Document NjwQndQJy56GLog77GO35RMy

Report Prepared by: Report Approved by: NPDES Compliance Sampling Inspection Report PREPA - South Coast Power Plant State Road No. 127, Guayanilla, PR 00656 NPDES Permit: PR0001147 September 14-15, 2022 THUAN TRAN Digitally signed by THUAN TRAN _________________D_a_te_: 2_02_2._11_.0_3_16_:2_8:4_4_-0_4'_00' Thuan Tran, Physical Scientist Date: ______November 03, 2022_______ PHILIP COCUZZA Digitally signed by PHILIP COCUZZA Date: 2022.11.07 08:50:18 -05'00' ________________________________ Phil Cocuzza, Chief Monitoring and Assessments Branch Date: ________________ PREPA - South Coast Power Plant, Guayanilla, PR NPDES Permit: PR0001147 1.0 OBJECTIVE Insp. Dates: September 14-15, 2022 On September 14-15, 2022, at the request of the Caribbean Environmental Protection Division (CEPD), a National Pollutant Discharge Elimination System (NPDES) Compliance Sampling Inspection (CSI) was conducted at the Puerto Rico Electric Power Authority (PREPA) - South Coast Power Plant. The objective of the CSI was to gather information necessary to determine compliance with the requirements and limitations of their NPDES Permit; PR0001147. The NPDES Permit was effective on September 01, 2018 and will expire on August 31, 2023. 2.0 KEY PARTICIPANTS Listed below are key inspection participants and contact information, grouped by organization. U.S. Environmental Protection Agency Thuan Tran, Lead Inspector 732-321-4455 or email: tran.thuan@epa.gov Robert Morrell, Geologist Jose Rivera, Clean Water Act Team Leader Sergio Bosques, Senior Environmental Engineer PREPA - South Coast Power Plant See Attached "Sampling Inspections - EPA" Sign-In Sheet 3.0 FACILITY DESCRIPTION 3.1 General Information PREPA - South Coast Power Plant is located on the south coast of Puerto Rico at State No. 127, Cedros Ward, Guayanilla, Puerto Rico. The steam electric power generating facility is categorized under Standard Industrial Classification (SIC) 4911 for Electric Services and the North American Industry Classification System (NAICS) 221112 for Fossil Fuel Electric Power Generation. PREPA - South Coast Power Plant consists of six steam electric generating units, two (2) 410 megawatts (MW) dual fuel oil/natural gas units for a total of 820 MW, two (2) 85 MW oilfired units (170 MW total), and two (2) 22 MW gas turbine generator power units (44 MW total). To produce electricity, de-ionized water is converted into steam in the boiler. The pressurized superheated steam travels through the turbine spinning the blades. The electricity generated from the turbine is directed to the power grid and is redistributed to where it is needed. As steam flows through the turbine, heat and pressure are lost. The low-heat and lowpressure steam continues to the condenser. Sea water from the Guayanilla Bay is use as non-contact cooling water. As heat is transferred to the sea water, steam condenses and Page 2 of 8 PREPA - South Coast Power Plant, Guayanilla, PR NPDES Permit: PR0001147 Insp. Dates: September 14-15, 2022 collects in the hot well. The non-contact cooling water is directed to the main canal where it discharges to the Guayanilla Bay via Outfall 001. 3.2 Process Information Process wastewater is treated by the On-Site Wastewater Treatment Plant (WWTP). Boiler and Cooling Tower blowdown is pumped to an off-site sludge pond. The supernatant from the sludge pond is pumped into equalization (EQ) tank #2 of the On-Site WWTP. Sodium hydroxide (NaOH) is added to adjust the pH between 9.0 to 10.0 standard units (SU). Backwash from the reverse osmosis treatment system and condensate from the steam turbines are conveyed to EQ tank #1. From the EQ tanks, the process wastewater is pumped into the Nautilus Treatment System at the mixing chamber. A polymer is added to the wastewater, followed by coagulation through aeration, then flocculation of suspended solids and polymer in solution. After adequate mixing, the wastewater is conveyed into the rectangular clarifier chamber for phase separation. The effluent overflows the weir plate into the effluent trough that directs the discharge into the polishing chamber. The effluent from the polishing chamber of the Nautilus Treatment System is pumped into the media filtration tanks. The filtrate is stored in the final effluent tank where pH adjustment is performed with either sulfuric acid (H2SO4) or NaOH to pH range between 6.5 to 9.0 SU. Prior to discharge, the treated effluent is tested for pH, copper, and iron. If the quality control analytical results for the parameters are acceptable, the effluent is discharged to the main canal via Outfall 001f, otherwise, it returns to the head of the On-Site WWTP for treatment. The backwash from the media filtration system is directed to EQ tank #1. Sludge slurry in the rectangular clarifier chamber is pumped to the off-site sludge pond. The accumulated sludge in the sludge pond is removed and disposed of once every 2 years at the municipal landfill. 3.3 Facility Self-Monitoring Information Permit compliance samples are taken by the facility at the designated monitoring locations. Environmental Quality Laboratories, Inc. (EQ Lab.) in Bayamon, Puerto Rico provides the facility with the preserved sample containers, sample labels, and chain of custody. Samples are collected by the facility's personnel for Total Suspended Solids (TSS), Color, Turbidity, Polychlorinated Biphenyls (PCBs), Oil and Grease (O&G), and Metals. The samples are picked up by the courier and transported to EQ Lab. for analysis. 4.0 EPA SAMPLING/INSPECTION ACTIVITIES 4.1 Sampling Activities Outfall 001 and Internal Outfalls 001c and 001e were discharging. A walk-through was conducted to observe and confirm the status of these outfalls as well as other outfalls on the permit. Page 3 of 8 PREPA - South Coast Power Plant, Guayanilla, PR NPDES Permit: PR0001147 Insp. Dates: September 14-15, 2022 An ISCO automatic composite sampler was programmed and set-up to take an aliquot sample every fifteen (15) minutes for twenty-four (24) hours from Internal Outfall 001c monitoring location. After the 24-hour composite sampling event, ninety-six (96) sample aliquots were collected. The composite sample was collected and analyzed for TSS. Grab sample was collected and analyzed for O&G. Grab samples were collected and analyzed from Internal Outfall 001e for TSS, O&G, and Priority Pollutants. Grab samples were collected and analyzed from Outfall 001for Color, Metals (Copper & Zinc), O&G, and PCBs. From Internal Outfall 001c, on-site grab sample was collected and analyzed for pH. For Internal Outfall 001e, on-site grab samples were collected and analyzed for pH, Free Available Chlorine and Total Residual Chlorine. For Outfall 001, on-site grab samples were collected and analyzed for pH, Temperature, Settleable Solids (SS), Dissolved Oxygen (DO), and Total Residual Chlorine (TRC). In addition, an on-site grab sample from the Intake was collected and analyzed for Temperature. All sample containers, preservation techniques, and holding times conformed to USEPA requirements specified in 40 CFR Part 136. All samples were packaged and shipped on ice via United Parcel Service (UPS) to the USEPA Laboratory in Edison, New Jersey for analysis. Chain-of-custody was maintained for all samples. USEPA Laboratory Analytical Data Package is attached. Split samples were collected and given to the facility representative. 4.2 Inspection Activities A NPDES Compliance Sampling Inspection (CSI) at PREPA - South Coast Power Plant was conducted on September 14-15, 2022. During the opening conference, inspector's credential was presented, and business card was provided. All participants signed in on the "Sampling Inspections - EPA" sign-in sheet. It was explained that the purpose of the CSI with supporting on-site activities was to determine if the facility is in compliance with their NPDES Permit, PR0001147. The supporting on-site activities consist of sampling for the permitted parameters from Outfall 001 and Internal Outfalls 001c and 001e, reviewing and evaluating the monitoring locations, a tour of the On-Site Wastewater Treatment Plant, observing and confirming the outfalls in the permit, and reviewing the inspection findings in the 2018 NPDES Compliance Sampling Inspection report. During the closing conference, the inspection activities were briefed, and split samples were provided to the facility representatives. On-site sample results and concerns that were discovered or observed during the inspection were communicated to the facility representatives. Page 4 of 8 PREPA - South Coast Power Plant, Guayanilla, PR NPDES Permit: PR0001147 4.3 Deviations and/or Environmental Conditions Insp. Dates: September 14-15, 2022 Several issues from the 2018 NPDES Compliance Sampling Inspection were not addressed (Refer to Section 6.2 Inspection Findings). During the walk-through, it was confirmed that Outfalls 002 and 003 were not discharging as well as Internal Outfalls 001b and 001g. In addition, the facility representatives indicated that there was a possibility that Internal Outfall 001f could discharge depending on the outcome of the quality control sample results for pH, copper (Cu), and iron (Fe). As a result of the elevated Fe concentration, no discharge occurred from Internal Outfall 001f. 5.0 ANALYTICAL RESULTS Outfall 001 - Guayanilla Bay September 14-15, 2022 Parameter Units Permit Limit Effluent Flow MGD 751.5 (Daily Maximum) Color Pt-Co Units Shall not be altered by other than natural causes. Copper ug/l Monitor Only Dissolved Oxygen mg/l Shall not contain less than 4.0 mg/l. Oil & Grease mg/l The waters of Puerto Rico shall be substantially free from floating non-petroleum oil and grease as well as petroleum derived oils and grease. pH standard Minimum 7.3 units Maximum 8.5 Polychlorinated ug/l Biphenyls (PCBs) There shall be no discharge of Polychlorinated Biphenyl compounds such as those commonly used for transformer fluids. Solids and Other Matter The waters of Puerto Rico shall not contain floating debris, scum, or other floating materials attributable to the discharge in amounts sufficient to be unsightly or deleterious to the existing or designated uses of the waterbody. Suspended, Colloidal ml/l or Settleable Solids Solids from wastewater source shall not cause deposition in or be deleterious to the existing or designated uses of the waterbody. Temperature F (C) No more than four (4) days per year the discharge temperature will exceed 106F (41.1C). Temperature, Diff. F (C) In such four events the difference between intake water temperature and the Discharge temperature shall not exceed 18F (10C). Zinc ug/l Monitor Only Notes: Color and Turbidity samples exceeded holding time. U- The analyte was not detected at or above the Reporting Limit. J- The identification of the analyte is acceptable; the reported value is an estimate Intake Temperature: 31C Temperature conversion: F = 1.8 (C) + 32 EPA Result Was Not Provided <5 U J 6.0 U 8.07 U Scum Observed (See Photos #5 & #6 of Attachment Section) Zero 47C 16C U J Page 5 of 8 PREPA - South Coast Power Plant, Guayanilla, PR NPDES Permit: PR0001147 Insp. Dates: September 14-15, 2022 Internal Outfall 001c September 14-15, 2022 Parameter Units Permit Limit Flow gpd Estimate Total Suspended Solids mg/l 30.0 - 100.0 pH SU Shall always lie between 6.0 - 9.0 Oil & Grease mg/l 15.0 - 20.0 Note: U- The analyte was not detected at or above the Reporting Limit. EPA Result Was Not Provided U 7.83 U Internal Outfall 001e September 14-15, 2022 Parameter Units Permit Limit EPA Result Flow Gpd Estimate Was Not Provided Free Available Chlorine mg/l 0.2 - 0.5 0.02 Total Residual Chlorine mg/l 0.2 - 0.2 0.13 Total Chromium mg/l 0.2 - 0.2 U Total Zinc mg/l 1.0 - 2.0 U Oil & Grease mg/l 15.0 - 20.0 U 126 Priority Pollutants* ug/l No detectable amount allowed. U L pH SU Shall always lie between 6.0 - 9.0 7.63 Polychlorinated ug/l Biphenyls (PCBs) (ug/l) There shall be no discharge of U Polychlorinated Biphenyl compounds such as those commonly used for transformer fluids. Total Suspended Solids mg/l 30.0 - 100.0 U Note: 126 Priority Pollutant* consist of Metals*, VOAs*, NVOAS*, PCBs*, and Pesticides. U- The analyte was not detected at or above the Reporting Limit. L- The identification of the analyte is acceptable; the reported value may be biased low. 6.0 FINDINGS 6.1 Sampling Result Findings The EPA analytical results obtained during this inspection show the following parameter(s) as being outside of the acceptable limits: 6.1.1 According to the NPDES Permit for Outfall 001, temperature has an effluent limitation as stated, "No more than four (4) days per year the discharge temperature will exceed 106F (41.1C). In such four events the difference between intake water temperature and the Discharge temperature shall not exceed 18F (10C)." The analytical result for temperature was determined to be 47Celsius. Page 6 of 8 PREPA - South Coast Power Plant, Guayanilla, PR NPDES Permit: PR0001147 6.2 Inspection Findings Insp. Dates: September 14-15, 2022 In addition to the on-site analytical results, an inspection of the facility was conducted as discussed in Section 4.2. The following issues/concerns from the 2018 NPDES Compliance Sampling Inspection have not be addressed. 6.2.1 Prior to collecting the Polychlorinated Biphenyls (PCBs) sample, a chlorine test was conducted to determine if residual chlorine was present in the discharging effluent. The result shows chlorine present from. Since aldrin is collected as part of the PCB compounds, Under Section 9.2 - Sample Collection, Preservation, and Handling for EPA Method 608: Organochlorine Pesticides and PCBs, it states, "if aldrin is to be determined, sodium thiosulfate must be added to the sample to remove residual chlorine." 6.2.2 Oil & Grease (O&G) sample is collected using a sampling container. From the sampling container, the water sample is transferred into a glass bottle. This is incorrect. Samples collected for O&G should be taken in a manner that prevents biased results. Therefore, sample for O&G should be collected directly from the waste stream into the sample container. According to Section 8: Sample Collection, Preservation, and Storage in the EPA Method 1664, Revision A: N-Hexane Extractable Material (HEM; Oil and Grease) and Silica Gel Treated N-Hexane Extractable Material (SGTHEM; Non-polar Material) by Extraction and Gravimetry, it states, "The high probability that extractable matter may adhere to sampling equipment (ex. bucket, tubing) and result in measurements that are biased low precludes the collection of composite samples for determination of oil and grease. Therefore, samples must be collected as grab samples. If a composite measurement is required, individual grab samples collected at prescribed time intervals must be analyzed separately and the concentrations averaged." 7.0 ATTACHMENTS Attachment #1. An aerial view shows the perimeter of the power plant. Attachment #2. "Sampling Inspections - EPA" sign-in for the 9/14-15/22 NPDES CSI. Attachment #3. An overview map shows the various operational areas in the power plant. Attachment #4. An overview map points the locations of the main and internal Outfalls. Attachment #5. A water balance diagram shows where fresh and sea waters are distributed. Attachment #6. Samples are transcribed onto the USEPA chain of custody for analysis. Attachment #7: USEPA Analytical Results are obtained from the 9/14-15/22 NPDES CSI. Page 7 of 8 PREPA - South Coast Power Plant, Guayanilla, PR NPDES Permit: PR0001147 8.0 PHOTOGRAPHS Insp. Dates: September 14-15, 2022 Photo #1. Samples were collected from Outfall 001 discharge canal. Photo #2. Samples were collected from Internal Outfall 001c monitoring location. Photo #3. Samples were collected from Internal Outfall 001e monitoring location. Photo #4. A sample for temperature was taken at the Intake monitoring point. Photo #5. Floating scum was observed in Outfall 001 main canal. Photo #6. Solids were observed in the water column after Outfall 001 monitoring location. Page 8 of 8 PREPA - South Coast Power Plant, Guayanilla, PR NPDES Permit: PR0001147 Insp. Dates: September 14-15, 2022 7.0 Attachments Attachment #1. An aerial view shows the perimeter of PREPA - South Coast Power Plant besides the Guayanilla Bay. AERIAL PHOTO SOUTH COAST POWER PLANT SITE 1:5,626 Attachment #2. EPA & PREPA Representatives took part in the September 14-15, 2022 NPDES CSI. GOBIERNO DE PUERTO RICO AUTORIDAD DE ENERGfA ELECTRICA Sampling Inspections - EPA South Coast Power Plant September 14, 2022 Name lfi,r/fto.. AC~Jldo WtidIJ/AaJtIJ/wp Position/Area Email Signature I~()lfi~~J..:I~ ~~PA~ Ilt1Jrf(.~C8feI,d O\(c#;).r"~. .::J.AJAn .C~ C1/JG. V'?'?~4,f~.Ht:I/~c h AI. ;';;: ~o/t--. ~- I//~""~A~.O~"~-Ah ~c~6' ~~~~~ ~". c1J;,1 ,~ r--- /~_J;2~ v=r:h o .u ---fr;e;.-.; CPIJ ~N(fI.a/;.1d;. !fjUt/ A.&tu.Je-~rnp fRGfJA I CS h)~c~r#.RIJ lkRf)./, ,; I- /: . w. vJL~.-~ SJ IWJ't ~~~7/ r!~.f ~,p'f 9' .la ,it'.e, Iroa_u."'r":rh () v, L V 1)( V 'V'/ Apartado 364267 San Juan, Puerto Rico 00936-4267 "Somas un patrono con igualdad de oportunidades en el empleo y no discriminamos par raz6n de raza, color, sexo, edad, origen social 0 nacional, condiclon social, afiliaci6n polftica, ideas polfticas 0 religiosas; par ser victima 0 ser percibida(o) como victima de violencia domestica, agresi6n sexual 0 acecho, sin importar estado civil, orientacion sexual, identidad de genera 0 estatus migratorio; per impedimento fisico, mental 0 ambos, por condici6n de veterano(a) 0 por informaci6n genetica." Attachment #3. An overview map shows the various operational areas within PREPA - South Coast Power Plant. (, ~ ~ .t" oCJ) o C -I ::t: o >CJ) -I OmJ CJ) -I s: >z > \1 Gm> :is: mz -I o "'tJ :::tI >o :::! o 350 700 m CJ) "r't-J SCALE IN FEET > Z FIGURE 4-2 SOUTH COAST POWER PLANT SITE MAP .Attachment #4. An overview map shows the locations of the main and internal Outfalls within PREPA - South Coast Power Plant. " PROTOCOLO DE MUESTREO Y ANALISIS NPDES Y TRI LOCALIZACION PUNTOS DE MUESTREO Intake Unlit 3 e 4 ---lotak. Untl. ~ e 6 / ~ Guoyonillo *-En aspera porque la EPA establezca frecuencia y parametros a muestrear. - -1-------------------------------------------------------------------- Revision XIV 12 de enero 2017 FUIIOil ._ S&'vi~ Pump. ~~IO'OQ. 'No.1. lreatmon' Tonk' rON' o v ~ o v .... A.. QIv Q. o q~ OI'lilol. Tonk Plan! _ Paqina 1.1 Unit 3 & 4 0.41 MGD Blowdown (1/mo/tower) Blowoff Unit 3-6 0.49 MGD Guayanilla Bay Seawater Intake 871 MGD Screen Wash Water Screens Unit 5 & 6 Condensers 001b SW 001c 001g 001e Separator 2 Separator 3 Separator 4 Miscelaneous Water Use ** Well Water Evaporation And Drift 0.62 MGD Cooling Towers 3 & 4, 5 & 6 1 MGD Sanitary Uses 0.02 MGD SW Equipment Cooling Unit 3 & 4 0.055 MGD SW 0.043 MGD Onsite Collection Systems Removal and Disposal Units 3-5 MultiStep Destillation Plant Ecoelctrica 1 MGD Demineralization Regeneration Condensers Condensate Polishers Regeneration Wastes Evaporation Boilers Cleaning * Steam Unit 5 &6 0.032 MGD Separator 5 SW SW Unit 6 0.02 MGD Fuel Oil Heaters Condensations SW Tank Farm Dikes Aquashield SW Sedimentation Basin SW Separator 1 001f 0.864 MGD MAX WWTP SW 001d 001h Stormwater Detention Basin SW Separator 6 Light Destilate Loading/Unloading Area Sludge for Disposal Outfall 002 (stormwater only) Outfall 003 (stormwater only) Outfall 001A SW 751.5 MGD +Stormwater FIGURE 2-4 COSTA SUR POWER PLANT SW = Stormwater * Includes: ---- = Intermitent Discharge Air Preheater Cleaning WATER BALANCE DIAGRAM Fan Wash Boiler Fireside Cleaning Attachment #5. Fresh and sea waters are distributed to the various operational areas at the PREPA - South Coast Power Plant. Boiler Chemical Cleaning Rev. March 24, 2014 ** Includes: Washdown Samplers Safety Showers Instrumentation Equipment Drains Attachment #6. Samples were shipped via UPS to the USEPA Laboratory in Edison, New Jersey for analysis. Attachment #7. Analytical data for the samples collected from the 9/14-15/2022 NPDES CSI. UNITED STATES ENVIRONMENTAL PROTECTION AGENCY Region 2 Laboratory 2890 Woodbridge Avenue Edison , New Jersey 08837 732-906-6886 Phone 732-906-6165 Fax October 03, 2022 Philip Cocuzza Monitoring & Assessment Branch LSASD/MAB Edison, NJ 08837 RE: PREPA South Coast Power Plant - 2209015 Enclosed are the results of analyses for samples received by the laboratory on 09/16/2022. The signature below reflects the laboratory's approval of the reported results. If you have any questions concerning this report, please refer to Project Number 2209015 and contact the laboratory. Sincerely, John R. Bourbon Chief, LSASD/LB Project Narrative: UNITED STATES ENVIRONMENTAL PROTECTION AGENCY Region 2 Laboratory Final Report Project: PREPA South Coast Power Plant - 2209015 Project Number: 2209015 The National Environmental Laboratory Accreditation Conference Institute (TNI) is a voluntary environmental laboratory accreditation association of State and Federal agencies. TNI established and promoted a National Environmental Laboratory Accreditation Program (NELAP) that provides a uniform set of standards for the generation of environmental data that are of known and defensible quality. The EPA Region 2 Laboratory is NELAP accredited. The Laboratory tests that are accredited have met all the requirements established under the TNI Standards. Condition Comments None Comment(s): The "Sample Analysis Date and Time" is included in the results section for any analyte with a prescribed holding time of 72 hours or less. Note: On the pesticide portion, only MS was extracted and analyzed because the MSD sample bottle was broken during shipment and no extra sample was available to replace. Data Qualifier(s): U- The analyte was not detected at or above the Reporting Limit. J- The identification of the analyte is acceptable; the reported value is an estimate. K- The identification of the analyte is acceptable; the reported value may be biased high. L- The identification of the analyte is acceptable; the reported value may be biased low. NJ- There is presumptive evidence that the analyte is present; the analyte is reported as a tentative identification. The reported value is an estimate. U.S.E.P.A Region 2 Laboratory NOTE: The results recorded in this report relate only to the samples as received on the date and at the time noted Reported: 10/3/2022 Page 1 of 41 UNITED STATES ENVIRONMENTAL PROTECTION AGENCY Region 2 Laboratory Final Report Project: PREPA South Coast Power Plant - 2209015 Project Number: 2209015 Reporting Limit(s): The Laboratory was able to achieve the standard laboratory reporting limits, where applicable, for each analyte requested except for the following analyte(s): NVOA GCMS The reporting level of 5.00 ug/L was raised to 30 ug/L for the following analyte(s): 4,6-Dinitro-2-Methylphenol, Pentachlorophenol for the following samples: 2209015-02 The reporting level of 5.00 ug/L was raised to 50 ug/L for the following analyte(s): 2,4-Dinitrophenol for the following samples: 2209015-02 SUMMARY REPORT FOR SAMPLES Field ID Outfall 001 Internal Outfall 001e TRIP BLANK Outfall 001c - Grab Outfall 001c - Comp. Laboratory ID 2209015-01 2209015-02 2209015-03 2209015-04 2209015-05 Matrix Aqueous Aqueous Aqueous Aqueous Aqueous Date Sampled 09/15/2022 09:44 09/15/2022 10:22 09/15/2022 10:07 09/15/2022 10:57 09/15/2022 12:26 Date Received 09/16/2022 10:30 09/16/2022 10:30 09/16/2022 10:30 09/16/2022 10:30 09/16/2022 10:30 U.S.E.P.A Region 2 Laboratory NOTE: The results recorded in this report relate only to the samples as received on the date and at the time noted Reported: 10/3/2022 Page 2 of 41 UNITED STATES ENVIRONMENTAL PROTECTION AGENCY Region 2 Laboratory Final Report Project: PREPA South Coast Power Plant - 2209015 Project Number: 2209015 Analysis 608.3 PCB Aroclors NPDES 608.3 Pesticides/PCBs-NPDES 624.1 VOA EPA-NPDES 625.1 SVOA NPDES Color Mercury Metals ICP TAL NPDES/DW Oil & Grease Residue, Non-Filterable SUMMARY REPORT FOR METHODS Method EPA 608.3 SOP C-91 Rev 4.3 EPA 608.3 SOP C-91 Rev 4.3 EPA 624.1 SOP C-89 Rev 3.6 EPA 625.1 SOP C-90 Rev 3.8 SM 2120 SOP C-47 Rev 3.6 EPA 245.1 SOP C-110 Rev 2.7 EPA 200.7 SOP C-109 Rev 3.6 EPA 1664A SOP C-126 Rev 1.6 SM 2540D SOP C-33 Rev 3.7 Certification NELAP NELAP NELAP NELAP NELAP NELAP NELAP NELAP NELAP Matrix Aqueous Aqueous Aqueous Aqueous Aqueous Aqueous Aqueous Aqueous Aqueous U.S.E.P.A Region 2 Laboratory NOTE: The results recorded in this report relate only to the samples as received on the date and at the time noted Reported: 10/3/2022 Page 3 of 41 UNITED STATES ENVIRONMENTAL PROTECTION AGENCY Region 2 Laboratory Final Report Project: PREPA South Coast Power Plant - 2209015 Project Number: 2209015 Analyte Field ID: Outfall 001 PCB Aroclors GC Aroclor 1016 Aroclor 1221 Aroclor 1232 Aroclor 1242 Aroclor 1248 Aroclor 1254 Aroclor 1260 GC - Sanitary Oil & Grease Metals ICP Copper Zinc Sanitary Result Qualifier Reporting Limit Units Batch Sample ID: 2209015-01 Date and Time of Analysis* --- U 0.030 ug/L B209103 --- U 0.060 ug/L B209103 --- U 0.030 ug/L B209103 --- U 0.030 ug/L B209103 --- U 0.030 ug/L B209103 --- U 0.030 ug/L B209103 --- U 0.030 ug/L B209103 --- U 6.60 mg/L B209121 --- U J 10.0 ug/L B209117 --- U J 20.0 ug/L B209117 Color Field ID: Internal Outfall 001e VOA GCMS Chloromethane Vinyl Chloride Bromomethane Chloroethane Trichlorofluoromethane 1,1-Dichloroethene Methylene Chloride Acrylonitrile trans-1,2-Dichloroethene 1,1-Dichloroethane Chloroform 1,1,1-Trichloroethane <5 5.00 Color B209094 09/16/2022 11:45 Units Sample ID: 2209015-02 --- U 5.00 ug/L B209108 --- U 5.00 ug/L B209108 --- U 5.00 ug/L B209108 --- U 5.00 ug/L B209108 --- U 5.00 ug/L B209108 --- U 5.00 ug/L B209108 --- U 5.00 ug/L B209108 --- U 5.00 ug/L B209108 --- U 5.00 ug/L B209108 --- U 5.00 ug/L B209108 --- U 5.00 ug/L B209108 --- U 5.00 ug/L B209108 U.S.E.P.A Region 2 Laboratory NOTE: The results recorded in this report relate only to the samples as received on the date and at the time noted Reported: 10/3/2022 Page 4 of 41 UNITED STATES ENVIRONMENTAL PROTECTION AGENCY Region 2 Laboratory Final Report Project: PREPA South Coast Power Plant - 2209015 Project Number: 2209015 Analyte Field ID: Internal Outfall 001e VOA GCMS Carbon Tetrachloride 1,2-Dichloroethane Benzene Trichloroethene 1,2-Dichloropropane Bromodichloromethane cis-1,3-Dichloropropene Toluene trans-1,3-Dichloropropene 1,1,2-Trichloroethane Tetrachloroethene Dibromochloromethane Chlorobenzene Ethylbenzene Bromoform 1,1,2,2-Tetrachloroethane 1,3-Dichlorobenzene 1,4-Dichlorobenzene 1,2-Dichlorobenzene NVOA GCMS Acenaphthene Acenaphthylene Anthracene Benzo(A)Anthracene Benzo(A)Pyrene Benzo(B)Fluoranthene Benzo(G,H,I)Perylene Benzo(K)Fluoranthene Chrysene Result Qualifier Reporting Limit Units Batch Sample ID: 2209015-02 Date and Time of Analysis* --- U 5.00 ug/L B209108 --- U 5.00 ug/L B209108 --- U 5.00 ug/L B209108 --- U 5.00 ug/L B209108 --- U 5.00 ug/L B209108 --- U 5.00 ug/L B209108 --- U 5.00 ug/L B209108 --- U 5.00 ug/L B209108 --- U 5.00 ug/L B209108 --- U 5.00 ug/L B209108 --- U 5.00 ug/L B209108 --- U 5.00 ug/L B209108 --- U 5.00 ug/L B209108 --- U 5.00 ug/L B209108 --- U 5.00 ug/L B209108 --- U 5.00 ug/L B209108 --- U 5.00 ug/L B209108 --- U 5.00 ug/L B209108 --- U 5.00 ug/L B209108 --- U 4.90 ug/L B209096 --- U 4.90 ug/L B209096 --- U 4.90 ug/L B209096 --- U 4.90 ug/L B209096 --- U 4.90 ug/L B209096 --- U 4.90 ug/L B209096 --- U 4.90 ug/L B209096 --- U 4.90 ug/L B209096 --- U 4.90 ug/L B209096 U.S.E.P.A Region 2 Laboratory NOTE: The results recorded in this report relate only to the samples as received on the date and at the time noted Reported: 10/3/2022 Page 5 of 41 UNITED STATES ENVIRONMENTAL PROTECTION AGENCY Region 2 Laboratory Final Report Project: PREPA South Coast Power Plant - 2209015 Project Number: 2209015 Analyte Field ID: Internal Outfall 001e NVOA GCMS Dibenzo(A,H)Anthracene Fluoranthene Fluorene Indeno(1,2,3-Cd)Pyrene Naphthalene Phenanthrene 1,2,4-Trichlorobenzene 2,4,6-Trichlorophenol 2,4-Dichlorophenol 2,4-Dimethylphenol 2,4-Dinitrotoluene 2,6-Dinitrotoluene 2,4-Dinitrophenol 2-Chloronaphthalene 2-Chlorophenol 2-Nitrophenol 3,3'- Dichlorobenzidine 4,6-Dinitro-2-Methylphenol 4-Bromophenyl-Phenylether 4-Chloro-3-Methylphenol 4-Chlorophenyl-Phenylether 4-Nitrophenol Bis(-2-Chloroethoxy)Methane Bis(2-Chloroethyl)Ether Bis(2-Chloroisopropyl)Ether Bis(2-Ethylhexyl)Phthalate Butylbenzylphthalate Azobenzene Diethylphthalate Result Qualifier Reporting Limit Units Batch Sample ID: 2209015-02 Date and Time of Analysis* --- U 4.90 ug/L B209096 --- U 4.90 ug/L B209096 --- U 4.90 ug/L B209096 --- U 4.90 ug/L B209096 --- U 4.90 ug/L B209096 --- U 4.90 ug/L B209096 --- U 4.90 ug/L B209096 --- U L 4.90 ug/L B209096 --- U L 4.90 ug/L B209096 --- U L 4.90 ug/L B209096 --- U 4.90 ug/L B209096 --- U 4.90 ug/L B209096 --- U 49.0 ug/L B209096 --- U 4.90 ug/L B209096 --- U L 4.90 ug/L B209096 --- U L 4.90 ug/L B209096 --- U 4.90 ug/L B209096 --- U 29.4 ug/L B209096 --- U 4.90 ug/L B209096 --- U L 4.90 ug/L B209096 --- U 4.90 ug/L B209096 --- U 4.90 ug/L B209096 --- U 4.90 ug/L B209096 --- U 4.90 ug/L B209096 --- U 4.90 ug/L B209096 --- U 4.90 ug/L B209096 --- U 4.90 ug/L B209096 --- U 4.90 ug/L B209096 --- U 4.90 ug/L B209096 U.S.E.P.A Region 2 Laboratory NOTE: The results recorded in this report relate only to the samples as received on the date and at the time noted Reported: 10/3/2022 Page 6 of 41 UNITED STATES ENVIRONMENTAL PROTECTION AGENCY Region 2 Laboratory Final Report Project: PREPA South Coast Power Plant - 2209015 Project Number: 2209015 Analyte Field ID: Internal Outfall 001e NVOA GCMS Dimethyl Phthalate Di-N-Butyl Phthalate Di-N-Octyl Phthalate Hexachlorobenzene Hexachlorobutadiene Hexachlorocyclopentadiene Hexachloroethane Isophorone Nitrobenzene N-Nitrosodimethylamine N-Nitroso-Di-N-Propylamine N-Nitrosodiphenylamine Pentachlorophenol Phenol Pyrene Pest/PCBs GC alpha-BHC gamma-BHC (Lindane) beta-BHC delta-BHC Heptachlor Aldrin Heptachlor epoxide Endosulfan I 4,4'-DDE Dieldrin Endrin 4,4'-DDD Endosulfan II Result Qualifier Reporting Limit Units Batch Sample ID: 2209015-02 Date and Time of Analysis* --- U L 4.90 ug/L B209096 --- U 4.90 ug/L B209096 --- U 4.90 ug/L B209096 --- U 4.90 ug/L B209096 --- U 4.90 ug/L B209096 --- U J 4.90 ug/L B209096 --- U 4.90 ug/L B209096 --- U 4.90 ug/L B209096 --- U 4.90 ug/L B209096 --- U 4.90 ug/L B209096 --- U 4.90 ug/L B209096 --- U 4.90 ug/L B209096 --- U 29.4 ug/L B209096 --- U L 4.90 ug/L B209096 --- U 4.90 ug/L B209096 --- U 0.003 ug/L B209103 --- U 0.003 ug/L B209103 --- U 0.003 ug/L B209103 --- U 0.003 ug/L B209103 --- U 0.003 ug/L B209103 --- U 0.003 ug/L B209103 --- U 0.003 ug/L B209103 --- U 0.003 ug/L B209103 --- U 0.005 ug/L B209103 --- U 0.005 ug/L B209103 --- U 0.005 ug/L B209103 --- U 0.005 ug/L B209103 --- U 0.005 ug/L B209103 U.S.E.P.A Region 2 Laboratory NOTE: The results recorded in this report relate only to the samples as received on the date and at the time noted Reported: 10/3/2022 Page 7 of 41 UNITED STATES ENVIRONMENTAL PROTECTION AGENCY Region 2 Laboratory Final Report Project: PREPA South Coast Power Plant - 2209015 Project Number: 2209015 Analyte Field ID: Internal Outfall 001e Pest/PCBs GC 4,4'-DDT Endrin aldehyde Endosulfan sulfate Toxaphene Chlordane Aroclor 1016 Aroclor 1221 Aroclor 1232 Aroclor 1242 Aroclor 1248 Aroclor 1254 Aroclor 1260 GC - Sanitary Oil & Grease Metals ICP Antimony Arsenic Beryllium Cadmium Chromium Copper Lead Nickel Selenium Silver Thallium Zinc Result Qualifier Reporting Limit Units Batch Sample ID: 2209015-02 Date and Time of Analysis* --- U 0.005 ug/L B209103 --- U 0.005 ug/L B209103 --- U 0.005 ug/L B209103 --- U 0.195 ug/L B209103 --- U 0.065 ug/L B209103 --- U 0.033 ug/L B209103 --- U 0.065 ug/L B209103 --- U 0.033 ug/L B209103 --- U 0.033 ug/L B209103 --- U 0.033 ug/L B209103 --- U 0.033 ug/L B209103 --- U 0.033 ug/L B209103 --- U 6.30 mg/L B209121 --- U 20.0 ug/L B209117 --- U 8.00 ug/L B209117 --- U 3.00 ug/L B209117 --- U 3.00 ug/L B209117 --- U 5.00 ug/L B209117 --- U 10.0 ug/L B209117 --- U 8.00 ug/L B209117 --- U 20.0 ug/L B209117 --- U 20.0 ug/L B209117 --- U 5.00 ug/L B209117 --- U 20.0 ug/L B209117 --- U 20.0 ug/L B209117 U.S.E.P.A Region 2 Laboratory NOTE: The results recorded in this report relate only to the samples as received on the date and at the time noted Reported: 10/3/2022 Page 8 of 41 UNITED STATES ENVIRONMENTAL PROTECTION AGENCY Region 2 Laboratory Final Report Project: PREPA South Coast Power Plant - 2209015 Project Number: 2209015 Analyte Field ID: Internal Outfall 001e Mercury CVAA Mercury Sanitary Total Suspended Solids Field ID: TRIP BLANK VOA GCMS Chloromethane Vinyl Chloride Bromomethane Chloroethane Trichlorofluoromethane 1,1-Dichloroethene Methylene Chloride Acrylonitrile trans-1,2-Dichloroethene 1,1-Dichloroethane Chloroform 1,1,1-Trichloroethane Carbon Tetrachloride 1,2-Dichloroethane Benzene Trichloroethene 1,2-Dichloropropane Bromodichloromethane cis-1,3-Dichloropropene Toluene trans-1,3-Dichloropropene 1,1,2-Trichloroethane Tetrachloroethene Dibromochloromethane Result Qualifier Reporting Limit Units Batch Sample ID: 2209015-02 Date and Time of Analysis* --- U 0.050 ug/L B209126 --- U 10.0 mg/L B209115 Sample ID: 2209015-03 --- U 5.00 ug/L B209108 --- U 5.00 ug/L B209108 --- U 5.00 ug/L B209108 --- U 5.00 ug/L B209108 --- U 5.00 ug/L B209108 --- U 5.00 ug/L B209108 --- U 5.00 ug/L B209108 --- U 5.00 ug/L B209108 --- U 5.00 ug/L B209108 --- U 5.00 ug/L B209108 --- U 5.00 ug/L B209108 --- U 5.00 ug/L B209108 --- U 5.00 ug/L B209108 --- U 5.00 ug/L B209108 --- U 5.00 ug/L B209108 --- U 5.00 ug/L B209108 --- U 5.00 ug/L B209108 --- U 5.00 ug/L B209108 --- U 5.00 ug/L B209108 --- U 5.00 ug/L B209108 --- U 5.00 ug/L B209108 --- U 5.00 ug/L B209108 --- U 5.00 ug/L B209108 --- U 5.00 ug/L B209108 U.S.E.P.A Region 2 Laboratory NOTE: The results recorded in this report relate only to the samples as received on the date and at the time noted Reported: 10/3/2022 Page 9 of 41 UNITED STATES ENVIRONMENTAL PROTECTION AGENCY Region 2 Laboratory Final Report Project: PREPA South Coast Power Plant - 2209015 Project Number: 2209015 Analyte Field ID: TRIP BLANK VOA GCMS Chlorobenzene Ethylbenzene Bromoform 1,1,2,2-Tetrachloroethane 1,3-Dichlorobenzene 1,4-Dichlorobenzene 1,2-Dichlorobenzene Field ID: Outfall 001c - Grab GC - Sanitary Oil & Grease Field ID: Outfall 001c - Comp. Sanitary Total Suspended Solids Result Qualifier Reporting Limit Units Batch Sample ID: 2209015-03 Date and Time of Analysis* --- U 5.00 ug/L B209108 --- U 5.00 ug/L B209108 --- U 5.00 ug/L B209108 --- U 5.00 ug/L B209108 --- U 5.00 ug/L B209108 --- U 5.00 ug/L B209108 --- U 5.00 ug/L B209108 Sample ID: 2209015-04 --- U 6.30 mg/L B209121 Sample ID: 2209015-05 --- U 10.0 mg/L B209115 U.S.E.P.A Region 2 Laboratory NOTE: The results recorded in this report relate only to the samples as received on the date and at the time noted Reported: 10/3/2022 Page 10 of 41 UNITED STATES ENVIRONMENTAL PROTECTION AGENCY Region 2 Laboratory Final Report Project: PREPA South Coast Power Plant - 2209015 Project Number: 2209015 VOA GCMS - Quality Control Analyte Batch B209108 Blank (B209108-BLK1) Chloromethane Vinyl Chloride Bromomethane Chloroethane Trichlorofluoromethane 1,1-Dichloroethene Methylene Chloride Acrylonitrile trans-1,2-Dichloroethene 1,1-Dichloroethane Chloroform 1,1,1-Trichloroethane Carbon Tetrachloride 1,2-Dichloroethane Benzene Trichloroethene 1,2-Dichloropropane Bromodichloromethane cis-1,3-Dichloropropene Toluene trans-1,3-Dichloropropene 1,1,2-Trichloroethane Tetrachloroethene Dibromochloromethane Chlorobenzene Ethylbenzene Bromoform 1,1,2,2-Tetrachloroethane 1,3-Dichlorobenzene 1,4-Dichlorobenzene 1,2-Dichlorobenzene Surrogate: 1,4-Difluorobenzene Surrogate: 2-Bromo-1-Chloropropane Surrogate: 1,4-Dichlorobutane Result Reporting Limit Units Spike Source %REC Level Result %REC Limits RPD RPD Limit --- U 5.00 ug/L --- U 5.00 ug/L --- U 5.00 ug/L --- U 5.00 ug/L --- U 5.00 ug/L --- U 5.00 ug/L --- U 5.00 ug/L --- U 5.00 ug/L --- U 5.00 ug/L --- U 5.00 ug/L --- U 5.00 ug/L --- U 5.00 ug/L --- U 5.00 ug/L --- U 5.00 ug/L --- U 5.00 ug/L --- U 5.00 ug/L --- U 5.00 ug/L --- U 5.00 ug/L --- U 5.00 ug/L --- U 5.00 ug/L --- U 5.00 ug/L --- U 5.00 ug/L --- U 5.00 ug/L --- U 5.00 ug/L --- U 5.00 ug/L --- U 5.00 ug/L --- U 5.00 ug/L --- U 5.00 ug/L --- U 5.00 ug/L --- U 5.00 ug/L --- U 5.00 ug/L ND ug/L 100.0 102 ug/L 100.0 ND ug/L 100.0 98.4 60-140 102 60-140 98.4 60-140 U.S.E.P.A Region 2 Laboratory NOTE: The results recorded in this report relate only to the samples as received on the date and at the time noted Reported: 10/3/2022 Page 11 of 41 UNITED STATES ENVIRONMENTAL PROTECTION AGENCY Region 2 Laboratory Final Report Project: PREPA South Coast Power Plant - 2209015 Project Number: 2209015 VOA GCMS - Quality Control Analyte Batch B209108 LCS (B209108-BS1) Chloromethane Vinyl Chloride Bromomethane Chloroethane Trichlorofluoromethane 1,1-Dichloroethene Methylene Chloride Acrylonitrile trans-1,2-Dichloroethene 1,1-Dichloroethane Chloroform 1,1,1-Trichloroethane Carbon Tetrachloride 1,2-Dichloroethane Benzene Trichloroethene 1,2-Dichloropropane Bromodichloromethane cis-1,3-Dichloropropene Toluene trans-1,3-Dichloropropene 1,1,2-Trichloroethane Tetrachloroethene Dibromochloromethane Chlorobenzene Ethylbenzene Bromoform 1,1,2,2-Tetrachloroethane 1,3-Dichlorobenzene 1,4-Dichlorobenzene 1,2-Dichlorobenzene Surrogate: 1,4-Difluorobenzene Surrogate: 2-Bromo-1-Chloropropane Surrogate: 1,4-Dichlorobutane Result Reporting Limit Units Spike Source %REC Level Result %REC Limits RPD RPD Limit 44.5 ug/L 50.00 89.1 19-205 38.7 ug/L 50.00 77.5 5-195 54.4 ug/L 50.00 109 15-185 43.6 ug/L 50.00 87.3 40-160 42.6 ug/L 50.00 85.2 50-150 50.8 ug/L 50.00 102 50-150 47.4 ug/L 50.00 94.7 60-140 44.0 ug/L 50.00 87.9 60-140 49.3 ug/L 50.00 98.6 70-130 46.3 ug/L 50.00 92.5 70-130 45.2 ug/L 50.00 90.3 70-135 44.2 ug/L 50.00 88.4 70-130 43.6 ug/L 50.00 87.2 70-130 43.8 ug/L 50.00 87.7 70-130 45.1 ug/L 50.00 90.3 65-135 44.1 ug/L 50.00 88.2 65-135 43.8 ug/L 50.00 87.5 35-165 42.5 ug/L 50.00 84.9 65-135 44.4 ug/L 50.00 88.9 25-175 42.8 ug/L 50.00 85.5 70-130 46.7 ug/L 50.00 93.4 50-150 42.0 ug/L 50.00 84.1 70-130 42.1 ug/L 50.00 84.2 70-130 43.5 ug/L 50.00 87.0 70-135 43.6 ug/L 50.00 87.2 65-135 43.7 ug/L 50.00 87.4 60-140 41.2 ug/L 50.00 82.4 70-130 41.8 ug/L 50.00 83.6 60-140 44.4 ug/L 50.00 88.8 70-130 42.4 ug/L 50.00 84.8 65-135 43.7 ug/L 50.00 87.5 65-135 100 ug/L 100.0 100 60-140 101 ug/L 100.0 101 60-140 98.8 ug/L 100.0 98.8 60-140 U.S.E.P.A Region 2 Laboratory NOTE: The results recorded in this report relate only to the samples as received on the date and at the time noted Reported: 10/3/2022 Page 12 of 41 UNITED STATES ENVIRONMENTAL PROTECTION AGENCY Region 2 Laboratory Final Report Project: PREPA South Coast Power Plant - 2209015 Project Number: 2209015 VOA GCMS - Quality Control Analyte Batch B209108 LCS Dup (B209108-BSD1) Chloromethane Vinyl Chloride Bromomethane Chloroethane Trichlorofluoromethane 1,1-Dichloroethene Methylene Chloride Acrylonitrile trans-1,2-Dichloroethene 1,1-Dichloroethane Chloroform 1,1,1-Trichloroethane Carbon Tetrachloride 1,2-Dichloroethane Benzene Trichloroethene 1,2-Dichloropropane Bromodichloromethane cis-1,3-Dichloropropene Toluene trans-1,3-Dichloropropene 1,1,2-Trichloroethane Tetrachloroethene Dibromochloromethane Chlorobenzene Ethylbenzene Bromoform 1,1,2,2-Tetrachloroethane 1,3-Dichlorobenzene 1,4-Dichlorobenzene 1,2-Dichlorobenzene Surrogate: 1,4-Difluorobenzene Surrogate: 2-Bromo-1-Chloropropane Surrogate: 1,4-Dichlorobutane Result Reporting Limit Units Spike Source %REC Level Result %REC Limits RPD RPD Limit 51.5 ug/L 50.00 103 19-205 14.5 20 45.5 ug/L 50.00 91.0 5-195 16.1 20 60.8 ug/L 50.00 122 15-185 11.1 20 49.2 ug/L 50.00 98.4 40-160 12.0 20 48.6 ug/L 50.00 97.2 50-150 13.2 20 56.2 ug/L 50.00 112 50-150 10.2 20 53.3 ug/L 50.00 107 60-140 11.8 20 52.1 ug/L 50.00 104 60-140 17.0 20 56.5 ug/L 50.00 113 70-130 13.7 20 52.3 ug/L 50.00 105 70-130 12.2 20 51.1 ug/L 50.00 102 70-135 12.3 20 52.0 ug/L 50.00 104 70-130 16.2 20 50.3 ug/L 50.00 101 70-130 14.2 20 50.4 ug/L 50.00 101 70-130 13.9 20 50.0 ug/L 50.00 100 65-135 10.3 20 48.5 ug/L 50.00 97.1 65-135 9.61 20 49.4 ug/L 50.00 98.7 35-165 12.0 20 47.6 ug/L 50.00 95.2 65-135 11.4 20 49.4 ug/L 50.00 98.7 25-175 10.5 20 49.1 ug/L 50.00 98.2 70-130 13.8 20 52.2 ug/L 50.00 104 50-150 11.0 20 47.1 ug/L 50.00 94.1 70-130 11.3 20 47.0 ug/L 50.00 93.9 70-130 11.0 20 50.4 ug/L 50.00 101 70-135 14.6 20 49.4 ug/L 50.00 98.8 65-135 12.4 20 49.4 ug/L 50.00 98.8 60-140 12.2 20 47.9 ug/L 50.00 95.7 70-130 15.0 20 48.2 ug/L 50.00 96.3 60-140 14.2 20 49.7 ug/L 50.00 99.3 70-130 11.2 20 48.9 ug/L 50.00 97.8 65-135 14.3 20 49.0 ug/L 50.00 98.0 65-135 11.4 20 98.2 ug/L 100.0 98.2 60-140 101 ug/L 100.0 101 60-140 100 ug/L 100.0 100 60-140 U.S.E.P.A Region 2 Laboratory NOTE: The results recorded in this report relate only to the samples as received on the date and at the time noted Reported: 10/3/2022 Page 13 of 41 UNITED STATES ENVIRONMENTAL PROTECTION AGENCY Region 2 Laboratory Final Report Project: PREPA South Coast Power Plant - 2209015 Project Number: 2209015 VOA GCMS - Quality Control Analyte Batch B209108 Matrix Spike (B209108-MS1) Chloromethane Vinyl Chloride Bromomethane Chloroethane Trichlorofluoromethane 1,1-Dichloroethene Methylene Chloride Acrylonitrile trans-1,2-Dichloroethene 1,1-Dichloroethane Chloroform 1,1,1-Trichloroethane Carbon Tetrachloride 1,2-Dichloroethane Benzene Trichloroethene 1,2-Dichloropropane Bromodichloromethane cis-1,3-Dichloropropene Toluene trans-1,3-Dichloropropene 1,1,2-Trichloroethane Tetrachloroethene Dibromochloromethane Chlorobenzene Ethylbenzene Bromoform 1,1,2,2-Tetrachloroethane 1,3-Dichlorobenzene 1,4-Dichlorobenzene 1,2-Dichlorobenzene Surrogate: 1,4-Difluorobenzene Surrogate: 2-Bromo-1-Chloropropane Surrogate: 1,4-Dichlorobutane Result Reporting Limit Units Spike Source %REC Level Result %REC Limits RPD RPD Limit Source: 2209015-02 47.1 5.00 ug/L 41.3 5.00 ug/L 48.3 5.00 ug/L 49.8 5.00 ug/L 47.2 5.00 ug/L 49.4 5.00 ug/L 47.2 5.00 ug/L 45.6 5.00 ug/L 48.8 5.00 ug/L 47.1 5.00 ug/L 46.1 5.00 ug/L 45.6 5.00 ug/L 44.6 5.00 ug/L 44.6 5.00 ug/L 44.2 5.00 ug/L 43.8 5.00 ug/L 42.4 5.00 ug/L 40.8 5.00 ug/L 43.1 5.00 ug/L 44.2 5.00 ug/L 43.3 5.00 ug/L 41.9 5.00 ug/L 44.4 5.00 ug/L 42.0 5.00 ug/L 43.3 5.00 ug/L 43.8 5.00 ug/L 40.8 5.00 ug/L 41.8 5.00 ug/L 43.0 5.00 ug/L 42.8 5.00 ug/L 42.4 5.00 ug/L 98.3 ug/L 103 ug/L 98.2 ug/L 50.00 ND 50.00 ND 50.00 ND 50.00 ND 50.00 ND 50.00 ND 50.00 ND 50.00 ND 50.00 ND 50.00 ND 50.00 ND 50.00 ND 50.00 ND 50.00 ND 50.00 ND 50.00 ND 50.00 ND 50.00 ND 50.00 ND 50.00 ND 50.00 ND 50.00 ND 50.00 ND 50.00 ND 50.00 ND 50.00 ND 50.00 ND 50.00 ND 50.00 ND 50.00 ND 50.00 ND 100.0 100.0 100.0 94.3 19-273 82.6 49-251 96.6 21-242 99.7 14-230 94.5 17-181 98.9 52-234 94.4 69-221 91.2 40-160 97.7 54-156 94.1 59-155 92.2 51-138 91.2 52-162 89.2 70-140 89.2 49-155 88.3 37-151 87.6 70-157 84.8 74-210 81.7 35-155 86.2 80-227 88.5 47-150 86.6 17-183 83.8 52-150 88.8 64-148 83.9 53-149 86.6 37-160 87.5 37-162 81.6 45-169 83.5 46-157 86.1 59-156 85.5 18-190 84.9 18-190 98.3 60-140 103 60-140 98.2 60-140 U.S.E.P.A Region 2 Laboratory NOTE: The results recorded in this report relate only to the samples as received on the date and at the time noted Reported: 10/3/2022 Page 14 of 41 UNITED STATES ENVIRONMENTAL PROTECTION AGENCY Region 2 Laboratory Final Report Project: PREPA South Coast Power Plant - 2209015 Project Number: 2209015 VOA GCMS - Quality Control Analyte Batch B209108 Matrix Spike Dup (B209108-MSD1) Chloromethane Vinyl Chloride Bromomethane Chloroethane Trichlorofluoromethane 1,1-Dichloroethene Methylene Chloride Acrylonitrile trans-1,2-Dichloroethene 1,1-Dichloroethane Chloroform 1,1,1-Trichloroethane Carbon Tetrachloride 1,2-Dichloroethane Benzene Trichloroethene 1,2-Dichloropropane Bromodichloromethane cis-1,3-Dichloropropene Toluene trans-1,3-Dichloropropene 1,1,2-Trichloroethane Tetrachloroethene Dibromochloromethane Chlorobenzene Ethylbenzene Bromoform 1,1,2,2-Tetrachloroethane 1,3-Dichlorobenzene 1,4-Dichlorobenzene 1,2-Dichlorobenzene Surrogate: 1,4-Difluorobenzene Surrogate: 2-Bromo-1-Chloropropane Surrogate: 1,4-Dichlorobutane Result Reporting Limit Units Spike Source %REC Level Result %REC Limits RPD RPD Limit Source: 2209015-02 49.4 5.00 ug/L 50.00 ND 98.9 19-273 4.76 28 44.3 5.00 ug/L 50.00 ND 88.6 49-251 7.01 28 50.6 5.00 ug/L 50.00 ND 101 21-242 4.63 28 52.6 5.00 ug/L 50.00 ND 105 14-230 5.27 28 50.1 5.00 ug/L 50.00 ND 100 17-181 5.91 28 53.8 5.00 ug/L 50.00 ND 108 52-234 8.33 28 50.6 5.00 ug/L 50.00 ND 101 69-221 6.90 28 50.7 5.00 ug/L 50.00 ND 101 40-160 10.6 28 51.1 5.00 ug/L 50.00 ND 102 54-156 4.46 28 49.0 5.00 ug/L 50.00 ND 98.1 59-155 4.08 28 48.9 5.00 ug/L 50.00 ND 97.8 51-138 5.85 28 49.1 5.00 ug/L 50.00 ND 98.1 52-162 7.33 28 48.7 5.00 ug/L 50.00 ND 97.4 70-140 8.79 28 48.0 5.00 ug/L 50.00 ND 96.0 49-155 7.37 28 46.7 5.00 ug/L 50.00 ND 93.4 37-151 5.53 28 47.4 5.00 ug/L 50.00 ND 94.8 70-157 7.87 28 46.5 5.00 ug/L 50.00 ND 93.0 74-210 9.25 28 43.8 5.00 ug/L 50.00 ND 87.5 35-155 6.90 28 42.2 5.00 ug/L 50.00 ND 84.4 80-227 2.13 28 47.6 5.00 ug/L 50.00 ND 95.1 47-150 7.23 28 45.0 5.00 ug/L 50.00 ND 89.9 17-183 3.69 28 45.5 5.00 ug/L 50.00 ND 91.1 52-150 8.26 28 47.3 5.00 ug/L 50.00 ND 94.7 64-148 6.45 28 45.4 5.00 ug/L 50.00 ND 90.8 53-149 7.88 28 48.7 5.00 ug/L 50.00 ND 97.4 37-160 11.7 28 48.3 5.00 ug/L 50.00 ND 96.5 37-162 9.78 28 45.2 5.00 ug/L 50.00 ND 90.3 45-169 10.1 28 45.8 5.00 ug/L 50.00 ND 91.7 46-157 9.34 28 47.6 5.00 ug/L 50.00 ND 95.1 59-156 9.96 28 46.6 5.00 ug/L 50.00 ND 93.2 18-190 8.55 28 46.3 5.00 ug/L 50.00 ND 92.6 18-190 8.72 28 95.9 ug/L 100.0 95.9 60-140 102 ug/L 100.0 102 60-140 101 ug/L 100.0 101 60-140 U.S.E.P.A Region 2 Laboratory NOTE: The results recorded in this report relate only to the samples as received on the date and at the time noted Reported: 10/3/2022 Page 15 of 41 UNITED STATES ENVIRONMENTAL PROTECTION AGENCY Region 2 Laboratory Final Report Project: PREPA South Coast Power Plant - 2209015 Project Number: 2209015 NVOA GCMS - Quality Control Analyte Result Reporting Limit Units Spike Source %REC Level Result %REC Limits RPD Batch B209096 Blank (B209096-BLK1) Acenaphthene Acenaphthylene Anthracene Benzo(A)Anthracene Benzo(A)Pyrene Benzo(B)Fluoranthene Benzo(G,H,I)Perylene Benzo(K)Fluoranthene Chrysene Dibenzo(A,H)Anthracene Fluoranthene Fluorene Indeno(1,2,3-Cd)Pyrene Naphthalene Phenanthrene 1,2,4-Trichlorobenzene 2,4,6-Trichlorophenol 2,4-Dichlorophenol 2,4-Dimethylphenol 2,4-Dinitrotoluene 2,6-Dinitrotoluene 2,4-Dinitrophenol 2-Chloronaphthalene 2-Chlorophenol 2-Nitrophenol 3,3'- Dichlorobenzidine 4,6-Dinitro-2-Methylphenol 4-Bromophenyl-Phenylether 4-Chloro-3-Methylphenol 4-Chlorophenyl-Phenylether 4-Nitrophenol Bis(-2-Chloroethoxy)Methane Bis(2-Chloroethyl)Ether Bis(2-Chloroisopropyl)Ether Bis(2-Ethylhexyl)Phthalate --- U 5.00 ug/L --- U 5.00 ug/L --- U 5.00 ug/L --- U 5.00 ug/L --- U 5.00 ug/L --- U 5.00 ug/L --- U 5.00 ug/L --- U 5.00 ug/L --- U 5.00 ug/L --- U 5.00 ug/L --- U 5.00 ug/L --- U 5.00 ug/L --- U 5.00 ug/L --- U 5.00 ug/L --- U 5.00 ug/L --- U 5.00 ug/L --- U 5.00 ug/L --- U 5.00 ug/L --- U 5.00 ug/L --- U 5.00 ug/L --- U 5.00 ug/L --- U 5.00 ug/L --- U 5.00 ug/L --- U 5.00 ug/L --- U 5.00 ug/L --- U 5.00 ug/L --- U 5.00 ug/L --- U 5.00 ug/L --- U 5.00 ug/L --- U 5.00 ug/L --- U 5.00 ug/L --- U 5.00 ug/L --- U 5.00 ug/L --- U 5.00 ug/L --- U 5.00 ug/L U.S.E.P.A Region 2 Laboratory NOTE: The results recorded in this report relate only to the samples as received on the date and at the time noted Reported: 10/3/2022 RPD Limit Page 16 of 41 UNITED STATES ENVIRONMENTAL PROTECTION AGENCY Region 2 Laboratory Final Report Project: PREPA South Coast Power Plant - 2209015 Project Number: 2209015 NVOA GCMS - Quality Control Analyte Batch B209096 Blank (B209096-BLK1) Butylbenzylphthalate Azobenzene Diethylphthalate Dimethyl Phthalate Di-N-Butyl Phthalate Di-N-Octyl Phthalate Hexachlorobenzene Hexachlorobutadiene Hexachlorocyclopentadiene Hexachloroethane Isophorone Nitrobenzene N-Nitrosodimethylamine N-Nitroso-Di-N-Propylamine N-Nitrosodiphenylamine Pentachlorophenol Phenol Pyrene Surrogate: 2-Fluoroaniline Surrogate: Phenol-D6 Surrogate: Naphthalene-D8 Surrogate: 1-Fluoronaphthalene Surrogate: 2,4-Dibromophenol Surrogate: Anthracene-D10 Surrogate: Chrysene-D12 LCS (B209096-BS1) Acenaphthene Acenaphthylene Anthracene Benzo(A)Anthracene Benzo(A)Pyrene Benzo(B)Fluoranthene Benzo(G,H,I)Perylene Benzo(K)Fluoranthene Result Reporting Limit Units Spike Source %REC Level Result %REC Limits RPD RPD Limit --- U 5.00 ug/L --- U 5.00 ug/L --- U 5.00 ug/L --- U 5.00 ug/L --- U 5.00 ug/L --- U 5.00 ug/L --- U 5.00 ug/L --- U 5.00 ug/L --- U 5.00 ug/L --- U 5.00 ug/L --- U 5.00 ug/L --- U 5.00 ug/L --- U 5.00 ug/L --- U 5.00 ug/L --- U 5.00 ug/L --- U 5.00 ug/L --- U 5.00 ug/L --- U 5.00 ug/L 41.6 ug/L 50.00 ND ug/L 50.00 37.7 ug/L 50.00 37.0 ug/L 50.00 37.6 ug/L 50.00 61.9 ug/L 50.00 44.4 ug/L 50.00 37.7 5.00 ug/L 50.00 37.4 5.00 ug/L 50.00 43.9 5.00 ug/L 50.00 38.8 5.00 ug/L 50.00 48.2 5.00 ug/L 50.00 51.2 5.00 ug/L 50.00 47.8 5.00 ug/L 50.00 48.0 5.00 ug/L 50.00 83.2 60-140 34.9 60-140 75.4 60-140 74.1 60-140 75.2 60-140 124 60-140 88.7 60-140 75.5 47-145 74.9 33-145 87.9 27-133 77.5 33-143 96.4 17-163 102 24-159 95.5 35-219 95.9 11-162 U.S.E.P.A Region 2 Laboratory NOTE: The results recorded in this report relate only to the samples as received on the date and at the time noted Reported: 10/3/2022 Page 17 of 41 UNITED STATES ENVIRONMENTAL PROTECTION AGENCY Region 2 Laboratory Final Report Project: PREPA South Coast Power Plant - 2209015 Project Number: 2209015 NVOA GCMS - Quality Control Analyte Result Reporting Limit Units Spike Source %REC Level Result %REC Limits RPD Batch B209096 LCS (B209096-BS1) Chrysene Dibenzo(A,H)Anthracene Fluoranthene Fluorene Indeno(1,2,3-Cd)Pyrene Naphthalene Phenanthrene 1,2,4-Trichlorobenzene 2,4,6-Trichlorophenol 2,4-Dichlorophenol 2,4-Dimethylphenol 2,4-Dinitrotoluene 2,6-Dinitrotoluene 2,4-Dinitrophenol 2-Chloronaphthalene 2-Chlorophenol 2-Nitrophenol 3,3'- Dichlorobenzidine 4,6-Dinitro-2-Methylphenol 4-Bromophenyl-Phenylether 4-Chloro-3-Methylphenol 4-Chlorophenyl-Phenylether 4-Nitrophenol Bis(-2-Chloroethoxy)Methane Bis(2-Chloroethyl)Ether Bis(2-Chloroisopropyl)Ether Bis(2-Ethylhexyl)Phthalate Butylbenzylphthalate Azobenzene Diethylphthalate Dimethyl Phthalate Di-N-Butyl Phthalate Di-N-Octyl Phthalate Hexachlorobenzene Hexachlorobutadiene 39.2 5.00 ug/L 50.00 49.0 5.00 ug/L 50.00 48.0 5.00 ug/L 50.00 42.3 5.00 ug/L 50.00 52.2 5.00 ug/L 50.00 35.9 5.00 ug/L 50.00 44.1 5.00 ug/L 50.00 32.3 5.00 ug/L 50.00 41.1 5.00 ug/L 50.00 41.7 5.00 ug/L 50.00 44.7 5.00 ug/L 50.00 48.0 5.00 ug/L 50.00 42.7 5.00 ug/L 50.00 46.5 5.00 ug/L 50.00 35.4 5.00 ug/L 50.00 42.4 5.00 ug/L 50.00 43.8 5.00 ug/L 50.00 48.3 5.00 ug/L 50.00 57.6 5.00 ug/L 50.00 42.8 5.00 ug/L 50.00 40.8 5.00 ug/L 50.00 41.3 5.00 ug/L 50.00 21.4 5.00 ug/L 50.00 39.0 5.00 ug/L 50.00 41.9 5.00 ug/L 50.00 36.0 5.00 ug/L 50.00 46.1 5.00 ug/L 50.00 41.2 5.00 ug/L 50.00 42.0 5.00 ug/L 50.00 27.8 5.00 ug/L 50.00 9.04 5.00 ug/L 50.00 41.1 5.00 ug/L 50.00 49.4 5.00 ug/L 50.00 43.2 5.00 ug/L 50.00 29.5 5.00 ug/L 50.00 78.4 17-168 98.0 33-227 96.0 26-137 84.6 59-121 104 39-171 71.8 21-133 88.2 54-120 64.7 44-142 82.3 37-144 83.4 39-135 89.4 32-120 95.9 39-139 85.4 50-158 93.0 21-191 70.7 60-120 84.8 23-134 87.6 29-182 96.5 38-262 115 17-181 85.6 53-127 81.7 22-147 82.6 25-158 42.8 9-132 77.9 33-184 83.8 12-158 72.1 36-166 92.2 8-158 82.3 38-152 84.0 60-115 55.5 31-114 18.1 28-120 82.1 1-120 98.8 4-146 86.4 35-152 58.9 24-120 U.S.E.P.A Region 2 Laboratory NOTE: The results recorded in this report relate only to the samples as received on the date and at the time noted Reported: 10/3/2022 RPD Limit Page 18 of 41 UNITED STATES ENVIRONMENTAL PROTECTION AGENCY Region 2 Laboratory Final Report Project: PREPA South Coast Power Plant - 2209015 Project Number: 2209015 NVOA GCMS - Quality Control Analyte Batch B209096 LCS (B209096-BS1) Hexachlorocyclopentadiene Hexachloroethane Isophorone Nitrobenzene N-Nitrosodimethylamine N-Nitroso-Di-N-Propylamine N-Nitrosodiphenylamine Pentachlorophenol Phenol Pyrene Surrogate: 2-Fluoroaniline Surrogate: Phenol-D6 Surrogate: Naphthalene-D8 Surrogate: 1-Fluoronaphthalene Surrogate: 2,4-Dibromophenol Surrogate: Anthracene-D10 Surrogate: Chrysene-D12 LCS Dup (B209096-BSD1) Acenaphthene Acenaphthylene Anthracene Benzo(A)Anthracene Benzo(A)Pyrene Benzo(B)Fluoranthene Benzo(G,H,I)Perylene Benzo(K)Fluoranthene Chrysene Dibenzo(A,H)Anthracene Fluoranthene Fluorene Indeno(1,2,3-Cd)Pyrene Naphthalene Phenanthrene 1,2,4-Trichlorobenzene Result Reporting Limit Units Spike Source %REC Level Result %REC Limits RPD RPD Limit 29.0 5.00 ug/L 50.00 30.8 5.00 ug/L 50.00 42.0 5.00 ug/L 50.00 42.7 5.00 ug/L 50.00 28.9 5.00 ug/L 50.00 39.2 5.00 ug/L 50.00 49.1 5.00 ug/L 50.00 45.1 5.00 ug/L 50.00 19.2 5.00 ug/L 50.00 49.1 5.00 ug/L 50.00 43.6 ug/L 50.00 17.9 ug/L 50.00 34.3 ug/L 50.00 31.5 ug/L 50.00 38.6 ug/L 50.00 56.4 ug/L 50.00 36.3 ug/L 50.00 40.3 5.00 ug/L 50.00 39.6 5.00 ug/L 50.00 47.4 5.00 ug/L 50.00 42.7 5.00 ug/L 50.00 53.0 5.00 ug/L 50.00 56.1 5.00 ug/L 50.00 53.6 5.00 ug/L 50.00 53.3 5.00 ug/L 50.00 42.8 5.00 ug/L 50.00 54.9 5.00 ug/L 50.00 53.1 5.00 ug/L 50.00 44.4 5.00 ug/L 50.00 57.9 5.00 ug/L 50.00 36.9 5.00 ug/L 50.00 48.4 5.00 ug/L 50.00 33.3 5.00 ug/L 50.00 58.0 15-76 61.6 40-120 84.0 21-196 85.4 35-180 57.7 17-127 78.4 43-230 98.2 79-139 90.3 14-176 38.4 5-120 98.1 52-120 87.2 60-140 35.8 60-140 68.7 60-140 62.9 60-140 77.2 60-140 113 60-140 72.6 60-140 80.5 47-145 6.46 30 79.2 33-145 5.68 30 94.9 27-133 7.66 30 85.3 33-143 9.58 30 106 17-163 9.53 30 112 24-159 9.06 30 107 35-219 11.6 30 107 11-162 10.5 30 85.7 17-168 8.80 30 110 33-227 11.4 30 106 26-137 10.0 30 88.8 59-121 4.94 30 116 39-171 10.3 30 73.8 21-133 2.77 30 96.8 54-120 9.30 30 66.6 44-142 2.90 30 U.S.E.P.A Region 2 Laboratory NOTE: The results recorded in this report relate only to the samples as received on the date and at the time noted Reported: 10/3/2022 Page 19 of 41 UNITED STATES ENVIRONMENTAL PROTECTION AGENCY Region 2 Laboratory Final Report Project: PREPA South Coast Power Plant - 2209015 Project Number: 2209015 NVOA GCMS - Quality Control Analyte Result Reporting Limit Units Spike Level Source Result %REC %REC Limits Batch B209096 LCS Dup (B209096-BSD1) 2,4,6-Trichlorophenol 2,4-Dichlorophenol 2,4-Dimethylphenol 2,4-Dinitrotoluene 2,6-Dinitrotoluene 2,4-Dinitrophenol 2-Chloronaphthalene 2-Chlorophenol 2-Nitrophenol 3,3'- Dichlorobenzidine 4,6-Dinitro-2-Methylphenol 4-Bromophenyl-Phenylether 4-Chloro-3-Methylphenol 4-Chlorophenyl-Phenylether 4-Nitrophenol Bis(-2-Chloroethoxy)Methane Bis(2-Chloroethyl)Ether Bis(2-Chloroisopropyl)Ether Bis(2-Ethylhexyl)Phthalate Butylbenzylphthalate Azobenzene Diethylphthalate Dimethyl Phthalate Di-N-Butyl Phthalate Di-N-Octyl Phthalate Hexachlorobenzene Hexachlorobutadiene Hexachlorocyclopentadiene Hexachloroethane Isophorone Nitrobenzene N-Nitrosodimethylamine N-Nitroso-Di-N-Propylamine N-Nitrosodiphenylamine Pentachlorophenol 43.8 5.00 ug/L 50.00 43.1 5.00 ug/L 50.00 40.9 5.00 ug/L 50.00 53.6 5.00 ug/L 50.00 47.4 5.00 ug/L 50.00 53.3 5.00 ug/L 50.00 37.3 5.00 ug/L 50.00 42.1 5.00 ug/L 50.00 44.8 5.00 ug/L 50.00 52.0 5.00 ug/L 50.00 65.9 5.00 ug/L 50.00 46.5 5.00 ug/L 50.00 43.4 5.00 ug/L 50.00 44.3 5.00 ug/L 50.00 23.9 5.00 ug/L 50.00 39.8 5.00 ug/L 50.00 41.6 5.00 ug/L 50.00 35.2 5.00 ug/L 50.00 51.6 5.00 ug/L 50.00 49.4 5.00 ug/L 50.00 44.5 5.00 ug/L 50.00 30.6 5.00 ug/L 50.00 10.8 5.00 ug/L 50.00 46.1 5.00 ug/L 50.00 55.2 5.00 ug/L 50.00 47.9 5.00 ug/L 50.00 29.8 5.00 ug/L 50.00 30.3 5.00 ug/L 50.00 31.4 5.00 ug/L 50.00 44.1 5.00 ug/L 50.00 43.7 5.00 ug/L 50.00 28.1 5.00 ug/L 50.00 40.4 5.00 ug/L 50.00 52.6 5.00 ug/L 50.00 51.4 5.00 ug/L 50.00 87.5 37-144 86.3 39-135 81.7 32-120 107 39-139 94.8 50-158 107 21-191 74.7 60-120 84.2 23-134 89.5 29-182 104 38-262 132 17-181 93.1 53-127 86.9 22-147 88.6 25-158 47.8 9-132 79.7 33-184 83.1 12-158 70.4 36-166 103 8-158 98.8 38-152 89.0 60-115 61.2 31-114 21.6 28-120 92.2 1-120 110 4-146 95.7 35-152 59.7 24-120 60.6 15-76 62.7 40-120 88.2 21-196 87.4 35-180 56.3 17-127 80.8 43-230 105 79-139 103 14-176 U.S.E.P.A Region 2 Laboratory NOTE: The results recorded in this report relate only to the samples as received on the date and at the time noted Reported: 10/3/2022 RPD 6.19 3.35 8.93 11.2 10.4 13.7 5.48 0.615 2.21 7.38 13.3 8.33 6.12 6.92 11.0 2.18 0.815 2.39 11.4 18.2 5.78 9.70 17.7 11.6 11.1 10.2 1.21 4.38 1.90 4.81 2.31 2.53 3.12 6.90 13.0 RPD Limit 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 Page 20 of 41 UNITED STATES ENVIRONMENTAL PROTECTION AGENCY Region 2 Laboratory Final Report Project: PREPA South Coast Power Plant - 2209015 Project Number: 2209015 NVOA GCMS - Quality Control Analyte Batch B209096 LCS Dup (B209096-BSD1) Phenol Pyrene Surrogate: 2-Fluoroaniline Surrogate: Phenol-D6 Surrogate: Naphthalene-D8 Surrogate: 1-Fluoronaphthalene Surrogate: 2,4-Dibromophenol Surrogate: Anthracene-D10 Surrogate: Chrysene-D12 Matrix Spike (B209096-MS1) Acenaphthene Acenaphthylene Anthracene Benzo(A)Anthracene Benzo(A)Pyrene Benzo(B)Fluoranthene Benzo(G,H,I)Perylene Benzo(K)Fluoranthene Chrysene Dibenzo(A,H)Anthracene Fluoranthene Fluorene Indeno(1,2,3-Cd)Pyrene Naphthalene Phenanthrene 1,2,4-Trichlorobenzene 2,4,6-Trichlorophenol 2,4-Dichlorophenol 2,4-Dimethylphenol 2,4-Dinitrotoluene 2,6-Dinitrotoluene 2,4-Dinitrophenol 2-Chloronaphthalene 2-Chlorophenol Result Reporting Limit Units Spike Source %REC Level Result %REC Limits RPD RPD Limit 19.1 5.00 ug/L 50.00 54.3 5.00 ug/L 50.00 43.2 ug/L 50.00 17.4 ug/L 50.00 35.4 ug/L 50.00 33.3 ug/L 50.00 40.7 ug/L 50.00 61.5 ug/L 50.00 39.1 ug/L 50.00 38.2 5-120 0.574 30 109 52-120 10.2 30 86.5 60-140 34.9 60-140 70.8 60-140 66.6 60-140 81.3 60-140 123 60-140 78.3 60-140 Source: 2209014-01 41.5 5.00 ug/L 42.8 5.00 ug/L 47.4 5.00 ug/L 40.7 5.00 ug/L 53.2 5.00 ug/L 52.7 5.00 ug/L 51.1 5.00 ug/L 50.0 5.00 ug/L 41.2 5.00 ug/L 53.7 5.00 ug/L 49.1 5.00 ug/L 50.8 5.00 ug/L 56.7 5.00 ug/L 39.2 5.00 ug/L 49.4 5.00 ug/L 38.4 5.00 ug/L 46.2 5.00 ug/L 44.2 5.00 ug/L 43.6 5.00 ug/L 55.9 5.00 ug/L 46.0 5.00 ug/L 58.5 5.00 ug/L 40.8 5.00 ug/L 38.8 5.00 ug/L 50.00 ND 50.00 ND 50.00 ND 50.00 ND 50.00 ND 50.00 ND 50.00 ND 50.00 ND 50.00 ND 50.00 ND 50.00 ND 50.00 ND 50.00 ND 50.00 ND 50.00 ND 50.00 ND 50.00 ND 50.00 ND 50.00 ND 50.00 ND 50.00 ND 50.00 ND 50.00 ND 50.00 ND 83.0 47-145 85.5 33-145 94.9 27-133 81.5 33-143 106 17-163 105 24-159 102 35-219 100 11-162 82.4 17-168 107 33-227 98.2 26-137 102 59-121 113 39-171 78.4 21-133 98.9 54-120 76.9 44-142 92.4 37-144 88.4 39-135 87.2 32-120 112 39-139 92.0 50-158 117 21-191 81.6 60-120 77.6 23-134 U.S.E.P.A Region 2 Laboratory NOTE: The results recorded in this report relate only to the samples as received on the date and at the time noted Reported: 10/3/2022 Page 21 of 41 UNITED STATES ENVIRONMENTAL PROTECTION AGENCY Region 2 Laboratory Final Report Project: PREPA South Coast Power Plant - 2209015 Project Number: 2209015 NVOA GCMS - Quality Control Analyte Result Reporting Limit Units Spike Source %REC Level Result %REC Limits RPD Batch B209096 Matrix Spike (B209096-MS1) 2-Nitrophenol 3,3'- Dichlorobenzidine 4,6-Dinitro-2-Methylphenol 4-Bromophenyl-Phenylether 4-Chloro-3-Methylphenol 4-Chlorophenyl-Phenylether 4-Nitrophenol Bis(-2-Chloroethoxy)Methane Bis(2-Chloroethyl)Ether Bis(2-Chloroisopropyl)Ether Bis(2-Ethylhexyl)Phthalate Butylbenzylphthalate Azobenzene Diethylphthalate Dimethyl Phthalate Di-N-Butyl Phthalate Di-N-Octyl Phthalate Hexachlorobenzene Hexachlorobutadiene Hexachlorocyclopentadiene Hexachloroethane Isophorone Nitrobenzene N-Nitrosodimethylamine N-Nitroso-Di-N-Propylamine N-Nitrosodiphenylamine Pentachlorophenol Phenol Pyrene Surrogate: 2-Fluoroaniline Surrogate: Phenol-D6 Surrogate: Naphthalene-D8 Surrogate: 1-Fluoronaphthalene Surrogate: 2,4-Dibromophenol Surrogate: Anthracene-D10 Source: 2209014-01 45.8 5.00 ug/L 42.3 5.00 ug/L 64.2 5.00 ug/L 52.7 5.00 ug/L 44.0 5.00 ug/L 52.5 5.00 ug/L 22.0 5.00 ug/L 41.8 5.00 ug/L 40.1 5.00 ug/L 38.8 5.00 ug/L 50.1 5.00 ug/L 49.5 5.00 ug/L 51.0 5.00 ug/L 40.4 5.00 ug/L 19.2 5.00 ug/L 48.3 5.00 ug/L 54.2 5.00 ug/L 52.4 5.00 ug/L 36.0 5.00 ug/L 28.6 5.00 ug/L 34.9 5.00 ug/L 41.5 5.00 ug/L 43.9 5.00 ug/L 21.4 5.00 ug/L 44.0 5.00 ug/L 48.4 5.00 ug/L 52.8 5.00 ug/L 18.7 5.00 ug/L 49.2 5.00 ug/L 40.8 ug/L 17.9 ug/L 40.1 ug/L 38.0 ug/L 44.1 ug/L 65.8 ug/L 50.00 ND 50.00 ND 50.00 ND 50.00 ND 50.00 ND 50.00 ND 50.00 ND 50.00 ND 50.00 ND 50.00 ND 50.00 ND 50.00 ND 50.00 ND 50.00 ND 50.00 ND 50.00 ND 50.00 ND 50.00 ND 50.00 ND 50.00 ND 50.00 ND 50.00 ND 50.00 ND 50.00 ND 50.00 ND 50.00 ND 50.00 ND 50.00 ND 50.00 ND 50.00 50.00 50.00 50.00 50.00 50.00 91.6 29-182 84.5 38-262 128 17-181 105 53-127 88.0 22-147 105 25-158 44.0 9-132 83.5 33-184 80.2 12-158 77.7 36-166 100 8-158 99.0 38-152 102 61-106 80.9 31-114 38.3 28-120 96.6 1-120 108 4-146 105 35-152 72.1 24-120 57.1 15-76 69.8 40-120 83.1 21-196 87.8 35-180 42.8 17-127 87.9 43-230 96.7 79-139 106 14-176 37.3 5-120 98.5 52-120 81.5 60-140 35.9 60-140 80.1 60-140 76.0 60-140 88.2 60-140 132 60-140 U.S.E.P.A Region 2 Laboratory NOTE: The results recorded in this report relate only to the samples as received on the date and at the time noted Reported: 10/3/2022 RPD Limit Page 22 of 41 UNITED STATES ENVIRONMENTAL PROTECTION AGENCY Region 2 Laboratory Final Report Project: PREPA South Coast Power Plant - 2209015 Project Number: 2209015 NVOA GCMS - Quality Control Analyte Batch B209096 Matrix Spike (B209096-MS1) Surrogate: Chrysene-D12 Matrix Spike (B209096-MS2) Acenaphthene Acenaphthylene Anthracene Benzo(A)Anthracene Benzo(A)Pyrene Benzo(B)Fluoranthene Benzo(G,H,I)Perylene Benzo(K)Fluoranthene Chrysene Dibenzo(A,H)Anthracene Fluoranthene Fluorene Indeno(1,2,3-Cd)Pyrene Naphthalene Phenanthrene 1,2,4-Trichlorobenzene 2,4,6-Trichlorophenol 2,4-Dichlorophenol 2,4-Dimethylphenol 2,4-Dinitrotoluene 2,6-Dinitrotoluene 2,4-Dinitrophenol 2-Chloronaphthalene 2-Chlorophenol 2-Nitrophenol 3,3'- Dichlorobenzidine 4,6-Dinitro-2-Methylphenol 4-Bromophenyl-Phenylether 4-Chloro-3-Methylphenol 4-Chlorophenyl-Phenylether 4-Nitrophenol Bis(-2-Chloroethoxy)Methane Result Reporting Limit Units Spike Source %REC Level Result %REC Limits RPD Source: 2209014-01 38.5 ug/L Source: 2209015-02 39.0 5.00 ug/L 39.4 5.00 ug/L 43.9 5.00 ug/L 40.0 5.00 ug/L 54.2 5.00 ug/L 52.0 5.00 ug/L 50.6 5.00 ug/L 49.8 5.00 ug/L 40.8 5.00 ug/L 52.9 5.00 ug/L 49.1 5.00 ug/L 43.6 5.00 ug/L 55.8 5.00 ug/L 37.8 5.00 ug/L 45.2 5.00 ug/L 39.8 5.00 ug/L 42.8 5.00 ug/L 42.5 5.00 ug/L 37.1 5.00 ug/L 49.2 5.00 ug/L 43.0 5.00 ug/L 66.1 5.00 ug/L 38.8 5.00 ug/L 39.0 5.00 ug/L 44.4 5.00 ug/L 44.4 5.00 ug/L 62.1 5.00 ug/L 45.1 5.00 ug/L 41.8 5.00 ug/L 44.8 5.00 ug/L 24.6 5.00 ug/L 38.0 5.00 ug/L 50.00 50.00 ND 50.00 ND 50.00 ND 50.00 ND 50.00 ND 50.00 ND 50.00 ND 50.00 ND 50.00 ND 50.00 ND 50.00 ND 50.00 ND 50.00 ND 50.00 ND 50.00 ND 50.00 ND 50.00 ND 50.00 ND 50.00 ND 50.00 ND 50.00 ND 50.00 ND 50.00 ND 50.00 ND 50.00 ND 50.00 ND 50.00 ND 50.00 ND 50.00 ND 50.00 ND 50.00 ND 50.00 ND 76.9 60-140 78.0 47-145 78.8 33-145 87.7 27-133 80.0 33-143 108 17-163 104 24-159 101 35-219 99.7 11-162 81.5 17-168 106 33-227 98.2 26-137 87.1 59-121 112 39-171 75.5 21-133 90.5 54-120 79.6 44-142 85.6 37-144 84.9 39-135 74.2 32-120 98.5 39-139 86.0 50-158 132 21-191 77.7 60-120 78.0 23-134 88.8 29-182 88.8 38-262 124 17-181 90.2 53-127 83.5 22-147 89.6 25-158 49.2 9-132 75.9 33-184 U.S.E.P.A Region 2 Laboratory NOTE: The results recorded in this report relate only to the samples as received on the date and at the time noted Reported: 10/3/2022 RPD Limit Page 23 of 41 Analyte Batch B209096 Matrix Spike (B209096-MS2) Bis(2-Chloroethyl)Ether Bis(2-Chloroisopropyl)Ether Bis(2-Ethylhexyl)Phthalate Butylbenzylphthalate Azobenzene Diethylphthalate Dimethyl Phthalate Di-N-Butyl Phthalate Di-N-Octyl Phthalate Hexachlorobenzene Hexachlorobutadiene Hexachlorocyclopentadiene Hexachloroethane Isophorone Nitrobenzene N-Nitrosodimethylamine N-Nitroso-Di-N-Propylamine N-Nitrosodiphenylamine Pentachlorophenol Phenol Pyrene Surrogate: 2-Fluoroaniline Surrogate: Phenol-D6 Surrogate: Naphthalene-D8 Surrogate: 1-Fluoronaphthalene Surrogate: 2,4-Dibromophenol Surrogate: Anthracene-D10 Surrogate: Chrysene-D12 UNITED STATES ENVIRONMENTAL PROTECTION AGENCY Region 2 Laboratory Final Report Project: PREPA South Coast Power Plant - 2209015 Project Number: 2209015 NVOA GCMS - Quality Control Result Reporting Limit Units Spike Source %REC Level Result %REC Limits RPD RPD Limit Source: 2209015-02 38.2 5.00 ug/L 36.4 5.00 ug/L 51.4 5.00 ug/L 66.1 5.00 ug/L 43.8 5.00 ug/L 43.9 5.00 ug/L 38.4 5.00 ug/L 49.2 5.00 ug/L 55.8 5.00 ug/L 45.0 5.00 ug/L 40.7 5.00 ug/L 40.4 5.00 ug/L 40.6 5.00 ug/L 38.1 5.00 ug/L 41.3 5.00 ug/L 24.6 5.00 ug/L 39.8 5.00 ug/L 42.5 5.00 ug/L 48.3 5.00 ug/L 18.8 5.00 ug/L 50.0 5.00 ug/L 37.6 ug/L 18.0 ug/L 38.9 ug/L 38.8 ug/L 41.3 ug/L 59.9 ug/L 38.2 ug/L 50.00 ND 50.00 ND 50.00 ND 50.00 ND 50.00 ND 50.00 ND 50.00 ND 50.00 ND 50.00 ND 50.00 ND 50.00 ND 50.00 ND 50.00 ND 50.00 ND 50.00 ND 50.00 ND 50.00 ND 50.00 ND 50.00 ND 50.00 ND 50.00 ND 50.00 50.00 50.00 50.00 50.00 50.00 50.00 76.4 12-158 72.9 36-166 103 8-158 132 38-152 87.7 61-106 87.8 31-114 76.9 28-120 98.3 1-120 112 4-146 90.0 35-152 81.3 24-120 80.9 15-76 81.3 40-120 76.1 21-196 82.5 35-180 49.2 17-127 79.7 43-230 85.1 79-139 96.6 14-176 37.7 5-120 99.9 52-120 75.3 60-140 35.9 60-140 77.7 60-140 77.5 60-140 82.6 60-140 120 60-140 76.5 60-140 U.S.E.P.A Region 2 Laboratory NOTE: The results recorded in this report relate only to the samples as received on the date and at the time noted Reported: 10/3/2022 Page 24 of 41 UNITED STATES ENVIRONMENTAL PROTECTION AGENCY Region 2 Laboratory Final Report Project: PREPA South Coast Power Plant - 2209015 Project Number: 2209015 NVOA GCMS - Quality Control Analyte Result Reporting Limit Units Spike Level Source Result %REC %REC Limits Batch B209096 Matrix Spike Dup (B209096-MSD1) Acenaphthene Acenaphthylene Anthracene Benzo(A)Anthracene Benzo(A)Pyrene Benzo(B)Fluoranthene Benzo(G,H,I)Perylene Benzo(K)Fluoranthene Chrysene Dibenzo(A,H)Anthracene Fluoranthene Fluorene Indeno(1,2,3-Cd)Pyrene Naphthalene Phenanthrene 1,2,4-Trichlorobenzene 2,4,6-Trichlorophenol 2,4-Dichlorophenol 2,4-Dimethylphenol 2,4-Dinitrotoluene 2,6-Dinitrotoluene 2,4-Dinitrophenol 2-Chloronaphthalene 2-Chlorophenol 2-Nitrophenol 3,3'- Dichlorobenzidine 4,6-Dinitro-2-Methylphenol 4-Bromophenyl-Phenylether 4-Chloro-3-Methylphenol 4-Chlorophenyl-Phenylether 4-Nitrophenol Bis(-2-Chloroethoxy)Methane Bis(2-Chloroethyl)Ether Bis(2-Chloroisopropyl)Ether Bis(2-Ethylhexyl)Phthalate Source: 2209014-01 37.8 5.00 ug/L 38.7 5.00 ug/L 44.0 5.00 ug/L 38.9 5.00 ug/L 51.8 5.00 ug/L 51.2 5.00 ug/L 50.0 5.00 ug/L 48.1 5.00 ug/L 39.4 5.00 ug/L 52.2 5.00 ug/L 48.8 5.00 ug/L 44.9 5.00 ug/L 55.1 5.00 ug/L 37.2 5.00 ug/L 45.6 5.00 ug/L 36.7 5.00 ug/L 41.8 5.00 ug/L 41.3 5.00 ug/L 41.6 5.00 ug/L 50.8 5.00 ug/L 42.0 5.00 ug/L 63.9 5.00 ug/L 37.1 5.00 ug/L 39.2 5.00 ug/L 43.6 5.00 ug/L 41.1 5.00 ug/L 60.7 5.00 ug/L 45.5 5.00 ug/L 40.4 5.00 ug/L 44.8 5.00 ug/L 23.0 5.00 ug/L 37.7 5.00 ug/L 39.0 5.00 ug/L 36.1 5.00 ug/L 48.0 5.00 ug/L 50.00 ND 50.00 ND 50.00 ND 50.00 ND 50.00 ND 50.00 ND 50.00 ND 50.00 ND 50.00 ND 50.00 ND 50.00 ND 50.00 ND 50.00 ND 50.00 ND 50.00 ND 50.00 ND 50.00 ND 50.00 ND 50.00 ND 50.00 ND 50.00 ND 50.00 ND 50.00 ND 50.00 ND 50.00 ND 50.00 ND 50.00 ND 50.00 ND 50.00 ND 50.00 ND 50.00 ND 50.00 ND 50.00 ND 50.00 ND 50.00 ND 75.5 47-145 77.3 33-145 88.1 27-133 77.9 33-143 104 17-163 102 24-159 100 35-219 96.2 11-162 78.9 17-168 104 33-227 97.6 26-137 89.8 59-121 110 39-171 74.4 21-133 91.2 54-120 73.4 44-142 83.6 37-144 82.6 39-135 83.3 32-120 102 39-139 84.0 50-158 128 21-191 74.2 60-120 78.5 23-134 87.2 29-182 82.2 38-262 121 17-181 91.1 53-127 80.7 22-147 89.7 25-158 46.1 9-132 75.4 33-184 78.0 12-158 72.2 36-166 96.0 8-158 U.S.E.P.A Region 2 Laboratory NOTE: The results recorded in this report relate only to the samples as received on the date and at the time noted Reported: 10/3/2022 RPD 9.46 10.0 7.41 4.52 2.66 2.85 2.00 3.81 4.37 2.83 0.695 12.4 2.79 5.23 8.12 4.71 10.0 6.71 4.67 9.73 9.16 8.81 9.55 1.18 4.95 2.86 5.59 14.7 8.68 15.8 4.66 10.2 2.73 7.34 4.24 RPD Limit 24 24 24 24 24 24 24 24 24 24 24 24 24 24 24 24 24 24 24 24 24 24 24 24 24 24 24 24 24 24 24 24 24 24 24 Page 25 of 41 UNITED STATES ENVIRONMENTAL PROTECTION AGENCY Region 2 Laboratory Final Report Project: PREPA South Coast Power Plant - 2209015 Project Number: 2209015 NVOA GCMS - Quality Control Analyte Batch B209096 Matrix Spike Dup (B209096-MSD1) Butylbenzylphthalate Azobenzene Diethylphthalate Dimethyl Phthalate Di-N-Butyl Phthalate Di-N-Octyl Phthalate Hexachlorobenzene Hexachlorobutadiene Hexachlorocyclopentadiene Hexachloroethane Isophorone Nitrobenzene N-Nitrosodimethylamine N-Nitroso-Di-N-Propylamine N-Nitrosodiphenylamine Pentachlorophenol Phenol Pyrene Surrogate: 2-Fluoroaniline Surrogate: Phenol-D6 Surrogate: Naphthalene-D8 Surrogate: 1-Fluoronaphthalene Surrogate: 2,4-Dibromophenol Surrogate: Anthracene-D10 Surrogate: Chrysene-D12 Matrix Spike Dup (B209096-MSD2) Acenaphthene Acenaphthylene Anthracene Benzo(A)Anthracene Benzo(A)Pyrene Benzo(B)Fluoranthene Benzo(G,H,I)Perylene Benzo(K)Fluoranthene Result Reporting Limit Units Spike Source %REC Level Result %REC Limits RPD RPD Limit Source: 2209014-01 45.8 5.00 ug/L 50.00 ND 91.6 38-152 7.77 24 44.7 5.00 ug/L 50.00 ND 89.4 61-106 13.2 24 33.6 5.00 ug/L 50.00 ND 67.2 31-114 18.4 24 15.2 5.00 ug/L 50.00 ND 30.5 28-120 22.8 24 43.1 5.00 ug/L 50.00 ND 86.2 1-120 11.4 24 52.6 5.00 ug/L 50.00 ND 105 4-146 3.05 24 46.0 5.00 ug/L 50.00 ND 91.9 35-152 13.0 24 35.7 5.00 ug/L 50.00 ND 71.4 24-120 1.03 24 26.1 5.00 ug/L 50.00 ND 52.2 15-76 8.92 24 36.0 5.00 ug/L 50.00 ND 72.1 40-120 3.19 24 37.2 5.00 ug/L 50.00 ND 74.5 21-196 10.9 24 41.7 5.00 ug/L 50.00 ND 83.4 35-180 5.16 24 27.6 5.00 ug/L 50.00 ND 55.3 17-127 25.5 24 39.5 5.00 ug/L 50.00 ND 79.0 43-230 10.8 24 43.1 5.00 ug/L 50.00 ND 86.3 79-139 11.4 24 49.6 5.00 ug/L 50.00 ND 99.2 14-176 6.23 24 19.5 5.00 ug/L 50.00 ND 39.0 5-120 4.45 24 49.7 5.00 ug/L 50.00 ND 99.5 52-120 1.03 24 41.1 ug/L 50.00 82.2 60-140 18.9 ug/L 50.00 37.8 60-140 36.5 ug/L 50.00 73.0 60-140 34.0 ug/L 50.00 68.0 60-140 39.4 ug/L 50.00 78.9 60-140 60.1 ug/L 50.00 120 60-140 36.9 ug/L 50.00 73.7 60-140 Source: 2209015-02 39.8 5.05 ug/L 50.51 ND 78.8 47-145 2.03 24 40.2 5.05 ug/L 50.51 ND 79.5 33-145 1.97 24 44.7 5.05 ug/L 50.51 ND 88.5 27-133 1.85 24 40.3 5.05 ug/L 50.51 ND 79.9 33-143 0.880 24 54.0 5.05 ug/L 50.51 ND 107 17-163 0.332 24 52.7 5.05 ug/L 50.51 ND 104 24-159 1.35 24 51.1 5.05 ug/L 50.51 ND 101 35-219 0.827 24 49.6 5.05 ug/L 50.51 ND 98.2 11-162 0.532 24 U.S.E.P.A Region 2 Laboratory NOTE: The results recorded in this report relate only to the samples as received on the date and at the time noted Reported: 10/3/2022 Page 26 of 41 UNITED STATES ENVIRONMENTAL PROTECTION AGENCY Region 2 Laboratory Final Report Project: PREPA South Coast Power Plant - 2209015 Project Number: 2209015 NVOA GCMS - Quality Control Analyte Result Reporting Limit Units Spike Level Source Result %REC %REC Limits Batch B209096 Matrix Spike Dup (B209096-MSD2) Chrysene Dibenzo(A,H)Anthracene Fluoranthene Fluorene Indeno(1,2,3-Cd)Pyrene Naphthalene Phenanthrene 1,2,4-Trichlorobenzene 2,4,6-Trichlorophenol 2,4-Dichlorophenol 2,4-Dimethylphenol 2,4-Dinitrotoluene 2,6-Dinitrotoluene 2,4-Dinitrophenol 2-Chloronaphthalene 2-Chlorophenol 2-Nitrophenol 3,3'- Dichlorobenzidine 4,6-Dinitro-2-Methylphenol 4-Bromophenyl-Phenylether 4-Chloro-3-Methylphenol 4-Chlorophenyl-Phenylether 4-Nitrophenol Bis(-2-Chloroethoxy)Methane Bis(2-Chloroethyl)Ether Bis(2-Chloroisopropyl)Ether Bis(2-Ethylhexyl)Phthalate Butylbenzylphthalate Azobenzene Diethylphthalate Dimethyl Phthalate Di-N-Butyl Phthalate Di-N-Octyl Phthalate Hexachlorobenzene Hexachlorobutadiene Source: 2209015-02 41.2 5.05 ug/L 53.6 5.05 ug/L 50.8 5.05 ug/L 44.5 5.05 ug/L 56.5 5.05 ug/L 38.2 5.05 ug/L 46.4 5.05 ug/L 39.9 5.05 ug/L 43.7 5.05 ug/L 41.9 5.05 ug/L 29.2 5.05 ug/L 51.2 5.05 ug/L 44.6 5.05 ug/L 70.9 5.05 ug/L 39.6 5.05 ug/L 39.0 5.05 ug/L 45.2 5.05 ug/L 43.2 5.05 ug/L 63.6 5.05 ug/L 46.6 5.05 ug/L 42.0 5.05 ug/L 45.9 5.05 ug/L 23.1 5.05 ug/L 38.0 5.05 ug/L 38.8 5.05 ug/L 36.0 5.05 ug/L 50.1 5.05 ug/L 65.9 5.05 ug/L 44.4 5.05 ug/L 44.8 5.05 ug/L 38.8 5.05 ug/L 50.0 5.05 ug/L 54.2 5.05 ug/L 46.8 5.05 ug/L 40.8 5.05 ug/L 50.51 ND 50.51 ND 50.51 ND 50.51 ND 50.51 ND 50.51 ND 50.51 ND 50.51 ND 50.51 ND 50.51 ND 50.51 ND 50.51 ND 50.51 ND 50.51 ND 50.51 ND 50.51 ND 50.51 ND 50.51 ND 50.51 ND 50.51 ND 50.51 ND 50.51 ND 50.51 ND 50.51 ND 50.51 ND 50.51 ND 50.51 ND 50.51 ND 50.51 ND 50.51 ND 50.51 ND 50.51 ND 50.51 ND 50.51 ND 50.51 ND 81.6 17-168 106 33-227 101 26-137 88.1 59-121 112 39-171 75.6 21-133 91.8 54-120 79.0 44-142 86.6 37-144 83.0 39-135 57.9 32-120 101 39-139 88.2 50-158 140 21-191 78.3 60-120 77.2 23-134 89.4 29-182 85.4 38-262 126 17-181 92.2 53-127 83.2 22-147 90.8 25-158 45.7 9-132 75.2 33-184 76.9 12-158 71.4 36-166 99.2 8-158 130 38-152 88.0 61-106 88.8 31-114 76.9 28-120 98.9 1-120 107 4-146 92.7 35-152 80.7 24-120 U.S.E.P.A Region 2 Laboratory NOTE: The results recorded in this report relate only to the samples as received on the date and at the time noted Reported: 10/3/2022 RPD 1.10 1.44 3.38 2.06 1.17 1.14 2.50 0.274 2.14 1.33 23.7 3.99 3.55 7.04 1.83 0.0518 1.66 2.90 2.49 3.18 0.669 2.31 6.42 0.0253 1.55 1.10 2.62 0.289 1.32 2.14 1.01 1.61 2.85 3.94 0.289 RPD Limit 24 24 24 24 24 24 24 24 24 24 24 24 24 24 24 24 24 24 24 24 24 24 24 24 24 24 24 24 24 24 24 24 24 24 24 Page 27 of 41 UNITED STATES ENVIRONMENTAL PROTECTION AGENCY Region 2 Laboratory Final Report Project: PREPA South Coast Power Plant - 2209015 Project Number: 2209015 NVOA GCMS - Quality Control Analyte Batch B209096 Matrix Spike Dup (B209096-MSD2) Hexachlorocyclopentadiene Hexachloroethane Isophorone Nitrobenzene N-Nitrosodimethylamine N-Nitroso-Di-N-Propylamine N-Nitrosodiphenylamine Pentachlorophenol Phenol Pyrene Surrogate: 2-Fluoroaniline Surrogate: Phenol-D6 Surrogate: Naphthalene-D8 Surrogate: 1-Fluoronaphthalene Surrogate: 2,4-Dibromophenol Surrogate: Anthracene-D10 Surrogate: Chrysene-D12 Result Reporting Limit Units Spike Source %REC Level Result %REC Limits RPD RPD Limit Source: 2209015-02 38.6 5.05 ug/L 50.51 ND 76.5 15-76 4.59 24 41.2 5.05 ug/L 50.51 ND 81.7 40-120 1.50 24 38.4 5.05 ug/L 50.51 ND 76.0 21-196 0.900 24 41.6 5.05 ug/L 50.51 ND 82.4 35-180 0.835 24 26.9 5.05 ug/L 50.51 ND 53.2 17-127 8.77 24 40.2 5.05 ug/L 50.51 ND 79.6 43-230 0.854 24 43.5 5.05 ug/L 50.51 ND 86.0 79-139 2.15 24 48.4 5.05 ug/L 50.51 ND 95.8 14-176 0.194 24 17.9 5.05 ug/L 50.51 ND 35.5 5-120 5.01 24 51.2 5.05 ug/L 50.51 ND 101 52-120 2.55 24 39.7 ug/L 50.51 78.6 60-140 17.2 ug/L 50.51 34.1 60-140 39.4 ug/L 50.51 78.0 60-140 39.1 ug/L 50.51 77.4 60-140 42.1 ug/L 50.51 83.4 60-140 61.8 ug/L 50.51 122 60-140 38.8 ug/L 50.51 76.8 60-140 U.S.E.P.A Region 2 Laboratory NOTE: The results recorded in this report relate only to the samples as received on the date and at the time noted Reported: 10/3/2022 Page 28 of 41 UNITED STATES ENVIRONMENTAL PROTECTION AGENCY Region 2 Laboratory Final Report Project: PREPA South Coast Power Plant - 2209015 Project Number: 2209015 Pest/PCBs GC - Quality Control Analyte Result Reporting Limit Units Spike Source %REC Level Result %REC Limits RPD Batch B209103 Blank (B209103-BLK1) alpha-BHC alpha-BHC [2C] gamma-BHC (Lindane) gamma-BHC (Lindane) [2C] beta-BHC beta-BHC [2C] delta-BHC delta-BHC [2C] Heptachlor Heptachlor [2C] Aldrin Aldrin [2C] Heptachlor epoxide Heptachlor epoxide [2C] gamma-Chlordane gamma-Chlordane [2C] alpha-Chlordane alpha-Chlordane [2C] Endosulfan I Endosulfan I [2C] 4,4'-DDE 4,4'-DDE [2C] Dieldrin Dieldrin [2C] Endrin Endrin [2C] 4,4'-DDD 4,4'-DDD [2C] Endosulfan II Endosulfan II [2C] 4,4'-DDT 4,4'-DDT [2C] Endrin aldehyde Endrin aldehyde [2C] Methoxychlor --- U 0.002 ug/L --- U 0.002 ug/L --- U 0.002 ug/L --- U 0.002 ug/L --- U 0.002 ug/L --- U 0.002 ug/L --- U 0.002 ug/L --- U 0.002 ug/L --- U 0.002 ug/L --- U 0.002 ug/L --- U 0.002 ug/L --- U 0.002 ug/L --- U 0.002 ug/L --- U 0.002 ug/L --- U 0.002 ug/L --- U 0.002 ug/L --- U 0.002 ug/L --- U 0.002 ug/L --- U 0.002 ug/L --- U 0.002 ug/L --- U 0.005 ug/L --- U 0.005 ug/L --- U 0.005 ug/L --- U 0.005 ug/L --- U 0.005 ug/L --- U 0.005 ug/L --- U 0.005 ug/L --- U 0.005 ug/L --- U 0.005 ug/L --- U 0.005 ug/L --- U 0.005 ug/L --- U 0.005 ug/L --- U 0.005 ug/L --- U 0.005 ug/L --- U 0.025 ug/L U.S.E.P.A Region 2 Laboratory NOTE: The results recorded in this report relate only to the samples as received on the date and at the time noted Reported: 10/3/2022 RPD Limit Page 29 of 41 Analyte Batch B209103 Blank (B209103-BLK1) Methoxychlor [2C] Endosulfan sulfate Endosulfan sulfate [2C] Endrin ketone Endrin ketone [2C] Toxaphene Toxaphene [2C] Chlordane Chlordane [2C] tech-Chlordane tech-Chlordane [2C] Aroclor 1016 Aroclor 1016 [2C] Aroclor 1221 Aroclor 1221 [2C] Aroclor 1232 Aroclor 1232 [2C] Aroclor 1242 Aroclor 1242 [2C] Aroclor 1248 Aroclor 1248 [2C] Aroclor 1254 Aroclor 1254 [2C] Aroclor 1260 Aroclor 1260 [2C] Aroclor 1262 Aroclor 1262 [2C] Aroclor 1268 Aroclor 1268 [2C] Surrogate: TCMX Surrogate: TCMX [2C] Surrogate: DCB Surrogate: DCB [2C] UNITED STATES ENVIRONMENTAL PROTECTION AGENCY Region 2 Laboratory Final Report Project: PREPA South Coast Power Plant - 2209015 Project Number: 2209015 Pest/PCBs GC - Quality Control Result Reporting Limit Units Spike Source %REC Level Result %REC Limits RPD RPD Limit --- U --- U --- U --- U --- U --- U --- U --- U --- U --- U --- U --- U --- U --- U --- U --- U --- U --- U --- U --- U --- U --- U --- U --- U --- U --- U --- U --- U --- U 0.0358 0.0358 0.0365 0.0344 0.025 ug/L 0.005 ug/L 0.005 ug/L 0.005 ug/L 0.005 ug/L 0.188 ug/L 0.188 ug/L 0.062 ug/L 0.062 ug/L 0.062 ug/L 0.062 ug/L 0.031 ug/L 0.031 ug/L 0.062 ug/L 0.062 ug/L 0.031 ug/L 0.031 ug/L 0.031 ug/L 0.031 ug/L 0.031 ug/L 0.031 ug/L 0.031 ug/L 0.031 ug/L 0.031 ug/L 0.031 ug/L 0.031 ug/L 0.031 ug/L 0.031 ug/L 0.031 ug/L ug/L ug/L ug/L ug/L 0.06000 0.06000 0.06000 0.06000 59.7 23-101 59.6 23-101 60.8 25-107 57.3 25-107 U.S.E.P.A Region 2 Laboratory NOTE: The results recorded in this report relate only to the samples as received on the date and at the time noted Reported: 10/3/2022 Page 30 of 41 UNITED STATES ENVIRONMENTAL PROTECTION AGENCY Region 2 Laboratory Final Report Project: PREPA South Coast Power Plant - 2209015 Project Number: 2209015 Pest/PCBs GC - Quality Control Analyte Batch B209103 LCS (B209103-BS1) alpha-BHC alpha-BHC [2C] gamma-BHC (Lindane) gamma-BHC (Lindane) [2C] beta-BHC beta-BHC [2C] delta-BHC delta-BHC [2C] Heptachlor Heptachlor [2C] Aldrin Aldrin [2C] Heptachlor epoxide Heptachlor epoxide [2C] Endosulfan I Endosulfan I [2C] 4,4'-DDE 4,4'-DDE [2C] Dieldrin Dieldrin [2C] Endrin Endrin [2C] 4,4'-DDD 4,4'-DDD [2C] Endosulfan II Endosulfan II [2C] 4,4'-DDT 4,4'-DDT [2C] Endrin aldehyde Endrin aldehyde [2C] Endosulfan sulfate Endosulfan sulfate [2C] Surrogate: TCMX Surrogate: TCMX [2C] Result Reporting Limit Units Spike Source %REC Level Result %REC Limits RPD RPD Limit 0.02 0.02 0.02 0.02 0.02 0.02 0.02 0.02 0.01 0.01 0.02 0.02 0.02 0.02 0.02 0.02 0.04 0.04 0.04 0.04 0.04 0.04 0.04 0.04 0.04 0.04 0.04 0.04 0.04 0.04 0.04 0.04 0.0415 0.0410 0.002 ug/L 0.002 ug/L 0.002 ug/L 0.002 ug/L 0.002 ug/L 0.002 ug/L 0.002 ug/L 0.002 ug/L 0.002 ug/L 0.002 ug/L 0.002 ug/L 0.002 ug/L 0.002 ug/L 0.002 ug/L 0.002 ug/L 0.002 ug/L 0.005 ug/L 0.005 ug/L 0.005 ug/L 0.005 ug/L 0.005 ug/L 0.005 ug/L 0.005 ug/L 0.005 ug/L 0.005 ug/L 0.005 ug/L 0.005 ug/L 0.005 ug/L 0.005 ug/L 0.005 ug/L 0.005 ug/L 0.005 ug/L ug/L ug/L 0.02000 0.02000 0.02000 0.02000 0.02000 0.02000 0.02000 0.02000 0.02000 0.02000 0.02000 0.02000 0.02000 0.02000 0.02000 0.02000 0.04000 0.04000 0.04000 0.04000 0.04000 0.04000 0.04000 0.04000 0.04000 0.04000 0.04000 0.04000 0.04000 0.04000 0.04000 0.04000 0.06000 0.06000 83.2 37-140 83.8 37-140 88.9 32-140 83.4 32-140 77.9 17-147 77.3 17-147 99.8 19-140 93.6 19-140 65.2 34-140 65.9 34-140 93.4 42-140 89.1 42-140 92.6 37-142 87.7 37-142 88.9 45-153 90.6 45-153 104 30-145 100 30-145 102 36-146 97.2 36-146 110 30-147 99.9 30-147 102 31-141 98.1 31-141 96.2 50-202 91.4 50-202 108 25-160 103 25-160 93.4 10-154 92.1 10-154 107 26-144 101 26-144 69.1 23-101 68.4 23-101 U.S.E.P.A Region 2 Laboratory NOTE: The results recorded in this report relate only to the samples as received on the date and at the time noted Reported: 10/3/2022 Page 31 of 41 UNITED STATES ENVIRONMENTAL PROTECTION AGENCY Region 2 Laboratory Final Report Project: PREPA South Coast Power Plant - 2209015 Project Number: 2209015 Pest/PCBs GC - Quality Control Analyte Batch B209103 LCS (B209103-BS1) Surrogate: DCB Surrogate: DCB [2C] LCS (B209103-BS2) Aroclor 1016 Aroclor 1016 [2C] Aroclor 1260 Aroclor 1260 [2C] Surrogate: TCMX Surrogate: TCMX [2C] Surrogate: DCB Surrogate: DCB [2C] LCS Dup (B209103-BSD1) alpha-BHC alpha-BHC [2C] gamma-BHC (Lindane) gamma-BHC (Lindane) [2C] beta-BHC beta-BHC [2C] delta-BHC delta-BHC [2C] Heptachlor Heptachlor [2C] Aldrin Aldrin [2C] Heptachlor epoxide Heptachlor epoxide [2C] Endosulfan I Endosulfan I [2C] 4,4'-DDE 4,4'-DDE [2C] Dieldrin Dieldrin [2C] Endrin Result Reporting Limit Units Spike Source %REC Level Result %REC Limits RPD RPD Limit 0.0386 0.0361 0.25 0.20 0.22 0.20 0.0421 0.0409 0.0311 0.0298 0.02 0.02 0.02 0.02 0.01 0.01 0.02 0.02 0.01 0.01 0.02 0.02 0.02 0.02 0.02 0.02 0.04 0.04 0.04 0.04 0.04 ug/L 0.06000 ug/L 0.06000 0.031 ug/L 0.031 ug/L 0.031 ug/L 0.031 ug/L ug/L ug/L ug/L ug/L 0.2500 0.2500 0.2500 0.2500 0.06000 0.06000 0.06000 0.06000 0.002 ug/L 0.002 ug/L 0.002 ug/L 0.002 ug/L 0.002 ug/L 0.002 ug/L 0.002 ug/L 0.002 ug/L 0.002 ug/L 0.002 ug/L 0.002 ug/L 0.002 ug/L 0.002 ug/L 0.002 ug/L 0.002 ug/L 0.002 ug/L 0.005 ug/L 0.005 ug/L 0.005 ug/L 0.005 ug/L 0.005 ug/L 0.02000 0.02000 0.02000 0.02000 0.02000 0.02000 0.02000 0.02000 0.02000 0.02000 0.02000 0.02000 0.02000 0.02000 0.02000 0.02000 0.04000 0.04000 0.04000 0.04000 0.04000 64.3 25-107 60.2 25-107 99.4 50-140 81.8 50-140 88.6 8-140 81.4 8-140 70.2 23-101 68.2 23-101 51.8 25-107 49.7 25-107 77.4 37-140 7.18 36 78.5 37-140 6.54 36 86.7 32-140 2.49 39 77.7 32-140 7.16 39 73.8 17-147 5.38 44 74.9 17-147 3.24 44 96.7 19-140 3.11 52 87.1 19-140 7.21 52 70.1 34-140 7.21 43 59.7 34-140 9.90 43 87.1 42-140 7.07 35 85.8 42-140 3.74 35 92.9 37-142 0.399 26 83.0 37-142 5.46 26 89.2 45-153 0.359 28 85.8 45-153 5.39 28 102 30-145 1.68 35 95.4 30-145 4.67 35 101 36-146 1.28 49 92.5 36-146 5.00 49 110 30-147 0.173 48 U.S.E.P.A Region 2 Laboratory NOTE: The results recorded in this report relate only to the samples as received on the date and at the time noted Reported: 10/3/2022 Page 32 of 41 UNITED STATES ENVIRONMENTAL PROTECTION AGENCY Region 2 Laboratory Final Report Project: PREPA South Coast Power Plant - 2209015 Project Number: 2209015 Pest/PCBs GC - Quality Control Analyte Batch B209103 LCS Dup (B209103-BSD1) Endrin [2C] 4,4'-DDD 4,4'-DDD [2C] Endosulfan II Endosulfan II [2C] 4,4'-DDT 4,4'-DDT [2C] Endrin aldehyde Endrin aldehyde [2C] Endosulfan sulfate Endosulfan sulfate [2C] Surrogate: TCMX Surrogate: TCMX [2C] Surrogate: DCB Surrogate: DCB [2C] LCS Dup (B209103-BSD2) Aroclor 1016 Aroclor 1016 [2C] Aroclor 1260 Aroclor 1260 [2C] Surrogate: TCMX Surrogate: TCMX [2C] Surrogate: DCB Surrogate: DCB [2C] Matrix Spike (B209103-MS1) alpha-BHC alpha-BHC [2C] gamma-BHC (Lindane) gamma-BHC (Lindane) [2C] beta-BHC beta-BHC [2C] delta-BHC delta-BHC [2C] Result Reporting Limit Units Spike Source %REC Level Result %REC Limits RPD RPD Limit 0.04 0.04 0.04 0.04 0.03 0.04 0.04 0.04 0.04 0.04 0.04 0.0402 0.0378 0.0375 0.0353 0.005 ug/L 0.005 ug/L 0.005 ug/L 0.005 ug/L 0.005 ug/L 0.005 ug/L 0.005 ug/L 0.005 ug/L 0.005 ug/L 0.005 ug/L 0.005 ug/L ug/L ug/L ug/L ug/L 0.04000 0.04000 0.04000 0.04000 0.04000 0.04000 0.04000 0.04000 0.04000 0.04000 0.04000 0.06000 0.06000 0.06000 0.06000 96.0 30-147 3.95 48 100 31-141 1.14 39 93.3 31-141 5.09 39 95.4 50-202 0.890 53 87.1 50-202 4.82 53 107 25-160 1.11 42 98.0 25-160 5.37 42 96.5 10-154 3.26 30 88.1 10-154 4.38 30 105 26-144 2.44 38 96.7 26-144 4.80 38 67.0 23-101 63.1 23-101 62.4 25-107 58.8 25-107 0.26 0.20 0.23 0.20 0.0397 0.0383 0.0319 0.0308 0.031 ug/L 0.031 ug/L 0.031 ug/L 0.031 ug/L ug/L ug/L ug/L ug/L 0.2500 0.2500 0.2500 0.2500 0.06000 0.06000 0.06000 0.06000 105 50-140 5.30 36 78.8 50-140 3.74 36 91.0 8-140 2.62 38 81.1 8-140 0.318 38 66.1 23-101 63.9 23-101 53.1 25-107 51.4 25-107 Source: 2209015-02 0.03 0.003 ug/L 0.01 0.003 ug/L 0.01 0.003 ug/L 0.01 0.003 ug/L 0.02 0.003 ug/L 0.01 0.003 ug/L 0.01 0.003 ug/L 0.01 0.003 ug/L 0.02041 ND 0.02041 ND 0.02041 ND 0.02041 ND 0.02041 ND 0.02041 ND 0.02041 ND 0.02041 ND 165 37-140 56.1 37-140 66.7 32-140 53.6 32-140 74.7 17-147 66.8 17-147 65.4 19-140 56.6 19-140 U.S.E.P.A Region 2 Laboratory NOTE: The results recorded in this report relate only to the samples as received on the date and at the time noted Reported: 10/3/2022 Page 33 of 41 Analyte Batch B209103 Matrix Spike (B209103-MS1) Heptachlor Heptachlor [2C] Aldrin Aldrin [2C] Heptachlor epoxide Heptachlor epoxide [2C] Endosulfan I Endosulfan I [2C] 4,4'-DDE 4,4'-DDE [2C] Dieldrin Dieldrin [2C] Endrin Endrin [2C] 4,4'-DDD 4,4'-DDD [2C] Endosulfan II Endosulfan II [2C] 4,4'-DDT 4,4'-DDT [2C] Endrin aldehyde Endrin aldehyde [2C] Endosulfan sulfate Endosulfan sulfate [2C] Surrogate: TCMX Surrogate: TCMX [2C] Surrogate: DCB Surrogate: DCB [2C] UNITED STATES ENVIRONMENTAL PROTECTION AGENCY Region 2 Laboratory Final Report Project: PREPA South Coast Power Plant - 2209015 Project Number: 2209015 Pest/PCBs GC - Quality Control Result Reporting Limit Units Spike Source %REC Level Result %REC Limits RPD RPD Limit Source: 2209015-02 --- U 0.003 ug/L 0.009 0.003 ug/L 0.01 0.003 ug/L 0.01 0.003 ug/L 0.01 0.003 ug/L 0.01 0.003 ug/L 0.01 0.003 ug/L 0.01 0.003 ug/L 0.02 0.005 ug/L 0.02 0.005 ug/L 0.03 0.005 ug/L 0.03 0.005 ug/L 0.03 0.005 ug/L 0.03 0.005 ug/L 0.03 0.005 ug/L 0.02 0.005 ug/L 0.03 0.005 ug/L 0.02 0.005 ug/L 0.03 0.005 ug/L 0.03 0.005 ug/L 0.03 0.005 ug/L 0.03 0.005 ug/L 0.03 0.005 ug/L 0.03 0.005 ug/L 0.0322 ug/L 0.0278 ug/L 0.0403 ug/L 0.0378 ug/L 0.02041 ND 0.02041 ND 0.02041 ND 0.02041 ND 0.02041 ND 0.02041 ND 0.02041 ND 0.02041 ND 0.04082 ND 0.04082 ND 0.04082 ND 0.04082 ND 0.04082 ND 0.04082 ND 0.04082 ND 0.04082 ND 0.04082 ND 0.04082 ND 0.04082 ND 0.04082 ND 0.04082 ND 0.04082 ND 0.04082 ND 0.04082 ND 0.06122 0.06122 0.06122 0.06122 34-140 46.5 34-140 65.8 42-140 53.4 42-140 60.9 37-142 60.8 37-142 65.2 45-153 51.5 45-153 60.2 30-145 59.2 30-145 64.8 36-146 65.6 36-146 74.0 30-147 64.5 30-147 65.7 31-141 57.7 31-141 65.2 50-202 53.3 50-202 61.8 25-160 78.3 25-160 68.6 10-154 64.3 10-154 71.5 26-144 71.7 26-144 52.7 23-101 45.5 23-101 65.8 25-107 61.7 25-107 U.S.E.P.A Region 2 Laboratory NOTE: The results recorded in this report relate only to the samples as received on the date and at the time noted Reported: 10/3/2022 Page 34 of 41 UNITED STATES ENVIRONMENTAL PROTECTION AGENCY Region 2 Laboratory Final Report Project: PREPA South Coast Power Plant - 2209015 Project Number: 2209015 Pest/PCBs GC - Quality Control Analyte Batch B209103 Matrix Spike (B209103-MS2) Aroclor 1016 Aroclor 1016 [2C] Aroclor 1260 Aroclor 1260 [2C] Surrogate: TCMX Surrogate: TCMX [2C] Surrogate: DCB Surrogate: DCB [2C] Matrix Spike Dup (B209103-MSD2) Aroclor 1016 Aroclor 1016 [2C] Aroclor 1260 Aroclor 1260 [2C] Surrogate: TCMX Surrogate: TCMX [2C] Surrogate: DCB Surrogate: DCB [2C] Batch S209042 Performance Mix (S209042-PEM1) 4,4'-DDE 4,4'-DDE [2C] Endrin Endrin [2C] 4,4'-DDD 4,4'-DDD [2C] 4,4'-DDT 4,4'-DDT [2C] Endrin aldehyde Endrin aldehyde [2C] Endrin ketone Endrin ketone [2C] Result Reporting Limit Units Spike Source %REC Level Result %REC Limits RPD RPD Limit Source: 2209015-02 0.26 0.030 ug/L 0.21 0.030 ug/L 0.26 0.030 ug/L 0.24 0.030 ug/L 0.0397 ug/L 0.0355 ug/L 0.0445 ug/L 0.0431 ug/L 0.2439 ND 0.2439 ND 0.2439 ND 0.2439 ND 0.05854 0.05854 0.05854 0.05854 107 50-140 87.2 50-140 105 8-140 96.8 8-140 67.9 23-101 60.6 23-101 75.9 25-107 73.7 25-107 Source: 2209015-02 0.26 0.031 ug/L 0.2451 ND 105 50-140 1.85 36 0.26 0.031 ug/L 0.2451 ND 106 50-140 19.7 36 0.24 0.031 ug/L 0.2451 ND 97.2 8-140 8.04 38 0.22 0.031 ug/L 0.2451 ND 89.0 8-140 8.49 38 0.0384 0.0334 0.0423 0.0397 ug/L 0.05882 ug/L 0.05882 ug/L 0.05882 ug/L 0.05882 65.3 23-101 56.8 23-101 71.9 25-107 67.5 25-107 1.03 ug/L 0-200 1.37 ug/L 0-200 113 ug/L 100.0 113 0-200 120 ug/L 100.0 120 0-200 3.75 ug/L 0-200 3.14 ug/L 0-200 115 ug/L 100.0 115 0-200 119 ug/L 100.0 119 0-200 3.61 ug/L 0-200 1.29 ug/L 0-200 6.93 ug/L 0-200 4.18 ug/L 0-200 U.S.E.P.A Region 2 Laboratory NOTE: The results recorded in this report relate only to the samples as received on the date and at the time noted Reported: 10/3/2022 Page 35 of 41 Analyte Batch B209121 Blank (B209121-BLK1) Oil & Grease LCS (B209121-BS1) Oil & Grease LCS Dup (B209121-BSD1) Oil & Grease Matrix Spike (B209121-MS1) Oil & Grease Matrix Spike (B209121-MS2) Oil & Grease Matrix Spike (B209121-MS3) Oil & Grease Matrix Spike (B209121-MS4) Oil & Grease UNITED STATES ENVIRONMENTAL PROTECTION AGENCY Region 2 Laboratory Final Report Project: PREPA South Coast Power Plant - 2209015 Project Number: 2209015 GC - Sanitary - Quality Control Result Reporting Limit Units Spike Source %REC Level Result %REC Limits RPD RPD Limit --- U 5.00 mg/L 34.4 5.00 mg/L 40.00 86 78-114 37.3 5.00 mg/L 40.00 93 78-114 8 20 Source: 2209013-02 41.8 5.00 mg/L 51.28 ND 82 78-114 Source: 2209014-01 42.2 5.00 mg/L 51.28 ND 82 78-114 Source: 2209015-04 39.1 5.00 mg/L 45.98 ND 85 78-114 Source: 2209016-02 42.2 5.00 mg/L 48.78 ND 87 78-114 U.S.E.P.A Region 2 Laboratory NOTE: The results recorded in this report relate only to the samples as received on the date and at the time noted Reported: 10/3/2022 Page 36 of 41 Analyte Batch B209117 Blank (B209117-BLK1) Antimony Arsenic Beryllium Cadmium Chromium Copper Iron Lead Nickel Selenium Silver Thallium Zinc LCS (B209117-BS1) Antimony Arsenic Beryllium Cadmium Chromium Copper Iron Lead Nickel Selenium Silver Thallium Zinc UNITED STATES ENVIRONMENTAL PROTECTION AGENCY Region 2 Laboratory Final Report Project: PREPA South Coast Power Plant - 2209015 Project Number: 2209015 Metals ICP - Quality Control Result Reporting Limit Units Spike Source %REC Level Result %REC Limits RPD RPD Limit --- U --- U --- U --- U --- U --- U --- U --- U --- U --- U --- U --- U --- U 188 185 190 190 192 190 4770 191 191 183 191 187 188 20.0 ug/L 8.00 ug/L 3.00 ug/L 3.00 ug/L 5.00 ug/L 10.0 ug/L 50.0 ug/L 8.00 ug/L 20.0 ug/L 20.0 ug/L 5.00 ug/L 20.0 ug/L 20.0 ug/L 20.0 ug/L 8.00 ug/L 3.00 ug/L 3.00 ug/L 5.00 ug/L 10.0 ug/L 50.0 ug/L 8.00 ug/L 20.0 ug/L 20.0 ug/L 5.00 ug/L 20.0 ug/L 20.0 ug/L 200.0 200.0 200.0 200.0 200.0 200.0 5000 200.0 200.0 200.0 200.0 200.0 200.0 94.2 85-115 92.7 85-115 95.1 85-115 95.0 85-115 95.9 85-115 94.9 85-115 95.5 85-115 95.6 85-115 95.5 85-115 91.4 85-115 95.4 85-115 93.6 85-115 94.2 85-115 U.S.E.P.A Region 2 Laboratory NOTE: The results recorded in this report relate only to the samples as received on the date and at the time noted Reported: 10/3/2022 Page 37 of 41 Analyte Batch B209117 LCS Dup (B209117-BSD1) Antimony Arsenic Beryllium Cadmium Chromium Copper Iron Lead Nickel Selenium Silver Thallium Zinc Matrix Spike (B209117-MS1) Cadmium Lead Nickel Thallium Matrix Spike (B209117-MS2) Arsenic Cadmium Copper Nickel Silver Thallium UNITED STATES ENVIRONMENTAL PROTECTION AGENCY Region 2 Laboratory Final Report Project: PREPA South Coast Power Plant - 2209015 Project Number: 2209015 Metals ICP - Quality Control Result Reporting Limit Units Spike Source %REC Level Result %REC Limits RPD RPD Limit 191 186 196 192 194 192 4920 194 192 188 192 190 190 20.0 ug/L 8.00 ug/L 3.00 ug/L 3.00 ug/L 5.00 ug/L 10.0 ug/L 50.0 ug/L 8.00 ug/L 20.0 ug/L 20.0 ug/L 5.00 ug/L 20.0 ug/L 20.0 ug/L 200.0 200.0 200.0 200.0 200.0 200.0 5000 200.0 200.0 200.0 200.0 200.0 200.0 95.3 85-115 1.17 20 93.2 85-115 0.527 20 98.1 85-115 3.12 20 95.8 85-115 0.755 20 96.8 85-115 0.944 20 95.9 85-115 1.05 20 98.5 85-115 3.12 20 96.9 85-115 1.29 20 96.1 85-115 0.668 20 94.1 85-115 2.90 20 96.1 85-115 0.783 20 94.8 85-115 1.37 20 95.0 85-115 0.830 20 Source: 2209013-02 166 3.00 ug/L 175 8.00 ug/L 193 20.0 ug/L 169 20.0 ug/L 200.0 ND 200.0 2.40 200.0 19.0 200.0 7.03 82.8 80-120 86.4 80-120 87.2 80-120 81.1 80-120 Source: 2209014-01 196 8.00 ug/L 178 3.00 ug/L 213 10.0 ug/L 188 20.0 ug/L 201 5.00 ug/L 170 20.0 ug/L 200.0 3.57 200.0 ND 200.0 3.06 200.0 8.85 200.0 ND 200.0 7.07 96.0 80-120 88.8 80-120 105 80-120 89.6 80-120 101 80-120 81.4 80-120 U.S.E.P.A Region 2 Laboratory NOTE: The results recorded in this report relate only to the samples as received on the date and at the time noted Reported: 10/3/2022 Page 38 of 41 UNITED STATES ENVIRONMENTAL PROTECTION AGENCY Region 2 Laboratory Final Report Project: PREPA South Coast Power Plant - 2209015 Project Number: 2209015 Metals ICP - Quality Control Analyte Batch B209117 Matrix Spike (B209117-MS3) Copper Zinc Matrix Spike (B209117-MS4) Zinc Matrix Spike Dup (B209117-MSD1) Cadmium Lead Nickel Thallium Matrix Spike Dup (B209117-MSD2) Arsenic Cadmium Copper Nickel Silver Thallium Matrix Spike Dup (B209117-MSD3) Copper Zinc Matrix Spike Dup (B209117-MSD4) Zinc Result Reporting Limit Units Spike Source %REC Level Result %REC Limits RPD RPD Limit Source: 2209015-01 289 10.0 ug/L 146 20.0 ug/L 200.0 ND 200.0 ND 145 80-120 72.9 80-120 Source: 2209016-01 137 20.0 ug/L 200.0 1.99 67.5 80-120 Source: 2209013-02 184 15.0 ug/L 200.0 ND 91.9 80-120 10.4 10 194 40.0 ug/L 200.0 ND 97.1 80-120 10.3 10 216 100 ug/L 200.0 19.0 98.8 80-120 11.3 10 200 100 ug/L 200.0 ND 99.8 80-120 16.5 10 Source: 2209014-01 187 40.0 ug/L 200.0 ND 93.4 80-120 4.55 10 183 15.0 ug/L 200.0 ND 91.4 80-120 2.84 10 204 50.0 ug/L 200.0 ND 102 80-120 4.63 10 190 100 ug/L 200.0 ND 95.0 80-120 1.08 10 187 25.0 ug/L 200.0 ND 93.4 80-120 7.48 10 198 100 ug/L 200.0 ND 98.8 80-120 15.1 10 Source: 2209015-01 248 50.0 ug/L 200.0 ND 124 80-120 15.4 10 190 100 ug/L 200.0 ND 94.8 80-120 26.2 10 Source: 2209016-01 182 100 ug/L 200.0 ND 91.0 80-120 28.3 10 U.S.E.P.A Region 2 Laboratory NOTE: The results recorded in this report relate only to the samples as received on the date and at the time noted Reported: 10/3/2022 Page 39 of 41 Analyte Batch B209126 Blank (B209126-BLK1) Mercury LCS (B209126-BS1) Mercury LCS Dup (B209126-BSD1) Mercury Matrix Spike (B209126-MS1) Mercury UNITED STATES ENVIRONMENTAL PROTECTION AGENCY Region 2 Laboratory Final Report Project: PREPA South Coast Power Plant - 2209015 Project Number: 2209015 Mercury CVAA - Quality Control Result Reporting Limit Units Spike Source %REC Level Result %REC Limits RPD RPD Limit --- U 0.050 ug/L 0.952 0.050 ug/L 1.000 95.2 85-115 0.953 0.050 ug/L 1.000 95.3 85-115 0.105 20 Source: 2209015-02 0.957 0.050 ug/L 1.000 ND 95.7 80-120 U.S.E.P.A Region 2 Laboratory NOTE: The results recorded in this report relate only to the samples as received on the date and at the time noted Reported: 10/3/2022 Page 40 of 41 Analyte Batch B209094 Blank (B209094-BLK1) Color LCS (B209094-BS1) Color LCS Dup (B209094-BSD1) Color Duplicate (B209094-DUP1) Color Batch B209115 Blank (B209115-BLK1) Residue, Non-Filterable LCS (B209115-BS1) Residue, Non-Filterable LCS Dup (B209115-BSD1) Residue, Non-Filterable Duplicate (B209115-DUP1) Residue, Non-Filterable UNITED STATES ENVIRONMENTAL PROTECTION AGENCY Region 2 Laboratory Final Report Project: PREPA South Coast Power Plant - 2209015 Project Number: 2209015 Sanitary - Quality Control Result Reporting Limit Units Spike Source %REC Level Result %REC Limits RPD RPD Limit <5 5.00 Color Units 40.0 5.00 Color Units 40.00 100 85-115 40.0 5.00 Color Units 40.00 100 85-115 0.00 20 Source: 2209015-01 <5 5.00 Color Units <5 20 --- U 10.0 mg/L 52.0 10.0 mg/L 55.10 94.4 85-115 54.0 10.0 mg/L 55.10 98.0 85-115 3.77 20 Source: 2209013-02 3.00 10.0 mg/L ND 20 U.S.E.P.A Region 2 Laboratory NOTE: The results recorded in this report relate only to the samples as received on the date and at the time noted Reported: 10/3/2022 Page 41 of 41 PREPA - South Coast Power Plant, Guayanilla, PR NPDES Permit: PR0001147 Insp. Dates: September 14-15, 2022 8.0 Photographs PREPA - South Coast Power Plant, Guayanilla, PR NPDES Permit: PR0001147 Insp. Dates: September 14-15, 2022 Photo #1. On-site and grab samples were collected from Outfall 001 monitoring location. Photo #2. Samples were collected from Internal Outfall 001c monitoring location. PREPA - South Coast Power Plant, Guayanilla, PR NPDES Permit: PR0001147 Insp. Dates: September 14-15, 2022 Photo #3. Samples were collected from Internal Outfall 001e monitoring location. Photo #4. An on-site grab sample was collected from the intake structure for temperature. PREPA - South Coast Power Plant, Guayanilla, PR NPDES Permit: PR0001147 Insp. Dates: September 14-15, 2022 Photo #5. Floating scum was observed in Outfall 001 canal prior to the monitoring location. Photo #6. Solids were observed in the water column of Outfall 001 discharge.