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W <br /> # The regulatory standards utilized as evaluation criteria were as <br /> follows: <br /> 4 : <br /> o California Regional Water <br /> g Quality Control Board - Hazardous <br /> and Designated Levels for Wastes and Solids - "Designated <br /> level, total, in a solid to protect groundwater (DL) ." <br /> o California Administrative Code, Title 22, Division 4, Article <br /> II, Sections 66693 - 66700, "Criteria for Identification of <br /> i . <br /> Hazardous and Extremely Hazardous Wastes.,, <br /> o State Water Resources Control Board , Leaking Underground Fuel <br /> F, Tank (LUFT) Manual, March 1989 Edition, Table 2-1, "Leaching <br /> Potential Analysis for Gasoline and Diesel Using Total <br /> Petroleum Hydrocarbons (TPH) and Benzene, Toluene, xylene and <br /> Ethylbenzene (BTX&E) ." <br /> The following sections present a summary of the analytical data for <br /> each sample area along with conclusions relating to the need for <br /> further investigation .,r remediation. <br /> 3.1 Tank Bottom (Pit A) <br /> Pit A is the excavation area from which the three tanks were <br /> removed. It is located adjacent to the east side of the building, <br /> A review of Table I indicates that only one compound analyzed for <br /> i w 4=as detested. This was total lead at a concentration of 7.9 mg/Kg <br /> in the soil sample designated SA. This concentration is well below <br /> the Title 22, Total Threshold Limit Concentration (TTLC) of 1,000 <br /> mg/Kg and the DL concentration of 500 mg/ g� <br /> K Therefore, no <br /> g required additional investigation/remediation ation/remediation is re ires within this area.. <br /> 3.2 Tank Bottom (Pit B) <br /> Pit B is a small excavation area from which <br /> piping was removed <br /> adjacent to the north east corner of the building. This was the <br /> area in which previously mentioned pipeline failure had occurred. <br /> ^ti A review of the data contained in Table 1 indicates a number of <br /> hydrocarbon related compounds were present in the soil samples. <br /> Total lead was detected in samples EB and SB at concentrations of <br /> 5.3 mg/Kg and 5.4 mg/Kg respectively. These values are well below <br /> the applicable regulatory standards noted in Section 3.1. <br /> For samples NB and WB, EDB was detected at concentrations of o.018 <br /> mg/Kg and 0.0011 mg/Kg respectively. These values are below the <br /> DL of 0.05 mg/Kg. <br /> T Also detected in sample NB were three of the BTX&E compounds. <br /> These compounds and their detected concentrations are as follows: <br /> o Toluene - 7.6 mg/Kg <br /> i o. Xylene 32 mg/Kg <br /> a Ethylbenzene - 6.1 mg/Kg <br /> - 3 - <br />