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HRTESIHIPI ENV IREiIdI°IENTH TELAIW� 5 T4 ' , o5 Feb '1 :AWA�113 1ii : 12 11p . 001 F <br /> Dante Nomellini <br /> Page 2 <br /> All wells on the site must be monitored on a quarterly basis for <br /> depth to water data for determining groundwater flow patterns at <br /> the site , to verify free product removal progress and to ensure <br /> that the wells at the site are still in good repair . Monitoring <br /> 11 # 5 , located in one of the identified downgradient <br /> d �rec ions , must continue to be sampled for contaminants on a <br /> quarterly basis in order to effectively monitor the migration of <br /> the plume in that direction . When monitoring well # 7 is <br /> A <br /> nstalled in the other identified downgradient direction , it too <br /> will need to be sampled for contaminants on a quarterly basis . <br /> The sampling for contaminants in monitoring well 03 may be <br /> reduced to yearly at this time as concentrations in this area may <br /> be inferred from monitoring well # 6 . <br /> Monitoring wells # 4 and 16 may currently be. sampled for <br /> contaminants on a semi - annual basis as there are unlikely to be <br /> any significant changes in contaminant concentrations over a six <br /> month period of time . <br /> For monitoring wells # 3 , 14 and # 6 , at least one sampling event <br /> should occur during the spring quarter in order to obtain <br /> contaminant concentration data when the water table should be at <br /> its highest level . <br /> Please be advised that as additional monitoring wells are <br /> installed and as additional data becomes available , modifications <br /> to this sampling plan may be needed and requested , <br /> is you have any questions , please contact ]'' Anda Turkatte , RENS , <br /> of my staff at ( 209 ) 468 - 0339 . <br /> Jogi Khanna , ,]� . D . , M . P . H . <br /> Health Off ' 4ea� <br /> Laurie A . Cotulla , RENS , Program Manager <br /> Environmental Health Division <br /> / LACJLT : lb <br /> V �e CVRWQCB - Beth Thayer <br /> I/e : Artesian Environmental -,7im Jacobs <br />