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T ,.(.—sem.. a ( ' i Y ✓ -, <br /> Site Background Information West Clay Properties u <br /> e <br /> page 3 of 6 - " <br /> petroleum hydrocarbons i1l,the soil <br /> s of ears that the rna3or portion <br /> California Based on the low to non"andflopr of the excavation,it app ion <br /> samples collected from the sidewalls over-excavat <br /> a the most significantly Impacted soil was removed during les collected during~ <br /> ound water same p ears to be <br /> Based on analytical results of gr acted ground water a pp <br /> ears, <br /> Water Mo nitar�ng - lume, as well as the <br /> quarterly monitoring <br /> and site assessment activities,the most imp Inatlon p <br /> t, ered around EW-I and MSN-14 The ST cluster, is n t w ll defined <br /> cent , <br /> lateral extent east and south of the former <br /> CPT INVESTIGATION <br /> s CPT-OI through CPT-04)and 1 I Individually ' <br /> 2Q04,four CPT so11 boring ( es were advanced at the southern UST <br /> Between O1 and 04'Jun for collection of ground water sarripl <br /> stabllshed,soil boring luster area CPT,soil bonngs were advanced at the nt ry following <br /> ert sat the following <br /> No 3 location awate�samp UST c <br /> les were collected from dedicated boring <br /> locations - groundlin bonngs were advanced near the <br /> ground water sampling ores 2 and 3} to determine the , <br /> • CPT-01, CPT-02 and associated gr , <br /> northern boundary of the former UST bon mpacted gro Fd water CPT-Albs d CPT 02was <br /> ere <br /> n etroleutn hydrocarbon-Impacted <br /> ydrocar 100 feet g� <br /> vertical extent ofp advanced to approximately <br />' co-located borings CPT"Ol `vim - CPT-01 was sampled between 77 and 81 feet bsg <br /> advanCed to approximately 170 feetbsg led between 114 and 11$ <br /> d between 93 5 and 97 5 feet bsg whit s later'CPT-02 was sampled <br /> an <br /> feet bsg and,between 137 and 141 feet g'l�n borings were advanced south-southwesteeurn <br /> round water samp g adient extent of p <br /> • CPT-03 and associated grmlne raxtmately 210 feet bsg <br /> h , former UST No 3 location to CPT 3 was advan, d app <br /> the <br /> acted groundwater 133 and 137 feet bsg <br /> hydrocarbon-Imp 74 and 78 feet bsg' <br /> -CPT-03 was sampled between 50 and 54 feet bsg, <br /> and 176 and Igo feet bsg, V , r s were advanced north of the former <br /> { ground water sampling boring Petroleum <br /> CPT-04 and associated gr to determine the 'vertical extent of p <br /> • ores 2 and 4} <br /> rc UST cluster'excavation (Figd water at the farmer UST cluster area CPT-03 was advance <br /> 1 h drocarbon-Impacted ground, <br /> y , <br /> approximately 175 feet bsg roximately 70 feet east-northeast <br /> to app y <br /> lin boring CHB-01 was advanced ap drocarbon-impacted ground water <br /> • Ground water samp $ etroleum hydrocarbon <br /> between 80 and 94 feet <br /> of CPT-04 to determine th erUST clustervertical area,-CPT-04 was Warnsampled between 78 and $2 <br /> down-gradient <br /> of form CHB-01 r <br /> bsg and 166 and 170 feet bsg,while - soil boring <br /> feet bsg <br /> Advanced GeoEnvironmental,Iries <br /> S 1 <br /> Y � <br />