Laserfiche WebLink
KLE/NFELOER <br /> �&ryFl hopk.NpFf SONYou <br /> 6 CONCLUSIONS AND RECOMMENDATIONS <br /> The following conclusion and recommendations are based upon field observations, analytical <br /> results and the noted ESLs. <br /> 6.1 CONCLUSIONS <br /> • Kleinfelder's field observations were negative regarding indications of petroleum <br /> contamination or unusual chemical odors from the soil samples collected from nine soil <br /> probes advanced near the centerline of Benjamin Holt and the proposed storm drain <br /> route. <br /> • The soils observed in the nine probes generally included fat clays with trace silt and <br /> sand from 1 to approximately 3 feet bgs, underlain by a brown to yellowish brown silty <br /> sand and sandy silts with clay to the total explored depth of 6 feet bgs. <br /> • TPHg and TPHd were not detected at or above laboratory reporting limits, which were <br /> well below the ESLs discussed in this report when considering human health and <br /> protection of groundwater as a potential drinking water source. The maximum TPHmo <br /> concentration of 78 mg/kg and the single detection of PCE (49 µg/kg) were found to be <br /> below residential and commercial/industrial land use ESLs and commercial/industrial <br /> and construction/trench worker ESLs <br /> • Based on the information presented in this report Kleinfelder does not recommend <br /> further soil sampling and analyses along the proposed storm drain route <br /> • Although our findings were generally negative, the probing operations only cover a small <br /> fraction of the entire roadway alignment and proposed improvement area. Therefore, if <br /> during roadway improvement, discolored soil and unusual odors are observed, an <br /> experienced environmental professional should be contacted for further evaluation <br /> before continuing to excavate and work in the area of concern. <br /> • Kleinfelder recommends forwarding this report to SJCEHD. <br /> This report and the conclusions and recommendations presented in this report are subject to <br /> the "Limitations" presented below. Any party (other than SJCPW or regulatory agencies having <br /> enforcement jurisdiction for this site) who would like to use this report shall notify Kleinfelder of <br /> such intent in writing. <br /> 133385.4//ST013R0698 Page 10 of 12 January 7,2014 <br /> Copyright 2014 Kleinfelder <br />