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January 31, 2024 <br />Risk-Based Evaluation for Reuse of Stockpile Material for the Proposed Treatment <br />Wetland Project – City of San Leandro Water Pollution Control Plant <br /> <br /> 20240131-Terraphase-SanLeandro-TreatmentWetland-Risk-TM-DRAFT.docx Page 4 of 10 <br /> <br />Table: Chemicals of Potential Concern <br />Group Chemical Stockpile Soil Storage Pond Sludge <br />SVOCs Acenaphthene  <br />Benzo(a)anthracene  <br />Benzo(a)pyrene  <br />Benzo(b)fluoranthene  <br />Chrysene  <br />Dibenz(a,h)anthracene  <br />Fluoranthene  <br />Naphthalene  <br />Phenanthrene  <br />Pyrene  <br />Chlordane (total)  <br />PCBs PCBs (total)  <br />PEST Dieldrin  <br />Endrin  <br />Heptachlor epoxide  <br />METALS Arsenic   <br />Cadmium   <br />Chromium (total)   <br />Chromium VI  <br />Copper   <br />Cyanide (total)  <br />Lead   <br />Mercury   <br />Nickel   <br />Silver   <br />Zinc   <br />Ecological Evaluation <br />The Project site, which includes the 4.3-acre basin and the adjacent upland areas, is vegetated with trees <br />and shrubs along the levee and access road around the basin (LSA 2020b). Due to the disturbed nature <br />of the site and the presence of non-native plant species, it does not provide habitat for special-status <br />plants. <br />Birds such as the California towhee (Melozone crissalis) and northern mockingbird (Mimus polyglottos) <br />have been observed on the Project site, as has the western fence lizard (Sceloporus occidentalis). <br />Burrows and/or tracks observed on the Project site suggest the presence of small mammals, such as the <br />California ground squirrel (Otospermophilus beecheyi), Botta’s pocket gopher (Thomomys bottae), and <br />raccoon (Procyon lotor). <br />Special-status species, such as the white-tailed kite (Elanus leucurus) and Alameda song sparrow <br />(Melospiza melodia pusillula), have been observed on the site and other special-status species, e.g., <br />California Ridgway’s rail (Rallus obsoletus obsoletus), western snowy plover (Charadrius alexandrines