ML16048A205
| ML16048A205 | |
| Person / Time | |
|---|---|
| Site: | Diablo Canyon  |
| Issue date: | 06/30/2015 |
| From: | Pacific Gas & Electric Co |
| To: | Office of Nuclear Reactor Regulation |
| Shared Package | |
| ML16048A230 | List:
|
| References | |
| DCL-15-142, CAC MF4019, CAC MF4020 | |
| Download: ML16048A205 (49) | |
Text
i \'1SWR-03 STORM WATER POLLUTION PREVENTION PLANPacific Gas & Electric Company -Diablo Canyon Power Plant9 Miles NW of Avila Beach, CaliforniaJune 30, 2015 EXECUTIVE SUMMARYThis storm water pollution prevention plan (SWPPP) was prepared in accordance with the requirementsof the California State Water Resources Control Board (SWRCB) Industrial Storm Water Permit forDischarges Associated with Industrial Activity (Order No. 2014-0057-DWQ) which was adopted onApril 1, 2014. This permit replaces Order No. 97-03-DWQ which had been in effect from August 1,1997 through June 30, 2015.This SWPPP identifies and evaluates all sources of pollutants that may affect the quality of industrialstorm water discharges and authorized non-storm water discharges, identifies and describes theminimum best management practices (BMPs) and any advanced BMPs implemented to reduce orprevent pollutants in industrial storm water discharges and authorized non-storm water discharges.Pacific Gas and Electric Company shall implement this updated SWPPP commencing July 01, 2015.The SWPPP will be revised whenever necessary, and will be certified and submitted electronically tothe SWRCB via the Storm Water Multi-Application and Tracking System (SMARTS).
TAJ3LE OF CONTENTSPageEXECUTIVE SUMMARYiLIST OF TABLES ivLIST OF FIGURES (insert site map and other figures here -see permit section X.E.) iv1. INTRODUCTION11.1 Background and Requirements 11.2 SWPPP Performance Standards 21.3 SWPPP Implementation and Revisions 21.4 General Facility Information 21.5 Pollution Prevention Team 32. SITE LAYOUT AND EXISTING FACILITY PLANS (PERMIT SECTION X.E)53. LIST OF INDUSTRIAL MATERIALS (PERMIT SECTION X.F) 73.1 List of Industrial Materials Handled at the Facility 74. DESCRIPTION OF POTENTIAL POLLUTANT SOURCES (PERMIT SECTION X.G) 84.1 Industrial Processes 84.2 Material Receiving, Shipping and Handling '84.3 Dust and Particle Generating Activities 84.4 Significant Spills and Leaks 94.5 Non-Storm Water Discharges 94.6 Erodible Surfaces 105. ASSESSMENT OF POTENTIAL POLLUTANT SOURCES (PERMIT SECTION X.G.2) 115.1 Narrative Assessment of Likely Pollutants Present in Storm Water Discharges 115.2 Identification of Additional BMPs 115.3 Identification of Drainage Areas with No Exposure 115.4 Identification of Additional Parameters 116. STORM WATER BEST MANAGEMENT PRACTICES (PERMIT SECTION X.Hl) 126.1 Minimum BMPs (Permit Section X.H. 1) 126.1.1 Good Housekeeping 126.1.2 Preventative Maintenance 136.1.3 Spill and Leak Prevention and Response 136.1.4 Material Handling and Waste Management 146.1.5 Erosion and Sediment Controls 146.1.6 Employee Training Program 156.1.7 Quality Assurance and Record-Keeping 156.2 Advanced BMPs (Permit Section X.H.2) 156.2.1 Exposure Minimization BMPs 156.2.2 Storm Water Containment and Discharge Reduction BMPs 166.2.3 Treatment Control BMPs 16ii TABLE OF CONTENTSPage6.2.4 Other Advanced BMPs 167. TEMPORARY SUSPENSION OF ACTIVITIES (PERMIT SECTION X.H.3) 16BMP SUMMARY (PERMIT SECTIONS X.H.4 AND X.H.5) 178. MONITORING IMPLEMENTATION PLAN (PERMIT SECTION X.I) 199. ANNUAL REPORTING (PERMIT SECTIONS XV AND XVI) 27REFERENCES 28TABLESFIGURESAppendix A -General Permit for Discharges Associated with Industrial ActivitiesAppendix B -Permit Registration DocumentsAppendix C -SWPPP Amendment FormAppendix D -Training LogAppendix E -Industrial Facility Iuspection and Visual Observation FormAppendix F -Sample Collection and Handling and Example Chain of Custody FormAppendix G -Annual ReportsI11 LIST OF TABLESTable No. TitleI Pollution Prevention TeamII Industrial Materials Handled at the FacilityIII Best Management Practices SummaryIV Numeric Action Level ValuesV Summary Table for DCPP Ocean Plan Storm Water Monitoring ComplianceLIST OF FIGURESFigure No. Title1 Site Plan2 Site Storm Water Drainage System3 Site Storm Water Sampling Locationsiv ACRONYMS AND ABBREVIATIONSBMPCFRCOGCWAELAPERAHMBPGeneral Permitmg/LNALNECNOINOTNPDESNSWDPG&EPPTPRDsQISPQSERQWCBSICSMARTSSPCCSWPPPSWRCBSWROWDIDWHATuG/LUSTBest Management PracticeCode of Federal RegulationsChain of CustodyClean Water ActEnvironmental Laboratory Accreditation ProgramExceedance Response ActionHazardous Materials Business PlanIndustrial Storm Water Permit for Discharges Associated with IndustrialActivityMilligrams per literNumeric Action LevelNo Exposure CertificationNotice of IntentNotice of TerminationNational Pollutant Discharge Elimination SystemNon-Storm Water Dischargepacific Gas and Electric CompanyPollution Prevention TeamPermit Registration DocumentsQualified Industrial Storm Water PractitionerQualifying Storm EventRegional Water Quality Control BoardStandard Industrial ClassificationStorm Water Multi-Application and Tracking SystemSpill Prevention Control and CountermeasureStorm Water Pollution Prevention PlanState Water Resources Control BoardSea Water Reverse OsmosisWaste Discharge IdentificationWaste Holding and Treatment FacilityMicrograms per literUnderground Storage TankV STORM WATER POLLUTION PREVENTION PLAN SIGNATURE AND CERTIFICATIONI am duly authorized to sign reports required by the California State Water Resources Control BoardIndustrial Storm Water Permit for Discharges Associated with industrial Activity. I certify underpenalty of law that this document and all attachments were prepared under my direction or supervisionin accordance with a system designed to ensure that qualified personnel gather and evaluate theinformation submitted. Based on my inquiry of the person or persons who manage the system, or thosepersons directly responsible for gathering the information, the information submitted is, to the best ofmy knowledge and belief, true, accurate, and complete. I am aware that there are significant penaltiesfor submitting false information, including the possibility of fine and imprisonment for knowingviolations.DateKenneth Cortese -Manager, Chemistry and Environmental Operationsvi 1. INTRODUCTIONThis industrial storm water pollution prevention plan (SWPPP) for Pacific Gas and Electric Company' s(PG&E) Diablo Canyon Power Plant (Facility) was prepared in accordance with the requirements ofthe California State Water Resources Control Board (SWRCB) Industrial Storm Water Permit forDischarges Associated with Industrial Activity ("General Permit," Order NPDES No. CAS000001). Acopy of the General Permit (Order No. 2014-0057-DWQ) dated April 1, 2014, is attached as AppendixA. This updated SWPPP supersedes the Industrial General Permit SWPPP associated with Order 97-03-DWQ.This SWPPP will be modified whenever there is a relevant change in operation, maintenance orconstruction at the facility which may affect the discharge of pollutants to surface water. It will also beamended if it is found ineffective in achieving the objectives listed in the General Permit.1.1 Background and RequirementsThe Federal Clean Water Act (CWA) prohibits discharges from point sources to waters of the UnitedStates, unless the discharges are in compliance with a National Pollutant Discharge Elimination System(NPDES) permit. In 1987, the CWA was amended to establish a framework for regulating municipalstorm water discharges and discharges associated with industrial activity under the NDPES program.Industrial storm water discharges, are regulated pursuant to CWA section 402(p)(3)(A). This provisionrequires NPDES permits for industrial storm water discharges to comply with technology-basedeffluent limitations and water quality-based limitations, as well as implement best managementpractices (BMPs).On April 17, 1997, the SWRCB issued NPDES General Permit for Industrial Storm Water Discharges,Excluding Construction Activities, Water Quality Order 97-03-DWQ. The current General Permit,Order 2014-0057-DWQ, supersedes the previous permit, and serves as the statewide general permit forindustrial storm water discharges. The General Permit requires dischargers to:* Eliminate unauthorized non-storm water discharges (NSWDs);* Develop and implement SWPPPs that include BMPs;* Implement minimum BMPs, and advanced BMPs as necessary, to achieve compliance with theeffluent and receiving water limitations of this General Permit;* Conduct monitoring, including visual observations and analytical storm water monitoring forindicator parameters;* Compare monitoring results for monitored parameters to applicable numeric action levels(NALs) derived from the U.S. EPA 2008 Multi-Sector General Permit for Storm WaterDischarges Associated with Industrial Activity (2008 MSGP), and other industrial storm waterdischarge monitoring data collected in California;* Perform the appropriate Exceedance Response Actions (ERAs) when there are exceedances ofthe NALs; and* Certify and submit all permit-related compliance documents via the Storm Water MultipleApplication and Report Tracking System (SMARTS). Dischargers shall certify and submitthese documents which include, but are not limited to, Permit Registration Documents (PRDs)including Notices of Intent (NOIs), No Exposure Certifications (NECs), and SWPPPs, as well1 as Annual Reports, Notices of Termination (NOTs), Level 1 ERA Reports, and Level 2 ERATechnical Reports.1.2 SWPPP Performance StandardsThis SWPPP identifies and evaluates all sources of pollutants from the Facility that may affect thequality of industrial storm water discharges and authorized NSWDs. Additionally, this SWPPPidentifies and describes the minimum BMPs and any advanced BMPs implemented to reduce or preventpollutants in industrial storm water discharges and authorized NSWDs. BMPs will be selected tofacilitate compliance with the objectives of the General Permit and will identify and describe conditionsor circumstances which may require future revisions to be made to the SWPPP. A copy of the currentSWPPP shall be maintained at the Facility.1.3 SWPPP Implementation and RevisionsPG&E Diablo Canyon shall implement this SWPPP effective July 01, 2015. The SWPPP shall berevised whenever necessary and will be certified and submitted electronically to the SWRCB viaSMARTS within 30 days whenever the SWPPP contains significant revisions. Minor. revisions are notrequired to be entered into SMARTS more than once every three months within a given reporting year.1.4 General Facility InformationFacility Name: Diablo Canyon Power Plant (DCPP)Facility Address: 9 miles NW of Avila Beach, Avila Beach, CA 93424Telephone Number: (805) 545-4888Standard Industrial Classification (SIC) Code: 4911 (Electric Power Generating Facility)Waste Discharge Identification (WDID) Number: 340108248Scheduled Facility Operating Hours: 24 hour2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />s/7 daysSize of Facility: Industrial Facility Zone Approximately 585 AcresThe Facility is located on a remote ocean cove approximately 9 miles west northwest of Avila Beach,San Luis Obispo, County, California (Figure 1). The industrial operating portion of the site areawhere the Facility is located is approximately 585 acres, and is currently owned by PG&E. TheFacility is a two unit pressurized water reactor power generating facility with a combined output ofapproximately .2,300 megawatts. The Facility includes the following major buildings, facilities,structures and areas:* Turbine Building* Containment Building(s)* Auxiliary/Fuel Handling Building* Rad Waste Facility* Administration Building* Cold Machine Shop2 a Intake Structure* Training Building* Maintenance Shop Building* NPG Main Warehouse* Turbine Generator Equipment Storage* Hazardous Waste Storage Unit* Fabrication Shop* Blast /Paint Application Facility* Security Training Shooting Range* Sea Water Reverse Osmosis Facility* Makeup Water Facility* Vehicle Maintenance Shop* Building 113* Old Steam Generator Storage FacilityPercent Impervious: Approximately 25 % of 585 AcresFacility Contact:Name: Trevor RebelTitle: Senior Environmental CoordinatorCompany: Pacific Gas and Electric CompanyPhone: (805) 545-3607Email: tdr5@pge.comStreet Address: P.O. Box 56City: Avila BeachState: CAZip Code: 934241.5 Pollution Prevention TeamA Pollution Prevention Team (PPT) responsible for assisting with the implementation of this SWPPPand for conducting all monitoring required under the General Permit has been identified. The specificindividuals (and job titles) that are responsible for developing, implementing, revising this SWPPP, andconducting compliance monitoring are identified in Table I.3 Table I Pollution Prevention TeamName of Person Title/Position Responsibilities, Duties, and ActivitiesSupervise SWPPP development andimplementation; provide support andPG&EUtilty Wter training to the EnvironmentalPG&EUtilty Wter Coordinator and Plant Staff; reviewJeremy Laurin Quality Subject Matter douetupaedoSMR ;Expert Interface with the Regional and/or StateWater Quality Control Boards when______________________necessary as related to storm water.Facility lead for storm water permitcompliance, monitoring; and reporting;conduct employee training; superviseand/or conduct inspections and sampling,Trevor Rebel DCPPo nvroin mental record and report maintenance; recordCoordnatorand report spills and leaks; filedocuments in SMARTS; BMPimplementation; emergency responsecoordination; spill cleanup coordination.DCPP Manager Designated Legally Responsible PersonKnehCreeCEmvisometand (LRP); responsible for certification ofEnvionmetaldocuments within SMARTS_______________________OperationsStevn PngileySenior Scientist Tenera Secondary contact for storm waterStve PngllyInc. Environmental inspections and sampling.Research AssistantTessa Lange Tenera Inc. Secondary contact for storm waterEnvironmental inspections and sampling.Bryn unnngamDCPP Environmental Provide management oversight andBryn unnngamOperations Supervisor support including LRP designee.In the event that the Environmental Coordinator or other positions responsible for SWPPPimplementation are temporarily unavailable to conduct storm water activities due to vacation, illness,out of town business, or other absences, secondary personnel will implement the SWPPP and conductrequired monitoring. PG&E will train, as applicable, all backup personnel so they are familiar withstorm water requirements.PG&E will ensure that this SWPPP is implemented and revised as necessary to be consistent withapplicable municipal, state, and federal requirements that pertain to the requirements in the GeneralPermit.4 2. SITE LAYOUT AND EXISTING FACILITY PLANS (PERMIT SECTION X.E)PG&E has prepared figures illustrating the information required by the General Permit. These include:Figure 1, Site Plan; Figure 2, Site Storm Water Drainage System; Figure 3 Storm Water SamplingLocations. The maps present the following information where applicable:* Site location;* North arrow;* Facility boundary;* Drainage areas;* Portions of any drainage area impacted by discharges from surrounding areas;* Direction of flow within each drainage area;* On-Facility surface water bodies;* Areas of soil erosion;* Nearby water bodies (e.g., rivers, lakes, wetlands);* Municipal storm drain inlets;* Location of storm water collection and conveyance systems;* Points of discharge;* Sampling locations;* Structural control measures;N Impervious areas;* Locations of directly exposed materials;* Locations of significant spills and leaks;* Areas of industrial activity;* Industrial storage areas/storage tanks;* Shipping and receiving areas;* Fueling areas;* Vehicle and equipment storage/maintenance areas;* Material handling/processing areas;* Waste treatment and disposal areas;* Dust or particulate generating areas;* Cleaning and material reuse areas; and* Other areas of industrial activity.5 Facility details are shown on Figure 2, Site Storm Water Drainage System. All runoff from the site iscollected in gravity-driven culverts and inlets, and discharged either to Diablo Creek or the PacificOcean.Two retention basins serve to settle and infiltrate storm water for minor to moderate storm events priorto any possible discharge. Minor to moderate events will not result in a discharge from the followingdescribed paths; Storm water path 012 collects water from Diablo Creek Road, Tni-Bar Flats, and theNorthern section of the 500 kV switchyard. If the retention basin fills to capacity, storm water path 012discharges to Diablo Creek. Storm water path 004 retention basin collects water from approximately25 % of the plant power block areas, and the Area 10 industrial facilities. If the retention basin fills tocapacity, storm water path 004 discharges to the Pacific Ocean at the Diablo Canyon Intake Covefollowing commingling with other non-storm water discharges.6 3. LIST OF INDUSTRIAL MATERIALS (PERMIT SECTION X.F)3.1 List of Industrial Materials Handled at the FacilityThe following table lists significant industrial materials handled at the Facility, the locations where thematerials are stored, received, shipped, handled, and the typical quantities and handling frequency.The DCPP Environmental Emergency Plan contains pertinent information for all hazardous materialsstored at DCPP, including specific storage locations and quantities.Additionally, DCPP maintains a Spill Prevention Control and Countermeasure Plan (SPCC) inaccordance with 40 CFR parts 112 and 761.Table II Bulk Industrial Materials/Chemicals Handled at the FacilityRecevingShipingTypicalMaterial Reevng/SHipping How Storage Quantifitesan HnligStored Location (~Frequency (Gallons)____Aboveground Itk tutr ,0Sodium Bromide Monthly Tank Itk tutr ,0Sodium Bisulfite Quarterly Aboveground Adjacent Turbine 6,0__________ Tanks Building6,0Adjacent Turbine#2 DeselFue-OilBimothl USTAST Bld, Fleet#2 iesl FelOilBimntly ST/ST Fueling, Marine 102,250FuelingEthaolaineMonhlyAboveground Inside TurbineEtaoamn onhyTanks Buttress Building 4,000Gasoline Monthly Aboveground Fleet & Marine2,5________________Tanks Refueling Stations 2,5Hydraine onthl Porable anks Inside Turbine60Hydraine onthl Porable anks Buttress Building 60Sodium Hydroxide Weekly Aboveground Inside Turbine. 7,0Tank Buttress Building 7,0SufrcAi ekyAboveground Inside Turbine7,0Sufrc cdWekyTank Buttress Building 7,0Sodium Hypochlorite Weekly Aboveground Intake Structure .9,500TanksLurcain i AnalyAboveground Multiple Power 14,6LurctinOlAnulYTanks Block Locations 14,6Mineral Oil (Electrical Operating Mlil oeEquipment) Annually Electric Multple2oweTransformers Block Locations 21,97 4. DESCRIPTION OF POTENTIAL POLLUTANT SOURCES (PERMIT SECTION X.G)4.1 Industrial ProcessesPG&E's Diablo Canyon Power Plant (DCPP) is a pressurized water reactor nuclear steam electricgenerating station. The primary industrial process is electrical power generation. Secondary industrialprocesses include the use of ancillary support machinery and equipment. The materials and areas ofusage are described below.4.2 Material Receiving, Shipping and HandlingTrash and recyclable materials are accumulated in dumpsters and/or roll-off containers locatedthroughout the Facility. Dumpsters have integral lids which are closed when the dumpsters are notbeing actively used. Metals and wood for recycling are accumulated in roll-off bins located east of thepower block in a laydown area.All hazardous wastes generated by the Facility are protected (no exposure) from storm water. TheCentral Hazardous Waste Management Area (CHWMA) processes and stores industrial processgenerated hazardous waste (solids and liquids) inside of a secure (locked) warehouse.ReceivingThe Facility receives regular deliveries Of the liquid industrial chemicals and materials listed in TableII. The materials stored in larger tanks are delivered by vendor service trucks and are directly loadedinto the respective storage vessels. Receiving and loading of materials is performed directly adjacent tostorage areas. Other materials include those listed in volume 2 of the DCPP Environmental EmergencyPlan used in miscellaneous equipment and machines. None of these materials are directly exposed tostorm water.ShippingShipping materials, oils, and wastes at the Facility occurs within the waste storage area indicated onFigure 2. Shipping generally occurs Monday through Friday from 0800 to 1700, during normalbusiness hours.Material HandlingMaterials and wastes are moved using service vehicles. Hazardous waste is picked up and shippedoffsite for processing by a waste disposal vendor (PSC Industrial Services) during normal businesshours.4.3 Dust and Particle Generating ActivitiesThe Facility operates an outdoor shooting range. All range activities direct rounds into engineeredbullet trap enclosures. Both structural and non-structural BMP are used to control potential particulaterelease.The Facility infrequently utilizes an outdoor abrasive blast yard. All blast material is captured andcontained during abrasive blasting operations. All blast materials are cleaned up and disposed of insealed containers after each blasting activity.8 4.4 Significant Spills and LeaksThere have been two significant spills or leaks at the Facility in its operating history.In 1995, a transformer failure released 3,400 gallons of mineral oil to the Unit 1 transformer yard. Anunknown quantity of oil reached Diablo Creek and the Pacific Ocean. The oil spill was cleaned upand/or dissipated.In 2008 a transformer failure and fire released mineral oil to the Unit 2 transformer yard. A majorityof the oil was consumed in the fire. No oil reached a discharge point from the facility. Somebiodegradable fire fighting foam used during the fire response reached Waters of the State at the DiabloCanyon Intake Cove.Significant spills and leaks include any toxic chemicals identified in 40 Code of Federal Regulations(CFR) Section 302 that are discharged into the Facility's storm water conveyance system as reportedon U.S. EPA Form R, as well as spills or leaks of oil and hazardous substances in excess of reportablequantities (40 CFR §§ 110, 117, and 302). PG&E contracts with PSC Industrial Services to respond toany significant spills of fuels, oil or other materials. During routine monthly inspections, PG&Eevaluates the areas where spills and leaks could potentially occur during material delivery., unloading,loading, transport, storage/containment, or use.In accordance with the Facility SPCC Plan and the General Permit, in the event that significant spillsor leaks occur in the future,- for each potential discharge PG&E will record and document the followinginformation: the location, characteristics, and approximate quantity of the materials spilled or leaked;approximate quantity of the materials discharged from the Facility's storm water conveyance system;the cleanup or remedial actions that have occurred or are planned; the approximate remaining quantityof materials that have the potential to be discharged; and the preventive measures taken to ensure spillsor leaks of the material do not reoccur.4.5 Non-Storm Water DischargesA NSWD is any water discharged through a dedicated or shared storm water conveyance system at theFacility which is not the direct result of a rain event. Examples include process water, cooling water,and wash water. When non-storm water enters a storm water collection system, it may introducepollutants into the system. Per the requirements of the General Permit, these NSWDs are consideredillicit discharges and must be eliminated. Certain limited categories of NSWDs are considered to beauthorized (as long as they are not in violation of any Region Basin Plan, municipal agency ordinance,or other statewide water quality control plans or policy requirements), including:* Fire hydrant flushing;* Potable water sources;* Drinking fountain water;* Refrigeration, air conditioning, dehumidifier, continuous emissions monitoring system, orcompressor condensate;* Irrigation drainage and landscape watering, provided that all pesticides, herbicides andfertilizer have been applied in accordance with manufacturers' recommendations;9
- Uncontaminated natural springs, groundwater, and foundation/footing drainage;* Seawater infiltration where seawaters are discharged back into the sea; and* Incidental windblown mist from cooling towers.The NSWDs listed above are authorized by the General Permit if all of the following conditions aremet:* The NSWDs are in compliance with Regional Water Quality Control Board (RWQCB)requirements.* The NSWDs are in compliance with local agency ordinances and/or requirements.* BMPs are specifically included in the SWPPP to (1) prevent or reduce the contact of NSWDswith significant materials or equipment and (2) minimize, to the extent practicable, the flow orvolume of NSWDs.* The NSWDs do not contain significant quantities of pollutants.* The monitoring program includes quarterly visual observations of each NSWD and its sourcesto ensure that BMPs are being implemented and are effective.* The NSWDs are reported and described annually as part of the Annual Report.As part of the routine monthly site inspections, trained personnel will conduct an evaluation of theFacility to identify any NSWDs, sources, and drainage areas. The inspection will include anevaluation of all storm drain inlets to identify connections to the storm water conveyance system; and adescription of any NSWDs that have occurred and how they have been eliminated. In the event thatNSWDs are discovered,they will be described on the inspection form located in Appendix E of theSWPPP. This description will include the source, quantity, frequency, and characteristics of theNSWDs, associated drainage area, and whether it is an authorized or unauthorized NSWD.NPDES Permit Number CA00375 1, Order 90-09 allows for the discharge of stored water from powerblock discharge points 004, 005, 008, 009.4.6 Erodible SurfacesThe Facility experiences some erosion due to extensive ground squirrel/wildlife activity in native soilsand road cut toe slopes. Eroded material is controlled with non-structural BMP to include: removingeroded material with sweeping and/or vacuuming, installing waddles or check dams as appropriate.Erosion generally does not occur due to industrial activities.Approximately 25 % of the Facility is developed and/or impermeable. Larger unpaved portions of thein use industrial site include Parking Lot 1 and the Old Steam Generator Storage Facility laydown area.Both of these locations have minimal slope, and are not subject to erosion. The remaining unpavedareas of the Facility are covered with varying densities of natural coastal vegetation.10 5. ASSESSMENT OF POTENTIAL POLLUTANT SOURCES (PERMIT SECTION X.G.2)5.1 Narrative Assessment of Likely Pollutants Present in Storm Water DischargesPlant staff conduct frequent preventive maintenance and inspection to ensure power block andsupporting structure plant machinery, equipment and storage vessels are in good working order. Themost likely potential pollutants in storm water discharges are the materials listed in Table II.Approximately 19 storm water paths drain the industrial site, and are located throughout the Facility.PG&E has implemented BMPs, section 6, to control the offsite migration of potential pollutants.5.2 Identification of Additional BMPsThe storm water retention basins at storm water paths 004 and 012 are advanced BMPs at the Facilityconstructed by PG&E. PG&E will consider identifying additional BMPs to address any significantchanges to the Facility that may affect storm water discharges, or if any monitoring results indicatesignificant increases in concentrations of constituents of concern.5.3 Identification of Drainage Areas with No ExposureThree drainage discharge areas within the Facility meet the requirements of zero industrial exposure.All three drainages drain only coastal slope areas. Those areas are identified on the Site Storm WaterDrainage System, Figure 2, as paths 007, 024 and 025.5.4 Identification of Additional ParametersIn addition to the standard parameters required for all industrial facilities (pH, oil and grease, and totalsuspended solids), PG&E will continue to analyze for iron, as per the SIC code 4911 requirements ofTable 1 and Attachment A of the General Permit.11 6. STORM WATER BEST MANAGEMENT PRACTICES (PERMIT SECTION X.H)6.1 Minimum BMPs (Permit Section X.H. 1)6.1.1 Good Housekeeping* Monthly Visual Inspections. Once per calendar month, personel inspect all outdoorareas associated with industrial activity, including storm water discharge locations,drainage areas, conveyance systems, waste handling/disposal areas, vehicle rinse areas,and perimeter areas impacted by off-Facility materials or storm water run-on todetermine housekeeping needs. Any identified debris, waste, spills, tracked materials,or leaked materials identified during the inspections are cleaned and disposed ofproperly.* Tracking Control. There is a low potential for tracking of sediment at the Facility. Iftracking is discovered during routine inspection, then sediments are removed andassociated area cleaned as practicable.* Sweeping. Comprehensive site street sweeping is performed on a semi-annual basis forall accessible paved areas. Note: Some site areas are not accessible due to nuclearsecurity infrastructure, barriers, and limits to access. Additional concentrated streetsweeping is performed as needed based on monthly site inspections.* Dust Control. The power generation process does not generate dust; however., dust* suppression is implemented during excavation activities or minor construction.* Industrial Materials Storage Control. The Facility appropriately stores all materialsand performs all activities that involve hazardous materials under' roofed areas*(buildings or storage containers) to the maximum extent practicable, within secondarycontainment, or during dry weather, if possible.* Control of Non-Solid Industrial Materials/Wastes. The Facility contains all stored non-solid industrial materials or wastes (e.g., waste oil) that can be transported or dispersedby wind or contact with storm water. Spill kits are maintained and allow for immediateresponse to spills. These materials are also stored indoors or within secondarycontainment to prevent any spilled or leaked material from being transported by stormwater.* Control of Rinse/Wash Water Disposal. No wash water impacts the sites storm waterconveyance system. Rinse water from vehicle rinsing is directed to the 004 pathwayretention basin. Soaps are not~used. Rinse areas and the 004 retention basin areinspected monthly.* Spill Response. The Facility prevents the disposal of any industrial materials into thestorm water conveyance system by responding immediately to any spills andmaintaining spill kits in good order. See additional information in section 6.1.3.* Minimize Storm Water Discharges from Non-Industrial Areas. Non-industrial areasexist within the facility. The non-industrial areas (coastal slopes, employee parkingareas, etc.) are observed and inspected to ensure there is no impact on industrial stormwater discharges.12 6.1.2 Preventative Maintenance* The Facility implements the following preventative maintenance measures:* PG&E has identified the following outdoor equipment at the Facility which may spill orleak pollutants, as follows:-Containment areas, tanks and containers storing hazardous materials or wastes;-Oil-filled electrical equipment and oil-filled operating equipment; and-Service vehicles (pickup trucks, forklifts, and scissor lifts) used to load ortransport materials such as fuels or drums of waste oil* Monthly observations of containment areas, tanks, equipment and systems areconducted to detect leaks, or identify conditions that may result in the development ofleaks.* The Facility maintains a schedule for conducting routine maintenance of identifiedequipment and systems. There is daily inspection of service vehicles, and periodicservicing. Services vehicles are maintained at the Facility in a covered garage.* The Facility has defined procedures for prompt maintenance and repair of equipment,and maintenance of systems when conditions exist that may result in the developmentof spills or leaks.6.1.3 Spill and Leak Prevention and ResponsePG&E has established the following protocols to respond to spills and leaks:* The Facility has developed procedures to minimize spills and leaks. The Facility hasan SPCC Plan and a HMBP that address storage of materials and wastes.* The Facility has established spill and leak response procedures to prevent industrialmaterials from discharging through the storm water conveyance system. Spilled orleaked industrial materials are cleaned up promptly and disposed of properly.* The Facility has identified and described all necessary and appropriate spill and leakresponse equipment, locations of spill and leak response equipment, and spill/leakresponse equipment maintenance procedures in the Facility's SPCC plan and/orHMBP. Spill kits are maintained throughout the Facility.* The Facility maintains a full time Fire Department and emergency response team torespond to any leaks or spills. Designated personnel are trained in hazardous materialscleanup (HAZWOPER). Spill and leak response personnel are trained annually, at aminimum. PG&E maintains a contract vendor (PSC Industrial Services) to respondand assist with any significant spill cleanup activities.13 6.1.4 Material Handling and Waste ManagementPG&E has a robust program for addressing material handling and waste management, asfollows:* The Facility minimizes the handling of industrial materials or wastes that can be readilymobilized by contact with storm water during storm events.* The Facility appropriately contains stored non-solid industrial materials or wastes (e.g.,lubricant oil) that can be transported or dispersed by the wind or contact with stormwater by storing these materials within equipment housings, in tanks surrounded bysecondary containment, or in drums equipped with water-tight lids and/or staged insideenclosed secondary containers.* Industrial waste disposal containers (waste/recycling roll-off and metal waste recyclingbins) and industrial material storage containers are covered with lids or tarps to theextent practicable during inclement weather. Note: Predicted or potential high windconditions may require tarp or lid removal to protect the safety and integrity of siteenergized high voltage transmission lines and system.* Site run-on and storm water generated from within the Facility is diverted away frommaterial storage areas.* Spills of industrial materials or wastes that occur during handling are cleaned up inaccordance with the site spill response requirements and Facility procedure CP M-9A.Outdoor material or waste handling equipment or containers that can be contaminatedby contact with industrial materials or wastes are inspected and cleaned, as appropriate.6.1.5 Erosion and Sediment ControlsThe Facility experiences some erosion due to ground squirrel/wildlife activity and road cut toeslopes. Eroded material is controlled with non-structural BMP to include: removing erodedmaterial with sweeping and/or vacuuming, waddles, and check dams where appropriate.Erosion does not occur due to any industrial activities.14 6.1.6 Employee Training ProgramPersonnel responsible for implementing the storm water program at the Facility will receiveannual storm water training. The Facility has identified which personnel require training(Section 1.5), their responsibilities, and the type of training they will receive, and will prepareor acquire appropriate training materials and establish a schedule for providing the training.All participants will sign a Training Log that will be kept on file with the Facility's storm watercompliance records. An example of this log is included in Appendix D. This documentationwill be maintained with the SWPPP. At a minimum, training will cover the following topics:* BMP implementation;* BMP effectiveness evaluations;* Visual observations; and* Monitoring activities.In the event the Facility enters Level 1 status (Section 9), appropriate team members will betrained by a Qualified Industrial SWPPP Practitioner (QISP). A QISP must complete aSWRCB-approved training course and assist in the preparation of ERAs for Level 1 and 2status designations which are described in further detail in Section 9.6.1.7 Quality Assurance and Record-KeepingFacility staff has done, and will continue to perform, the following to retain proper qualityassurance and record-keeping:* Staff has developed and implemented management procedures to ensure thatappropriate staff implements all elements of the SWPPP, including the MonitoringImplementation Plan.* The Facility has developed a method of tracking and recording the implementation ofBMPs identified in the SWPPP, through the monthly inspection process.* The Facility will maintain the BMP implementation records, training records andrecords related to any spills and clean-up related response activities for a minimum offive years.6.2 Advanced BMPs (Permit Section X.H.2)In addition to the minimum BMPs described in Section X.H. 1 of the General Permit, the Facility will,to the extent feasible and/or practicable, implement and maintain any advanced BMPs necessary toreduce or prevent discharges of pollutants in storm water discharge in a manner that reflects bestindustry practice considering technological availability and economic practicability and achievability6.2.1 Exposure Minmiation BMPsThe Facility has installed engineered bullet trap structures designed to retain and capture spentammunition from the PG&E Diablo Canyon shooting range. The trap structures areperiodically mined and the spent ammnnition is sent to a certified recycling facility.15 6.2.2 Storm Water Containment and Discharge Reduction BMPsThe Facility maintains two storm water retention basins for storing and infiltrating storm water,specifically paths 004 and 012. The retention basins only discharge when filled to capacity. Thebasins are inspected on a monthly basis.6.2.3 Treatment Control BMPsStorm water from the outdoor firing range employs sediment trapping to reduce any particulatematerial associated with range activities.6.2.4 Other Advanced BMPsIn the event that conditions change or monitoring results indicate an exceedance of one or morenumeric action levels (NAL) listed in Table IV (Section 9), the Facility will consider additionaladvanced BMPs to address the changed conditions or constituents of concern.7. TEMPORARY SUSPENSION OF ACTIVITIES (PERMIT SECTION X.HI.3)PG&E's Diablo Canyon Power Plant operates 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> a day, 7 days a week. The Facility does nothave any plans to suspend industrial activities for ten or more consecutive calendar days in any givenyear. Therefore, this section of the General Permit is not applicable.16 BMP SUMMARY (PERMIT SECTIONS X.H.4 AND X.H.5)The following table summarizes each identified area of industrial activity, the associated industrialpollutant sources, the industrial pollutants, and the BMPs implemented. The PPT identified in Section1.5 is responsible for implementing all BMPs at the site. Some of the BMPs described below requirethe use of mechanical equipment, such as forklifts; in order to perform maintenance activities on theBMPs. PPT members are authorized to use the required equipment or to obtain the help of otherFacility staff to maintain the BMPs onsite. The Facility's mechanics are responsible for maintaining themechanical equipment throughout the Facility.To retain effectiveness during and after significant weather conditions, certain BMPs must be inspectedmore frequently than monthly. These BMPs will be informally inspected by PPT members duringlarge rain events or following rain events, as applicable.Table ml BMP SummaryPotential Frequency ofArea of Industrial Associated Industrial inutilBMPsBMActivity Pollutant Sources Pol~sImplemented IpeettoPetroleum Active OWSTurbine HydocabonStoage Hydrocarbons At all timesBuildingffoadSump Diversion toCheicl OfladProcess Chemicals (WHAT) FacilityHydrazine SilKtSulfuric Acid S~lKtTurin Butrss Cheicl OfladSodium Hydroxide SecondaryTurin Butrss Cheicl ffladEtanoamneContainmefit, At all timesEthanoamineFloor DrainsSSodium Bisulfite adupResin adup*, Engineered andTrnsformer Yards Eqimn2alr Petroleum Graded basin flowsTrnsorerYads Eqipen FilreHydrocarbons to passive OWS with At all times17,000 gal capacitySodium Hypochlorite Secondary andIntake Facility Outdoor Tanks (Bleach) Tertiary Daily InspectionContainment, WaterSodium Bromide Test Prior to Release__________Hazardous Waste Site Generated Engineered Integral Daily and WeeklyFacility Potential Spills Hazardous Waste Containment InspectionsFabrication Shop Fabrication Metals, Paint, Oils Indoor Activity At all timesHigh Level Alarm,Sewage Treatment Waste Water Treatment Sewage Potential Overflow At all times_________________to Retention BasinIndoor Storage,SWRO desalinization Process Chemicals Secondary At all timesContainmentMakep Waer'Indoor Storage,Facili Wty r' Water distribution Process Chemicals Secondary At all timesFacilityContainmentWHAT Facility(Industrial Waste EupetFirePotentially Oily Waste Engineered Facility A l ieWater Storage and Water with ContainmentTreatment)______________ ____________17 OilsIndoor Activity,Vehicle Maintenance Spills Solvents, HospilleKit g At all timesMetalsSplKiSpill Kit,FletVeice uein Ptetil uein Sils Gasoline, SecondaryFleDVhceeulng PtntaeueigSplsContainment, At all timesDieselRetention Basin with38,000 gal capacityMain Rfulng Poenia uein Sils Gasoline, Spill Kit,MrnReuln PoetaFulnSpls Diesel Secondary At all timesContainmentEngineered BulletShooting Range Shooting Range Metals, Sediment Traps, Sediment At all timesBoxes, FiltrationPaved and Graded50kSwtyrd Oil Filled Operating Petroleum Collection System, At all times50kSwthad Electrical Equipment Hydrocarbons Passive OWS with________________ __________________13,000 gal capacityPaved and Graded230 kV Switchyard Oil Filled Operating Petroleum Collection System, At all timesElectrical Equipment Hydirocarbons Passive OWS with17,000 gal capacityRemote 12 kV Oil Filled Operating PetroleumTransformers Electrical Equipment Hydr~ocarbons Inspection MonthlyWarehouse Material Handling Spills Multiple IndoorlStorage____________and or Incidents Graded and Paved A l iePetroleumArea 10 Rotor Storage Oil Filled Equipment Hydrocarbons Passive OWS At all timesOutdoor Abrasive AbaieBatn ad eaPit Graded and Paved, Ec sBlast Facility AbrasiveBlasting_ Sand, MeaPit Housekeeping .. Ec sTrash and Scrap Trash, Metals Trash, Metals Covered when not in At all timesDumpsters use as practicableInspections,FcltWieSoil and SoilsentSweeping, Check At all timesFacility Widedisruption/deposition SisDmVcuigWaddles18 8. MONITORING IMPLEMENTATION PLAN (PERMIT SECTION X.i)As described above in Section 1.5, Facility staff has assembled a PPT that includes members assignedto conduct storm water monitoring. Analytical monitoring will be conducted at eight sampling locationsshown on Figure 3.Procedures for Monthly Visual ObservationsFacility staff will conduct visual observations within the drainage area at the Facility at least once percalendar month, which will include an evaluation of:* Presence or indications of prior, current, or potential unauthorized NSWDs and their sources;* Authorized NSWDs, sources, and associated BMPs; and* Outdoor industrial equipment and storage areas, outdoor industrial activities areas, BMPs, andall other potential source of industrial pollutantsMonthly visual observations will be conducted during daylight hours without precipitation. Note: TheFacility operates 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> each day. Visual observations will be recorded on the form provided inAppendix E. Information to be recorded will include the date, approximate time, locations observed,presence and probable source of any observed pollutants, name of person(s) that conducted theobservations, and any response actions and/or additional SWPPP revisions necessary in response to thevisual observations. If a monthly visual observation is not conducted, staff will provide an explanationin the Annual Report.Procedures for Sampling Event Visual ObservationsFacility staff will conduct visual observations at the same time sampling occurs at a discharge location.At each discharge location where a sample is obtained, Personnel will observe the discharge of stormwater associated with industrial activity and record these observations on the form provided inAppendix E. The same types of information will be recorded as for the monthly inspections. Thefollowing items will be observed and recorded:* The appearance of storm water discharged from containment sources (e.g., secondarycontainment or sumps) at the time that the discharge is sampled.* The presence or absence of floating and suspended materials, oil and grease, discolorations,turbidity, odors, trash/debris, and source(s) of any discharged pollutants.In the event that a discharge location is not visually observed during a sampling event, personnel willrecord which discharge locations were not observed during sampling or that there was no dischargefrom the discharge location and will provide an explanation in the Annual Report for uncompletedsampling event visual observations, personnel will revise BMPs as necessary if the visual observationsindicate pollutant sources have not been adequately addressed in the SWPPP.19 Representative SamplesIndustrial storm water at the PG&E Diablo Canyon Facility is representatively sampled from eightdischarge locations on the site. Sample point reduction, performed in accordance with XI.C.4 of theGeneral Permit is described.Intake Area Sample ReductionIdentification -Intake areas drain through the following discharge locations: 003, 018, 020, 021, 023.Description of Drainage Locations -Location 003 drains areas surrounding the Intake Structurebuilding and shop areas before comingling with screen wash system seawater prior to discharge.Location 018 drains areas south of the Intake Structure building. Drain 020 drains storm water from alimited area west of the Intake structure deck prior to discharge directly in front of circulating waterpump fore-bays. Drain 021 discharges storm water from a limited area adjacent to the seawatertravelling screen deck. Discharge location 023 drains areas south of the Intake Structure including anequipment laydown area and the chemical offload station.Industrial Activities -Industrial activities associated with Intake area paths include the storage andoffloading of bulk process chemicals (bleach and sodium bromide) that are protected by secondary andtertiary containment. Additional ancillary activities associated with operating large electricallypowered pumping systems and a screen wash system occur at the Intake area.BMP -BMP for the Intake area is inspection and good housekeeping practices.Physical Characteristics- All drainages listed for Intake include storm water culverts and inletsdraining asphalt and concrete surfaces.Sample Point and Rationale -Sample point 023 is the most representative sample for the area as well ascapturing a large surface area of the Intake. Point 003 drains to a comingled storm water and seawaterpipe before discharging overboard. Additionally, location 003 is not accessible due to heightenedsecurity requirements for the location and does not allow safe access during inclement weather. Drain018 has intermittent flow based on drain valve (normally shut) position. The drain valve for 018 is onlyopened as necessary to remove accumulated storm water. Location 020 drains to a location directly infront of circulating water pump fore-bays and is substantially identical in character 1o point 023. Drain021 only drains a limited area storm water near the intake travelling screens, and is not representativeof the industrial activities for Intake. Drainage location 023 adequately represents the overall industrialprocesses associated with Intake activities.Drainage Locations South end of FacilityIdentification -Drainage points in the southern portion of the Facility include 007, 024, 025A, 025BDescription of Drainage Locations -Zero industrial activity occurs within the listed drain paths.Industrial Activities -Zero industrial activity occurs with listed drainages and are therefore, notsampled.BMP -Inspection only.20 Physical Characteristics -Coastal range land drainage only via natural slopes to concrete inlets.Sample Point and Rationale -Adjacent discharge location 006 is sampled to adequately representindustrial activities.Drainage Locations North end of FacilityIdentifications -Drainage points at North end of Facility include 008 and 009.Description of Drainage Locations -Location 008 drains areas adjacent to the Turbine Building,Turbine Buttress Building, and an indoor maintenance shop. Drainage location 009 drains the UnitTransformer Yard and adjacent Turbine Building areas.IndustrialActivities -Industrial activities in these areas include chemical tank storage and oil filledoperating electrical transformers.BMP -BMP for these areas include inspection, housekeeping, secondary containment for chemicalstorage and an oily water separator system for the transformer yard.Physical Characteristics -All drainages listed for 008 and 009 are paved surfaces.Sample Point and Rationale -Sample point 009 is the most representative sample for the area. Samplepoint 008 is not readily accessible due to enhanced security measures. Additionally, sample points 004and 005 have identical (mirror image) industrial activity and are sampled as part of the MIP.Drainage Locations East of FacilityIdentilfcations -Drainage points at East of the Facility include 010, 011, 012, 013, 014, 015.Description of Drainage Locations -Drainage 010 drains areas adjacent to the makeup waterdemineralization Facility, 011 primarily drains natural coastal slopes and a road, 012 drains theoverflow outlet of an engineered storm water retention basin, 013 drains areas adjacent to an industrialWaste Water Treatment Facility (WHAT) and a large laydown area, 014 drains a laydown yard and theabrasive blast facility, 015 drains areas adjacent to the vehicle maintenance and equipment staging area.Industrial Activities -Industrial activities in these areas include electrical transmission, water treatment,laydown and storage, vehicle maintenance, intermittent abrasive blast.BMP -BMP for these areas include inspection, housekeeping, secondary containment, storm waterretention basin, switchyard retention basins.Physical Characteristics -All drainages listed for this area drain asphalt or graded soil areas. All listeddrainages flow to Diablo Creek.Sample Point and Rationale -Sample points 013, 014, 015 adequately capture the industrial activitieswithin the overall area. Path 010 is a minor discharge path that flows to adjacent hillsides. Path 0 11primarily drains native coastal slopes and a road. Path 012 has intermittent flow due to a large stormwater retention basin, and is not safely accessible in wet weather.21 Summary of Sample AreasRepresentative samples of industrial areas are obtained by sampling 8 outfall locations locatedthroughout the Facility. All discharge locations are indicated on Figure 2 (Site Storm Water DrainageSystem) and sampled locations are indicated on Figure 3 '(Site Storm Water Sampling Locations).Sampling and AnalysisSamples will be collected during Qualifying Storm Events (QSE). A QSE is defined as a precipitationevent that produces a discharge for at least one drainage area and is preceded by 48 hours5.555556e-4 days <br />0.0133 hours <br />7.936508e-5 weeks <br />1.8264e-5 months <br /> with nodischarge from any Facility drainage area. Responsible staff will collect and analyze storm watersamples from two QSEs within the first half of each reporting year (July 1 to December 31), and twoQSEs within the second half of each reporting year (January 1 to June 30), as practicable. Theoccurrence of QSEs is dependent on natural conditions and QSEs may not occur in a periods of droughtor prolonged low precipitation conditions. Samples will be collected within four hours of the start ofdischarge at the locations shown on Figure 3.Sampling will be performed in accordance with requirements of the General Permit. Samples will becollected and analyzed for pH, oil and grease, and total suspended solids, as well as iron (based on theFacility's SIC code listed in Table 1 of the General Permit for additional analytical parameters).Sampling results will be compared to two types of NAL values based on the specific parameter todetermine whether either type of NAL has been exceeded for each applicable parameter. Annual NALexceedances are based on analytical results for the entire Facility for the reporting year, whileInstantaneous Maximum NAL exceedances are based on analytical results from each distinct sample.The table below describes test methods, reporting units, and NAL values:Table IV -NAL ValuesParameter Test Method Reporting Annul1 NAL InsaxntaneNALUnitsMaiuNAPortablepH instrument* pH units N/A < 6.0 or > 9.0Oil and Grease EPA 1664A mg/L 15 25Total Suspended Solids SM 2540-D mg/L 100 400Iron EPA 200.7 mg/L 1.0 N/A*The pH screen will be performed as soon as practicable, but no later than 15 minutes after the sample is collected,and will be analyzed using a calibrated portable instrument for pH.All instruments used for pH measurement will be properly calibrated in accordance with themanufacturer's instructions and recommended 'frequency, and copies of the calibration records will bemaintained onsite. Samples for iron, total suspended solids and oil and grease will be analyzed by ananalytical laboratory that is Environmental Laboratory Accreditation Program (ELAP) certified. Allsamples will be collected in accordance with Attachment H of the General Permit ("Sample Collectionand Handling Instructions") and handled under proper chain-of-custody (CCC) protocols. GeneralPermit Attachment H and an example COC are included in Appendix F.22 California Ocean Plan MonitoringOn April 01, 2014 the State Water Board adopted Order 2014-0057-DWQ NPDES General Permit forStorm Water Discharges associated with Industrial Activities. The order requires applicable industrialfacilities to comply with requirements set forth in the California Ocean Plan 2012 (Ocean Plan) forstorm water discharges to ocean receiving waters.DCPP has multiple storm water discharges that may discharge directly to ocean receiving watersduring precipitation events. These facility discharges are indicated on the site storm water samplinglocations map provided (Enclosure 1). The key storm water outfall locations which may directlydischarge to ocean receiving waters include SW04, SW05, SW06, and SW23.For discharge location SW04, minor to moderate precipitation runoff is captured and infiltrated in alarge retention basin located in the drainage pathway prior to outfall. The retention basin will onlyoverflow during significant storm events after filling. Additionally, the outfall conveyanceinfrastructure leading from the basin (basin overflow riser and underground piping) cannot safely beaccessed for sampling when the basin is filled. The basin discharge will also routinely comingle withnon-storm water effluent (NPDES Order 90-09 Discharge 004) prior to final outfall to receivingwaters. The infrequent, nature of discharge from the retention basin, and likely dilution of the basineffluent with other process water prior to outfall, limits the potential for obtaining a representativestorm water sample from this pathway for Ocean Plan compliance monitoring. Therefore, DCPP willutilize discharge points SW05, SW06, and SW23 as the site industrial storm water sampling points forthe Ocean Plan MIP.As set forth in the Ocean Plan, industrial facilities must sample applicable discharges, on an annualbasis, during two qualifying" storm events for the following chemical constituents; Total SuspendedSolids (TSS), Oil and Grease (O&G), Total Organic Carbon (TOC), pH, Biochemical Oxygen Demand(BOD), Temperature, Turbidity, Table 1 Metals, and Polynuclear Aromatic Hydrocarbons (PAF~s).Discharge locations SW05, SW06, and SW23 will be sampled and analyzed for these constituents twiceannually; as achievable dependent on natural patterns of precipitation and associated site storm waterrunoff activity.Core toxicity monitoring is also required for industrial facilities at least once per year for a minimumof 10% of applicable discharges exceeding 36-inches in diameter. Only one site storm water dischargelocation, SW05, meets the infrastructure configuration and/or maximum potential flow definition of adischarge greater than 36-inches in diameter. This discharge will be sampled for chronic toxicitytesting at least once annually; as achievable dependent on natural patterns of precipitation andassociated site storm water runoff activity. However, this location cannot be sampled at the point ofdischarge in the surf zone (where runoff meets ocean water) due to lack of accessibility and significantsafety concerns. Therefore, this sample will be obtained in the discharge pathway inmmediately prior tothe final piping that leads to the point of runoff entry into the surf zone.ICore toxicity monitoring will be conducted for Table 1 critical life stage toxicity using Tier 1invertebrate species selected from the Ocean Plan Table-IIl-i [Approved Tests -Chronic Toxicity(TUc)]. The preferential test species will be Red Abalone (Haliotis rufescens) or Sea Urchin(Strongylocentrotus purpuratus) dependent on availability of the respective chronic toxicity testingprotocols at qualified analytical laboratories during the time period storm water sampling is completed.Additionally, due to the often emergent and imperfect predictability of timing for sampling fromqualified storm events, as well as resource and test preparation limitations of qualified analyticallaboratories, there is potential the general protocol for a 36-hour maximum sample hold time prior tostart of chronic toxicity analysis may be exceeded for this monitoring.23 Sediment monitoring, bioaccumulation monitoring, and receiving water characteristics monitoring, asoutlined in the Ocean Plan for storm water discharges, is only required for applicable Phase 1 MS4permittees, and therefore not applicable to DCPP.Table V -Summary Table for DCPP Ocean Plan Requirements Storm Water MIP Sampling PointsDischarge TS G&O TOC pH BOD Tm. Trity Table 1 Ppils CorePoint TSI___{Tm1Trit1Metals ____ ToxicitySWO5 2X 2X -2X 2X 2X 2X_ 2X 2X 2X 1 XSW06 -.2X -2X -2X 2X 2X 2X_ 2X 2X 2X -_SW23 -2X 2X 2X 2X j2X 2X_ 2X 2X 2X -__Where iX and 2X equal annual sample frequency (sample once annually and twice annually respectively).24 Exceedance Response ActionsERAs are required when an NAL value for any parameter is exceeded. At the beginning of NOIcoverage, PG&E will enter as a Baseline status for all parameters designated in Table IV above. Ifsampling results indicate an NAL exceedance (either annual or instantaneous) for any parameter listedin Table IV, the status will move up to Level 1 for that parameter on July ist following the reportingyear during which the exceedance occurred (i.e. if there was an instantaneous exceedance onSeptember 30, 2015, Level 1 would begin on July 1, 2016). Moving to Level 1 status triggers twoactions: a Level 1 ERA Evaluation and a Level 1 ERA Report, both prepared with assistance of aQISP.* A Level 1 ERA Evaluation, due by October 1 following commencement of Level 1 status,consists of completing an evaluation of the industrial pollutant sources at the Facility that maybe related to the NAL exceedance and evaluate all BMPs to determine if revisions arenecessary to prevent future NAL exceedances.* A Level 1 ERA Report, due by January 1 following commencement of Level 1 stats, isprepared after the Level 1 ERA Evaluation and consists of revising the SWPPP as necessary toimplement any additional BMPs identified in the Evaluation and submitting via SMARTS theLevel 1 ERA Report with details regarding SWPPP revisions and the results of the Evaluation.A Level 1 status for any exceeded parameter will return to Baseline status once the Level 1 ERAReport has been completed, additional BMPs have been implemented, and results from fourconsecutive QSEs indicate no additional NAL exceedances for that parameter.The status for any exceeded parameter will change to Level 2 if sampling results indicate an NALexceedance for that same parameter while in Level 1 (i.e. if Level 1 was implemented on July 1, 2015and an exceedance occurred on December 1, 2015, Level 2 would be triggered on July 1, 2016).Moving to Level 2 status triggers two actions: a Level 2 ERA Action Plan and a Level 2 ERATechnical Report, both prepared with assistance of a QISP.* A Level 2 ERA Action Plan, due by January 1 following the reporting year during which theNAL exceedance occurred, consists of a schedule and description of implementing a particulardemonstration, as described in the Level 2 Technical Report, in response to the NALexceedance.-A Level 2 ERA Technical Report, due by January 1 of the reporting year following thesubmittal of the Level 2 ERA ActionPlan, describes one or more of the demonstrations inresponse to the NAL exceedance: Industrial Activity BMPs Demonstration, Non-IndustrialPollutant Source Demonstration, and/or Natural Background Pollutant Source Demonstration(as described in the General Permit Section XII. D.2).-A Level 2 ERA Technical Report may be prepared and submitted at any time, whether or notthe Facility is required to submit such a report.* A new Level 2 NAL exceedance is any Level 2 NAL exceedance for 1) a new parameter in anydrainage area, or 2) the same parameter that is being addressed in an existing Level 2 ERAAction Plan in a different drainage area.* NAL exceedances, in and of themselves, are not violations of the General Permit. Failure tocomply with the Level 1 status and/or Level 2 status ERA requirements is a violation of theGeneral Permit.25 Plant staff will submit all sampling and analytical results via SMARTS within 30 days of obtaining allresults for each sampling event. In the event a sample's analytical result is reported by the laboratoryas naon-detect or less than the method detection limit, the method detection limit will be provided. Avalue of zero will not be reported.Plant staff will provide the sample analytical results reported by the laboratory as below the minimumlevel (often referred to as the reporting limit) but above the method detection limit. Reported analyticalresults from multiple discharge points will be averaged automatically by SMARTS. For anycalculations required by this General Permit, SMARTS will assign a value of zero for all results lessthan the minimum level as reported by the laboratory.26 9. ANNUAL REPORTING (PERMIT SECTIONS XV AND XVI)Plant staff will conduct an Annual Comprehensive Facility Compliance Evaluation (Annual Evaluation)each reporting year (July 1 to June 30). If the Annual Evaluation is conducted fewer than eight monthsor more than sixteen months after the previous Annual Evaluation, the Facility will document thejustification for doing so. Within 90 days of the Annual Evaluation, PG&E will revise the SWPPP asappropriate and implement the revisions. At a minimum, the Annual Evaluations will cover thefollowing:* Review of all sampling, visual observation, and inspection records conducted during theprevious reporting year;* Inspection of all areas of industrial activity and associated potential pollutant sources forevidence of, or the potential for, pollutants entering the storm water conveyance system;* Inspection of all drainage areas previously identified as having no exposure to industrialactivities and materials in accordance with the definitions in Section XVII;* Inspection of equipment needed to implement the BMPs;* Inspection of all site BMPs;* Review and effectiveness assessment of all BMPs for each area of industrial activity andassociated potential pollutant sources to determine if the BMPs are properly designed,implemented, and are effective in reducing and preventing pollutants in industrial storm waterdischarges and authorized NSWDs; and* Assessment of any other factors needed to comply with the requirements in Section XVI .B.Information gathered during the Annual Evaluation will be recorded, on the form provided inAppendix E,Annual ReportPlant staff will certify and submit via SMARTS an Annual Report no later than July 15th following eachyear, and certified by the Legally Responsible Person. The Annual Report will include the following:* A Compliance Checklist that indicates compliance with all applicable requirements of theGeneral Permit;* An explanation for any non-compliance of requirements within the reporting year;* Identification of all revisions made to the SWPPP within the reporting year; and* The date of the Annual Evaluation.Copies of the Annual Report are included in Appendix G.27 REFERENCES1. California State Water Resources Control Board, 2014. Industrial Storm Water Permit forDischarges Associated with Industrial Activity (Order No. 2014-0057-DWQ).2. Storm Water Pollution Prevention Plan ((97-03-DWQ), Revision 2, 2011.3. Waste Discharge Requirements for PG&E Diablo Canyon Power Plant Units 1 and 2, Order90-09, NPDES No. CA0003751.4. PG&E Diablo Canyon Power Plant Spill Prevention Control and Countermeasure Plan (SPCC),2014.5. PG&E Diablo Canyon Power Plant Environmental Emergency Plan (Hazardous MaterialsBusiness Plan), Revision 21, February 2015.28 APPENDIX AGeneral Permit for Storm Water Discharges Associated with Industrial Activities(State Water Resources Control Board Order 2014-0057-DWQ)
APPENDIX BPermit Registration Documents APPENDIX CSWPPP Amendment Form ecinadSummary of WPAmn etso Revision s DEampe Form) iSection and Summary of Revision Date Name / TitlePage ____________________________________t +
APPENDIX DTraining Log SWPPP Training Log (Example Form)Name of Trainer:___________________Date of Training:___________________Location of Training: ________________Topics covered:[] SWPPP compliance responsibilities[] BMP implementation[] BMP effectiveness evaluations[] Visual observations[] Monitoring activities*] SMARTS reportingName Tidle Company Signature APPENDIX EIndustrial Storm Water Facility Inspection and Visual Observation Form Industrial Storm Water Facility Inspection and Visual Observation Form (Example Form)General Inormation ...Facility NameWDID No.Date of Inspection Start/End TimeInspector's Name(s)Inspector's Title(s)Inspector's Contact InformationInspector's QualificationsInspector's Signature __________________________________Type of Inspection* El Monthly Visual Observation El Sampling Event Visual Observation', :,..- , " ~~Weathier Infofrmation i ' ."-Weather at time of this inspection?El Clear 0 Cloudy El Rain [] Sleet El Fog El Snow [] High Winds[] Other: Temperature:If this is a sampling event visual observation, fill in storm event information:Date Storm Began: Rain Gauge Level: Rain Gauge ID:" " ' ' .~~Visual "' " .'Are there any spills/leaks observed at the time of inspection? ElYes ElNoIf yes, describe:Have any previously unidentified discharges of pollutants occurred since the last inspection? ElYes ElNoIf yes, describe:Are there any discharges occurring at the time of inspection.? ElYes ElNoIf yes, note the presence of any of the following:El Floating Materials ElSheen El Discoloration El Turbidity El Odor El Trash/Debris El Other:Describe all checked above:, ' ,: ..... Observations : f : :,i",....Outfall Observations Is NSWD Potential Corrective Action Person Date CorrectiveNo. Present? Source(s) of Contacted Action____NSWD CompletedElYesElNoE]YesElNoEl yesEl]No*Mont~hly visual observations will be conducted during daylight hours of normally scheduled Facility operation and on days withoutprecipitation. Sampling event visual observations will be recorded at the same time sampling occurs at a discharge location.
BMP Control Measures* Describe corrective actions initiated, date completed, and note the person that completed the work in theCorrective Action Log.S Structual Conitt61 If No, Ii, Need of Correctfive Action Needid and Measure :" Measureis °Maintenane, (identify needed maintenance and repairs, or anySOperating Repair,, or
- failed* control measures that need replacement)' ' .... ':' " Effectively?, R ... aceme..nt.....1 ElYes ElNo El MaintenanceEl Repair____ El Replacement2 EYes E--No El MaintenanceEl RepairEl Replacement3 LIYes ElNo El MaintenanceEl RepairEl Replacement4 EYes ElNo El MaintenanceEl RepairEl Replacement5 EYes ElNo El MaintenanceEl RepairEl Replacement6 EYes ElNo El MaintenanceEl RepairEl Replacement7 EYes ElNo El MaintenanceEl RepairEl Replacement8 EYes ElNo El MaintenanceEl Repair____ El Replacement9 Eyes ElNo El MaintenanceEl RepairEl Replacement ________________________10 ElYes ElNo El MaintenanceEl Repair____ El Replacement37 Areas of Industrial Materials or Activities exposed to storm waterBelow is a list of areas that should be assessed during routine inspections[r Customize this list as needed for the"specific types of industrial materials or activities at your Facility.S Area/Activity :,Inspeted? .. Corrective Action Needed and Notes'..... ... .... ~(appropriate,' : : .... .... " :: " : i' , ; : effective, and :: ..1 Material LiYes LiNo Li N/A LiYes LiNoloading/unloading andstorage areas2 Equipment operations and LIyes []No Li N/A LiYes LiNomaintenance areas3 Fueling areas LiYes LINo Di N/A LiYes LiNo4 Outdoor vehicle and LiYes LiNo Li N/A LiYes LiNoequipment washing areas5 Waste handling and LiYes LiNo Li N/A LiYes LiNodisposal areas6 Erodible LiYes LiNo Li N/A LiYes LiNoareas/construction7 Non-storm water/ ilicit LiYes LiNo Li N/A LiYes LiNoconnections*8 Dut tgeneration and LiYes LiNo Li N/A LiYes LiNovehicle tracking9 General Housekeeping LiYes LiNo Li N/A LiYes LiNo10 LiYes LiNo Li N/A LiYes LiNo*Include a description of the source, quantity, freq uency, and characteristics of the non-storm waterdischarges, associated drainage area, and whether it is an authorized or unauthorized non-storm water*discharge.Non-ComplianceDescribe any incidents of non-compliance observed and not described above:
Additional ControlMeasures**Describe any additional control measures needed to comply with the permit requirements:**Additional Control Measures include the following categories as described in the General Permit:Minimum BMPs: Good Housekeeping," Preventaa've Maintenance;" Spill and Leak Protection;" Material Han dungand Waste Management;" Erosion and Sediment Controls;" Employee Training," and Quality Assurance and RecordKeepingAdvanced BMPs: Exposure Minimiztion," Storm Water Containment and Discharge Reduction,' and TreatmentControlNotesUse this space for any additional notes or observations from the inspection:
APPENDIX FGeneral Permit Attachment H "Sample Collection and Handling Instructions" and(Example Chain of Custody Form)
APPENDIX GAnnual Reports