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2020-02-26_REVISION - M2002004
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2020-02-26_REVISION - M2002004
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Last modified
12/27/2024 5:38:41 PM
Creation date
2/26/2020 1:33:04 PM
Metadata
Fields
Template:
DRMS Permit Index
Permit No
M2002004
IBM Index Class Name
REVISION
Doc Date
2/26/2020
Doc Name
Adequacy Review Response
From
Resource Hydrogeologic Services
To
DRMS
Type & Sequence
TR7
Email Name
JPL
Media Type
D
Archive
No
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Title: Sampling and Analysis Plan for Environmental Control Number: Revision Date: Page 7 of 30 <br /> Groundwater Monitoring I PUE.EN.D.026.04 2/19/2020 <br /> The casing stick-up height will be measured during each monitoring event. Any change in <br /> height of the casing above ground surface or concrete pad shall be noted. If the distance <br /> changes more than 0.04 feet above a concrete pad, GCC will have the measuring point <br /> resurveyed to verify accuracy of static water elevations. <br /> 3.3 Field Water Quality Measurements <br /> Field water quality parameters (i.e., temperature, pH, and specific conductance) will be <br /> measured with a calibrated meter at each sample location(Table 1). These field measurements <br /> will be taken after each purge volume and at the time of sample collection and recorded on <br /> water quality sampling forms (Appendix A). Separate aliquots of water are used to monitor <br /> field parameters (i.e., samples for laboratory analysis will not be used or reopened for field <br /> measurements).Field meters will be calibrated at the beginning of each day in accordance with <br /> the manufacturer's specifications. Calibration information and results will be documented on <br /> the field form or a field notebook each time a field instrument is calibrated for use in the <br /> sampling activities. <br /> 3.4 Groundwater Sample Collection Procedures <br /> Groundwater sampling procedures, measurements and observations will be recorded on an <br /> appropriate field reporting form(Appendix A).The following typical sampling procedures will <br /> be followed to ensure that water quality can be reliably compared from well to well and from <br /> sampling event to sampling event and that the data are reproducible. <br /> Field water quality parameters(pH, specific conductance, and temperature) will be measured <br /> at removal of the first wetted casing volume and following removal of each subsequent wetted <br /> casing volume. If applicable or practicable, the groundwater sample will be collected <br /> following the removal of the third wetted casing volume if field water quality parameters show <br /> relative stability(within approximately 10%)and two or more parameters show no significant <br /> trend of increasing or decreasing value. If the meter readings for pH, temperature and <br /> conductivity do not stabilize, field personnel need only remove five casing volumes before <br /> taking a groundwater sample. <br /> Purging of each well will be accomplished with either a dedicated and disposable bailer or a <br /> dedicated in-situ pump system. During the purging process,temperature,pH,and conductivity <br /> are measured and entered on the field sampling form after each casing volume is removed. At <br /> all times, purging and sampling equipment will not be allowed to come into contact with the <br /> ground or other potentially contaminated surface. <br /> Water samples to be analyzed for dissolved metals will be collected in a dedicated,disposable <br /> plastic intermediate transfer container for filtration in the field which shall be a I-gallon new, <br /> disposable,poly cubitainer or similar appropriate container. Samples will be filtered through a <br /> 0.45-micron disposable filter cartridge directly into laboratory-prepared containers, using <br /> dedicated, disposable tubing. If a bailer is used to collect the sample, a standard peristaltic <br /> pump with appropriate environmental grade tubing shall be used to force the sample from the <br /> intermediate transfer container through the filter. If a dedicated in-situ pump system is utilized <br /> to collect the sample, the filter shall be connected to the discharge tubing allowing the pump <br /> pressure to force the sample through the filter. The new filter cartridge shall be purged with <br /> sample water by the method described previously,allowing time to observe proper function of <br /> the filter demonstrating clear water production prior to filling the subject sample bottle(s). <br /> Sample containers provided by the lab typically contain a nitric acid preservative. If this is not <br /> the case,preservatives will be added immediately after the samples are filtered. In the standard <br />
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