Committed To Your Success
LABORATORY DATA REPORT
Prepared for:
Talbot River Protection Association
Prepared by:
Severn Trent Laboratories
19 Loveton Circle
Sparks, Maryland 21152
Report 991233
October 1999
TABLE OF CONTENTS
Talbot River Protection Association
Severn Trent Laboratories Report No.991233
1. NARRATIVE
2. CHAIN OF CUSTODY
3. ORGANIC DATA
A. Volatiles
B. Semivolatiles
C. Pesticides/PCB
4.
INORGANIC DATA
A. Metals
1. NARRATIVE
Severn Trent Laboratories
ANALYTICAL NARRATIVE
Client: Talbot River Protection Association ST Laboratories Report: 991233
Site: Talbot River Protection Association Laboratory Project Manager: Joanna K. Mitchell
Project number: 70001.01 Report Date: 11 October 1999
This report contains the results of the analysis of three sediment samples collected on 14 September 1999 in support of the referenced project.
SAMPLE RECEIPT
The samples arrived hand carried at Severn Trent Laboratories on 15 September 1999. Upon receipt, the samples were inspected and compared with the chain-of-custody record. The samples were then logged into the laboratory computer system with assigned laboratory accession numbers and released for analysis.
Client Sample Designation ST Lab Number
TRED AVON 9909846
WATERMELON POINT 9909847
HOG ISLAND 9909848
Following this narrative section is a table of analytical methods (Table 1), a glossary of data qualifiers (Table 2), codes associated with manual integration of chromatographic peaks (Table 3), and the original chain-of-custody record. Analytical results and quality control information are summarized in the appended data package which has been formatted to be consistent with the deliverable requirements of this project.
QUALITY CONTROL
The following sections are ordered as the data appears in this report. They contain observations made during sample analysis, summarize the results of quality control measurements, and address the impact on data usability based upon project Data Quality Objectives. For each fractional analysis the narrative includes:
· Sample chronology: This section summarizes the sample history by fraction including the sample preparation method and date, analytical method, and analysis date. Anything unusual about the samples, digestates, or extracts is identified. Holding time compliance is evaluated in this section.
· Laboratory method performance: All quality control criteria for method performance must be met for all target analytes for data to be reported. These criteria generally apply to instrument tune, calibration, method blanks, and Laboratory Control Samples (LCS). In some instances
Severn Trent Laboratories
ANALYTICAL NARRATIVE
Client: Talbot River Protection Association ST Laboratories Report: 991233
Site: Talbot River Protection Association Laboratory Project Manager: Joanna K. Mitchell
Project number: 70001.01 Report Date: 11 October 1999
where method criteria fail, useable data can be obtained and are reported with client approval. The narrative will then include a thorough discussion of the impact on data quality.
· Sample performance: Quality control field samples are analyzed to determine any measurement bias due to the sample matrix based on evaluation of matrix spikes (MS), matrix spike duplicates (MSD), and laboratory duplicates (D). If acceptance criteria are not met, matrix interferences are confirmed either by reanalysis or by inspection of the LCS results to verify that laboratory method performance is in control. Data are reported with appropriate qualifiers or discussion.
VOLATILES by GC/MS - SEDINIENT (5T9909846 - 5T9909848)
Sample Chronology: Three samples and associated quality control were analyzed on 17 September 1999 for the Target Compound List (TCL) of analytes plus library searches (TICs) by USEPA SW-846, Methods 5030A/8260B. All holding times were met.
Laboratory Method Performance: All laboratory method performance criteria were met for the reported samples.
Sample Performance: All quality control criteria were met for the reported samples with the following exceptions:
the batch MSD, performed on sample HOG ISLAND, had one or more surrogate recoveries above the upper QC limits. These high recoveries appear to be the result of low internal standard areas.
the batch MSD, performed on sample HOG ISLAND, had the recoveries of all matrix spike analytes above the upper QC limits resulting in high RPD values between the MS/MSD recoveries. These high recoveries appear to be the result of low internal standard areas.
the batch MSD, performed on sample HOG ISLAND, had one or more internal standard areas less than 25% of the daily calibration standard. These low internal standard areas may be indicative of a bias for the MSD.
SEMIVOLATILES by GC/MS - SOIL (STL9909846-STL9909848)
Sample Chronology: The samples and associated quality control were extracted on 16 September 1999 by SW-846 Method 3540C. The extracts were analyzed on 29 and 30 September 1999 for the Target Compound List(TCL) of analytes plus library searches by SW-846 Method 8270C. All holding times were met.
Duplicate LCSs were extracted in lieu of an MS/MSD.
Severn Trent Laboratories
ANALYTICAL NARRATIVE
Client: Talbot River Protection Association ST Laboratories Report: 991233
Site: Talbot River Protection Association Laboratory Project Manager: Joanna K. Mitchell
Project number: 70001.01 Report Date: 11 October 1999
Laboratory Method Performance: All laboratory method performance criteria were met for the reported samples.
Sample Performance: All quality control criteria were met for the reported samples.
CHLORINATED PESTICIDES/PCBs by GC - SOIL (STL9909846-STL9909848)
Sample Chronology: The samples and associated QC were extracted on 16 September 1999 by SW846 Method 3540C. The extracts were analyzed on 05 October 1999 for the project list of analytes:
by SW-846 Methods 8081A/8082. All holding times were met.
Laboratory Method Performance: All laboratory method performance criteria were met for TIZ reported samples.
Sample Performance: All quality control criteria were met for the reported samples with the following exception:
Sample TRED AVON had the recovery for the surrogate TCX slightly below the lower QC limit of:
30% at 29%. This recovery may indicate a slight negative bias for some analytes in this sample. All
surrogates were within QC limits for the compliant RTX-35 column analysis for the method blank are
LCSs indicating acceptable method performance.
METALS- SEDIMENT (STL9909846-STL9909848)
Sample Chronology: Three samples were prepared (SW846 methods 3050/7471) on 22 September
1999 - 1 October 1999 and analyzed for TAL metals by SW846 methods 6010/7841/7471 on 22
September 1999 - 7 October 1999.
Laboratory Method Performance: All laboratory method performance criteria were met for the reported samples.
Sample Performance: All quality control criteria were met for the reported samples with the following exceptions:
The recoveries of antimony (27.9%, 33.7%) in the matrix spike and the matrix spike duplicate were below the lower control limit (75%), indicating a potential for bias to the sample data.
CERTIFICATION OF RESULTS
The Laboratory certifies that this report meets the project requirements for analytical data as stated in the Analytical Task Order (ATO) and the chain-of-custody. In addition, the Laboratory certifies that the data
Severn Trent Laboratories
ANALYTICAL NARRATIVE
Client: Talbot River Protection Association ST Laboratories Report: 991233
Site: Talbot River Protection Association Laboratory Project Manager: Joanna K. Mitchell
Project number: 70001.01 Report Date: 11 October 1999
as reported meet the Data Quality Objectives for precision, accuracy, and completeness specified for this project or as stated in Severn Trent Laboratories Quality Assurance program for other than the conditions detailed above. It is recommended by the Laboratory that this analytical report should only be reproduced in its entirety. Severn Trent Laboratories is not responsible for any assumptions of data quality if partial packages are used to interpret data Release of the data contained in this report has been authorized by the appropriate Laboratory Manager as verified by the following signature.
K. Mitchell, Laboratory Project Manager
11 October 1999
TABLE 2. LABORATORY ORGANIC ANALYSIS DATA QUALIFIERS (1)
Qualifiers other than those listed below may be required to properly define the results. If used, they are given an alphabetic designation not already specified in this table or in a project/program document. such as a Quality Assurance Project Plan or a contract Statement of Work. Each additional qualifier is fully described in the Analytical Narrative section of the laboratory report.
U Indicates a target compound was analyzed for but not detected. The sample Reporting Limit (RL) is corrected for dilution and, if a soil sample, for percent moisture, if reported on a dry weight basis.
J - Indicates an estimated value. This qualifier is used under the following circumstances:
1) when estimating a concentration for tentatively identified compounds (TICs) in GC/MS analyses, where a 1:1 response is assumed,
2) when the mass spectral and retention time data indicate the presence of a compound that meets the volatile and semivolatile GC/MS identification criteria, and the result is less than the RL but greater than the method detection (MDL).
B This qualifier is used when the analyte is found in the associated method blank as well as in the sample. It indicates possible/probable blank contamination and warns the data user to take appropriate action. For GC/MS analyses, this qualifier is used for a TIC, as well as, for a positively identified target compound.
E This qualifier identifies compounds whose concentrations exceed the calibration range of the instrument for that specific analysis.
D When applied, this qualifier identifies all compound concentrations reported from a secondary dilution analysis.
A This qualifier indicates that a TIC is a suspected aldol-condensation product.
N Indicates presumptive evidence of a compound. This qualifier is only used for GC/MS TICs, where the identification is based on a mass spectral library search. For generic characterization of a TIC, such as chlorinated hydrocarbon, the N qualifier is not used.
P When applied, this qualifier indicates a reported value from a GC analysis when there is greater than 25% difference for detected concentrations between the two GC columns.
(1) These data qualifiers are added by the laboratory to provide additional information for the reported results.
They should not be confused with the qualifiers applied to the reported data as a result of a data validation process performed independently of the laboratory reporting procedure.
TABLE 3. CODES ASSOCIATED WITH MANUAL INTEGRATION
OF CHROMATOGRAPHIC PEAKS
M1 . . . . . Software failed to integrate peak or integrated peak improperly
M2 . . . . . Multiple peaks within window, analyst's discretion used in peak identification.
M3 . . . . .Close eluting or near-coelution of interferences.
M4 . . . . . Adding or removing area due to peak tailing - subject to consistency within the sequence.
M5 . . . . . Adding/removing area due to positive baseline deflection matrix effect.
M6 . . . . . Adding/removing area due to negative baseline deflection matrix effect
M7 . . . . . Retention time shifts.
M8 . . . . .Skimming vs. dropped baseline.
M9 . . . . . Adding area due to peak splitting.
M10 . . . . Secondary ions or qualifier ions.
Note: Appropriate Qualifiers are used and specified in the data package; either on the individual quantitation reports or in the Technical Review Checklists.
2. CHAIN OF CUSTODY
3. ORGANIC DATA
A. Volatiles
B. Semivolatiles
C. Pesticides/PCB
4. INORGANIC DATA A. Metals
