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i <br /> Figure 3 is a 1 "- 20' plan map of the site which shows the <br /> ' location of the adjacent buildings, tank pit , spoils piles, <br /> underground utilities and proposed soil borings. <br /> INVESTIGATION OBJECTIVES AND SCOPE <br /> The purpose of this investigation is to determine the level <br /> and extent of the soil contamination surrounding the tank site <br /> ' and to determine if ground water could have impacted by the <br /> leakage or over fill activity. No remediation or cleanup of <br /> contamination is covered under this plan other than the material <br /> disturbed associated with the sampling process. <br /> CURRENT SITE AND TANK STATUS <br /> ' All three tanks were removed on or about 12-20-91 by <br /> C.C.Wood Co . The tanks were inspected by SJC-EHD and said to be <br /> in poor shape with no holes reported . The site was not sampled on <br /> that day and upon the return of SJC--EHD on 12-27-91 the tank pit <br /> had been filled with water and inoculated with "superbugs" , a <br /> bioremediation bacteria . In addition the spoils had been spread <br /> ' out and were being sprinkled with water containing the bacteria . <br /> Water at this time was standing at about 4 feet from the lip of <br /> the tank pit . Three spoils samples and one tank pit water sample <br /> was collected by SJC-EHD at this time. <br /> i � As the site remains, the pit and spoils pile are open to the <br /> air and enclosed within a six foot cyclone security fence. <br /> 1 PREVIOUS TESTING <br /> The two diesel tanks were pressure tested annually from 1986 <br /> through 1989 and passed within NEPA limits, No record of testing <br /> of the smaller gasoline tank was found . <br /> On 12-27-91 SJC-EHD collected three spoils samples and one <br /> tank pit water sample. <br /> i , The following table shows the results of that sampling in <br /> parts per million (ppm) . <br /> ' TABLE 1 <br /> SAMPLE MATRIX BENZENE TOLUENE XYLENE E'BENZENE TPH LEAD <br /> ' -D TOTAL <br /> S#1 SPOILS ND .07 1 .3 .52 1460 B <br /> S#2 SPOILS ND ND .4 <br /> ND 689 9 <br /> I , S#3 SPOILS ND ND ND ND BRL BRL <br /> W#1 PIT WATER ND ND .63 ND 10,300 BRL <br /> BRL : (BELOW REPORTING LEVEL) <br /> ' Preliminary Organic Vapor Analyzer survey of the pit showed <br /> . values distributed through the pit bottom to 12 ppm (See included <br /> table 2 and field map ) . <br /> I ' 2 <br /> ' T & T EARTH SERVICES <br />