SR0082895_SSCR - Laserfiche WebLink

Home Browse Search

Limited Site Investigation Irerracon Vacant Property ■Tracy, California November 13, 2020 ■Terracon Project No. NA197074 5.1 Soil Analytical Results Based on the data collected during this limited site investigation, TPH-GRO was reported at maximum concentrations of 2,300 mg/Kg at 8 feet bgs in soil boring SB7, near the pipeline area, and TPH-GRO extended to a depth of 14 feet bgs. TPH-GRO was not reported above the laboratory reporting limits in the sample collected at SB7 at a depth of 20 feet bgs, which supports that the vertical delineation of impact was achieved at this location. TPH-DRO was reported at maximum concentrations of 5,000 mg/Kg at 8 feet bgs in soil boring S137, near the pipeline area, and TPH-DRO extended to a depth of 14 feet bgs. TPH-DRO was not reported above the laboratory reporting limits in the sample collected at SB7 at a depth of 20 feet bgs, which supports that the vertical delineation of impact was achieved at this location. TPH-MORD was reported at maximum concentrations of 5,000 mg/Kg at 8 feet bgs in soil boring S137, and TPH-MORO extended to a depth of 14 feet bgs. TPH-MORO was not reported above the laboratory reporting limits in the sample collected at S137 at a depth of 20 feet bgs, which supports that the vertical delineation of impact was achieved at this location. TPH-MORD was also reported at a concentration of 5,400 mg/Kg at SB 14 at a depth of 8 feet bgs from the stockpile material. Several VOCs were reported in samples collected from the site, but only 1,1,2-Trichloroethane was reported above Commercial/Industrial SLs and RSLs at a maximum concentration of 26 mg/Kg in soil sample SB14-8 from the stockpile soil. OCPs were not reported above laboratory reporting limits in the soil samples collected. CHs were reported in sample S138-1 above the laboratory reporting limit, but did not exceed applicable SLs or RSLs. The soil analytical results are summarized in Table 1 of Appendix B. 6.0 INVESTIGATION DERIVED WASTE A total of eight 55-gallon drums of drill cuttings and two 55-gallon drums of decontamination rinse water were containerized during the field activities. Each drum was properly secured and labeled prior to disposal pending laboratory analysis. Based on the laboratory results presented in Table 1, DTSC's California Characteristics of Toxicity 22 CCR § 66261.24 columns, the soil samples collected during the investigation are non- hazardous and not considered a regulated waste. Responsive ■ Resourceful ■ Reliable 6