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2. During sample collection, make sure that the pump discharge line or the bailer does not <br /> contact the sample container. <br /> 3. Place the sample into appropriate, labeled containers. Samples collected for VOC, acidity <br /> and alkalinity analysis must not have any headspace. All other sample containers must be <br /> filled with an allowance for ullage. <br /> 4. All samples requiring preservation must be preserved as soon as practically possible, <br /> ideally immediately at the time of sample collection. If preserved VOC vials are used, <br /> these will be preserved with concentrated hydrochloric acid by ASB personnel prior to <br /> departure for the field investigation. For all other chemical preservatives, SESD will use <br /> the appropriate chemical preservative generally stored in an individual single-use vial as <br /> described in the SESD Operating Procedure for Field Sampling Quality Control (SESDPROC- <br /> 011). Preservation requirements for groundwater samples are found in the USEPA Region <br /> 4 Analytical Support Branch Laboratory Operations and Quality Assurance Manual <br /> (ASBLOQAM). <br /> B.14.4. Quality Control <br /> If possible, a control sample should be collected from a location not affected by the possible <br /> contaminants of concern and submitted with the other samples. This control sample should be <br /> collected as close to the sampled area as possible and from the same water-bearing formation. <br /> Equipment blanks should be collected if equipment is field cleaned and re-used on-site or if <br /> necessary to document that low-level contaminants were not introduced by pumps, bailers or <br /> other sampling equipment. <br /> B.14.5. Records <br /> Information generated or obtained by SESD personnel will be organized and accounted for in <br /> accordance with SESD records management procedures found in SESD Operating Procedure for <br /> Control of Records, SESDPROC-002. Field notes, recorded in a bound field logbook, will be <br /> generated, as well as chain-of-custody documentation in accordance with SESD Operating <br /> Procedure for Logbooks, SESDPROC-010 and SESD Procedure for Sample and Evidence <br /> Management, SESDPROC-005. <br /> B.15. Standard Practice for the Inspection and Maintenance of Groundwater <br /> Monitoring Wells <br /> B.15.1. Introduction <br /> Groundwater monitoring wells are commonly used for obtaining groundwater samples, <br /> groundwater elevation measurements, and aquifer hydraulic parameters. Because of natural <br /> processes and human activities,the condition of groundwater monitoring wells may deteriorate <br /> with time. If the deterioration of a particular monitoring well is not documented and corrected, <br /> decisions based upon data collected from that well may be adversely affected. This procedure <br /> provides a standard practice for maintaining a record of the condition of a well and remediating <br /> Daub &Associates, Inc. Page B-33 Natural Soda LLC 2022 SAP <br />