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Ref. No. [UMCES]CBL 12-005
2
3.1. Test Parameters
Each of the five trials consisted of three sampling periods labeled T-0, T-1 and T-2. Each
sampling period was divided into thirds for more intensive sampling of some parameters, and
labeled, for example, T0-1, T0-2 and T0-3.
Trial
Number
Date
Ave. Back
Pressure (psi)
Ave. Flow
(m
3
/hr)
Est. No. of
Backflushes
BOLL-1
March 16, 2011
30
200
4
BOLL-2
March 17, 2011
30
200
5
BOLL-3
March 24, 2011
30
*200/210
5
BOLL-4
June 1, 2011
25
325
10
BOLL-5
June 2, 2011
24
375
7
* Flow was increased to 210 m
3
/h prior to sample period T-1.
4.0. Trial Results
4.1. Water Quality – Physical Parameters
At the beginning of each trial, temperature, salinity and dissolved oxygen were measured
in the ambient water using an YSI 556 multi-parameter instrument
.
Trial Number
Date
Temp (C°)
Salinity
DO (mg/l)
BOLL-1
March 16, 2011
8.9
6.5
*12.19
BOLL-2
March 17, 2011
8.9
5.2
*11.1
BOLL-3
March 24, 2011
10.7
3.4
11.4
BOLL-4
June 1, 2011
27.7
1.5
6.8
BOLL-5
June 2, 2011
24.6
1.8
3.9
* These two D.O. readings were obtained from the MD DNR data monitoring program
instrument deployed near the Cape Washington at 1 meter in depth.