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05-25-1993 03:10PM FROM URIAH-gladesto Office TO 14641J1JU V.10.5 <br /> as they vary with time, everywhere in the simulated subsurface ' <br /> system. SU'T'RA_ flow simulations may be employed for areal and <br /> cross-sectional nâ–șodeling of saturated groundwater flow systems, <br /> and for cross-sectional modeling of unsaturated zone- flow. <br /> Solute transport simulations using SUVA may be employed to <br /> model natural or man--induced chemical apteies transport inoluftng <br /> processes of solute sorption, production and deoay, and may <br /> be applied to analyze groundwater contaminant transport problems <br /> and aquifer restoration design. Solute transport simulation .. <br /> with SUTRA may be used for modeling of variable density leachatd . <br /> movement. <br /> Mesh construction is quite flexible for arbitrary geometries <br /> employing quadrilateral finite elements in Cartesian or <br /> cylindrical coordinate systems. SUTRA may be employed in one, <br /> or two dimensional analyses. Flow and transport simulation ' <br /> may be .either steady-state. . .which requires only a single <br /> solution strip, or tranal6nt. _ _which requires a series of time. <br /> steps In the num rieal solution. <br /> SUTRA may be relied upon to -provide clear, accurate answers <br /> to wall--posed, well-defined* and well-discretized simulation <br /> problems. in less well efined systems. SUTRA simulation can <br /> help visualize a conceptual model of the floe and transport <br /> regime, can aid in deciding between various conceptual models, <br /> and is useful for hypothesis testing. <br /> SUTRA is cost effective and, by employing a model, one may -avoid ' <br /> the significant problems that would likely be encountered when <br /> attempting to bore or excavate in the public roadways that abut. <br /> the northern and western boundaries of the site (i.c. Grantline <br /> Road and East Roach). <br /> if PHS/EHD finds the course of action proposed acceptable, the ' <br /> Festana Trust has authorized BPM Technologies, - Ina. of Mbdesto <br /> (EPM) to perform the tagks described. EPM is a full service <br /> environmental consulting farm associated with JL- Analytical <br /> Services, Inc. of Modesto, a California-state certified <br /> hazardous waste analytical laboratory. <br /> The feasibility study and modeling will be performed by qualified <br /> professional staff under- the direction of a Registered Civil <br /> Engineer or Registered Geologist. A report of . findings will' <br /> be prepared and a submitted .within 30 days following completion- <br /> of field activities. If the findings confirm that alternative <br /> technologies may be used to remediate the site, 'a formal workplan.. <br /> will be prepared for submission to your office: and the Central <br /> Valley Regional. water Quality Control Board (CVRWQCB) within <br /> 30 days of the client's receipt of your approval to proceed.- <br /> . <br /> 2. <br />