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Progress report summarizing the reef fish sampling, PCB - Earthjustice

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The tissue dry weights and percent lipid dry weights were determined following <strong>the</strong><br />

protocols contained in <strong>the</strong> following SOPs used at GERG:<br />

SOP-9415 (instrumental analysis) - Determination of Percent Dry Weight for<br />

Biological Tissues. Revision 1 as of October 1994<br />

SOP-9727 (instrumental analysis)/9807(Extraction purification) - Determination of<br />

Percent Lipids in Biological Tissues. Revision 3 as of June 30, 1998.<br />

Additional GERG SOPS followed included GERG 9709, Procedures for archival and<br />

final disposition of samples.<br />

At <strong>the</strong> conclusion of each Sampling Round analysis a <strong>report</strong> was generated by<br />

GERG in PDF and Excel spread sheet format. These analysis results were <strong>the</strong>n<br />

forwarded to FWC and ECMRD. The <strong>report</strong>s contained <strong>the</strong> following information on<br />

each sample: client sample identification number, corresponding GERG<br />

identification number, sample descriptor (congeners), sample dry weight (grams),<br />

sample wet weight (grams) %solids, %lipids, <strong>PCB</strong> concentration <strong>report</strong>ing units<br />

(picograms/gram (pg/g) parts per trillion), calculation basis (dry/wet-in this case<br />

wet), quality control batch identification number, method (gas chromatograph/mass<br />

spectrometer), sample receipt date, sample analysis date. In addition, a list of<br />

surrogate compounds used and %recovery of each were noted.<br />

<strong>PCB</strong> concentrations were noted in pg/g (picograms per grams, parts per trillion, ppt)<br />

for each <strong>PCB</strong> analyte in all 10 chlorinations. Some <strong>PCB</strong> analyte values were for<br />

combined congeners, for example <strong>PCB</strong> 60/64/69 in Chlorination 4 or <strong>PCB</strong> 89/9-0/101<br />

in Chlorination 5 etc., were shown as a single value for several congeners combined.<br />

Total <strong>PCB</strong> concentrations summing <strong>the</strong> results of all detected <strong>PCB</strong> congener values<br />

were noted for each individual skin-on <strong>fish</strong> tissue fillet sample as well as combined<br />

<strong>PCB</strong> concentrations for each of 10 chlorination homologs.<br />

<strong>PCB</strong> analyte <strong>report</strong>ing limits were indicated as .002 ng/g. based on 10 grams of wet<br />

tissue. Detectable values less than <strong>the</strong> mean detection limit were noted with a “J”<br />

and included in <strong>the</strong> summed total <strong>PCB</strong> concentration calculations for each <strong>fish</strong><br />

sample. Non-detect concentrations noted as “ND” were considered a “0”<br />

concentration value. This was a deviation from our Monitoring Work Plan which<br />

specified Non Detect values in <strong>the</strong> total <strong>PCB</strong> sum per specimen to be included as ½<br />

<strong>the</strong> mean detection limit. Escambia County did not specify in <strong>the</strong>ir contract with<br />

GERG that ½ <strong>the</strong> value of <strong>the</strong> <strong>report</strong>ing limits were to be listed when non-detect<br />

values were noted. The result was that total <strong>PCB</strong> values for each sample were<br />

slightly less than had <strong>the</strong> ½ non detect value been added. However, since all<br />

38 | Page

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