SR0085755_SSCRPT - Laserfiche WebLink

Home Browse Search

Lennar Homes of California Mountain House Creek, Parcel L, Tract 3424, Tracy 4943.410.103 Modified Phase I Environmental Site Assessment 6.2 ANALYTICAL RESULTS The reported concentrations for OCPs and lead are below applicable USEPA and CAL-EPA screening levels for residential soil. The reported arsenic concentrations are within typical naturally occurring background concentrations. The following is a summary of the laboratory results. • OCPs were not detected above the laboratory reporting limits in any of the soil samples. • Arsenic concentrations ranged from 5.25 to 6.75 milligrams per kilogram (mg/kg). The results are above the applicable screening level, but within naturally occurring background arsenic concentrations for the vicinity of the Property and are not indicative of anthropogenic impacts. • Lead concentrations ranged from 8.8 to 11 mg/kg, which are below the current residential screening level of 80 mg/kg. The laboratory report is presented in its entirety in Appendix H. 7.0 FINDINGS AND CONCLUSIONS This assessment included a review of local, state, tribal, and federal environmental record sources, standard historical sources, aerial photographs,fire insurance maps and physical setting sources. A reconnaissance of the Property was completed to review site use and current conditions to check for the storage, use, production, or disposal of hazardous or potentially hazardous materials and to conduct written/oral interviews with persons knowledgeable about current and past site use. The site reconnaissance and records review did not find documentation or physical evidence of soil or groundwater impairments associated with the use or past use of the Property. A review of regulatory databases maintained by county, state, tribal, and federal agencies found no documentation of hazardous materials violations or discharge on the Property and did not identify contaminated facilities within the appropriate ASTM search distances that would reasonably be expected to impact the Property. An agrichemical assessment did not identify any concentrations of OCPs, arsenic, or lead in surface soil that exceed relevant screening levels and/or typical naturally occurring background concentrations. Based on the findings of this assessment, no RECs, no historical RECs, and no controlled RECs were identified for the Property. ENGEO has performed a modified phase I environmental site assessment in general conformance with the scope and limitations of ASTM E1527-13 and the standards and practices of the All Appropriate Inquiry— Final Rule (40 Code of Federal Regulations Part 312). It is our opinion that the findings of this study are based on a sufficient level of information obtained during our contracted scope of services to render a conclusion as to whether additional appropriate investigation is required to identify the presence or likely presence of a REC. CNGEO Page 110 March 15, 2021 Expect Excellence