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Complaint Investigation Summary Report #: 5105 COMPLAINT ID: C00051676 Site Location: 5100 HVVY 12 Activity Summary Activity Date Recorded by 02/26/2020 Reviewed Notice to Abate with Elena Manzo (EHD). Amended the Notice to MURO Abate. Emailed the amended Notice to Abate to Henry Rotor at: Henry@alegretrucking.com 02/26/2020 Henry Rotor, 209-810-5209, called to report that the spilled oily substance was not MURO oil. It was a product used for dust control. I requested an SDS Sheet of the product.. Henry emailed the SDS sheets for the product they use for dust control. He said there are two, 1) Magnesium Lignosulfonate Solution, Intermediate, and Heavy; and 2) Plaza 48% Solids Red Liquor. Henry said the Plaza 48 `)/0 is premixed into the Magnesium Lignosulfonate. Reviewed the SDS sheets, and found they exhibit toxicity to fish. I called SJ Valley Air Pollution Control, (209) 557-6400 and spoke to supervisor, James Sanders. I provided spill information. I told him the facility provided SDS sheet for the chemical name Magnesium Lignosulfonate Solution which shows toxicity to fish. James Sanders told me he will research will get back to me. 11:58 PM Received call from Robert Fowler (co-owner of Frank C Alegre Trucking) 209-334-2112. He wanted to know why they have to take measures such as sampling and cleanup of the storm line since the material is 'organic' and used on the ground. I explained that the reason a sample will have to be analyzed is to confirm their claim that it is non-hazardous. I explained that the SDS sheet for the Magnesium Lignosulfonate Solution provided by Henry Rotor shows it exhibits toxicity to fish. He indicated they do not have fish so he doesn't understand why all is necessary. I referred him to Elena Manzo and provided her phone number. 2:08 PM Tony Alegre (Frank C. Alegre Trucking) came to EHD office and met with Elena Manzo (EHD) and I. He wanted clarification since he was having a difficult time understanding how something that is applied to the ground for dust control, was considered hazardous. Elena Manzo explained to Tony Alegre that the chemicals they used are considered hazardous because they exhibit aquatic toxicity. Elena Manzo discussed that they will need to perform cleanup of the chemical, and that we will need to verify adequacy. 02/27/2020 Co-inspection with Claudia Muro (lead inspector). The facility was able to lift the storm drain cover for us to inspect it; it was full of dry debris — no spilled material was present, minor staining was visible inside the storm drain sidewall. Surface staining was cleaned up using absorbent; all waste was containerized and placed onside pending profiling and disposal. Clean up was deemed adequate. The spilled dust control chemical application was halted pending further research by the facility into it's application. See C. Muro narrative for more details. MANZO 51 05r pt Page 3 of 6