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4634 Soil Characterization Report
<br /> Proposed Women's and Children's Pavilion
<br /> May 27,2005
<br /> Page 2
<br /> stored in a cooler chilled with ice and delivered under chain-of-custody procedures to Argon Laboratories
<br /> (Argon) of Ceres, California.
<br /> 3.0 FIELD RESULTS
<br /> The results of the soil investigation include general field observations of procedures and soil descriptions.
<br /> 3.1 FIELD OBSERVATIONS
<br /> Field observations included direct push boring observations, photoionization detector (PID) screening
<br /> results, sample odors (if any), and visual observations of Site soils. Field observations are documented on
<br /> the geological logs prepared for the borings (Appendix B).
<br /> Soils encountered in borings B 1 through B20 at the first sampling level of four feet bgs were
<br /> predominantly reddish-brown silty clays. In the second sampling level of nine feet, soils generally
<br /> consisted of medium reddish-brown sandy silts with clay. In the third sampling level of 16 feet, soils were
<br /> darker reddish-brown to dark gray clayey-silt. No detectable visual or olfactory indications of
<br /> contamination were noted, and PID measurements of soil samples collected from the borings indicated no
<br /> detectable organic vapors.
<br /> `W 3.2 LABORATORY ANALYSES
<br /> The soil samples collected from the borings were composited by the laboratory at a four-to-one ratio by
<br /> r, equivalent depth and portion of the Site, for a total of 15 composite soil samples. The composite soil
<br /> samples were analyzed for total petroleum hydrocarbons (TPH) quantified as gasoline (TPH-G), diesel
<br /> (TPH-D), motor oil (TPH-M), and kerosene (TPH-K) by EPA Method 8015M; volatile organic
<br /> compounds (VOCs) by EPA Method 826013; organochlorine pesticides (OCPs) by EPA Method 8081A
<br /> and 3550B; polychlorinated biphenyls (PCBs) by EPA Method 8082; CAM 17 metals by EPA Methods
<br /> 601013, 3050B and 7471A; and for asbestos by Polarized Light Microscopy(PLM)methods.
<br /> 4.0 LABORATORY ANALYTICAL RESULTS
<br /> Laboratory analytical results indicated that no petroleum hydrocarbons (TPH-G, TPH-D, TPH-M,
<br /> TPH-K), asbestos, or VOCs were detected in any of the 15 composite soil samples. One OCP, dieldrin,
<br /> was detected at 28 micrograms per kilogram (gg/kg) in composite sample 4634-(9, 10, 11, 12)-4, well
<br /> below the hazardous waste concentration of 8,000 gg/kg defined in Title 22 of the California Code
<br /> Regulations. A summary of VOC, OCP, PCB, asbestos, and TPH results is presented in Table 1 and a
<br /> summary of CAM 17 Metals results are presented in Table 2, below. The metals barium, chromium,
<br /> cobalt, copper, nickel, vanadium, lead, and zinc were detected in all composite soil samples collected
<br /> from the 20 borings. An additional laboratory analysis was performed on sample 4634-(9, 10, 11, 12)-9
<br /> for analysis of hexavalent chromium (chromium VI) due to elevated amounts of total chromium. The
<br /> result of the analysis was below laboratory reporting levels of 0.10 mg/kg for chromium VI. Arsenic was
<br /> detected in ten of the 15 composite samples. Selenium was detected in composite samples 4634-(9, 10,
<br /> 4-. 11, 12)-4 and 4634-(13, 14, 15, 16)-4. Composite sample 4634-(1, 2, 3, 4) had a laboratory analytical
<br /> result of 41 milligrams per kilogram (mg/kg) lead. Copies of laboratory analytical results and chain-of-
<br /> custody records for the samples are included in Appendix C.
<br /> il� CONDOR
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