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r
<br /> y _
<br /> of TPHg, 15 ppb of INTERPRETATION OF DATA ,
<br /> Soil sample SB4-9' contained 3.6 PP66
<br /> m of Oil and Grease.
<br /> !� Ethylbenzene, 35 ppb of Xylenes, and 66 pp
<br /> Benzene, Toluene, and Purgeable Halocarb�o s were
<br /> andtZincewere The following sections summarize the results of the subsurface
<br /> TPHd, Cadmium, Chromium, Lead, investigation and sail and groundwater sampling programs conducted
<br /> in sample SB4-9 respective TTLCs and below ten times during our Phase II Environmental Site Assessment. "Subsurface
<br /> present at levels below their resp m Nickel at a
<br /> their respective STLCs. Chromium was detected at a concentration Materials Encountered" describes the soils encountered during the
<br /> of 3.75 Ppm Lead at c a Zinc atna concentration of 5.68 ppm• bore hole drilling program. The "Soil Investigation" and
<br /> concentration of 2.88 ppm, "Groundwater Investigation" sections describe our estimation as to
<br /> Cadmium was not detected in this sample. the lateral and vertical extent of petroleum hydrocarbon
<br /> contamination at the subject property.
<br /> Anal tical Results - Groundwater
<br /> zed at Chromalab analytical Subsurface Materials Encountered
<br /> Each groundwater sample was
<br /> analyzed
<br /> as gasoline {TPHg)
<br /> laboratory for Total Petroleum Hy Hydrocarbons as diesel From the information contained in the Drilling Logs included in
<br /> Total Petroleum Hy Appendix A, a geologic cross-section has been created that
<br /> (EPA Method 5030/8015) , Benzene, Toluene, Ethylbenzene, and
<br /> TPHd) (EPA Method 3510/8015) , EPA Method illustrates the subsurface conditions present at the site. This
<br /> BTEX) (EPA Method 602}, Total Oil and Grease ( cross-section is shown in Figure 4, Geologic Cross Section.
<br /> Xylenes ( and Cadmium (EPA g
<br /> 5520 E&F) , Purgeable Halocarbons {EPA Methods d}(EPA Method 7420) ,
<br /> Method 7130) , Chromium (EPA Method 7190), Lead 7950? • From surface grade to a depth of approxim ately two feet, a medium
<br /> Nickel (EPA Method 7590}, and Zinc ( brown sandy clay was encountered. From a depth of 2 feet to 9 feet
<br /> roundwater sampling below surface grade, a medium to dark gray, highly plastic, stiff
<br /> for the July 17, 1991 9 TPHd & O&G}, clay was encountered. In boring MW-2, a medium brown, highly
<br /> Analytical results TPHg & BTEX) , Table 5 ( plastic, stiff clay lense was encountered between 5 and 6-1/2 feet
<br /> program are given in Table i4 Zn) . The detection limit for eac,s of
<br /> and Table 6 (Cd, Cr, Pb, n) the tables. Since there were no belo�: surface grade. From a depth of approximately 8-1/2 feet to
<br /> these parameters is included a table 11 feet, a medium brown, moderately plastic, silty clay was
<br /> sable Halocarbons detected in the groundwater samples, encountered, in which the groundwater was first encountered. From
<br /> purg approximately 11 feet to a depth of at least 20 feet, a medium
<br /> far this parameter has not been i;icluded.
<br /> well MW-1•
<br /> gray, highly plastic clay was encountered.
<br /> roundwater. sample WS-1 con
<br /> tbaaand
<br /> Groundwater. :saniple WS-i was collected from monitoring
<br /> Analytical results indicate that g arts.per bi3lion (ppb) Soil Investigation
<br /> TpHg arid'TPHd at concentrations of 150Q.p .
<br /> i b respectively. Toluene was detae�oncentrat�on sof r2 9oppb.
<br /> 380:.AP xylenes were detected a arts per Based on the laboratory analytical results, it appears that there
<br /> 6.d ppb and Xy
<br /> at a and Purgeable Halocarbons are two areas of concern present at the subject property. The most
<br /> Oil and Grease waesnzene ctEahylbenzeneCentration of 0'S P Lead,
<br /> million (ppm) . B Cadmium, Chromium, serious area of risk is present in the northwestern portion of the
<br /> were not detected in this sample. property, in the vicinity of the removed waste oil tank. An area
<br /> el and zinc also were not detected in this groundwater sample, of lesser contamination may be present in the southeastern portion
<br /> Nickel, well MW-2. of the property, in the vicinity of monitoring well MW-3.
<br /> oilresent at a reported Petroleum Hydrocarbons were not detected in the northeastern
<br /> Graundwcalr xesults W ndicaae thate TP s cd £waar, p anitoring
<br /> Analyte resent at a portion of the property, in the vicinity of .monitoring well MW 2.
<br /> 160 Ppb and oil and Grease' was P and
<br /> concentration of 160 TPHg, BTEX, Purgeable Halocarbons,
<br /> concentration of 0.5 PP and zinc were not present above The lateral and vertical extent of soil contamination in the
<br /> Lead, Nickel, northwestern and southeastern portions of the property will be
<br /> Cadmium, Chromiumr addressed in the following sections.
<br /> detection limits in sample WS-2• well MW-3.
<br /> - of TPHg'►
<br /> TpHg; Northwestern Portion of Property
<br /> 'to
<br /> rin
<br /> na g
<br /> o
<br /> collected
<br /> from
<br /> m
<br /> Groundwater sampts.-did n t indicate
<br /> the presence r the five priority
<br /> Analytical -r _ - - --
<br /> . r sable Halocarbons, o
<br /> -STEXr Oil and Grease, purge Analytical results- indicate that petroleum hydrocarbon _
<br /> metals above.detection limits. contamination of the soils is not present at a depth ai' five feet
<br /> in the vicinity of the removed waste oil tank. Samples collected
<br /> from this depth in soil borings SB-1, SB-2, SB-3, SB-4, MW-1 did
<br /> PAGE 16 not contain detectable concentrations of petroleum hydrocarbons.
<br /> 275 GRANT LINE ROAD PAGE 17
<br /> ` 275 GRANT LINE ROAD
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