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Complaint Investigation Summary Report #: 5105 <br />COMPLAINT ID: COPFPNNPH Site Location: 725 WANDERSON ST, STOCKTON CA 95206 <br />Activity Summary <br />Activity Date Recorded by <br />08/10/2022 Reviewed analytical results received via email for all samples collected. GARCIA-MEJIA <br />1.Lab: Sparger Technologies (ELAP Certified). Samples are from the canal soil <br />collected on 6/22/2022. 10 soil samples were collected. All 10 samples were <br />tested for TPH and CAM17. Only 4 samples were tested for VOC 8260. <br />Sample ID: 1A-SP1. <br />CAM17 Lead=91mg/kg. TPH motor oil=360mg/kg <br />Sample ID: 1B-SP2. <br />CAM17 Lead=297mg/kg. TPH motor oil-450mg/kg. <br />Sample ID: 2A-5P3 <br />CAM17 Lead=101mg/kg. TPH Diesel= 2,890mg/kg. Hazardous volatiles not <br />detected. <br />Sample ID: 2B-SP4 <br />CAM17 Lead= 240 mg/kg. TPH Diesel= 1,950mg/kg. Hazardous volatiles not <br />detected. <br />Sample ID: 3A-SP5 <br />TPH Diesel= 480mg/kg. <br />Sample ID: 3B-SP6 <br />CAM17 Lead= 194 mg/kg. TPH diesel= 170mg/kg. TPH motor oil= 370mg/kg. <br />Sample ID: 4A-SP7 <br />TPH diesel= 500mg/kg. TPH motor oil= 530mg/kg. Hazardous volatiles not <br />detected. <br />Sample ID: 4B-SP8 <br />TPH diesel= 180mg/kg. TPH motor oil= 420mg/kg. Hazardous volatiles not <br />detected. <br />Sample ID: PE1-SP9 <br />TPH diesel= 13,500mg/kg. <br />Sample ID: TUL-SP10 <br />CAM17 Lead=51mg/kg. TPH motor oil= 400mg/kg. <br />Lab: McCampbell Analytical (ELAP Certified). Samples are from the soil and <br />vegetation contained in the roll off bins that had been dug up before our <br />notification. One sample of vegetation and soil each were collected and tested for <br />CAM 17, TPH and PCB's. Samples were collected on 6/17/2022. Fish Bioassay <br />test was done on the vegetation sample and that sample was collected on <br />6/15/2022. <br />Sample ID: 2206A34-001A (Vegetation) <br />No PCB's were detected. TPH gas= 220 mg/kg. TPH diesel=31,000 mg/kg. TPH <br />motor oil= 10,000mg/kg. Fish Bioassay results were not hazardous. <br />Sample ID: 2206681-001A (Soil) <br />No PCB's were detected. TPH diesel= 17,000mg/kg. TPH motor oil= 4,300mg/kg. <br />Lab: Sparger Technologies (ELAP Certified). 7 water samples from the frac <br />tanks and 2 soil samples from the roll off bins were collected on 7/14/2022 and <br />tested for TPH, VOC 8260, and CAM 17. <br />5105.rpt <br />Page 6 of 10