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SECTION 3: ANALYSIS • Sediment results for nonpolar organic chemicals were normalized for total organic carbon (TOC) for use in some of the evaluations conducted as part of the exposure characterization. The normalized value was calculated by dividing the chemical concentration by the fraction TOC (e.g., 2 percent TOC is 0.02 as a fraction) for each sample. These results are included with the other bioassay data transformations on the CD for Appendix D. Chemical data meeting the data evaluation requirements were retained for further evaluation in the ERA. The chemicals detected in each medium are presented in Table 3-1. The analytical data for soil and sediment were also combined as a single exposure medium because both media will become sediment under the post-restoration habitat types for the Lowlands. Chemicals were also combined into “totals” for specific groupings. The totals were calculated from the validated data, using detected values only. Non-detect results were not included in the total. The chemical groupings and chemicals included in each are listed below: • Low MW PAHs — anthracene, acenaphthylene, acenaphthene, phenanthrene, fluorene, naphthalene • High MW PAHs — benzo(a) anthracene, benzo(a) pyrene, benzo(e) pyrene, benzo(b) fluoranthene, benzo(k) fluoranthene, benzo(g, h, i) perylene, chrysene, dibenz(a, h) anthracene, fluoranthene, indeno (1,2,3-cd) pyrene, pyrene • Total PAHs — low MW PAHs and high MW PAHs • Total DDT — 4,4’-DDD; 4,4’-DDE; 4,4’-DDT • Total PCBs — Aroclor 1242, Arochlor 1254, Aroclor 1260 • Total phenols — pentachlorophenol • Total phthalate esters —bis(2-ethyhexyl)pthalate, butyl benzyl phthalate, diethylphthalate, dimethylphtalate, di-n-butyl phthalate, di-n-octylphthalate The data were then summarized by area and are presented in Table 3-2 for sediment/soil, Table 3-3 for surface water, Table 3-4 for terrestrial plant tissue, Table 3-5 for terrestrial invertebrate tissue, Table 3-6 for stilt eggs, Table 3-7 for small mammals, Table 3-8 for aquatic invertebrates, and Table 3-9 for fish. The analyses of tissue data were conducted by taxonomic group and are presented on the accompanying CD. The summary statistics were completed for tissue groups (e.g. all terrestrial plants) because they would be used as a group in estimating exposures. The summaries include number of detects; number of samples; minimum and maximum reported concentrations; mean, median and 95th percent UCL of the mean; and the 90th percentile. The raw data (including grain size) are presented in Appendix D. A brief overview of the data is presented below for each area. Bolsa Bay Several chemical groups including metals, pesticides, PAHs, and semi-volatiles were detected at Bolsa Bay. Metals were found with a high frequency of detection in sediment/soil, and fish tissue. In fish tissue, 7 of 11 chemicals had a detection frequency of 100 percent. Of the 15 detected metals in sediment/soil, 7 had a detect frequency of 100 percent. All detected metals in surface water had a sample size of two. SAC/143368(003.DOC) 3-9 ERA REPORT 7/31/02
SECTION 3: ANALYSIS Pesticides were found in sediment/soil, small mammal tissue, aquatic invertebrate tissue, and fish tissue. Pesticides were detected in sediment/soil with low frequency except for 4’4-DDE, which was detected in 36 of 50 samples. Aquatic invertebrate tissue samples had highest frequencies of detection in the worm and snail samples. 4,4’-DDD and 4,4’-DDE in fish tissue were detected in all 14 samples, while dieldrin had detects in 10 of 14 samples. PAHs were detected in sediment/soil in about half of the samples, and in fish tissue (approximately 25 percent). Semi-volatiles were detected in sediment/soil, small mammal tissue, and fish tissue. Semi-volatiles were detected in sediment/soil about one-half the time. While these chemicals were found in small mammal tissue, the sample size was only one for all semi-volatiles except naphthalene, which had a sample size of two. Detects in fish tissue were infrequent. Full Tidal The Full Tidal area had various chemicals detected including metals, pesticides, PAHs, and semi-volatiles. Metals were found in sediment/soil, surface water, stilt egg tissue, terrestrial plant tissue, small mammal tissue, aquatic invertebrate tissue, and fish tissue. Detection frequency for metals in sediment/soil was very high. Sample sizes ranged up to 382. While metals were detected in almost all surface water samples, the sample size was two. Sample sizes for terrestrial plant tissues was only two and metals were detected in both samples. Metals detected in stilt eggs were numerous and frequent, as were metals in small mammal tissue. Aquatic invertebrate tissue samples had detects in almost all samples. Fish tissue samples had 10 detected metals with 6 of those metals being detected in all samples. Pesticides were detected in sediment/soil but frequency was low. Dieldrin and endrin were detected in one of two surface water samples. Some pesticides detected in stilt eggs such as 4’4-DDE, 4’4-DDT, BHC-beta, dieldrin, and endosulfan II had frequencies of detection above 80 percent. Pesticides were detected in small mammal tissue, although sample sizes did not exceed three. Pesticides detected in aquatic invertebrate tissue samples were infrequent. Fish tissue had infrequent detects of pesticides with the exception of 4’4-DDD, 4’4-DDE, and dieldrin which were detected in 9 of 10 samples. PAHs in sediment/soil were detected in less than 10 percent of samples. PAHs were also detected in small mammal tissue samples although there was only one sample. Detects of PAHs in fish tissue were also noted, most with a frequency of detection of 30 percent. Semi-volatiles were detected in sediment/soil and tissue samples but detection was rare. Future Full Tidal Metals, pesticides, PAHs, and semivolatiles were all detected in the Future Full Tidal area. Metals were detected in sediment/soil at a high frequency. In surface water, several metals were detected; dissolved copper, lead, and zinc were detected in 100 percent of the samples. Terrestrial plant tissue, aquatic invertebrate, fish tissue, and stilt egg samples also had high frequency of metal detects. Pesticides were detected in sediment/soil, surface water, stilt eggs, small mammal tissue, aquatic invertebrate tissue, and fish tissue. Sediment/soil samples had very few detects and large sample sizes, with the exception of 4’4-DDD and 4’4-DDE, which were both detected ERA REPORT 3-10 SAC/143368(003.DOC) 7/31/02
Page 1 and 2: REVISED FINAL VOLUME I Ecological R
Page 3 and 4: CONTENTS 3. Analysis...............
Page 5 and 6: CONTENTS 3-21 Summary of EC 50 s an
Page 7 and 8: Executive Summary The Bolsa Chica L
Page 9 and 10: EXECUTIVE SUMMARY The ERA report ev
Page 11 and 12: EXECUTIVE SUMMARY “focused sampli
Page 13 and 14: EXECUTIVE SUMMARY Exposure point co
Page 15 and 16: EXECUTIVE SUMMARY sample. However,
Page 17 and 18: EXECUTIVE SUMMARY The chemicals in
Page 19 and 20: SECTION 1: INTRODUCTION • Sedimen
Page 21 and 22: SECTION 1: INTRODUCTION Assessment
Page 23 and 24: SECTION 1: INTRODUCTION Based on th
Page 25 and 26: SECTION 1: INTRODUCTION 1.5 Organiz
Page 27 and 28: SECTION 2:PROBLEM FORMULATION The L
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Page 41 and 42: SECTION 2:PROBLEM FORMULATION Benth
Page 43 and 44: SECTION 2:PROBLEM FORMULATION Fish
Page 45 and 46: SECTION 3: ANALYSIS The field sampl
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Page 69 and 70: SECTION 3: ANALYSIS The toxicity bi
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Page 81 and 82: SECTION 3: ANALYSIS dieldrin. These
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CHAPTER 5: SUMMARY, CONCLUSIONS, AN
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SECTION 6 References Abbasi, S. A.
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SECTION 6: REFERENCES Dunteman, G.
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SECTION 6: REFERENCES Kauss, P. B.
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SECTION 6: REFERENCES RareFind. 199
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SECTION 6: REFERENCES U.S. EPA. 199
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SECTION 6: REFERENCES Wentsel, R. S
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