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i <br /> California Regional Water Quality Control Board :. <br /> vCentral Valley Region <br /> Robert Schneider,Chair <br /> Winston H.Hickoz Gray Davis <br /> Secretaryfar Sacramento Main Office Governor <br /> Environmental - Internet Address: http://wvnv.swrcb.ca.govlmgcb5 <br /> Protection 0 �' �"'/1 3443 Rouder Road,Suite A,Sacramento,California 95827-3003 _ <br /> V Phone(916)255-3000•FAX(916)255-3015 - <br /> 13July 2001 12�- Z''3 (S-A <br /> .D 3a- <br /> Mr. Daniel Decker <br /> ContiGroup Companies, Ina ;S <br /> 277 Park Avenue J <br /> New York,NY 10172 <br /> REVIEW OF PRE-REMEDIATION TESTING WORK PLAN, CONTIGROUP COMPANIES, <br /> INC., 9504 S. HARLAN ROAD, FRENCH CAMP, SAN JOAQUIN COUNTY <br /> We have reviewed the 6 July 2001 Pre-Remediation Testing Work Plan (Work Plan) submitted by Haley <br /> &Aldrich, Inc. on behalf of Huff&Huff, Inc. for the ContiGroup Companies, Inc. (CGCI)French <br /> Camp Grain Elevator facility(site). The Work Plan proposes two pump tests, with groundwater <br /> extraction conducted at monitoring wells MW-qA and MW-313. The pump test will include <br /> measurements and samples collected prior to, during, and after the pump test. In addition, CGCI will <br /> collect two groundwater samples for general chemistry analyses to evaluate natural attenuation and <br /> chemical treatment technologies. The Work Plan also proposes to characterize the two onsite water <br /> wells by collecting depth discrete water samples in 10-foot intervals starting from 25 to 35 feet below <br /> ground surface (bgs) using a packer system. The groundwater samples will evaluate the distribution of <br /> contaminants in the vicinity of the two water wells and aid in determining where groundwater enters the <br /> well. If field staff determines that the water well casing is intact at a sampling interval, a groundwater <br /> sample will not be collected. Furthermore, the Work Plan proposes one location for hydropunch <br /> samples west of the site at 25 feet and 80 feet bgs to delineate the downgradient groundwater <br /> contamination. Field staff may need to adjust the proposed sampling location due to constraints at the <br /> proposed location. <br /> We have the following comments on the Work Plan: <br /> 1. The Work Plan states that additional groundwater level measurements will be collected from <br /> monitoring wells not included in the pump test, if deemed appropriate. CGCI should collect <br /> groundwater level measurements from all site monitoring wells before, during and after the pump <br /> test based on the relative close proximity of the wells onsite. Monitoring wells without data <br /> loggers may be measured with a water level sounder. <br /> 2. Table 1 of the Work Plan should include depths of the hydropunch samples. <br /> 3. The proposed hydropunch location is downgradient of monitoring wells MW-5A and MW-513. <br /> Another hydropunch location is needed to delineate the plume downgradient of monitoring well <br /> California Environmental Protection Agency <br /> ped Recycled Paper <br /> The energy challenge facing California is real. Every Californian needs to take immediate action to reduce energy consumption. <br /> 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 <br />