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Item#2 Table 6 indicates that California Natural Products (CNP) staff will perform groundwater elevation measurements for the depth to groundwater measuring events when groundwater samples are not collected. Please state if the measurements to be collected by CNP staff will be performed consistent with the SAP and what equipment will be used by CNP staff. Measurements by CNP staff will be performed in accordance with that specified in the SAP. The methodology will be replicated in an attempt to provide consistent data. As stated on pages A-5 and A-6 of the SAP, CNP staff will use a conductivity-based water level indicator. Currently, the commercially-available, conductivity-based indicator used by CNP staff is a unique design that uses a small flashlight(e.g. MaglightTn that is lowered with the tailcap end of the light down the hole. The tailcap has a conductivity probe on the bottom, above-which is an insulator (o-ring), above which is another probe. When lowered into the water the first probe contacts the water surface. When the tailcap of the flashlight is further submerged, the second probe comes in contact with the water, and lighting the flashlight. When the flashlight is lit the graduated tape is measured against the mark on the north side of the top of the PVC casing. Although the "sounder" used by CNP staff appears technically sound, CNP is in the process of replacing it with a more conventional water level indicator. The model that is being purchased by CNP is the same brand that is generally used by Kleinfelder(Slope Indicator). Item#3 Section 6.2 indicates wastewater samples will be collected on a weekly basis. This is more frequent than what is required by the MRP. It is understood that CNP collects and analyzes wastewater samples at an in-house laboratory for the City of Lathrop industrial wastewater discharge permit requirements. Because all the data shall be submitted to the Regional Board, please indicate which data is generated in a State licensed laboratory. The table on the first page of the Revised MRP under the heading "Industrial Wastewater Monitoring" does state that a composite sample for BOD analysis is obtained weekly. However BOD is listed as BODS and there is no footnote at the bottom of the table. However, if the RWQCB did not intend for the composite to be obtained on a weekly basis, or if we have in some other way misinterpreted this requirement, we would be happy to make any adjustments required. It is understood that the RWQCB wants the data collected under the City of Lathrop permit reported to them also. This data will be supplied for incorporation into the monthly monitoring reports. The reports will specify which analysis was done by a State-approved laboratory. 204587-0 LSAP/2011 L330 Page 2 of 8 Copyright 2001,Kleinfelder,Inc. May 2,2001 KLEINPELDER 2825 East Myrtle Street,Stockton,CA 9520.5-4794 (209)948-1345 (209)948-0621 fax