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1 <br /> IMNiIGEA$ pESC'iYEA5iC0u5NLT/!!IS w <br /> TABLE 2 <br />' Summary of Groundwater Analytical Results <br /> August 1994 through September 1995 <br /> O <br />' Benzene Toluene ;Ethylbenzene Xylene TPH-D <br /> Well Number Sample Date µg/L µg/Lg/L µg/L µg/L <br /> MW-1 August 1994 NDS,m NDa U) Da 0) NDO-O) ND(49) <br /> March 1995 ND(O 5) ND(,,,) NDro 51 NDro s) ND« <br /> June 1995 NDro 5) NDro NDro 5) NDro 5) 76 <br />' September 1995 ND(05) ND(U 5) ND(05) NDro 5> 62 <br /> MW-2 August 1994 NDO-M NDS,-0J NDO-O) NDS,01 NDc s) <br />' March 1995 NDro 51 ND(O 5) NDro s) ND(Os) ND(50) <br /> June 1995 NDro 5) NDro, ND(05) NDro 5) NDp,) <br /> September 1995 ND(o5) ND(O 5) NDro 51 NDro, ND« <br />' MW-3 August 1994 NDO ro NDO-O) NDS,U) NDp U) ND(49) <br /> March 1995 NDro ND(,_,) ND(O5) ND(05) ND(50) <br /> June 1995 ND(05) NDro s) ND(05) ND(,5) 690 <br /> September 1995 1.2 NDro SJ ND(O 5) NDro J) 61 <br /> MW-4 March 1995 NDro 3) NDro 5) ND(O 5) ND(os) ND(5D) <br /> (Duplicate of June 1995 NDro 5) NDro 5) ND(05) NDro 5) 660 <br /> MW-3) September 1995 ND(O 5) NDro n ND(O5) NDro 5) 59 <br /> ND - Not detected above laboratory quantification limit indicated in parenthesis <br /> 1 <br /> As shown in the table, toluene, ethylbenzene and xylenes were not detected at concentrations <br />' exceeding the detection limit of 0.5 µg/L in all wells TPH-D was detected in two of three wells <br /> at the site, MW-1 at 62 µg/l and MW-3 at 61 µg11 The concentration of TPH-D in the MW-4 <br /> sample, a blind duplicate of MW-3, was within 5 percent of the concentration of TPH-D <br /> detected in the MW-3 sample <br /> Benzene was detected in the sample collected monitor well MW-3 at 1.2 1Ag11. However, <br /> benzene was not detected in the duplicate of this sample (MW-4). <br />' 4.0 SUMMARY AND RECOMMENDATIONS <br /> The following is a summary of the results of the Second Quarter 1995 groundwater sampling <br />' event at 7759 South Airport Way, Stockton <br /> • Groundwater flow in the vicinity of the former USTs is towards the north <br /> • This is the second consecutive quarterly sampling event at the site In which TPH- <br /> D constituents were detected in samples collected from wells MW-1 and MW-3. <br /> The concentration of TPH-D detected in MW-1 was similar to the concentration <br />' L 1PROJECrMSMJOQSTMAD-3RD QTR 6 2D Oddber 1995 <br />