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_ r <br /> Ms. Diane Hinson -2- 17 May 1989 <br /> 11 to 12 feet more water column to pull water from than MW-1 which <br /> results in possible dilution. The clustered wells proposed in the April <br /> 1989 work plan are a good idea.' They may be able to explain the <br /> discrepancies in the data between RW-1 and MW-1 by examining the <br /> vertical distribution of hydrocarbons in ground water beneath the site. <br /> I <br /> 6. Monitor well and monitoring well clusters proposed in the April 1989 <br /> work plan are acceptable to us, but we feel additional monitoring wells i <br /> are needed to redefine .the plume. The "zero line" needs to be <br /> established and proposed work will not do ,it. <br /> 7. Soil samples should be collected in brass cylinders. We do not <br /> recommend collecting samples from the soil cores because of- the <br /> potential for lose of volatiles when the cord is exposed to the <br /> environment. We suggest that 1 .5-foot long split spoon sampler be used <br /> to collect soil samples after each 5-foot section of continuous core has . <br /> been retrieved. <br /> On 11 May 1989 we met with Hal Miller and Walter Lubcke of Southland <br /> Corporation. They said they wish to meet with all of us to discuss this site <br /> as soon as possible. <br /> If you have any questions, please call me at (916) 361-5725. <br /> EDWARD W. JAM I <br /> r Engineering Geologist <br /> I EWJ:ewj <br /> I <br /> i <br />