ML16048A211

SB14 Performance Report (2010)

ML16048A211
Person / Time
Site:	Diablo Canyon
Issue date:	12/31/2010
From:	Pacific Gas & Electric Co
To:	Office of Nuclear Reactor Regulation
Shared Package
ML16048A230	List: DCL-15-142, Pacific Gas & Electric 230kV Electrical Switchyard Voltage Support Project DCL-2011-512, 2010 Annual Report on Discharge Monitoring DCL-2014-500, 2013 Annual Report on Discharge Monitoring ML16048A204 ML16048A205 ML16048A206 ML16048A207 ML16048A208 ML16048A210 ML16048A211 ML16048A212 ML16048A213 ML16048A214 ML16048A215 ML16048A218 ML16048A219 ML16048A284 ML16048A286 ML16050A178 ML16050A180 ML16050A291 ML16050A292 ML16050A294 ML16050A296 ML16050A297
References
DCL-15-142, CAC MF4019, CAC MF4020
Download: ML16048A211 (45)

Text

F z DIABLO CANYON POWER PLANT -SB14 PERFORMANCE REPORT (2010)1.0 DNTRODUJCTION Routine waste generators of specified hazardous waste in excess of 12,000 kg/year (26,400 pounds) and/or extremely hazardous waste in excess of 12 kg/year (26.4 pounds) were required by Senate Bill 14 (SB 14), the Hazardous Waste Source Reduction and Management Review Act of 1989, Health and Safety Code Section 25244.12 et seq., to produce a Source Reduction Evaluation Review and Plan, and Performance Report, by September 1, 1991. In addition to development of the original "Plan" and "Report", generators are required to repeat this process every four years through the development of a Quadrennial Review and Plan and Performance Report.Subsequent legislation, SB 1726 (Chapter 853 of the 1992 Statute), which amended and added Sections to the Health and Safety Code, captured generators routinely producing over 5,000 kg (5.5 tons) of specified hazardous wastes and new generators in business since the passage of SB 14. The specified categories of hazardous waste, which primarily impact generators of aqueous and solid organic compounds, polychlorinated biphenyls (PCB s), and metal-containing solid waste, include:* Any RCRA hazardous waste for which a federal treatment standard has not been adopted or for which EPA has granted a delay of the effective date;* Any non-RCRA hazardous waste subject to treatment standards based upon incineration, solvent extraction or biological treatment, and;* Any non-RCRA hazardous waste subject to the treatment standard adopted for non-RCRA metal-containing solid waste pursuant to Section 66268.106(a)(3) of Title 22 of the California Code of Regulations.

SB 1726 also requires captured generators to proj ect a four-year numerical (percent) source reduction goal. For generators with completed SB 14 documents, the goal must be submitted with each Quadrennial Review and Plan.In addition, all generators must submit a biennial progress report (EPA Form GM, Waste Generation and Management) as part of the required biennial generator report (Title 22 of the California Code of Regulations).

The report must be completed by March 1 St of even numbered years. The numerical source reduction goal and biennial report are designed to support the original SB 14 goal of reducing the generation and release of hazardous waste to the environment by requiring documentation of hazardous waste management activities and source reduction options applicable to a generator's waste streams.Additional legislation, SB 1133, amended SB 14 by requiring inclusion of hazardous waste waters generated on-site in the SB 14 calculations and in the review of source reduction options. SB 1133 requires generators of hazardous waste waters, whether treated on-site or off-site, to include these volumes in the initial SB 14 Page 1 of 13 DIABLO CANYON POWER PLANT -SB14 PERFORMANCE REPORT (2010)tabulation, regardless of ultimate disposition.

If the included waste water is a SB 14 maj or waste' stream (more than 5% of the total SB 14 waste), then applicable source reduction measures are to be evaluated.

In addition, the waste water volume is then removed from the original SB 14 calculation, and a new calculation is made to determine all other SB 14 maj or wastes.The Diablo Canyon Power Plant completed the original Source Reduction Review and Plan and Performance Report by September 1, 1991 (baseline year = 1990), and submitited the subsequent Biennial Progress Report (1993 data) on March 1, 1994. In addition, an SB14 Status Report was produced in 1994. Quadrennial source reduction evaluation reviews and plans were produced in 1995 (1994 data), 1999 (1998 data), and 2003 (2002 data), and 2007 (2006 data). This document, and the Quadrennial Source Reduction Evaluation Review and Plan-2010 Reporting Year, for the Diablo Canyon Power Plant, provides the following information and facility waste generation data:* Facility information

• Site description

• Waste generation

• Current waste management practices* Results of past waste management practices Additional companion documents to this Performance Report, prepared by September 1, 2011, include:* Quadrennial Summary Progress Report (SPR) -2010 Reporting Year* Quadrennial Source Reduction Evaluation Review and Plan -2010 Reporting Year 2.0 FACILITY INFORMATION Reference Section 6. 2 of the DTSC Guidance Manual Facility Name: Diablo Canyon Power Plant (DCPP)Pacific Gas & Electric Company Address: 9 Miles NorthWest of Avila Beach P.O. Box 56 Avila Beach, California, 93424 Telephone:

(805) 545-3607 Trevor Rebel, Senior Environmental Coordinator EPA ID#: CAD077966349 SIC Code: 4911 Type of 1Business:

Electrical Generation, Nuclear Steam Power Plant Facility Operational:

1984 Number of Employees:

1,300 (estimated)

Page 2 of 13 DIABLO CANYON POWER PLANT -SB14 PERFORMANCE REPORT (2010)3.0 SITE DESCRIPTION AND ELECTRICAL GENERATION Referenced Section 6.2 of the DTSC Guidance Manual The Diablo Canyon Power Plant, operated by Pacific Gas and Electric Company, is located nine miles northwest of Avila Beach, California.

The plant produces electrical energy using two nuclear powered generation units (Unit 1 rated at 1,153 Megawatts Electric MWe; and, Unit 2 rated at 1, 182 MWe [turbine generator nameplate ratings]).

The facility has a total namePlate generation rating capacity of 2,335 MWe.Table 1. Megawatt-Hour (MWe-hr.)

Net Generation at Diablo Canyon PowerPlant, 2006 and 2010.2006 2010 Unit 1 9,944,983 8,698,083 IUnit 2 8,520,000 9,815,586 Total 18,464,983 18,513,669 The plant output, or electrical production at Diablo Canyon Power Plant, is measured as megawatt-hour generation (MWe-hr).

During 2006, the total generation was 18,464,983 megawatt-hours, while during the 2010 reporting year generation was 18,513,669 megawatt-hours (Table 1). Total facility generation increased from 2006 to 2010 due to improvements in maintenance outage duration performance and capital improvement proj ects (steam generator and reactor head replacement).

Output ratings and generation figures, as shown above, are derived from PG&E DCPP Plant Operations Statistics for 2006 and 2010.4.0 WASTE GENERATION AND MANAGEMENT PRACTICES Reference Sections 6.3 through 6.5 of the DTSC Guidance Manual During the electrical generation process and associated power plant maintenance activities, a variety of hazardous wastes are generated.

Major power plant reactor re-fueling outages are scheduled to conduct overhaul activities, which increase the generation of non-routine hazardous wastes. Unscheduled forced maintenance outages may also impact total site waste generation volumes. The following section presents a description of the six major SB 14 waste streams generated at Diablo Canyon Power Plant during the 2006 and 2010 reporting years.In 2006, the baseline comparison year for this report, 46.78 tons of total hazardous waste, including 32.21 tons of non-exempted routine SB 14 waste, was generated at Diablo Canyon. The five major Category-B SB 14 waste streams in 2006 totaled 27.78 tons and comprised 59.39% of overall facility hazardous waste generation.

In page 3 of 13 DIABLO CANYON POWER PLANT -SB14 PERFORMANCE REPORT (2010)2010, 48.13 tons of total hazardous waste, including 24.78 tons of non-exempted routine SB 14 waste, was generated.

The six maj or Category-B SB 14 waste streams in 2010 totaled 22.2 tons, and comprised 46.13% of overall facility hazardous waste generation.

2006 facility major Category-B SB 14 wastes are summarized in the following table (Table 2): 1. Inorganic Solid Waste (CWC 181) =3.79 tons 2. Waste Oil (CWC 221) = 6.53 tons 3. Oil Containing Waste (CWC 223) = 6.41 tons 4. Organic Solids (CWC 352) =1.6 tons 5. Paint sludge (CWC 461) = 1.6 tons Table 2. Maj or Category-B SB 14 Waste Streams for DCPP 2010.CWC = California Waste Code Other minor Category-B SB 14 wastes generated during 2010 accounted for 2.58 tons and included: alkaline solutions without metals (CWC 122); unspecified alkaline solutions (CWC 123); aqueous solutions with metals (CWC 132); aqueous solutions with organic residues <10% (CWC 134);unspecified aqueous solutions (CWC 135); off-specification, aged, or surplus inorganics (CWC 141);hydrocarbon solvents (CWC 213); PCB contaminated materials and debris (CWC 261); off-specification, aged, or surplus adhesives (CWC 281); latex paint wastes (CWC 291); off-specification, aged, or surplus organics (CWC 331); organic liquids with metals (CWC 342); laboratory waste chemicals (CWC 551); contaminated soil (CWC 611); liquids with mercury => 20 ppm (CWC 725), and halogenated organics (CWC 741).Page 4 of 13 DIABLO CANYON POWER PLANT -SB14 PERFORMANCE REPORT (2019)Table 3. Hazardous Waste Generated at Diablo Canyon Power Plant -2006 and 2010____ HaaduWstGeetin2006 2010 CWC Waste Stream Description Tons SB14 Tons SB14____________________________

______Waste

% Waste %122 Alkaline Solution without Metals pH=> 12.5 0.07 0.22 122

• Alkaline Solution without Metals pH=> 12.5 1.33 123 Unspecified Alkaline Solution 0.019 0.06 0.02 0.09 132 Aqueous Solutions with Metals 0.0 17 0.05 0.22 0.88 134 Aqueous Solution (Organic Residue < 10%) 0.17 0.53 0.28 1.12 135 Unspecified Aqueous Solution _____ 0.17 0.69 141 Off-Specification, Aged, or Surplus Inorganics 0.18 0.56 0.21 0.83 151

• Asbestos 0.26 _____ 0.19 181 Inorganic Solid Waste 6.67 20.72 3.79 15.30 213 Hydrocarbon Solvents 0.10 0.30 0.07 0.30 221

• Waste Oil 12.44 221 Waste Oil 6.52 20.23 6.53 26.36 223

• Oil Containing Waste 22.2 223 Oil Containing Waste 8.77 27.22 6.41 25.85 261

• Polychlorinated Biphenyls (PCBs) 0.10 0.30 261 PCB Contaminated Materials 0.64 2.00 0.01 0.05 281 Adhesives 0.36 1.13 0.10 0.41 291 Latex Waste 0.29 0.89 0.07 0.29 331 Off-Specification, Aged, or Surplus Organics 1.14 3.54 0.32 1.28 342 Organic Liquids with Metals 0.03 0.10 343 Organic Liquid Mixture 0.92 2.85 2.27 9.17 352 Organic Solids 3.48 10.82 1.60 6.47 461 Paint Sludge 2.34 7.25 1.60 6.45 491

• Unspecified Sludge Waste 0.21 0.68 551 Laboratory Waste Chemicals 0.01 0.03 611 Contaminated Soil 0.14 0.42 0.99 4.00 725 Liquids with Mercury =>20 mg/I 0.004 0.01 0.01 0.02 741 Halogenated Organics > 1000 mg/1 0.04 0.14 0.08 0.32 792

• Liquids with pH =< 2.0 with Metals 0.23 _________

____Total Site Hazardous Waste Generation (Tons) .... .46.78 ....... 48.13 TtlS4AplabeWs Generation (Tons) 32.21 24.78 .... ...Total. 51MaoCaeoyBWse(on)27.78

....__ 22.20 ____Data Source for Baseline Year Data (2006): Source Reduction Evaluation Review and Plan and Source Reduction Performance Report Diablo Canyon Power Plant 2006 Reporting Year* Indicates waste generated on a non-routine basis, or waste exempt from SB 14 consideration.

Bold Print represents a major SB 14 waste category (>5% of total SB 14 wastes) in 2006 and/or 2010 reporting year.Page 5 of 13 DIABLO CANYON POWER PLANT -SBI4 PERFORMANCE REPORT (2010)Total Waste Generation and SB14 Waste Catagories at Diablo Canyon Power Plant -2006* Non-Routine and SB 14 Exempt Wastes 31.1%U Other SB14 Wastes 9.5%* Inorganic Solid Wastes 14.3%P13.9%0] Oil Containing Waste 18. 7%* Paint Sludge [] Organic Solids 5.0% 7.4%Figure 1. Total Waste Generation at Diablo Canyon Power Plant (DCPP) during 2006.Total Waste Generation and SB14 Waste Catagories at Diablo Canyon Power Plant -2010* Inorganic Solid Wastes 7.9%[] Non-Routine and SB-14 Exempt Wastes 48.5%* Waste Oil 13.6%Waste 13.3%[] Organic Liquid Mixture 4. 7%* Organic Solids 3.3%* Other 5B14 Wastes U Paint Sludge 5.4% 3.3%Figure 2. Total Waste Generation at Diablo Canyon Power Plant (DCPP) during 2010.Page 6 of 13 DIABLO CANYON POWER PLANT -SBI4 PERFORMANCE REPORT (2010)SB14 Waste Generation at Diabio Canyon Power Plant -2010 U Other SBl4 Wastes U Inorganic Solid 10.4% Wastes U Paint Sludge153 U Organic Solids 6.5%*U Waste Oil 26.4%[] Organic Liquid Mixture 10 Oil Containing

9. 2% Waste 25.9%Figure 3. SB 14 Waste Generation at Diablo Canyon Power Plant (DCPP) during 2010.During the 2010 reporting year, 48.13 tons of total hazardous waste, and 24.78 tons of non-exempted routine Category-B SB 14 wastes were generated at DCPP. The following paragraphs discuss the six major SB814 waste streams generated at DCPP during the 2010 reporting year (inorganic solid waste, waste oil, oil containing waste, organic liquid mixtures, organic solids, and paint sludge) and other generated hazardous wastes.In accordance with SB 14 definitions, "aqueous waste" refers to a hazardous waste stream processed in a wastewater treatment unit which discharges to a POTW or discharges to receiving waters under a National Pollution Discharge Elimination Systems (NPDES) Permit (reference December 2010 DTSC Guidance Manual for SB14). DCPP operates a once-through-cooling water system under an NPDES permit. The only aqueous waste streams that are treated prior to discharge under the facility NPDES Permit do not exhibit hazardous characteristics prior to treatment.

Therefore, all waste streams identified and described in the following report section are categorized as non-aqueous Category-B wastes according to the DTSC SB 14 Guidance Manual definitions.

4.1 Inorganic

Solid Waste (CWC 181)During 2010, inorganic solid waste was a major 5B14 waste with 3.79 tons generated.

This represented 15.3 %of the total SB 14 waste generation at Diablo Canyon Power Plant (Table 2; Figure 3). Inorganic solid wastes decreased by 2.9 tons, or 43.2 % from, the 2006 reporting year. This waste category was composed of the following:

abrasive blast media waste (1.1 tons), broken fluorescent lamps (0.26 tons), paint chips containing lead and lead contaminated debris (0.54 tons), acid/caustic contaminated debris (0.65 tons), dirt, dust, and fine debris contaminated with metals (1.18 tons), and chromate contaminated debris (0.09 tons). Waste abrasive material (blast media) was generated from cleaning or stripping power plant equipment and components prior to Page 7 of 13 DIABLO CANYON POWER PLANT -SBI4 PERFORMANCE REPORT (2010)surface coating application.

Broken fluorescent tubes were generated from office lighting maintenance and replacement.

Lead contaminated debris was generated from lead paint abatement activities.

Acid and caustic contaminated debris was generated from routine maintenance and operations of water treatment ion-exchange systems. Dirt and dust contaminated with metals was generated from routine power plant cleaning activities and abrasive blasting operations.

Chromated debris was generated from routine maintenance of emergency diesel engine powered electrical generation systems that contain corrosion inhibiting chromated cooling water.Inorganic solid wastes are generally land-filled at regulated off-site disposal facilities.

4.2 Waste

Oil (CWC 221)Waste oil from routine operations was another major Sf14 waste with 6.53 tons representing 26.4 % of total SBI14 waste generation (Table 2; Figure 3). Waste oils consisted primarily of spent rotating equipment lubrication oil, used diesel generator lubrication oil, and machinery gear oil generated from routine lubrication oil reservoir replenishment or change-out, and off-specification warehouse stock disposal.

As a result of continued frequent preventative maintenance processes at the facility, routine waste oil generation from plant equipment operations has remained elevated and relatively stable on an annual basis subsequent to the 2002 SB 14 reporting year. Therefore, the waste stream remained a major Category-B source (previous to 2002, the waste stream was not designated a major SBl14 source).Waste oil is recycled at off-site facilities either through reprocessing or use as fuel.4.3 Oil Containing Waste (CWC 223)During 2010 oil containing waste was a major SB 14 waste representing 6.41 tons, or 25.85 % of the total SB 14 waste generated (Table 2; Figure 3). Oil containing wastes consisted primarily of adsorbents, mats, rags, pads, plastic containers, and miscellaneous materials generated during routine maintenance.

Another source of oil containing waste was generated from periodic cleanup involving vehicles, machinery, heavy equipment, transformer maintenance, shop activities, and power plant equipment leaks.This waste stream decreased by 2.36 tons (27 %) from the 2006 reporting year. Oil contaminated materials are either incinerated or land-filled (metal filters and clay absorbents) at off-site facilities.

4.4 Organic

Liquid Mixture During 2010 unspecified organic liquid mixtures were a major SB 14 waste stream representing 2.27 tons, or 9.17% of the total SB 14 waste generated (Table 2; Figure 3). Unspecified organic liquid mixtures wastes include water treatment chemical mixtures, off specification solvent liquids, and solvent contaminated lubrication oils. Organic liquid mixtures are incinerated at off site facilities.

Page 8 of 13 DIABLO CANYON POWER PLANT -SB14 PERFORMANCE REPORT (2010)4.5 Organic Solids (CWC 352)The generation of organic solids in 2010 was 1.6 tons (Table 2; Figure 3) or 6.47 % of the total SBl14 waste.Organic solids consisted mainly of surface coatings related paint and solvent contaminated personal protective equipment (PPE), cloth rags, paper, tape, and plastics that were generated during ongoing coatings repair and maintenance associated with corrosion control of metal plant equipment and buildings.

In 2010, organic solids generation decreased 1.9 tons (54 %) from the 2006 reporting year. Organic solid wastes are recycled as fuel grade materials at off-site facilities.

4.6 Paint

Sludge (CWC 461)Paint sludge comprised 6.45 % or 1.6 tons of SB 14 waste in 2010. The paint sludge was generated from cleanup, off-specification materials, unused paint residue from individual coatings maintenance work, and expired shelf-life paint surplused fr'om warehouse stock. The generation of paint sludge in 2010 decreased by 0.74 tons (31.6%) from the 2006 reporting year due to continued increase in inventory control efficiency, and improved field level utilization of inventory.

Paint sludge is recycled as fuel grade materials at off-site facilities.

4.7 Other

Generated SB14 Wastes and Non SB14 Wastes A number of other Category-B wastes were generated at Diablo Canyon Power Plant during 2010, represented as "other SB 14 waste" in Figures 2 and 3, and comprised 2.58 tons or 10.4% of SBl14 waste generation.

These wastes were generated during routine plant maintenance and equipment overhaul activities, or resulted fr'om surplus and disposal of off-specification materials stock. Associated waste volumes are itemized in Table 3.Other minor Category-B SB 14 wastes generated during 2010 accounted for 2.58 tons and included: alkaline soluti~ons without metals (CWC 122); unspecified alkaline solutions (CWC 123); aqueous solutions with metals (CWC 132); aqueous solutions with organic residues <10% (CWC 134);unspecified aqueous solutions (CWC 135); off-specification, aged, or surplus inorganics (CWC 141);hydrocarbon solvents (CWC 213); PCB contaminated materials and debris (CWC 261); off-specification, aged, or surplus adhesives (CWC 281); latex paint wastes (CWC 291); off-specification, aged, or surplus organics (CWC 331); organic liquids with metals (CWC 342); laboratory waste chemicals (CWC 551); contaminated soil (CWC 611); liquids with mercury => 20 ppm (CWC 725), and halogenated organics (CWC 741).Wastes exempt from SB 14 consideration were also generated at Diablo Canyon Power Plant during 2010.These SB 14 exempt and/or non-routine generated wastes totaled 23.35 tons (48.5% of total site waste generation) and included:

friable asbestos -SB14 exempted waste stream (CWC 151); oil containing waste water -non-routine waste oil generated from very infrequent sump cleanout; polychlorinated Page 9 of 13 DIABLO CANYON POWER PLANT -SB14 PERFORMANCE REPORT (2010)biphenyl articles-S5B14 exempted waste stream (CWC 261); unspecified sludge waste -wastewater settling sludge from non-routine water treatment systems maintenance (CWC 491).5.0 CHANGES SINCE BASELINE YEAR Reference Sections 6.3 thru 6. 7 of the DTSC Guidance Manual A comparison of hazardous waste generation between the baseline (2006 and reporting 2010) years indicates that total hazardous waste volumes generated on-site rose by 1.35 tons or 2.89% (Total waste generation in 2006 was 46.78 tons, and in 2010 was 48.13 tons). The rise is total hazardous waste is due to a veiy infrequent sump cleanout task (last performed approximately 20 years ago). This infrequent maintenance activity generated 22.2 tons of oily waste water.SBI14 Category-B applicable hazardous waste generation decreased by 7.43 tons (23.1%) from 32.21 tons in 2006 to 24.78 tons in 2010. During the same period, electrical generation (facility production) increased by 0.3 %primarily due to improvements in scheduled re-fueling outage performance and major capital equipment improvement projects (steam generators and reactor head assembly).

Of the five SB 14 major waste groups identified for source reduction planning in the 2006 baseline year, routine waste generation for four of the five of the groups resulted in reductions during the 2010 reporting year. The'following summarizes the maj or SB 14 waste stream comparisons from 2006 to 2010.Inorganic solid waste (CWC 181), a routine maj or SB 14 waste stream in 2006, decreased by 2.9 tons (43.2%)from 2006 to 2010 primarily due to decreased routine generation of spent sand blast media associated with equipment maintenance and coating activities.

More efficient and effective coating processes that have decreased the rate of ongoing metal corrosion has in-turn decreased the amount of existing coating materials that require removal and subsequent surface repair, and some newer equipment does not require periodic stu'face refinishing (stainless steel and aluminum surfaces).

Inorganic solids have again been identified as a major SB 14 waste for the 2010 reporting year.Waste oil (CWC 221), a major SB 14 routine waste stream in 2006, rose by 0.03 tons or 60 lbs (0.1%) in 2010.Routine equipment oil changeouts and sampling have generated a nominal or baseline amount of waste oil for this reporting period. Waste oil has again been identified as a maj or SB 14 waste for 2010 reporting.

Oil containing waste (CWC 223), a routine major SB 14 waste stream in 2006 decreased 2.36 tons (27 %) in 2010 due to continued improvements in plant housekeeping, more efficient and timely identification and repair of lubrication leaks, and operations process changes that have resulted in reduction of oil contaminated waste generation.

Oil containing waste has again been identified as a maj or SB 14 waste for the 2010 reporting year.Page 10 of 13 DIABLO CANYON POWER PLANT -SB14 PERFORMANCE REPORT (2010)Organic liquid mixtures were identified as a major SBl14 waste stream representing 2.27 tons or 9.17% of the total SB 14 waste generated in 2010. Organic liquid mixtures were a new maj or SB 14 waste for the 2010 reporting year.Organic solids (CWC 352), a routine major SBl4 waste stream in 2006 decreased 1.88 tons (54%) in the 2010 reportring year. Ongoing reduction in the use of cloth, paper, and plastic coverings during surface coating operations has helped reduce overall generation of this waste stream. Organic solids have again been identified as a major SB14 waste for the 2010 reporting year.Paint sludge (CWC 461), a routine major SB 14 waste stream in 2006 decreased 0.74 tons (31.6%) in 2010. The continued decrease in generation reflects effective ongoing implementation of materials inventory controls that reduce surplusing of off-specification and unused/unnecessary paints and epoxy resin coatings.

Furthermore, continued improvement in field level utilization of paint inventoiy¢, and mixing/preparing only the volume that is required to complete the job at hand, has resulted in further reduction in the generation of un-used waste paint at the individual job site. Regardless, extensive coatings and corrosion control efforts continue at the facility, therefore, paint sludge has again been identified as a maj or SB 14 waste for 2010 reporting.

Facility Source Reduction Activities The following is an overview of past, present, and continuing source reduction and waste minimization activities conducted at the facility: Asbestos -suitable non-hazardous substitutes are used during asbestos replacement actions.Recycling Activities

-waste oil, oily water, used oil filters, solvents, mercury waste, fluorescent tubes, light ballasts, toner cart[ridges, lead-acid batteries, paint sludge and many other hazardous and/or industrial wastes.Chlorine Gas -use of sodium hypochlorite was implemented as an effective substitute.

Mercury Waste -this extremely hazardous waste has been eliminated from chemistry laboratory process waste streams through the replacement of Nessler's Reagent (HgI 2) with specific ion electrode teclmology, the elimination of mercuric nitrate, and the, use of Mercuric Thiocyanate, a less toxic alternative.

Chrornated Water -the majority of chromate based corrosion inhibitors have been replaced with less hazardous molybdate based corrosion inhibitors.

Ammonium Hydroxide

-process chemical was replaced with less hazardous monoethanolamine (ETA).Oily Solids -Training based on job responsibilities has been previously implemented and continues to facilitate segregation of oil saturated materials from non-saturated materials.

New methods for reducing oily solid wastes are evaluated as they become available.

Paint Related Waste -.a significant number of solvents, thinners and coatings have been eliminated from use, and suitable substitutes are now in use. Enhanced product inventory controls, and reduction in the generation of excess coating mixture preparations at individual job sites have been successful and continue to be implemented.

Solvents -the laundry dry cleaning and parts/tool cleaning units were discontinued at the facility.

This eliminated the generation of spent Freon, associated contaminated filters, contaminated solids, sludges and oils.Material Coatings -epoxy resin coatings are used only when absolutely necessaiy, and facility personnel continue to pursuing alternatives and substitutes for remaining epoxy applications as feasible.Page 11 of 13 DIABLO CANYON POWER PLANT -SB14 PERFORMANCE REPORT (2010)Acid/Caustic Debris Reductions

-continuous inspection and preventative maintenance of freshwater treatment ion exchange systems have reduced spills and necessity for clean-up of acids and caustics.Waste Oils -establishment of tighter controls and extending the time cycle of equipment overhauls has reduced waste oil generation.

Limited locations where lubricating oil drums are opened and stored, as well as limiting the number of containers open at any one time, also reduced off-specification and excess waste oil generation.

Aerosol Cans -increased employee awareness and recognizing employee waste reduction efforts reduced the generation of waste aerosol cans. A number of substitutes for aerosol cans (sprays/pumps) are presently in use.Empty and/or Damaged Drums -reused, recycled or returned to vendors.Hazardous Waste Disposal -heavy duty, triple-walled paper boxes are used in place of 55 gallon steel drums for hazardous wastes that can be incinerated.

Each box can store the equivalent of four steel drums, and reduces overall use of packing materials and metal.Surplus Hazardous Materials

-made available to other facilities for use, rather than disposing of the materials as hazardous wastes.Hazardous Materials Inventory Control Program -The plant has continued to conduct and refine a program to review and control the procurement and distribution of hazardous materials.

All hazardous materials are reviewed for health, safety and enviromnental impacts prior to acquisition (DCPP Facility Procedure EV2.DC4).The program has increased inventory controls (only required materials are ordered), reduced the overall amount of material in inventory, and reduced disposal of materials (e.g. paint and resins) due to shelf life expiration.

Environmental Operations

-This plant organization provides guidance to facility administrative staff and field level workers on proper hazardous material and hazardous waste management, and promotes efforts for source reduction and waste minimization.

Employee Training Program -employees receive annual hazardous material and hazardous waste training at various levels depending on job requirements.

This training continuously improves awareness with regard to source reduction and waste minimization activities, new regulations, improved plan procedures and work guidance documents, and includes the following training modules:* Hazardous Waste Management

• Hazard Communication

• Hazardous Waste, Storage, Treatment and Manifesting

• Hazardous Waste Workplace Accumulation Areas and Transfer Locations* Chemical Awareness* Spill Response* Hazardous Materials Incident -Initial Response/Mitigation

• Asbestos Management Training Employee Recognition Program -Diablo Canyon Power Plant previously implemented an employee incentive program thatprovided rewards for ideas that benefited the plant (ideas included those that would promote source reduction and hazardous and extremely hazardous waste minimization).

Emergency Response Guidance, Spill Prevention Control and Countermeasure Plan -designed to protect human health and the environment.

Updating of these documents occurs as required by regulation.

The facility also maintains a Hazardous Waste Management Program and related procedures.

The SPCC plan includes routine equipment inspection to minimize the potential for materials leaks.Waste Management System -a hazardous waste management system, PG&E environmental compliance information tracking system (EIS-previous

& Enviance-current), and other databases are used at Diablo Canyon Power Plant to track hazardous waste management activities.

The systems allow the plant to access historic waste generation information and produce ongoing required waste management reports in a variety of formats.PG&E Utility Environmental Committees and Coordination Meetings -objectives include sharing and transferring of source reduction and waste minimization data and information.

Page 12 of 13 DIABLO CANYON POWER PLANT -SB14 PERFORMANCE REPORT (2010)6.0 CERTIFICATION Reference Section 6.8 of the DTSC Guidance Manual Technical Certification for the Performance Report I certif~y that this report meets the requirements of Title 22 California Code of Regulations (CCR) Section 67100.13 (d)( 1) regoarding hazardous waste generation onsite, and offsite management of hazardous waste.Tim Ihving ____________

Radiation Protection Manager Signature P acific G as & E lectric C om pany_ _ _ _ _ _ _ _ _ _ _ _ _ _ _Diablo Canyon Power Plant Date Financial Certification for the Performance Report I certify' that this document and all attachmnents were prepa'ed under my direction Or supervision in accordance with a system designed to assure that qualified personnel properly gather and evaluate the information submitted.

Based on my inquiry of the person or persons who manage the system, or the persons directly responsible for gathering the information, the information submitted is, to the best of my kcnowledge and belief, true, accurate and complete.

I am aware that there are significant penalties for makting false statements or representations to the Department, including the possibility of fines for criminal violations.

James M. Welsch ________________

Station Director Signature Pacific Gas & Electric Company_______________

Diablo Canyon Power Plant Date Page 13 of 13 DIABLO CANYON POWER PLANT -SB14 PERFORMANCE REPORT (2014)

1.0 INTRODUCTION

Routine waste generators of specified hazardous waste in excess of 12,000 kg/year (26,400 pounds) and/or extremely hazardous waste in excess of 12 kg/year (26.4 pounds) were required by Senate Bill 14 (SB 14), the Hazardous Waste Source Reduction and Management Review Act of 1989, Health and Safety Code Section 25244.12 et seq., to produce a Source Reduction Evaluation Review and Plan, and Performance Report, by September 1, 1991. In addition to development of the original "Plan" and "Report", generators are required to repeat this process every four years thr'ough the development of a Quadrennial Review and Plan and Performance Report.Subsequent legislation, SB 1726 (Chapter 853 of the 1992 Statute), which amended and added Sections to the Health and Safety Code, captured generators routinely producing over 5,000 kg (5.5 tons) of specified hazardous wastes and new generators in business since the passage of SB 14. The specified categories of hazardous waste, which primarily impact generators of aqueous and solid organic compounds, polychlorinated biphenyls (PCBs), and metal-containing solid waste, include:* Any RCRA hazardous waste for which a federal treatment standard has not been adopted or for which EPA has granted a delay of the effective date;* Any non-RCRA hazardous waste subj ect to treatment standards based upon incineration, solvent extraction or biological treatment, and;* Any non-RCRA hazardous waste subj ect to the treatment standard adopted for non-RCRA metal-containing solid waste pursuant to Section 66268.106(a)(3) of Title 22 of the California Code of Regulations.

SB 1726 also requires captured generators to project a four-year numerical (percent) source reduction goal. For generators with completed SB 14 documents, the goal must be completed with each Quadrennial Review and Plan. In addition, all generators must submit a biennial progress report (EPA Form GM, Waste Generation and Management) as part of the required biennial generator report (Title 22 of the California Code of Regulations).

The report must be completed by March 1 s of even numbered years. The numerical source reduction goal and biennial report are designed to support the original SB,14 goal of reducing the generation and release of hazardous waste to the environment by requiring documentation of hazardous waste management activities and source reduction options applicable to a generator's waste streams.Additional legislation, SB 1133, amended SB 14 by requiring inclusion of hazardous waste waters generated on-site in the SB 14 calculations and in the review of source reduction options. SB 1133 requires generators of hazardous waste waters, whether treated on-site or off-site, to include these volumes in the initial SB 14 Page 1 of 13 DIABLO CANYON POWER PLANT -SB14 PERFORMANCE REPORT (2014)tabulation, regardless of ultimate disposition.

If the included waste water is a SB 14 major waste stream (more than 5% of the total SB 14 waste), then applicable source reduction measures are to be evaluated.

In addition, the waste water volume is then removed from the original SB 14 calculation, and a new calculation is made to determine all other SB 14 maj or wastes.The Diablo Canyon Power Plant completed the original Source Reduction Review and Plan and Performance Report by September 1, 1991 (baseline year =1990), and submitted the subsequent Biennial Progress Report (1993 data) on March 1, 1994. In addition, an SB14 Status Report was produced in 1994.. Quadrennial source reduction evaluation reviews and plans were produced in 1995 (1994 data), 1999 (1998 data), and 2003 (2002 data), 2007 (2006 data), and 2011 (2010 data). This document, and the Quadrennial Source Reduction Evaluation Review and Plan -2014 Reporting Year, for the Diablo Canyon Power Plant, provides the following information and facility waste generation data:* Pacility information

• Site description

• Waste generation

• Current waste management practices* Results of past waste management practices Additional companion documents to this Performance Report, prepared by September 1, 2015, include:* Quadrennial Summary Progress Report (SPR) -2014 Reporting Year* Quadrennial Source Reduction Evaluation Review and Plan -2014 Reporting Year 2.0 FACILITY INFORMATION Reference Section 6.2 of the DTSC Guidance Manual Facility Name: Diablo Canyon Power Plant (DCPP)Pacific Gas & Electric Company Address: 9 Miles NorthWest of Avila Beach P.O. Box 56 Avila Beach, California, 93424 Telephone:

(805) 545-3607 Trevor Rebel, Senior Environmental Coordinator EPA ID#: CAD077966349 SIC Code: 4911 Type of Business:

Electrical Generation, Nuclear Steam Power Plant Facility Operational:

1984 Number of Employees:

1,350 (estimated)

Page 2 of 13 DIABLO CANYON POWER PLANT -SB14 PERFORMANCE REPORT (2014)3.0 SITE DESCRIPTION AND ELECTRICAL GENERATION Referenced Section 6.2 of the DTSC Guidance Manual The Diablo Canyon Power Plant, operated by Pacific Gas and Electric Company, is located nine miles northwest of Avila Beach, California.

The plant produces electrical energy using two nuclear powered generation units (Unit 1 rated at 1,153 Megawatts Electric MWe; and, Unit 2 rated at 1,182 MWe [turbine generator nameplate ratings]).

The facility has a total nameplate generation rating capacity of 2,335 ,MWe.Table 1. Megawatt-Hour (MWe-hr.)

Net Generation at Diablo Canyon Power Plant, 2010 and 2014.2010 2014 Unit 1 8,698,083 8,542,450 IUnit 2 9,815,586 8,486,119 Total 18,513,669 17,028,569 The plant output, or electrical production at Diablo Canyon Power Plant, is measured as megawatt-hour generation (MWe-hr).

During 2010, the total generation was 17,028,569 megawatt-hours, while during the 2014 reporting year generation was 17,028,569 megawatt-hours (Table 1). Total facility generation decreased from 2010 to 2014 due to forced outage activities and a scheduled refueling outage on each unit. Output ratings and generation figures, as shown above, are derived from PG&E DCPP Plant Operations Statistics for 2010 and 2014.4.0 WASTE GENERATION AND MANAGEMENT PRACTICES Reference Sections 6. 3 through 6. 5 of the DTSC Guidance Manual During the electrical generation process and associated power plant maintenance activities, a variety of hazardous wastes are generated.

Major power plant reactor re-fueling outages are scheduled to conduct overHaul activities, which increase the generation of non-routine hazardous wastes. Unscheduled forced maintenance outages may also impact total site waste generation volumes. The following section presents a description of the six major SB 14 waste streams generated at Diablo Canyon Power Plant during the 2010 and 2014 reporting years.In 2010, the baseline comparison year for this report, 48.13 tons of total hazardous waste, including 24.78 tons of non-exempted routine SB 14 waste, was generated at Diablo Canyon. The six maj or Categoiy-B SB 14 waste streams in 2010 totaled 22.2 tons and comprised 46.13% of overall facility hazardous waste generation.

In Page 3 of 13 DIABLO CANYON POWER PLANT -SB14 PERFORMANCE REPORT (2014)2014, 56.74 tons of total hazardous waste, including 28.50 tons of non-exempted routine SB 14 waste, was generated:

The four maj or Category-B SB 14 waste streams in 2014 totaled 24.94 tons, and comprised 43.9% of overall facility hazardous waste generation.

2014 facility major Category-B SB 14 wastes are summarized in the following table (Table 2): 1. Waste Oil (CWC 221) =13.28 tons 2. Oil Containing Waste (CWC 223) = 7.46 tons 3. Organic Solids (CWC 352) = 2.04 tons 4. Paint Sludge (CWC 461) =2.16 tons Table 2. Major Category-B SB14 Waste Streams for DCPP 2014.CWC = California Waste Code Other minor Category-B SB 14 wastes generated during 2010 accounted for 3.56 tons and included: unspecified alkaline solutions (CWC 123); aqueous solutions withmetals (CWC 132); aqueous solutions with organic residues >10% (CWC 133); off-specification, aged, or surplus inorganics (CWC 141);Inorganic Solid Waste (CWC 181); off-specification, aged, or surplus adhesives (CWC 281); latex paint wastes (CWC 291); off-specification, aged, or surplus organics (CWC 331); organic liquids with metals (CWC 342); Organic Liquid Mixtures (CWC 343); laboratory waste chemicals (CWC 551);contaminated soil (CWC 611); liquids with mercury => 20 ppm (CWC 725), and halogenated organics (CWC 741); liquids with pH < 2 (CWC 792).Page 4 of 13 DIABLO CANYON POWER PLANT -SBI14 PERFORMANCE REPORT (2014)Table 3. Hazardous Waste Generated at Diablo Canyon Power Plant -2010 and 2014_____Hazrdous Waste Generation 2010 2014 CWC Waste Stream Description Tons SB14 Tons SB14___________________________________Waste

% Waste %123 Unspecified Alkaline Solution 0.02 0.09 0.02 0.06 132 Aqueous Solutions with Metals 0.22 0.88 0.21 0.75 133 *Aqueous Solution (>10% Organic Residue) _____ 0.21 134 Aqueous Solution (Organic Residue < 10%) 0.28 1.12 ____135 Unspecified Aqueous Solution 0.17 0.69 ____141 Off-Specification, Aged, or Surplus Inorganics 0.21 0.83 0.02 0.08 151

• Asbestos 0.19 _____ 3.14 181 Inorganic Solid Waste 3.79 15.30 1.29 4.53 213 Hydrocarbon Solvents 0.07 0.30 221

• Waste Oil 13.28 221 Waste Oil 6.53 26.36 13.28 46.6 223

• Oil Containing Waste 22.2 ____ 10.41 223 Oil Containing Waste 6.41 25.85 7.46 26.17 261

• Polychlorinated Biphenyls (PCBs) 0.30 0.17 261 PCB Contaminated Materials 0.01 0.05 281 Adhesives 0.10 0.41 0.24 0.85 291 Latex Waste 0.07 0.29 0.21 0.75 291

• Latex Waste _____ 1.04 331 Off-Specification, Aged, or Surplus Organics 0.32 1.28 0.08 0.27 342 Organic Liquids with Metals 0.03 0.10 .005 0.02 343 Organic Liquid Mixture 2.27 9.17 0.96 3.36 352 Organic Solids 1.60 6.47 2.04 7.16 461 Paint Sludge 1.60 6.45 2.16 7.58 491

• Unspecified Sludge Waste 0.68 551 Laboratory Waste Chemicals 0.01 0.03 0.06 0.20 611 Contaminated Soil 0.99 4.00 0.27 0.94 725 Liquids with Mercury =>20 mg/l 0.01 0.02 .003 0.01 741 Halogenated Organics > 1000 mg/I 0.08 0.32 0.12 0.40 792

• Liquids with pH =< 2.0 with Metals _____0.08 0.27 Total Site Hazardo us Waste Generation (Tons) 48.13 ... ..56.74 TtlBJAplcbeWseGnrtn(Tn)24.78 28.50 ..Total SBi4 Major Category-B Wastes (Tons) 22.20 _____ 24.94 ____Data Source for Baseline Year Data (2010): Source Reduction Evaluation Review and Plan and Source Reduction Canyon Power Plant 2014 Reporting Year Performance Report Diablo* Indicates waste generated on a non-routine basis, or waste exempt from SB 14 consideration.

Bold Print represents a major SB 14 waste category (>5% of total SBI4 wastes) in 2010 and/or 2014 reporting year.Page 5 of 13 DIABLO CANYON POWER PLANT -SBI4 PERFORMANCE REPORT (2014)Total Waste Generation and SB14 Waste Catagories at Diablo Canyon Power Plant -2010* Inorganic Solid Wastes 7.9%*I Non-Routine and SB-14 Exempt Wastes 48.5%* Waste Oil Containing1.Wst 13.3%* Organic Liquid Mixture 4. 7%U Organic Solids 3.3%* Other SBI4 Wastes U Paint Sludge 5.4% 3.3%Figure 1. Total Waste Generation at Diablo Canyon Power Plant (DCPP) during 2010.Total Waste Generation and SBI4 Waste Catagorles at Diablo Canyon Power Plant- 2014* Waste Oil 23.4%* Non-Reulbe and SB.

Waste 49.8%Oil Centainln~g Waste 13.1%U PainIS'udgeE O 3.6%oid U Other 5B14 Wastes 3.8% 36 6.3%Figure 2. Total Waste Generation at Diablo Canyon Power Plant (DCPP) during 2014.Page 6 of 13 DIABLO CANYON POWER PLANT -SB14 PERFORMANCE REPORT (2014)SBI4 Waste Generation at Diablo Canyon Power Plant -2014 U Other SBI4 Wastes 12.$%'U Ptint 7.6%0 organicSoui, 4.6 7.,2%[1 WaseOi* olcenfalnbag 26.2%Figure 3. SB 14 Waste Generation at Diablo Canyon Power Plant (DCPP) during 2014.During the 2014 reporting year, 56.74 tons of total hazardous waste, and 28.5 tons of non-exempted routine Category-B SBI4 wastes were generated at DCPP. The following paragraphs discuss the four maj or SB 14 waste streams generated at DCPP during the 2014 reporting year (waste oil, oil containing waste, organic solids, and paint sludge) and other generated hazardous wastes.In accordance with SB 14 definitions, "aqueous waste" refers to a hazardous waste stream processed in a wastewater treatment unit which discharges to a POTW or discharges to receiving waters under a National Pollution Discharge Elimination Systems (NPDES) Permit (reference December 2010 DTSC Guidance Manual for SB14). DCPP operates a once-through-cooling water system under an NPDES permit. The only aqueous waste streams that are treated prior to discharge under the facility NPDES Permit do not exhibit hazardous characteristics prior to treatment.

Therefore, all waste streams identified and described in the following report section are categorized as non-aqueous Category-B wastes according to the DTSC SB 14 Guidance Manual definitions.

4.1 Waste

Oil (CWC 221)Waste oil from routine operations was a major SB 14 waste with 13.28 tons representing 46.6 % of total SB 14 waste generation (Table 2; Figure 3). Waste oils consisted primarily of spent rotating equipment lubrication oil, used diesel generator lubrication oil, and machinery gear oil generated from routine lubrication oil reservoir replenishment or change-out, and off-specification warehouse stock disposal.

As a result of continued frequent preventative maintenance processes at the facility, routine waste oil generation from plant equipment operations has remained elevated and relatively stable on an annual basis subsequent to the 2002 SB 14 reporting year. Therefore, the waste stream remained a major Page 7 of 13 DIABLO CANYON POWER PLANT -SBI4 PERFORMANCE REPORT (2014)Category-B source (previous to 2002, the waste stream was not designated a major SBl14 source). Waste oil is recycled at off-site facilities either through reprocessing or use as fuel.4.2 Oil Containing Waste (CWC 223)During 2010 oil containing waste was a major SB 14 waste representing 7.46 tons, or 26.18 % of the total SB14 waste generated (Table 2; Figure 3). Oil containing wastes consisted primarily of adsorbents, mats, rags, pads, plastic containers, and miscellaneous materials generated during routine maintenance.

Another source of oil containing waste was generated from periodic cleanup involving vehicles, machinery, heavy equipment, transformer maintenance, shop activities, and power plant equipment leaks.This waste stream increased by 1.05 tons (16 %) from the 2010 reporting year. This is largely due to the power plant having two scheduled refueling outages in 2014. Additionally, the facility had four forced outages during 2014. Outages, both scheduled and forced, generate additional oily waste streams. Oil contaminated materials are either incinerated or land-filled (metal filters and clay absorbents) at off-site facilities.

4.3 Organic

Solids (CWC 352)The generation of organic solids in 2014 was 2.04 tons (Table 2; Figure 3) or 7.16 % of the total SB14 waste.Organic solids consisted mainly of surface coatings related paint and solvent contaminated personal protective equipment (PPE), cloth rags, paper, tape, and plastics that were generated during ongoing coatings repair and maintenance associated with corrosion control of metal plant equipment and buildings.

In 2014, organic solids generation increased 0.44 tons (27 %) from the 2010 reporting year. This rise in organic solid waste (CWC 352)is directly attributable to two refueling outages in 2014. Organic solid wastes are recycled as fuel grade materials at off-site facilities.

4.4 Paint

Sludge (CWC 461)Paint sludge comprised 7.58 % or 2.16 tons of SB 14 waste in 2014. The paint sludge was generated from cleanup, off-specification materials, unused paint residue from individual coatings maintenance work, and expired shelf-life paint surplused from warehouse stock. The generation of paint sludge in 2014 rose by 0.56 tons (35%) from the 2010 reporting year due to two refueling maintenance outages in the 2014 reporting year. Paint sludge is recycled as fuel grade materials at off-site waste treatment facilities.

4.5 Other

Generated SB14 Wastes and Non SB14 Wastes A number of other Category-B wastes were generated at Diablo Canyon Power Plant during 2014, represented as "other SB 14 waste" in Figures 2 and 3, and comprised 3.56 tons or 12.49% of SBI14 waste generation.

These wastes were generated during routine plant maintenance and equipment overhaul activities, or resulted from surplus and disposal of off-specification materials stock. Associated waste volumes are itemized in Table 3.Page 8 of 13 DIABLO CANYON POWER PLANT -SB14 PERFORMANCE REPORT (2014)Other minor Categoiy-B SB 14 wastes generated during 2014 accounted for 3.56 tons and included: unspecified alkaline solutions (CWC 123); aqueous solutions with metals (CWC 132); aqueous solutions with organic residues >10% (CWC 133); off-specification, aged, or surplus inorganics (CWC 141);Inorganic Solid Waste (CWC 181); off-specification, aged, or surplus adhesives (CWC 281); latex paint wastes (CWC 291); off-specification, aged, or surplus organics (CWC 331); organic liquids with metals (CWC 342); Organic Liquid Mixtures (CWC 343); laboratory waste chemicals (CWC 551);contaminated soil (CWC 611); liquids with mercury => 20 ppm (CWC 725), and halogenated organics (CWC 741); liquids with pH < 2 (CWC 792).Wastes exempt from SB 14 consideration were also generated at Diablo Canyon Power Plant during 2014.These SB 14 exempt and/or non-routine generated wastes totaled 28.25 tons (49.8% of total site waste generation) and included:

ethylene glycol (antifreeze) from vehicles (CWC 133); friable asbestos -SB14 exempted waste stream (CWC 151); infrequent oil equipment change out (CWC 221); oil containing ballast from an infrequent building remodels (CWC 223); oil containing waste water -non-routine waste oil generated from infrequent sump cleanout," polychlorinated biphenyl articles -SB14 exempted waste stream (CWC 261); latex paint waste (CWC 291) from very infrequent building remodels.5.0 CHANGES SINCE BASELINE YEAR Reference Sections 6.3 thru 6. 7 of the DTSC Guidance Manual A comparison of hazardous waste generation between the baseline (2010 and reporting 2014) years indicates that total hazardous waste volumes generated on-site rose by 8.61 tons or 17.9% (Total waste generation in 2010 was 48.13 tons, and in 2014 was 56.74 tons). The rise in total hazardous waste is due to several factors: 2014 was a two refueling outage year, and four unplanned maintenance outages also occurred in 2014. Additionally, infrequently performed activities including sump clean-outs, oil system replacement, and site building remodel waste materials contributed 24.7 tons to the site waste generation total.SB14 Category-B applicable hazardous waste generation rose by 3.72 tons (13%) from 27.78 tons in 2010 to 28.5 tons in 2014.Of the six SB 14 major waste groups identified for source reduction planning in the 2010 baseline year, routine waste generation for two of the six of the groups resulted in reductions during th~e 2014 reporting year. The following summarizes the maj or SB 14 waste stream comparisons from 2010 to 2014.Inorganic solid waste (CWC 181), a routine major SB 14 waste stream in 2010, decreased by 2.5 tons (66%) from 2010 to 2014 primarily due to decreased routine generation of spent sand blast media associated with equipment maintenance and coating activities.

Mor'e efficient and effective coating processes that have decreased the rate of Page 9 of 13 DIABLO CANYON POWER PLANT -SB14 PERFORMANCE REPORT (2014)ongoing metal corrosion has in-turn decreased the amount of existing coating materials that require removal and subsequent surface repair, and some newer equipment does not require periodic surface refinishing (stainless steel and aluminum surfaces).

Inorganic solids (CWC 181) are not a major SBl12 waste stream in 2014.Waste oil (CWC 221), a maj or SBl14 routine waste stream in 2010, rose by 6.75 tons or 103% in 2014. Routine equipment oil changeouts and sampling have generated a larger amount of waste oil due to several maintenance outages in this reporting period. Waste oil has again been identified as a major SB 14 waste for 2014 reporting.

Oil containing waste (CWC 223), a routine maj or SB 14 waste stream in 2010 rose by 1.05 tons in 2014 due increased maintenance outage periods. Oil containing waste has again been identified as a maj or SB 14 waste for the 2014 reporting year.Organic solids (CWC 352), a routine major SB 14 waste stream in 2010 increased 0.44 tons (28%) in the 2014 reporting year. Increased maintenance and coatings work from a multiple outage year is the cause of the increase.

Organic solids have again been identified as a maj or SB 14 waste for the 2014 reporting year.Paint sludge (CWC 461), a routine major SB14 waste stream in 2010 increased 0.56 tons (35%) in 2010.Increased maintenance and coatings work from a multiple outage year is the cause of the increase.

Regardless, extensive coatings and corrosion control efforts will continue at the facility, therefore, paint sludge has again been identified as a maj or SB 14 waste for 2014 reporting.

Facility Source Reduction Activities The following is an overview of past, present, and continuing source reduction and waste minimization activities conducted at the facility: Asbestos -suitable non-hazardous substitutes are used during asbestos replacement actions.RecyCling Activities

-waste oil, oily water, ftsed oil filters, solvents, mercury waste, fluorescent tubes, light ballasts, toner cartridges, lead-acid batteries, paint sludge and many other hazardous and/or industrial wastes.Chlorine Gas -use of sodium hypochlorite was implemented as an effective substitute.

Mercury Waste -this extremely hazardous waste has been eliminated from chemistry laboratory process waste streams through the replacement of Nessler' s Reagent (HgI 2) with specific ion electrode technology, the elimination of mercuric nitrate, and the use of Mercuric Thiocyanate, a less toxic alternative.

Chromated Water -the majority of chromate based corrosion inhibitors have been replaced with less hazardous molybdate based corrosion inhibitors.

Ammonium Hydroxide

-process chemical was replaced with less hazardous monoethanolamine (ETA).Page 10 of 13 DIABLO CANYON POWER PLANT -SB14 PERFORMANCE REPORT (2014)Oily Solids -Training based on job responsibilities has been previously implemented and continues to facilitate segregation of oil saturated materials from non-saturated materials.

New methods for reducing oily solid wastes are evaluated as they become available.

Paint Related Waste -a significant number of solvents, thinners and coatings have been eliminated from use, and suitable substitutes are now in use. Enhanced product inventory controls, and reduction in the generation of excess coating mixture preparations at individual job sites have been successful and continue to be implemented.

Solvents -the laundry dry cleaning and parts/tool cleaning units were discontinued at the facility.

This eliminated the generation of spent Freon, associated contaminated filters, contaminated solids, sludges and oils.Material Coatings -epoxy resin coatings are used only when absolutely necessary, and facility personnel continue to pursuing alternatives and substitutes for remaining epoxy applications as feasible.Acid/Caustic Debris Reductions

-continuous inspection and preventative maintenance of freshwater treatment ion exchange systems have reduced spills and necessity for clean-up of acids and caustics.Waste Oils -establishment of tighter controls and extending the time cycle of equipment overhauls has reduced waste oil generation.

Limited locations where lubricating oil drums are opened and stored, as well as limiting the number of containers open at any one time, also reduced off-specification and excess waste oil generation.

Aerosol Cans -increased employee awareness and recognizing employee waste reduction efforts reduced the generation of waste aerosol cans. A number of substitutes for aerosol cans (sprays/pumps) are presently in use.Empty and/or Damaged Drums -reused, recycled or" returned to vendors.Hazardous Waste Disposal -heavy duty, triple-walled paper boxes are used in place of 55 gallon steel drums for hazardous wastes that can be incinerated.

Each box can store the equivalent of four steel drums, and reduces overall use of packing materials and metal.Surplus Hazardous Materials

-made available to other facilities for use, rather than disposing of the materials as hazardous wastes.Hazardous Materials Inventory Control Program -The plant has continued to conduct and refine a program to review and control the procurement and distribution of hazardous materials.

All hazardous materials are reviewed for health, safety and environmental impacts prior to acquisition (DCPP Facility Procedure EV2.DC4).The program has increased inventory controls (only required materials are ordered), reduced the overall amount of material in inventory, and reduced disposal of materials (e.g. paint and resins) due to shelf life expiration.

Environmental Operations

-This plant organization provides guidance to facility administrative staff and field level workers on proper hazardous material and hazardous waste management, and promotes efforts for source reduction and waste minimization.

Employee Training Program -employees receive annual hazardous material and hazardous waste training at various levels depending on job requirements.

This training continuously improves awareness with regard to source reduction and waste minimization activities, new regulations, improved plan procedures and work guidance documents, and includes the following training modules:* Hazardous Waste Management

• Hazard Communication

• Hazardous Waste, Storage, Treatment and Manifesting

• Hazardous Waste Workplace Accumulation Areas and Transfer Locations* Chemical Awareness* Spill Response* Hazardous Materials Incident -Initial Response/Mitigation

• Asbestos Management Training Employee Recognition Program -Diablo Canyon Power Plant previously implemented an employee incentive program that provided rewards for ideas that benefited the plant (ideas included those that would promote source reduction and hazardous and extremely hazardous waste minimization).

Page 11 of 13 DIABLO CANYON POWER PLANT -SB14 PERFORMANCE REPORT (2014)Emergency Response Guidance, Spill Prevention Control and Countermeasure Plan -designed to protect human health and the environment.

Updating of these documents occurs as required by regulation.

The facility also maintains a Hazardous Waste Management Program and related procedures.

The SPCC plan includes routine equipment inspection to minimize the potential for materials leaks.Waste Management System -a hazardous waste management system, PG&E environmental compliance information tracking system (EIS-previous

& Enviance-current), and other databases are used at Diablo Canyon Power Plant to track hazardous waste management activities.

The systems allow the plant to access historic waste generation information and produce ongoing required waste management reports in a variety of formats.PG&E Utility Environmental Comimittees and Coordination Meetings -objectives include sharing and transferring of source reduction and waste minimization data and information.

Page 12 of 13 DIABLO CANYON POWER PLANT -SB14 PERFORMANCE REPORT (2014)6.0 CERTIFICATION Reference Section 6.8 of the DTSC Guidance Manual Technical Certification for the Performance Report I certify that this report meets the requirements of Title 22 California Code of Regulations (CCR) Section 67100. 13(d)( 1) regarding hazardous waste generation onsite, and offsite management of hazardous waste.Kenneth Cortese_________________

Chemistry and Environmental Manager Signature Pacific Gas & Electric Company_______________

Diablo Canyon Power Plant Date Financial Certification for the Performance Report I certify that this document and all attachments were prepared under my direction or supervision in accordance with a system designed to assure that qualified personnel properly gather and evaluate the information submitted.

Based on my inquiry of the person or persons who manage the system, or the persons directly responsible for gathering the information, the information submitted is, to the best of my knowledge and belief, true, accurate and complete.

I am aware that there are signi~icant penalties for making false statements or representations to the Department, including the possibility of fines for criminal violations.

Jan A. Nimick______________

Station Director Signature Pacific Gas & Electric Company _______________

Diablo Canyon Power Plant Date Page 13 of 13

DIABLO CANYON POWER PLANT -SB14 PLAN (2014)

1.0 INTRODUCTION

Routine waste generators of specified hazardous waste in excess of 12,000 kg/year (26,400 pounds)and/or extremely hazardous waste in excess of 12 kg/year (26.4 pounds) were required by Senate Bill 14 (SB 14), the Hazardous Waste Source Reduction and Management Review Act of 1989, Health and Safety Code Section 25244.12 et seq., to produce a Source Reduction Evaluation Review and Plan, and Performance Report, by September 1, 1991. Tn addition to development of the original "Plan" and"Report", generators are required to repeat this process every four years thr'ough the development of a Quadrennial Review and Planand Performance Report.Subsequent legislation, SB 1726 (Chapter 853 of the 1992 Statute), which amended and added sections to the Health and Safety Code, captured generators routinely producing over 5,000 kg (5.5 tons) of specified hazardous wastes and new generators in business since the passage of SB 14. The specified categories of hazardous waste include:* Any RCRA hazardous waste for which a federal treatment standard has not been adopted or for which EPA has granted a delay of the effective date;.0 A ny non-RCRA hazardous waste subj ect to treatment standards based upon incineration, solvent extraction, or biological treatment, and;*Any non-RCRA hazardous waste subj ect to the treatment standard adopted for non-RCRA.

metal-containing solid waste pursuant to Section 66268.1I06(a)(3) of Title 22 of the California Code of Regulations.

SB 1726 also required captured waste generators to proj ect a four-year numerical (percent) source reduction goal. For generators with completed SB 14 documents, the goal must be prepared with each Quadrennial Review and Plan. In addition, all waste generators must submit a biennial progress report (EPA Form GM, Waste Generation and Management) as part of the required biennial generator report (Title 22 of the California Code of Regulations).

The report must be completed by March 1 st of even numbered years. The numerical source reduction goal and biennial report are designed to support the original SB 14 goal of reducing the generation and release of hazardous waste to the environment by requiring documentation of hazardous waste management activities and source reduction options applicable to a generator's waste streams.Additional legislation, SBI 1133, amended SB 14 by requiring inclusion of hazardous waste waters generated on-site in the SB 14 calculations and in the review of source reduction options. SB 1133 requires generators of hazardous waste waters, whether treated on-site or off-site, to include these Page 1 of 16 DIABLO CANYON POWER PLANT -SB14 PLAN (2014)volumes in the initial SB 14 tabulation, regardless of ultimate disposition.

If the included waste water is a SBl14 major waste stream (more than 5% of the total SBl14 waste), then applicable source reduction measures are to be evaluated.

In addition, the waste water volume is then removed from the original SB 14 calculation, and a new calculation is made to determine all other SBI14 major wastes.The Diablo Canyon Power Plant completed the original Source Reduction Review and Plan and Performance Report by September 1, 1991 (baseline year = 1990), and submitted the subsequent Biennial Progress Report (1993 data) on March 1, 1994. In addition, an SB 14 Status Report was produced in 1994. Quadrennial source reduction evaluation reviews and plans were produced in 1995 (1994 data), 1999 (1998 data), 2003 (2002 data), 2007 (2006 data), and 2011 (2010 data). This document, and the Quadrennial Performance Report -2014 Reporting Year, for the Diablo Canyon Power Plant, provides the following information and data:* Facility information

• Site description

• Hazardous and extremely hazardous waste generation

• Source reduction measures and evaluations applicable to SB 14 waste streams* Implementation schedule for selected source reduction options* Numerical hazardous waste r~eduction goal Additional companion documents to this Review and Plan, prepared by September 1, 2015, include:* Quadrennial Performance Report -2014 Reporting Year* Quadrennial Summamy Progress Report (SPR) -2014 Reporting Year Page 2 of 16 DIABLO CANYON POWER PLANT -SB14 PLAN (2014)2.0 FACILITY INFORMATION Reference Section 5.2 of the DTSC Guidance Manual Facility Name: Diablo Canyon Power Plant Pacific Gas & Electric Company Address / Location:

9 Miles North West of Avila Beach, CA P.O. Box 56 Avila Beach, CA, 93424 Telephone:

(805) 545-3607 Trevor D. Rebel, Senior Environmental Coordinator EPA ID#: CAD 077 966 349 SIC Code: 4911 Type of Business:

Electrical Generation, Nuclear Steam Power Plant Facility Operational:

1984 Number of Employees:

1,350 (estimated)

Page 3 of 16 DIABLO CANYON POWER PLANT -SB14 PLAN (2014)3.0 SITE DESCRIPTION AND WASTE GENERATION Reference Sections 5.2 through 5.5 of the DTSC Guidance Manual The Diablo Canyon Power Plant, operated by Pacific Gas and Electric Company, is located nine miles northwest of Avila Beach, California.

The plant produces electrical energy using two nuclear powered generation units (Unit 1 rated at 1153 MWe; and, Unit 2 rated at 1182 MWe [ turbine generator nameplate ratings ]). The facility has a total nameplate rating generating capacity of 2335 MWe.During the electrical generation process and associated power plant maintenance activities, a variety of routine hazardous wastes are generated.

Generation of non-routine waste increases during scheduled plant maintenance outages as well as during unscheduled forced maintenance outages. The following sections present a description of the four maj or SB 14 waste streams generated at Diablo Canyon Power Plant in 2014 (waste oil, oil containing waste, organic solids, and paint sludge), and other generated hazardous wastes. Reference Table- 1 and Figure 1.3.1 Waste Oil (CWC 221)Waste oil fi'om routine operations was a major SB 14 waste with -13.28 tons representing 46.6% of total SB 14 waste generation (Table 1; Figure 1). Waste oils consisted primarily of spent rotating equipment lubrication oil, used diesel generator lubrication oil, and machinery gear oil generated from routine lubrication oil reservoir replenishment or change-out, and off-specification warehouse stock disposal.

As a result of continued frequent preventative maintenance processes at the facility, routine waste oil generation fr'om plant equipment operations has remained elevated and relatively stable on an annual basis subsequent to the 2002 SB 14 reporting year. Therefore, the waste stream remained a major Category-B source (previous to 2002, the waste stream was not designated a major SB 14 source).Waste oil is recycled at off-site facilities either through reprocessing or use as fuel.3.2 Oil Containing Waste (CWC 223)During 2014 oil containing waste was a maj or SB 14 waste representing 7.46 tons, or 26.17 % of the total SB 14 waste generated (Table 1; Figure 1). Oil containing wastes consisted primarily of adsorbents, mats, rags, pads, plastic containers, and miscellaneous materials generated during routine maintenance.

Another source of oil containing waste was generated from periodic cleanup involving vehicles, machinery, heavy equipment, transformer maintenance, shop activities, and power plant equipment leaks.This waste stream increased by 1.05 tons (16 %) from the 2010 reporting year. The increase in generation is from the site having two refueling outages and several planned maintenance outages during Page 4 of 16 DIABLO CANYON POWER PLANT -SB14 PLAN (2014)the 2014 reporting year. Oil contaminated materials are either incinerated or land-filled (metal filters and clay absorbents) at off-site facilities.

3.3 Organic

Solids (CWC 352)The generation of organic solids in 2014 was 2.04 tons (Table 1; Figure 1) or 7.16 % of the total SB 14 waste.Organic solids consisted mainly of surface coatings related paint and solvent contaminated personal protective equipment (PPE), cloth rags, paper, tap, and plastics that were generated during ongoing coatings repair and maintenance associated with corrosion control of metal plant equipment and buildings.

In 2014, organic solids generation increased 0.44 tons (27 %) from the 2010 reporting year. Organic solid wastes are recycled as fuel grade materials at off-site facilities.

3.4 Paint

Sludge (CWC 461)Paint sludge comprised 7.58 % or 2.16 tons of SBl14 waste in 2014. The paint sludge was generated from cleanup, off-specification materials, unused paint residual from individual coatings maintenance work, and expired shelf-life paint surpluses from warehouse stock. The generation of paint sludge in 2010 increased by 0.56 tons (35%) from the 2010 reporting year due to several maintenance outages in 2014. Paint sludge is recycled as fuel grade materials at off-site facilities.

Page 5 of 16 DIABLO CANYON POWER PLANT -SB14 PLAN (2014)Table 1. Total Hazardous Waste Generated and SB-14 Classification of Wastes Diablo Canyon Power Plant (Tons) -2014.CWC Waste Description Quantity Class* SB14 Hazardous (tons) Waste %123 Unspecified Alkaline Solution 0.0 18 R 0.06 1 132 Aqueous Solutions with Metals 0.215 R 0.753 133 Aqueous Solution (organic residue > 10%) 0.2 10 X 141 Off-Specification Aged or" Su'plus Inorganics 0.022 R 0.08 151 Asbestos 3.14 X 181 Inorganic Solid Waste 1.29 R 4.53 221 Waste Oil 13.28 R 46.6 223 Oil Containing Wastes 7.46 R 26.17 223 Oil Containing Wastes 10.40 N 261 Polychlorinated Biphenyls (PCBs) 0.17 X 281 Adhesives 0.24 R 0.85 291 Latex Waste 0.21 R 0.75 331 Off-Specification Aged or Surplus Organics 0.08 R 0.27 342 Organic Liquids with Metals .005 R 0.02 343 Organic Liquid Mixture .0.96 R 3.36 352 Organic Solids 2.04 R 7.16 461 Paint Sludge 2.16 R 7.58 551 Laboratory Waste Chemicals

.058 R 0.20 611 Contaminated Soil 0.27 R 0.94 725 Liquids with Mercury =>20 mg/I .003 R 0.01I 741 Halogenated Organics >1000 mg/1 0.12 R 0.40 792 Chromate Waste Water 0.077 R 0.27 Total Site Hazardous Waste Generation (Tons,) 56.74 Total SBI]4 Applicable Waste Generation (Tons) 28.50 Total SB14 Major Categoty-B Wastes (Tons) 24.94 ____Class * (Waste Type and Generation Frequency):

• R -defines wastes that are routinely generated dur'ing facility operations.

• X -defines wastes exempted from SB 14 consideration.

• N -defines wastes that are not generated from routine processes at the facility.* All wastes listed are Hazardous Wastes in accordance with Title 22 CCR Bold Text Denotes SB14 Major Category-B Wastes (5% or > Total SB14 Wastes)Page 6 of 16 DIABLO CANYON POWER PLANT -SB14 PLAN (2014)SB14 Waste Generation at Diablo Canyon Power Plant -2014* OtlaeSBl4Wastes 12.5%g Paint Sludge 7.6%o Organic$olids) 7.2%n Waste Oil 46.6%* 011 Contaanig Waste 26.2%/Figure 1. SB14 Waste Generation at Diablo Canyon Power Plant (DCPP) during 2014.Waste Oil (CWC 221)* Spent Turbine Oil, Gear Oil* Miscellaneous Petroleum Oil Lubricants 13.28 tons (total)Oil Containing Waste (CWC 223)0 0 Adsorbents, Mats, Rags, Pads Miscellaneous Oil Contaminated Materials 7.46 tons (total)Organic Solids (CWC 352)* Painting and Coating Related Solids 2.04 tons (total)Paint Sludge (CWC 461)0 0 0 Unused Mixed Paint and Solvent Off Specification Aged Paint Paint No Longer Used at the Facility 2.16 tons (total)Figure 2. Components of Major Category-B SB14 Waste Streams Generated at DCPP 2014 Page 7 of 16 DIABLO CANYON POWER PLANT -SBI4 PLAN (2014)3.6 Other Generated SB14 Wastes and Non SB14 Wastes A number of other Category-B wastes were generated at Diablo Canyon Power Plant during 2014, represented as "other SB 14 waste" in Figure-i comprising 3.56 tons or 12.5% of SB 14 waste generation.

These wastes were generated during routine plant maintenance and equipment overhaul activities, or resulted from surplus and disposal of off-specification materials stock. The contributing wastes and associated volumes are itemized in Table-i.Other minor Category-B SBl14 wastes generated during 2010 accounted for 3.56 tons and included: unspecified alkaline solutions (CWC 123); aqueous solutions with metals (CWC 132); aqueous solutions with organic residues > 10% (CWC 133); off-specification, aged, or surplus inorganics (CWC 141);Inorganic Solid Waste (CWC 181); off-specification, aged, or surplus adhesives (CWC 281); latex paint wastes (CWC 291); off-specification, aged, or surplus organics (CWC 331); organic liquids with metals (CWC 342); Organic Liquid Mixtures (CWC 343); laboratory waste chemicals (CWC 551);contaminated soil (CWC 611); liquids with mercury => 20 ppm (CWC 725), and halogenated organics (CWC 741); liquids with pH < 2 (CWC 792).Wastes exempt from SB 14 consideration were also generated at Diablo Canyon Power Plant during 2014.These SB 14 exempt and/or non-routine generated wastes totaled 28.25 tons (49.8% of total site waste generation) and included:

ethylene glycol (antifreeze) from vehicles (CWC 133); friable asbestos -SB14 exempted waste stream (CWC 151); infrequent oil equipment change out (CWC 221); oil containing ballast from an infrequent building remodels (CWC 223); oil containing waste water -non-routine waste oil generated from infrequent sump cleanout; polychiorinated biphenyl articles -SB14 exempted waste stream (CWC 261); latex paint waste (CWC 291) from very infrequent building remodels.Page 8 of 1 6 DIABLO CANYON POWER PLANT -SB14 PLAN (2014)4.0 SOURCE REDUCTION MEASURES AND EVALUATION OF SOURCE REDUCTION OPTIONS Reference Sections 5. 6, thru 5.9 of the DTSC Guidance Manual This section presents an evaluation of viable source reduction measures for each SB 14 waste stream.The following approaches were used to determine viable source reduction measures waste category: Material Input Changes Operational Improvements Production Process Changes Product Reformulation Administrative Steps -Inventory Control Employee Award Programs Employee Training In-House Policies and Guidance Corporate/Management Commitment Other Programs or Measures The following factors were evaluated for each measure!Expected Change in the Amount of Hazardous Waste Generated

-Technical Feasibility Economic Evaluation Capital Cost, Operating Cost, and Generated Waste Management Cost Retumn on Investment (ROI) or Other Economic Comparison Method Effects on Product Quality Employee Health and Safety Implications Permits, Variances, and Regulatory Compliance Schedules Applicable Local, State, or Federal Agency Requirements or Guidelines Releases and Discharges Generally, measures other than those discussed below for each specific major Category-B waste stream are not considered viable potential source reduction measures.

As other measures are identified, they will be considered and evaluated for potential feasibility, and a determination made as to whether or not the measure could also contribute to source reduction and waste minimization.

4.1 Waste

Oil (CWC 221)Source: Spent rotating equipment lubrication oil, diesel generator lubrication oil, and machinery gear oil generated from oil reservoir change-out.

Off-specification partially used containers of product and/or shelf-life expiration of materials.

Based on historical performance, the facility has likely reached a baseline of lubricating oil wastes.Source Reduction Approaches:

Increase inventory control of warehouse product oil. Efforts for reduction may include: Page 9 of 16 DIABLO CANYON POWER PLANT -SB14 PLAN (2014)*Improve material control by insuring surplus fresh oil from specific maintenance activities is returned to material stock for re-issue.*Improve employee awareness to promote source reduction and waste minimization through various mechanisms such as: 0 Training (computer based training -CBT, classroom, and on-the-job), SInformal field discussion, SWritten guidance, and 0Communication by various levels of management such as supervisor tailboard sessions with field employees.

Expected Change in the Amount of Generated Hazardous Waste: Based on the consideration factors, it is anticipated that overall reductions in routine non-outage spent or off-specification oil generation of approximately 1% may be achieved.

Generation of the waste stream is primarily driven by equipment maintenance requirements, and not discretionaliy processes.

4.2 Oil Containing Waste (CWC 223)Source: Routine equipment maintenance and cleanup using adsorbents, mats, rags, and pads.Source Reduction Approaches:

Continue efforts that have resulted in significant reductions of oil containing waste.These efforts include the following:

• Preventative maintenance of equipment, where feasible, to reduce the incidence of oil-leaks during operation.

• Evaluate rate of existing leaks and provide/place appropriately scaled volumes of absorbent materials to reduce leak control and cleanup waste generation.

• Routine inspection programs implementation such as the Spill Prevention Control and Countermeasures (SPCC) Plan inspections intended to proactively detect and evaluate equipment corrosion or other damage. Routine inspections facilitate elimination of leaks from oil filled storage and operating equipment.

• Improve employee awareness to promote source reduction and waste minimization through various mechanisms such as: 0Training (computer based training -CBT, classroom, and on-the-job), 0) Informal field discussion, 0Written guidance, and Page 10 of 16 DIABLO CANYON POWER PLANT -SB14 PLAN (2014)<)Communication by various levels of management such as supervisor and field foreman tailboard training sessions.*Continue to use sorting and consolidation to separate reusable materials, non-hazardous materials, and minimize overall oil contaminated waste volume.Expected Change in the Amount of Generated Hazardous Waste: Even with anticipated variation in routine plant practices and plant operations, ongoing reductions of approximately 3% are achievable for this waste stream. This reduction would come from continued improvement of waste minimization from all contributing sources including routine operation and maintenance of oil containing systems and equipment.

4.3 Organic

Solids (CWC 352)Source: Painting activities associated with plant equipment surface protection and corrosion inhibition effortcs.

Corrosion control related work scope resulted in significant generation of paint and solvent contaminated solids (organic solids) during 2014. Significant facility surface coating maintenance and replacement will continue due to the harsh (moist air and salt contamination) coastal environment of the location.

However, continued source reduction efforts are expected to result in less process related waste generated during the next reporting period.Source Reduction Approaches:

Continue hazardous materials inventory reduction efforts, and implement process improvements to equipment maintenance.

These efforts for reductions and process improvements include:* Consider replacing equipment used for painting, as is feasible, with more efficient devices as they become available.

• Reduction in quantity and variety of painting and coatings equipment in-use.* As they become available, replace in-use industry products with substitutes that are both environmentally superior and meet specific standards necessary for surface application and durability.

• As feasible, continue to substitute certain aerosol products with bulk coating materials that can be applied with methods that use less overall product volume, and that create lower volumes of off-specification or unused prepared/mixed material.* Improve employee awareness to promote source reduction and waste minimization through various mechanisms such as:<) Training (computer based training -CBT, classroom, and on-the-job), SInformal field discussion,<5 Written guidance, and Pagell1ofl6 DIABLO CANYON POWER PLANT -SB14 PLAN (2014) by various levels of management such as supervisor and field foreman tailboard training sessions.*Continue to use sorting and consolidation to separate reusable materials, non-hazardous materials, and minimize overall paint contaminated waste volume.*Procure surface coatings materials in appropriately sized containers for individual planned/scheduled j obs, e.g. purchase one 5-gallon container of product verse using five 1-gallons containers.

Expected Change in the Amount of Generated Hazardous Waste: Based on the consideration factors, it is expected that further reductions of approximately 3% may be achieved for this waste stream ongoing. Even with variations in contributing work activities, overall reduction should result from continued improvement of waste minimization from all contributing sources related to painting and coating work activities at the field level.4.5 Paint Sludge (CWC 461)Source: Painting activities associated with plant equipment and building corrosion protection efforts.Corrosion control activities to protect plant structures and equipment in the harsh coastal environment of the facility were conducted throughout 2014, and will continue as a significant routine plant process. However, further improvements in painting and coating materials stock inventory control are achievable.

Previous significant reductions in the generation of off-specification waste paint sludge can be attributed to successful source reduction efforts, primarily improved field level practices associated with coatings preparation, and improved product inventory management.

Continued improvements in these same source reduction efforts are expected to result in less waste generated during the next reporting period.Source Reduction Approaches:

Continue hazardous materials inventory reductions and process improvement to field level painting activities.

These efforts for reductions and process improvement include:* Consider replacing equipment used for painting as is feasible with more efficient devices as they become available.

• Continue to ensure only the volumes of paint necessaiy to complete a specific coatings task are mixed/prepared prior to implementing work.* Paint inventory minimization to reduce/eliminate expiration of stored materials.

• Reduction in quantity and variety of paints and surface coatings used at the facility.* Replace specific products with substitutes that are both environmentally superior and meet specific standards necessary for product application, as they become available.

• Improve employee awareness to promote source reduction and waste minimization through various mechanisms such as:<? Training (computer based training -CBT, classroom, and on-the-job), Page 12 of 16 DIABLO CANYON POWER PLANT -SB14 PLAN (2014)0Informal field discussion, 0 Written guidance, and 0 Communication by various levels of management such as supervisor and field foreman tailboard training sessions.*Continue to use sorting and consolidation to separate reusable material and minimize overall waste generated.

Expected Change in the Amount of Generated Hazardous Waste: Based on the consideration factors, it is expected that further reductions of approximately 3% are achievable for this waste stream ongoing. Even with variations in contributing work activities, reduction should result from continued improvement in waste minimization from all contributing sources involved including materials inventory management and surface coating related work activities at the field level.Page 13 of 16 DIABLO CANYON POWER PLANT -SBl4 PLAN (2014)5.0 IMPLEMENTATION SCHEDULE Reference Section 5.10 of the DTSC Guidance Manual Review of source reduction measures available provides a variety of ongoing' recommendations with potential to achieve further reductions in overall waste generation.

These recommendations are dependent on the primary waste sources and related plant processes contributing to individual waste streams (Section 4.0). A summary of proposed source reduction measure implementation to achieve the target reductions ongoing for each waste stream are presented in the following table.Table 2. Summary of Proposed Actions Associated with Source Reduction Measures.CWC Waste Source Reduction Measure -Implementation 221 Waste Oil As described in Section 4.0 9/20 16 223 Oil Containing Waste As described in Section 4.0 9/2016, 352 Organic Solids As described in Section 4.0 6/20 16 461 Paint Sludge As described in Section 4.0 812016 Page 14 of .16 DIABLO CANYON POWER PLANT -SB14 PLAN (2014)6.0 HAZARDOUS WASTE REDUCTION NUMERICAL GOAL Reference Section 5.11 of the DTSC Guidance Manual Hazardous waste generators are required, by SB 1726, to develop a four-year numerical (percent) source reduction goal in the first Quadrennial Review and Plan, and every Quadrennial Review and Plan thereafter.

For Diablo Canyon Power Plant, establishing the source reduction goal from 2014 baseline generation has inherent uncertainty due to ongoing changes in facility operations and unpredictable variations in overall electric generation business activities within California.

Even with inherent uncertainty in future plant operations; a 5% reduction in overall SB 14 hazardous waste generation fr'om current reporting year levels (2014) is reasonably achievable.

This numerical goal was established with consideration of the potential impacts of scheduled capital improvement projects, potential for changes in routine electric generation operations of Diablo Canyon Power Plant, potential for increased routine scheduled plant maintenance or forced maintenance outages, and the inherent uncertainty of overall electric generation supply operations.

The 5% numerical goal, equivalent to 1.42 tons of routine SB 14 applicable waste generation, is based on the following source reduction projection:

Total Weight of SB 14 Waste (Hazardous and Extremely Hazardous Waste) Generation Reduced at the Site by Optimizing Source Reduction Practices.

x 100 Total Weight of SB 14 Waste (Hazardous and Extremely Hazardous Waste) Generation if Source Reduction Measures Not Implemented.

or (1.42 tons / 28.4963 tons) X 100 = 5.0%Page 15 of 16 DIABLO CANYON POWER PLANT -SB14 PLAN (2014)7.0 CERTIFICATION Reference Section 5.12 of the DTSC Guidance Manual Technical Certification for the Review and Plan I certify that the review and plan meets the requirements of 22CCR § 67100.13(b)(1) through 67100.13 (b)(4)regarding the identification of routinely generated maj or hazardous waste streams, source reduction approaches, feasible and economically practicable reduction measures, and avoiding practices that would increase emission or discharges to air, water, or land.Kenneth Cortese _______________

Chemistry and Environmental Manager Signature Pacific Gas & Electric Company ______________

Diablo Canyon Power Plant Date Financial Certification for the Review and Plan I certify that this document and all attachments were prepared under my direction or supervision in accordance with a system designed to assure that qualified personnel properly gather and evaluate the information submitted.

Based on my inquity of the person or persons who manage the system, or the persons directly responsible for gathering the information, the information submitted is, to the best of my knowledge and belief, true, accurate and complete.

I am aware that there are significant penalties for making false statements or representations to the Department, including the possibility of fines for criminal violations.

Jan A. Nimick________________

Station Director Signature Pacific Gas & Electric Company ______________

Diablo Canyon Power Plant Date Page 16 of 16 120 DCPP Hazardous Waste Volume Trends 1994-2014 100 I Aggregate Haz Waste Volume in Tons -St ate SB14 Quadrennial Reporting Years* Total Site HazWaste* SB14 Waste Streams 80 1--Note: 2014 SB14 Reporting Year Included 2 Scheduled Unit Re-Fueling Outages & 4 Forced Unit Outages.60 1 40 I--20I--0 1994 1998 191982002 200620004 2010 2014 F z DIABLO CANYON POWER PLANT -SB14 PERFORMANCE REPORT (2010)1.0 DNTRODUJCTION Routine waste generators of specified hazardous waste in excess of 12,000 kg/year (26,400 pounds) and/or extremely hazardous waste in excess of 12 kg/year (26.4 pounds) were required by Senate Bill 14 (SB 14), the Hazardous Waste Source Reduction and Management Review Act of 1989, Health and Safety Code Section 25244.12 et seq., to produce a Source Reduction Evaluation Review and Plan, and Performance Report, by September 1, 1991. In addition to development of the original "Plan" and "Report", generators are required to repeat this process every four years through the development of a Quadrennial Review and Plan and Performance Report.Subsequent legislation, SB 1726 (Chapter 853 of the 1992 Statute), which amended and added Sections to the Health and Safety Code, captured generators routinely producing over 5,000 kg (5.5 tons) of specified hazardous wastes and new generators in business since the passage of SB 14. The specified categories of hazardous waste, which primarily impact generators of aqueous and solid organic compounds, polychlorinated biphenyls (PCB s), and metal-containing solid waste, include:* Any RCRA hazardous waste for which a federal treatment standard has not been adopted or for which EPA has granted a delay of the effective date;* Any non-RCRA hazardous waste subject to treatment standards based upon incineration, solvent extraction or biological treatment, and;* Any non-RCRA hazardous waste subject to the treatment standard adopted for non-RCRA metal-containing solid waste pursuant to Section 66268.106(a)(3) of Title 22 of the California Code of Regulations.

SB 1726 also requires captured generators to proj ect a four-year numerical (percent) source reduction goal. For generators with completed SB 14 documents, the goal must be submitted with each Quadrennial Review and Plan.In addition, all generators must submit a biennial progress report (EPA Form GM, Waste Generation and Management) as part of the required biennial generator report (Title 22 of the California Code of Regulations).

The report must be completed by March 1 St of even numbered years. The numerical source reduction goal and biennial report are designed to support the original SB 14 goal of reducing the generation and release of hazardous waste to the environment by requiring documentation of hazardous waste management activities and source reduction options applicable to a generator's waste streams.Additional legislation, SB 1133, amended SB 14 by requiring inclusion of hazardous waste waters generated on-site in the SB 14 calculations and in the review of source reduction options. SB 1133 requires generators of hazardous waste waters, whether treated on-site or off-site, to include these volumes in the initial SB 14 Page 1 of 13 DIABLO CANYON POWER PLANT -SB14 PERFORMANCE REPORT (2010)tabulation, regardless of ultimate disposition.

If the included waste water is a SB 14 maj or waste' stream (more than 5% of the total SB 14 waste), then applicable source reduction measures are to be evaluated.

In addition, the waste water volume is then removed from the original SB 14 calculation, and a new calculation is made to determine all other SB 14 maj or wastes.The Diablo Canyon Power Plant completed the original Source Reduction Review and Plan and Performance Report by September 1, 1991 (baseline year = 1990), and submitited the subsequent Biennial Progress Report (1993 data) on March 1, 1994. In addition, an SB14 Status Report was produced in 1994. Quadrennial source reduction evaluation reviews and plans were produced in 1995 (1994 data), 1999 (1998 data), and 2003 (2002 data), and 2007 (2006 data). This document, and the Quadrennial Source Reduction Evaluation Review and Plan-2010 Reporting Year, for the Diablo Canyon Power Plant, provides the following information and facility waste generation data:* Facility information

• Site description

• Waste generation

• Current waste management practices* Results of past waste management practices Additional companion documents to this Performance Report, prepared by September 1, 2011, include:* Quadrennial Summary Progress Report (SPR) -2010 Reporting Year* Quadrennial Source Reduction Evaluation Review and Plan -2010 Reporting Year 2.0 FACILITY INFORMATION Reference Section 6. 2 of the DTSC Guidance Manual Facility Name: Diablo Canyon Power Plant (DCPP)Pacific Gas & Electric Company Address: 9 Miles NorthWest of Avila Beach P.O. Box 56 Avila Beach, California, 93424 Telephone:

(805) 545-3607 Trevor Rebel, Senior Environmental Coordinator EPA ID#: CAD077966349 SIC Code: 4911 Type of 1Business:

Electrical Generation, Nuclear Steam Power Plant Facility Operational:

1984 Number of Employees:

1,300 (estimated)

Page 2 of 13 DIABLO CANYON POWER PLANT -SB14 PERFORMANCE REPORT (2010)3.0 SITE DESCRIPTION AND ELECTRICAL GENERATION Referenced Section 6.2 of the DTSC Guidance Manual The Diablo Canyon Power Plant, operated by Pacific Gas and Electric Company, is located nine miles northwest of Avila Beach, California.

The plant produces electrical energy using two nuclear powered generation units (Unit 1 rated at 1,153 Megawatts Electric MWe; and, Unit 2 rated at 1, 182 MWe [turbine generator nameplate ratings]).

The facility has a total namePlate generation rating capacity of 2,335 MWe.Table 1. Megawatt-Hour (MWe-hr.)

Net Generation at Diablo Canyon PowerPlant, 2006 and 2010.2006 2010 Unit 1 9,944,983 8,698,083 IUnit 2 8,520,000 9,815,586 Total 18,464,983 18,513,669 The plant output, or electrical production at Diablo Canyon Power Plant, is measured as megawatt-hour generation (MWe-hr).

During 2006, the total generation was 18,464,983 megawatt-hours, while during the 2010 reporting year generation was 18,513,669 megawatt-hours (Table 1). Total facility generation increased from 2006 to 2010 due to improvements in maintenance outage duration performance and capital improvement proj ects (steam generator and reactor head replacement).

Output ratings and generation figures, as shown above, are derived from PG&E DCPP Plant Operations Statistics for 2006 and 2010.4.0 WASTE GENERATION AND MANAGEMENT PRACTICES Reference Sections 6.3 through 6.5 of the DTSC Guidance Manual During the electrical generation process and associated power plant maintenance activities, a variety of hazardous wastes are generated.

Major power plant reactor re-fueling outages are scheduled to conduct overhaul activities, which increase the generation of non-routine hazardous wastes. Unscheduled forced maintenance outages may also impact total site waste generation volumes. The following section presents a description of the six major SB 14 waste streams generated at Diablo Canyon Power Plant during the 2006 and 2010 reporting years.In 2006, the baseline comparison year for this report, 46.78 tons of total hazardous waste, including 32.21 tons of non-exempted routine SB 14 waste, was generated at Diablo Canyon. The five major Category-B SB 14 waste streams in 2006 totaled 27.78 tons and comprised 59.39% of overall facility hazardous waste generation.

In page 3 of 13 DIABLO CANYON POWER PLANT -SB14 PERFORMANCE REPORT (2010)2010, 48.13 tons of total hazardous waste, including 24.78 tons of non-exempted routine SB 14 waste, was generated.

The six maj or Category-B SB 14 waste streams in 2010 totaled 22.2 tons, and comprised 46.13% of overall facility hazardous waste generation.

2006 facility major Category-B SB 14 wastes are summarized in the following table (Table 2): 1. Inorganic Solid Waste (CWC 181) =3.79 tons 2. Waste Oil (CWC 221) = 6.53 tons 3. Oil Containing Waste (CWC 223) = 6.41 tons 4. Organic Solids (CWC 352) =1.6 tons 5. Paint sludge (CWC 461) = 1.6 tons Table 2. Maj or Category-B SB 14 Waste Streams for DCPP 2010.CWC = California Waste Code Other minor Category-B SB 14 wastes generated during 2010 accounted for 2.58 tons and included: alkaline solutions without metals (CWC 122); unspecified alkaline solutions (CWC 123); aqueous solutions with metals (CWC 132); aqueous solutions with organic residues <10% (CWC 134);unspecified aqueous solutions (CWC 135); off-specification, aged, or surplus inorganics (CWC 141);hydrocarbon solvents (CWC 213); PCB contaminated materials and debris (CWC 261); off-specification, aged, or surplus adhesives (CWC 281); latex paint wastes (CWC 291); off-specification, aged, or surplus organics (CWC 331); organic liquids with metals (CWC 342); laboratory waste chemicals (CWC 551); contaminated soil (CWC 611); liquids with mercury => 20 ppm (CWC 725), and halogenated organics (CWC 741).Page 4 of 13 DIABLO CANYON POWER PLANT -SB14 PERFORMANCE REPORT (2019)Table 3. Hazardous Waste Generated at Diablo Canyon Power Plant -2006 and 2010____ HaaduWstGeetin2006 2010 CWC Waste Stream Description Tons SB14 Tons SB14____________________________

______Waste

% Waste %122 Alkaline Solution without Metals pH=> 12.5 0.07 0.22 122

• Alkaline Solution without Metals pH=> 12.5 1.33 123 Unspecified Alkaline Solution 0.019 0.06 0.02 0.09 132 Aqueous Solutions with Metals 0.0 17 0.05 0.22 0.88 134 Aqueous Solution (Organic Residue < 10%) 0.17 0.53 0.28 1.12 135 Unspecified Aqueous Solution _____ 0.17 0.69 141 Off-Specification, Aged, or Surplus Inorganics 0.18 0.56 0.21 0.83 151

• Asbestos 0.26 _____ 0.19 181 Inorganic Solid Waste 6.67 20.72 3.79 15.30 213 Hydrocarbon Solvents 0.10 0.30 0.07 0.30 221

• Waste Oil 12.44 221 Waste Oil 6.52 20.23 6.53 26.36 223

• Oil Containing Waste 22.2 223 Oil Containing Waste 8.77 27.22 6.41 25.85 261

• Polychlorinated Biphenyls (PCBs) 0.10 0.30 261 PCB Contaminated Materials 0.64 2.00 0.01 0.05 281 Adhesives 0.36 1.13 0.10 0.41 291 Latex Waste 0.29 0.89 0.07 0.29 331 Off-Specification, Aged, or Surplus Organics 1.14 3.54 0.32 1.28 342 Organic Liquids with Metals 0.03 0.10 343 Organic Liquid Mixture 0.92 2.85 2.27 9.17 352 Organic Solids 3.48 10.82 1.60 6.47 461 Paint Sludge 2.34 7.25 1.60 6.45 491

• Unspecified Sludge Waste 0.21 0.68 551 Laboratory Waste Chemicals 0.01 0.03 611 Contaminated Soil 0.14 0.42 0.99 4.00 725 Liquids with Mercury =>20 mg/I 0.004 0.01 0.01 0.02 741 Halogenated Organics > 1000 mg/1 0.04 0.14 0.08 0.32 792

• Liquids with pH =< 2.0 with Metals 0.23 _________

____Total Site Hazardous Waste Generation (Tons) .... .46.78 ....... 48.13 TtlS4AplabeWs Generation (Tons) 32.21 24.78 .... ...Total. 51MaoCaeoyBWse(on)27.78

....__ 22.20 ____Data Source for Baseline Year Data (2006): Source Reduction Evaluation Review and Plan and Source Reduction Performance Report Diablo Canyon Power Plant 2006 Reporting Year* Indicates waste generated on a non-routine basis, or waste exempt from SB 14 consideration.

Bold Print represents a major SB 14 waste category (>5% of total SB 14 wastes) in 2006 and/or 2010 reporting year.Page 5 of 13 DIABLO CANYON POWER PLANT -SBI4 PERFORMANCE REPORT (2010)Total Waste Generation and SB14 Waste Catagories at Diablo Canyon Power Plant -2006* Non-Routine and SB 14 Exempt Wastes 31.1%U Other SB14 Wastes 9.5%* Inorganic Solid Wastes 14.3%P13.9%0] Oil Containing Waste 18. 7%* Paint Sludge [] Organic Solids 5.0% 7.4%Figure 1. Total Waste Generation at Diablo Canyon Power Plant (DCPP) during 2006.Total Waste Generation and SB14 Waste Catagories at Diablo Canyon Power Plant -2010* Inorganic Solid Wastes 7.9%[] Non-Routine and SB-14 Exempt Wastes 48.5%* Waste Oil 13.6%Waste 13.3%[] Organic Liquid Mixture 4. 7%* Organic Solids 3.3%* Other 5B14 Wastes U Paint Sludge 5.4% 3.3%Figure 2. Total Waste Generation at Diablo Canyon Power Plant (DCPP) during 2010.Page 6 of 13 DIABLO CANYON POWER PLANT -SBI4 PERFORMANCE REPORT (2010)SB14 Waste Generation at Diabio Canyon Power Plant -2010 U Other SBl4 Wastes U Inorganic Solid 10.4% Wastes U Paint Sludge153 U Organic Solids 6.5%*U Waste Oil 26.4%[] Organic Liquid Mixture 10 Oil Containing

9. 2% Waste 25.9%Figure 3. SB 14 Waste Generation at Diablo Canyon Power Plant (DCPP) during 2010.During the 2010 reporting year, 48.13 tons of total hazardous waste, and 24.78 tons of non-exempted routine Category-B SB 14 wastes were generated at DCPP. The following paragraphs discuss the six major SB814 waste streams generated at DCPP during the 2010 reporting year (inorganic solid waste, waste oil, oil containing waste, organic liquid mixtures, organic solids, and paint sludge) and other generated hazardous wastes.In accordance with SB 14 definitions, "aqueous waste" refers to a hazardous waste stream processed in a wastewater treatment unit which discharges to a POTW or discharges to receiving waters under a National Pollution Discharge Elimination Systems (NPDES) Permit (reference December 2010 DTSC Guidance Manual for SB14). DCPP operates a once-through-cooling water system under an NPDES permit. The only aqueous waste streams that are treated prior to discharge under the facility NPDES Permit do not exhibit hazardous characteristics prior to treatment.

Therefore, all waste streams identified and described in the following report section are categorized as non-aqueous Category-B wastes according to the DTSC SB 14 Guidance Manual definitions.

4.1 Inorganic

Solid Waste (CWC 181)During 2010, inorganic solid waste was a major 5B14 waste with 3.79 tons generated.

This represented 15.3 %of the total SB 14 waste generation at Diablo Canyon Power Plant (Table 2; Figure 3). Inorganic solid wastes decreased by 2.9 tons, or 43.2 % from, the 2006 reporting year. This waste category was composed of the following:

abrasive blast media waste (1.1 tons), broken fluorescent lamps (0.26 tons), paint chips containing lead and lead contaminated debris (0.54 tons), acid/caustic contaminated debris (0.65 tons), dirt, dust, and fine debris contaminated with metals (1.18 tons), and chromate contaminated debris (0.09 tons). Waste abrasive material (blast media) was generated from cleaning or stripping power plant equipment and components prior to Page 7 of 13 DIABLO CANYON POWER PLANT -SBI4 PERFORMANCE REPORT (2010)surface coating application.

Broken fluorescent tubes were generated from office lighting maintenance and replacement.

Lead contaminated debris was generated from lead paint abatement activities.

Acid and caustic contaminated debris was generated from routine maintenance and operations of water treatment ion-exchange systems. Dirt and dust contaminated with metals was generated from routine power plant cleaning activities and abrasive blasting operations.

Chromated debris was generated from routine maintenance of emergency diesel engine powered electrical generation systems that contain corrosion inhibiting chromated cooling water.Inorganic solid wastes are generally land-filled at regulated off-site disposal facilities.

4.2 Waste

Oil (CWC 221)Waste oil from routine operations was another major Sf14 waste with 6.53 tons representing 26.4 % of total SBI14 waste generation (Table 2; Figure 3). Waste oils consisted primarily of spent rotating equipment lubrication oil, used diesel generator lubrication oil, and machinery gear oil generated from routine lubrication oil reservoir replenishment or change-out, and off-specification warehouse stock disposal.

As a result of continued frequent preventative maintenance processes at the facility, routine waste oil generation from plant equipment operations has remained elevated and relatively stable on an annual basis subsequent to the 2002 SB 14 reporting year. Therefore, the waste stream remained a major Category-B source (previous to 2002, the waste stream was not designated a major SBl14 source).Waste oil is recycled at off-site facilities either through reprocessing or use as fuel.4.3 Oil Containing Waste (CWC 223)During 2010 oil containing waste was a major SB 14 waste representing 6.41 tons, or 25.85 % of the total SB 14 waste generated (Table 2; Figure 3). Oil containing wastes consisted primarily of adsorbents, mats, rags, pads, plastic containers, and miscellaneous materials generated during routine maintenance.

Another source of oil containing waste was generated from periodic cleanup involving vehicles, machinery, heavy equipment, transformer maintenance, shop activities, and power plant equipment leaks.This waste stream decreased by 2.36 tons (27 %) from the 2006 reporting year. Oil contaminated materials are either incinerated or land-filled (metal filters and clay absorbents) at off-site facilities.

4.4 Organic

Liquid Mixture During 2010 unspecified organic liquid mixtures were a major SB 14 waste stream representing 2.27 tons, or 9.17% of the total SB 14 waste generated (Table 2; Figure 3). Unspecified organic liquid mixtures wastes include water treatment chemical mixtures, off specification solvent liquids, and solvent contaminated lubrication oils. Organic liquid mixtures are incinerated at off site facilities.

Page 8 of 13 DIABLO CANYON POWER PLANT -SB14 PERFORMANCE REPORT (2010)4.5 Organic Solids (CWC 352)The generation of organic solids in 2010 was 1.6 tons (Table 2; Figure 3) or 6.47 % of the total SBl14 waste.Organic solids consisted mainly of surface coatings related paint and solvent contaminated personal protective equipment (PPE), cloth rags, paper, tape, and plastics that were generated during ongoing coatings repair and maintenance associated with corrosion control of metal plant equipment and buildings.

In 2010, organic solids generation decreased 1.9 tons (54 %) from the 2006 reporting year. Organic solid wastes are recycled as fuel grade materials at off-site facilities.

4.6 Paint

Sludge (CWC 461)Paint sludge comprised 6.45 % or 1.6 tons of SB 14 waste in 2010. The paint sludge was generated from cleanup, off-specification materials, unused paint residue from individual coatings maintenance work, and expired shelf-life paint surplused fr'om warehouse stock. The generation of paint sludge in 2010 decreased by 0.74 tons (31.6%) from the 2006 reporting year due to continued increase in inventory control efficiency, and improved field level utilization of inventory.

Paint sludge is recycled as fuel grade materials at off-site facilities.

4.7 Other

Generated SB14 Wastes and Non SB14 Wastes A number of other Category-B wastes were generated at Diablo Canyon Power Plant during 2010, represented as "other SB 14 waste" in Figures 2 and 3, and comprised 2.58 tons or 10.4% of SBl14 waste generation.

These wastes were generated during routine plant maintenance and equipment overhaul activities, or resulted fr'om surplus and disposal of off-specification materials stock. Associated waste volumes are itemized in Table 3.Other minor Category-B SB 14 wastes generated during 2010 accounted for 2.58 tons and included: alkaline soluti~ons without metals (CWC 122); unspecified alkaline solutions (CWC 123); aqueous solutions with metals (CWC 132); aqueous solutions with organic residues <10% (CWC 134);unspecified aqueous solutions (CWC 135); off-specification, aged, or surplus inorganics (CWC 141);hydrocarbon solvents (CWC 213); PCB contaminated materials and debris (CWC 261); off-specification, aged, or surplus adhesives (CWC 281); latex paint wastes (CWC 291); off-specification, aged, or surplus organics (CWC 331); organic liquids with metals (CWC 342); laboratory waste chemicals (CWC 551); contaminated soil (CWC 611); liquids with mercury => 20 ppm (CWC 725), and halogenated organics (CWC 741).Wastes exempt from SB 14 consideration were also generated at Diablo Canyon Power Plant during 2010.These SB 14 exempt and/or non-routine generated wastes totaled 23.35 tons (48.5% of total site waste generation) and included:

friable asbestos -SB14 exempted waste stream (CWC 151); oil containing waste water -non-routine waste oil generated from very infrequent sump cleanout; polychlorinated Page 9 of 13 DIABLO CANYON POWER PLANT -SB14 PERFORMANCE REPORT (2010)biphenyl articles-S5B14 exempted waste stream (CWC 261); unspecified sludge waste -wastewater settling sludge from non-routine water treatment systems maintenance (CWC 491).5.0 CHANGES SINCE BASELINE YEAR Reference Sections 6.3 thru 6. 7 of the DTSC Guidance Manual A comparison of hazardous waste generation between the baseline (2006 and reporting 2010) years indicates that total hazardous waste volumes generated on-site rose by 1.35 tons or 2.89% (Total waste generation in 2006 was 46.78 tons, and in 2010 was 48.13 tons). The rise is total hazardous waste is due to a veiy infrequent sump cleanout task (last performed approximately 20 years ago). This infrequent maintenance activity generated 22.2 tons of oily waste water.SBI14 Category-B applicable hazardous waste generation decreased by 7.43 tons (23.1%) from 32.21 tons in 2006 to 24.78 tons in 2010. During the same period, electrical generation (facility production) increased by 0.3 %primarily due to improvements in scheduled re-fueling outage performance and major capital equipment improvement projects (steam generators and reactor head assembly).

Of the five SB 14 major waste groups identified for source reduction planning in the 2006 baseline year, routine waste generation for four of the five of the groups resulted in reductions during the 2010 reporting year. The'following summarizes the maj or SB 14 waste stream comparisons from 2006 to 2010.Inorganic solid waste (CWC 181), a routine maj or SB 14 waste stream in 2006, decreased by 2.9 tons (43.2%)from 2006 to 2010 primarily due to decreased routine generation of spent sand blast media associated with equipment maintenance and coating activities.

More efficient and effective coating processes that have decreased the rate of ongoing metal corrosion has in-turn decreased the amount of existing coating materials that require removal and subsequent surface repair, and some newer equipment does not require periodic stu'face refinishing (stainless steel and aluminum surfaces).

Inorganic solids have again been identified as a major SB 14 waste for the 2010 reporting year.Waste oil (CWC 221), a major SB 14 routine waste stream in 2006, rose by 0.03 tons or 60 lbs (0.1%) in 2010.Routine equipment oil changeouts and sampling have generated a nominal or baseline amount of waste oil for this reporting period. Waste oil has again been identified as a maj or SB 14 waste for 2010 reporting.

Oil containing waste (CWC 223), a routine major SB 14 waste stream in 2006 decreased 2.36 tons (27 %) in 2010 due to continued improvements in plant housekeeping, more efficient and timely identification and repair of lubrication leaks, and operations process changes that have resulted in reduction of oil contaminated waste generation.

Oil containing waste has again been identified as a maj or SB 14 waste for the 2010 reporting year.Page 10 of 13 DIABLO CANYON POWER PLANT -SB14 PERFORMANCE REPORT (2010)Organic liquid mixtures were identified as a major SBl14 waste stream representing 2.27 tons or 9.17% of the total SB 14 waste generated in 2010. Organic liquid mixtures were a new maj or SB 14 waste for the 2010 reporting year.Organic solids (CWC 352), a routine major SBl4 waste stream in 2006 decreased 1.88 tons (54%) in the 2010 reportring year. Ongoing reduction in the use of cloth, paper, and plastic coverings during surface coating operations has helped reduce overall generation of this waste stream. Organic solids have again been identified as a major SB14 waste for the 2010 reporting year.Paint sludge (CWC 461), a routine major SB 14 waste stream in 2006 decreased 0.74 tons (31.6%) in 2010. The continued decrease in generation reflects effective ongoing implementation of materials inventory controls that reduce surplusing of off-specification and unused/unnecessary paints and epoxy resin coatings.

Furthermore, continued improvement in field level utilization of paint inventoiy¢, and mixing/preparing only the volume that is required to complete the job at hand, has resulted in further reduction in the generation of un-used waste paint at the individual job site. Regardless, extensive coatings and corrosion control efforts continue at the facility, therefore, paint sludge has again been identified as a maj or SB 14 waste for 2010 reporting.

Facility Source Reduction Activities The following is an overview of past, present, and continuing source reduction and waste minimization activities conducted at the facility: Asbestos -suitable non-hazardous substitutes are used during asbestos replacement actions.Recycling Activities

-waste oil, oily water, used oil filters, solvents, mercury waste, fluorescent tubes, light ballasts, toner cart[ridges, lead-acid batteries, paint sludge and many other hazardous and/or industrial wastes.Chlorine Gas -use of sodium hypochlorite was implemented as an effective substitute.

Mercury Waste -this extremely hazardous waste has been eliminated from chemistry laboratory process waste streams through the replacement of Nessler's Reagent (HgI 2) with specific ion electrode teclmology, the elimination of mercuric nitrate, and the, use of Mercuric Thiocyanate, a less toxic alternative.

Chrornated Water -the majority of chromate based corrosion inhibitors have been replaced with less hazardous molybdate based corrosion inhibitors.

Ammonium Hydroxide

-process chemical was replaced with less hazardous monoethanolamine (ETA).Oily Solids -Training based on job responsibilities has been previously implemented and continues to facilitate segregation of oil saturated materials from non-saturated materials.

New methods for reducing oily solid wastes are evaluated as they become available.

Paint Related Waste -.a significant number of solvents, thinners and coatings have been eliminated from use, and suitable substitutes are now in use. Enhanced product inventory controls, and reduction in the generation of excess coating mixture preparations at individual job sites have been successful and continue to be implemented.

Solvents -the laundry dry cleaning and parts/tool cleaning units were discontinued at the facility.

This eliminated the generation of spent Freon, associated contaminated filters, contaminated solids, sludges and oils.Material Coatings -epoxy resin coatings are used only when absolutely necessaiy, and facility personnel continue to pursuing alternatives and substitutes for remaining epoxy applications as feasible.Page 11 of 13 DIABLO CANYON POWER PLANT -SB14 PERFORMANCE REPORT (2010)Acid/Caustic Debris Reductions

-continuous inspection and preventative maintenance of freshwater treatment ion exchange systems have reduced spills and necessity for clean-up of acids and caustics.Waste Oils -establishment of tighter controls and extending the time cycle of equipment overhauls has reduced waste oil generation.

Limited locations where lubricating oil drums are opened and stored, as well as limiting the number of containers open at any one time, also reduced off-specification and excess waste oil generation.

Aerosol Cans -increased employee awareness and recognizing employee waste reduction efforts reduced the generation of waste aerosol cans. A number of substitutes for aerosol cans (sprays/pumps) are presently in use.Empty and/or Damaged Drums -reused, recycled or returned to vendors.Hazardous Waste Disposal -heavy duty, triple-walled paper boxes are used in place of 55 gallon steel drums for hazardous wastes that can be incinerated.

Each box can store the equivalent of four steel drums, and reduces overall use of packing materials and metal.Surplus Hazardous Materials

-made available to other facilities for use, rather than disposing of the materials as hazardous wastes.Hazardous Materials Inventory Control Program -The plant has continued to conduct and refine a program to review and control the procurement and distribution of hazardous materials.

All hazardous materials are reviewed for health, safety and enviromnental impacts prior to acquisition (DCPP Facility Procedure EV2.DC4).The program has increased inventory controls (only required materials are ordered), reduced the overall amount of material in inventory, and reduced disposal of materials (e.g. paint and resins) due to shelf life expiration.

Environmental Operations

-This plant organization provides guidance to facility administrative staff and field level workers on proper hazardous material and hazardous waste management, and promotes efforts for source reduction and waste minimization.

Employee Training Program -employees receive annual hazardous material and hazardous waste training at various levels depending on job requirements.

This training continuously improves awareness with regard to source reduction and waste minimization activities, new regulations, improved plan procedures and work guidance documents, and includes the following training modules:* Hazardous Waste Management

• Hazard Communication

• Hazardous Waste, Storage, Treatment and Manifesting

• Hazardous Waste Workplace Accumulation Areas and Transfer Locations* Chemical Awareness* Spill Response* Hazardous Materials Incident -Initial Response/Mitigation

• Asbestos Management Training Employee Recognition Program -Diablo Canyon Power Plant previously implemented an employee incentive program thatprovided rewards for ideas that benefited the plant (ideas included those that would promote source reduction and hazardous and extremely hazardous waste minimization).

Emergency Response Guidance, Spill Prevention Control and Countermeasure Plan -designed to protect human health and the environment.

Updating of these documents occurs as required by regulation.

The facility also maintains a Hazardous Waste Management Program and related procedures.

The SPCC plan includes routine equipment inspection to minimize the potential for materials leaks.Waste Management System -a hazardous waste management system, PG&E environmental compliance information tracking system (EIS-previous

& Enviance-current), and other databases are used at Diablo Canyon Power Plant to track hazardous waste management activities.

The systems allow the plant to access historic waste generation information and produce ongoing required waste management reports in a variety of formats.PG&E Utility Environmental Committees and Coordination Meetings -objectives include sharing and transferring of source reduction and waste minimization data and information.

Page 12 of 13 DIABLO CANYON POWER PLANT -SB14 PERFORMANCE REPORT (2010)6.0 CERTIFICATION Reference Section 6.8 of the DTSC Guidance Manual Technical Certification for the Performance Report I certif~y that this report meets the requirements of Title 22 California Code of Regulations (CCR) Section 67100.13 (d)( 1) regoarding hazardous waste generation onsite, and offsite management of hazardous waste.Tim Ihving ____________

Radiation Protection Manager Signature P acific G as & E lectric C om pany_ _ _ _ _ _ _ _ _ _ _ _ _ _ _Diablo Canyon Power Plant Date Financial Certification for the Performance Report I certify' that this document and all attachmnents were prepa'ed under my direction Or supervision in accordance with a system designed to assure that qualified personnel properly gather and evaluate the information submitted.

Based on my inquiry of the person or persons who manage the system, or the persons directly responsible for gathering the information, the information submitted is, to the best of my kcnowledge and belief, true, accurate and complete.

I am aware that there are significant penalties for makting false statements or representations to the Department, including the possibility of fines for criminal violations.

James M. Welsch ________________

Station Director Signature Pacific Gas & Electric Company_______________

Diablo Canyon Power Plant Date Page 13 of 13 DIABLO CANYON POWER PLANT -SB14 PERFORMANCE REPORT (2014)

1.0 INTRODUCTION

Routine waste generators of specified hazardous waste in excess of 12,000 kg/year (26,400 pounds) and/or extremely hazardous waste in excess of 12 kg/year (26.4 pounds) were required by Senate Bill 14 (SB 14), the Hazardous Waste Source Reduction and Management Review Act of 1989, Health and Safety Code Section 25244.12 et seq., to produce a Source Reduction Evaluation Review and Plan, and Performance Report, by September 1, 1991. In addition to development of the original "Plan" and "Report", generators are required to repeat this process every four years thr'ough the development of a Quadrennial Review and Plan and Performance Report.Subsequent legislation, SB 1726 (Chapter 853 of the 1992 Statute), which amended and added Sections to the Health and Safety Code, captured generators routinely producing over 5,000 kg (5.5 tons) of specified hazardous wastes and new generators in business since the passage of SB 14. The specified categories of hazardous waste, which primarily impact generators of aqueous and solid organic compounds, polychlorinated biphenyls (PCBs), and metal-containing solid waste, include:* Any RCRA hazardous waste for which a federal treatment standard has not been adopted or for which EPA has granted a delay of the effective date;* Any non-RCRA hazardous waste subj ect to treatment standards based upon incineration, solvent extraction or biological treatment, and;* Any non-RCRA hazardous waste subj ect to the treatment standard adopted for non-RCRA metal-containing solid waste pursuant to Section 66268.106(a)(3) of Title 22 of the California Code of Regulations.

SB 1726 also requires captured generators to project a four-year numerical (percent) source reduction goal. For generators with completed SB 14 documents, the goal must be completed with each Quadrennial Review and Plan. In addition, all generators must submit a biennial progress report (EPA Form GM, Waste Generation and Management) as part of the required biennial generator report (Title 22 of the California Code of Regulations).

The report must be completed by March 1 s of even numbered years. The numerical source reduction goal and biennial report are designed to support the original SB,14 goal of reducing the generation and release of hazardous waste to the environment by requiring documentation of hazardous waste management activities and source reduction options applicable to a generator's waste streams.Additional legislation, SB 1133, amended SB 14 by requiring inclusion of hazardous waste waters generated on-site in the SB 14 calculations and in the review of source reduction options. SB 1133 requires generators of hazardous waste waters, whether treated on-site or off-site, to include these volumes in the initial SB 14 Page 1 of 13 DIABLO CANYON POWER PLANT -SB14 PERFORMANCE REPORT (2014)tabulation, regardless of ultimate disposition.

If the included waste water is a SB 14 major waste stream (more than 5% of the total SB 14 waste), then applicable source reduction measures are to be evaluated.

In addition, the waste water volume is then removed from the original SB 14 calculation, and a new calculation is made to determine all other SB 14 maj or wastes.The Diablo Canyon Power Plant completed the original Source Reduction Review and Plan and Performance Report by September 1, 1991 (baseline year =1990), and submitted the subsequent Biennial Progress Report (1993 data) on March 1, 1994. In addition, an SB14 Status Report was produced in 1994.. Quadrennial source reduction evaluation reviews and plans were produced in 1995 (1994 data), 1999 (1998 data), and 2003 (2002 data), 2007 (2006 data), and 2011 (2010 data). This document, and the Quadrennial Source Reduction Evaluation Review and Plan -2014 Reporting Year, for the Diablo Canyon Power Plant, provides the following information and facility waste generation data:* Pacility information

• Site description

• Waste generation

• Current waste management practices* Results of past waste management practices Additional companion documents to this Performance Report, prepared by September 1, 2015, include:* Quadrennial Summary Progress Report (SPR) -2014 Reporting Year* Quadrennial Source Reduction Evaluation Review and Plan -2014 Reporting Year 2.0 FACILITY INFORMATION Reference Section 6.2 of the DTSC Guidance Manual Facility Name: Diablo Canyon Power Plant (DCPP)Pacific Gas & Electric Company Address: 9 Miles NorthWest of Avila Beach P.O. Box 56 Avila Beach, California, 93424 Telephone:

(805) 545-3607 Trevor Rebel, Senior Environmental Coordinator EPA ID#: CAD077966349 SIC Code: 4911 Type of Business:

Electrical Generation, Nuclear Steam Power Plant Facility Operational:

1984 Number of Employees:

1,350 (estimated)

Page 2 of 13 DIABLO CANYON POWER PLANT -SB14 PERFORMANCE REPORT (2014)3.0 SITE DESCRIPTION AND ELECTRICAL GENERATION Referenced Section 6.2 of the DTSC Guidance Manual The Diablo Canyon Power Plant, operated by Pacific Gas and Electric Company, is located nine miles northwest of Avila Beach, California.

The plant produces electrical energy using two nuclear powered generation units (Unit 1 rated at 1,153 Megawatts Electric MWe; and, Unit 2 rated at 1,182 MWe [turbine generator nameplate ratings]).

The facility has a total nameplate generation rating capacity of 2,335 ,MWe.Table 1. Megawatt-Hour (MWe-hr.)

Net Generation at Diablo Canyon Power Plant, 2010 and 2014.2010 2014 Unit 1 8,698,083 8,542,450 IUnit 2 9,815,586 8,486,119 Total 18,513,669 17,028,569 The plant output, or electrical production at Diablo Canyon Power Plant, is measured as megawatt-hour generation (MWe-hr).

During 2010, the total generation was 17,028,569 megawatt-hours, while during the 2014 reporting year generation was 17,028,569 megawatt-hours (Table 1). Total facility generation decreased from 2010 to 2014 due to forced outage activities and a scheduled refueling outage on each unit. Output ratings and generation figures, as shown above, are derived from PG&E DCPP Plant Operations Statistics for 2010 and 2014.4.0 WASTE GENERATION AND MANAGEMENT PRACTICES Reference Sections 6. 3 through 6. 5 of the DTSC Guidance Manual During the electrical generation process and associated power plant maintenance activities, a variety of hazardous wastes are generated.

Major power plant reactor re-fueling outages are scheduled to conduct overHaul activities, which increase the generation of non-routine hazardous wastes. Unscheduled forced maintenance outages may also impact total site waste generation volumes. The following section presents a description of the six major SB 14 waste streams generated at Diablo Canyon Power Plant during the 2010 and 2014 reporting years.In 2010, the baseline comparison year for this report, 48.13 tons of total hazardous waste, including 24.78 tons of non-exempted routine SB 14 waste, was generated at Diablo Canyon. The six maj or Categoiy-B SB 14 waste streams in 2010 totaled 22.2 tons and comprised 46.13% of overall facility hazardous waste generation.

In Page 3 of 13 DIABLO CANYON POWER PLANT -SB14 PERFORMANCE REPORT (2014)2014, 56.74 tons of total hazardous waste, including 28.50 tons of non-exempted routine SB 14 waste, was generated:

The four maj or Category-B SB 14 waste streams in 2014 totaled 24.94 tons, and comprised 43.9% of overall facility hazardous waste generation.

2014 facility major Category-B SB 14 wastes are summarized in the following table (Table 2): 1. Waste Oil (CWC 221) =13.28 tons 2. Oil Containing Waste (CWC 223) = 7.46 tons 3. Organic Solids (CWC 352) = 2.04 tons 4. Paint Sludge (CWC 461) =2.16 tons Table 2. Major Category-B SB14 Waste Streams for DCPP 2014.CWC = California Waste Code Other minor Category-B SB 14 wastes generated during 2010 accounted for 3.56 tons and included: unspecified alkaline solutions (CWC 123); aqueous solutions withmetals (CWC 132); aqueous solutions with organic residues >10% (CWC 133); off-specification, aged, or surplus inorganics (CWC 141);Inorganic Solid Waste (CWC 181); off-specification, aged, or surplus adhesives (CWC 281); latex paint wastes (CWC 291); off-specification, aged, or surplus organics (CWC 331); organic liquids with metals (CWC 342); Organic Liquid Mixtures (CWC 343); laboratory waste chemicals (CWC 551);contaminated soil (CWC 611); liquids with mercury => 20 ppm (CWC 725), and halogenated organics (CWC 741); liquids with pH < 2 (CWC 792).Page 4 of 13 DIABLO CANYON POWER PLANT -SBI14 PERFORMANCE REPORT (2014)Table 3. Hazardous Waste Generated at Diablo Canyon Power Plant -2010 and 2014_____Hazrdous Waste Generation 2010 2014 CWC Waste Stream Description Tons SB14 Tons SB14___________________________________Waste

% Waste %123 Unspecified Alkaline Solution 0.02 0.09 0.02 0.06 132 Aqueous Solutions with Metals 0.22 0.88 0.21 0.75 133 *Aqueous Solution (>10% Organic Residue) _____ 0.21 134 Aqueous Solution (Organic Residue < 10%) 0.28 1.12 ____135 Unspecified Aqueous Solution 0.17 0.69 ____141 Off-Specification, Aged, or Surplus Inorganics 0.21 0.83 0.02 0.08 151

• Asbestos 0.19 _____ 3.14 181 Inorganic Solid Waste 3.79 15.30 1.29 4.53 213 Hydrocarbon Solvents 0.07 0.30 221

• Waste Oil 13.28 221 Waste Oil 6.53 26.36 13.28 46.6 223

• Oil Containing Waste 22.2 ____ 10.41 223 Oil Containing Waste 6.41 25.85 7.46 26.17 261

• Polychlorinated Biphenyls (PCBs) 0.30 0.17 261 PCB Contaminated Materials 0.01 0.05 281 Adhesives 0.10 0.41 0.24 0.85 291 Latex Waste 0.07 0.29 0.21 0.75 291

• Latex Waste _____ 1.04 331 Off-Specification, Aged, or Surplus Organics 0.32 1.28 0.08 0.27 342 Organic Liquids with Metals 0.03 0.10 .005 0.02 343 Organic Liquid Mixture 2.27 9.17 0.96 3.36 352 Organic Solids 1.60 6.47 2.04 7.16 461 Paint Sludge 1.60 6.45 2.16 7.58 491

• Unspecified Sludge Waste 0.68 551 Laboratory Waste Chemicals 0.01 0.03 0.06 0.20 611 Contaminated Soil 0.99 4.00 0.27 0.94 725 Liquids with Mercury =>20 mg/l 0.01 0.02 .003 0.01 741 Halogenated Organics > 1000 mg/I 0.08 0.32 0.12 0.40 792

• Liquids with pH =< 2.0 with Metals _____0.08 0.27 Total Site Hazardo us Waste Generation (Tons) 48.13 ... ..56.74 TtlBJAplcbeWseGnrtn(Tn)24.78 28.50 ..Total SBi4 Major Category-B Wastes (Tons) 22.20 _____ 24.94 ____Data Source for Baseline Year Data (2010): Source Reduction Evaluation Review and Plan and Source Reduction Canyon Power Plant 2014 Reporting Year Performance Report Diablo* Indicates waste generated on a non-routine basis, or waste exempt from SB 14 consideration.

Bold Print represents a major SB 14 waste category (>5% of total SBI4 wastes) in 2010 and/or 2014 reporting year.Page 5 of 13 DIABLO CANYON POWER PLANT -SBI4 PERFORMANCE REPORT (2014)Total Waste Generation and SB14 Waste Catagories at Diablo Canyon Power Plant -2010* Inorganic Solid Wastes 7.9%*I Non-Routine and SB-14 Exempt Wastes 48.5%* Waste Oil Containing1.Wst 13.3%* Organic Liquid Mixture 4. 7%U Organic Solids 3.3%* Other SBI4 Wastes U Paint Sludge 5.4% 3.3%Figure 1. Total Waste Generation at Diablo Canyon Power Plant (DCPP) during 2010.Total Waste Generation and SBI4 Waste Catagorles at Diablo Canyon Power Plant- 2014* Waste Oil 23.4%* Non-Reulbe and SB.

Waste 49.8%Oil Centainln~g Waste 13.1%U PainIS'udgeE O 3.6%oid U Other 5B14 Wastes 3.8% 36 6.3%Figure 2. Total Waste Generation at Diablo Canyon Power Plant (DCPP) during 2014.Page 6 of 13 DIABLO CANYON POWER PLANT -SB14 PERFORMANCE REPORT (2014)SBI4 Waste Generation at Diablo Canyon Power Plant -2014 U Other SBI4 Wastes 12.$%'U Ptint 7.6%0 organicSoui, 4.6 7.,2%[1 WaseOi* olcenfalnbag 26.2%Figure 3. SB 14 Waste Generation at Diablo Canyon Power Plant (DCPP) during 2014.During the 2014 reporting year, 56.74 tons of total hazardous waste, and 28.5 tons of non-exempted routine Category-B SBI4 wastes were generated at DCPP. The following paragraphs discuss the four maj or SB 14 waste streams generated at DCPP during the 2014 reporting year (waste oil, oil containing waste, organic solids, and paint sludge) and other generated hazardous wastes.In accordance with SB 14 definitions, "aqueous waste" refers to a hazardous waste stream processed in a wastewater treatment unit which discharges to a POTW or discharges to receiving waters under a National Pollution Discharge Elimination Systems (NPDES) Permit (reference December 2010 DTSC Guidance Manual for SB14). DCPP operates a once-through-cooling water system under an NPDES permit. The only aqueous waste streams that are treated prior to discharge under the facility NPDES Permit do not exhibit hazardous characteristics prior to treatment.

Therefore, all waste streams identified and described in the following report section are categorized as non-aqueous Category-B wastes according to the DTSC SB 14 Guidance Manual definitions.

4.1 Waste

Oil (CWC 221)Waste oil from routine operations was a major SB 14 waste with 13.28 tons representing 46.6 % of total SB 14 waste generation (Table 2; Figure 3). Waste oils consisted primarily of spent rotating equipment lubrication oil, used diesel generator lubrication oil, and machinery gear oil generated from routine lubrication oil reservoir replenishment or change-out, and off-specification warehouse stock disposal.

As a result of continued frequent preventative maintenance processes at the facility, routine waste oil generation from plant equipment operations has remained elevated and relatively stable on an annual basis subsequent to the 2002 SB 14 reporting year. Therefore, the waste stream remained a major Page 7 of 13 DIABLO CANYON POWER PLANT -SBI4 PERFORMANCE REPORT (2014)Category-B source (previous to 2002, the waste stream was not designated a major SBl14 source). Waste oil is recycled at off-site facilities either through reprocessing or use as fuel.4.2 Oil Containing Waste (CWC 223)During 2010 oil containing waste was a major SB 14 waste representing 7.46 tons, or 26.18 % of the total SB14 waste generated (Table 2; Figure 3). Oil containing wastes consisted primarily of adsorbents, mats, rags, pads, plastic containers, and miscellaneous materials generated during routine maintenance.

Another source of oil containing waste was generated from periodic cleanup involving vehicles, machinery, heavy equipment, transformer maintenance, shop activities, and power plant equipment leaks.This waste stream increased by 1.05 tons (16 %) from the 2010 reporting year. This is largely due to the power plant having two scheduled refueling outages in 2014. Additionally, the facility had four forced outages during 2014. Outages, both scheduled and forced, generate additional oily waste streams. Oil contaminated materials are either incinerated or land-filled (metal filters and clay absorbents) at off-site facilities.

4.3 Organic

Solids (CWC 352)The generation of organic solids in 2014 was 2.04 tons (Table 2; Figure 3) or 7.16 % of the total SB14 waste.Organic solids consisted mainly of surface coatings related paint and solvent contaminated personal protective equipment (PPE), cloth rags, paper, tape, and plastics that were generated during ongoing coatings repair and maintenance associated with corrosion control of metal plant equipment and buildings.

In 2014, organic solids generation increased 0.44 tons (27 %) from the 2010 reporting year. This rise in organic solid waste (CWC 352)is directly attributable to two refueling outages in 2014. Organic solid wastes are recycled as fuel grade materials at off-site facilities.

4.4 Paint

Sludge (CWC 461)Paint sludge comprised 7.58 % or 2.16 tons of SB 14 waste in 2014. The paint sludge was generated from cleanup, off-specification materials, unused paint residue from individual coatings maintenance work, and expired shelf-life paint surplused from warehouse stock. The generation of paint sludge in 2014 rose by 0.56 tons (35%) from the 2010 reporting year due to two refueling maintenance outages in the 2014 reporting year. Paint sludge is recycled as fuel grade materials at off-site waste treatment facilities.

4.5 Other

Generated SB14 Wastes and Non SB14 Wastes A number of other Category-B wastes were generated at Diablo Canyon Power Plant during 2014, represented as "other SB 14 waste" in Figures 2 and 3, and comprised 3.56 tons or 12.49% of SBI14 waste generation.

These wastes were generated during routine plant maintenance and equipment overhaul activities, or resulted from surplus and disposal of off-specification materials stock. Associated waste volumes are itemized in Table 3.Page 8 of 13 DIABLO CANYON POWER PLANT -SB14 PERFORMANCE REPORT (2014)Other minor Categoiy-B SB 14 wastes generated during 2014 accounted for 3.56 tons and included: unspecified alkaline solutions (CWC 123); aqueous solutions with metals (CWC 132); aqueous solutions with organic residues >10% (CWC 133); off-specification, aged, or surplus inorganics (CWC 141);Inorganic Solid Waste (CWC 181); off-specification, aged, or surplus adhesives (CWC 281); latex paint wastes (CWC 291); off-specification, aged, or surplus organics (CWC 331); organic liquids with metals (CWC 342); Organic Liquid Mixtures (CWC 343); laboratory waste chemicals (CWC 551);contaminated soil (CWC 611); liquids with mercury => 20 ppm (CWC 725), and halogenated organics (CWC 741); liquids with pH < 2 (CWC 792).Wastes exempt from SB 14 consideration were also generated at Diablo Canyon Power Plant during 2014.These SB 14 exempt and/or non-routine generated wastes totaled 28.25 tons (49.8% of total site waste generation) and included:

ethylene glycol (antifreeze) from vehicles (CWC 133); friable asbestos -SB14 exempted waste stream (CWC 151); infrequent oil equipment change out (CWC 221); oil containing ballast from an infrequent building remodels (CWC 223); oil containing waste water -non-routine waste oil generated from infrequent sump cleanout," polychlorinated biphenyl articles -SB14 exempted waste stream (CWC 261); latex paint waste (CWC 291) from very infrequent building remodels.5.0 CHANGES SINCE BASELINE YEAR Reference Sections 6.3 thru 6. 7 of the DTSC Guidance Manual A comparison of hazardous waste generation between the baseline (2010 and reporting 2014) years indicates that total hazardous waste volumes generated on-site rose by 8.61 tons or 17.9% (Total waste generation in 2010 was 48.13 tons, and in 2014 was 56.74 tons). The rise in total hazardous waste is due to several factors: 2014 was a two refueling outage year, and four unplanned maintenance outages also occurred in 2014. Additionally, infrequently performed activities including sump clean-outs, oil system replacement, and site building remodel waste materials contributed 24.7 tons to the site waste generation total.SB14 Category-B applicable hazardous waste generation rose by 3.72 tons (13%) from 27.78 tons in 2010 to 28.5 tons in 2014.Of the six SB 14 major waste groups identified for source reduction planning in the 2010 baseline year, routine waste generation for two of the six of the groups resulted in reductions during th~e 2014 reporting year. The following summarizes the maj or SB 14 waste stream comparisons from 2010 to 2014.Inorganic solid waste (CWC 181), a routine major SB 14 waste stream in 2010, decreased by 2.5 tons (66%) from 2010 to 2014 primarily due to decreased routine generation of spent sand blast media associated with equipment maintenance and coating activities.

Mor'e efficient and effective coating processes that have decreased the rate of Page 9 of 13 DIABLO CANYON POWER PLANT -SB14 PERFORMANCE REPORT (2014)ongoing metal corrosion has in-turn decreased the amount of existing coating materials that require removal and subsequent surface repair, and some newer equipment does not require periodic surface refinishing (stainless steel and aluminum surfaces).

Inorganic solids (CWC 181) are not a major SBl12 waste stream in 2014.Waste oil (CWC 221), a maj or SBl14 routine waste stream in 2010, rose by 6.75 tons or 103% in 2014. Routine equipment oil changeouts and sampling have generated a larger amount of waste oil due to several maintenance outages in this reporting period. Waste oil has again been identified as a major SB 14 waste for 2014 reporting.

Oil containing waste (CWC 223), a routine maj or SB 14 waste stream in 2010 rose by 1.05 tons in 2014 due increased maintenance outage periods. Oil containing waste has again been identified as a maj or SB 14 waste for the 2014 reporting year.Organic solids (CWC 352), a routine major SB 14 waste stream in 2010 increased 0.44 tons (28%) in the 2014 reporting year. Increased maintenance and coatings work from a multiple outage year is the cause of the increase.

Organic solids have again been identified as a maj or SB 14 waste for the 2014 reporting year.Paint sludge (CWC 461), a routine major SB14 waste stream in 2010 increased 0.56 tons (35%) in 2010.Increased maintenance and coatings work from a multiple outage year is the cause of the increase.

Regardless, extensive coatings and corrosion control efforts will continue at the facility, therefore, paint sludge has again been identified as a maj or SB 14 waste for 2014 reporting.

Facility Source Reduction Activities The following is an overview of past, present, and continuing source reduction and waste minimization activities conducted at the facility: Asbestos -suitable non-hazardous substitutes are used during asbestos replacement actions.RecyCling Activities

-waste oil, oily water, ftsed oil filters, solvents, mercury waste, fluorescent tubes, light ballasts, toner cartridges, lead-acid batteries, paint sludge and many other hazardous and/or industrial wastes.Chlorine Gas -use of sodium hypochlorite was implemented as an effective substitute.

Mercury Waste -this extremely hazardous waste has been eliminated from chemistry laboratory process waste streams through the replacement of Nessler' s Reagent (HgI 2) with specific ion electrode technology, the elimination of mercuric nitrate, and the use of Mercuric Thiocyanate, a less toxic alternative.

Chromated Water -the majority of chromate based corrosion inhibitors have been replaced with less hazardous molybdate based corrosion inhibitors.

Ammonium Hydroxide

-process chemical was replaced with less hazardous monoethanolamine (ETA).Page 10 of 13 DIABLO CANYON POWER PLANT -SB14 PERFORMANCE REPORT (2014)Oily Solids -Training based on job responsibilities has been previously implemented and continues to facilitate segregation of oil saturated materials from non-saturated materials.

New methods for reducing oily solid wastes are evaluated as they become available.

Paint Related Waste -a significant number of solvents, thinners and coatings have been eliminated from use, and suitable substitutes are now in use. Enhanced product inventory controls, and reduction in the generation of excess coating mixture preparations at individual job sites have been successful and continue to be implemented.

Solvents -the laundry dry cleaning and parts/tool cleaning units were discontinued at the facility.

This eliminated the generation of spent Freon, associated contaminated filters, contaminated solids, sludges and oils.Material Coatings -epoxy resin coatings are used only when absolutely necessary, and facility personnel continue to pursuing alternatives and substitutes for remaining epoxy applications as feasible.Acid/Caustic Debris Reductions

-continuous inspection and preventative maintenance of freshwater treatment ion exchange systems have reduced spills and necessity for clean-up of acids and caustics.Waste Oils -establishment of tighter controls and extending the time cycle of equipment overhauls has reduced waste oil generation.

Limited locations where lubricating oil drums are opened and stored, as well as limiting the number of containers open at any one time, also reduced off-specification and excess waste oil generation.

Aerosol Cans -increased employee awareness and recognizing employee waste reduction efforts reduced the generation of waste aerosol cans. A number of substitutes for aerosol cans (sprays/pumps) are presently in use.Empty and/or Damaged Drums -reused, recycled or" returned to vendors.Hazardous Waste Disposal -heavy duty, triple-walled paper boxes are used in place of 55 gallon steel drums for hazardous wastes that can be incinerated.

Each box can store the equivalent of four steel drums, and reduces overall use of packing materials and metal.Surplus Hazardous Materials

-made available to other facilities for use, rather than disposing of the materials as hazardous wastes.Hazardous Materials Inventory Control Program -The plant has continued to conduct and refine a program to review and control the procurement and distribution of hazardous materials.

All hazardous materials are reviewed for health, safety and environmental impacts prior to acquisition (DCPP Facility Procedure EV2.DC4).The program has increased inventory controls (only required materials are ordered), reduced the overall amount of material in inventory, and reduced disposal of materials (e.g. paint and resins) due to shelf life expiration.

Environmental Operations

-This plant organization provides guidance to facility administrative staff and field level workers on proper hazardous material and hazardous waste management, and promotes efforts for source reduction and waste minimization.

Employee Training Program -employees receive annual hazardous material and hazardous waste training at various levels depending on job requirements.

This training continuously improves awareness with regard to source reduction and waste minimization activities, new regulations, improved plan procedures and work guidance documents, and includes the following training modules:* Hazardous Waste Management

• Hazard Communication

• Hazardous Waste, Storage, Treatment and Manifesting

• Hazardous Waste Workplace Accumulation Areas and Transfer Locations* Chemical Awareness* Spill Response* Hazardous Materials Incident -Initial Response/Mitigation

• Asbestos Management Training Employee Recognition Program -Diablo Canyon Power Plant previously implemented an employee incentive program that provided rewards for ideas that benefited the plant (ideas included those that would promote source reduction and hazardous and extremely hazardous waste minimization).

Page 11 of 13 DIABLO CANYON POWER PLANT -SB14 PERFORMANCE REPORT (2014)Emergency Response Guidance, Spill Prevention Control and Countermeasure Plan -designed to protect human health and the environment.

Updating of these documents occurs as required by regulation.

The facility also maintains a Hazardous Waste Management Program and related procedures.

The SPCC plan includes routine equipment inspection to minimize the potential for materials leaks.Waste Management System -a hazardous waste management system, PG&E environmental compliance information tracking system (EIS-previous

& Enviance-current), and other databases are used at Diablo Canyon Power Plant to track hazardous waste management activities.

The systems allow the plant to access historic waste generation information and produce ongoing required waste management reports in a variety of formats.PG&E Utility Environmental Comimittees and Coordination Meetings -objectives include sharing and transferring of source reduction and waste minimization data and information.

Page 12 of 13 DIABLO CANYON POWER PLANT -SB14 PERFORMANCE REPORT (2014)6.0 CERTIFICATION Reference Section 6.8 of the DTSC Guidance Manual Technical Certification for the Performance Report I certify that this report meets the requirements of Title 22 California Code of Regulations (CCR) Section 67100. 13(d)( 1) regarding hazardous waste generation onsite, and offsite management of hazardous waste.Kenneth Cortese_________________

Chemistry and Environmental Manager Signature Pacific Gas & Electric Company_______________

Diablo Canyon Power Plant Date Financial Certification for the Performance Report I certify that this document and all attachments were prepared under my direction or supervision in accordance with a system designed to assure that qualified personnel properly gather and evaluate the information submitted.

Based on my inquiry of the person or persons who manage the system, or the persons directly responsible for gathering the information, the information submitted is, to the best of my knowledge and belief, true, accurate and complete.

I am aware that there are signi~icant penalties for making false statements or representations to the Department, including the possibility of fines for criminal violations.

Jan A. Nimick______________

Station Director Signature Pacific Gas & Electric Company _______________

Diablo Canyon Power Plant Date Page 13 of 13

DIABLO CANYON POWER PLANT -SB14 PLAN (2014)

1.0 INTRODUCTION

Routine waste generators of specified hazardous waste in excess of 12,000 kg/year (26,400 pounds)and/or extremely hazardous waste in excess of 12 kg/year (26.4 pounds) were required by Senate Bill 14 (SB 14), the Hazardous Waste Source Reduction and Management Review Act of 1989, Health and Safety Code Section 25244.12 et seq., to produce a Source Reduction Evaluation Review and Plan, and Performance Report, by September 1, 1991. Tn addition to development of the original "Plan" and"Report", generators are required to repeat this process every four years thr'ough the development of a Quadrennial Review and Planand Performance Report.Subsequent legislation, SB 1726 (Chapter 853 of the 1992 Statute), which amended and added sections to the Health and Safety Code, captured generators routinely producing over 5,000 kg (5.5 tons) of specified hazardous wastes and new generators in business since the passage of SB 14. The specified categories of hazardous waste include:* Any RCRA hazardous waste for which a federal treatment standard has not been adopted or for which EPA has granted a delay of the effective date;.0 A ny non-RCRA hazardous waste subj ect to treatment standards based upon incineration, solvent extraction, or biological treatment, and;*Any non-RCRA hazardous waste subj ect to the treatment standard adopted for non-RCRA.

metal-containing solid waste pursuant to Section 66268.1I06(a)(3) of Title 22 of the California Code of Regulations.

SB 1726 also required captured waste generators to proj ect a four-year numerical (percent) source reduction goal. For generators with completed SB 14 documents, the goal must be prepared with each Quadrennial Review and Plan. In addition, all waste generators must submit a biennial progress report (EPA Form GM, Waste Generation and Management) as part of the required biennial generator report (Title 22 of the California Code of Regulations).

The report must be completed by March 1 st of even numbered years. The numerical source reduction goal and biennial report are designed to support the original SB 14 goal of reducing the generation and release of hazardous waste to the environment by requiring documentation of hazardous waste management activities and source reduction options applicable to a generator's waste streams.Additional legislation, SBI 1133, amended SB 14 by requiring inclusion of hazardous waste waters generated on-site in the SB 14 calculations and in the review of source reduction options. SB 1133 requires generators of hazardous waste waters, whether treated on-site or off-site, to include these Page 1 of 16 DIABLO CANYON POWER PLANT -SB14 PLAN (2014)volumes in the initial SB 14 tabulation, regardless of ultimate disposition.

If the included waste water is a SBl14 major waste stream (more than 5% of the total SBl14 waste), then applicable source reduction measures are to be evaluated.

In addition, the waste water volume is then removed from the original SB 14 calculation, and a new calculation is made to determine all other SBI14 major wastes.The Diablo Canyon Power Plant completed the original Source Reduction Review and Plan and Performance Report by September 1, 1991 (baseline year = 1990), and submitted the subsequent Biennial Progress Report (1993 data) on March 1, 1994. In addition, an SB 14 Status Report was produced in 1994. Quadrennial source reduction evaluation reviews and plans were produced in 1995 (1994 data), 1999 (1998 data), 2003 (2002 data), 2007 (2006 data), and 2011 (2010 data). This document, and the Quadrennial Performance Report -2014 Reporting Year, for the Diablo Canyon Power Plant, provides the following information and data:* Facility information

• Site description

• Hazardous and extremely hazardous waste generation

• Source reduction measures and evaluations applicable to SB 14 waste streams* Implementation schedule for selected source reduction options* Numerical hazardous waste r~eduction goal Additional companion documents to this Review and Plan, prepared by September 1, 2015, include:* Quadrennial Performance Report -2014 Reporting Year* Quadrennial Summamy Progress Report (SPR) -2014 Reporting Year Page 2 of 16 DIABLO CANYON POWER PLANT -SB14 PLAN (2014)2.0 FACILITY INFORMATION Reference Section 5.2 of the DTSC Guidance Manual Facility Name: Diablo Canyon Power Plant Pacific Gas & Electric Company Address / Location:

9 Miles North West of Avila Beach, CA P.O. Box 56 Avila Beach, CA, 93424 Telephone:

(805) 545-3607 Trevor D. Rebel, Senior Environmental Coordinator EPA ID#: CAD 077 966 349 SIC Code: 4911 Type of Business:

Electrical Generation, Nuclear Steam Power Plant Facility Operational:

1984 Number of Employees:

1,350 (estimated)

Page 3 of 16 DIABLO CANYON POWER PLANT -SB14 PLAN (2014)3.0 SITE DESCRIPTION AND WASTE GENERATION Reference Sections 5.2 through 5.5 of the DTSC Guidance Manual The Diablo Canyon Power Plant, operated by Pacific Gas and Electric Company, is located nine miles northwest of Avila Beach, California.

The plant produces electrical energy using two nuclear powered generation units (Unit 1 rated at 1153 MWe; and, Unit 2 rated at 1182 MWe [ turbine generator nameplate ratings ]). The facility has a total nameplate rating generating capacity of 2335 MWe.During the electrical generation process and associated power plant maintenance activities, a variety of routine hazardous wastes are generated.

Generation of non-routine waste increases during scheduled plant maintenance outages as well as during unscheduled forced maintenance outages. The following sections present a description of the four maj or SB 14 waste streams generated at Diablo Canyon Power Plant in 2014 (waste oil, oil containing waste, organic solids, and paint sludge), and other generated hazardous wastes. Reference Table- 1 and Figure 1.3.1 Waste Oil (CWC 221)Waste oil fi'om routine operations was a major SB 14 waste with -13.28 tons representing 46.6% of total SB 14 waste generation (Table 1; Figure 1). Waste oils consisted primarily of spent rotating equipment lubrication oil, used diesel generator lubrication oil, and machinery gear oil generated from routine lubrication oil reservoir replenishment or change-out, and off-specification warehouse stock disposal.

As a result of continued frequent preventative maintenance processes at the facility, routine waste oil generation fr'om plant equipment operations has remained elevated and relatively stable on an annual basis subsequent to the 2002 SB 14 reporting year. Therefore, the waste stream remained a major Category-B source (previous to 2002, the waste stream was not designated a major SB 14 source).Waste oil is recycled at off-site facilities either through reprocessing or use as fuel.3.2 Oil Containing Waste (CWC 223)During 2014 oil containing waste was a maj or SB 14 waste representing 7.46 tons, or 26.17 % of the total SB 14 waste generated (Table 1; Figure 1). Oil containing wastes consisted primarily of adsorbents, mats, rags, pads, plastic containers, and miscellaneous materials generated during routine maintenance.

Another source of oil containing waste was generated from periodic cleanup involving vehicles, machinery, heavy equipment, transformer maintenance, shop activities, and power plant equipment leaks.This waste stream increased by 1.05 tons (16 %) from the 2010 reporting year. The increase in generation is from the site having two refueling outages and several planned maintenance outages during Page 4 of 16 DIABLO CANYON POWER PLANT -SB14 PLAN (2014)the 2014 reporting year. Oil contaminated materials are either incinerated or land-filled (metal filters and clay absorbents) at off-site facilities.

3.3 Organic

Solids (CWC 352)The generation of organic solids in 2014 was 2.04 tons (Table 1; Figure 1) or 7.16 % of the total SB 14 waste.Organic solids consisted mainly of surface coatings related paint and solvent contaminated personal protective equipment (PPE), cloth rags, paper, tap, and plastics that were generated during ongoing coatings repair and maintenance associated with corrosion control of metal plant equipment and buildings.

In 2014, organic solids generation increased 0.44 tons (27 %) from the 2010 reporting year. Organic solid wastes are recycled as fuel grade materials at off-site facilities.

3.4 Paint

Sludge (CWC 461)Paint sludge comprised 7.58 % or 2.16 tons of SBl14 waste in 2014. The paint sludge was generated from cleanup, off-specification materials, unused paint residual from individual coatings maintenance work, and expired shelf-life paint surpluses from warehouse stock. The generation of paint sludge in 2010 increased by 0.56 tons (35%) from the 2010 reporting year due to several maintenance outages in 2014. Paint sludge is recycled as fuel grade materials at off-site facilities.

Page 5 of 16 DIABLO CANYON POWER PLANT -SB14 PLAN (2014)Table 1. Total Hazardous Waste Generated and SB-14 Classification of Wastes Diablo Canyon Power Plant (Tons) -2014.CWC Waste Description Quantity Class* SB14 Hazardous (tons) Waste %123 Unspecified Alkaline Solution 0.0 18 R 0.06 1 132 Aqueous Solutions with Metals 0.215 R 0.753 133 Aqueous Solution (organic residue > 10%) 0.2 10 X 141 Off-Specification Aged or" Su'plus Inorganics 0.022 R 0.08 151 Asbestos 3.14 X 181 Inorganic Solid Waste 1.29 R 4.53 221 Waste Oil 13.28 R 46.6 223 Oil Containing Wastes 7.46 R 26.17 223 Oil Containing Wastes 10.40 N 261 Polychlorinated Biphenyls (PCBs) 0.17 X 281 Adhesives 0.24 R 0.85 291 Latex Waste 0.21 R 0.75 331 Off-Specification Aged or Surplus Organics 0.08 R 0.27 342 Organic Liquids with Metals .005 R 0.02 343 Organic Liquid Mixture .0.96 R 3.36 352 Organic Solids 2.04 R 7.16 461 Paint Sludge 2.16 R 7.58 551 Laboratory Waste Chemicals

.058 R 0.20 611 Contaminated Soil 0.27 R 0.94 725 Liquids with Mercury =>20 mg/I .003 R 0.01I 741 Halogenated Organics >1000 mg/1 0.12 R 0.40 792 Chromate Waste Water 0.077 R 0.27 Total Site Hazardous Waste Generation (Tons,) 56.74 Total SBI]4 Applicable Waste Generation (Tons) 28.50 Total SB14 Major Categoty-B Wastes (Tons) 24.94 ____Class * (Waste Type and Generation Frequency):

• R -defines wastes that are routinely generated dur'ing facility operations.

• X -defines wastes exempted from SB 14 consideration.

• N -defines wastes that are not generated from routine processes at the facility.* All wastes listed are Hazardous Wastes in accordance with Title 22 CCR Bold Text Denotes SB14 Major Category-B Wastes (5% or > Total SB14 Wastes)Page 6 of 16 DIABLO CANYON POWER PLANT -SB14 PLAN (2014)SB14 Waste Generation at Diablo Canyon Power Plant -2014* OtlaeSBl4Wastes 12.5%g Paint Sludge 7.6%o Organic$olids) 7.2%n Waste Oil 46.6%* 011 Contaanig Waste 26.2%/Figure 1. SB14 Waste Generation at Diablo Canyon Power Plant (DCPP) during 2014.Waste Oil (CWC 221)* Spent Turbine Oil, Gear Oil* Miscellaneous Petroleum Oil Lubricants 13.28 tons (total)Oil Containing Waste (CWC 223)0 0 Adsorbents, Mats, Rags, Pads Miscellaneous Oil Contaminated Materials 7.46 tons (total)Organic Solids (CWC 352)* Painting and Coating Related Solids 2.04 tons (total)Paint Sludge (CWC 461)0 0 0 Unused Mixed Paint and Solvent Off Specification Aged Paint Paint No Longer Used at the Facility 2.16 tons (total)Figure 2. Components of Major Category-B SB14 Waste Streams Generated at DCPP 2014 Page 7 of 16 DIABLO CANYON POWER PLANT -SBI4 PLAN (2014)3.6 Other Generated SB14 Wastes and Non SB14 Wastes A number of other Category-B wastes were generated at Diablo Canyon Power Plant during 2014, represented as "other SB 14 waste" in Figure-i comprising 3.56 tons or 12.5% of SB 14 waste generation.

These wastes were generated during routine plant maintenance and equipment overhaul activities, or resulted from surplus and disposal of off-specification materials stock. The contributing wastes and associated volumes are itemized in Table-i.Other minor Category-B SBl14 wastes generated during 2010 accounted for 3.56 tons and included: unspecified alkaline solutions (CWC 123); aqueous solutions with metals (CWC 132); aqueous solutions with organic residues > 10% (CWC 133); off-specification, aged, or surplus inorganics (CWC 141);Inorganic Solid Waste (CWC 181); off-specification, aged, or surplus adhesives (CWC 281); latex paint wastes (CWC 291); off-specification, aged, or surplus organics (CWC 331); organic liquids with metals (CWC 342); Organic Liquid Mixtures (CWC 343); laboratory waste chemicals (CWC 551);contaminated soil (CWC 611); liquids with mercury => 20 ppm (CWC 725), and halogenated organics (CWC 741); liquids with pH < 2 (CWC 792).Wastes exempt from SB 14 consideration were also generated at Diablo Canyon Power Plant during 2014.These SB 14 exempt and/or non-routine generated wastes totaled 28.25 tons (49.8% of total site waste generation) and included:

ethylene glycol (antifreeze) from vehicles (CWC 133); friable asbestos -SB14 exempted waste stream (CWC 151); infrequent oil equipment change out (CWC 221); oil containing ballast from an infrequent building remodels (CWC 223); oil containing waste water -non-routine waste oil generated from infrequent sump cleanout; polychiorinated biphenyl articles -SB14 exempted waste stream (CWC 261); latex paint waste (CWC 291) from very infrequent building remodels.Page 8 of 1 6 DIABLO CANYON POWER PLANT -SB14 PLAN (2014)4.0 SOURCE REDUCTION MEASURES AND EVALUATION OF SOURCE REDUCTION OPTIONS Reference Sections 5. 6, thru 5.9 of the DTSC Guidance Manual This section presents an evaluation of viable source reduction measures for each SB 14 waste stream.The following approaches were used to determine viable source reduction measures waste category: Material Input Changes Operational Improvements Production Process Changes Product Reformulation Administrative Steps -Inventory Control Employee Award Programs Employee Training In-House Policies and Guidance Corporate/Management Commitment Other Programs or Measures The following factors were evaluated for each measure!Expected Change in the Amount of Hazardous Waste Generated

-Technical Feasibility Economic Evaluation Capital Cost, Operating Cost, and Generated Waste Management Cost Retumn on Investment (ROI) or Other Economic Comparison Method Effects on Product Quality Employee Health and Safety Implications Permits, Variances, and Regulatory Compliance Schedules Applicable Local, State, or Federal Agency Requirements or Guidelines Releases and Discharges Generally, measures other than those discussed below for each specific major Category-B waste stream are not considered viable potential source reduction measures.

As other measures are identified, they will be considered and evaluated for potential feasibility, and a determination made as to whether or not the measure could also contribute to source reduction and waste minimization.

4.1 Waste

Oil (CWC 221)Source: Spent rotating equipment lubrication oil, diesel generator lubrication oil, and machinery gear oil generated from oil reservoir change-out.

Off-specification partially used containers of product and/or shelf-life expiration of materials.

Based on historical performance, the facility has likely reached a baseline of lubricating oil wastes.Source Reduction Approaches:

Increase inventory control of warehouse product oil. Efforts for reduction may include: Page 9 of 16 DIABLO CANYON POWER PLANT -SB14 PLAN (2014)*Improve material control by insuring surplus fresh oil from specific maintenance activities is returned to material stock for re-issue.*Improve employee awareness to promote source reduction and waste minimization through various mechanisms such as: 0 Training (computer based training -CBT, classroom, and on-the-job), SInformal field discussion, SWritten guidance, and 0Communication by various levels of management such as supervisor tailboard sessions with field employees.

Expected Change in the Amount of Generated Hazardous Waste: Based on the consideration factors, it is anticipated that overall reductions in routine non-outage spent or off-specification oil generation of approximately 1% may be achieved.

Generation of the waste stream is primarily driven by equipment maintenance requirements, and not discretionaliy processes.

4.2 Oil Containing Waste (CWC 223)Source: Routine equipment maintenance and cleanup using adsorbents, mats, rags, and pads.Source Reduction Approaches:

Continue efforts that have resulted in significant reductions of oil containing waste.These efforts include the following:

• Preventative maintenance of equipment, where feasible, to reduce the incidence of oil-leaks during operation.

• Evaluate rate of existing leaks and provide/place appropriately scaled volumes of absorbent materials to reduce leak control and cleanup waste generation.

• Routine inspection programs implementation such as the Spill Prevention Control and Countermeasures (SPCC) Plan inspections intended to proactively detect and evaluate equipment corrosion or other damage. Routine inspections facilitate elimination of leaks from oil filled storage and operating equipment.

• Improve employee awareness to promote source reduction and waste minimization through various mechanisms such as: 0Training (computer based training -CBT, classroom, and on-the-job), 0) Informal field discussion, 0Written guidance, and Page 10 of 16 DIABLO CANYON POWER PLANT -SB14 PLAN (2014)<)Communication by various levels of management such as supervisor and field foreman tailboard training sessions.*Continue to use sorting and consolidation to separate reusable materials, non-hazardous materials, and minimize overall oil contaminated waste volume.Expected Change in the Amount of Generated Hazardous Waste: Even with anticipated variation in routine plant practices and plant operations, ongoing reductions of approximately 3% are achievable for this waste stream. This reduction would come from continued improvement of waste minimization from all contributing sources including routine operation and maintenance of oil containing systems and equipment.

4.3 Organic

Solids (CWC 352)Source: Painting activities associated with plant equipment surface protection and corrosion inhibition effortcs.

Corrosion control related work scope resulted in significant generation of paint and solvent contaminated solids (organic solids) during 2014. Significant facility surface coating maintenance and replacement will continue due to the harsh (moist air and salt contamination) coastal environment of the location.

However, continued source reduction efforts are expected to result in less process related waste generated during the next reporting period.Source Reduction Approaches:

Continue hazardous materials inventory reduction efforts, and implement process improvements to equipment maintenance.

These efforts for reductions and process improvements include:* Consider replacing equipment used for painting, as is feasible, with more efficient devices as they become available.

• Reduction in quantity and variety of painting and coatings equipment in-use.* As they become available, replace in-use industry products with substitutes that are both environmentally superior and meet specific standards necessary for surface application and durability.

• As feasible, continue to substitute certain aerosol products with bulk coating materials that can be applied with methods that use less overall product volume, and that create lower volumes of off-specification or unused prepared/mixed material.* Improve employee awareness to promote source reduction and waste minimization through various mechanisms such as:<) Training (computer based training -CBT, classroom, and on-the-job), SInformal field discussion,<5 Written guidance, and Pagell1ofl6 DIABLO CANYON POWER PLANT -SB14 PLAN (2014) by various levels of management such as supervisor and field foreman tailboard training sessions.*Continue to use sorting and consolidation to separate reusable materials, non-hazardous materials, and minimize overall paint contaminated waste volume.*Procure surface coatings materials in appropriately sized containers for individual planned/scheduled j obs, e.g. purchase one 5-gallon container of product verse using five 1-gallons containers.

Expected Change in the Amount of Generated Hazardous Waste: Based on the consideration factors, it is expected that further reductions of approximately 3% may be achieved for this waste stream ongoing. Even with variations in contributing work activities, overall reduction should result from continued improvement of waste minimization from all contributing sources related to painting and coating work activities at the field level.4.5 Paint Sludge (CWC 461)Source: Painting activities associated with plant equipment and building corrosion protection efforts.Corrosion control activities to protect plant structures and equipment in the harsh coastal environment of the facility were conducted throughout 2014, and will continue as a significant routine plant process. However, further improvements in painting and coating materials stock inventory control are achievable.

Previous significant reductions in the generation of off-specification waste paint sludge can be attributed to successful source reduction efforts, primarily improved field level practices associated with coatings preparation, and improved product inventory management.

Continued improvements in these same source reduction efforts are expected to result in less waste generated during the next reporting period.Source Reduction Approaches:

Continue hazardous materials inventory reductions and process improvement to field level painting activities.

These efforts for reductions and process improvement include:* Consider replacing equipment used for painting as is feasible with more efficient devices as they become available.

• Continue to ensure only the volumes of paint necessaiy to complete a specific coatings task are mixed/prepared prior to implementing work.* Paint inventory minimization to reduce/eliminate expiration of stored materials.

• Reduction in quantity and variety of paints and surface coatings used at the facility.* Replace specific products with substitutes that are both environmentally superior and meet specific standards necessary for product application, as they become available.

• Improve employee awareness to promote source reduction and waste minimization through various mechanisms such as:<? Training (computer based training -CBT, classroom, and on-the-job), Page 12 of 16 DIABLO CANYON POWER PLANT -SB14 PLAN (2014)0Informal field discussion, 0 Written guidance, and 0 Communication by various levels of management such as supervisor and field foreman tailboard training sessions.*Continue to use sorting and consolidation to separate reusable material and minimize overall waste generated.

Expected Change in the Amount of Generated Hazardous Waste: Based on the consideration factors, it is expected that further reductions of approximately 3% are achievable for this waste stream ongoing. Even with variations in contributing work activities, reduction should result from continued improvement in waste minimization from all contributing sources involved including materials inventory management and surface coating related work activities at the field level.Page 13 of 16 DIABLO CANYON POWER PLANT -SBl4 PLAN (2014)5.0 IMPLEMENTATION SCHEDULE Reference Section 5.10 of the DTSC Guidance Manual Review of source reduction measures available provides a variety of ongoing' recommendations with potential to achieve further reductions in overall waste generation.

These recommendations are dependent on the primary waste sources and related plant processes contributing to individual waste streams (Section 4.0). A summary of proposed source reduction measure implementation to achieve the target reductions ongoing for each waste stream are presented in the following table.Table 2. Summary of Proposed Actions Associated with Source Reduction Measures.CWC Waste Source Reduction Measure -Implementation 221 Waste Oil As described in Section 4.0 9/20 16 223 Oil Containing Waste As described in Section 4.0 9/2016, 352 Organic Solids As described in Section 4.0 6/20 16 461 Paint Sludge As described in Section 4.0 812016 Page 14 of .16 DIABLO CANYON POWER PLANT -SB14 PLAN (2014)6.0 HAZARDOUS WASTE REDUCTION NUMERICAL GOAL Reference Section 5.11 of the DTSC Guidance Manual Hazardous waste generators are required, by SB 1726, to develop a four-year numerical (percent) source reduction goal in the first Quadrennial Review and Plan, and every Quadrennial Review and Plan thereafter.

For Diablo Canyon Power Plant, establishing the source reduction goal from 2014 baseline generation has inherent uncertainty due to ongoing changes in facility operations and unpredictable variations in overall electric generation business activities within California.

Even with inherent uncertainty in future plant operations; a 5% reduction in overall SB 14 hazardous waste generation fr'om current reporting year levels (2014) is reasonably achievable.

This numerical goal was established with consideration of the potential impacts of scheduled capital improvement projects, potential for changes in routine electric generation operations of Diablo Canyon Power Plant, potential for increased routine scheduled plant maintenance or forced maintenance outages, and the inherent uncertainty of overall electric generation supply operations.

The 5% numerical goal, equivalent to 1.42 tons of routine SB 14 applicable waste generation, is based on the following source reduction projection:

Total Weight of SB 14 Waste (Hazardous and Extremely Hazardous Waste) Generation Reduced at the Site by Optimizing Source Reduction Practices.

x 100 Total Weight of SB 14 Waste (Hazardous and Extremely Hazardous Waste) Generation if Source Reduction Measures Not Implemented.

or (1.42 tons / 28.4963 tons) X 100 = 5.0%Page 15 of 16 DIABLO CANYON POWER PLANT -SB14 PLAN (2014)7.0 CERTIFICATION Reference Section 5.12 of the DTSC Guidance Manual Technical Certification for the Review and Plan I certify that the review and plan meets the requirements of 22CCR § 67100.13(b)(1) through 67100.13 (b)(4)regarding the identification of routinely generated maj or hazardous waste streams, source reduction approaches, feasible and economically practicable reduction measures, and avoiding practices that would increase emission or discharges to air, water, or land.Kenneth Cortese _______________

Chemistry and Environmental Manager Signature Pacific Gas & Electric Company ______________

Diablo Canyon Power Plant Date Financial Certification for the Review and Plan I certify that this document and all attachments were prepared under my direction or supervision in accordance with a system designed to assure that qualified personnel properly gather and evaluate the information submitted.

Based on my inquity of the person or persons who manage the system, or the persons directly responsible for gathering the information, the information submitted is, to the best of my knowledge and belief, true, accurate and complete.

I am aware that there are significant penalties for making false statements or representations to the Department, including the possibility of fines for criminal violations.

Jan A. Nimick________________

Station Director Signature Pacific Gas & Electric Company ______________

Diablo Canyon Power Plant Date Page 16 of 16 120 DCPP Hazardous Waste Volume Trends 1994-2014 100 I Aggregate Haz Waste Volume in Tons -St ate SB14 Quadrennial Reporting Years* Total Site HazWaste* SB14 Waste Streams 80 1--Note: 2014 SB14 Reporting Year Included 2 Scheduled Unit Re-Fueling Outages & 4 Forced Unit Outages.60 1 40 I--20I--0 1994 1998 191982002 200620004 2010 2014