| |
CH Diagnostic & Consulting Service, Inc. has
participated in the EPA proficiency testing (PT) program since 1999. Listed are our 2004 -
2006
recovery efficiency results.
CHD LT2
Approval Letter
| Results
from samples process with the HV Envirochek Capsule (Pall-Gelman) |
| Sample
Date |
Sample
ID |
NTU |
Cryptosporidium |
Giardia |
| oocysts counted |
oocysts spiked |
% recovery |
cysts counted |
cysts spiked |
% recovery |
| 4/21/08 |
1 |
1.34 |
0 |
0.00 |
47 |
95 |
149.78 |
37 |
| 4/21/08 |
2 |
1.29 |
51 |
84.33 |
53 |
0 |
0.00 |
42 |
| 4/21/08 |
3 |
1.33 |
108 |
185.73 |
63 |
100 |
149.78 |
na |
| Mean
Recovery (%) |
59 |
65 |
| RSD
of % Recovery |
3 |
4 |
| No.
of False Positives |
0 |
0 |
| Results
from samples process with the HV Envirochek Capsule (Pall-Gelman) |
| Sample
Date |
Sample
ID |
NTU |
Cryptosporidium |
Giardia |
| oocysts counted |
oocysts spiked |
% recovery |
cysts counted |
cysts spiked |
% recovery |
| 2/11/08 |
1 |
5.8 |
93 |
199.61 |
47 |
37 |
100.0 |
37 |
| 2/11/08 |
2 |
6.4 |
63 |
120.00 |
53 |
42 |
100.0 |
42 |
| 2/11/08 |
3 |
6.8 |
125 |
199.61 |
63 |
0 |
0.00 |
na |
| Mean
Recovery (%) |
54 |
40 |
| RSD
of % Recovery |
15 |
9 |
| No.
of False Positives |
0 |
0 |
| Results
from samples process with the HV Envirochek Capsule (Pall-Gelman) |
| Sample
Date |
Sample
ID |
NTU |
Cryptosporidium |
Giardia |
| oocysts counted |
oocysts spiked |
% recovery |
cysts counted |
cysts spiked |
% recovery |
| 8/27/07 |
1 |
0.87 |
89 |
144.29 |
62 |
46 |
75.82 |
61 |
| 8/27/07 |
2 |
0.67 |
86 |
144.29 |
60 |
0 |
0.00 |
na |
| 8/27/07 |
3 |
0.93 |
86 |
136.00 |
63 |
40 |
75.82 |
53 |
| Mean
Recovery (%) |
62 |
57 |
| RSD
of % Recovery |
3 |
10 |
| No.
of False Positives |
0 |
0 |
| Results
from samples process with the HV Envirochek Capsule (Pall-Gelman) |
| Sample
Date |
Sample
ID |
NTU |
Cryptosporidium |
Giardia |
| oocysts counted |
oocysts spiked |
% recovery |
cysts counted |
cysts spiked |
% recovery |
| 5/21/07 |
1 |
0.02 |
111 |
178.5 |
62 |
157 |
195.4 |
80 |
| 5/21/07 |
2 |
0.03 |
104 |
178.5 |
58 |
143 |
195.4 |
73 |
| 5/21/07 |
3 |
0.01 |
112 |
184.25 |
61 |
0 |
0.00 |
na |
| Mean
Recovery (%) |
60 |
77 |
| RSD
of % Recovery |
3 |
7 |
| No.
of False Positives |
0 |
0 |
| Results
from samples process with the HV Envirochek Capsule (Pall-Gelman) |
| Sample
Date |
Sample
ID |
NTU |
Cryptosporidium |
Giardia |
| oocysts counted |
oocysts spiked |
% recovery |
cysts counted |
cysts spiked |
% recovery |
| 2/26/07 |
1 |
0.05 |
79 |
190.61 |
41 |
78 |
201.08 |
39 |
| 2/26/07 |
2 |
0.07 |
57 |
190.61 |
30 |
54 |
201.08 |
27 |
| 2/26/07 |
3 |
0.06 |
123 |
185.26 |
66 |
0 |
0 |
na |
| Mean
Recovery (%) |
46 |
33 |
| RSD
of % Recovery |
41 |
26 |
| No.
of False Positives |
0 |
0 |
| Results
from samples process with the HV Envirochek Capsule (Pall-Gelman) |
| Sample
Date |
Sample
ID |
NTU |
Cryptosporidium |
Giardia |
| oocysts counted |
oocysts spiked |
% recovery |
cysts counted |
cysts spiked |
% recovery |
| 6/19/06 |
1 |
1.13 |
71 |
189.90 |
37 |
104 |
201.71 |
52 |
| 6/19/06 |
2 |
1.16 |
121 |
189.90 |
64 |
131 |
201.71 |
65 |
| 6/19/06 |
3 |
1.13 |
124 |
169.71 |
73 |
0 |
0 |
na |
| Mean
Recovery (%) |
58 |
58 |
| RSD
of % Recovery |
32 |
16 |
| No.
of False Positives |
0 |
0 |
| Results
from samples process with the HV Envirochek Capsule (Pall-Gelman) |
| Sample
Date |
Sample
ID |
NTU |
Cryptosporidium |
Giardia |
| oocysts counted |
oocysts spiked |
% recovery |
cysts counted |
cysts spiked |
% recovery |
| 3/13/06 |
1 |
7.3 |
76 |
119.30 |
64 |
94 |
150.86 |
62 |
| 3/13/06 |
2 |
6.8 |
74 |
119.30 |
62 |
0 |
0 |
na |
| 3/13/06 |
3 |
7.0 |
79 |
128.61 |
61 |
81 |
150.86 |
64 |
| Mean
Recovery (%) |
62 |
58 |
| RSD
of % Recovery |
2 |
11 |
| No.
of False Positives |
0 |
0 |
| Results
from samples process with the HV Envirochek Capsule (Pall-Gelman) |
| Sample
Date |
Sample
ID |
NTU |
Cryptosporidium |
Giardia |
| oocysts counted |
oocysts spiked |
% recovery |
cysts counted |
cysts spiked |
% recovery |
| 10/3/05 |
1 |
7.8 |
61 |
92 |
66 |
0 |
0 |
na |
| 10/3/05 |
2 |
5.6 |
66 |
74.47 |
89 |
78 |
75.88 |
103 |
| 10/3/05 |
3 |
5.1 |
52 |
74.47 |
70 |
45 |
75.88 |
59 |
| Mean
Recovery (%) |
75 |
81 |
| RSD
of % Recovery |
16 |
38 |
| No.
of False Positives |
0 |
0 |
| Results
from samples process with the HV Envirochek Capsule (Pall-Gelman) |
| Sample
Date |
Sample
ID |
NTU |
Cryptosporidium |
Giardia |
| oocysts counted |
oocysts spiked |
% recovery |
cysts counted |
cysts spiked |
% recovery |
| 6/20/05 |
1 |
7.0 |
18 |
74.84 |
24 |
15 |
100.89 |
15 |
| 6/20/05 |
2 |
7.5 |
16 |
74.84 |
21 |
50 |
91 |
55 |
| 6/20/05 |
3 |
6.6 |
14 |
79.81 |
18 |
33 |
100.89 |
33 |
| Mean
Recovery (%) |
21 |
34 |
| RSD
of % Recovery |
16 |
59 |
| No.
of False Positives |
0 |
0 |
| Results
from samples process with the HV Envirochek Capsule (Pall-Gelman) |
| Sample
Date |
Sample
ID |
NTU |
Cryptosporidium |
Giardia |
| oocysts counted |
oocysts spiked |
% recovery |
cysts counted |
cysts spiked |
% recovery |
| 2/21/05 |
1 |
7.4 |
83 |
119.2 |
70 |
69 |
115.9 |
60 |
| 2/21/05 |
2 |
8.6 |
56 |
119.2 |
47 |
62 |
95.3 |
65 |
| 2/21/05 |
3 |
8.3 |
50 |
84.5 |
59 |
78 |
115.9 |
67 |
| Mean
Recovery (%) |
59 |
64 |
| RSD
of % Recovery |
19 |
6 |
| No.
of False Positives |
0 |
0 |
| Results
from samples process with the HV Envirochek Capsule (Pall-Gelman) |
| Sample
Date |
Sample
ID |
NTU |
Cryptosporidium |
Giardia |
| oocysts counted |
oocysts spiked |
% recovery |
cysts counted |
cysts spiked |
% recovery |
| 10/18/04 |
1 |
7.8 |
52 |
89.5 |
58 |
44 |
75.4 |
58 |
| 10/18/04 |
2 |
6.8 |
44 |
75.1 |
59 |
55 |
75.4 |
73 |
| 10/18/04 |
3 |
5.9 |
72 |
89.5 |
80 |
78 |
120.1 |
65 |
| Mean
Recovery (%) |
66 |
65 |
| RSD
of % Recovery |
19 |
11 |
| No.
of False Positives |
0 |
0 |
| Results
from samples process with the FiltaMax foam filter (Idexx) |
| Sample
Date |
Sample
ID |
NTU |
Cryptosporidium |
Giardia |
| oocysts counted |
oocysts spiked |
% recovery |
cysts counted |
cysts spiked |
% recovery |
| 10/4/04 |
1 |
1.44 |
33 |
74.9 |
44 |
0 |
0 |
na |
| 10/4/04 |
2 |
1.29 |
31 |
74.9 |
41 |
36 |
127 |
28 |
| 10/4/04 |
3 |
1.41 |
53 |
150 |
35 |
21 |
76.1 |
28 |
| Mean
Recovery (%) |
40 |
28 |
| RSD
of % Recovery |
11 |
2 |
| No.
of False Positives |
0 |
0 |
| Results
from samples process with the HV Envirochek Capsule (Pall-Gelman) |
| Sample
Date |
Sample
ID |
NTU |
Cryptosporidium |
Giardia |
| oocysts counted |
oocysts spiked |
% recovery |
cysts counted |
cysts spiked |
% recovery |
| 6/28/04 |
1 |
7.0 |
50 |
101.2 |
49 |
42 |
100.0 |
42 |
| 6/28/04 |
2 |
6.4 |
0 |
0 |
na |
0 |
0 |
na |
| 6/28/04 |
3 |
5.9 |
34 |
85.0 |
40 |
37 |
100.0 |
37 |
| Mean
Recovery (%) |
45 |
40 |
| RSD
of % Recovery |
15 |
9 |
| No.
of False Positives |
0 |
0 |
| Results
from samples process with the FiltaMax foam filter |
| Sample
Date |
Sample
ID |
NTU |
Cryptosporidium |
Giardia |
| oocysts counted |
oocysts spiked |
% recovery |
cysts counted |
cysts spiked |
% recovery |
| 6/14/04 |
1 |
1.33 |
38 |
85.1 |
45 |
23 |
75.3 |
31 |
| 6/14/04 |
2 |
1.03 |
24 |
100.6 |
24 |
46 |
100.8 |
46 |
| 6/14/04 |
3 |
1.43 |
0 |
0 |
na |
0 |
0 |
na |
| Mean
Recovery (%) |
34 |
38 |
| RSD
of % Recovery |
43 |
28 |
| No.
of False Positives |
0 |
0 |
| Results
from samples process with the HV Envirochek Capsule (Pall-Gelman) |
| Sample
Date |
Sample
ID |
NTU |
Cryptosporidium |
Giardia |
| oocysts counted |
oocysts spiked |
% recovery |
cysts counted |
cysts spiked |
% recovery |
| 2/23/04 |
1 |
NR |
0 |
0 |
na |
0 |
0 |
na |
| 2/23/04 |
2 |
NR |
62 |
75.5 |
82 |
0 |
0 |
na |
| 2/23/04 |
3 |
NR |
76 |
99.7 |
76 |
55 |
75.2 |
73 |
| Mean
Recovery (%) |
79 |
73 |
| RSD
of % Recovery |
5 |
na |
| No.
of False Positives |
0 |
0 |
| Results
from samples process with the FiltaMax foam filter |
| Sample
Date |
Sample
ID |
NTU |
Cryptosporidium |
Giardia |
| oocysts counted |
oocysts spiked |
% recovery |
cysts counted |
cysts spiked |
% recovery |
| 2/9/04 |
1 |
0.80 |
0 |
0 |
na |
0 |
0 |
na |
| 2/9/04 |
2 |
0.77 |
47 |
75.0 |
63 |
0 |
0 |
na |
| 2/9/04 |
3 |
NR |
65 |
101.1 |
64 |
51 |
75.8 |
67 |
| Mean
Recovery (%) |
63 |
67 |
| RSD
of % Recovery |
2 |
na |
| No.
of False Positives |
0 |
0 |
|
