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SENT BY:EMCON 2-14-96 : 8.35AM EMCON SACRAMENTO- 7.09 4683078:# 3/ 7� � <br /> Gabriel Karam <br /> February 13, 1996 Project 203939-001.015 <br /> Page 2 <br /> "MW-4 has significantly higher concentrations of chloride,total dissolved <br /> solids(TDS)and electrical conductivity(EC)than back <br /> ground well MW.l. <br /> As noted in the EMP,the San Joaquin County Authority operates a migrant <br /> faun worker housing facility on land immediately adjacent to the Harney Lane <br /> Sanitary Landfill. Wastewater from the housing facility is treated in an <br /> aerated <br /> - oxidation pond and discharged into two evall0fatiOnfinfiltration ponds. Tic <br /> ponds are kwaW adjacent to well -4 which monitors groundwater quality <br /> along the perimeter of the landfill. It is possible that the adjacent ponds are die <br /> source of the impacts detected in groundwater samples from monitoring well <br /> MW-4 at the landfill. <br /> 3. Monitoring and Reporting Pmgram,Page 2,Section B.Required <br /> Monitoring Reports,hent 2. Detection and Evaluation MenitoProgrzon <br /> ring <br /> If the RWQCB has reviewed and approved of the EMP,thea this section is fine. <br /> If they Have not yet approved the EW then mention of reporting the results of <br /> evaluation mmnitoring should this stricken from this section. <br /> 4. Monitoring and Reporting Progrant,Page 3,Section D.Required <br /> Monitoring Programs,Item I. Detection and Evaluation Monitoring <br /> progrIffn <br /> If the RWQCB has reviewed and approved of the EMIP,then this section is fine. <br /> If they have not yet approved the EMP,then any mention of the evaluation <br /> monitoring should this stricken from this section. <br /> 5. Monitoring and Reporting PrOgran4 Page 7,Section D Water QuWlty <br /> Protection Standard <br /> This should be labeled Section E. <br /> 6. Monitoring and Reporting Progran4 Page 8,Table III <br /> The concentration limits were updated in the"Second Quarter and Annual 1995 <br /> Monitoring Repot,fey Lane Sanitary fill,"(EMC®N,July 1995). The <br /> most recent concentration limits established for monitoring wells MW-1,MW-3 <br /> and MW-4 should be listed in the final WDRs for the landfill.See attached <br /> Tables I and 2. (Concentration limits for MW-2 are discussed in Comment 9.) <br /> SACI&*MNWORM nor-"%b*:n <br />