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Stockton Propeller Sampling and Analysis Plan <br /> Stockton Propeller Inc. <br /> Sampling & Analysis Plan <br /> Table of Contents <br /> 1 Introduction------------------------------------------------------------------------------------------------------------------1 <br /> 2 Background-------------------------------------------------------------------------------------------------------------------5 <br /> 2.1 Site History-------------------------------------------------------------------------------------------------------------5 <br /> 2.2 Septic Tanks------------------------------------------------------------------------------------------------------------5 <br /> 2.3 Summary of Regulatory Activity----------------------------------------------------------------------------------7 <br /> 2.3.1 San Joaquin County Environmental Health Department-------------------------------------------- 7 <br /> 2.3.2 City of Stockton ----------------------------------------------------------------------------------------------- 8 <br /> 2.3.3 California Department of Toxic Substances Control ------------------------------------------------- 8 <br /> 2.3.4 Central Valley Regional Water Quality Control Board----------------------------------------------- 9 <br /> 2.3.5 GeoTracker----------------------------------------------------------------------------------------------------- 9 <br /> 2.3.6 ECHO Report--------------------------------------------------------------------------------------------------- 9 <br /> 2.4 Sensitive Receptors------------------------------------------------------------------------------------------------10 <br /> 2.5 Depth to Groundwater--------------------------------------------------------------------------------------------10 <br /> 3 Proposed Investigation Tasks------------------------------------------------------------------------------------------12 <br /> 3.1 Septic Tank Content-----------------------------------------------------------------------------------------------12 <br /> 3.2 Septic Tank-----------------------------------------------------------------------------------------------------------13 <br /> 3.3 Leach Field-----------------------------------------------------------------------------------------------------------13 <br /> 3.4 Subsurface Soil Borings-------------------------------------------------------------------------------------------13 <br /> 3.5 Soil Boring Decommissioning------------------------------------------------------------------------------------16 <br /> 3.6 Groundwater Well Installation----------------------------------------------------------------------------------16 <br /> 3.7 Groundwater Well Development and Sampling------------------------------------------------------------19 <br /> 3.8 Groundwater Well Abandonment -----------------------------------------------------------------------------19 <br /> 3.9 Investigation Derived Waste ------------------------------------------------------------------------------------19 <br /> 4 Site Investigation Report------------------------------------------------------------------------------------------------19 <br /> Blankinship&Associates, Inc. i September 23, 2022 <br /> NES, Inc. <br />