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Environmental Consultants <br />and Contractors <br />September 12, 2008 <br />File No. 01205164.00, Task 8 <br />Mr. Robert McClellon <br />County of San Joaquin <br />Environmental Health Department <br />600 East Main Street <br />Stockton, CA 95202 (559) 230-6000 <br />3843 Brickway Blvd. <br />Suite 208 <br />Santa Rosa, CA 95403 <br />ULA;EC Ez, �,`1U'EIiJI <br />SEP 1 6 2008 <br />707 546E � 4 1 !`d' i`i I tjEALPH <br />FAX 707 rfg4 t nV10LES <br />www.scse r§.}� do?w� <br />SUBJECT: TITLE 27 COMPLIANCE REVIEW, PERIMETER PROBE <br />MONITORING NETWORK, FORWARD LANDFILL <br />Dear Mr. McClellan: <br />SCS Engineers (SCS) has prepared this letter on behalf of the Forward Landfill (Forward), which <br />is owned and operated by Forward, Inc., a wholly-owned subsidiary of Allied Waste Industries <br />(AWI), in regard to a compliance review conducted for the perimeter migration monitoring wells <br />located at Forward, in San Joaquin County, California. This letter addresses any deficiencies in <br />Forward's existing perimeter landfill gas migration monitoring system as they pertain to the <br />revised Title 27, Article 6 regulations. <br />As you are aware, in August 2007, the California Integrated Waste Management Board <br />(CIWMB) made a series of modifications to the gas monitoring and control regulations for open <br />and closed landfills, California Code of regulations (CCR) Sections 20917 through 20939 <br />(Article 6). The compliance review conducted at Forward entailed an evaluation of the <br />construction details of the current perimeter migration monitoring probe network (i.e. location, <br />spacing, total depth, etc.) in comparison to the revised (August 2007) State of California <br />regulations regarding the construction and placement of perimeter probes at landfill sites. <br />FORWARD NETWORK SUMMARY <br />The permitted limit of waste for the Forward Landfill encompasses approximately 355 acres. <br />The current perimeter migration monitoring well network plan for the Site consists of a network <br />of 25 multi -depth wells, located around the permitted limit of waste. Figure 1 shows the location <br />of the perimeter monitoring probes. <br />