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Mr . Giuseppe Sanfilippo October 31 , 2022 Page 2 DTSC recommends that the following issues be evaluated in the Hazards and Hazardous Materials section of the MND : 1 . A State of California environmental regulatory agency such as DISC , a Regional Water Quality Control Board ( RWQCB ) , or a local agency that meets the requirements of Health and Safety Code section 101480 should provide regulatory concurrence that THE PROJECT SITE is safe for construction and the proposed use , 2 . The MND should acknowledge the potential for historic or future activities on or near the Project site to result in the release of hazardous wastes/ substances on the Project site . In instances in which releases have occurred or may occur , further studies should be carried out to delineate the nature and extent of the contamination , and the potential threat to public health and /or the environment Should be evaluated . The MND should also identify the mechanism ( s ) to initiate any required investigation and /or remediation and the government agency who will be responsible for providing appropriate regulatory oversight . 3 . Refiners in the United States started adding lead compounds to gasoline in the 1920s in order to boost octane levels and improve engine performance , This practice did not officially end until 1992 when lead was banned as a fuel additive in California . Tailpipe emissions from automobiles using leaded gasoline contained lead and resulted in aerially deposited lead ( ADL ) being deposited in and along roadways throughout the state . ADL - contaminated soils still exist along roadsides and medians and can also be found underneath some existing road surfaces due to past construction activities . Due to the potential for ADL - contaminated soil , DTSC recommends collecting soil samples for lead analysis prior to performing any intrusive activities for the Project described in the MND . 4 . If any projects initiated as part of the proposed Project require the importation of soil to backfill any excavated areas , proper sampling should be conducted to ensure that the imported soil is free of contamination . DTSC recommends the imported materials be characterized according to DTSC ' s 2001 Information Advisory Clean Imported Fill Material , 5 . If any sites included as part of the proposed Project have been used for agricultural , weed abatement or related activities , proper investigation for organochlorinated pesticides should be discussed in the MND . DTSC recommends the current and former agricultural lands be evaluated in accordance with DTSC ' s 2008 Interim Guidance for Sampling Agricultural Properties ( Third Revision ) .