The Phase I Addendum includes results of sampling and analysis, limited to results of lead in soil from lead-based paint or polychlorinated biphenyls (PCBs) in soil from electrical transformers that is submitted to the Department along with or after the submittal of a Phase I Environmental Site Assessment for the site. If DTSC concurs with the findings of a the Phase I Environmental Site Assessment that the only recognized environmental conditions associated with the site are lead in soil from lead-based paint or polychlorinated biphenyls (PCBs) in soil from electrical transformers, results of sampling and analysis for these issues can be submitted as part of the Phase I Environmental Site Assessment in a Phase I Addendum, rather than a Preliminary Environmental Assessment. Sampling and analysis must be conducted in accordance with the procedures for sampling for lead in soil from lead-based paint (Cal. Code Regs., tit. 22, div. 4.5, ch. 51.5, § 69105) and sampling for PCBs in soil from electrical transformers (Cal. Code Regs., tit. 22, div. 4.5, ch. 51.5, § 69107). DTSC can be consulted during development of sampling strategies. Additionally, please notify DTSC prior to sampling activities.