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Central Valley Regional Water Quality Control Board <br /> 23 February 2022 <br /> Page 4 <br /> Nestle Response: <br /> Samples will be analyzed for volatile organic compounds using USEPA Method TO-15 with selective ion <br /> monitoring (SIM) using the unrestricted full analyte list as reported by the laboratory and consistent <br /> with prior soil vapor sampling events. <br /> Water Board Comment 7: <br /> Requested Action:Central Valley Water Board staff request to observe the field activities. Please provide <br /> Central Valley Water Board staff with the field dates for the soil vapor probes installation and <br /> sub-slab/indoor air activities when scheduled.At a minimum, please provide five working days'notice <br /> prior to field activities with more notification appreciated. <br /> Nestle Response: <br /> Comment noted; Haley&Aldrich will notify the Water Board in advance of the field activities as <br /> requested. <br /> Closing <br /> Haley&Aldrich appreciates the opportunity to respond to the comments from Water Board staff on the <br /> Work Plan, and looks forward to work with Water Board staff in the implementation of this work. <br /> Sincerely yours, <br /> HALEY&ALDRICH, INC. <br /> Aw jw/� <br /> Michael Calhoun, PG, CHG <br /> Program Manager <br /> Peter Bennett, PG, CHG <br /> Principal Hydrogeologist <br /> c: Nestle USA, Inc.; Attn: Sven Vetter <br /> Nestle USA, Inc.; Attn: Christina Armstrong <br /> Ripon Public Library;Attn: Melinda Kopp <br /> San Joaquin County Public Health Services;Attn:Adrienne Ellsaessar, R.E.H.S <br /> City of Ripon; Attn: Kevin Werner <br /> \\haleyaldrich.com\share\oak_common\Nestle\Nestle Ripon\6.Supplemental Investigations\6.2 VI Assessment\2021_08 VI Evaluation WP\Response to <br /> Comments\2022_0222_HAI_Response to Comments—VI WP_F.docx <br /> �EKICH <br />