Laserfiche WebLink
ASPECT CONSULTING <br />36 FINAL PROJECT NO. AS190583A-08  MAY 21, 2025 <br />were compared against soil screening levels for both industrial and unrestricted land uses. <br />The results of the Phase 2 ESA are presented in the Data Report for Phase 2 <br />Environmental Site Assessment (Aspect, 2013a). The scope and results of the Phase 2 ESA <br />are summarized briefly below. <br /> Investigated the presence of petroleum hydrocarbons in soil and groundwater within <br />the Standard Oil bulk fuel facilities located beneath and west of the distribution <br />warehouse. Documented TPH concentrations in soil greater than screening levels at <br />several of the locations, and TPH concentrations in groundwater less than screening <br />levels at all locations. <br /> Investigated the extent of petroleum hydrocarbons in soil and groundwater within the <br />Associated Oil ASTs area (REC 2, immediately north of the distribution warehouse). <br />K-C recommended that an IA soil removal be conducted in this area. <br /> Installed one boring to investigate potential impacts to soil and groundwater in the <br />Heavy Duty Shop Sump area (REC 3), where previous soil excavation was conducted <br />to address a discharge of oily water from the sump. The investigation did not identify <br />petroleum hydrocarbon impacts to soil or groundwater. <br /> Identified elevated concentrations of metals (arsenic, copper, lead, mercury, nickel, <br />and zinc) in groundwater downgradient of the Old Boiler/Dutch Ovens (REC 5), and <br />investigated for a potential source of metals in upgradient soils. Metals were not <br />detected at concentrations greater than the screening levels in soil and the source of <br />metals to groundwater at this location was not identified. <br /> Investigated the extent of xylenes in soil and groundwater, associated with a release <br />from xylene UST 29 (HREC 1), and a co-located release of latex product (REC 6). <br />K-C recommended that an IA soil removal be conducted in this area. <br /> Investigated soil and groundwater quality in the vicinity of USTs (No. 68, 68R, 69, <br />70/70R, 71/72/73; HREC 1) removed in the 1980s to1990s, to document current <br />conditions where petroleum hydrocarbon releases were previously reported to have <br />occurred. K-C recommended that an IA soil removal be conducted for the USTs <br />No. 70/70R and USTs No. 71/72/73 areas. <br /> Investigated the nature and extent of TPH in soil and groundwater in the vicinity of the <br />USTs along with metals in shallow soil in the Firing Range area of the Naval Reserve <br />Parcel (HREC 2). <br /> Investigated the quality of fill in the Log Pond Area and groundwater quality at the <br />shoreline immediately downgradient of the Log Pond fill. Hazardous substances were <br />not detected in soil exceeding unrestricted screening levels, and only low-level metals <br />(arsenic, copper, and nickel) and ammonia were detected in groundwater greater than <br />screening levels. <br /> Investigated potential impacts to soil and groundwater associated with the Acid Plant; <br />the results indicated near-neutral pH of both soil and groundwater and no other <br />indication of an acidic release.