131% 50-150% 13C8-PFOA 162%* 126% 50-150% 13C9-PFNA 156%* 134% 50-150% 13C6-PFDA 120% 129% 50-150% 13C7-PFUnDA 107% 108% 50-150% * = Outside of Control Limits. 23 of 26

Matrix Spike Summary Page 2 of 2 Job Number: Account: Project: TETRFLC Tetra Tech Satellite Beach PFC Sample File ID DF Analyzed By Prep Date Prep Batch Analytical Batch OP70986-MS 2Q17579.D 1 07/24/18 NG 07/20/18 OP70986 S2Q300-3 2Q17749.D 1 07/28/18 NG 07/20/18 OP70986 S2Q302 The QC reported here applies to the following samples: -1, -2, -3, -4 Method: EPA 537M BY ID 6.3.1 6 CAS No. ID Standard Recoveries MS -3 Limits 13C2-PFDoDA 107% 125% 50-150% 13C2-PFTeDA 116% 106% 40-150% 13C3-PFBS 129% 121% 50-150% 13C3-PFHxS 143% 107% 50-150% 13C8-PFOS 132% 109% 50-150% 13C8-FOSA 131% 131% 30-140% d3-mefosaa 100% 112% 50-150% 13C2-4:2FTS 133% 122% 50-150% 13C2-6:2FTS 152%* 121% 50-150% 13C2-8:2FTS 113% 100% 50-150% * = Outside of Control Limits. 24 of 26

Duplicate Summary Page 1 of 2 Job Number: Account: Project: TETRFLC Tetra Tech Satellite Beach PFC Sample File ID DF Analyzed By Prep Date Prep Batch Analytical Batch OP70986-DUP 2Q17581.D 1 07/24/18 NG 07/20/18 OP70986 S2Q300-4 2Q17580.D 1 07/24/18 NG 07/20/18 OP70986 S2Q300 The QC reported here applies to the following samples: -1, -2, -3, -4 Method: EPA 537M BY ID 6.4.1 6-4 DUP CAS No. Compound ug/l Q ug/l Q RPD Limits 375-22-4 Perfluorobutanoic acid 0.00631 I 0.00628 J 0 30 2706-90-3 Perfluoropentanoic acid 0.0129 0.0125 3 30 307-24-4 Perfluorohexanoic acid 0.00625 I 0.00638 J 2 30 375-85-9 Perfluoroheptanoic acid 0.00288 I 0.00295 J 2 30 335-67-1 Perfluorooctanoic acid 0.00733 I 0.00773 5 30 375-95-1 Perfluorononanoic acid 0.0077 U ND nc 30 335-76-2 Perfluorodecanoic acid 0.0077 U ND nc 30 2058-94-8 Perfluoroundecanoic acid 0.0077 U ND nc 30 307-55-1 Perfluorododecanoic acid 0.0077 U ND nc 30 72629-94-8 Perfluorotridecanoic acid 0.0077 U ND nc 30 376-06-7 Perfluorotetradecanoic acid 0.0077 U ND nc 30 375-73-5 Perfluorobutanesulfonic acid 0.00615 I 0.00606 J 1 30 2706-91-4 Perfluoropentanesulfonic acid 0.0077 U ND nc 30 355-46-4 Perfluorohexanesulfonic acid 0.00207 I 0.00224 J 8 30 375-92-8 Perfluoroheptanesulfonic acid 0.0077 U ND nc 30 1763-23-1 Perfluorooctanesulfonic acid 0.0228 0.0228 0 30 68259-12-1 Perfluorononanesulfonic acid 0.0077 U ND nc 30 335-77-3 Perfluorodecanesulfonic acid 0.0077 U ND nc 30 754-91-6 PFOSA 0.0077 U ND nc 30 2355-31-9 MeFOSAA 0.038 U ND nc 30 2991-50-6 EtFOSAA 0.038 U ND nc 30 757124-72-44:2 Fluorotelomer sulfonate 0.015 U ND nc 30 27619-97-2 6:2 Fluorotelomer sulfonate 0.015 U ND nc 30 39108-34-4 8:2 Fluorotelomer sulfonate 0.015 U ND nc 30 CAS No. ID Standard Recoveries DUP -4 Limits 13C4-PFBA 110% 100% 30-140% 13C5-PFPeA 109% 99% 40-140% 13C5-PFHxA 113% 107% 50-150% 13C4-PFHpA 129% 117% 50-150% 13C8-PFOA 152%* a 141% 50-150% 13C9-PFNA 147% 136% 50-150% 13C6-PFDA 138% 132% 50-150% 13C7-PFUnDA 82% 79% 50-150% * = Outside of Control Limits. 25 of 26

Duplicate Summary Page 2 of 2 Job Number: Account: Project: TETRFLC Tetra Tech Satellite Beach PFC Sample File ID DF Analyzed By Prep Date Prep Batch Analytical Batch OP70986-DUP 2Q17581.D 1 07/24/18 NG 07/20/18 OP70986 S2Q300-4 2Q17580.D 1 07/24/18 NG 07/20/18 OP70986 S2Q300 The QC reported here applies to the following samples: -1, -2, -3, -4 Method: EPA 537M BY ID 6.4.1 6 CAS No. ID Standard Recoveries DUP -4 Limits 13C2-PFDoDA 74% 73% 50-150% 13C2-PFTeDA 42% 50% 40-150% 13C3-PFBS 103% 99% 50-150% 13C3-PFHxS 103% 99% 50-150% 13C8-PFOS 107% 105% 50-150% 13C8-FOSA 107% 112% 30-140% d3-mefosaa 76% 77% 50-150% 13C2-4:2FTS 106% 100% 50-150% 13C2-6:2FTS 126% 119% 50-150% 13C2-8:2FTS 108% 106% 50-150% (a) Outside control limits. * = Outside of Control Limits. 26 of 26