Transition Period Data
Mercury Deposition Network
Quality Assurance
Laboratory Duplicates
Sample Site Sampling Dates --Total Hg (ng/L)-- Relative
ID No. Code Start-Finish Rep 1 Rep 2 Mean % Diff.
_____ _______ _____________ ______ ______ ______ ______
MDN-103 STP 030795-031495 10.7 10.79 10.75 0.8
MDN-054 BRR 041895-042595 5.12 5.21 5.17 1.7
MDN-013 BRR 050595-051695 12.97 13.1 13.04 1
MDN-096 BDV 031495-032895 30.83 29.63 30.23 2
MDN-106 MUL 042595-050295 8.49 8.49 8.49 0
MDN-001 LEW 050995-051695 8.07 10.3 9.29 24
MDN-087 STP 050995-051695 16.25 16.41 16.33 1
MDN-016 MUL 052395-053095 7.56 7.96 7.76 5.2
MDN-043 LEW 060695-061395 11.78 12.84 12.31 8.6
MDN-073 LEW 062795-070495 10.19 10.22 10.21 0.3
MDN-081 MUL 070495-071195 26.08 29.54 27.81 12.4
MDN-026 MUL 072595-080195 31.3 31.29 31.3 0
MDN-082 TTL 080195-081095 12.01 12.01 12.01 0
MDN-020 PPR 080895-081595 19.41 19.81 19.61 2
MDN-017 CGS 082295-082995 9.21 8.92 9.07 3.2
MDN-080 MCL 082995-090595 18.48 19.16 18.82 3.6
MDN-064 MCL 090595-091295 0.65 0.66 0.66 1.5
MDN-045 WSP 091995-092695 5.47 6.17 5.82 12
MDN-039 SNF 092695-100395 3.65 3.41 3.53 6.8
MDN-095 WYE 100395-101095 2.24 2.41 2.33 7.3
MDN-065 BDV 101195-102095 16.27 17.05 16.66 4.7
MDN-403 PPR 101795-102495 10.55 11.03 10.79 4.4
MDN-027 MUL 103195-110795 8.75 10.06 9.41 13.9
MDN-070 ANP 120595-121295 1.51 2.21 1.86 37.63
MDN-065 CGS 120696-121396 6.64 6.42 6.53 3.37
MDN-067 EVE 010296-010996 6.21 6.17 6.19 0.65
MDN-048 ANP 011696-012396 3.06 2.69 2.875 12.87
MDN-041 PSP 010496-011196 3.8 3.44 3.62 9.94
MDN-079 MUL 012396-013096 5.45 6.22 5.835 13.2
MDN-035 CGS 020696-021396 14.37 14.55 14.46 1.24
MDN-015 PSP 021596-022296 3.88 4.62 4.25 17.41
MDN-073 STP 022096-022796 8.91 9.88 9.395 10.32
MDN-036 EVE 030596-031296 6.15 7.21 6.68 15.87
MDN-019 EVE 031996-032696 4.13 4.26 4.2 3.1
_____________
Mean 7.12
SD 7.98
N 34
Matrix Spike Recoveries
Date Spike Unspiked Spiked Net Recovery
Level ng/L ng/L ng/L %
4/95 19.96 13.14 34.13 20.99 105.2
4/95 21.09 13.98 34.73 20.75 98.4
4/95 10 4.88 14.68 9.88 98.8
5/95 10 8.26 19.89 11.6 116
5/95 19.94 6.87 26.98 20.11 100.9
5/95 10 8.79 19.29 10.5 105
5/95 20 22.15 41.48 19.33 96.7
6/95 10 7.41 17.79 10.38 103.8
6/95 10 6.7 16.41 9.71 97.1
6/95 10 3.98 13.63 9.65 96.5
7/95 10 9.95 20.56 10.61 106.1
7/95 20 9.25 29.34 20.09 100.45
8/95 20 17.1 37.27 20.17 100.85
8/95 20 29.63 52.28 22.65 113.25
8/95 10 13.83 22.21 8.38 83.8
9/95 20 19.36 37.44 18.08 90.4
9/95 10 8.88 18.9 10.02 100.2
9/95 20 21.29 40.17 18.82 94.4
9/95 10 0.63 9.56 8.93 89.31
10/95 10 7.71 19.14 11.43 114.27
10/95 10 3.46 13.6 10.14 101.4
10/95 10 3.58 14.39 10.81 108.1
10/95 10 3.58 14.46 10.88 108.8
10/95 20 6.83 29.16 22.33 111.65
11/95 10 5.98 17.12 11.14 111.4
12/95 10 9.15 20.4 11.25 112.5
12/95 10 9.93 19.1 9.17 91.7
12/95 10 9.53 21.52 11.99 120
01/96 10 6.21 16.11 9.9 99
01/96 10 4.79 15.86 11.07 110.7
01/96 20 5.22 26.78 21.56 107.8
01/96 10 2.25 11.88 9.63 96.3
02/96 10 3.6 13.6 10 100
02/96 10 14.37 26.46 12.09 120.9
02/96 10 3.88 12.56 8.68 86.8
03/96 5 15.22 19.85 4.63 92.6
03/96 10 7.83 18.13 10.3 103
03/96 10 11.45 21.34 9.89 98.9
_________
Mean 102.45
SD 8.81
N 38
Bottle Acid Blanks
A precharge (20 ml) of 1% HCL is
added to each bottle.
ng/bottle
___________
0.048
0.051
0.04
0.027
0.14
0.092
0.037
0.032
0.067
0.076
0.056
0.033
0.079
0.085
0.035
0.038
0.117
0.087
0.08
0.045
0.06
0.054
0.095
0.017
0.031
__________
Mean 0.061
SD 0.03
N 25
Field Blank
Bottle with precharge exposed in sample bottle position for
one week (no precipitation recorded).
Sample Site Exposure Dates Total Hg
ID No. Code Start-Finish ng/bottle
MDN-095 MCL 030795-031495 0.051
MDN-103 MCL 042595-050295 0.126
MDN-061 SNF 032195-032895 0.05
MDN-022 SNF 042595-050295 0.045
MDN-037 CGS 031495-032195 0.076
MDN-052 CGS 032195-032895 0.056
MDN-081 CGS 032895-040495 0.059
MDN-019 STP 050295-050995 0.051
MDN-101 SNF 053096-060695 0.1
MDN-066 BRR 061395-062095 0.083
MDN-103 MCL 061395-062095 0.203
MDN-071 BVL 061395-062095 0.052
MDN-041 MUL 071195-071895 0.048
MDN-074 SNF 071195-071895 0.06
MDN-029 LEW 081595-082295 0.05
MDN-403 LEW 082295-082995 0.038
MDN-060 PSP 081895-082495 0.048
MDN-086 BDV 082995-090595 0.09
MDN-097 MUL 082995-090595 0.043
MDN-068 PPR 082995-090595 0.062
MDN-108 MUL 101095-101795 0.053
MDN-404 MUL 111495-112195 0.039
MDN-017 BDV 112295-112995 0.083
MDN-051 BRR 113095-120595 0.037
MDN-098 PSP 120195-120795 0.055
MDN-053 BDV 120695-121395 0.139
MDN-036 EVE 010996-011696 0.077
MDN-064 LGV 010996-011696 0.012
MDN-031 LGV 022096-022796 0.029
____________
Mean 0.066
SD 0.037
N 29
System Blank
At the end of a dry week, DIW is poured through
the funnel and Tube into the sample bottle
Sample Site Total Hg
ID No. Code ng/L*
MDN-023 LEW 0.32
MDN-064 MCL 0.65
MDN-085 STP 1.35
MDN-035 TTL 0.55
MDN-036 1.18
MDN-059 0.78
MDN-050 MUL 0.62
MDN-041 PSP 0.49
MDN-079 CGS 1
MDN-030 STP 0.17
_________
Mean = 0.71
SD = 0.35
N = 10
* typical concentrations of Hg in
lab DIW range 0.2 to 0.6 ng/L
Certified Reference Material (NRCC DORM-2)
Date Measured Percent
Value Recovery
ng/g
4/95 4.56 97.6
4/95 4.61 98.8
4/95 4.43 94.9
4/95 4.9 104.9
4/95 4.56 97.7
5/95 4.56 97.7
5/95 4.38 93.8
5/95 4.04 86.4
6/95 4.78 102.3
6/95 4.3 92.1
6/95 4.63 99.1
7/95 4.59 98.3
7/95 5.17 110.7
7/95 4.5 96.3
7/95 4.5 96.3
8/95 4.86 104
8/95 4.39 93.9
8/95 4.84 103.7
8/95 5.17 110.6
8/20 4.48 95.8
9/95 4.57 97.8
9/95 4.77 102.2
9/95 4.65 99.7
9/95 4.18 90.1
9/95 4.46 96.1
10/95 5.04 108.6
10/95 4.85 104.6
10/95 4.59 98.9
10/95 4.43 95.5
10/95 4.56 98.2
10/95 4.81 103.6
10/95 4.73 101.9
11/95 4.42 95.3
11/95 4.77 102.7
12/95 4.59 98.9
01/96 4.31 92.93
01/96 3.98 85.84
02/96 4.35 93.75
02/96 3.95 85.22
02/96 4.42 95.34
02/96 4.7 101.34
02/96 4.59 98.92
03/96 4.93 106.25
03/96 4.81 103.66
03/96 4.45 95.91
_______________
Mean 98.4
SD 5.73
N 45
Certified Value = 4.64 +- 0.260 ng/g
Co-located Samplers
Two samplers located two meters apart. Collected samples
and sample volume are compared.
Sample Site Sample Dates Sampler1 Vol. Sampler2 Vol. % Difference
ID No. Code Start-Finish Total Hg (ml) Total Hg (ml) Total Volume
(ng/L) (ng/L)
002 & 008 STP 100593-101393 17.88 120 17.87 115 0 4.3
001 & 003 STP 101393-101993 13.09 341 12.57 340 4.1 0.3
004 & 005 STP 101993-102693 4.29 125 6.14 148 35 17
010 & 011 STP 102693-110393 5.04 284 5.14 284 2 0
012 & 013 STP 110393-110993 12.78 95 11.29 97 12 2.1
031 & 033 STP 110993-111693 11.96 148 12.95 149 8 0.7
Mean 10.2 4.1
SD 11.8 6
N 6 6
END OF DATABASE
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