Laserfiche WebLink
r <br /> ENVoZ <br /> AMEHiCA <br /> Mr. Duane White <br /> California Department of Toxic Substances Control <br /> January 11, 2005 <br /> Page 4 of 4 <br /> The estimates are based on labor and material costs typical for similar projects, estimates <br /> obtained from licensed asphalt contractors, state-certified laboratories, and field sampling <br /> contractors. The 30-year O&M cost estimate is for budgetary purposes only. The actual <br /> costs may vary depending on revisions on the groundwater monitoring program, necessary <br /> maintenance for the cap, and labor and equipment available at the time. <br /> Future costs are converted to net present values (NPVs) using a discount rate of 7%. This <br /> discount rate is suggested for non-Federal facility sites according to the following <br /> documents: <br /> • United States (U.S.) Office of Management and Budget (OMB) Circular No. A-94 <br /> • U.S. Environmental Protection Agency (EPA), OSWER Directive No. 9355.3-20, <br /> Revisions to OMB Circular A-94 on Guidelines and Discount Rates for Benefit-Cost <br /> Analysis, 1993. <br /> • U.S. EPA, A Guide to Developing and Documenting Cost Estimates During the <br /> Feasibility Study, July 2000. <br /> The estimated total NPV for 30 years of O&M at the Site is $455,000. <br /> Please call us at 451-989-9933 or Ms. Betsy Brunswick of PG&E at 415-973-1642 if you <br /> need additional information or have questions. <br /> Sincerely, <br /> ENV America Incorporated <br /> Veen Chee Foong, PE Voytek Bajsarowicz <br /> Senior Project Manager Principal <br /> cc: Ms. Betsy Brunswick, PG&E <br /> Mr. Darrell Klingman, PG&E <br /> Mr. Gerald Djuth, CV-RWQCB <br /> Mr. Jeff Wong, San Joaquin County EHD <br /> Attachments: Table 1 — 30-year Cost Estimate: Site Operations and Maintenance <br /> Table 2 — Detail Cost Estimates for Tasks <br /> P:\PG&E\Stockton\Correspondence\OM$est Jan2005 final.doc <br />