FOR MEN ya FIRE PRO 1?0 CALIFORNIA DEPARTMENT OF FORESTRY AND FIRE PROTECTION Sonoma-Lake-Napa Unit 1199 Big Tree Lane Saint Helena, CA 94574 INVESTIGATION REPORT CASE NUMBER: 1? CALNU 010049 CASE NAME: Nuns DATE: October 08, 201? INCIDENT TYPE: Wildland INCIDENT Lead investigator:? Nuns 1 - None LE80 (Rev. 7/2011) 10/08/2017 17CALNU010049 Officer Initials - Nuns 10/08/2017 17CALNU010049 2 - SUMMARY: On October 08, 2017 at 11:11 pm, the CAL FIRE Saint Helena Emergency Command Center (ECC) dispatched a wildland fire at 2 Nuns Canyon Road in the community of Glen Ellen, located in Sonoma County, California. The ECC named the ?re Nuns. Firefighting resources from CAL FIRE and various other Fire Departments responded to the fire. The Nuns fire originated in a ?eld at the address of 1210 Nuns Canyon Road in the community of Glen Ellen on the night of October 08, 2017. Within the field a section of tree detached from the stem and contacted a powerline conductor. The powerline conductor fell to the ground, contacted a receptive fuel bed, and ignited the Nuns Fire. Around the time of dispatch forthe Nuns Fire, a remote automated weather station located 1.6 miles away recorded an average wind speed of 17 miles per hour and gusts at 45 miles per hour. The wind contributed to the advancement of the Nuns Fire. A red ?ag warning was issued by the National Weather Service for the Sonoma-Lake-Napa Unit starting at 11:00 AM on October 08, 2017. The Nuns Fire burned into adjoining fires and became part of the Central LNU Complex. The Nuns, Adobe, Norrbom, Pressley, Partrick and Oakmont/Pythian fires are all incorporated into the Central LNU Complex. The Central LNU Complex was contained on October 31, 2017. The Central LNU Complex consumed 56,556 acres and damaged and destroyed 1,527 structures (See Damage Inspection Summary Report). Based on my origin and cause investigation. I determined the Nuns Fire ignited as a result of a section of an alder tree detaching from the stem and contacting an energized powerline conductor causing the conductor to fall to the ground contacting a receptive fuel bed and ignited the Nuns Fire. LE80 (Rev. 7/2011) 3 Of?cer Initials- Nuns 10/08/2017 17CALNU010049 3 - SUBJECT: A powerline conductor located on the property of 1210 Nuns Canyon Road. Glen Ellen, CA. Global positioning system coordinates: 38 23.648, 122 30.977 LE80 (Rev. 7/2011) 4 Officer Initials - Nuns 10/08/2017 17CALNU010049 4 - In total the Nuns incident burned 56,556 acres within Napa and Sonoma Counties. The ?re damaged and/or destroyed 1527 structures in Napa and Sonoma County (See Damage Inspection Summary Report) and resulted in 2 fatalities. WITNESSES: Phone? Can testify to: Seeing fire coming from Nuns Canyon and Nelligan Road toward her property the night of October 08, 2017 W-2 Name: Addres Phone: SI Can testify to: Performing structure protection at 1210 Nuns Canyon Road on the night of October 08, 2017 W-3 Name: Phone:? Can testify to: Being at 1210 Nuns Canyon Road the night of October 08, 2017 W-4 Name:? Address:? Phone:? Can testify to: Arborist at Nuns Fire, evaluated tree and provided report LE80 (Rev. 7/2011) 5 Officer Initials - Nuns WLQ 10/08/2017 17CALNUO10049 Name: Address; Phone: Can testify to: Forestry Assistant II at Nuns Fire, evaluated trees and provided repon Name: Address: Phone: Can testify to: Providing scene security at the origin of Nuns Fire Name: Address Phone: Can testify to: Providing scene security at the origin of Nuns Fire Name: Address Phone: Can testify to: Providing scene security at the origin of Nuns Fire Name: Address Phone Can testify to: Providing scene security at the origin of Nuns Fire Name: Address Phone: Can testify to: Providing scene security at the origin of Nuns Fire LE80 (Rev. 7/2011) 6 Officer Initials - Nuns VV41 ?#12 VV43 W-14 VV45 10/08/2017 17CALNU010049 Name: Address Phone: Can testify to: Providing scene security at the origin of Nuns Fire Name Address: Phone Can testify to: Provided investigation assistance Name: Address Phone: Can testify to: Provided investigation assistance Name: Address: Phone: Can testify to: Provided investigation assistance Name: Address Phone Can testify to: Provided contact telephone number for- Can testify to: Assisted with evidence transportation LE8O (Rev. 7/2011) 7 Officer Initials . Nuns WLZO ?#21 ?#22 10/08/2017 17CALNU010049 Name: Address: Phone: Can testify to: Assisting with investigation of Nuns Fire Name Address Phone Can testify to: Assisting with investigation of Nuns Fire Can testify to: Origin and cause investigation Name: Address Phone: Can testify to: representative during evidence collection Name: Address: Phone: Can testify to; Fire Investigator hired by Pacific Gas and Electric Name Address: Phone: Can testify to: Reviewing collected evidence LE8O (Rev. 7/2011) 8 Officer Initials - Nuns 10/08/2017 17CALNUO10049 OTHERS: 04 Name: Address Can testify to: Clearing Nuns Canyon Road of downed trees Name: Address Phone: Can testify to: Providing aerial bucket truck for Nuns Fire LE80 (Rev. 7/2011) 9 Officer Initials - CONOCJIAODNA Nuns 10/08/2017 17CALNU010049 5 - EVIDENCE: E-1 Section of tree limb E-2 Section of tree limb E-3 Section of tree limb Evidence items E-1-E-3 were sections of the detached tree that came in contact with the powerline conductor. In the narrative referred to as detached section of tree/tree top. E-4 Short section of wire Evidence item E4 was section of powerline conductor connected to the wooden cross member of the power pole located in the ?eld at 1210 Nuns Canyon Road. E-5 Wood pin Detached from wooden cross member on power pole located in ?eld at 1210 Nuns Canyon Road. E-6 Center phase wire Collected as part of the powerline conductor span located at 1210 Nuns Canyon Road E-7 East span powerline conductor Collected as part of the powerline conductor span located at 121 Nuns Canyon Road E-8 West span powerline conductor Collected as the powerline conductor span that was in contact with the ground at 1210 Nuns Canyon Road. E-9 West span wood pin and conductor Collected as part of the power line equipment LE80 (Rev. 7/2011) 10 Officer Initials. Nuns 10/08/2017 17CALNU010049 6 - Fuel: Grass oak woodlands in lower elevations and valley. brush mid slope, timber/hardwood mix at higher elevations. Weather: The National Weather Service put out a red ?ag warning for the North-East Bay and Santa Cruz Mountains starting at 11:00 AM Sunday October 08, 2017 through October 15, 2017 (See attachment 4). Weather station ID: KENWW Weather station distance from Nuns SOA: 1.6 miles, Northwest Time: 11:00 PM Temperature: 72 degrees Fahrenheit Relative humidity: 12% Wind speed: 17.1 Wind gust: 45.7 Wind direction: North Weather station ID: E2362 Weather station distance from Nuns SOA: 9 miles, Northwest Time: 11:39 PM Temperature: 73 degrees Fahrenheit Relative humidity: 13% Wind speed: 12 Wind gust: 36 Wind direction: North LE80 (Rev. 7/2011) 11 Of?cer Initials. Nuns 10/08/2017 1YCALNU010049 Weather station ID: Hawkeye RAWS Weather station distance from Nuns SOA: 30 miles, North Time: 11:56 PM Temperature: 64 degrees Fahrenheit Relative humidity: 12 Wind speed: 48 Wind gust: 79.01 Wind direction: North/Northeast Topography: The Nuns Fire burned in various terrain from the valley floor to the mountains. LE80 (Rev. 7/2011) 12 Officer Initials - Nuns 7 - EQUIPMENT: 10/08/2017 17CALNU010049 A powerline conductor located at 1210 Nuns Canyon Road, Glen Ellen, CA LE80 (Rev. 7/2011) 13 Officer Initials - Nuns 10/08/2017 17CALNU010049 8 - PROPERTY: The origin of the Nuns Fire was located in a flat ?eld on the following property: APN: 052-040-008 Address: 1210 Nuns Canyon Road. Glen Ellen, CA In total, the Central LNU Complex burned 56,556 acres within Napa and Sonoma Counties. The fire damaged and/or destroyed 1527 structures in Napa and Sonoma County (See Damage Inspection Summary Report) and resulted in 2 fatalities. LE80 (Rev. 7/2011) 14 Officer Initials - oowcnowhwmA Nuns 10/08/2017 17CALNU010049 9 - NARRATIVE: (All times and measurements are approximate) On October 08. 2017 at 11:11 pm. the CAL FIRE Saint Helena Emergency Command Center (ECC) dispatched a wildland fire at 2 Nuns Canyon Road in the community of Glen Ellen. The ECC named the fire Nuns. Firefighting resources from California Department of Forestry and Fire Protection (CAL FIRE) and various other Fire Departments responded to the ?re. On October 09, 2017, was employed by the California Department of Forestry and Fire Protection (CAL FIRE) as a peace of?cer. On October 09, 2017, I responded to the Nuns Fire to conduct an origin and cause investigation of the fire. I drove to the fire?s dispatched location on Nuns Canyon Road. Nuns Canyon Road is a rural county road that runs north to south with wooden power poles and powerline conductors running parallel to the road located on the west side. For my safety and to avoid any potential contact with downed powerline conductors, I visually examined the powerline conductors confirming all were intact as I drove down the road. I parked near the driveway to 1210 Nuns Canyon Road. The address of 1210 Nuns Canyon Road was located one half mile off Sonoma Highway toward the north east. The road past 1210 was blocked with downed tree limbs and debris. Powerline conductor is used in this report based on the following de?nitions. Collins English Dictionary de?nes power line as a cable, especially above ground, along which electricity is passed to an area or building. State of California rules for Overhaed Electric Line Construction General Order No. 95 defines conductor as a material suitable for: (1) carrying electric current, usually in the form of a wire, cable or bus bar, or (2) transmitting light in the case of fiber optics. The Guide to Wildland Fire Origin and Cause Determination published by the National Wildfire Coordinating Group de?nes the category of powerlines to include all electrical equipment associated with the production, transmission, and use of electricity. LE80 (Rev. 7/2011) 15 Officer Initials- Nuns 10/08/2017 17CALNU010049 I walked north on Nuns Canyon Road. I observed thick smoke and active ?re burning. I observed two powerline conductors laying on the road between pole #6459, 019636 and pole 15630. I continued to walk cautiously past the downed span to the ?re?s edge. For my safety and to avoid any potential contact with downed powerline conductors, I continued to look up at the powerline conductors to confirm all were intact. I walked to the fire's edge (N 38 23.892, 122 30.805) and observed a backing fire on both sides of Nuns Canyon Road. I did not observe any additional powerline conductors down. I returned to the section of downed powerline conductors between pole #6459, 019636 and pole 15630. I observed what appeared to be an oak limb suspended on a utility line over the span ofdowned powerline conductors visually examined the limb and the base of the tree where the limb detached. The exposed wood located at the top of the base of the tree appeared to be fresh wood and displayed minimal signs of ?re damage. The bark around the tree base had signs of ?re damage I returned to 1210 Nuns Canyon Road. lwalked the span of powerline conductors located to the south of 1210 Nuns Canyon. I visually examined pole #120120432. The wooden power pole appeared to have three wooden cross arms with two transformers and powerline conductors that went to the east and west. I walked out the powerline conductors to the west. The powerline conductors appeared to run to a weather head located in a large gravel turn out. The weather head and all powerline equipment appeared to be in good working order. I visually followed the powerline conductors to the east from pole# 120120432 to a wooden power pole located in a field at 1210 Nuns Canyon Road, east of Calabazas Creek. I walked on to the property at 1210 Nuns Canyon attempting to locate the wooden power pole located on the east side of Calabazas Creek. The wooden power pole was located next to what appeared to be a pump house. The pump house contained what appeared to be a pressure tank and water storage container. There were no identifying marks on the wooden power pole. The wooden power pole was surrounded by vegetation in close proximity to powerline conductors. Three powerline conductors run LE8O (Rev. 7/2011) 16 Officer Initial CDme-waNuns 10/08/2017 17CALNU010049 south from the pump house power pole, connecting to another power pole in the field and eventually attaching to a residence. I identified the three powerline conductors as the west span, center span, and east span based on their cardinal point location on the power pole. The west span was closest to Calabazas Creek, on the west side of the power pole. The east span was on the field side of the power pole. The center span was located between the east and west span. I observed the west span powerline conductor that was connected to the pump house power pole resting on the ground. I observed a section of tree had detached from the stem and was resting on top of the west span powerline conductor. It appeared when the section of tree detached from the stem, it fell towards the east and came in contact with the west span powerline conductor, causing the powerline conductor to separate and fall to the ground. A short section of the west span powerline conductor remained attached to the cross arm of the power pool next to the pump house. The center and east powerline conductors remained suspended. The center span powerline conductor appeared to have a bow in it At 4:30 pm, CAL FIRE Investigator-Nived to assist with the origin and cause investigation. I briefed ?on the fire and investigation. We ?agged off an area with yellow and black flagging to the north and south of 1210 Nuns Canyon Road, designating an area not to be entered. At 5:25 pm, I contacted the ECC to request a security guard to maintain overnight scene security at the Nuns Fire. Scene security was provided and maintained through the duration of Nuns Fire investigation. Each security officer parked their vehicle on Nuns Canyon Road, south of the address of 1210, outside of the flagged off area. Clear and concise direction were given that nobody is to enter the ?agged off area and to complete an 214, logging any activity throughout the day and night. Each morning I arrived at 1210 Nuns Canyon Road, I collected a filled-out ICS 214 from the previous night security guard See LE80 (Rev. 7/2011) 17 Officer Initials Nuns 10/08/2017 17CALNU010049 attachment 11). At 9:35pm. I left the Nuns Fire. On October 10, 2017, at 7:35 am, I returned to the Nuns Fire-rrived a short time later. conducted a follow up interview at the -with In summary-stated on October 08, 2017 around 10:35 pm. she smelled smoke and called 911 to report she smelled smoke. While on the At 8:15 am. phone with 911 she saw fire coming from Nuns Canyon Road and Nelligan Road toward LE 78a witness statement was left with -to fill out at a later time. -and I walked out Nuns Canyon Road to the north of 1210 Nuns Canyon Road. We observed macro fire direction indicators of foliage freeze and protection. For our safety and to avoid any potential contact with downed powerline conductors we looked at all the powerline conductor spans as we walked out Nuns Canyon Road. All powerline conductors. power poles. hardware, and power pole fuses were intact. The only span that was not suspended was the span identified the previous day between pole #6459, 019636 and pole 15630. We walked back to 1210 Nuns Canyon and observed a power pole on the west side of Nuns Canyon Road that had powerline conductors that ran to west of the power pole. At 10:58 am, -and I attempted to locate the powerline conductors that ran to the west. We drove onto the -attempting to follow the powerline conductor span. From our vantage point we could see all powerline conductors were intact. We hiked the remaining section of powerline conductors that could not be seen and confirmed all powerline conductors were suspended and intact. We returned to 1210 Nuns Canyon Road. LE80 (Rev. 7/2011) 18 Officer Initials - Nuns 10/08/2017 17CALNUO10049 At 11:31 am, _received a LE 78a witness statement from _(See attachment 10). _and I examined the wooden power pole located next to the pump house at 1210 Nuns Canyon Road. We focused on trying to locate the detachment point of the west span powerline conductor. With binoculars, we looked at the short section of powerline conductor that was attached to the wooden cross arm of the power pole. The tips of the attached section of powerline conductor appeared to be discolored where the powerline conductor detached. At 1: 15 I met with _identified himself as an owner of 1210 Nuns Canyon Road. _said a tenant named-was renting the house at 1210 Nuns Canyon Road. _did not have contact information for I gave my contact information and asked him to contact contact information. At 1:48 I returned to the downed section of tree and powerline conductor near the pump house. We visually examined the section of tree looking for me with information. I obtained rub/score marks indicating any contact with the powerline conductors. At 2:30 pm, Glen Ellen Fire Department fire engine 3385 arrived at 1210 Nuns Canyon Road?introduced himself to me. In summary-told me the following. The night the Nuns fire started he responded to 1210 Nuns Canyon Road and performed structure protection on the residence. He saw fire on both sides of the road. The wind was erratic and blowing in all directions. The shop located on the property was starting to catch fire and the ?re was starting to skunk around the back side of the residence. He tried to fill the engine with water from a garden hose on the property and was not able to get any water out of the hose. CAL FIRE Investigator origin and cause investigation. LE80 (Rev. 7/2011) arrived to assist with the as briefed on the investigation Officer Initials CDVOCTIACDNA Nuns 10/08/2017 17CALNU010049 - _and I walked out Nuns Canyon Road. We examined the oak limb suspended on a utility line north of 1210 Nuns Canyon Road I had identified on October 09, 2017. The wood at the base of the tree where the oak limb had detached and the wood at the base of the limb showed minimal fire damage Looking at the wood at the top of the base of the tree, from outside to inside, I observed wood colors of tan, red/pink, light brown, and black/dark brown in the center. The bark around the tree base had signs of fire damage. Minimal fire damage to the exposed top wood indicated the tree fell after the ?re had passed through. As a group. we concluded the oak limb detached from the base of the tree after the fire passed through that location. The oak limb contacted the suspended powerline conductors, causing the powerline conductors to detach from the power pole and rest on the road. As a group, we continued our walk out Nuns Canyon Road looking at macro fire pattern indicators. Advancing fire pattern indicators of foliage freeze and protection were observed. For our safety and to avoid any potential contact with downed powerline conductors, we continued to look up at the powerline conductors to confirm all were intact. We continued to look at fire pattern indicators as we walked. A transition of ?re pattern indicators was observed further north on Nuns Canyon Road. The ?re went from advancing to backing on the north/east side of the road indicating a transition zone. The ground fuels showed less consumption and a lower fire intensity. On the west side of the road the ?re pattern indicators made a downhill run. We returned to 1210 Nuns Canyon Road (See attachment 3). - _and I returned to the wooden power pole next to the pump house. The power pole was re?examined using binoculars. The short section of attached powerline conductor appeared to be discolored at the tips. Further up the wire near the wooden cross arm the powerline conductor appeared to have separation between the wire strands Fire pattern indicator flags were placed in the ?eld near the pump house Red flags were placed to mark advancing fire pattern indicators, yellow fla LE80 (Rev. 7/2011) 20 Of?cer Initials i Nuns 10/08/2017 17CALNU010049 were placed to mark lateral fire pattern indicators and blue flags were placed to mark backing fire pattern indicators. Digital photographs of the ?ags were taken on October 1 1, 2017. Fire pattern indicators of protection and staining were observed. A general origin area (GOA) was determined based on ?re direction indicators. Within the GOA laid the downed powerline conductor and downed section of tree. At 8:24pm. I left the Nuns Fire. On October 11, 2017 at 7:57 am, I arrived at 1210 Nuns Canyon Road. At 8:00 am. -arrived. At 8:10 am, additional fire pattern indicator ?ags were placed at near the pump house, east side of the creek and on the west side of Nuns Canyon road. At 9:30 I focused on fire pattern indicators on the west side of Nuns Canyon Road west of 1210 Nuns Canyon Road. Advancing ?re pattern indicators of foliage freeze and spalling were observed indicating the fire advanced uphill, west of Nuns Canyon Road The ?re was slope driven and made various uphill runs. We followed the fire pattern indicators uphill until we reached the top of the hill. Backing fire pattern indicators were observed at the top of the hill. The fire burned lower intensity and even staining around rocks was observed The fire traveled to the north at the top of the hill and transition to down slope. We continued to follow the fire pattern indicators. We followed the down slope run to Nuns Canyon Road The location on Nuns Canyon Road where the downhill fire pattern indicators met the road, was the same area previously identi?ed as transition zone Based on the fire pattern indicators observed, the fire made advancing and backing runs and eventually advanced towards the south (See attachment 3 At 10:30 am, CAL FIRE Forestry Assistant II LE80 (Rev. 7/2011) 21 icer ni ta 5 Nuns 10/08/2017 17CALNU010049 _arrived at 1210 Nuns Canyon Road. He evaluated the detached section of tree and tree stem located near the pump house at 1210 Nuns Canyon. He also evaluated the suspended oak tree limb and tree base located on Nuns Canyon Road. In summary?oncluded the tree stem and tree top (detached section of tree) located near the pump house was an Alder. The tree did not have evidence of rot or loss of structural integrity. No infections, insects or pathogens were observed affecting the tree (see attachment 5). At 11:39 his evaluation. At 12:13 pm, I took digital photographs using my state issued digital camera of the fire pattern indicator flag field. I took digital photographs of the wooden power pole and power pole hardware. My camera is set on the continuous numbering setting for digital image labeling. The ?rst picture image I took at the Nuns Fire was At 3:42 pm, observations and measurements of the tree top and stem located near the pump house at 1210 Nuns Canyon Road was taken. The tree top had numerous tree branches extending off with green colored leaves. The tip of the tree top was detached The tip of the tree appeared to have a rub/score mark on it The length of the tree top was twenty-nine feet, six inches. The distance from the stem of the tree to the base of the tree top was three feet, eleven inches. The distance from tree stem to the GOA was thirty feet. The stem of the tree was located near Calabazas Creek. The creek had water in it. The upper section of stem of the tree appeared to have minimal fire damage The base of the tree stem appeared to have fire damage on the northeast side. LE8O (Rev. 7/2011) 22 Officer Initials - Nuns 10/08/2017 17CALNU010049 I walked a large circle around the downed tree top with powerline conductor beneath it two times, once clockwise and once counter clockwise looking at all aspects of the tree. The tree top had advancing fire pattern indicator ?ags to the south and east, lateral ?re pattern indicator flags to the northeast and backing fire pattern indicator flags to the west. The tree top and powerline conductor was located inside of the GOA. The foliage of the tree top appeared to curl in toward the limb 1497-1499) and detached twigs on the ground showed signs of backing. The ?re pattern indicators support the ?re started underneath the tree top. The tree top displayed ?re damage on the underside of the limb, indicating the tree top came down before the ?re passing through. Fire damage to the tree top displayed low intensity of fire, not a lot of consumption of fuel and minimal depth of char Standing near the GOA, I looked up at the center and east powerline conductor span. I observed the center powerline conductor span had an indentation/bow in the line The east powerline conductor span did not appear to have the same indentation/bow in the span. At 4:16 PM, two reference points were located at 1210 Nuns Canyon Road at. A metal stake was placed in the ground at reference point one (RP1) and global positioning systems (GPS) coordinates (WGS 84) were taken (N 38 23.645 122 30.967). The concrete casing around what appeared to be the pump well was identified as reference point two (RP2) and GPS coordinates were taken (N 38 23.643 122 30.982). Measurements from RP1 and RP 2 to the center of the GOA were taken. RP1 to GOA measured 30 feet. RP2 to GOA measured 43 feet 2 inches. At 4:26 PM, the perimeter of the GOA was measured (See attachment 3). Measurements of fire direction indicators from the GOA to indicators was taken (See attachment 3). At 5:12 pm. I left the Nuns Fire. LE80 (Rev. 7/2011) 23 Officer Initials - Nuns 10/08/2017 17CALNUO10049 On October 12, 2017 at 7:42 am, I arrived at 1210 Nuns Canyon Road. At 8:00 am, _arrived. At 8:38 am, I took digital photographs of the suspended tree limb resting on utility line and base of tree 560). At 9:09 am, I listened to a voicemail on my state issued cellular telephone from _In summary- told me the following. He had spoken to _who was home the night the Nuns Fire started. _told _when he left the residence the night of the fire he could not turn left out of the driveway at 1210 Nuns Canyon Road due to active burning fire near the road and drove right out of the driveway to avoid the fire. At 10:56 am. called-using my state issued cellular telephone- gave me a contact telephone number for- I called -and left a message asking him to return my call. At 11:41 am, I received a phone call on my state issued cellular telephone from- I received permission to digitally record our conversation (See attachment me the following in summary. The night the Nuns Fire started he heard a branch break and the electricity went out. He looked out the window of his residence and did not see anything. He was awakened by family members who told him there was a fire. They tried to evacuate toward the highway and could not due to fire. They drove north on Nuns Canyon Road and waited at Calabasas Preserve for the fire to pass-saw flames in the meadow toward the highway. At 11:45 am, Arborist _arrived at 1210 Nuns Canyon. _evaluated the detached tree top and stem located near the pump house at 1210 Nuns Canyon Road (See attachment 6). In summary _concluded the tree was an alder and a complete branch failure occurred. Prior to the failure, the health and LE80 (Rev. 7/2011) 24 Officer Initials Nuns 10/08/2017 17CALNU010049 condition of the subject tree is judged to be within normal limits for the species- provided a written report. At 1:30 p.m..-completed his evaluation. At 2:45 pm, GPS coordinates (W68 84) of the fire ?ag indicators were recorded and documented. (See attachment 3). At 5:25 pm, I left 1210 Nuns Canyon Road. On October 13, 2017 at 7:45 am, I arrived at 1210 Nuns Canyon Road. At 8:00 am. -arrived. At 10:00 am. I walked up and down Nuns Canyon Road and into the burn. re-examining my fire pattern indicators. I confirmed the fire direction of travel based on the indicators I observed. The fire pattern indicators all supported the fire originated from the identified GOA near the pump house at 1210 Nuns Canyon Road. At 1:25 pm, Sonoma County Public Works Supervisor-rrived at 1210 Nuns Canyon Road. He asked permission to clear Nuns Canyon Road north of1210 of downed trees and debris. Permission was granted-was given an ICS 214 to complete and clear and concise instructions to document his purpose and people performing road clearing activities. At 2:25 pm, additional Sonoma County Public Works employees arrived at 1210 Nuns Canyon Road. All employees were logged on ICS 214. -supervised the Public Works crew during their road clearing activities. At 5:04 p.m.,Fand his Public Works crew completed their road clean up. I rec iv LE80 (Rev. 7/2 11 25 Officer Initials Nuns 10/08/2017 17CALNU010049 a filled-out ICS 214 from-(See attachment 11). At 5:45 pm. -and I left 1210 Nuns Canyon Road. On October 14, 2017 at 7:45 am, I arrived at 1210 Nuns Canyon Road. At 9:41 am, I met with the assigned Light Detection and Ranging . I briefed them on the fire and gave them an ICS 214 to document their activity for the day. At 6:20 pm, the LIDAR team completed their work. I collected a completed ICS 214 (See attachment 11). At 6:46 pm, I left 1210 Nuns Canyon Road. On October 15, 2017 at 7:51 am, I arrived at 1210 Nuns Canyon Road. I took GPS coordinates and digital photographs of the fire?s progression (See attachment 3 At 10:30 am, Sonoma Valley Fire Battalion Chief? arrived at 1210 Nuns Canyon Road. He wanted to evaluate access for fire engines on Nuns Canyon Road. Access was granted. An ICS 214 was given to _to complete. At 11:03 am, an aerial bucket truck from-rived at 1210 Nuns Canyon. The bucket truck was utilized to take aerial photographs of the GOA. briefed the crew of the bucket truck on the fire and gave them an ICS 214 to complete. At 11:25 off a completed 214 and left 1210 Nuns Canyon Road (See attachment 11). The aerial bucket truck was carefully parked outside of GOA, 35 feet to the south. LE80 (Rev. 7/2011) 26 Officer Initials - Nuns 10/08/2017 17CALNU010049 At 11:50 am, I took aerial photographs of the GOA from the bucket of the truck At 12:40 I completed my aerial photographs. I received a completed ICS 214 from the aerial bucket truck crew and they left (See attachment 11). At 2:03 I contacted the Sonoma-Lake-Napa Unit warehouse to arrange transportation of the downed tree top within the GOA. A stake side truck was needed to transport the downed limb to evidence storage. I measured the length of the tree top with a measuring tape. The length of the tree top exceeded the length of my state issued pickup truck camper shell. At 2:53 Hayward Engine 308 (E308) arrived at 1210 Nuns Canyon Road. They were assigned by the division of the fire to mop up a smoke located at 1200 Nuns Canyon Road. The engine was given an ICS 214 to complete and permission to complete their task. At 4:03 E308 returned to 1210 Nuns Canyon Road. I received a completed 108 214 prior to their exit (See attachment 11). At 4:43 CAL FIRE Fire?ghter _rrived at 1210 Nuns Canyon Road in CAL FIRE LNU utility 1404 (U1404) to assist with transportation of the tree top. -assisted with the removal of the downed tree top. I instructed -to cautiously work around the perimeter of the tree top-used a chainsaw to cut the downed tree top into smaller, more manageable sections. He worked around the perimeter of the tree top carefully trying to avoid disturbing the GOA. was present during the cutting and removal of the tree top. The collected sections of tree top were tagged as evidence E-1 and E-2 and loaded up in U1404. LE80 (Rev. 7/2011) 27 Officer Initials - Nuns 10/08/2017 17CALNU010049 At 5:19 evidence item E-1 and E-2 were transported to CAL FIRE Middletown evidence storage. I followed U1404 to the evidence storage in my state issued pickup truck. I never lost visual sight of U104 during the transportation of evidence. At 6:48 I arrived at Middletown evidence storage. I entered evidence item E-1 and E-2 into evidence storage. I received a complete ICS 214 from _(See attachment 11). On October 16, 2017 at 8:14 am, I arrived at 1210 Nuns Canyon Road. At 8:35 am, I took GPS coordinates of the wooden power poles located in the field near the pump house at 1210 Nuns Canyon road. At 8:58 am, I took digital photographs using my state issued digital camera of the GOA with the tree top removed. The GOA was littered with small twigs and green, brown and charred tree foliage. At 9:02 am, I visually examined the GOA. I walked around the perimeter of the GOA two times, once clockwise and once counter clockwise looking for micro fire pattern indicators. I observed fire pattern indicators of staining and protection I worked from advancing ?re pattern indicators toward backing fire pattern indicators based on the micro fire pattern indicators I observed. The fire appeared to be lower intensity in GOA. I observed dried cured annual grass that was partially consumed by fire and a lack of white ash. The GOA was disturbed by the downed tree top, the tree top foliage contacting the ground within the GOA, and the removal of the tree top. Based on the ?re pattern indicators I observed, a speci?c origin area (SOA) four feet by four feet in size was located within the GOA. The downed powerline conductor laid in the center of the SOA. I visually examined the SOA. I used a debris removal tool and LE8O (Rev. 7/2011) 28 Officer Initials mummwaNuns 10/08/2017 17CALNU010049 a magnet over the SOA. I did not locate or collect any additional items identi?ed by the magnet or visually. At 2:57 representatives from Pacific Gas and Electric arrived. At 3:37 representatives from the California Public Utilities Commission arrived. At 4:45 additional representatives from arrived to assist with powerline conductor and power pole hardware removal. I identi?ed three powerline conductors and connecting power pole hardware as items I wanted to collect as evidence. As each item was removed, it was identified by colored tape indicating where it was located prior to removal. Red, white and blue tape was used to identify the span location and white tape with a black marking was used at each end of the powerline conductor to identify which end was on the top side. At 5:08 started removal of power pole hardware and powerline conductors. The west powerline conductor was wrapped with red tape. The center span was wrapped with white tape and the east span was wrapped with blue tape. The powerline conductor span was measured from power pole to power pole. The total span measured 113 feet 5inches in length and 23 feet off the ground in the center of the span. The center line was identified by as the neutral wire and the two outside lines were identified as 120 volt lines. Line spacing between the powerline conductors was measured at the top of the cross arm of each power pole by the linemen that removed the powerline conductors. The measurements at the south pole were given as 26 inches from outside to center powerline conductor and 62 inches from center to outside powerline conductor. The measurements at the north pole were given as 16.5 inches from outside to center powerline conductor and 62 inches from center to outside powerline conductor. LE80 (Rev. 7/2011) 29 Officer Initials - Nuns 10/08/2017 17CALNU010049 1 At 6:20 pm, I documented evidence items E-3-E-9. 2 3 At 6:54 pm, I placed and secured all evidence items in the camper shell of my state 4 issued pickup truck to transport to the CAL FIRE Santa Rosa evidence storage. 5 6 At 7:36 pm, I arrived at the CAL FIRE Santa Rosa evidence storage. 7 8 At 7:40 pm, I entered all collected evidence items into storage. 9 10 On October 18, 2017 at 6:54 pm, I arrived at 1210 Nuns Canyon Road. I met with CAL 11 FIRE Investigator nd private fire investigator hired by 12 showed -Nhere he 13 believed the Nuns Fire originated prior to my arrival. showed me - 14 -indings. -and I agreed to revisit findings the next 15 morning. 16 17 On October 19, 2017 at 8:34 am, I arrived at 1210 Nuns Canyon Road. I met with - 18 -We examined the identified SOAWnti?ed the previous day. 19 In the SOA laid a downed powerline conductor. concluded the downed 20 powerline conductor ignited the Nuns Fire. I did not agree with?indings 21 based on the following: When I arrived at the Nuns Fire I walked out Nuns Canyon Road 22 to the fire's edge. The fire?s edge was located to the south of where- 23 identified his SOA. I had walked to end of Nuns Canyon Road following out the span of 24 suspended powerline conductors. The downed powerline conductor 25 identified was suspended when I walked out the road on October 10, 2017. 26 I took GPS coordinates (WGS 84) using my state issued GPS device of? 27 SOA. The GPS coordinates were 38 23.900 by 122 30.740. I took GPS coordinates 28 at the location where I observed the fire?s edge on October 10, 2017. The coordinates 29 were 38 23.892 by 122 30.805. 30 31 On December 18, 2017 CAL FIRE Assistant Chief LE80 (Rev. 7/2011) 30 Officer Initials Nuns 10/08/2017 17CALNU010049 -mailed me a link containing California Public Utilities Commission published electric safety incident reported by In summary, the report states on October 16, 2017 identified a tree top that broke and fell on an open secondary service at 1210 Nuns Canyon Road. (See attachment 12). On March 8, 2018 at 1:55 pm, I met with electrical engineer? .f ?_and I reviewed photographic documentation of evidence items that had been collected at the Nuns Fire. In summary told me the following: The wire strand ends of the downed powerline conductor displayed penciling at the tips, an indication of tension break in the line and beads of melted metal indicating arc marking that would be present at a temperature of 1200 degrees Fahrenheit Evidence item E-3, section of tree limb, displayed arc tracking indicating that section of the tree came in contact with a heat source. On May 21,2018 at 9:00 am. I received a CAL FIRE LE 71 from -he LE 71 contains requests made b_to for data (See attachment 9). All the data is stored on a thumb drive located in the CAL FIRE Santa Rosa evidence storage. On May 25,2018, I received a CAL FIRE LE 71 from The LE 71 contains additional requests made by-to for data (See attachment 9). All the data is stored on a thumb drive located in the CAL FIRE Santa Rosa evidence storage. On May 25, 2018, I received data from that contained the Nuns Incident Description Factual Summary. Within the summary, states two smart meters located from 1210 Nuns Canyon Road both reported a Last Gasp event at 10:18 pm. on October 08, 2017. At 10:51 pm. on October 08, 2017 Line Recloser 47964 operated and reclosed. resulting in an approximately 10-second outage at 1210 Nuns Canyon Road. At approximately 12:01 am. on October 09, 2017 the Dunbar 1101 Circuit Breaker was remotely opened and de-energized (See attachment 12). LE80 (Rev. 7/2011) 31 Of?cer lnItIals - Nuns 10/08/2017 17CALNU010049 Opinions and conclusion: Based on my training, education, experience, and facts gathered during my origin and cause investigation, I determined the Nuns Fire was ignited due to a tree top contacting an energized powerline conductor causing the powerline conductor to come in contact with a receptive fuel bed. Transfer of digital photographs: I transferred 359 photographs that I had taken from my assigned digital camera to digital video disc on October 19, 2017 at 3:25 pm. I made a second digital video disc using the same process. I did not alter the photographs during this process. I labeled the digital video disc with "Digital Photographs Copy #1 and ?Digital Photographs Copy Transfer of digital voice recording: I transferred a digital voice recording of my interview with -to a digital video disc on October 19, 2017 at 5:05 pm. I made a second digital video disc using the same process. I did not alter the digital voice recording during this process. I labeled the digital video disc with "Digital voice recording copy #1 and digital voice recording copy reserve the right to reexamine this report if additional information is discovered or provided to me that could amend or reinforce my opinions or conclusions. END REPORT 3O 31 Fire Captain, CAL FIRE LE80 (Rev. 7/2011) 32 Officer Initials - Nuns 10/08/2017 10 - ATTACHMENTS: CAL FIRE FC 34 Dispatch Action Report Fire perimeter map Incident sketches Weather Forestry Assistant II site report Arborist site report Photographs Evidence log CAL FIRE LE 71 Supplemental report 10.CAL FIRE LE 78a Witness Statement 214's 12. Utility reports 9? 13. Digital video discs -Damage Inspection Summary Report -Digital Photographs -Digital Voice Recording LE80 (Rev. 7/2011) 33 17CALNU010049 Officer Initials -