UNISOURCE ENERGY, INC.

UNIPAR?120 KS                            Page 1 of 5









                  MATERIAL SAFETY DATA SHEET

SECTION 1                                      PRODUCT AND COMPANY IDENTIFICATION



                            PRODUCT NAME                UNIPAR?120 KS



                         CHEMICAL FAMILY                Petroleum Hydrocarbon



               COMPANY IDENTIFICATION                   UniSource Energy, Inc.

                                                        245 W. Roosevelt Road, Building 14, Suite 145

                                                        West Chicago, IL 60185

                                                        Phone: 630-231-7990 Fax: 630-231-8036



    EMERGENCY TELEPHONE NUMBERS                         UniSource Energy, Inc.           CHEMTREC

                                                          1-800-444-5510               1-800-424-9300





SECTION 2                                       COMPOSITION / INFORMATION ON INGREDIENTS



         CAS Number                      Material or Component                                  % By Weight

          64742-58-1            HYDROTREATED SPENT PARAFFINIC BASE OIL                              100



SECTION 3                                       HAZARDS IDENTIFICATION



EMERGENCY OVERVIEW

     SLIGHTLY COMBUSTIBLE LIQUID AND WILL BURN.

     HEATED VAPORS IN PRESENCE OF IGNITION SOURCE CAN BE EXPLOSIVE IF CONFINED.

     OVEREXPOSURE MAY CAUSE IRRITATION TO SKIN, EYES AND RESPIRATORY TRACT.

     MAY BE HARMFUL IF SWALLOWED.

ROUTES OF ENTRY: Absorbed through dermal contact, eye contact, inhalation, ingestion.

POTENTIAL ACUTE HEALTH EFFECTS

        Eyes: Practically non-irritating to eyes. No effect expected.

        Skin: Prolonged unprotected exposure will cause skin irritation.

        Inhalation: Under normal conditions, inhalation is not expected to be a problem. However, respiratory

         tract irritation may occur if exposed to fumes or mist.

        Ingestion: Relatively non-toxic by ingestion. This product has laxative properties and may result in

        abdominal cramps and diarrhea

POTENTIAL CHRONIC HEALTH EFFECTS

        Carcinogenic Effects

        Not listed by NTP, IARC, OSHA or ACGIH as carcinogenic.

MEDICAL CONDITIONS AGGRAVATED BY OVEREXPOSURE

        Personnel with pre-existing skin disorders should avoid contact with this product.

        Health studies have shown that many petroleum hydrocarbons pose potential human health risks which may

        vary from person to person. Exposure to liquids, vapors, mists, or fumes should be minimized.



(See Toxicological Information ?Section 11)



SECTION 4                                      FIRST AID MEASURES



EYE CONTACT: Flush thoroughly with water while holding eyelids open. Remove contact lenses, if worn, after

      initial flushing, and continue flushing for at least 15 minutes. If irritation occurs, get medical

      attention.

SKIN CONTACT: Wash contact areas immediately with soap and water. Remove contaminated clothing and

      place in closed container for storage until laundered or discarded. Thoroughly clean contaminated clothing

      before reuse.

INHALATION: Allow the victim to rest in a well-ventilated area. Seek immediate medical attention.

INGESTION: Do not induce vomiting. Aspiration into lungs may cause lung damage. Seek medical attention.

NOTES TO PHYSICIAN: Not available

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UNIPAR?120 KS                               Page 2 of 5









SECTION 5                                         FIRE FIGHTING MEASURES



FLAMMABILITY CLASS: IIIB

FLASH POINT: > 165C (> 329F)

FLAMMABLE LIMITS: Not available

PRODUCTS OF COMBUSTION: May produce incomplete combustion products (CO, CO2).

FIRE AND EXPLOSION HAZARDS

         If heated above its flash point, product will release flammable vapors which can burn in the open or be

         explosive in confined spaces if exposed to ignition source. Mists or sprays may be flammable below normal

         flash point. Keep away from extreme heat or open flame.

EXTINGUISHING MEDIA

         Use water fog or spray, foam, dry chemical or carbon dioxide (CO2) to extinguish flames.

FIRE FIGHTING INSTRUCTIONS

         Evacuate area. Prevent runoff from fire control or dilution from entering streams, sewers, or drinking water

         supply. Use water spray to cool fire exposed surfaces and to protect personnel.

         Small Fire: Use DRY chemical powder, halon, and CO2.

         Large Fire: Use water spray, fog or foam. DO NOT use water jet.

PROTECTIVE CLOTHING (FIRE)

         Wear MSHA/NIOSH approved self-contained breathing apparatus or equivalent and full

         protective gear (Bunker gear).

NFPA HAZARD ID

         Health: 1         Fire Hazard: 1            Reactivity: 0                  Special Notice: None

HMIS HAZARD ID

         Health: 1         Flammability: 1           Physical Hazard : 0            Personal Protection: None



SECTION 6                                         ACCIDENTAL RELEASE MEASURES



NOTIFICATION PROCEDURES

         U.S. regulations may require reporting releases of this material to the environment which exceed the

         reportable quantity or oil spills which could reach any waterway including intermittent dry creeks. Report

         spills to local authorities and/or the National Response Center at (800) 424-8802 as appropriate or required.

PROTECTIVE MEASURES

         Avoid contact with spilled material. Warn or evacuate occupants in surrounding area. Eliminate all

         (potential) sources of ignition in the vicinity of the spill or released vapor. Handling equipment must be

         grounded to prevent sparking.

SPILL MANAGEMENT

         Land Spill: Eliminate all ignition sources (no smoking, flares, sparks or flames in immediate area). Stop

         leak if it can be done without risk. All equipment used when handling the product must be grounded. Do not

         touch or walk through spilled material. Prevent entry into waterways, sewers, basements or confined areas.

         A vapor suppressing foam may be used to reduce vapors. Use clean non-sparking tools to collect absorbed

         material. Absorb or cover with dry earth, sand or other non-combustible material and transfer to containers.

         Water Spill: Stop leak if it can be done without risk. Confine the spill immediately with booms. Warn other

         vessels. Remove from the surface by skimming or with suitable absorbents. Report spills as required to

         appropriate authorities. Seek the advice of a specialist before using dispersants.

ENVIRONMENTAL PRECAUTIONS

        Large Spills: Contain spill and safely stop the flow, warning personnel to stay away. Eliminate all sources

        of ignition and ventilate. Dike far ahead of liquid spill for later recovery and disposal. Prevent entry into

        waterways, sewers, basements or confined areas. Water spray may reduce vapor, but may not prevent

        ignition in closed spaces. Recover with appropriate pumping equipment or with suitable absorbent.

        Small Spills: Absorb with an inert material such as clay or sand. Place in appropriate non-leaking

        container. Seal tightly for proper disposal.

Note: Local regulations may prescribe or limit action to be taken.



SECTION 7                                         HANDLING AND STORAGE



HANDLING

         Keep away from heat. Keep away from sources of ignition. Ground all equipment containing material.

         Ground lines and equipment used during transfer to reduce the possibility of static spark-initiated fire or

         explosion. Use non-sparking tools. Keep away from incompatibles such as oxidizing agents.

         Do not attempt to refill or clean containers since residue is difficult to remove.

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UNIPAR?120 KS                           Page 3 of 5







       DO NOT ingest. Do not breathe gas, fumes, vapor, or spray. Do not eat, drink or smoke in areas of use or

       storage. In case of insufficient ventilation, wear suitable respiratory equipment. If ingested, seek medical

       advice immediately, showing them the container or the label. Avoid contact with skin and eyes.

       Use good personal hygiene practices. Wash thoroughly after handling this product.

STORAGE

       Combustible materials should be stored in a separate labeled safety storage cabinet or room. Keep away

       from heat and all possible sources of ignition. Keep container tightly closed and dry. Keep in a cool and

       well-ventilated area. Ground all equipment containing material. Empty containers may contain material

       residue; do not reuse without adequate precautions. Do not eat, drink or smoke in areas of use or storage.

       All efforts should be made to prevent any leaks or spills. Storage tanks containing this product should be

       engineered to prevent contact with water resources, as this material could contaminate the water resources.

       Surface spills can reach groundwater through porous soil or cracked surfaces. The storage tanks should be

       monitored regularly for leaks. Where spills or leaks are possible, a comprehensive response plan should be

       developed and implemented.



SECTION 8                                     EXPOSURE CONTROLS / PERSONAL PROTECTION



ENGINEERING CONTROLS

       Provide exhaust ventilation or other engineering controls to keep the airborne concentrations of

       vapors below their respective threshold limit value. Ensure that eyewash stations and safety

       showers are proximal to the work-station location.

PERSONAL PROTECTION

       Eyes: Safety glasses with side shields.

       Body: Flame retardant clothing covering the entire body

       Respiratory: Use a MSHA/NIOSH approved respirator or equivalent at high concentrations.

       Hands: Chemical resistant gloves if contact is possible.

       Feet: Safety slip-proof shoes in areas where spills or leaks can occur.

PROTECTIVE CLOTHING

       Splash goggles, Full suit, Vapor respirator, Boots, Gloves.

       A self-contained breathing apparatus should be used to avoid inhalation of the product. Suggested

       protective clothing might not be sufficient; consult a specialist BEFORE handling this product.

THRESHOLD LIMIT VALUE

       The best practice is to maintain concentrations of all atmospheric contaminants as low as practical using

       engineering controls and work rules. Appropriate personal protective equipment may be used for additional

       protection of the worker from exposure. For application of TLV's or PEL's consult an industrial hygienist.



                         Material or Component                                     Exposure Limits

                                                                          ACGIH, OSHA, NIOSH

          HYDROTREATED SPENT PARAFFINIC BASE OIL                            TWA: 5 mg/m?br>
                                                                            STEL: 10 mg/m?br>


    Consult local authorities for acceptable exposure limits.



SECTION 9                                      PHYSICAL AND CHEMICAL PROPERTIES



PHYSICAL STATE AND APPEARANCE: Liquid

ODOR: Petroleum

COLOR: Amber

SPECIFIC GRAVITY: 0.87 (Water = 1)

VAPOR PRESSURE: < 0.1 mm Hg @ 20C ( 68F)

BOILING POINT: > 129.5C ( < 265F)

VISCOSITY: > 20 cSt @ 40C

POUR POINT: - 3C ( 27F)



SECTION 10                                     STABILITY AND REACTIVITY



STABILITY AND REACTIVITY: The product is stable under normal conditions.

CONDITIONS TO AVOID: Sources of ignition.

INCOMPATIBILITY WITH VARIOUS SUBSTANCES: Reactive/ incompatible with oxidizing agents.

HAZARDOUS DECOMPOSITION PRODUCTS: May produce incomplete combustion products (COx)

HAZARDOUS POLYMERIZATION: No

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UNIPAR?120 KS                            Page 4 of 5









SECTION 11                                      TOXICOLOGICAL INFORMATION



ROUTES OF EXPOSURE: Inhalation, ingestion, skin, eye contact.

ACUTE AND CHRONIC TOXICITY

       Oral LD50: > 2,000 mg/kg [Rat]

       Dermal LD50: >2,000 mg/kg [Rat]

       Dermal LD50: >4,480 mg/kg [Rabbit]

OTHER TOXIC EFFECTS ON HUMANS

       May be irritating to eyes, skin and respiratory system. Aspiration hazard if swallowed. Can enter lungs and

       cause damage.

       (See Section 3 ?Hazards Identification)

TOXICOLOGICAL DATA

       In accordance with the current OSHA Hazard Communication Standard criteria, this product does not

       require a cancer hazard warning.



SECTION 12                                      ECOLOGICAL INFORMATION



ECOTOXICITY

      Aquatic Toxicity

              96-Hr LC 50 Brachydanio: 79.6 mg/L (semi-static conditions)

              96-Hr LC 50 Pimephales proelas: 3.2 mg/L (semi-static conditions)

MOBILITY: No information available

SPECIAL REMARKS ON THE PRODUCTS OF BIODEGRADATION: No information available





SECTION 13                                      DISPOSAL CONSIDERATIONS



WASTE DISPOSAL

       Disposal can occur only in properly permitted facilities in accordance with federal, state, and local

       regulations.

       Chemical additions, processing or otherwise altering this material may make the waste management

       information presented in this MSDS incomplete. This material, when discarded or disposed of, may be a

       hazardous waste according to Federal Regulations (40 CFR 261). Under the Resource Conservation and

       Recovery Act (RCRA), it is the responsibility of the user of the material to characterize and determine, at the

       time of disposal, whether the material is a hazardous waste subject. Disposal of this product, solutions and

       any by-products should at all times comply with the requirements of environmental protection and waste

       disposal legislation and any regional local authorities.



Consult your local or regional authorities.





SECTION 14                                      TRANSPORT INFORMATION



U.S. DOT CLASSIFICATION FOR BULK SHIPMENTS: Not regulated



SECTION 15                                      REGULATORY INFORMATION



U.S. FEDERAL REGULATIONS



       TSCA: All components are listed or exempted.



       CERCLA: No chemicals in this product are subject to reporting requirements.



       SARA 302/304/313: No components are listed.



       SARA 311/312

                 The following chemicals in this product require reporting under the requirements of 40

                 CFR 370, Hazardous Chemical Reporting: Community Right-To-Know. The hazard

                 category for each chemical is also listed.

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UNIPAR?120 KS                             Page 5 of 5







                                                Immediate    Delayed      Fire     Pressure    Reactivity

                  Chemical Name                   Hazard     Hazard      Hazard    Hazard       Hazard

                  HYDROTREATED

                 SPENT PARAFFINIC                    x            x          -          -            -

                     BASE OIL



INTERNATIONAL REGULATIONS



         CANADA

              WHMIS: Not controlled



         INTERNATIONAL INVENTORY LISTS

               Canadian Inventory (DSL): This product is listed.



STATE REGULATIONS



         California Prop. 65 (no significant risk level): This product may contain detectable amounts of the following

         chemical or chemicals known to the state of California to cause cancer, birth defects or other reproductive

         harm:

                       Chemical                                   CAS No.

                  BENZO(A)ANTHRACENE                              56-55-3

                  BENZO(K)FLUORANTHENE                            207-08-9

                  BENZO(A)PYRENE                                  50-32-8

                  BENZO(B)FLUORANTHENE                            205-99-2

                  CHRYSENE                                        218-01-9

                  DIBENZ(A,H)ANTHRACENE                           53-70-3

                  INDENO(1,2,3-CD)PYRENE                          193-39-5



SECTION 16                                       OTHER INFORMATION



REVISIONS

         This Material Safety Data Sheet (MSDS) has been created to fully comply with the guidance contained in the

         ANSI MSDS standard (ANSI Z400.1-1998).





DATE PREPARED: APRIL 2009                                                                      UNIPAR?120 KS





The information presented herein has been compiled from sources considered to be dependable and is accurate as

of the date of preparation of this Material Safety Data Sheet. However, Seller does not assume any liability

whatsoever for the accuracy or completeness of the information contained herein. Final determination of suitability of

any material is the sole responsibility of the user. All materials may present unknown hazards and should be used

with caution. In addition, no responsibility can be assumed by the Seller for any damage or injury resulting from

abnormal use, from any failure to adhere to recommended practices, or from any hazards inherent in the nature of

the material. Seller assumes no responsibility for injury to Buyer or to third persons or any damage to any property.

Buyer assumes all such risks.