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Complaint Investigation Summary Report #: 5105 COMPLAINT ID: CO9ACHSRY Site Location: 21915 SEXTON RD Activity Summary Activity Date 12/30/2020 Recorded by Generated notice to abate and sent copy to Celia Barajas, Environmental Field GAITAN Scientist, PGE. Arrived at 21915 Sexton Rd. Could not locate spill area, contacted Celia and asked for directions on where the spill area was located. She stated that she does not know, she said she would contact PSC foreman, Anthony and get back to me. Received a call from Celia she could not get a hold of Anthony, she provided an additional address to see if I can find spill area. I went to the following addresses: -2373 Sexton Rd. Escalon, CA 95320 -22339 E. River Rd. Escalon, CA 95320 I observed no spill area at both locations. Celia sent a message and suggested I contact property owner to locate spill. I contacted Glen Vann Ruler, property owner and left a voicemail. Received call from Celia, she stated that the spill is located on 21915 Sexton Rd. behind the property. She stated that she was on her way, I responded that I would wait for her. Went to 21915 Sexton Rd. knocked on door of house located on property, left my business card after no answer. Began writing narrative. Celia arrived and showed me spill area. Spill area is located approximately 800 feet behind the house. We took the dirt road on the side of the house which lead to the replaced pole mounted transformer. I observed an approximately 10 by 20 foot spill area, I noticed some heavy staining on some spots in the impact area. Most notably the border of the northern most impacted area appeared darker than the rest of the impact area. Discussed site with Celia, she stated that the darker spots were due to soil being exposed underneath, after digging and potential watering of the orchard. I stated that the clean up did not appear done. She contacted Anthony, foreman for PSC, and asked how much soil did they shovel out. He stated that they dug approximately 2 to 3 inches depending on the area and generated approximately five 55-gallon containers with soil impacted with transformer oil. I asked Anthony how he determined that area was cleaned; he stated they kept digging until there was no odor. I grabbed a pair of nitrile gloves and grabbed soil from the impact area from the northern most point into the orchard. I noted a shimmering residue left behind on the gloves. Celia stated that maybe it was from water, I informed her that water does not typically leave a shimmer on the gloves. I grabbed background soil sample outside of the impact area with a clean pair of nitrile gloves; I shoveled with my hand approximately 1 inch down. I held the soil in my hand and showed Celia that the soil that was not impacted by transformer oil did not leave a shimmer behind on the glove. I did this two more times from different soil areas. Celia performed her own test and placed soil from the impact area onto a piece of notebook paper. After a couple of minutes, she dumped the soil back into the impacted area and noted that an oily residue was left behind on the notebook paper. She agreed that additional cleaning was required. I contacted Michelle Henry 'Lead Senior RENS' and updated her on the complaint. Celia informed me that she will contact PSC and notify them that additional cleaning is required. Went back to EHD and labeled and deposited nitrile gloves contaminated with transformer oil into the hazardous waste storage closet. Received call from Glen Van Ruler, property owner, and discussed clean up, I notified him that I was on site with PGE and clean up is not complete. I stated additional clean up would have to be made. He stated he was okay with additional clean up being performed. 12/30/2020 Sent message to Celia Barajas, Env. Field Scientist, PGE. Requested photos that GAITAN PSC took when clean up was finished and ETA for PSC to perform additional clean up. She stated that she will send me the photos and PSC will be on site at 230pm. Notified her that I will be there. 51 05. rpt Page 2 of 4