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II/L.7I"0 1.7:113 VAA 31,U JJJ U044 Wal MAKI.lRMI, <br /> SMOO � <br /> October 6, 1998 <br /> Mr.H. HnolUSJCPHS <br /> PaP2 <br /> HAM-EMIQu <br /> The formes&cUlty is within.the Central Vallcey Eamn and is less Om 1000 feet fmm the Stockton <br /> Deep W ter C bamnd. Depth to groundwat r is approximately 25-35 feet below ground Surf=. <br /> CU=sks im the am are affected by tidal influences, swing the groundwater grada'ent towards <br /> the east at the funs of monitoring(SICPHS, 1998). <br /> A=nding to Harland 1€na11 of the San Joaquin County public Health Services (SJCPN.S), there <br /> were pfavinu8ly un underground storage tanim that were nmovsd from the site. Three <br /> uuderground sWnp tanks were closed m place beneath the ddewalk. Vapor exMMOn was <br /> candmd at the site. Upon completion of vapor W±Mctian, soma closure was granted(SICPHS, <br /> 1998). <br /> In Map 1997, duxiag a property ftnsf'er site asseasment, four borings were drilled. Soil samples <br /> from two of the borings contained petmleum hydroaubons at 20 and 25 feet. Total petroleum <br /> hyd ora*ong(17H)co=entrolom of 16,200 and 1,160 mg/kg wem detected in sail samples at <br /> 20 feet in Bofutgs PBl and PB2, respectively. The highest concentrations of tohme, <br /> athylbenzwe and total xylenes were detected in Boring PBl at 49.2, 308, and 1,420 mgtkg, <br /> regm ivefy- No groundwater samples wcm collected. Dae to the omens detected ding <br /> the property transfer sit$asmznct, the SJC 7RS determined that fire site required additional <br /> assessment. <br />