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California R40ional Water Quality JWntrol Board "� <br /> Central Valley Region ° ' <br /> Peter M.Rooney Sacramento Main Office Ed I Schnabel <br /> Secremryfor Intcmct Address: http://w .swrcb.c gov/— gcb5 Chair <br /> Environmental 3443 Routier Road,Suite A,Sacramento,California 95821-3003 - <br /> Protection Phone(916)255-3000•FAX(916)255-3015 <br /> 28 December 1998 <br /> Mr. Tony Martin <br /> Kleinfelder, Inc. <br /> 2825 East Myrtle Street <br /> Stockton, CA 95205 <br /> SPRECKELS MANTECA,SAN JOAQUIN COUNTY(Case No. 860) <br /> I have reviewed the Sampling and Analysis Plan (SAP)report submitted in response to the facility's <br /> Waste Discharge Requirements (WDRs) Order No. 97-204. The report describes proposed methods to <br /> monitor groundwater at the site. The report indicates that surface water monitoring is not necessary since <br /> surface water is contained on the site.Vadose zone monitoring is not proposed because the waste piles <br /> are being removed and ground water impacts are already known. <br /> The groundwater monitoring portion of the report is consistent with the facility's WDRs and is <br /> approved. Please note that monitoring reports based on the SAP must comply with the WDRs and <br /> include tabular summaries of the analytical data. The monitoring reports must clearly describe <br /> compliance with the WDRs or lack thereof. <br /> The SAP report concludes that an NPDES General Storm Water permit and associated monitoring is not <br /> necessary because no precipitation leaves the site. Although this may be true,ponded runoff from the <br /> lime piles may contribute to groundwater contamination. If possible, surface water runoff from the lime <br /> piles should be collected this winter and analyzed for the same constituents as the groundwater samples. <br /> These analyses should allow comparison of runoff from the lime piles and groundwater quality and <br /> ensure that each potential contaminant pathway is considered. <br /> I understand that routine site monitoring was postponed pending receipt of this approval letter. <br /> Monitoring should begin with the January round of sampling to bring the facility into compliance with <br /> the WDRs. If you have any questions,please call me at(916) 255-3131. <br /> J <br /> STEVE E. ROSENBAUM <br /> Associate Engineering Geologist <br /> SER <br /> cc: Mr. Ron Rowe, San Joaquin County Public Health Services, Stockton <br /> Mr. Bing Kirk,Atherton Kirk Development Company, Stockton <br /> California Environmental Protection Agency <br /> 2d Recycled Paper <br />