Ref. No. [UMCES] CBL 2013-020
ACT VS12-03
their time-series averages. The EEM
QSE
for the Refined Fuel sensor was 2670 (± 158) cps for
non-detect reference samples and 2779 (± 102) cps for the reported TPH detects respectively
representing a similar absolute increase but larger relative change in EEM
QSE
for this sensor
window. Corresponding instrument response from the Refined Fuel sensor was 19 (± 3). And
24 (± 4) RFU for the non-detect and detect reference samples respectively. Only the referenced
35 ppb detect sample clearly corresponded to an instrument signal (29 RFU) above the
deployment average. These patterns point to the difficulty in the quantitative interpretation of
instrument signal responses in environments with variable ambient fluorescence properties.
35
