2019 MDH Radiochemical Monitoring Reportfil%l 11111�
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�.REC E U V 4r D
SEP „„y 02019
September 24, 2019
Shorewood City Council
c/o City Clerk
Shorewood City Hall
5755 Country Club Road
Shorewood, Minnesota 55331 -8927
Dear Council Members:
SUBJECT: Quarterly Results for Radiochemical Monitoring, Shorewood, Hennepin County,
PWSID 1270051
Enclosed are the results of the most recent radiochemical samples collected from your public water
system in accordance with Minnesota Rules, Chapter 4720 and the Safe Drinking Water Act.
Quarterly monitoring for radiochemicals is being conducted on your water system to determine if your
system meets the maximum contaminant level (MCL) for gross alpha and combined radium 226 +228.
Samples will be collected quarterly and the test results will be averaged. If the annual average of
results from the CD 1 (Amesbury #1 & #6) entry point exceeds the MCL for either of these
contaminants, you will be required to notify the public that the MCL was exceeded and take corrective
action. The following is a summary of the results:
Sampling Site: CD 1 (Amesbury #1 & #6)
Contaminant: Combined Radium ( -226 & -228)
MCL: Annual Average >5.4 pCi /L
Date Collected Results
05/1012019
6.60
03128/2019
4.60
10/30/2018
4.10
06/05/2018
5.20
Units
Sam le#
pCi /L
19EO825 -01
pCi /L
19C1246 -01
pCi /L
18J1522 -01
pCi /L
18F0440 -02
Contaminant: Gross Alpha in Water
MCL: Annual Average >15.4 pCi /L
Date Collected
Results
Units
Sample#
05/10/2019
5.90
pCi /L
19E0825 -01
03%28/2019
7.10
pCi /L
19C1246 -01
10/30/2018
5.90
pCi /L
18J1522 -01
06/05/2018
5.20
pCi /L
1850440 -02
A yr r ,pa ^rY a por°PunE
e pN e rinp ^pov rr
Annual Average.
5.1
4.6
4.7
5.2
Annual Average
6.3
7.1
7.2
5.2
Shorewood City Council
Page 2
September 24, 2019
PWSID 1270051
All required radiochemical samples will be collected and analyzed by the Minnesota Department of
Health. We will notify you if any action is required by your system.
Gross alpha and radium 226 +228 are naturally occurring contaminants that are found in groundwater
throughout central and southern Minnesota. Long -term elevated levels of exposure to these
contaminants may result in an increased risk of cancer.
This report should be placed in your records and a copy maintained on or near the water system
premises and available for public inspection for not less than ten (10) years. If you have any
questions, contact Cindy Swanson at 651/201 -4656 or email cind .swanson state.mn.us.
Sincerely,
Karla R. Peterson, P.E., Supervisor
Community Public Water Supply Unit
Environmental Health Division
P.O. Box 64975
St. Paul, Minnesota 55164 -0975
KRP: BS
Enclosure
cc: Water Superintendent
Brian A. Noma, MDH St. Paul District Office
Final Report
HIALTH
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PWSID:
1270051 Program Code: HC
System Name:
Shorewood
City:
Shorewood
Date Received:
05/10/19 14:37 Collector Name: Brian A. Noma
Rep. Temp. ( °C):
11.3 Collector ID: 8091
MDH Sample Number: 19E0825 -01
Minnesota Department of Health
Public Health Laboratory
Environmental Laboratory Section
601 Robert St. N., P.O. Box 64899
St. Paul, MN 55164 -0899
651- 201 -5300
Type: B
Location ID: E02 Collect Date: 05110/19 Field Residual Chlorine Result: None
Sampling Point: CD 1 (Amesbury #1 & #6) Collect Time: 13:25 Field Fluoride Result: None
Field Number: BN1364 Matrix: Drinking Water Field pH Result: None
Field PO4 Result: None
Results were produced by the Minnesota Department of Health, except where noted.
Radiochemical Parameters
Analyte
Result
Reporting
Limit
Counting
Uncertaint,
Units
Batch
Prepared
Analyzed
Init.
Method Qualifiers
Gross Alpha
5.9
3.0
2.7486
pCi /L
B9F0024
06/03/19 15:30
06/20/19 00:00
JJF
EPA 900.0
Radium -226
2.6
1.0
0.3909
pCi /L
B9F0387
06/18/19 13:24
07/18/19 00:00
SAP
EPA
903.01904.0
Radium -228
4.0
1.0
1.3286
pCi /L
B9F0387
06/18/1913:24
0612511916:18
SAP
EPA
903.01904.0
FINAL REPORT
Authorized by:
Paul Moyer, Environmental Laboratory Manager
Public Health Laboratory, Minnesota Department of Health
ID:07222019142630
Generated: 7/22/2019 2:26:27PM
The results in this report apply only to the samples analyzed.
This report must not be reproduced, except in full, without the written approval of the laboratory.
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Results were produced by Minnesota Department of Health, except where noted.
�... ...... .._... ��_. .......... ..................... __.......... .. __ .... .
Batch B9F0024 - Radiochemistry Alpha /Beta Prep
Blank (B9F0024 -BLK1) Prepared: 06103119 15:30 Analyzed: 06/20119 00:00
Reporting Spike Source RPD
Analyte Result Limit Units Level Result %REC %REC Limits RPD Limit Init. Qualifiers
Gross Alpha �._. < 3.0 pCi /L JJF _
LCS (B9F0024 -BS1) Prepared: 06/03/19 15:30 Analyzed: 06/20/19 00:00
Reporting Spike Source RPD
Analyte Result Limit Units Level Result %REC %REC Limits RPD Limit Init. Qualifiers
Gross Alpha 44.4 3.0 pCI /L 52.86 84 80 -120 JJF
Duplicate (B9F0024 -DUP1) Source: 19E0651 -02 Prepared: 06103/19 15:30 Analyzed: 06/20/19 00:00
Reporting Spike Source RPD
Analyte Result Limit Units Level Result %REC %REC Limits RPD Limit Init. Qualifiers
Gross Alpha 2.0 3.0 pCi /L < 10 20 JJF
Matrix Spike (B9F0024 -MS1) Source: 19E0651 -01 Prepared: 06/03119 15:30 Analyzed: 06/20/19 00:00
Reporting Spike Source RPD
Analyte Result Limit Units Level Result %REC %REC Limits RPD Limit Init. Qualifiers
Gross Alpha 45.8 3.0 pCi /L 52.86 3.8 80 70 -130 JJF
Matrix Spike Dup (B9F0024 -MSD1) Source: 19EO651 -01 Prepared: 06/03/19 15:30 Analyzed: 06120/19 00:00
Reporting Spike Source RPD
Analyte Result Limit Units Level Result %REC %REC Limits RPD Limit Init. Qualifiers
Gross Alpha 47.4 3.0 pCill- 52.86 3.8 83 70 -130 3 20 JJF
Batch B9F0387 - Radiochemistry Ra -226 Ra -228 Prep
Blank (B9F0387 -BLK1) Prepared: 06118/19 13:24 Analyzed: 07/18/19 00:00
Reporting Spike Source RPD
Analyte Result Limit Units Level Result %REC %REC Limits RPD Limit Init. Qualifiers
Radium -226 < 1.0 pCi /L SAP
Radium -228 < 1.0 pCi /L SAP
FINAL REPORT
Authorized by:
.
Paul Mo e Env _ .�.._
Moyer, Environmental Laboratory Manager
Public Health Laboratory, Minnesota Department of Health
ID:07222019142630
Generated: 7/2212019 2:26:27PM
The results in this report apply only to the samples analyzed.
This report must not be reproduced, except in full, without the written approval of the laboratory.
2of3
Minnesota Department of
Final Report Public Health Laborato—ry
Environmental .••o Section
601 Robert St. N., P.O. Box 64899
D HEALTH St. Paul, MN • 1:••
651-201-530T
PWSID: 1270051
Results were produced by Minnesota Department of Health, except where noted.
Batch B9F0387 - Radiochemistry Ra -226 Ra -228 Prep
LCS (69F0387 -6S1) Prepared: 0 611 8/1 9 13:24 Analyzed: 07/18/19 00:00
Reporting Spike Source RPD
Analyte Result Limit Units Level Result %REC %REC Limits RPD Limit Init. Qualifiers
Radium -226 9.9 1.0 pCi /L 10.3 96 90 -110 SAP
Radium -228 18.8 1.0 pCill- 80 -120 SAP
LCS Dup (69F0387 -13SD1) Prepared: 06/18/19 13:24 Analyzed: 07/18/19 00:00
Reporting Spike Source RPD
Analyte Result Limit Units Level Result %REC %REC Limits RPD Limit Init. Qualifiers
Radium -226 10.7 1.0 pCi /L 10.3 104 90 -110 7 20 SAP
Radium -228 18.1 1.0 pCi /L 80 -120 4 20 SAP
Duplicate (B9F0387 -DUPi)
Source: 19E0880 -01`
Prepared: 06/18/19 13:24 Analyzed: 07/18/19 00:00
Reporting
Spike Source RPD
Analyte
Result Limit
Units
Level Result %REC %REC Limits RPD Limit Init. Qualifiers
Radium -226
2.3 1.0
pCi /L
2.5 9 20 SAP
Radium -228
1.8 1.0
pCi /L
1.3 33 20 SAP WB
Matrix Spike (69170387 -MS7) Source: 19EO884 -01 Prepared: 06 /18/19 13:24 Analyzed: 07118/19 00:00
Reporting Spike Source RPD
Analyte Result Limit Units Level Result %REC %REC Limits RPD Limit Init. Qualifiers
Radium -226 13.2 1.0 pCi /L 10.3 1.8 110 80 -120 SAP
Radium -228 23.0 1.0 pCi /L 1.4 70 -130 SAP
Data Qualifiers and Definitions
WB Relative percent d'rfference exceeded the laboratory acceptance limit. Result less than 5 times the RL.
Work Order Comments
Samples were received in proper condition.
FINAL REPORT
Authorized by:
Paul Moyer, Environmental Laboratory Manager
Public Health Laboratory, Minnesota Department of I lealth
113:07222019142630
Generated: 712212019 2:26:27PM
The results in this report apply only to the samples analyzed.
This report must not be reproduced, except in full, without the written approval of the laboratory.
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