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�ap4U1N CA � � Li y <br /> HEHRY M. HIRATA m <br /> DIRECTOR _ MAR 181983 WILLIAM L. CYPHER <br /> DEPUTY DIRECTOR <br /> �qL/FOF Y' JOHN A. HAUO <br /> SAN JOAQUIN LOCAL DEPUTY DIRECTOR <br /> [!!FAl.TI.1 DISTRICT <br /> COUNTY OF SAN JOAQUIN <br /> DEPARTMENT OF PUBLIC WORKS <br /> P. O. BOX 1810 - 1810 E. HAZELTON AVENUE <br /> STOCKTON. CALIFORNIA 96301 <br /> (309) 944-3381 <br /> March 16, 1983 <br /> California Regional Water Quality <br /> Control Board <br /> Central Valley Region <br /> 3201 'IS" Street <br /> Sacramento, CA 95816 <br /> Attention: Mr. Robert Jones <br /> Gentlemen: <br /> As you are aware from our on-site meeting of March 15, 1983, the Lathrop <br /> Village Sewage Treatment Plant evapo-percolation ponds have experienced a <br /> reduction in percolation rate and are full . In our opinion, they have reached <br /> a level where wind action could jeopardize the integrity of the pond levees. <br /> As per our discussion, we propose to construct a temporary pond on the <br /> property to the east of the existing ponds. It is our intention to construct <br /> the pond with enough capacity to enable us to assist adjacent property owners <br /> by pumping standing storm water from low areas surrounding the plant and <br /> processing it through the plant. The temporary pond will be fenced, in order <br /> to comply with existing requirements. <br /> It is estimated that the pond will be in use until mid-summer. This will <br /> provide time for us to remove water from the ponds and allow them to dry out <br /> so that we can rip the bottoms to restore normal percolation rates and return <br /> to normal rotation operation. <br /> As you requested, I am including a sketch of the plant and the temporary <br /> pond location. <br /> Very truly yours, <br /> HENRY M. HIRATA <br /> DIRECTOR OF PUBLIC WORKS <br /> W. L. Cypher <br /> WLC:WGA:rk Deputy Director <br /> enclosure <br /> cc: Supervisor Richard Yoshikawa <br /> Lee Hall , Local Health vl�i <br />