SU0002206 - Laserfiche WebLink

Home Browse Search

California Regional Water Quality t'ontrol Board V Central Valley Region y Steven T.Butter,Chair Winston H.Hickos Cray Davis Set rerar7-for Sacramento Main office Commor Environmental Internet Address: htip://w w.s%mb.co.gov/—r gcb5 Protection 3443 Routier Road,Suite A,Sacramento,California 95827.3003 Phone(916)255-3000•FAN(910)255-3015 13 December 2000 Mr. Vincent Westphal VIA FACSIMILE Bear Creek Winery 11900 North Furry Road Lodi, CA 95240 CONDITIONAL APPROVAL OF GROUNDWATER MONITORING WORKPLAN, BEAR CREEK WINERY, LODI, SANJOAQUINCOUNT)" TRACY, SANJOAQUIN COUNTY I have reviewed the 27 November 2000 "Monitoring Well Installation Workplan, "prepared by Applied Science and Engineering. The workplan was received at the Board on 8 December 2000 and was prepared in response to Regional Board correspondence dated 25 September 2000 requesting installation of groundwater monitoring wells for the Bear Creek Winery wastewater disposal areas. After reviewing the workplan, I have the following comments: • No wells are located downgradient of the secondary water disposal area. Please install a fourth well downgradient of the secondary disposal area and install the"upgradient well,"upgradient of the vineyard area. Resubmit Figure 1 with the new proposed well locations. • The minimum annular seal length is described as 10 feet. However, California Well Standards Bulletin 74-90 requires a minimum seal length of 20 feet (Part II, Monitoring Well Construction, Section 9.A.1). This specification may require an exemption for an unusual condition from the San Joaquin County Environmental Health Department which issues permits for the wells. • If conditions in the borehole allow, it is recommended that the sand pack be surged prior to installing the bentonite transition seal. • A table which lists the details of the groundwater sampling program is required. At a minimum, the table shall include a list of the wells to be sampled, analytical methods, sample containers, sample volumes, preservation agents, and sample holding times for each analytical method. • Please describe the sampling procedure that will be followed if the bailer attached to the pump does not provide adequate sample volume. The workplan is approved on the condition that the above comments are addressed in an addendum letter to be submitted by 19 December 2000. If you have any questions on this conditional approval,please telephone me at (916) 255-3116. TIMOTHY R. O'BRIEN _ Waste Discharge to Land Unit San Joaquin River Watershed cc: Mr. Mike Huggins, San Joaquin County Environmental Health Department, Stockton- Richard Armstrong, Applied Science and Engineering,Davis ry California Environmental Protection Agency r.w.��srv.�u..r.r,aa,.nvir�nc C.,Recycled Paper