Laboratory Analyses. The FBCME shall conduct a postmortem toxicological analysis, if appropriate, and any other tests considered necessary to assist in determining the cause and manner of death and identification.
Laboratory Analyses. 3-8 3.2 Physical Investigation ......................... 3-18 3.2.1 Sampling Procedure ....................... 3-18 3.2.2 Laboratory Analyses ...................... 3-19
Laboratory Analyses. The soil vapor samples were submitted to Sequoia Analytical Laboratory on the day of sample collection. Soil vapor samples were analyzed within 24 hours of receipt. Laboratory reporting sheets of the analytic results are contained in Appendix C. Soil vapor analytic results are summarized in Table 4. It should be noted that all trip blanks contained detectable levels of contaminants. Methylene chloride was detected in trip blanks for sampling performed on April 27, 28, and July 6, 1989. Methylene chloride is a chemical that is widely used in a number of products and applications, is found in ambient air in the Bay Area, and is typically used in analytical laboratories. The trip blanks suggest that methylene chloride concentrations detected in the samples below approximately 50 ppb may be the result of sample or laboratory contamination. The presence of chloroform in one of the trip blanks (April 28, 1989) and of benzene in another trip blank (July 6, 1989) suggested that both chloroform and benzene detected in the samples below approximately 10 ppb may also be the result of contamination. 112 TABLE 4 COMPOUNDS DETECTED IN VAPOR WELLX Well Number Compound Detected Concentration (ppb) ----------- ----------------- ------------------- Samples taken on April 27, 1989
Laboratory Analyses. All soil samples for contaminant analysis were refrigerated by means of an ice chest and transported to the McLaren Environmental Analytical Laboratory within 24 hours. The surface soils were analyzed for metal content (17 CAM/TTLC metals), semi-volatile compounds (EPA Method 8270). and chlorinated pesticides (EPA Method 8080). The subsurface samples were analyzed for metal content (17 CAM/TTLC metals), volatile organic compounds (EPA Method 8240), and semi-volatile compounds (EPA Method 8270). The analysis for volatile organics was not performed on the surface samples since it is unlikely that highly volatile compounds would be detectable in the surface soils. Tables 7, 8, and 9 contain summaries of the analytic results for the surface soils; Tables 9, 10, 11, and 12 contain summaries of the analytic 122 TABLE 7 METALS DETECTED IN 20 COMPOSITED SURFACE SOIL SAMPLES COLLECTED 6/29/89 THROUGH 7/5/89 (17 CAM/TTLC METHOD) METAL* CONCENTRATIONS (ppm)
Laboratory Analyses. The seven surface soil samples were analyzed for water content by Sequoia Analytical Laboratory within one week of submission. The results are contained in Table 13. The twelve subsurface soil samples were analyzed by Soil Mechanics Laboratory within a week of their receipt. Laboratory analyses of the subsurface samples included lithologic descriptions, bulk density determinations, and water content determinations. Bulk density and water content results for the subsurface samples are contained in Table 14. Appendix D contains all laboratory analytic results for soil samples. 133 TABLE 13 SURFACE SOIL MOISTURE ANALYTIC RESULTS APRIL 1989 134 TABLE 14 SUBSURFACE SOIL BULK DENSITY IUD MOISTURE ANALYTIC RESULTS JUNE 1989 Dry Sample Site Sample Depth Bulk Density Water Content Well Number (feet) (g/cm(3)) (percent dry weight) ----------- ------ -------- -------------------- VW-1 1.5 - 2.0 1.09 43.1 VW-1 5.5 - 6.0 1.44 24.5 VW-2 1.5 - 2.0 1.15 46.0 VW-2 4.5 - 5.0 1.41 16.5 VW-3 1.5 - 2.0 1.18 22.7 VW-3 4.5 - 5.0 1.29 30.8 VW-4 1.5 - 2.0 1.36 26.0 VW-4 4.5 - 5.0 1.69 18.4 VW-5 1.5 - 2.0 1.22 40.7 VW-5 4.5 - 5.0 1.22 39.8 VW-6 1.5 - 2.0 1.34 34.3 VW-6 4.5 - 5.0 1.08 39.5 Average: 1.29 31.9 135
Laboratory Analyses. Fifteen groundwater samples collected from 13 monitoring wellx xxxe analyzed for the following: metal content (17 CAM/TTLC metals), chlorinated pesticides (EPA Method 608), semi-volatile organic compounds (EPA Method 625), volatile organic compounds (EPA Method 624), and for cyanide. Repeat sample of well P-1B was analyzed for volatile organic compounds and semi-volatile organic compounds; repeat sample UGP-l was analyzed for volatile organic compounds; and, repeat sample UGP-2 was analyzed for chlorinated pesticides.
Laboratory Analyses. The Medical examiner shall conduct postmortem tests (toxicological analysis), if deemed appropriate, and any other tests considered necessary by the Medical Examiner in order to assist in determining the cause and manner of death.
Laboratory Analyses. Laboratory analyses for this project will meet requirements specified for laboratories in the QA rules (Chapter 62-160, F.A.C.) and the 2003 NELAC standards. The laboratory performing sample analyses for this project is accredited by the Florida DOH Environmental Laboratory Certification Program, according to rule 64E-1, F.A.C., and is certified in the applicable matrices for the analytes and laboratory test methods indicated in this QA plan. The certified test methods used by the laboratory are recognized and approved by DEP, per rule 62-160.320, F.A.C., and are listed in the laboratory’s Quality Manual cited below. *B.10.a List the DOH certification number for all laboratories analyzing samples for the project and indicate the analytes to be tested by each laboratory. (click link to search the certified labs database): xxxxx://xxxxxxxx.xxx.xxxxx.xx.xx/aams/): Click here to enter text. *B.10.b. Are any of the laboratory test methods not recognized and approved by DEP for this project? Click here and select an option from the drop down menu. If yes, list and describe the methods, and attach copies of the methods to this document or list web links here: Click here to enter text. The laboratory quality manual(s) cited below for this project contain(s) information on the following topics: Laboratory MDL and PQL (or other appropriate limits of detection and quantitation) for each laboratory analyte listed for the project. Calibration procedures for all test methods used for this project, including calibration and verification frequencies and calibration verification acceptance criteria for all analytical instrumentation and support equipment. Types and frequency of laboratory QC sample analysis. Procedures, formulas and equations for calculating QC statistics. Acceptance criteria for lab QC sample results. Corrective action procedures for lab calibration and QC failures. Preventive maintenance for equipment & instrumentation.
Laboratory Analyses. Each of the analytical methods adopted by the laboratories should have an established set of quality assurance/quality control (QA/QC) measures that should be followed in order to obtain reliable data that is technically defensible. It is important that laboratories establish and maintain a formal QA program, such as is required under the HOKLAS accreditation program, to increase the quality of the data being generated. If analyses are to be performed by laboratories outside Hong Kong, they should be able to demonstrate competence equivalent to HOKLAS accreditation criteria. Before performing a chemical analysis, the laboratory needs to establish its own limits for performance of a particular method (i.e. method validation, establishing detection limits). This is usually done by analysis of QC samples. Laboratories should establish limits (e.g. control charts) for their own measurement systems, and these limits need to be evaluated to ensure that they meet generally accepted guidelines or that there are acceptable reasons for having a less stringent limit. Also if a laboratory has consistently demonstrated better performance than indicated by general guidelines, then those limits should be used to determine whether a problem is present. Exceedance of warning limits indicates that the QC sample data need some sort of qualification before they can be accepted. These limits serve as a warning that some component of the analytical system may not be performing normally and that data should be qualified as "estimated" before using the results for technical analysis; the standard value for warning limits is ± 2SD. Control limits are limits placed on the acceptability of QC sample data. Exceeding the control limits indicates that the analytical system or instrument is performing abnormally and needs to be corrected. Data that exceed control limits are often rejected and excluded from a project database. The standard value for control limits is ± 3SD. Instrument calibration is always required because it is the means by which instrument responses are properly translated into chemical concentrations (EPA, 1995). Calibration is performed prior to sample analysis and repeated during sample analysis at intervals specific for each method. In addition to performing the instrument calibrations, the acceptability of these calibrations should be evaluated. Information related to the QA/QC measures that accompany each batch of samples should be included in each laboratory rep...
Laboratory Analyses. All laboratory equipment (i.e. glassware, sampling bottles, etc.) used during analytical processing was soaked in distilled water immediately after use until a thorough washing could be performed (Xxxxx, 2004). Washing involved scrubbing equipment for ten seconds with test tube brush, rinsing with steady stream of distilled water for ten seconds followed by three flushing’s with distilled water and an additional ten second rinse with distilled water. If visible scale had formed on laboratory equipment an overnight soak in 5% nitric acid (ACS certified) solution along with the previously outlined washing procedure was performed. In severe cases in which 5% nitric soak would not remove scale, a saturated solution of RoVer® rust remover (i.e. NaHSO3 and Na2S2O4) was prepared and samples were soaked overnight followed by the washing procedure. Upon arrival to the laboratory samples were immediately filtered with 0.45 µm cellulose acetate filter papers (Millpore® HAW) to ensure future analyses would represent dissolved constituents only.
