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5 - - . y <br /> 1.0 SUrMlAltY <br /> Engineering,*,Inc.(LSI:)was retained by AT&T Communications <br /> Environmental Science& L-n6 b request based on concentrations of Total <br /> (AT&T) to respond to the Sall Joaquin County's req <br /> the <br /> PetY <br /> roleum I-i drocarbons (TP11) reported from a soil sample from der roundrn portion <br /> l stor of <br /> ge <br /> the samples collected during excavation in an area of farmer <br /> tanks. <br /> ork plan based on guidelines by the Regional 'Water Quality Control <br /> ESE prepared a w P roved by San,loaquill County. <br /> Board. 'fire work plan was app <br /> ngs <br /> In <br /> October 29 to 31 ESE drilled and installed the monitoring w,lells d two soil <br /> d e diesel)`and <br /> on site. The wells were analyzed for 'Dotal Extractable <br /> Ground water samples taken <br /> Benzene,Toluene Ethylbellzene,and Total Xylenes( a California Certified <br /> from the developed wells were also analyzed for TEH and BCTX by <br /> Analytical Laboratory- <br /> low concentrations of TEH (1.9 to 3.2 mg/Kg). <br /> Results of soil sample analyses show very le from an obstruction in the <br /> Results for BTEX analyses were nondetectable. KsaH <br /> excavation containing asphalt chips yielded 110 Mg/Kg <br /> Results for ground-water analyses yielded low levels for Toluene(0.5 to 1.4 ug/L) and Total <br /> Xylenes 0.6 ug/L) in well MW-2,cross gradient from the forme ani NiVSlion. Results bailer <br /> for TEH and other BTEX constituents were nondetected�n M All ground water <br /> rinseate sample also yielded a Toluene concentration of 1.2 ug/ <br /> analyses results are <br /> below State of California action levels for toxicity for Toluene (100 <br /> ug/L); and 1750 ug/L for Xylenes. <br /> AT&T-Ladi <br /> Site Asszssmcnt Report <br /> January 1941 <br /> 1 <br />