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HENRY M. HIRATA <br />DIRECTOR <br />February 27, 1991 <br />Adlikk <br />COUNTY OF SAN JOAQUIN <br />DEPARTMENT MENT ®F PUBLIC WORKS <br />P. O. BOX 1810 — 1810 E. HAZELTON AVENUE <br />STOCKTON, CALIFORNIA 95201 <br />(209) 468-3000 <br />Ed Padilla <br />San Joaquin County <br />Environmental Health Division <br />P.O. Box 2009 <br />Stockton, CA 95202 <br />SUBJECT: NORTH COUNTY SANITARY LANDFILL <br />Dear Mr. Padilla: <br />EUGENE DELUCCHI <br />CHIEF DEPUTY DIRECTOR <br />THOMAS R. FLINN <br />DEPUTY DIRECTOR <br />MANUELLOPEZ <br />DEPUTY DIRECTOR <br />RICHARD C PAYNE <br />t EPUTV DIRECTOR <br />F- <br />2 7 <br />PER IT%SER'—i,S`LTpq <br />Enclosed are two copies of section IV - PRELIMINARY CLOSURE COST <br />ESTIMATES of the Preliminary Closure and Postclosure Plan for the <br />North County Sanitary Landfill. This section has been revised to <br />reflect concerns of the California Integrated Waste Management <br />Board (CIWMB). Items that have been revised are as follows: <br />1. The Labor Cost per hour used for many of the calculations <br />has been updated from $18.50/hr to $23.58/hr. This is the <br />wage determined for a construction specialist in San Joaquin <br />County pursuant to California Labor Code Part 7, Chapter 1, <br />Article 2, Sections 1770, 1773, and 1773.1 (Attachment 1). <br />All calculations using labor cost/hr in the Preliminary <br />Closure Cost Section have been updated to reflect the new <br />labor value. <br />2. The unit cost/cubic yard values for placement and <br />compaction of soil have changed due to the new labor value. <br />Unit cost for placement is now $1.12, and the unit cost for <br />compaction is $1.14. These figures have been inserted in the <br />calculations for final cover costs and cost for filling an <br />excavated module. <br />3. The second paragraph of the Revegetation section (p. 26) <br />has been revised to read: The maximum cost to close would <br />occur when one module is receiving waste and the next fill <br />module has been 1/2 scalped of soil. In this case, the module <br />receiving waste (approximately 20 acres for largest module), <br />and one half of the fill module (10 acres - 30 acres total) <br />would have to be revegetated. The costs per acre for each <br />item of revegetation have now been multiplied by 30 acres to <br />indicate the time when closure would be most costly. <br />