2020-02-26_REVISION - M2002004

• 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

F
tle: Sampling and Analysis Plan for Environmental Control Number: Revision Date: Page 25 of 30
roundwater Monitoring PUE.EN.D.026.04 2/19/2020
Creation It,: Revision Date:
GCC 02/18/2020 2/18/2020
Control Number:
PUE.EN.P.003.01 Page_ Iof4
Title: GCC Rio Grande Pueblo Plant Groundwater Monitoring Well Compliance Sampling
1) Prior to day of sampling, obtain necessary equipment and materials (listed below in
following section) to sample groundwater monitoring wells per compliance
requirements.
2) Calibrate YSI Pro 1030(or similar)water quality meter for pH and speck conductivity
per manufacturer's instructions in office or lab setting prior to going to field.
3) Complete Workplace Examination,per PUE.SA.P.015,and review with crew.
4) Observe and document in official record (Groundwater Sampling Record)any unusual
conditions at or near well, especially including potential signs of tampering such as
unlocked wellhead,removed cap,damage,etc. Take photo(s)as needed.
5) Set up sampling station
a) Place water level indicator(WLI)and bailer(still in sealed factory bag) beside well.
b) Place graduated bucket for purge water collection&volume measurement nearby.
c) Place cooler containing bags of ice, "GW-Compliance"sample bottle set(s), bag or box of
disposable nitrile gloves, sealed new 0.45 pm filter(s), sealed new syringe(s), and bailer
cord nearby.
6) Measure and record well water level and well head stick-up
a) Unlock wellhead padlock. Remove wellhead cap or j-plug.
b) Measure depth to water (DTW) with clean/decontaminated WLI to the hundredth of foot
from top of casing. Record value on GW Sampling Record.
c) Measure and record total depth of well(TD)with WLI from top of casing.
d) Measure and record well head stick-up(SU)from ground surface to top of casing.
e) Clean/decontaminate probe and tape with Liquinox detergent solution followed by distilled
water rinse when done with use at this well.
f) If no water is present in well when measured,or water level is found to be within 0.25
feet of well TD(the distance between the lowest screen slot and well bottom cap),
this monitoring event shall be designated "dry" on the Groundwater Monitoring
Record. No collection of water quality field parameters or a sample for lab analysis
is possible. Retrieve and decontaminate WLI, secure wellhead and rig down all
monitoring equipment.
7) Calculate three-wellbore volume purge
a) Calculate water column height as TD—DTW=WC,where
TD is total depth (ft) measured from top of casing (TOC)
DTW is depth to water(ft) measured from top of casing(TOC)
WC is water column (ft)
b) Calculate volume of WC as WC X 0.163= 1 WBV,where
WC is water column (ft)
0.163 is multiplier for gallons per foot(gal/ft)for a 2"schedule 40 well
1 WBV is a single wellbore volume(gal)
c) Calculate purge volume of prior to sampling as 1 WBV X 3=3WBV,where
1 WBV is a single wellbore volume(gal)
3WBV is three wellbore volumes(gal)
d) Record calculated single and triple wellbore volumes on the GW Sampling Record.