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Mr. James L. Barton <br /> 1 April 2011 <br /> Page 2 <br /> a. Table 2—Groundwater Sample Results <br /> I s Toluene was not detected in any of the six groundwater samples. <br /> ii. Three semi-volatile compounds exceeded the ESLs in one sample. <br /> -iii. TPHg-range hydrocarbons were detected in three of the six groundwater <br /> samples, exceeding the ESL-in two of the samples. <br /> iv. TPHd-range hydrocarbons were detected in only one sample and it was <br /> above the ESL. <br /> b. Table 3 —Soil Sample Results <br /> i. Toluene was detected in only one soil sample (SB-3) at 3 ft, at a <br /> concentration well below (two orders of magnitude below) the ESL. <br /> Toluene was not detected in that same boring at 5 ft or in any of the other <br /> soil samples. <br /> ii. TPHd-range hydrocarbons were detected in the soil samples from one <br /> boring (SB-1); only one sample result exceeded the ESL. <br /> Thank you for the opportunity to clarify the above points.. <br /> Sincerely, <br /> _a ` C14 vi <br /> Lisa Van Tassell,.P. <br /> Engineer <br /> I 6_11 <br /> a C 33274 ck C. Lucia, Ph.D., P.E. <br /> 2012. p' <br /> cipal <br /> •�lj, <br /> r,Aa't�s <br /> Letter to RWQCB I Apr 201 I.doc <br /> yr , <br /> engineers I scientists I innovators <br />