Laserfiche WebLink
LOCATION OF WELLS WITHIN 2,000 FEET OF PROPERTY: <br /> The attached EXHIBIT A lists wells identified by the California Division of Water Resources <br /> Field investigation reveals that the list is incomplete We have completed a survey of the area to <br /> locate existing wells The results of that survey are shown on PLATE I It shows allof the wells <br /> which were visible from close observation, there may be others which could not be identified <br /> i <br /> PRIOR USE OF UST'S: <br /> Two, 5,000 gallon UST's which had been used for storing diesel fuel were removed from the <br /> f property in March, 1987 There are no records concerning amounts of fuel used during the time <br /> the tanks were in service <br /> SUMMARY OF PRIOR EVENTS: <br /> March, 1987 - Two 5,000 gallon diesel UST's removed from site Some contamination <br /> measured in soil samples taken after tank removal <br /> March, 1988 - Site of removed UST's reentered Soil samples taken at 28' & 29' below grade <br /> Xylene& TVPH measured in both samples Excavation filled with clean soil <br /> April 3, 6, & 7, 1992 - Three (3) groundwater monitoring wells placed on site to depths of 84', <br /> 86', & 89' Refer to WJH report titled "Groundwater Investigation Report" dated May, 1992 <br /> for details of that work <br /> May 30, 1996 - One(1) soil boring was advanced to 80' bgl, it was located in the area which <br /> had been occupied by the diesel UST's Minor amounts of ethylbenzene were measured at 31', <br /> 36',41',& 56' Low levels of xylene was detected at 31' 36' 41', 46' 51' 56',61', & 71' TPH as <br /> gasoline was measured in samples taken from 31'to 71', and at 80' Significant levels of TPH as <br /> diesel were measured in all samples taken TABLE I summarizes the results of that work, and <br /> also MW-1 & MW4 Refer to the Lush Geosiences report titled "Interim Invncticrahn"p amort <br /> Marcy's Diesel Service", dated August 17, 1996 for details <br /> October 10, 1996 - MW-1 was purged and sampled by Del-Tech Geotechnical Support <br /> Services, but the laboratory results were considered inaccurate due to apparent contamination of <br /> sampling equipment <br /> November 27, 1996 - MW-1 was resampled by Del-Tech Laboratory results revealed the <br /> following benzene - ND, toluene - ND, ethylbenzene - 0 4 ug/L, xylene- 0 8 ug/L, and TPHg - <br /> 222 ug/L TEPH was ND, and MTBE was not identified <br /> 2 <br />