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Odorous Soil <br />Evaluate Extent <br />Visibly <br />of Impacted Soil <br />Collect and TestConfirmation Soil Samples <br />(Section 2.3 of SMP) <br />Yes <br />Encountered <br />Figure 2-2 <br />Former Pilkington North America Site <br />Lathrop, CA <br />July 2019 <br />EKI B90047.00 <br />Decision Diagram for Visibly Stained or Odorous Soil <br />Notify RWQCB <br />Were Soil Screening <br />Levels Exceeded? <br />Stained or <br />(Section 2.3 of SMP) <br />Sample and Test Material <br />Excavate Soil as Needed to <br />Meet Soil Screening Levels or <br />Until Groundwater Encountered <br />Were Soil Screening <br />Levels Exceeded? <br />No <br />Yes <br />Collect Waste CharacterizationSamples for Soil Stockpiles <br />(4-point composite per 500 cy) <br />(Section 2.5.2 of SMP) <br />Dispose at <br />Off-Site Permitted <br />Disposal Facility <br />Abbreviations: <br />cy = cubic yards <br />SMP = Soil Management Plan (EKI, 2019) <br />References: <br />EKI, 2019. Soil Management Plan, Former Pilkington North <br />America Site, 500 East Louise Avenue, Lathrop, California, <br />dated July 2019. <br />1. <br />Extent of Impacted <br />Soil Can Be <br />Fully Excavated <br />Extent of Impacted <br />Soil Cannot Be <br />Fully Excavated <br />Due to Access <br />Limitations <br />Consult with <br />RWQCB to Leave <br />Impacted Soil <br />In Place <br />Does RWQCB <br />Approve to Leave <br />In Place? <br />Yes <br />Survey Location of <br />Impacted Soil ForYesDoes Site Owner <br />Choose to Leave <br />In Place? <br />Future Reference <br />During Construction in <br />Limited Access Area <br />No <br />RWQCB = Regional Water Quality Control Board <br />NoContinue <br />Construction <br />Activities