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TGI — Indoor Air, Ambient Air, Sub-Slab Vapor, and Soil Vapor 04ARCADIS <br /> Sampling for Analysis via USEPA Compendium Method TO-10A <br /> Rev: 0 1 Rev Date: March 10, 2023 <br /> 3. Turn on the low volume air sampler. Average the pre-sampling and post-sampling air flow rates to calculate <br /> the total sample volume. The calculation for a 1-liter flow rate for 24 hours is shown below. Adjust as needed. <br /> L minutes <br /> 1 x 60 x 24hours = 1,440 Liters <br /> minute hour <br /> 4. Enter total liters sampled on the sample form and COC. <br /> 9 Waste Management <br /> No specific waste management procedures are required. <br /> 10 Data Recording and Management <br /> Digital data collection is the Arcadis standard using available FieldNow®applications that enable real-time, <br /> paperless data collection, entry, and automated reporting. Paper forms should only be used as backup to <br /> FieldNow®digital data collection and/or as necessary to collect data not captured by available FieldNow® <br /> applications. The Field Now®digital form applications follow a standardized approach, correlate to most TGIs and <br /> are available to all projects accessible with a PC or capable mobile device. Once the digital forms are saved <br /> within FieldNow®, the data is instantly available for review on a web interface. This facilitates review by project <br /> management team members and SMEs enabling error or anomalous data detection for correction while the staff <br /> are still in the field. Continual improvements of FieldNow®applications are ongoing, and revisions are made as <br /> necessary in response to feedback from users and subject matter experts. <br /> Notes will be recorded on the sampling form (attached), with notations including, but not limited to project name, <br /> sample date, sample time, sample location (e.g., description and global positioning system (GPS) coordinates if <br /> available), sample start and end times, PUF cartridge ID, PUF sample ID, and total volume of air drawn through <br /> the PUF. Notes and pictures taken during the sampling process that cannot be collected using FieldNow® <br /> applications will be compiled and uploaded to the project specific folder on SharePoint and/or Collaboration Hub. <br /> Printed copies of this Technical Guidance Instruction are uncontrolled. Page 12 of 14 <br />