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Complaint Investigation Summary Report #: 5105 COMPLAINT ID: COPFPNNPH Site Location: 725 W ANDERSON ST, STOCKTON CA 95206 Activity Summary Activity Date 06/21/2022 On site with John Alaniz, Ryan Rodriguez, Game Warden, from Fish and Wildlife Scott Moss, Operations Manager, and Fred Mitchell, Sales Manager, of Ponder Environmental Services and Richard Stiffler, Tech Services Supervisor, and Brian Uribe, Sr. Environmental Control Officer, from the City of Stockton. Recorded by GARCIA-MEJIA Per Richard Stiffler, an unknown source contaminated the storm drain conveyance system which consisted of storm drains to the East and West of the site and the drainage ditch at 725 W Anderson St, Stockton CA. The City of Stockton was notified by CalTRANS on 6/14/22 of oily liquid located in the ditch and they began clean up on 6/15/22. Fish and Wildlife received a complaint of contaminated soil being excavated on 6/20/22 and notified us of said complaint on 6/21/22. While on site, heavily oily stained soil in the ditch and petroleum liquid in the storm drains was observed. A heavy diesel smell was emanating from the storm drain and the drainage ditch. Per Richard Stiffler, the conveyance system leads to Mormon Slough. An investigation was conducted by City of Stockton and there was no evidence of contamination at Mormon Slough. The City of Stockton hired Ponder Environmental Services to conduct clean up. Ponder Environmental is cleaning the impacted storm drains and excavating the contaminated drainage ditch. Per Ponder Environmental, approximately 13 20-yard roll off bins of contaminated soil and 2.5 40-yard roll off bins of vegetation had been generated from excavation of the ditch. No roll off bins have been hauled off for disposal. Per Ponder Environmental, 60,000 gallons of contaminated liquid have been generated from storm drain cleanup and are being stored at 2500 Navy Drive, Stockton CA. Waste generated is being profiled for proper disposal. I generated a complaint, created Prop 65 and notice to abate. Emailed notice to abate to richard.stiffler@stocktonca.gov. Richard Stiffler generated a spill report (#22-3507). Spill report was forwarded to Richard McClellon with the Solid Waste unit. 06/22/2022 Met on site with John Murphy, Holly Young, and Andrew Taylor. Witnessed ALANIZ sampling. Created an email chain with the Waterboard, Fish and Wildlife, EHD, and City of Stockton. Emailed a summary of the incident to John Murphy. 06/22/2022 I received an update for spill report 22-3507. I looked up the spill report log and VANG-LEE found that it was assigned to inspector Gaby Garcia. I called Gaby and confirmed it was her complaint. Fowarded the updated spill report to Gaby's email. 5105 rpt Page 2 of 10