Acid mine drainage (AMD) at Stockton Coal Mine, located near Westport, New Zealand, is generated from the oxidation of pyrite within sedimentary overburden exposed during surface mining. The pyrite oxidation releases significant acidity, Fe, and sulphate together with trace metals to the receiving environment. Aluminium is also elevated in drainage waters due to acid leaching from overburden materials. Thirteen AMD seeps emanating from waste rock dumps, and associated sediment ponds were monitored at Stockton Coal Mine to characterise water chemistry, delineate their spatial and temporal variability, and quantify metal loads. Dissolved metal concentrations ranged from 0.05-1430 mg/L Fe, 0.200-627 mg/L Al, 0.0024-0.594 mg/L Cu, 0.0052-4.21 mg/L Ni, 0.019- 18.8 mg/L Zn, <0.00005-0.0232 mg/L Cd, 0.0007-0.0028 mg/L Pb, <0.001-0.154 mg/L As and 0.103- 29.3 mg/L Mn and the pH ranged from 2.04-4.31. Currently this AMD is treated further downstream by a number of water treatment plants employing a combination of ultra fine limestone and calcium hydroxide; however, in the interest of assessing more cost-effective technologies, passive treatment systems were investigated for their treatment and hydraulic efficacy and as potential cost-effective options. Biogeochemical reactors (BGCRs) were selected as the most appropriate passive treatment system for ameliorating AMD at Stockton Coal Mine. Results of mesocosm-scale treatability tests showed that BGCRs incorporating mussel shells, Pinus radiata bark, wood fragments (post peel), and compost increased pH to ≥6.7 and sequestered ≥98.2% of the metal load from the Manchester Seep located within the Mangatini Stream catchment. The following design criteria were recommended for BGCRs incorporating 20-30 vol. % mussel shells as an alkalinity amendment: 1) 0.3 mol sulphate /m3 substrate/day for sulphate removal (mean of 94.1% removal (range of 87.6-98.0%)); 2) 0.4 mol metals/m3/day for metal (mean of 99.0% removal (range of 98.5-99.9%)) and partial sulphate (mean of 46.0% removal (range of 39.6-57.8%)) removal; and 3) 0.8 mol metals/m3/day for metal (mean of 98.4% removal (range of 98.2-98.6%) and minimal sulphate (mean of 16.6% removal (range of 11.9- 19.2%)) removal. At the maximum recommended loading rate of 0.8 mol total metals/m3/day an average of 20.0 kg/day (7.30 tonnes/year) of metals and 85.2 kg acidity as CaCO3/day could be removed from the Manchester Seep AMD by employing BGCRs. The design hydraulic residence time (HRT) would be 3.64 days. On an acidity areal loading basis, a design criterion of 65 g/m2/day was recommended. Tracer studies conducted on the BGCRs indicated ideal flow characteristics for cylindrical drumshaped reactors and non-ideal flow conditions for trapezoidal-shaped reactors indicative of shortcircuiting, channelised flow paths and internal recirculation. Consequently, this resulted in compromised treatment performance in the trapezoidal-shaped reactors. The relaxed tanks in series (TIS) model could be successfully applied to model the treatment performance of drum-shaped reactors; however, the model was unsuccessful for trapezoidal-shaped reactors. Because most pilot and full-scaled vertical flow wetlands (VFWs) have consisted of trapezoidal-prism basins excavated into the ground, the rate-removal methods previously recommended (e.g. mol metals/m3/day) should be applied to BGCR design, evaluation and operation rather than results of hydraulic and reactor modelling. Overall, a staged passive treatment approach is recommended. The first stage should consist of a sedimentation basin to remove sediment, the second stage a BGCR to remove acidity and metals and the third an aerobic wetland to provide oxygenation and tertiary treatment of metals (primarily Fe) from BGCR effluent. Preliminary analysis indicates that BGCRs are potentially a more cost-effective means of treating AMD at Stockton Coal Mine compared with the current active lime-dosing plant by over $125/tonne of acidity ($197/tonne for BGCRs versus $324/tonne for lime dosing (60% efficient)); however, their successful implementation would need to recognise current treatment goals, required areal footprint and inherent maintenance requirements.

The successful teacher possesses certain indispensable personal traits and professional attitudes. Are these traits and attitudes associated with high intelligence? Are high intelligence test scores predictive of success in teaching? Do successful teachers have a high degree of scholarship? What is the relation of a high college scholarship to success in teaching? Can the major professors predict success in teaching on the basis of success in college? How accurate is the critic teacher's report in predicting professional ability? Finally, what personal traits and professional attitudes are considered the most important by the principals and how are teachers rated on these? Consideration will be given to these questions to find out what constitutes success in teaching as indicated in the principals' and superintendents' reports.

The purpose of this study is to assemble occupational information of a statistical antire and present it in a form that will make it immediately usable to Stockton’s secondary school counselors as a basis for apprising their students of the opportunities in distributive occupations in the Stockton Unified School District.

This study. concluded in the school year 1961-62, was made to determine how well the health services that were available to the schools of the Stockton Unified School District met the needs of the children attending those schools. It was a further purpose of this study to obtain answers to the following questions: (1) What health services were available to the schools of the Stockton Unified School District? (2) How did the health services that were available to the schools compare with accepted standards, as approved by recognized authorities in the fields of public health and public school health? (3) How well were the available school health services understood by the teachers and administrators of the local school system? (4) What improvements or extensions or the present school health services were indicated by the findings of this study?

Within the Stockton community there are agencies a) whose primary purpose is treatment of juvenile offenders, or b) whose auxiliary function is the treatment of juvenile offenders . One of the working assumptions of these agencies is that if the juvenile, as a first offender or minor offender, can be diverted from the juvenile courts or even from the probation office, then the juvenile can receive more effective care and treatment. Many juvenile offenses such as truancy, or incorrigibility, or psychological problems can obviously be handled better out of court and out of jail. The purpose of this project is to investigate diversionary attempts within the Stockton community and in San Joaquin County as they apply to Stockton. This project will seek to not only identify diversionary attempts and define diversion in some of its forms, but also to produce a statement regarding the potential for city and related county agencies to achieve coordination of juvenile diversionary services.

The purposes of the study are to learn what the general areas of services are that the San Joaquin Health District is providing to the Stockton Unified School District, and to consider the fundamentals of organization and their application to the health services d related to teaching. To understand the problem of the study more completely, the investigator studied the roles of the Stockton Unified School District health personnel.

The purpose of this study was to determine: (1) the importance first-grade teachers of San Joaquin County place on manipulative devices for the teaching of arithmetic; (2) the manipulative devices first-grade teachers of San Joaquin County have and use; and (3) the uses first-grade teachers of San Joaquin County make of manipulative devices in the teaching of arithmetic.

In Stockton today there is a small number of persons who come under the category, Basque. As the origin of the Basques and their language is as yet undetermined, it lends a somewhat mysterious air to them. The purpose of this study is to determine whether the Basques, more particularly the younger generation, are becoming assimilated into the community. Are they the Basque in their manner of living, or are they American? WIthin the scope of this study fall some 219 individuals organized into eighty-seven family groups. They are the first and second generation families and their unmarried children living at home. Most of the material for this paper was gathered from them by personal interview. Very little was obtained from other sources, primarily because the author has no facility with French, Spanish, or Basque, in which languages most of the material is to be found. The study will cover two major phases. The first deals with an explanation of assimilation, historical background and other facts about the Basque people. The second section covers actual facts found in the survey made of the Basques in Stockton. The conclusion presents a brief summary of these findings. It will attempt to answer whether or not assimilation has taken place, and if it has, why.

This study should, in a small way, add an important chapter in the total local historical record, and be of particular value to the Stockton Unified School District. It is to be hoped that the following study will give proper credit to the early achievements of the schools, and give a chronology of school progress. This paper also points to the shortcomings and failures of the local schools, since there are also a part of the record.

It is worth any trouble it takes to rearrange and organize the high school or college schedule these days to enable the students to hear first hand the most important pronouncements being made by history-making leaders. The student who missed hearing Chamberlain or Hitler because he was forced by an inflexible school program to conjugate German verbs or to report on the Elizabethan period of English history, was deprived of some real education.1 In the above paragraph, John T. Studebaker, United States Commissioner of Education, asserts his belief in radio as an educational force in the United States today. Others concern with education of the youth in this country, including teachers, parents, and broadcasters, have recognized the rent potentialities of this new and tremendous force.