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a 49~ <br /> l�n <br /> I <br /> 1 <br /> Mr. Harlan Knoll December 2 1991 <br /> PIR Ileinz Facility - Tracy 1 <br /> 2 <br /> Page <br /> The water samples collected from wells MW2 and MW3 were analyzed for benzene, toluene, <br /> ethylbenzene, xylenes (BTEX), by EPA method 8020, total petroleum hydrocarbons as gasoline <br /> (TPHG), and total petroleum hydrocarbons as diesel (TPHD) by modified EPA method 8015. <br /> Dissolved petroleum hydrocarbons were not detected in either MW2 and MW3 Analytical data <br /> is presented on Table 2 The laboratory data sheet, chain-of-custody, and monitoring data are <br /> included as Attachment 1 <br /> Since the area has been newly capped with asphalt and most of the contaminated soil has been <br /> removed, any remaining contaminated vadose soils would not appear to be a significant threat <br /> to groundwater Therefore additional excavation is not warranted, particularly considering the <br /> ` Physis restrictions involved <br /> I RESNA Industries, in conjunction with our client, is currently negotiating with the paving <br /> contractor, Granite Construction, to locate the missing monitoring well, (MWI) <br /> The next monitoring will take place in December of 1991 As you discussed with Steve Jacques <br /> c of our office, you will be notified in advance and another attempt to locate MW1 will be made <br /> RESNA will take depth to water measurements, purge, and collect groundwater samples from <br /> MW2 and MW3, and from MW 1 if it can be successfully located If not, we will again include <br /> gradients from the three previously mentioned sites to verify the local gradient direction A <br /> 1 monitoring report will be submitted when all the sampling analytical results are received <br /> If you have any questions or comments please contact me at our Esc:alon office at 2091838-3507 <br /> i <br /> Sincerely, <br /> RESNA Industries/WaterWork Corp <br /> Lois Frantz <br /> Staff Geologist <br /> Gregory P. 1 <br /> CA Registered Geologist No. 5023 <br /> LF/bja <br /> Attachments <br /> pc: Nick Kosta, BJJ Trucking <br /> RWQCB - Central Valley Region, Jim Maughan <br /> 1.8111591 t P <br /> i <br /> • <br />