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SENT BY: MOSAMER & WALL, LLC; 925 820 3184; MAY-16-f)3 1 :14PM; PAGE 6 <br /> 1.3 Scoue Mrk <br /> To address the issues pertinent to the subject site, Basics recommended conducting a <br /> preliminary subsurface assessment within the suhject site to evaluate potential impacts to the <br /> shallow surface below from hazardous materials related to past SM McCaw Company read <br /> construction and paving operations (i.e. petroleum hydrocarbons, its constituents, volatile organic <br /> compounds and heavy metals). <br /> The scope of work performed for this Limited Phase I1 Environmental Site Sarripling <br /> consisted of the following tasks; <br /> • Under the direction of a California Registered Environmental Assessor 11, seven <br /> exploratory borings were to be advanced at the subject site (SB-I and SB-7). These <br /> locations were based upon areas of concern indicated within the Sanborn Fire <br /> insurance Maps of 1350 and 197(1_ <br /> Two borings were to be advanced within the location of the former one:story oil <br /> house and designated gas and oil area(north west portion of the subject site). <br /> One boring was to be advanced within the location of the former private one-story <br /> auto repair shop building (north east portion of the subject site). <br /> One boring was to be advanced within the location of the former one-story truck <br /> repair shop and storage building(south west portion of the subject site). <br /> Three borings were to be advanced within the location of the miscellWleous <br /> buildings and associated aboveground storage tanks (southern porting of the subjvc( <br /> site). <br /> The exact:locations of the above areas of concern could not be pinpointed within the <br /> Sanborn Fire Insurance Maps, therefore, or statistical purposes the borings were to <br /> be evenly spaced out within the subject site. <br /> • A soil sample was to be collected from below the concrete slab surface at <br /> approximately five, tell arrd fifteen feet below ground surface within (tie native soil <br /> within SI3-1 through 513-7. In addition, a grab water sample was to be collected <br /> from the two perceived down gradient and one perceived up gradient bolriggs. If <br /> deemed warranted from visual observations of the Samples, additional soil samples <br /> were to be collected from the exploratory borings; <br /> • The samples were; to be collected, labeled, placed in a cooler with cherirical ice, arkd <br /> transported under Chain cif Custody control to McCampbell Analytical I-aboratoly, <br /> - a certified laboratory with the Department of Toxic Substances Control (DJ"SC) of <br /> the California.t;'nviron mental Protection Agency,for analysis, and <br /> PHASE 1I-01 1 -2 02-ENVO02S <br />