Laserfiche WebLink
GRANITE CONSTRUCTION 2098357633 06124/02 01:03pm P. 007 <br /> KLEINFELDER <br /> Metal Results <br /> The total metal analyses detected 10 metals including arsenic, barium, chromium, cobalt, copper, <br /> lead, mercury, nickel, vanadium and zinc. Table 1 shows the concentrations of the total metal <br /> results and comparison of regulatory limits and goals. <br /> The concentrations for total metals for each of the ten metals detected did not exceed the Total <br /> Threshold Limit Concentration (TTLC) Regulated Level for classification of the metals as a <br /> hazardous waste per California Code of Regulations 22CCR §66261.24. The concentration of <br /> the ten total metals detected including lead and copper were also found to be below PRGs for <br /> industrial use. <br /> However total lead in both composite samples and copper in one composite sample were found <br /> to exceed 10-times the Soluble Threshold Limit Concentration(STLC)Regulated Level for these <br /> metals as expressed in 22CCR §66261.24. The factor of 10-tines the STLC Regulated Level is <br /> commonly used as an indicator as to whether or not an STLC analysis is appropriate to be ran on <br /> the sample. Therefore these two metals were additionally analyzed for STLC analyses using <br /> distilled water extraction. <br /> The results of the STLC analyses for lead and copper for the two composite samples were none <br /> detected at or above laboratory reporting limits. Therefore the soluble concentrations of lead and <br /> copper, if present below detection limits, are well below the STLC regulated levels for these two <br /> metals and the soil would not be a hazardous waste based on its metals concentrations analyzed <br /> per 22 CCR§66261.24. <br /> Diesel Ranee Hydrocarbons <br /> Diesel range hydrocarbons (TPH-D) were detected at concentrations ranging from 1.7 to 4.3 <br /> mg/kg in the two composite stockpile samples. Based on Kleinfelder's experience this <br /> concentration of TPH-D are relatively low and would not generally trigger requirements for <br /> additional investigation or cleanup from local or state agencies. <br /> 20-1108-33.00112011 R 1188 Page 4 of 7 <br /> 41200 1,Kleinfelder,Inc. October 17,2001 <br />