The use of multi-species, multi-life stage tests to evaluate soil toxicity at Camp Pendleton Marine Corps Base, California
- CH2M Hill, Sacramento, CA (United States)
- CH2M Hill, Corvallis, OR (United States)
Soil toxicity testing was conducted at several contaminated sites as a portion of the ecological risk assessment evaluations at Camp Pendleton Marine Corps Base, California. The primary risk assessment concern at these sites was the potential exposure of site invertebrates, plants, and their secondary consumers (birds, mammals) to toxic levels of contaminants. Contaminants included a variety of organochlorine pesticides, PCBs, herbicides, PAHs, arsenic, heavy metals, and petroleum hydrocarbons. Toxicity to earthworms was measured as survival and growth over 28 days. Toxicity to lettuce was assessed as seed germination and 28-day growth of above-ground plant biomass. Test organisms were exposed to a series of concentrations of site soils diluted with clean control soils ranging from 100% to 25% site soil. The tests yielded varying results which indicated a wide range of sensitivities to toxic contaminants among the test species and life stages. In addition, test results indicated a strong and potentially confounding sensitivity of earthworms to soil structure, apparently independent of soil chemistry. However, the combination of multi-species toxicity tests including the assessment of earthworm and lettuce bioaccumulation of selected contaminants provided a ranking of sites by toxicity, estimates of the probable causes of toxicity, and an assessment of the LC{sup 50} and NOEC values for detected soil contaminants at the Sites.
- OSTI ID:
- 367539
- Report Number(s):
- CONF-9511137-; ISBN 1-880611-03-1; TRN: IM9640%%285
- Resource Relation:
- Conference: 2. Society of Environmental Toxicology and Chemistry (SETAC) world conference, Vancouver (Canada), 5-9 Nov 1995; Other Information: PBD: 1995; Related Information: Is Part Of Second SETAC world congress (16. annual meeting): Abstract book. Global environmental protection: Science, politics, and common sense; PB: 378 p.
- Country of Publication:
- United States
- Language:
- English
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