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Home My WebLink AboutFire Report_RedactedNFIRS -1 Basic 40060 CA 06 21 2025 Fire Station 3 (FS3) 25-03744 0 FDID State Month Day Year Station Number Exposure Location Type Census tract: Street Address Intersection In Front Of Rear Of Adjacent To Directions US National Grid 883 BOUGAINVILLEA Number Prefix Street or Highway Street Type Suffix San Luis Obispo CA 93401 Apt./Suite/Room City State Zip Code Cross Street Incident Type 111-Structure Fire Aid Given Or Received 1 Mutual Aid Received 2 Auto. Aid Received 3 Mutual Aid Given 4 Auto. Aid Given 5 Other Aid Given None CALFIRE (40080) Their FDID Their State Their Incident Number Dates and Times Alarm 06 21 2025 00:02 Arrival 06 21 2025 00:09 Controlled 06 21 2025 00:17 Last Unit Cleared 06 21 2025 02:35 Shifts and Alarms B 1 FZ3 Shift or Platoon Alarms District Special Studies 9244 3 - No, COVID 19 was not a factor ID#Value Actions Taken 11-Extinguishment by fire service personnel Primary Action Taken Resources Apparatus or Personnel Module is used. Apparatus Personnel Suppression 6 15 EMS 0 0 Other 1 1 Resource counts include aid received resources. Estimated Dollar Losses and Values Losses:Required for all fires if known. Optional for all non-fires. None Property:$ 62,198.00 Contents:$ 46,649.00 Pre-Incident Values: Optional None Property:$ 248,793.00 Contents:$ 186,595.00 A B C D E1 E2 E3 F G1 G2 Page 1 of 14 Completed Modules 2 - Fire 3 - Structure Fire 4 - Civilian Fire Cas. 5 - Fire Service Cas. 6 - EMS 7 - HazMat 8 - Wildland Fire 9 - Apparatus 10 - Personnel 11 - Arson Casualties None Deaths Injuries Fire Service 0 0 Civilian 0 0 Detector Required for Confined Fires 1 - Detector Alerted Occupants 2 - Detector Did Not Alert Them 3 - Unknown Hazardous Materials Release 1 - Natural Gas 2 - Propane Gas 3 - Gasoline 4 - Kerosene 5 - Diesel Fuel / Fuel Oil 6 - Household Solvents 7 - Motor Oil 8 - Paint 0 - Other None Mixed Use Property Not Mixed 10 - Assembly Use 20 - Education Use 33 - Medical Use 40 - Residential Use 51 - Row Of Stores 53 - Enclosed Mall 58 - Business and Residential 59 - Office Use 60 - Industrial Use 63 - Military Use 65 - Farm Use 00 - Other Mixed Use Property Use None Structures 131 Church, Place of Worship 161 Restaurant or Cafeteria 162 Bar/Tavern or Nightclub 213 Elementary School, Kindegarten 215 High School, Junior High 241 College, Adult Education 311 Nursing Home 331 Hospital 341 Clinic, Clinic-Type Infirmary 342 Doctor/Dentist Office 361 Prison or Jail, Not Juvenile 419 1- or 2-Family Dwelling 429 MultiFamily Dwelling 439 Rooming/Boarding House 449 Commerical Hotel or Motel 459 Residential, Board and Care 464 Dormitory/Barracks 519 Food and Beverage Sales 539 Household Goods, Sales, Repairs 571 Gas or Service Station 579 Motor Vehicle/Boat Sales/Repairs 599 Business Office 615 Electric-Generating Plant 629 Laboratory/Science Laboratory 700 Manufacturing Plant 819 Livestock/Poultry Storage (Barn) 882 Non-Residential Parking Garage 891 Warehouse Outside 124 Playground or Park 655 Crops or Orchard 669 Forest (Timberland) 807 Outdoor Storage Area 919 Dump or Sanitary Landfill 931 Open Land or Field 936 Vacant Lot 938 Graded/Cared for Plot of Land 946 Lake, River, Stream 951 Railroad Right-of-Way 960 Other Street 961 Highway/Divided Highway 962 Residential Street/Driveway 981 Construction Site 984 Industrial Plant Yard Property Use: Description Look up and enter a Property Use code and description only if you have NOT checked a Property Use box. Owner Local Option Person/Entity Type Business Name (if applicable)Phone Number Mr., Ms., Mrs.First Name MI Last Name Suffix Number Prefix Street or Highway Street Type Suffix Post Office Box Apt./Suite/Room City State Zip Code Remarks: E3 assigned to fire attack by Bougainvillea IC with E21 to assist. E3 found moderate smoke throughout the structure with multiple smoke alarms sounding. E3 and E21 proceeded down the left hallway with a 1 3/4' line where we found the laundry area on fire. The fire was quickly knocked down followed by a primary search which was clear. E3 and other units on scene then transitioned to salvage and overhaul. E3 remained on scene to assist PRV21 for cause and origin investigation. The house was secured by the occupants and E3 cleared. H1 H2 H3 I J K2 L Page 2 of 14 Authorization 62800 MacDonald, John 06/21/2025 Officer In Charge ID Signature Position or Rank Assignment Date 92710 Witt, James Fire Fighter 06/21/2025 Member Making Report ID Signature Position or Rank Assignment Date M Page 3 of 14 NFIRS -2 Fire 40060 CA 06 21 2025 Fire Station 3 (FS3) 25-03744 0 FDID State Month Day Year Station Number Exposure Property Details B1 1 Not Residential Estimated number of residential living units in the building of origin whether or not all units became involved B2 Buildings Not Involved Number of buildings involved B3 None Less than 1 acre Acres burned (outside fires) On-Site Materials Or Products On-Site Materials Storage Use Ignition D1 01-Hallway corridor, mall Area of Fire Origin D2 12-Radiated or conducted heat from operating equipment Heat Source D3 30-Soft goods, wearing apparel, other Item First Ignited D4 71-Fabric, fiber, cotton, blends, rayon, wool Type of Material First Ignited Cause of Ignition 1 - Intentional 2 - Unintentional 3 - Failure of Equipment or Heat Source 4 - Act of Nature 5 - Cause Under Investigation U - Cause Undetermined After Investigation Factors Contributing to Ignition 55-Failure to clean Factor Contributing to Ignition Human Factors Contributing to Ignition Check all applicable boxes None 1 - Asleep 2 - Possibly impaired by alcohol or drugs 3 - Unattended person 4 - Possibly Mentally Disabled 5 - Physically Disabled 6 - Multiple Persons Involved 7 - Age Was A Factor Estimated Age of Person Involved Male Female Equipment Involved In Ignition Equipment Involved Brand Model Serial # Year Equipment Power Source Equipment Power Source Equipment Portability 1 - Portable 2 - Stationary Portable equipment normally can be moved by one or two persons. Fire Suppression Factors Mobile Property Involved 1 - Not involved in ignition, but burned 2 - Involved in ignition, but did not burn 3 - Involved in ignition and burned None Mobile Property Type and Make Mobile Property Type Mobile Property Make Local Use Pre-Fire Plan Available Arson Report Attached Police Report Attached Coroner Report Attached Other Reports Attached Mobile Property Model Year State License Plate Number VIN _________________________ _________________________ _________________________ _________________________ _________________________ _________________________ A B C D E1 E2 E3 F1 F2 F3 G H1 H2 Page 4 of 14 NFIRS -3 Structure Fire Structure Type 1 - Enclosed Building 2 - Portable/Mobile Structure 3 - Open Structure 4 - Air-Supported Structure 5 - Tent 6 - Open Platform 7 - Underground Structure 8 - Connective Structure 0 - Other Building Status 1 - Under Construction 2 - In Normal Use 3 - Idle, Not Routinely Used 4 - Under Major Renovation 5 - Vacant and Secured 6 - Vacant and Unsecured 7 - Being Demolished 0 - Other U - Undetermined Building Height 1 Number of Stories At/Above Grade 0 Number of Stories Below Grade Main Floor Size 2142 Total Square Feet OR BY Length (ft) X Width (ft) Fire Origin 1 Below Grade Story of Fire Origin Fire Spread Confined to Object of Origin 2 - Confined to Room of Origin 3 - Confined to Floor of Origin 4 - Confined to Building of Origin 5 - Beyond Building of Origin Number of Stories Damaged By Flame Number of Stories w/Minor Damage (1-24%) Number of Stories w/Significant Damage (25-49%) Number of Stories w/Heavy Damage (50-74%) Number of Stories w/Extreme Damage (75-100%) *Count the roof as part of the highest story Type of Material Contributing Most to Flame Spread K1 Item Contributing Most to Flame Spread K2 Type of Material Contributing Most To Flame Spread Presence of Detectors N - None Present 1 - Present U - Undetermined Detector Type 1 - Smoke 2 - Heat 3 - Combination of Smoke and Heat 4 - Sprinkler, Water Flow Detection 5 - More Than One Type Present 0 - Other U - Undetermined Detector Power Supply 1 - Battery Only 2 - Hardwire Only 3 - Plug-In 4 - Hardwire With Battery 5 - Plug-In With Battery 6 - Mechanical 7 - Multiple Detectors & Power Supplies 0 - Other U - Undetermined Detector Operation 1 - Fire Too Small To Activate 2 - Operated 3 - Failed To Operate U - Undetermined Detector Effectiveness 1 - Alerted Occupants, Occupants Responded 2 - Alerted Occupants, Occupants Failed to Respond 3 - There Were No Occupants 4 - Failed to Alert Occupants U - Undetermined Detector Failure Reason 1 - Power Failure, Shutoff, or Disconnect 2 - Improper Installation or Placement 3 - Defective 4 - Lack of Maintenance, Dirty 5 - Battery Missing or Disconnected 6 - Battery Discharged or Dead 0 - Other U - Undetermined I1 I2 I3 I4 J1 J2 J3 K L1 L2 L3 L4 L5 L6 Page 5 of 14 Presence of Automatic Extinguishing System N - None Present 1 - Present 2 - Partial System Present U - Undetermined Type of Automatic Extinguishing System 1 - Wet-Pipe Sprinkler 2 - Dry-Pipe Sprinkler 3 - Other Sprinkler System 4 - Dry Chemical System 5 - Foam System 6 - Halogen-Type System 7 - Carbon Dioxide System 0 - Other U - Undetermined Required if fire was within designed range of AES Operation of Automatic Extinguishing System 1 - Operated/Effective 2 - Operated/Not Effective 3 - Fire Too Small To Activate 4 - Failed To Operate 0 - Other U - Undetermined Required if fire was within designed range Number of Sprinkler Heads Operating Required if system operated Reason for Automatic Extinguishing System Failure 1 - System Shut Off 2 - Not Enough Agent Discharged 3 - Agent Discharged But Did Not Reach Fire 4 - Wrong Type of System 5 - Fire Not In Area Protected 6 - System Components Damaged 7 - Lack of Maintenance 8 - Manual Intervention 0 - Other U - Undetermined Required if system failed or not effective M1 M2 M3 M4 M5 Page 6 of 14 NFIRS -9 Apparatus or Resources 40060 CA 06 21 2025 Fire Station 3 (FS3) 25-03744 0 FDID State Month Day Year Station Number Exposure B Apparatus/Resource Dates/Times Sent Number of People Apparatus Use Actions Taken ID:BC2 Type:92-Chief officer car Dispatch:06/21/2025 00:02 Arrival:06/21/2025 00:09 Clear:06/21/2025 02:05 Sent 1 Suppression EMS Other 81-Incident command ID:E2 Type:11-Engine Dispatch:06/21/2025 00:02 Arrival:06/21/2025 00:13 Clear: Sent 3 Suppression EMS Other 92-Standby ID:E3 Type:11-Engine Dispatch:06/21/2025 00:02 Arrival:06/21/2025 00:10 Clear:06/21/2025 02:34 Sent 3 Suppression EMS Other 11-Extinguishment by fire service personnel ID:E4 Type:11-Engine Dispatch:06/21/2025 00:02 Arrival:06/21/2025 00:12 Clear:06/21/2025 01:21 Sent 3 Suppression EMS Other 12-Salvage & overhaul ID:MR1 Type:70-Medical & rescue unit, other Dispatch:06/21/2025 00:02 Arrival:06/21/2025 00:09 Clear:06/21/2025 02:35 Sent 2 Suppression EMS Other 12-Salvage & overhaul ID:PRV21 Type:00-Other apparatus/resource Dispatch: Arrival:06/21/2025 01:44 Clear:06/21/2025 02:35 Sent 1 Suppression EMS Other 86-Investigate ID:T1 Type:12-Truck or aerial Dispatch:06/21/2025 00:02 Arrival:06/21/2025 00:10 Clear:06/21/2025 01:23 Sent 3 Suppression EMS Other 12-Salvage & overhaul A Page 7 of 14 NFIRS -10 Personnel 40060 CA 06 21 2025 Fire Station 3 (FS3) 25-03744 0 FDID State Month Day Year Station Number Exposure A Page 8 of 14 B Apparatus/Resource Dates/Times Sent Number of People Apparatus Use Actions Taken ID:BC2 Type:92-Chief officer car Dispatch:06/21/2025 00:02 Arrival:06/21/2025 00:09 Clear:06/21/2025 02:05 Sent 1 Suppression EMS Other 81-Incident command Personnel ID Name Rank Role Attend Actions Taken 62800 MacDonald, John Battalion Chief ID:E2 Type:11-Engine Dispatch:06/21/2025 00:02 Arrival:06/21/2025 00:13 Clear: Sent 3 Suppression EMS Other 92-Standby Personnel ID Name Rank Role Attend Actions Taken 25944 Child, Robert Captain 99161 Hutslar, Dane Engineer 99164 Sabatino, Jacob Firefighter ID:E3 Type:11-Engine Dispatch:06/21/2025 00:02 Arrival:06/21/2025 00:10 Clear:06/21/2025 02:34 Sent 3 Suppression EMS Other 11-Extinguishment by fire service personnel Personnel ID Name Rank Role Attend Actions Taken 46543 Hicks, Judson Firefighter 36520 Gatton, Christopher Engineer 92710 Witt, James Captain ID:E4 Type:11-Engine Dispatch:06/21/2025 00:02 Arrival:06/21/2025 00:12 Clear:06/21/2025 01:21 Sent 3 Suppression EMS Other 12-Salvage & overhaul Personnel ID Name Rank Role Attend Actions Taken 109136 Emerson, Luke Firefighter 46955 Hoover, Nicholas Captain 54183 King, John Engineer ID:MR1 Type:70-Medical & rescue unit, other Dispatch:06/21/2025 00:02 Arrival:06/21/2025 00:09 Clear:06/21/2025 02:35 Sent 2 Suppression EMS Other 12-Salvage & overhaul Personnel ID Name Rank Role Attend Actions Taken 99163 Martin, Ted 12-Salvage & overhaul 109138 Van De Walker, Gegi 12-Salvage & overhaul ID:PRV21 Type:00-Other apparatus/resource Dispatch: Arrival:06/21/2025 01:44 Clear:06/21/2025 02:35 Sent 1 Suppression EMS Other 86-Investigate Personnel ID Name Rank Role Attend Actions Taken 98956 Bliss, Matheson 5588015-Inspector Page 9 of 14 ID:T1 Type:12-Truck or aerial Dispatch:06/21/2025 00:02 Arrival:06/21/2025 00:10 Clear:06/21/2025 01:23 Sent 3 Suppression EMS Other 12-Salvage & overhaul Personnel ID Name Rank Role Attend Actions Taken 100076 McClanahan, Maren Engineer 70100 Polkow, Matthew Captain 90841 Weis, Trevor Engineer Page 10 of 14 NFIRS -1S Supplemental 40060 CA 06 21 2025 Fire Station 3 (FS3) 25-03744 0 FDID State Month Day Year Station Number Exposure Primary Narrative: E3 assigned to fire attack by Bougainvillea IC with E21 to assist. E3 found moderate smoke throughout the structure with multiple smoke alarms sounding. E3 and E21 proceeded down the left hallway with a 1 3/4' line where we found the laundry area on fire. The fire was quickly knocked down followed by a primary search which was clear. E3 and other units on scene then transitioned to salvage and overhaul. E3 remained on scene to assist PRV21 for cause and origin investigation. The house was secured by the occupants and E3 cleared. Additional Narrative (#1 of 5): E4 assigned to fire attack with E3 by IC. Assisted with overhaul, investigation and removal of debris. E4 donned SCBA packs, entered the structure to find E3 and E21 had already extinguished the fire. Hand tools were used to expose all burned areas in the hallway where the washer and dryer were located. No additional smoke or fire noted, both machines were removed from the residence. E4 was released by IC without further incident. Additional Narrative (#2 of 5): BC 2 responded to the above location for a report of a structure fire. On arrival, I established command and provided an on-scene report. All occupants were reported out of the structure, and there was light smoke coming from the structure. I assigned E3 fire attack, with E21 (Cal Fire) assisting E3. I assigned T1 to ventilation, E4 to back up E3. E2 was assigned utilities, and to confirm that E21 had a water supply. E3 provided a 360-degree condition report and knocked down the fire quickly. All crews were then assigned to overhaul and salvage. Inspector Bliss responded and conducted the investigation. See Inspector Bliss's report for investigation findings. All units were released, and E3 remained at the scene to assist Inspector Bliss in the investigation. Once complete, the home was secured by the occupants. The occupants of the home were offered Red Cross assistance because the home sustained smoke damage throughout the structure. The occupants declined Red Cross assistance. Additional Narrative (#3 of 5): E2 assigned to secure utilities, elect./gas. E2 donned PPE and SCBA and completed assignment. E2 released by IC to respond to medical. Additional Narrative (#4 of 5): Truck 1 arrived on scene and received assignment of IC as Vent group. Truck 1 set up for vertical ventilation and changed tactics to horizontal ventilation at the front door. Truck 1 joined E3 and E4 with salvage and overhaul. Truck 1 was released by IC. A Page 11 of 14 Additional Narrative (#5 of 5): SLO FD FIRE ORIGIN & CAUSE INVESTIGATION REPORT DATE: 06/21/2025, 0200 Hours LOCATION: 883 Bougainvillea St., San Luis Obispo, CA 93401 PROPERTY TYPE: Residential CLASSIFICATION: Accidental INCIDENT #: SLO-FD 25-03744 REPORTING OFFICER: BLISS, MATTIE; FIRE INVESTIGATOR (PREV 21) REPORT #: 25-0006 SYNOPSIS This report documents the investigation into the origin and cause of a structure fire. ADDITIONAL RESOURCES 1. SLO COUNTY/ CAL FIRE Engine 21 SOURCE OF ACTIVITY On 06/21/25, at approximately 0002, San Luis Obispo City Dispatch received a 911 emergency call reporting a structure fire at 883 Bougainvillea St., San Luis Obispo, CA. Battalion Chief John MACDONALD established Bougainvillea IC and assigned Engine 3 to fire attack with the assistance of SLO Cal Fire Engine 21. Per E3 crews, moderate smoke was observed throughout the structure with multiple fire detectors sounding. E3 and E21 observed that the laundry area was on fire. Crews promptly knocked down the fire and transitioned to salvage and overhaul. Truck 1, Engine 2, and Engine 4 were assigned additional duties throughout the incident, including ventilation, securing utilities, and overhaul. The drywall adjacent to and above the washer and dryer appliances was removed to check for extension of fire into the attic. INVESTIGATION My actions and findings result from the application of the scientific method, the recommended systematic approach to fire investigations, as outlined in NFPA 921, Guide for Fire and Explosion Investigations 2024 ed (NFPA 921). Methodology The methodology I utilized during this investigation consisted of identifying all available data for origin determination, including witness accounts, an initial scene assessment, development of a preliminary fire spread hypothesis, an in-depth examination of the fire scene, development of a final fire spread hypothesis, and identification of the fire’s origin. I identified all potential ignition sources, fuel packages, oxidizers, and circumstances. This information was utilized to develop fire-cause hypotheses and determine which hypothesis best fit the credible data available to identify the cause of this fire. Summary of Statements Address: 883 Bougainvillea St., San Luis Obispo, CA. 93401 Phone: I spoke to at approximately 0200 hours. was the sole person in the residence at the time of the fire. He reported he had been doing laundry for approximately 2 hours, beginning at 2200 on 6/20/25. began drying his final load of laundry in the dryer. After approximately 15 minutes, he heard a smoke detector sounding. STATEMENT… He investigated the laundry area and opened the dryer door. He took out a blanket that had been drying and observed light smoke inside the dryer. The smoke increased, and stated it may have been coming from inside or underneath the dryer. He called 911. While on the phone, he then observed flames inside the barrel of the dryer. reported that he grabbed his two dogs and left the residence. additionally stated that he cleans the lint trap of the dryer every load and had recently vacuumed the lint trap. He had not had the dryer vent ducting cleaned since his time as a renter of the property beginning in June 2023, and did not know if/when the homeowner had had the dryer vent system cleaned professionally. did not report any idiosyncrasies with the electrical outlets at the washer and dryer appliances. He did not recall the exact make and model of the dryer. He noted it was an older model. END OF STATEMENT Scene Examination This fire scene consists of a single-story residential building of wood frame, Type V, construction with an asphalt shingle roof. The home has multiple smoke detectors. The home is not sprinklered. Systematic Approach I began my investigation by systematically and methodically walking through the fire scene, from the exterior to the interior, identifying all available data to determine where and how the fire had started. I walked through the exterior in a clockwise fashion, noting the following: EXTERIOR “A” Side The “A” side faces north and includes the side of the garage adjacent to the street and front door to the residence. Some smoke damage was observed at the top of the front door frame and gutter (IMG_9313). No damage was observed to the exterior of the garage. “B” Side The “B” side faces east and contains the gas and electrical utilities at the A/B corner. The gas connection was observed in the on position. The electrical panel was opened, the main service disconnect had been switched off by fire crews. The 120v connection labeled “WASHER” was observed to be tripped (IMG_9306). What appears to be the dryer vent exhaust is also located on side B, approximately 2 feet from the roof of the home. Smoke damage and soot was observed underneath and to the sides of the dryer exhaust vent cover (IMG_9309, 9310). “C” Side Page 12 of 14 The “C” side faces south. Smoke patterns were observed on the upper corners of windows on this side (IMG_9311). “D” Side The “D” side faces west. Smoke patterns were observed on the upper door frame of the sliding glass door exiting the dining area of the house (IMG_9312). No damage observed on the exterior side D of the garage. INTERIOR I entered the structure through the side A entrance door. Alarm/Smoke Detector/Protection/Security I observed smoke detectors throughout the living spaces of the home including: in the hallway above the washer and dryer appliances (destructed in fire), interior of the main/master bedroom near the door (major damage), in bedroom #2 (smoke damage, in alarm during investigation). Per E3 crews, another smoke detector, which was in alarm, was removed from the “office”/ bedroom #3 during overhaul activities. Garage The garage was not included as part of the investigation. Per the resident, the garage is kept secured as personal storage for the homeowner. During the investigation I did not find evidence that warranted an inspection of the garage. Living Room The living room appeared to have an average fuel load of common combustible materials for an inhabited structure. I observed a relatively even gradient of soot deposition—greatest at the ceiling and upper walls, and lessening towards the floor (IMG_9364). Deformation of the upper half of the window blind slats on the interior of Side A of the living room indicates the extension of the hot gas layer in that portion of the room (IMG_9365). Kitchen Similar to the living room, soot deposition was observed on the kitchen ceiling, cabinets, and walls in a relatively even gradient. Deformation of the window blind slats was also observed. Appliances including the stove, a toaster oven, and microwave oven in the kitchen and dining room area observed to have little to no damage (IMG_9360, 9361, 9362). Hall Increased soot deposition was observed in the hallway leading from the living room to the bedrooms. A clear line of demarcation is evident on the door frame to the “office”/Bedroom #3; heavier soot is observed approximately 2 feet down from the top of the door frame. A light fixture or other item located near the top of the door frame was observed with significant deformation and mass loss, while a light switch approximately halfway down the door frame was observed intact (IMG_9331). “Office”/Bedroom #3 Minimal soot deposition was observed in this room compared to other rooms. The door was likely closed to this room during the fire. I observed some condensation drip patterns on the window and walls. A light fixture at ceiling of room was observed intact (IMG_9359). Bedroom #2 I observed soot deposition in this room similar to that of the kitchen and living rooms. Deformation of the blinds and a hanging plant near the ceiling of the room demonstrate extension of the hot gas layer into this room. A line of demarcation of soot was apparent in the door frame similar to the “office”/bedroom #3(IMG_9358). Main Bedroom #1 Greater soot deposition was observed on the ceiling of this room than other spaces in the house. A line of demarcation was observed on the door, similar to the other bedrooms. Thermal damage, including the peeling of paint, was observed on the ceiling and upper 2 feet of an interior wall leading to the master bathroom. Charring was observed on the upper portion of the exterior door frame (IMG_9332, 9354). I observed a smoke detector on the ceiling of this room had melted. The Main bedroom is adjacent to the laundry closet in the hallway. Area of Origin (AOO) After careful consideration that all credible data has been accounted for and all credible alternate origin hypotheses have been considered and eliminated, it is my opinion that the area of origin was washer and dryer closet. The majority of the drywall in the closet and hallway ceiling adjacent to the closet had been removed during fire fighting activities to check for extension of fire into the attic. No extension of fire to the attic was observed by crews. Calcination of the drywall on the hallway wall opposing the washer/dryer closet was observed with a line of demarcation approximately 3-4 feet below the ceiling of the hallway (IMG_9332). This indicates a higher degree of heat exposure in this area. The Main Bedroom #1 door frame, which is adjacent to the washer/dryer closet, had charring approximately 2-3 feet down from the top with charring extending further down on the side of the washer/dryer appliances (IMG_9332). Charring and soot deposition was observed on the upper 2 feet of laundry closet the frame on the left side of the closet (IMG_9333). Thermal damage was observed extending from the floor to the top of the frame on the right side of the laundry closet (IMG_9335, 9336,). Drywall left intact in the lower left portion and at the lower back wall of the washer/dryer closet appears to have only minimal soot deposition (IMG_9333). The drywall on the right side of the closet had been removed during firefighting activities. A 240v outlet observed in the closet observed with minimal to no soot deposition or deformation and did not appear to be in use during the time of the incident (IMG_9333, 9338). A 120v outlet in the closet area was observed with light soot deposition and some physical damage (IMG_9339). Fire effects such as charring or thermal damage were not observed on the adjacent stud or unexposed drywall indicating this electrical outlet was not the point of origin. The lint duct was observed at the lower left corner of the closet. Charred lint was observed inside the vent duct (IMG_9340, 9341). Per E3 crews, the dryer was located to the right of the washer in the closet. The studs supporting the wall adjacent to the dryer were observed without charring or major damage (IMG_9342). Damage to a ceiling fan and insulation was observed above the washer/dryer area (IMG_9343,9344,9345). The hallway wall opposing the dryer shows thermal damage and a fire pattern indicative of fire spreading from the barrel of the dryer to the wall (IMG_9346). A relatively round spot of discoloration can be observed in the lower portion of the wall, beginning at approximately the upper part of the baseboard and extending approximately 2 feet. Some deformation is also apparent in the nearby electrical outlet plate cover. The surrounding drywall is intact while the upper portion of this hallway has a distinct line of demarcation and calcination of the drywall (IMG_9332, 9347). This is presumed to have been due to the dryer door glass bursting and heat and flame from the dryer affecting the opposing wall and is not indicative of a point of origin. The majority of the damage observed is believed to have been from fire spread out of the laundry closet and across the hallway. The washer and dryer appliances had been moved to the front yard by engine crews. I observed significant heat-induced color change to the dryer and to a lesser extent to the washer. The dryer was observed without the window. Much insulation was sitting on top of the dryer. The exhaust vent ducting was observed on top of the dryer with much lint inside the duct (IMG_9316). No information about the make and model of the dryer was observed. The back of the dryer was observed with thermal damage on the left and upper middle of the machine. The gas line enters the machine on the lower right corner. Less color change was observed on this corner (IMG_9322). The 120v electrical cord is connected to the dryer at the upper left of the machine. Approximately 1.5ft of the cord at the top was observed to have mass loss of the plastic coating, in some areas down to the wiring (IMG_9322). The remainder of the cord and the plug was observed with minimal to no damage. Much damage was observed on the interior of the dryer including significant burn patterns on the interior door (IMG_9315). The upper right portion of the controls of the washer machine Page 13 of 14 were observed with a greater degree of deformation, as well as the pull handle located on the right side appeared to have mass loss. (IMG_9316). The electrical cords, water hose, and back of the washer machine appear to have no discoloration, deformation or other thermal damage (IMG_9321). AOO Competent Ignition Sources Competent ignition sources within the area of origin include electrical sources (120v, 240v) and the gas-powered dryer appliance. FIRE CAUSE 1.IGNITION SOURCE: dryer heating element 2.MATERIAL FIRST IGNITED: lint 3.OXIDANT: Oxygen from surrounding air 4.EVENT WHICH BROUGHT IGNITION SOURCE AND MATERIAL FIRST IGNITED TOGETHER: The accumulation of lint inside dryer exhaust system inhibits proper air flow. Operating the dryer continuously for approximately 2 hours can result in heat buildup to the extent that deposited lint ignited. SKETCH See attachments. PHOTOS 67 DIGITAL PHOTOGRAPHS WERE TAKEN AND UPLOADED TO THE ELECTRONIC CASE FOLDER EXPOSURES 1.ACTUAL EXPOSURES: Interior/exterior of residence. The interior of the garage was not observed during the investigation. 2.POTENTIAL EXPOSURES: NUMBER OF FATALITIES AND/OR INJURIES No fatalities or injuries were a result of this fire. WEATHER 1.https://www.wunderground.com/history/ DATE TIME TEMP. F HUMIDITY %WIND DIRECTION WIND SPEED CONDITIONS 6/20/25 2356 51 86 NW 3mph Fair CONCLUSION Based on the physical evidence found in the AOO, no other competent ignition source outside of the dryer appliance could have started the fire. The observed fire effects on the washer and dryer appliances, the remaining drywall in the laundry closet and adjacent wall of the hallway demonstrate spread of fire from the dryer to the surrounding area. The unique thermal pattern observed on the hallway wall opposite the dryer window show the intensity of the fire inside the dryer. Per witness statements, it appears the blanket being dried was not the first material ignited but later became fuel for the fire. CLASSIFICATION OF THE CAUSE ACCIDENTAL: The proven cause does not involve an intentional human act (2017 NFPA 921 20.1.1) My opinion of the origin and cause of this fire is based on the following: 1.My more than (2) years of professional fire investigations 2.I have personally conducted and/or assisted in over (20) fire events 3.I have over (230) hours of fire investigation and related law enforcement training Apparatus Narrative for BC2: Unknown Page 14 of 14