Laserfiche WebLink
' Laboratory analytical results showed detections in the samples taken from the <br /> a northern tank area and the results are as follows Detctions of MTBE were <br /> encountered in four borings in the northern tank area The highest detection of <br /> MTBE was in a shallow groundwater sample taken from GP-3 which contained <br />' levels at 1,700 ppb MTBE Additional detections of MTBE were made in the <br /> shallow groundwater samples taken from borings GP-2, GP-4 and GP-5 Benzene <br /> was encountered at low levels in two of the borings The detections of benzene <br />' were found In the shallow groundwater samples taken from borings GP-4 and GP- <br /> 5 TPH Gasoline, TPH diesel, and all other oxygenate and volatile constituants <br /> were non detect <br /> Laboratory analytical results showed detections in the samples taken from the <br /> southern tank area and the results are as follows Detections of diesel were <br />' encountered In two geoprobe borings which were located in the center of the <br /> former tank pit The detections were in the shallow groundwater in boring GP-9 <br /> and GP-12 The levels were 5,200 ppb and 11,000 ppb, respectively. Detections <br />' of MTBE consist of two detections in the same borings, GP-9 and GP-12 The <br /> highest detection was in boring GP-12 which had levels of 250 ppb Lastly, <br /> volatile gasoline constuants Toluene, Ethyl benzene, and Xylene were encountered <br />' at low levels in boring GP-12 All other water samples were non detect for <br /> oxygenates, and volatile constants No detections of groundwater impact were <br /> made from water samples collected outside the former tank pit in the southern <br /> area <br /> TABLE 11 <br />' SUMMARY OF GROUNDWATER ANALYTICAL RESULTS <br /> TOTAL PETROLEUM HYDROCARBONS AS GASOLINE AND DIESEL <br />' OXYGENATES AND VOCs <br /> IBoring Number Sample EPA Method EPA Method EPA Method 8260 MTBE, EPA Method 8020 BTEX(ug/L) <br /> Depth 8015 Gasoline 8015 Diesel ETSE,TAME,DIPE,TBA, and 8260 VOCs(ugfL) <br /> (Feet) (ug/L) (ug/L) Ethaol,Methinol <br />' <br /> WWI.) <br /> GP-1 Shallow ND ND ND ND <br />' GP-1 Deep ND ND ND ND <br /> GP-2 Shallow ND ND 160 MTBE ND <br /> GP-3 Shallow ND ND 1,700 MTBE ND <br />' GP-4 Shallow ND ND 260 MTBE 16 0 Benzene <br /> Avalon Env,ronmental Consultants Kashmir&Datwidner Dhoot <br /> 20 Corporate Plaza 9627-001-1 <br /> Newport Beach,California 8 156005 Harlan Road <br />