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To: Nathan Gustus <nate.gustus@sitelogiq.com>; Luke Castle <lcastle@condorearth.com> <br />Subject: RE: Riverbank WWTP Soil Sampling <br /> <br />Hi Nate, <br /> <br />No dioxins/furans yet. I just emailed the lab to find out status. <br /> <br />John Lane, PG <br />Condor EarthOffice: 209-938-1061 <br />Mobile: 209-743-7443 <br />jlane@condorearth.com <br /> <br />From: Nathan Gustus <nate.gustus@sitelogiq.com> <br />Sent: Monday, September 30, 2024 9:00 AM <br />To: John Lane <jlane@condorearth.com>; Luke Castle <lcastle@condorearth.com> <br />Subject: RE: Riverbank WWTP Soil Sampling <br /> <br />Hi John, <br /> <br />How is the report coming along? Did you receive the final dioxins/furans results yet? <br /> <br />Nate <br /> <br />Nathan​​​​ Gustus |Sr. Project Manager |M: 916.693.7140 <br /> <br />From: John Lane <jlane@condorearth.com> <br />Sent: Wednesday, September 11, 2024 9:05 AM <br />To: Nathan Gustus <nate.gustus@sitelogiq.com>; Luke Castle <lcastle@condorearth.com> <br />Subject: RE: Riverbank WWTP Soil Sampling <br /> <br />CAUTION: This is an external email. DO NOT click links or open attachments unless you recognize the sender and <br />know the content is safe. <br /> <br />Hi Nate, <br /> <br />We have all the results now except for the dioxins/furans on the one sample. That will come in later <br />this month. We are compiling the report for you in the interim. We did see elevated lead in two <br />borings, DP-15 and DP-18, which are west of and nearest the facility’s dumpster (see attached <br />figure). Lead in these two composite samples were 270 and 240 mg/kg, respectively, which exceed <br />the DTSC-recommended screening level of 80 mg/kg for residential soils, but is below the <br />commercial/industrial recommended screening level of 500 mg/kg. <br /> <br />I will work on getting you the anticipate “change order” billings for permitting and the additional <br />analysis.