SITE INFORMATION AND CORRESPONDENCE

Home Browse Search

California R g onal Water Quality Control Board Central Valley Region il.ry.'F Robert Schneider,Chair Winston H.Hickox Gray Davis Secretaryfor Sacramento Main Office Governor Environmental Internet Address: http://www.swrcb.ca.govimgcb5 Protection 3443 Romier Road,Suite A,Sacramento,California 95827-3003 22 October 2002 Phone(916)255-3000•FAX(916)255-3015 22 E�&VIED OCT 2 3 2002 Mr. Benjamin Hall Mr. Nick Musco ENVIRUIVIVIENT HEALTH Musco Family Olive Company Studley Company PERMIT/SERVICES 17950 Via Nicolo Road 17950 Via Nicolo Tracy, CA 95376 Tracy, CA 95376 CONDITIONAL APPROVAL, WORKPLANMONITORING WELL INSTALLATION, MUSCO FAMILY OLIVE COMPANY, TRACY, SAN JOA Q UIN CO UNTY I have reviewed Kleinfelder's 26 September 2002 Workplan: 84 Million Gallon Storage Pond Monitoring Well Installation report,received at the Regional Board office on 2 October 2002. The workplan describes plans to install three groundwater monitoring wells near the 84 million gallon storage pond (84-Mgal Pond). Kleinfelder has prepared the workplan and requested an expedited review to allow installation of the groundwater monitoring wells prior to wastewater being stored in the pond under construction. I have the following comments on the workplan: • The discussion of previous investigations presented in Sections 2.2 and 2.3 references geotechnical investigation borings; the boring locations are not presented on the workplan figures and the geotechnical report was not submitted to the Regional Board. As a result, much of the information presented in these sections is not useful. • Section 3.2 and Plate No. 3 present the proposed well locations. It is noted that additional wells may be required to adequately monitor groundwater in the area of the 84-Mgal Pond. Specifically, the proposed well located north of the 84-Mgal Pond may be cross-gradient to the pond if shallow groundwater,which mimics surface topography, exists in the area. • Section 3.2 states, "If a local benchmark is not available near the site, the wells will be surveyed relative to an onsite, assumed benchmark with an assigned elevation." The well elevations must be tied to the existing network of wells so that groundwater flow direction can be evaluated. Please address the issue of consistent relative elevations for all groundwater monitoring wells on the site. • The laboratory analysis section does not contain information on the filter pore size or filter methods. Please provide information on the filter equipment, filter pore size, and filter procedures for both the field filtering and the lab filtering. Filtering some of the samples is not appropriate depending on the analyte. See the discussion presented below. You may elect to run duplicate samples (one filtered, one not filtered)to determine the effect of filtering samples if you desire. California Environmental Protection Agency pa Recycled Paper The energy challenge facing California is real. Every Californian needs to take immediate action tp reduce energy consumption. For a list of simple ways you can reduce demand and cut your energy costs,see our Web-site at http:/www.swrcb.ca.gov/mgcb5