WORK PLANS - Laserfiche WebLink

Home Browse Search

San Joaquin Local Health District 202/799-5005 . 01 J JUIN 2 0' 198Fj June 17 , 1988 Page 3 ENVIROMENTAL HEALTH FERMIT/SERVICES One soil sample from the bottom of each shallow boring would be collected during drilling. Samples would be collected using the previously mentioned procedures for samples obtained from the deep soil boring. Each sample would be field screened by visual observation with a PID . Three soil samples would be selected (using the previously mentioned field screening techniques) from the deep soil boring and submitted along with the 10 soil samples from the shallow borings for laboratory analysis. The soil samples would be analyzed for fuel hydrocarbon concentrations using U.S . Environ- mental Protection Agency (EPA) Method 5030/8020/8015 . In addition, soil samples would also be analyzed for total lead and ethylene dibromide (EDB) concentrations . The existing groundwater monitoring wells would be monitored and surveyed to an arbitrary datum for elevation control . The survey and monitoring data would be used together to determine water level fluctuations , an estimated groundwater flow direction and the local groundwater gradient . Groundwater samples would also be collected from the three existing monitoring wells . The wells would be purged prior to sampling to assure that the samples contain representative formation water . A pH and conductivity meter would be used to determine the volume of water to be purged from the well prior to sampling. Once a stabilization of pH and conductivity have been reached, the well would be allowed to recharge for a short time before sampling. The groundwater samples would be obtained using an EPA-approved TeflonTM sam ler and placed in 40 milliliter (ml ) glass vials with TeflonT septum caps in a manner such that no air was trapped inside . The samples would be labeled and placed on ice in an insulated cooler along with the appropriate Chain-of- Custody manifest and delivered to an analytical laboratory for analysis. The groundwater samples would be analyzed for fuel hydrocarbon concentrations using modified EPA Method 602 . The samples would also be analyzed for total lead and EDB concen- trations . A Preliminary Report , utilizing data obtained from all work to date, would be compiled in accordance with the guidelines set forth by the CRWQCB-V. Submission of the Preliminary Report would be to both CRWQCB-V and SJLHD.