USGS Water-Year Summary 2023

450542093105809 GS3-MW4 TCAAP Site

Sand and gravel aquifers (glaciated regions)
Glacial Surficial Sand and/or Gravel

LOCATION - Lat 45°05'42.31", long 93°10'57.74" referenced to North American Datum of 1983, Ramsey County, MN, Hydrologic Unit 07010206, The well is located in the former Twin Cities Army Ammunition Plant (TCAAP) site, 0.8 miles east of the USGS Mounds View office. The well is located approximately 0.5 miles NE of the intersection of US HWY 35W and County Rd. 10 (Mounds View Blvd).

GROUNDWATER RECORDS

WELL CHARACTERISTICS - Depth 15 ft. Upper casing diameter 2 in; top of first opening undefined, bottom of last opening undefined. Well GS3-MW4 is a groundwater observation well that was installed on 03 September 2021 with a Geoprobe 66DT to 15.00 feet. The well is constructed of a 2.00-feet-long, 2-inch-diameter, stainless steel, 0.010-inch slotted, well screen, attached with to length/s of 2-inch-diameter, stainless steel well casing. The well casing measuring point (stickup) was 0.62 feet (886.99 ft. NAVD88, +/- 0.05 ft.) above land surface when measured on 03 September 2021. The open interval of the well is between 10.00 and 15.00 feet below land surface and the total well depth is 15.00 feet below land surface. 

DATUM - Land-surface datum is 886.37 ft above North American Vertical Datum of 1988. Measuring point: Black mark on top of 1.25-inch diameter stainless steel well casing, 0.62 ft above land-surface datum, UNDEFINED BEGIN DATE to present. The measuring point is a black mark on top of the 2-inch diameter stainless steel well casing, which was 0.62 feet above land surface on 03 September 2021. Elevation of the measuring point is 886.99 plus-or-minus 0.05 feet above sea level, North American Vertical Datum of 1988, based on a differential GPS and digital levels survey completed by the U.S. Geological Survey on 16 Nov. 2021.

PERIOD OF RECORD -

Water levels were recorded periodically from 04 October 2021 to the present. Water levels were recorded every 5-minutes from 18 October 2021 at 14:45 CDT to the present, except during the following periods:

26 Oct. 2021 at 12:45-18:00 CDT: due to deleting spike & equilibration data caused by QW sampling.
02 Nov. 2021 at 11:45-16:50 CDT: due to deleting spike & equilibration data caused by QW sampling.
09 Nov. 2021 at 11:05-16:10 CST: due to deleting spike & equilibration data caused by QW sampling.
16 Nov. 2021 at 10:40-15:45 CST: due to deleting spike & equilibration data caused by QW sampling.
01 Dec. 2021 at 14:05-20:55 CST: due to deleting spike & equilibration data caused by QW sampling.
16 Dec. 2021 at 10:15-18:00 CST: due to deleting spike & equilibration data caused by QW sampling.
14 Feb. 2022 at 13:50-22:45 CST: due to deleting spike & equilibration data caused by QW sampling.
17 Feb. 2022 at 12:25-14:00 CST: due to removing sensor from well during a sensor inspection.
10 May 2022 at 11:50-18:50 CDT: due to deleting spike & equilibration data caused by QW sampling.
18 May 2022 at 12:25-14:50 CDT: due to removing sensor from well during a sensor inspection.
14 Jun. 2022 at 11:50-16:05 CDT: due to deleting spike & equilibration data caused by QW sampling.
19 Jul. 2022 at 08:55-16:30 CDT: due to deleting spike & equilibration data caused by QW sampling.
09 Aug. 2022 at 13:00-23:50 CDT: due to deleting spike & equilibration data caused by QW sampling.
10 Aug. 2022 at 10:30-14:10 CDT: due to removing sensor from well during a sensor inspection.
06 Sept. 2022 at 11:20-22:25 CDT: due to deleting spike & equilibration data caused by QW sampling.
06 Oct. 2022 at 07:35-21:30 CDT: due to deleting spike & equilibration data caused by QW sampling.
15 Nov. 2022 at 11:50-22:20 CST: due to deleting spike & equilibration data caused by QW sampling.
16 Nov. 2022 at 12:35-14:10 CST: due to removing sensor from well during a sensor inspection.
13 Feb. 2023 at 11:40-13:05 CST: due to removing sensor from well during a sensor inspection.
29 Mar. 2023 at 07:45-15:10 CDT: due to deleting spike & equilibration data caused by QW sampling.
05 May 2023 at 10:50-13:20 CDT: due to removing sensor from well during a sensor inspection.
08 May 2023 at 08:00-15:55 CDT: due to deleting spike & equilibration data caused by QW sampling.
06 Jun. 2023 at 11:20-16:30 CDT: due to deleting spike & equilibration data caused by QW sampling.
11 Jul. 2023 at 10:30-16:45 CDT: due to deleting spike & equilibration data caused by QW sampling.
14 Aug. 2023 at 19:05 CDT - 16 Aug. 2023 at 12:00 CDT: due to dead station batteries.
14 Sept. 2023 at 08:35-20:35 CDT: due to deleting spike & equilibration data caused by QW sampling.
16 Oct. 2023 at 14:50-20:50 CDT: due to deleting spike & equilibration data caused by QW sampling.
17 Oct. 2023 at 08:20-13:15 CDT: due to deleting spike & equilibration data caused by QW sampling.
13 Nov. 2023 at 07:50-13:15 & 17:05-20:40 CST: due to deleting spike & equilibration data caused by QW sampling.
15 Nov. 2023 at 12:20-13:35 CST: due to removing sensor from well during a sensor inspection.
11 Dec. 2023 at 08:00-18:10 CST: due to deleting spike & equilibration data caused by QW sampling.
29 Jan. 2024 at 07:55-17:25 CST: due to deleting spike & equilibration data caused by QW sampling.
12 Feb. 2024 at 09:55-11:30 CST: due to removing sensor from well during a sensor inspection.
19 Mar. 2024 at 07:45-18:55 CDT: due to deleting spike & equilibration data caused by QW sampling.
17 Apr. 2024 at 07:45-13:30 CDT: due to deleting spike & equilibration data caused by QW sampling.
10 May 2024 at 08:05-14:40 CDT: due to deleting spike & equilibration data caused by QW sampling.
15 May 2024 at 09:10-10:40 CDT: due to removing sensor from well during a sensor inspection.

GAGE - Continuous water level, water temperature, specific conductance, and battery voltage are currently measured with a previously used OTT CTD pressure transducer with a built-in specific conductance sensor. These data were recorded every 5-minutes from 19 November 2021 at 12:45 CST to the present by the same OTT CTD pressure transducer, which had a data logger built into it. The data logger was hung from the top of the 2-inch stainless steel well casing and housed inside the PVC well cap. The pressure transducer was powered by 3 AA alkaline batteries that were inside of the data logger communications rod. Data were downloaded manually and no telemetry at the gage.

COOPERATION - This site was operated from 03 September 2021 to the present by the U.S. Geological Survey as a monitoring well for the USGS Twin Cities Army Ammunition Plant (TCAAP) "Site K" study. The USGS Twin Cities Army Ammunition Plant (TCAAP) "Site K" study is a collaborative study between the U.S. Geological Survey and the U.S. Army.

WATER-QUALITY RECORDS

WELL CHARACTERISTICS - Depth 15 ft. Upper casing diameter 2 in; top of first opening undefined, bottom of last opening undefined. Well GS3-MW4 is a groundwater observation well that was installed on 03 September 2021 with a Geoprobe 66DT to 15.00 feet. The well is constructed of a 2.00-feet-long, 2-inch-diameter, stainless steel, 0.010-inch slotted, well screen, attached with to length/s of 2-inch-diameter, stainless steel well casing. The well casing measuring point (stickup) was 0.62 feet (886.99 ft. NAVD88, +/- 0.05 ft.) above land surface when measured on 03 September 2021. The open interval of the well is between 10.00 and 15.00 feet below land surface and the total well depth is 15.00 feet below land surface. 

DATUM - Land-surface datum is 886.37 ft above North American Vertical Datum of 1988. Measuring point: Black mark on top of 1.25-inch diameter stainless steel well casing, 0.62 ft above land-surface datum, UNDEFINED BEGIN DATE to present. The measuring point is a black mark on top of the 2-inch diameter stainless steel well casing, which was 0.62 feet above land surface on 03 September 2021. Elevation of the measuring point is 886.99 plus-or-minus 0.05 feet above sea level, North American Vertical Datum of 1988, based on a differential GPS and digital levels survey completed by the U.S. Geological Survey on 16 Nov. 2021.

PERIOD OF RECORD -

Water quality samples have been collected periodically from 18 Oct. 2021 to the present.

Water temperature (14.9 ft. BLS):

Water temperature was recorded every 5-minutes from 22 Oct. 2021 at 11:25 CDT to 19 Nov. 2021 at 12:20 CST, except during the following periods:

22 Oct. 2021 at 11:25-11:40 CDT: due to thermistor equilibrating to GW temperature after deployment.
26 Oct. 2022 at 13:00-13:20 CDT: due to deleting spike & equilibration data caused by QW sampling.
02 Nov. 2022 at 11:50-12:30 CDT: due to deleting spike & equilibration data caused by QW sampling.
16 Nov. 2022 at 11:00-11:10 CST: due to deleting spike & equilibration data caused by QW sampling.

Water temperature (15.0 ft. BLS):

Water temperature was recorded every 5-minutes from 19 Nov. 2021 at 12:45 CST to the present, excep

19 Nov. 2021 at 12:45-13:45 CST: due to thermistor equilibrating to GW temperature after deployment.
01 Dec. 2021 at 14:05-17:35 CST: due to deleting spike & equilibration data caused by QW sampling.
16 Dec. 2021 at 10:10-12:30 CST: due to deleting spike & equilibration data caused by QW sampling.
24 Jan. 2022 at 12:50-14:45 CST: due to removing thermistor from well during a site visit.
14 Feb. 2022 at 13:50-16:05 CST: due to deleting spike & equilibration data caused by QW sampling.
17 Feb. 2022 at 12:20-15:30 CST: due to removing thermistor from well during a sensor inspection.
23 Feb. 2022 at 13:50-15:35 CST: due to removing thermistor from well during a site visit.
23 Mar. 2022 at 08:50-10:10 CDT: due to removing thermistor from well during a site visit.
19 Apr. 2022 at 10:25-16:25 CDT: due to removing thermistor from well during a site visit.
10 May 2022 at 10:50-21:30 CDT: due to deleting spike & equilibration data caused by QW sampling.
18 May 2022 at 12:30-18:15 CDT: due to removing thermistor from well during a sensor inspection.
14 Jun. 2022 at 11:50-15:15 CDT: due to deleting spike & equilibration data caused by QW sampling.
19 Jul. 2022 at 09:05-16:20 CDT: due to deleting spike & equilibration data caused by QW sampling.
09 Aug. 2022 at 13:05-19:55 CDT: due to deleting spike & equilibration data caused by QW sampling.
10 Aug. 2022 at 10:35-15:25 CDT: due to removing thermistor from well during a sensor inspection.
06 Sept. 2022 at 11:20-20:45 CDT: due to deleting spike & equilibration data caused by QW sampling.
06 Oct. 2022 at 07:40-20:50 CDT: due to deleting spike & equilibration data caused by QW sampling.
15 Nov. 2022 at 11:55-14:35 CST: due to deleting spike & equilibration data caused by QW sampling.
16 Nov. 2022 at 12:30-17:25 CST: due to removing thermistor from well during a sensor inspection.
13 Feb. 2023 at 11:40-13:30 CST: due to removing thermistor from well during a sensor inspection.
08 May 2023 at 08:05-15:50 CDT: due to removing thermistor from well during a sensor inspection.
06 Jun. 2023 at 11:30-16:20 CDT: due to deleting spike & equilibration data caused by QW sampling.
11 Jul. 2023 at 10:30-16:30 CDT: due to deleting spike & equilibration data caused by QW sampling.
14 Aug. 2023 at 19:05 CDT - 16 Aug. 2023 at 12:00 CDT: due to dead station batteries.
16 Aug. 2023 at 12:05-18:10 CDT: due to removing thermistor from well during a sensor inspection.
14 Sept. 2023 at 08:35-16:55 CDT: due to deleting spike & equilibration data caused by QW sampling.
16 Oct. 2023 at 14:50-20:15 CDT: due to deleting spike & equilibration data caused by QW sampling.
17 Oct. 2023 at 08:20-14:00 CDT: due to deleting spike & equilibration data caused by QW sampling.
13 Nov. 2023 at 07:35-10:45 & 17:25-18:25 CST: due to deleting spike & equilibration data caused by QW sampling.
15 Nov. 2023 at 12:20-16:40 CDT: due to removing thermistor from well during a sensor inspection.
11 Dec. 2023 at 08:00-10:40 & 13:55-15:55 CST: due to deleting spike & equilibration data caused by QW sampling.
29 Jan. 2024 at 07:55-16:35 CST: due to deleting spike & equilibration data caused by QW sampling.
12 Feb. 2024 at 10:00-12:40 CST: due to removing thermistor from well during a sensor inspection.
19 Mar. 2024 at 07:50-19:45 CDT: due to deleting spike & equilibration data caused by QW sampling.
17 Apr. 2024 at 07:50-13:20 CDT: due to deleting spike & equilibration data caused by QW sampling.
10 May 2024 at 08:05-11:45 CDT: due to deleting spike & equilibration data caused by QW sampling.
15 May 2024 at 09:15-10:40 CDT: due to removing sensor from well during a sensor inspection.

Specific Conductance, uS/cm, (15.0 ft. BLS):

Specific conductance was recorded every 5-minutes from 19 Nov. 2021 at 12:45 CST to the present, except during the following periods:

01 Dec. 2021 at 14:05 CST - 03 Dec. 2021 at 01:40 CST: due to deleting spike & equilibration data caused by QW sampling.
16 Dec. 2021 at 10:10-16:10 CST: due to deleting spike & equilibration data caused by QW sampling.
24 Jan. 2022 at 12:50 - 27 Jan. 2022 at 06:35 CST: due to deleting spike caused by moving transducer during a site visit.
14 Feb. 2022 at 13:50-19:15 CST: due to deleting spike & equilibration data caused by QW sampling.
17 Feb. 2022 at 12:20 CST - 18 Feb. 2022 at 15:40 CST: due to removing sensor from well during a sensor inspection.
23 Feb. 2022 at 13:50-16:05 CST: due to spike caused by moving sensor during a WL measurement.
23 Mar. 2022 at 08:50-19:35 CDT: due to spike caused by moving sensor during a WL measurement.
10 May 2022 at 10:55-16:55 CDT: due to spike caused by moving sensor during a WL measurement.
18 May 2022 at 12:30-14:45 CDT: due to removing sensor from well during a sensor inspection.
14 Jun. 2022 at 11:50-14:25 CDT: due to deleting spike & equilibration data caused by QW sampling.
19 Jul. 2022 at 08:55-16:00 CDT: due to deleting spike & equilibration data caused by QW sampling.
09 Aug. 2022 at 13:00-19:45 CDT: due to deleting spike & equilibration data caused by QW sampling.
10 Aug. 2022 at 10:35-20:45 CDT: due to removing sensor from well during a sensor inspection.
06 Sept. 2022 at 11:20-18:35 CDT: due to deleting spike & equilibration data caused by QW sampling.
06 Oct. 2022 at 07:40 CDT - 11 Oct. 2022 at 16:30 CDT: due to deleting spike & equilibration data caused by QW sampling.
15 Nov. 2022 at 11:50 CST - 20 Nov. 2022 at 19:30 CST: due to deleting spike & equilibration data caused by QW sampling.
16 Nov. 2022 at 12:35-14:10 CST: due to removing sensor from well during a sensor inspection.
13 Feb. 2023 at 11:40-12:55 CST: due to removing sensor from well during a sensor inspection.
29 Mar. 2023 at 07:45-21:30 CDT: due to deleting spike & equilibration data caused by QW sampling.
08 May 2023 at 08:05-12:25 CDT: due to deleting spike & equilibration data caused by QW sampling.
09 Aug. 2023 at 22:45 CDT - 10 Aug. 2023 at 11:10 CDT: due to dead station batteries.
10 Aug. 2023 at 18:20 CDT - 11 Aug. 2023 at 13:20 CDT: due to dead station batteries.
11 Aug. 2023 at 17:20 CDT - 16 Aug. 2023 at 13:15 CDT: due to dead station batteries.
14 Sept. 2023 at 08:35 CDT - 15 Sept. 2023 at 02:55 CDT: due to deleting spike & equilibration data caused by QW sampling.
16 Oct. 2023 at 14:50 CDT - 17 Oct. 2023 at 11:10 CDT: due to deleting spike & equilibration data caused by QW sampling.
13 Nov. 2023 at 07:50-12:10 CST: due to deleting spike & equilibration data caused by QW sampling.
13 Nov. 2023 at 17:45 CST - 14 Nov. 2023 at 07:35 CST: due to deleting spike & equilibration data caused by QW sampling.
15 Nov. 2023 at 12:20 CST - 16 Nov. 2023 at 02:25 CST: due to removing sensor from well during a sensor inspection.
11 Dec. 2023 at 08:00 CST - 12 Dec. 2023 at 10:25 CST: due to deleting spike & equilibration data caused by QW sampling.
29 Jan. 2024 at 08:00-09:40 & 13:20-15:20 CST: due to deleting spike & equilibration data caused by QW sampling.
12 Feb. 2024 at 10:00-12:40 CST: due to removing sensor from well during a sensor inspection.
19 Mar. 2024 at 07:55-18:10 CDT: due to deleting spike & equilibration data caused by QW sampling.
17 Apr. 2024 at 07:40-14:05 CDT: due to deleting spike & equilibration data caused by QW sampling.
10 May 2024 at 08:05-13:30 CDT: due to deleting spike & equilibration data caused by QW sampling.
15 May 2024 at 09:15-08:40 CDT: due to removing sensor from well during a sensor inspection.

COOPERATION - This site was operated from 03 September 2021 to the present by the U.S. Geological Survey as a monitoring well for the USGS Twin Cities Army Ammunition Plant (TCAAP) "Site K" study. The USGS Twin Cities Army Ammunition Plant (TCAAP) "Site K" study is a collaborative study between the U.S. Geological Survey and the U.S. Army.

INSTRUMENTATION - Water temperature and specific conductance were measured with an OTT CTD submersible pressure transducer and specific conductance sensor. Water temperature data are accurate to ±0.1°C. Differences in water temperature are also accurate to 0.1°C. Specific conductance data are accurate to ±1.5% of measurement value; (min ±10 uS/cm). Specific conductance differences are accurate to 10 uS/cm.