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x '9' �F3hSi4b%°.6:'Ea7nf3F F 1 - J <br /> J4' <br /> 77t30 Moralend Court,9lockton,Col1(ornla <br /> D49ts PMjdtt No.40-88-164 <br /> Page 6 <br /> The chemical analysis from soil samples PL-5 and PL-6 indicated conbentrations of'iTFi were 1*130 <br /> ;x and 117 ppm, respectively. Approximately 50 cubic yards of bakcfill and soil were excavated from <br /> the product line trenches and stockpiled with the soils from the former tank location, <br /> e <br /> b <br /> Four composite soil samples(CSP-3 through CSP-6) were taken from the stockpiled soils and sent <br /> Fi to Eureka Laboratories, Inc., for chemical analysis of 13TEX, TPH, EDB, and organic <br /> sMples were taken to verify the presence or absence of g c load. These <br /> � petroleum constituents in the sails at the <br /> bottom of the new tank excavation and to document the condition of the soils being removed from <br /> the site. A summary of the chemical results as shown in Table 4 with laboratory data sheets <br /> 12 presented in Appendix C. <br /> Three new 12,000-gallon double-walled fiberglass tanks were installed on January 9, 1989, <br /> �f <br /> Sanitarians from the San Joaquin County, Environmental Health Department, were present for the <br /> s new tank installation and pressure testing of the tanks and lines. Tho new tank excavation was <br /> 'z 13 bozkfilled with pea gravel. <br /> =' _� �.LkExciratiarr <br /> } Approximately I50 cubic yards of backfill and soil were excavated from the top of the former tank <br /> location and transported to the Sacramento City Dump for disposal. An additional 150 cubic yards <br /> of soil and backfill were excavated and stockpiled on site. A ' <br /> r p Approximately SO cubic yards of soil and <br /> i backfill were excavated from the product line trenches and were added to <br /> ` the stockpile. <br /> Two composite soil samples (SP-I and SP-2) were obtained from the stockpiled soils on ' <br /> December 28, 1988, and were submitted d to the laboratory for chemical analysis of BTEX, EDB, <br /> organo lead,and TPH. The concentrations of petroleum constituents ranged from nondetectable to <br /> 0.396 <br /> parts per million(ppm)xylenes. A summary of the chemical results are shown in Table 4 with <br /> laboratory data sheets presented in Appendix C. <br /> Six composite soil samples were collected from the stockpiled soils on January 27, 1989, by ETS . <br /> Environmental(ETS). The samples-were_submitted to thelaboratoryfor chemical analysis of BTEX <br /> -- --- <br /> `t and TPH. The soil samples were identified as 012789-I through 012789-6. The chemical analysis ^ <br /> fk detected the presence oftoluene and xylenes at concentrations ranging between 0.001 and 0.022 ppm <br /> A and concentrations of TPH from less than 10.0 to 31.0 ppm. A summary of <br /> s are shown in Table 5 with laboratory data sheets presented in Appendix C. <br /> chemical results <br /> ' G . ` <br />