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CENTRAL VARY REGIONAL WATER QUAY CONTROL BOARD INSPECTION REPORT 24 January 1992 DISCHARGER: Re-Manufacturing, Ltd. LOCATION & COUNTY: 1825 E. Charter Way CONTACT(S) : Stanley S. Moore INSPECTION DATE: 16 January 1992 INSPECTED BY: Jean McCue ACCOMPANIED BY: --- OBSERVATIONS AND COMMENTS: The purpose of this inspection was to observe the placement of final cover for the landfill cap at the Re-Manufacturing facility. The first layer of filter fabric and gravel for the drainage layer was installed prior to my last inspection on 17 December 1991. When I arrive on 16 January 1992, Nora Kataoka, from Water Work Corp. , was on site to direct the operation. Mr. Moore's crew had already placed the first sheet of filter fabric and started placing soil with a front-end loader. They spread out the soil over the filter fabric with shovels and rakes. Ms. Kataoka said she had checked the gravel layer to confirm a minimum thickness of six inches. In most areas she found it was eight inches to one foot thick. I had spoken to Mr. Moore about appropriate materials for the final cover. Mr. Moore wanted to use soil from his golf course in Stockton (Oakmoore Golf Course) that contained bermuda grass, because he thought it would be good, low maintenance, vegetation. I told him that that would be alright for the top six inches, however, the first six inches should not contain organic material . Mr. Moore stated that he had a source for the "virgin" soil . I noted grass mixed in with the soil that was placed directly over the filter fabric. I asked Ms. Kataoka where the soil had come from. She said it was from a separate area of the golf course where there was no bermuda grass. They were supposed to scrape off the grass before removing the soil , but apparently did not remove it all . A truck was delivering soil and picking up sand blast material to take back to the golf course during my inspection. The sand blast material is likely being illegally disposed and should be further investigated. The filter fabric was rolled out with the sheets overlapping about one foot. The layer of "clean" soil (no bermuda) will be greater than six inches. According to Ms. Kataoka, they will place extra soil to bring the cap up to grade and just put the bermuda soil on top. Therefore, the final cover layer will be greater than the required one-foot minimum. Ms. Kataoka stated that she had researched root depths of bermuda grass and found the roots are generally less than six inches deep and should not go deeper than one foot. The rip rap needs to be extended up the bank of the cap to protect the cover material . Mr. Moore stated that he would bring in more rip rap and place it the following week.