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Site Inspection UFP-QAPP Addendum <br />Stockton AASF, Stockton, California <br />949 <br />950 Liquid IDW (i.e., purge water and decontamination fluids) generated during SI activities will be <br />951 containerized in properly -labeled 55 -gallon drums (see SOP 3-05). The containerized IDW will be <br />952 temporarily stored onsite at a location designated by CAARNG. The liquid IDW will not be sampled <br />953 and will assume the PFAS characteristics of the associated groundwater samples collected from <br />954 the source locations. Based on laboratory results, containerized liquid IDW will be managed and <br />955 disposed by ARNG (either by offsite disposal or onsite disposal, with treatment as appropriate) <br />956 under a separate contract in accordance with SOP No. 042A for Treating Liquid Investigation - <br />957 Derived Material (Purge water, drilling water, and decontamination fluids) (EA Engineering, <br />958 Science, and Technology, Inc., 2021). ARNG will further coordinate in advance with the RWQCB <br />959 to ensure proper disposal in accordance with state requirements and the Army Guidance for <br />960 Addressing Releases of PFAS, Q18 (DA, 2018). <br />961 <br />962 Where IDW is allowed to be returned to the ground surface at the source of generation (as <br />963 described above), ARNG will collect global positioning system (GPS) points (i.e., polygons) <br />964 around the location where the IDW was placed. <br />965 <br />966 Other solids such as spent PPE, plastic sheeting, tubing, rope, unused monitoring well <br />967 construction materials, and other environmental media generated during the field activities will be <br />968 disposed of at a licensed solid waste landfill. <br />969 <br />AECOM QAPP Worksheet #17 <br />Page 8 of 10 <br />