Laserfiche WebLink
3 <br /> a <br /> Union Ice Company- Weber Street <br /> Phase II- Report of Findings <br /> Page 2 <br /> of <br /> is project were <br /> in <br /> i.' <br /> All soils and ground water samples taken during the caurrotoclols. ,these protocaolsnare <br /> accordance with all county, state and federal samplingpp <br /> listed in Appendix A. Lab work was done by GeoAnalytical Labs of Modesto, <br /> California, a state certified laboratory. <br /> t CONCLUSIONS <br /> Our conclusions regarding contamination to soils and ground water resulting from tite <br /> t release at this site are: <br /> 1. Two (2) sand units are present. Sand 1 is at about a 15 to 35 foot depth. <br /> t Sand 2 is found at a depth of 50 to 58 feet; it's thickness has not been <br /> determined. These sand units are separated by a thick clay unit (Clay B). <br /> ' 2. First ground water is encountered in Sand 1 at depths of 13 to 15 feet. This <br /> aquifer is slightly artesian -Piezometric surface is from two to five feet (2 - <br /> 5') above the top of Sand 1. <br /> 3. Ground water flow direction in the Sand 1 aquifer is approximately south <br /> of <br /> degrees east; gradient is approximately one (1) foot of fall p <br /> er 240 plan distance. <br /> t 4. Piezometric surface in the Sand 2 aquifer is about 16 feet below the <br /> Piezometric surface in the Sand 1 aquifer. <br /> 5. Aquifer properties of tltie Sand 1 -aquifer dlfootary grColeffae'tent ofcross tile <br /> s[orage <br /> transmissibility varies from 158 to 21,534 dp <br /> varies from 4.OXE-4 to 4.1XE-2. This variability results from thickness and <br /> permeability variations in the Sand 1 aquifer. Sand 1 is not a uniform sand; <br /> therefore, its aquifer properties are not uniform. <br /> 6. The remedial excavation constructed in February of 1991, removed most of <br /> the contaminated soils at this site. A small amount of contaminated soil in <br /> the southeast portion was not removed. Additional work will be necessary to <br /> define the remaining contamination. <br /> 7. Evidence of up-gradient ground water contamination was detected in wells <br /> -- — - - 1S; 1D and 6S in theSpringof 1990, These wells have sampled clean since <br /> ` 6 I <br /> t 4 <br /> 'V <br />