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<br /> <br />12 <br />made, at a minimum by mapping all potential cadmium source materials and indicating <br />transport along potential hydrologic flow paths to the monitoring locations with elevated <br />cadmium concentrations. <br />3.5 Laboratory ltirrnaround lame ~ ~N6 w ~ l ~ r~ -~ o f <br />The laboratory turnaround time was excessive for this sampling trip. Core Laboratories <br />received the samples on November 25, 1992, and the thud-party sampler did not receive the <br />final analytical report until January 11, 1993, resulting in a laboratory turn-around time of <br />nearly seven weeks. This lengthy turnaround time makes it impossible to sample on a <br />monthly basis, because the third-party monitor must spend time evaluating the analytical <br />results for preparation of the summary report, and DMG and BMRI must see the report <br />and discuss it before the next round of sampling. Core Laboratories was in the process of <br />moving its laboratory during this period, which included the holidays, and they have <br />promised that turnaround time in the future will be a maximum of four weeks. If Core <br />cannot meet this requirement for the next round of samples, either andther laboratory <br />should be retained or the MOU should be changed to reflect the increased laboratory <br />turnaround time. <br />4.0 RECOMMENDATIONS FOR CHANGES IN THE SAMPLING AND <br />ANALYTICAL PROTOCOL <br />~ • Y~ % Place a filter in the barrel filtration device when collecting the rinse blank <br />T~~ <br />• ~' ~ For 5eld parameters, make sure that readings have stabilized before recording <br />measurements <br />T ~ ~ • r~ ~ All field parameters, including dissolved oxygen and specific conductance <br />should be taken at the process point sampling locations <br />• ~ f ; Check calibration of field instruments after 3-5 samples are collected and after <br />collection of a sample that differs significantly from the following sample <br />'r~~ • ~f s If water from the BMI2I laboratory is used again, the final DI water should <br />/ be used PQ~~~~ <br />~ ~ `~r• yt; The collection of all field data in ink in a field notebook with bound, <br />numbered pages is preferable to the~use of loose field data collection sheets <br />with information written in pencil <br />RCG/Hagler, Badly, Inc <br />