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Presto, Carol [EHD] <br />From: Carlos Sanchez <Carlos.Sanchez@usecology.com > <br />Sent: Monday, May 9, 2022 2:41 PM <br />To: Presto, Carol [EHD] <br />Subject: RE: COOTAH6UH - 6540 S Austin Rd, Stockton - sodium hydroxide release on <br />4/28/2022 <br />CAUTION: This email is originated from outside of the organization. Do not click links or open attachments unless you recognize the <br />sender and know the content is safe. <br />I received your information from John Brainard, BNSF Railway Load and Ride Solutions Manager. I was looking for a bit <br />more information regarding the sodium hydroxide clean up from 4/28/2022and John suggested I reach out to you <br />instead. <br />Do you know who the responsible party was- Generator of waste was R+L Carriers. <br />How was the spill cleaned up and was a pH taken afterward- Spill was cleaned up inside trailer by adding a <br />neutralizing solution. Recoverable product was transferred into poly tote(s) for disposal. PH of floor after clean <br />up was —6-7. <br />How much waste was generated- Generated 1 x Poly Tote with —225g of Sodium Hydroxide / Potassium <br />Hydroxide Mixture and 7 x55g drums of used ppe/plastic/debris ( neutralized) <br />Where was the waste taken to- Waste is still on site awaiting pick up for disposal later this week. <br />I was also looking to get a copy of the waste manifest and any before and after photos of the spill that you may have. I <br />can send you a copy of waste manifest once it is picked up. <br />Thank you. <br />Carlos Sanchez <br />Emergency Response Manager Northern California Region <br />carlos.sanchez@usecology.com <br />0:916.371.7202 I c: 91 , <br />US ecology <br />24-Hour Emergency Response: (800) 899-4672 <br />From: Presto, Carol [EHD] <cpresto@sjgov.org> <br />Sent: Monday, May 9, 2022 2:14 PM <br />To: Carlos Sanchez <Carlos.Sanchez@usecology.com > <br />Subject: COOTAH6UH - 6540 S Austin Rd, Stockton - sodium hydroxide release on 4/28/2022 <br />CAUTION: This email originated from outside of the organization. Do not click links or open attachments unless you recognize the <br />sender and know the content is safe. <br />This email came from an external source, please take caution when interacting with it. <br />1