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Complaint Investigation Summary Report #: 5105 COMPLAINT ID: COGENUJ36 Site Location: IN FRONT OF 1049 S WILSON WAY Activity Summary Activity Date Recorded by 07/27/2021 7:30 AM Had previously discussed with Stacy Rivera, that instead of going to work MURO and arriving at our start time of 7:30 AM, I was to go straight to the spill site and arrive at 7:30 AM. Upon arrival, I observed the hazmat contractors were in full body PPE and air respirators. So I remained at opposite end of spill site. The downed transformers were still on the street/sidewalk area. Observed standing liquid along the gutter and soil about 20 — 30 feet south of the downed transformers. Jose Guzman (PSC field supervisor) walked up to me since there was potential PCB contamination and cleanup crew members were wearing full body PPE and air respirators. Jose Guzman provided the following information: They just got started approximately half-hour ago. The secondary spillage along the gutter was diesel, not oil from the transformers. Jose Guzman's direct phone number is: 559-363-3720. - Dave Larson (PG&E) will be arriving shortly to collect a sample of oil from each transformer to run analytical for PCB concentration. I took photos and then left spill site. Received Cal OES Control #: 21-3999 for the 15-gallon oil spill with unknown concentration of PCBs reported by Jamie Beckett (PG&E). Updated Elena Manzo who advised I go back to the spill site to inquire about the plan for cleanup. 9:31 AM Arrived at spill site to see what their plan for cleanup is. Spoke to Jose Guzman (PSC). They were working on the oil spill cleanup on the soil. Jose reported that they will not be cleaning up the diesel spill because that is not PG&E responsibility. They were contracted to clean up the oil spill, but not the diesel spill. Jose also stated that Dave has not yet arrived to take transformer samples. 10:00 AM Left site. Returned to EHD. 10:20 AM Called Dave Larson (PG&E) 209-401-9719 to ask status of oil samples. Dave stated he has not taken the samples as of yet. When he takes the sample, he will immediately drive them to the lab and request the tests to be run and analyzed same day. Dave stated he designated the oil spill area to be USA'd. Dave reported he removed solids from storm drain catch basin and used a wipe and actively reached inside the storm drain line via the manhole and found that some oil did get in, therefore a jetter is needed. They will use an inflatable ball plug and everything will be guaranteed to be contained. He has jetter truck, but he doesn't know which storm line. Dave believes the oil spilled is positive for PCBs. I told Dave I'll contact City of Stockton since they will not be onsite because they are not respirator trained. Called Richard Stifler to provide update on the spill status. Richard expressed concern that they cannot do any jetting of the lines without having received the PCB results. Richard stated he is the one that had alerted PSC hazmat contractors that they need to be in full body PPE and respirators because presence of PCBs is likely. When Richard arrived, PSC was onsite without the required PPE. There is also concern that a ball plug is needed. I let Richard know I would call Dave to advise of these concerns. Called Dave Larsen. Explained Richard's concerns. Dave requested Richard's number. Called Richard to ask which phone number I should give to Dave, since the number I have been calling Richard on is confidential. Richard said he will call Dave, so I gave him Dave's phone number. 10:36 AM Called Jamie Beckette (PG&E) about the diesel spill and that I was told it is not PG&E responsibility. I requested responsible party information for the 5105.rpt Page 3 of 12