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ANALYTICAL RESULTS
<br /> Laboratory analytical results from our June 24 and 25, 1991 soil
<br /> sampling program and from our July 17, 1991 groundwater sampling
<br /> program are given in the following sections. All soil and
<br /> groundwater samples were analyzed at Chromalab, Inc., of San Ramon,
<br /> California (State-certification #238 and #655, Federal ID #68-
<br /> 0140157) Copies of the laboratory reports are included in Appendix
<br /> B.
<br /> Analytical Results - Soils
<br /> Each soil sample was analyzed for Total Petroleum Hydrocarbons as
<br /> gasoline (TPHg) (EPA Method 5030/8015) , Total Petroleum
<br /> Hydrocarbons as diesel (TPHd) (EPA Method 3550/8015), Benzene,
<br /> Toluene, Ethylbenzene, and Total Xylenes (BTEX) (EPA Method 8020) ,
<br /> Total Oil and Grease (EPA Method 5520 E&F), Purgeable Halocarbons
<br /> (EPA Method 8010), and Cadmium (EPA Method 7130) , Chromium (EPA
<br /> Method 7190), Lead (EPA Method 7420), Nickel (EPA Method 7590) , and
<br /> Zinc (EPA Method 7950) .
<br /> Analytical results from the June 24 and 25, 1991 soil sampling
<br /> program are shown in Table 1 rTPHg & BTEX), Table 2 (TPHd & O&G),
<br /> and Table 3 (Cd, Cr, Pb, Ni, Zn) . The detection limit for each of
<br /> these parameters is also included in the tables. Since there were
<br /> no Purgeable Halocarbons detected in the soil samples, a table
<br /> showing these parameters has not been included.
<br /> Two soil samples were collected from soil boring MW-1,• one from a
<br /> depth of 5 feet (MW1-51 ) and one from a depth of 9 feet (MW1-9`) .
<br /> Soil sample 14W1-5' did not contain detectable concentrations of
<br /> TPHg, TPHd, BTEX, Oil and Grease, or Purgeable Halocarbons.
<br /> Cadmium, Chromium, Lead, Nickel, and Zinc were present at
<br /> concentrations below their respective Total Threshold Limit
<br /> Concentrations (TTLCs) and below ten times their respective Soluble
<br /> Threshold Concentration Limits (STLCs)5. Chromium was detected at
<br /> a concentration of 4.07 parts per million (ppm), Lead at a
<br /> concentration of 8.83 ppm, Nickel at a concentration of 4.63 ppm,
<br /> and Zinc at a concentration of 8.73 ppm. Cadmium was not detected.
<br /> Soil s.ample`'MW1-9' contained. concentrations of :TPHg and. TPHd Of
<br /> 1100 ppm and 360 "ppm, respectively. Benzene :was detected at a
<br /> concentration: of 180 ':parts`.'per, billion (ppb), Toluene at a
<br /> concentration of`. 170 ppb, .Ethylbenzene at aconcentration of 450
<br /> "ppb,.:..and. Xylenes at .a. concentration of 9000 ppb:::. Oil and Grease
<br /> and Purgeable Halocarbons were not detected in sample MW1-91 .
<br /> Cadmium, Chromium, Lead, Nickel, and Zinc were present at levels
<br /> below their respective TTLCs and below ten times their respective
<br /> STLCs. Cadmium was detected at a concentration of 0.225 ppm,
<br /> Chromium at a concentration of 3.34 ppm, Lead at a concentration of
<br /> 8.35 ppm, Nickel at a concentration of 3.95 ppm, and Zinc at a
<br /> concentration of 7.04 ppm.
<br /> �,'_ 275 GRANT LINE ROAD - _ _ __ PAGE 13 - -
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